[5] | 1 | /* |
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| 2 | ----------------------------------------------------------------------------- |
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| 3 | This source file is part of OGRE |
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| 4 | (Object-oriented Graphics Rendering Engine) |
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| 5 | For the latest info, see http://www.ogre3d.org |
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| 6 | |
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| 7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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| 8 | Also see acknowledgements in Readme.html |
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| 9 | |
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| 10 | This program is free software; you can redistribute it and/or modify it under |
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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| 12 | Foundation; either version 2 of the License, or (at your option) any later |
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| 13 | version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with |
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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| 22 | http://www.gnu.org/copyleft/lesser.txt. |
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| 23 | |
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| 24 | You may alternatively use this source under the terms of a specific version of |
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| 25 | the OGRE Unrestricted License provided you have obtained such a license from |
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| 26 | Torus Knot Software Ltd.s |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | |
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| 30 | |
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| 31 | #include "OgreGLRenderSystem.h" |
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| 32 | #include "OgreRenderSystem.h" |
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| 33 | #include "OgreLogManager.h" |
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| 34 | #include "OgreStringConverter.h" |
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| 35 | #include "OgreLight.h" |
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| 36 | #include "OgreCamera.h" |
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| 37 | #include "OgreGLTextureManager.h" |
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| 38 | #include "OgreGLHardwareVertexBuffer.h" |
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| 39 | #include "OgreGLHardwareIndexBuffer.h" |
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| 40 | #include "OgreGLDefaultHardwareBufferManager.h" |
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| 41 | #include "OgreGLUtil.h" |
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| 42 | #include "OgreGLGpuProgram.h" |
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| 43 | #include "OgreGLGpuNvparseProgram.h" |
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| 44 | #include "ATI_FS_GLGpuProgram.h" |
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| 45 | #include "OgreGLGpuProgramManager.h" |
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| 46 | #include "OgreException.h" |
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| 47 | #include "OgreGLSLExtSupport.h" |
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| 48 | #include "OgreGLHardwareOcclusionQuery.h" |
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| 49 | #include "OgreGLContext.h" |
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| 50 | |
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| 51 | #include "OgreGLFBORenderTexture.h" |
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| 52 | #include "OgreGLPBRenderTexture.h" |
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| 53 | #include "OgreConfig.h" |
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| 54 | |
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| 55 | // Convenience macro from ARB_vertex_buffer_object spec |
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| 56 | #define VBO_BUFFER_OFFSET(i) ((char *)NULL + (i)) |
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| 57 | GLenum glewContextInit (Ogre::GLSupport *glSupport); |
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| 58 | |
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| 59 | namespace Ogre { |
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| 60 | |
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| 61 | // Callback function used when registering GLGpuPrograms |
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| 62 | GpuProgram* createGLArbGpuProgram(ResourceManager* creator, |
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| 63 | const String& name, ResourceHandle handle, |
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| 64 | const String& group, bool isManual, ManualResourceLoader* loader, |
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| 65 | GpuProgramType gptype, const String& syntaxCode) |
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| 66 | { |
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| 67 | GLArbGpuProgram* ret = new GLArbGpuProgram( |
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| 68 | creator, name, handle, group, isManual, loader); |
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| 69 | ret->setType(gptype); |
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| 70 | ret->setSyntaxCode(syntaxCode); |
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| 71 | return ret; |
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| 72 | } |
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| 73 | |
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| 74 | GpuProgram* createGLGpuNvparseProgram(ResourceManager* creator, |
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| 75 | const String& name, ResourceHandle handle, |
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| 76 | const String& group, bool isManual, ManualResourceLoader* loader, |
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| 77 | GpuProgramType gptype, const String& syntaxCode) |
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| 78 | { |
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| 79 | GLGpuNvparseProgram* ret = new GLGpuNvparseProgram( |
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| 80 | creator, name, handle, group, isManual, loader); |
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| 81 | ret->setType(gptype); |
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| 82 | ret->setSyntaxCode(syntaxCode); |
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| 83 | return ret; |
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| 84 | } |
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| 85 | |
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| 86 | GpuProgram* createGL_ATI_FS_GpuProgram(ResourceManager* creator, |
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| 87 | const String& name, ResourceHandle handle, |
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| 88 | const String& group, bool isManual, ManualResourceLoader* loader, |
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| 89 | GpuProgramType gptype, const String& syntaxCode) |
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| 90 | { |
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| 91 | |
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| 92 | ATI_FS_GLGpuProgram* ret = new ATI_FS_GLGpuProgram( |
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| 93 | creator, name, handle, group, isManual, loader); |
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| 94 | ret->setType(gptype); |
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| 95 | ret->setSyntaxCode(syntaxCode); |
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| 96 | return ret; |
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| 97 | } |
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| 98 | |
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| 99 | GLRenderSystem::GLRenderSystem() |
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| 100 | : mDepthWrite(true), mStencilMask(0xFFFFFFFF), mHardwareBufferManager(0), |
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| 101 | mGpuProgramManager(0), |
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| 102 | mGLSLProgramFactory(0), |
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| 103 | mRTTManager(0) |
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| 104 | { |
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| 105 | size_t i; |
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| 106 | |
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| 107 | LogManager::getSingleton().logMessage(getName() + " created."); |
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| 108 | |
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| 109 | // Get our GLSupport |
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| 110 | mGLSupport = getGLSupport(); |
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| 111 | |
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| 112 | for( i=0; i<MAX_LIGHTS; i++ ) |
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| 113 | mLights[i] = NULL; |
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| 114 | |
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| 115 | mWorldMatrix = Matrix4::IDENTITY; |
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| 116 | mViewMatrix = Matrix4::IDENTITY; |
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| 117 | |
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| 118 | initConfigOptions(); |
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| 119 | |
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| 120 | mColourWrite[0] = mColourWrite[1] = mColourWrite[2] = mColourWrite[3] = true; |
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| 121 | |
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| 122 | for (i = 0; i < OGRE_MAX_TEXTURE_LAYERS; i++) |
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| 123 | { |
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| 124 | // Dummy value |
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| 125 | mTextureCoordIndex[i] = 99; |
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| 126 | } |
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| 127 | |
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| 128 | for (i = 0; i < OGRE_MAX_TEXTURE_LAYERS; i++) |
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| 129 | { |
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| 130 | mTextureTypes[i] = 0; |
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| 131 | } |
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| 132 | |
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| 133 | mActiveRenderTarget = 0; |
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| 134 | mCurrentContext = 0; |
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| 135 | mMainContext = 0; |
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| 136 | |
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| 137 | mGLInitialized = false; |
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| 138 | |
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| 139 | mCurrentLights = 0; |
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| 140 | mMinFilter = FO_LINEAR; |
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| 141 | mMipFilter = FO_POINT; |
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| 142 | mCurrentVertexProgram = 0; |
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| 143 | mCurrentFragmentProgram = 0; |
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| 144 | |
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| 145 | mClipPlanes.reserve(6); |
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| 146 | |
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| 147 | } |
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| 148 | |
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| 149 | GLRenderSystem::~GLRenderSystem() |
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| 150 | { |
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| 151 | shutdown(); |
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| 152 | |
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| 153 | // Destroy render windows |
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| 154 | RenderTargetMap::iterator i; |
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| 155 | for (i = mRenderTargets.begin(); i != mRenderTargets.end(); ++i) |
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| 156 | { |
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| 157 | delete i->second; |
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| 158 | } |
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| 159 | mRenderTargets.clear(); |
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| 160 | |
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| 161 | delete mGLSupport; |
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| 162 | } |
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| 163 | |
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| 164 | const String& GLRenderSystem::getName(void) const |
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| 165 | { |
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| 166 | static String strName("OpenGL Rendering Subsystem"); |
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| 167 | return strName; |
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| 168 | } |
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| 169 | |
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| 170 | void GLRenderSystem::initConfigOptions(void) |
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| 171 | { |
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| 172 | mGLSupport->addConfig(); |
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| 173 | } |
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| 174 | |
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| 175 | ConfigOptionMap& GLRenderSystem::getConfigOptions(void) |
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| 176 | { |
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| 177 | return mGLSupport->getConfigOptions(); |
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| 178 | } |
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| 179 | |
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| 180 | void GLRenderSystem::setConfigOption(const String &name, const String &value) |
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| 181 | { |
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| 182 | mGLSupport->setConfigOption(name, value); |
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| 183 | } |
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| 184 | |
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| 185 | String GLRenderSystem::validateConfigOptions(void) |
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| 186 | { |
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| 187 | // XXX Return an error string if something is invalid |
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| 188 | return mGLSupport->validateConfig(); |
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| 189 | } |
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| 190 | |
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| 191 | RenderWindow* GLRenderSystem::initialise(bool autoCreateWindow, const String& windowTitle) |
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| 192 | { |
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| 193 | mGLSupport->start(); |
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| 194 | |
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| 195 | RenderWindow* autoWindow = mGLSupport->createWindow(autoCreateWindow, this, windowTitle); |
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| 196 | |
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| 197 | |
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| 198 | _setCullingMode( mCullingMode ); |
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| 199 | |
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| 200 | return autoWindow; |
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| 201 | } |
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| 202 | |
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| 203 | void GLRenderSystem::initGL(RenderTarget *primary) |
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| 204 | { |
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| 205 | // Set main and current context |
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| 206 | mMainContext = 0; |
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| 207 | primary->getCustomAttribute("GLCONTEXT", &mMainContext); |
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| 208 | mCurrentContext = mMainContext; |
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| 209 | |
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| 210 | // Set primary context as active |
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| 211 | if(mCurrentContext) |
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| 212 | mCurrentContext->setCurrent(); |
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| 213 | |
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| 214 | // Setup GLSupport |
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| 215 | mGLSupport->initialiseExtensions(); |
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| 216 | |
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| 217 | LogManager::getSingleton().logMessage("***************************"); |
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| 218 | LogManager::getSingleton().logMessage("*** GL Renderer Started ***"); |
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| 219 | LogManager::getSingleton().logMessage("***************************"); |
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| 220 | |
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| 221 | // Get extension function pointers |
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| 222 | glewContextInit(mGLSupport); |
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| 223 | |
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| 224 | // Check for hardware mipmapping support. |
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| 225 | if(GLEW_VERSION_1_4 || GLEW_SGIS_generate_mipmap) |
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| 226 | { |
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| 227 | mCapabilities->setCapability(RSC_AUTOMIPMAP); |
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| 228 | } |
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| 229 | |
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| 230 | // Check for blending support |
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| 231 | if(GLEW_VERSION_1_3 || |
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| 232 | GLEW_ARB_texture_env_combine || |
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| 233 | GLEW_EXT_texture_env_combine) |
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| 234 | { |
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| 235 | mCapabilities->setCapability(RSC_BLENDING); |
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| 236 | } |
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| 237 | |
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| 238 | // Check for Multitexturing support and set number of texture units |
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| 239 | if(GLEW_VERSION_1_3 || |
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| 240 | GLEW_ARB_multitexture) |
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| 241 | { |
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| 242 | GLint units; |
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| 243 | glGetIntegerv( GL_MAX_TEXTURE_UNITS, &units ); |
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| 244 | mFixedFunctionTextureUnits = units; |
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| 245 | |
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| 246 | if (GLEW_ARB_fragment_program) |
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| 247 | { |
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| 248 | // Also check GL_MAX_TEXTURE_IMAGE_UNITS_ARB since NV at least |
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| 249 | // only increased this on the FX/6x00 series |
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| 250 | GLint arbUnits; |
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| 251 | glGetIntegerv( GL_MAX_TEXTURE_IMAGE_UNITS_ARB, &arbUnits ); |
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| 252 | if (arbUnits > units) |
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| 253 | units = arbUnits; |
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| 254 | } |
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| 255 | |
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| 256 | mCapabilities->setNumTextureUnits(units); |
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| 257 | |
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| 258 | } |
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| 259 | else |
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| 260 | { |
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| 261 | // If no multitexture support then set one texture unit |
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| 262 | mCapabilities->setNumTextureUnits(1); |
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| 263 | } |
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| 264 | |
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| 265 | // Check for Anisotropy support |
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| 266 | if(GLEW_EXT_texture_filter_anisotropic) |
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| 267 | { |
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| 268 | mCapabilities->setCapability(RSC_ANISOTROPY); |
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| 269 | } |
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| 270 | |
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| 271 | // Check for DOT3 support |
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| 272 | if(GLEW_VERSION_1_3 || |
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| 273 | GLEW_ARB_texture_env_dot3 || |
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| 274 | GLEW_EXT_texture_env_dot3) |
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| 275 | { |
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| 276 | mCapabilities->setCapability(RSC_DOT3); |
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| 277 | } |
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| 278 | |
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| 279 | // Check for cube mapping |
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| 280 | if(GLEW_VERSION_1_3 || |
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| 281 | GLEW_ARB_texture_cube_map || |
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| 282 | GLEW_EXT_texture_cube_map) |
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| 283 | { |
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| 284 | mCapabilities->setCapability(RSC_CUBEMAPPING); |
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| 285 | } |
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| 286 | |
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| 287 | |
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| 288 | // Point sprites |
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| 289 | if (GLEW_VERSION_2_0 || |
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| 290 | GLEW_ARB_point_sprite) |
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| 291 | { |
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| 292 | mCapabilities->setCapability(RSC_POINT_SPRITES); |
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| 293 | } |
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| 294 | // Check for point parameters |
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| 295 | if(GLEW_VERSION_1_4 || |
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| 296 | GLEW_ARB_point_parameters || |
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| 297 | GLEW_EXT_point_parameters) |
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| 298 | { |
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| 299 | mCapabilities->setCapability(RSC_POINT_EXTENDED_PARAMETERS); |
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| 300 | } |
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| 301 | |
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| 302 | // Check for hardware stencil support and set bit depth |
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| 303 | GLint stencil; |
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| 304 | glGetIntegerv(GL_STENCIL_BITS,&stencil); |
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| 305 | |
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| 306 | if(stencil) |
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| 307 | { |
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| 308 | mCapabilities->setCapability(RSC_HWSTENCIL); |
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| 309 | mCapabilities->setStencilBufferBitDepth(stencil); |
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| 310 | } |
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| 311 | |
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| 312 | // Check for VBO support |
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| 313 | if(GLEW_VERSION_1_5 || GLEW_ARB_vertex_buffer_object) |
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| 314 | { |
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| 315 | // Some buggy driver claim that it is GL 1.5 compliant and |
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| 316 | // not support ARB_vertex_buffer_object |
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| 317 | if (!GLEW_ARB_vertex_buffer_object) |
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| 318 | { |
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| 319 | // Assign ARB functions same to GL 1.5 version since |
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| 320 | // interface identical |
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| 321 | glBindBufferARB = glBindBuffer; |
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| 322 | glBufferDataARB = glBufferData; |
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| 323 | glBufferSubDataARB = glBufferSubData; |
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| 324 | glDeleteBuffersARB = glDeleteBuffers; |
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| 325 | glGenBuffersARB = glGenBuffers; |
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| 326 | glGetBufferParameterivARB = glGetBufferParameteriv; |
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| 327 | glGetBufferPointervARB = glGetBufferPointerv; |
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| 328 | glGetBufferSubDataARB = glGetBufferSubData; |
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| 329 | glIsBufferARB = glIsBuffer; |
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| 330 | glMapBufferARB = glMapBuffer; |
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| 331 | glUnmapBufferARB = glUnmapBuffer; |
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| 332 | } |
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| 333 | |
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| 334 | mCapabilities->setCapability(RSC_VBO); |
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| 335 | |
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| 336 | mHardwareBufferManager = new GLHardwareBufferManager; |
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| 337 | } |
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| 338 | else |
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| 339 | { |
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| 340 | mHardwareBufferManager = new GLDefaultHardwareBufferManager; |
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| 341 | } |
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| 342 | |
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| 343 | // XXX Need to check for nv2 support and make a program manager for it |
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| 344 | // XXX Probably nv1 as well for older cards |
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| 345 | // GPU Program Manager setup |
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| 346 | mGpuProgramManager = new GLGpuProgramManager(); |
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| 347 | |
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| 348 | if(GLEW_ARB_vertex_program) |
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| 349 | { |
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| 350 | mCapabilities->setCapability(RSC_VERTEX_PROGRAM); |
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| 351 | |
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| 352 | // Vertex Program Properties |
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| 353 | mCapabilities->setMaxVertexProgramVersion("arbvp1"); |
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| 354 | mCapabilities->setVertexProgramConstantBoolCount(0); |
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| 355 | mCapabilities->setVertexProgramConstantIntCount(0); |
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| 356 | |
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| 357 | GLint floatConstantCount; |
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| 358 | glGetProgramivARB(GL_VERTEX_PROGRAM_ARB, GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB, &floatConstantCount); |
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| 359 | mCapabilities->setVertexProgramConstantFloatCount(floatConstantCount); |
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| 360 | |
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| 361 | mGpuProgramManager->_pushSyntaxCode("arbvp1"); |
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| 362 | mGpuProgramManager->registerProgramFactory("arbvp1", createGLArbGpuProgram); |
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| 363 | if (GLEW_NV_vertex_program2_option) |
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| 364 | { |
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| 365 | mCapabilities->setMaxVertexProgramVersion("vp30"); |
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| 366 | mGpuProgramManager->_pushSyntaxCode("vp30"); |
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| 367 | mGpuProgramManager->registerProgramFactory("vp30", createGLArbGpuProgram); |
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| 368 | } |
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| 369 | |
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| 370 | if (GLEW_NV_vertex_program3) |
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| 371 | { |
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| 372 | mCapabilities->setMaxVertexProgramVersion("vp40"); |
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| 373 | mGpuProgramManager->_pushSyntaxCode("vp40"); |
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| 374 | mGpuProgramManager->registerProgramFactory("vp40", createGLArbGpuProgram); |
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| 375 | } |
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| 376 | } |
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| 377 | |
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| 378 | if (GLEW_NV_register_combiners2 && |
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| 379 | GLEW_NV_texture_shader) |
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| 380 | { |
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| 381 | mCapabilities->setCapability(RSC_FRAGMENT_PROGRAM); |
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| 382 | mCapabilities->setMaxFragmentProgramVersion("fp20"); |
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| 383 | |
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| 384 | mGpuProgramManager->_pushSyntaxCode("fp20"); |
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| 385 | mGpuProgramManager->registerProgramFactory("fp20", createGLGpuNvparseProgram); |
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| 386 | } |
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| 387 | |
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| 388 | // NFZ - check for ATI fragment shader support |
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| 389 | if (GLEW_ATI_fragment_shader) |
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| 390 | { |
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| 391 | mCapabilities->setCapability(RSC_FRAGMENT_PROGRAM); |
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| 392 | mCapabilities->setMaxFragmentProgramVersion("ps_1_4"); |
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| 393 | // no boolean params allowed |
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| 394 | mCapabilities->setFragmentProgramConstantBoolCount(0); |
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| 395 | // no integer params allowed |
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| 396 | mCapabilities->setFragmentProgramConstantIntCount(0); |
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| 397 | |
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| 398 | // only 8 Vector4 constant floats supported |
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| 399 | mCapabilities->setFragmentProgramConstantFloatCount(8); |
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| 400 | |
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| 401 | mGpuProgramManager->_pushSyntaxCode("ps_1_4"); |
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| 402 | mGpuProgramManager->_pushSyntaxCode("ps_1_3"); |
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| 403 | mGpuProgramManager->_pushSyntaxCode("ps_1_2"); |
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| 404 | mGpuProgramManager->_pushSyntaxCode("ps_1_1"); |
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| 405 | |
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| 406 | mGpuProgramManager->registerProgramFactory("ps_1_4", createGL_ATI_FS_GpuProgram); |
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| 407 | mGpuProgramManager->registerProgramFactory("ps_1_3", createGL_ATI_FS_GpuProgram); |
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| 408 | mGpuProgramManager->registerProgramFactory("ps_1_2", createGL_ATI_FS_GpuProgram); |
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| 409 | mGpuProgramManager->registerProgramFactory("ps_1_1", createGL_ATI_FS_GpuProgram); |
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| 410 | } |
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| 411 | |
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| 412 | if (GLEW_ARB_fragment_program) |
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| 413 | { |
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| 414 | mCapabilities->setCapability(RSC_FRAGMENT_PROGRAM); |
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| 415 | |
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| 416 | // Fragment Program Properties |
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| 417 | mCapabilities->setMaxFragmentProgramVersion("arbfp1"); |
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| 418 | mCapabilities->setFragmentProgramConstantBoolCount(0); |
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| 419 | mCapabilities->setFragmentProgramConstantIntCount(0); |
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| 420 | |
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| 421 | GLint floatConstantCount; |
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| 422 | glGetProgramivARB(GL_FRAGMENT_PROGRAM_ARB, GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB, &floatConstantCount); |
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| 423 | mCapabilities->setFragmentProgramConstantFloatCount(floatConstantCount); |
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| 424 | |
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| 425 | mGpuProgramManager->_pushSyntaxCode("arbfp1"); |
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| 426 | mGpuProgramManager->registerProgramFactory("arbfp1", createGLArbGpuProgram); |
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| 427 | if (GLEW_NV_fragment_program_option) |
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| 428 | { |
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| 429 | mCapabilities->setMaxFragmentProgramVersion("fp30"); |
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| 430 | mGpuProgramManager->_pushSyntaxCode("fp30"); |
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| 431 | mGpuProgramManager->registerProgramFactory("fp30", createGLArbGpuProgram); |
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| 432 | } |
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| 433 | |
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| 434 | if (GLEW_NV_fragment_program2) |
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| 435 | { |
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| 436 | mCapabilities->setMaxFragmentProgramVersion("fp40"); |
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| 437 | mGpuProgramManager->_pushSyntaxCode("fp40"); |
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| 438 | mGpuProgramManager->registerProgramFactory("fp40", createGLArbGpuProgram); |
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| 439 | } |
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| 440 | } |
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| 441 | |
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| 442 | // NFZ - Check if GLSL is supported |
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| 443 | if ( GLEW_VERSION_2_0 || |
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| 444 | (GLEW_ARB_shading_language_100 && |
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| 445 | GLEW_ARB_shader_objects && |
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| 446 | GLEW_ARB_fragment_shader && |
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| 447 | GLEW_ARB_vertex_shader) ) |
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| 448 | { |
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| 449 | // NFZ - check for GLSL vertex and fragment shader support successful |
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| 450 | mGLSLProgramFactory = new GLSLProgramFactory(); |
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| 451 | HighLevelGpuProgramManager::getSingleton().addFactory(mGLSLProgramFactory); |
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| 452 | mGpuProgramManager->_pushSyntaxCode("glsl"); |
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| 453 | LogManager::getSingleton().logMessage("GLSL support detected"); |
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| 454 | } |
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| 455 | |
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| 456 | // Check for texture compression |
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| 457 | if(GLEW_VERSION_1_3 || GLEW_ARB_texture_compression) |
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| 458 | { |
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| 459 | mCapabilities->setCapability(RSC_TEXTURE_COMPRESSION); |
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| 460 | |
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| 461 | // Check for dxt compression |
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| 462 | if(GLEW_EXT_texture_compression_s3tc) |
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| 463 | { |
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| 464 | mCapabilities->setCapability(RSC_TEXTURE_COMPRESSION_DXT); |
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| 465 | } |
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| 466 | // Check for vtc compression |
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| 467 | if(GLEW_NV_texture_compression_vtc) |
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| 468 | { |
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| 469 | mCapabilities->setCapability(RSC_TEXTURE_COMPRESSION_VTC); |
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| 470 | } |
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| 471 | } |
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| 472 | |
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| 473 | // Scissor test is standard in GL 1.2 (is it emulated on some cards though?) |
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| 474 | mCapabilities->setCapability(RSC_SCISSOR_TEST); |
---|
| 475 | // As are user clipping planes |
---|
| 476 | mCapabilities->setCapability(RSC_USER_CLIP_PLANES); |
---|
| 477 | |
---|
| 478 | // 2-sided stencil? |
---|
| 479 | if (GLEW_VERSION_2_0 || GLEW_EXT_stencil_two_side) |
---|
| 480 | { |
---|
| 481 | mCapabilities->setCapability(RSC_TWO_SIDED_STENCIL); |
---|
| 482 | } |
---|
| 483 | // stencil wrapping? |
---|
| 484 | if (GLEW_VERSION_1_4 || GLEW_EXT_stencil_wrap) |
---|
| 485 | { |
---|
| 486 | mCapabilities->setCapability(RSC_STENCIL_WRAP); |
---|
| 487 | } |
---|
| 488 | |
---|
| 489 | // Check for hardware occlusion support |
---|
| 490 | if(GLEW_VERSION_1_5 || GLEW_ARB_occlusion_query) |
---|
| 491 | { |
---|
| 492 | // Some buggy driver claim that it is GL 1.5 compliant and |
---|
| 493 | // not support ARB_occlusion_query |
---|
| 494 | if (!GLEW_ARB_occlusion_query) |
---|
| 495 | { |
---|
| 496 | // Assign ARB functions same to GL 1.5 version since |
---|
| 497 | // interface identical |
---|
| 498 | glBeginQueryARB = glBeginQuery; |
---|
| 499 | glDeleteQueriesARB = glDeleteQueries; |
---|
| 500 | glEndQueryARB = glEndQuery; |
---|
| 501 | glGenQueriesARB = glGenQueries; |
---|
| 502 | glGetQueryObjectivARB = glGetQueryObjectiv; |
---|
| 503 | glGetQueryObjectuivARB = glGetQueryObjectuiv; |
---|
| 504 | glGetQueryivARB = glGetQueryiv; |
---|
| 505 | glIsQueryARB = glIsQuery; |
---|
| 506 | } |
---|
| 507 | |
---|
| 508 | mCapabilities->setCapability(RSC_HWOCCLUSION); |
---|
| 509 | } |
---|
| 510 | else if (GLEW_NV_occlusion_query) |
---|
| 511 | { |
---|
| 512 | // Support NV extension too for old hardware |
---|
| 513 | mCapabilities->setCapability(RSC_HWOCCLUSION); |
---|
| 514 | } |
---|
| 515 | |
---|
| 516 | // UBYTE4 always supported |
---|
| 517 | mCapabilities->setCapability(RSC_VERTEX_FORMAT_UBYTE4); |
---|
| 518 | |
---|
| 519 | // Inifinite far plane always supported |
---|
| 520 | mCapabilities->setCapability(RSC_INFINITE_FAR_PLANE); |
---|
| 521 | |
---|
| 522 | // Check for non-power-of-2 texture support |
---|
| 523 | if(GLEW_ARB_texture_non_power_of_two) |
---|
| 524 | { |
---|
| 525 | mCapabilities->setCapability(RSC_NON_POWER_OF_2_TEXTURES); |
---|
| 526 | } |
---|
| 527 | |
---|
| 528 | // Check for Float textures |
---|
| 529 | if(GLEW_ATI_texture_float || GLEW_ARB_texture_float) |
---|
| 530 | { |
---|
| 531 | mCapabilities->setCapability(RSC_TEXTURE_FLOAT); |
---|
| 532 | } |
---|
| 533 | |
---|
| 534 | // 3D textures should be supported by GL 1.2, which is our minimum version |
---|
| 535 | mCapabilities->setCapability(RSC_TEXTURE_3D); |
---|
| 536 | |
---|
| 537 | /// Do this after extension function pointers are initialised as the extension |
---|
| 538 | /// is used to probe further capabilities. |
---|
| 539 | ConfigOptionMap::iterator cfi = getConfigOptions().find("RTT Preferred Mode"); |
---|
| 540 | // RTT Mode: 0 use whatever available, 1 use PBuffers, 2 force use copying |
---|
| 541 | int rttMode = 0; |
---|
| 542 | if (cfi != getConfigOptions().end()) |
---|
| 543 | { |
---|
| 544 | if (cfi->second.currentValue == "PBuffer") |
---|
| 545 | { |
---|
| 546 | rttMode = 1; |
---|
| 547 | } |
---|
| 548 | else if (cfi->second.currentValue == "Copy") |
---|
| 549 | { |
---|
| 550 | rttMode = 2; |
---|
| 551 | } |
---|
| 552 | } |
---|
| 553 | // Check for framebuffer object extension |
---|
| 554 | if(GLEW_EXT_framebuffer_object && rttMode < 1) |
---|
| 555 | { |
---|
| 556 | // Probe number of draw buffers |
---|
| 557 | // Only makes sense with FBO support, so probe here |
---|
| 558 | if(GLEW_VERSION_2_0 || |
---|
| 559 | GLEW_ARB_draw_buffers || |
---|
| 560 | GLEW_ATI_draw_buffers) |
---|
| 561 | { |
---|
| 562 | GLint buffers; |
---|
| 563 | glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &buffers); |
---|
| 564 | mCapabilities->setNumMultiRenderTargets(std::min(buffers, OGRE_MAX_MULTIPLE_RENDER_TARGETS)); |
---|
| 565 | if(!GLEW_VERSION_2_0) |
---|
| 566 | { |
---|
| 567 | // Before GL version 2.0, we need to get one of the extensions |
---|
| 568 | if(GLEW_ARB_draw_buffers) |
---|
| 569 | __glewDrawBuffers = glDrawBuffersARB; |
---|
| 570 | else if(GLEW_ATI_draw_buffers) |
---|
| 571 | __glewDrawBuffers = glDrawBuffersATI; |
---|
| 572 | } |
---|
| 573 | } |
---|
| 574 | // Create FBO manager |
---|
| 575 | LogManager::getSingleton().logMessage("GL: Using GL_EXT_framebuffer_object for rendering to textures (best)"); |
---|
| 576 | //mRTTManager = new GLFBOManager(mGLSupport->getGLVendor() == "ATI"); |
---|
| 577 | mRTTManager = new GLFBOManager(false); |
---|
| 578 | mCapabilities->setCapability(RSC_HWRENDER_TO_TEXTURE); |
---|
| 579 | } |
---|
| 580 | else |
---|
| 581 | { |
---|
| 582 | // Check GLSupport for PBuffer support |
---|
| 583 | if(mGLSupport->supportsPBuffers() && rttMode < 2) |
---|
| 584 | { |
---|
| 585 | // Use PBuffers |
---|
| 586 | mRTTManager = new GLPBRTTManager(mGLSupport, primary); |
---|
| 587 | LogManager::getSingleton().logMessage("GL: Using PBuffers for rendering to textures"); |
---|
| 588 | mCapabilities->setCapability(RSC_HWRENDER_TO_TEXTURE); |
---|
| 589 | } |
---|
| 590 | else |
---|
| 591 | { |
---|
| 592 | // No pbuffer support either -- fallback to simplest copying from framebuffer |
---|
| 593 | mRTTManager = new GLCopyingRTTManager(); |
---|
| 594 | LogManager::getSingleton().logMessage("GL: Using framebuffer copy for rendering to textures (worst)"); |
---|
| 595 | LogManager::getSingleton().logMessage("GL: Warning: RenderTexture size is restricted to size of framebuffer. If you are on Linux, consider using GLX instead of SDL."); |
---|
| 596 | } |
---|
| 597 | } |
---|
| 598 | |
---|
| 599 | // Point size |
---|
| 600 | float ps; |
---|
| 601 | glGetFloatv(GL_POINT_SIZE_MAX, &ps); |
---|
| 602 | mCapabilities->setMaxPointSize(ps); |
---|
| 603 | |
---|
| 604 | // Vertex texture fetching |
---|
| 605 | GLint vUnits; |
---|
| 606 | glGetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB, &vUnits); |
---|
| 607 | mCapabilities->setNumVertexTextureUnits(static_cast<ushort>(vUnits)); |
---|
| 608 | if (vUnits > 0) |
---|
| 609 | { |
---|
| 610 | mCapabilities->setCapability(RSC_VERTEX_TEXTURE_FETCH); |
---|
| 611 | } |
---|
| 612 | // GL always shares vertex and fragment texture units (for now?) |
---|
| 613 | mCapabilities->setVertexTextureUnitsShared(true); |
---|
| 614 | |
---|
| 615 | // Mipmap LOD biasing? |
---|
| 616 | if (GLEW_VERSION_1_4 || GLEW_EXT_texture_lod_bias) |
---|
| 617 | { |
---|
| 618 | mCapabilities->setCapability(RSC_MIPMAP_LOD_BIAS); |
---|
| 619 | } |
---|
| 620 | |
---|
| 621 | |
---|
| 622 | Log* defaultLog = LogManager::getSingleton().getDefaultLog(); |
---|
| 623 | if (defaultLog) |
---|
| 624 | { |
---|
| 625 | mCapabilities->log(defaultLog); |
---|
| 626 | } |
---|
| 627 | |
---|
| 628 | /// Create the texture manager |
---|
| 629 | mTextureManager = new GLTextureManager(*mGLSupport); |
---|
| 630 | |
---|
| 631 | mGLInitialized = true; |
---|
| 632 | } |
---|
| 633 | |
---|
| 634 | void GLRenderSystem::reinitialise(void) |
---|
| 635 | { |
---|
| 636 | this->shutdown(); |
---|
| 637 | this->initialise(true); |
---|
| 638 | } |
---|
| 639 | |
---|
| 640 | void GLRenderSystem::shutdown(void) |
---|
| 641 | { |
---|
| 642 | RenderSystem::shutdown(); |
---|
| 643 | |
---|
| 644 | // Deleting the GLSL program factory |
---|
| 645 | if (mGLSLProgramFactory) |
---|
| 646 | { |
---|
| 647 | // Remove from manager safely |
---|
| 648 | if (HighLevelGpuProgramManager::getSingletonPtr()) |
---|
| 649 | HighLevelGpuProgramManager::getSingleton().removeFactory(mGLSLProgramFactory); |
---|
| 650 | delete mGLSLProgramFactory; |
---|
| 651 | mGLSLProgramFactory = 0; |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | // Deleting the GPU program manager and hardware buffer manager. Has to be done before the mGLSupport->stop(). |
---|
| 655 | delete mGpuProgramManager; |
---|
| 656 | mGpuProgramManager = 0; |
---|
| 657 | |
---|
| 658 | delete mHardwareBufferManager; |
---|
| 659 | mHardwareBufferManager = 0; |
---|
| 660 | |
---|
| 661 | delete mRTTManager; |
---|
| 662 | mRTTManager = 0; |
---|
| 663 | |
---|
| 664 | // Delete extra threads contexts |
---|
| 665 | for (GLContextList::iterator i = mBackgroundContextList.begin(); |
---|
| 666 | i != mBackgroundContextList.end(); ++i) |
---|
| 667 | { |
---|
| 668 | delete *i; |
---|
| 669 | } |
---|
| 670 | mBackgroundContextList.clear(); |
---|
| 671 | |
---|
| 672 | mGLSupport->stop(); |
---|
| 673 | mStopRendering = true; |
---|
| 674 | |
---|
| 675 | delete mTextureManager; |
---|
| 676 | mTextureManager = 0; |
---|
| 677 | |
---|
| 678 | // There will be a new initial window and so forth, thus any call to test |
---|
| 679 | // some params will access an invalid pointer, so it is best to reset |
---|
| 680 | // the whole state. |
---|
| 681 | mGLInitialized = 0; |
---|
| 682 | } |
---|
| 683 | |
---|
| 684 | void GLRenderSystem::setAmbientLight(float r, float g, float b) |
---|
| 685 | { |
---|
| 686 | GLfloat lmodel_ambient[] = {r, g, b, 1.0}; |
---|
| 687 | glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient); |
---|
| 688 | } |
---|
| 689 | |
---|
| 690 | void GLRenderSystem::setShadingType(ShadeOptions so) |
---|
| 691 | { |
---|
| 692 | switch(so) |
---|
| 693 | { |
---|
| 694 | case SO_FLAT: |
---|
| 695 | glShadeModel(GL_FLAT); |
---|
| 696 | break; |
---|
| 697 | default: |
---|
| 698 | glShadeModel(GL_SMOOTH); |
---|
| 699 | break; |
---|
| 700 | } |
---|
| 701 | } |
---|
| 702 | |
---|
| 703 | RenderWindow* GLRenderSystem::createRenderWindow(const String &name, |
---|
| 704 | unsigned int width, unsigned int height, bool fullScreen, |
---|
| 705 | const NameValuePairList *miscParams) |
---|
| 706 | { |
---|
| 707 | if (mRenderTargets.find(name) != mRenderTargets.end()) |
---|
| 708 | { |
---|
| 709 | OGRE_EXCEPT( |
---|
| 710 | Exception::ERR_INVALIDPARAMS, |
---|
| 711 | "Window with name '" + name + "' already exists", |
---|
| 712 | "GLRenderSystem::createRenderWindow" ); |
---|
| 713 | } |
---|
| 714 | // Log a message |
---|
| 715 | std::stringstream ss; |
---|
| 716 | ss << "GLRenderSystem::createRenderWindow \"" << name << "\", " << |
---|
| 717 | width << "x" << height << " "; |
---|
| 718 | if(fullScreen) |
---|
| 719 | ss << "fullscreen "; |
---|
| 720 | else |
---|
| 721 | ss << "windowed "; |
---|
| 722 | if(miscParams) |
---|
| 723 | { |
---|
| 724 | ss << " miscParams: "; |
---|
| 725 | NameValuePairList::const_iterator it; |
---|
| 726 | for(it=miscParams->begin(); it!=miscParams->end(); ++it) |
---|
| 727 | { |
---|
| 728 | ss << it->first << "=" << it->second << " "; |
---|
| 729 | } |
---|
| 730 | LogManager::getSingleton().logMessage(ss.str()); |
---|
| 731 | } |
---|
| 732 | |
---|
| 733 | // Create the window |
---|
| 734 | RenderWindow* win = mGLSupport->newWindow(name, width, height, |
---|
| 735 | fullScreen, miscParams); |
---|
| 736 | |
---|
| 737 | attachRenderTarget( *win ); |
---|
| 738 | |
---|
| 739 | if (!mGLInitialized) |
---|
| 740 | { |
---|
| 741 | // Initialise GL after the first window has been created |
---|
| 742 | initGL(win); |
---|
| 743 | |
---|
| 744 | // Initialise the main context |
---|
| 745 | _oneTimeContextInitialization(); |
---|
| 746 | if(mCurrentContext) |
---|
| 747 | mCurrentContext->setInitialized(); |
---|
| 748 | } |
---|
| 749 | |
---|
| 750 | return win; |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | //----------------------------------------------------------------------- |
---|
| 754 | MultiRenderTarget * GLRenderSystem::createMultiRenderTarget(const String & name) |
---|
| 755 | { |
---|
| 756 | MultiRenderTarget *retval = mRTTManager->createMultiRenderTarget(name); |
---|
| 757 | attachRenderTarget( *retval ); |
---|
| 758 | return retval; |
---|
| 759 | } |
---|
| 760 | |
---|
| 761 | //----------------------------------------------------------------------- |
---|
| 762 | void GLRenderSystem::destroyRenderWindow(RenderWindow* pWin) |
---|
| 763 | { |
---|
| 764 | // Find it to remove from list |
---|
| 765 | RenderTargetMap::iterator i = mRenderTargets.begin(); |
---|
| 766 | |
---|
| 767 | while (i != mRenderTargets.end()) |
---|
| 768 | { |
---|
| 769 | if (i->second == pWin) |
---|
| 770 | { |
---|
| 771 | mRenderTargets.erase(i); |
---|
| 772 | delete pWin; |
---|
| 773 | break; |
---|
| 774 | } |
---|
| 775 | } |
---|
| 776 | } |
---|
| 777 | |
---|
| 778 | //--------------------------------------------------------------------- |
---|
| 779 | void GLRenderSystem::_useLights(const LightList& lights, unsigned short limit) |
---|
| 780 | { |
---|
| 781 | // Save previous modelview |
---|
| 782 | glMatrixMode(GL_MODELVIEW); |
---|
| 783 | glPushMatrix(); |
---|
| 784 | // just load view matrix (identity world) |
---|
| 785 | GLfloat mat[16]; |
---|
| 786 | makeGLMatrix(mat, mViewMatrix); |
---|
| 787 | glLoadMatrixf(mat); |
---|
| 788 | |
---|
| 789 | LightList::const_iterator i, iend; |
---|
| 790 | iend = lights.end(); |
---|
| 791 | unsigned short num = 0; |
---|
| 792 | for (i = lights.begin(); i != iend && num < limit; ++i, ++num) |
---|
| 793 | { |
---|
| 794 | setGLLight(num, *i); |
---|
| 795 | mLights[num] = *i; |
---|
| 796 | } |
---|
| 797 | // Disable extra lights |
---|
| 798 | for (; num < mCurrentLights; ++num) |
---|
| 799 | { |
---|
| 800 | setGLLight(num, NULL); |
---|
| 801 | mLights[num] = NULL; |
---|
| 802 | } |
---|
| 803 | mCurrentLights = std::min(limit, static_cast<unsigned short>(lights.size())); |
---|
| 804 | |
---|
| 805 | setLights(); |
---|
| 806 | |
---|
| 807 | // restore previous |
---|
| 808 | glPopMatrix(); |
---|
| 809 | |
---|
| 810 | } |
---|
| 811 | |
---|
| 812 | void GLRenderSystem::setGLLight(size_t index, Light* lt) |
---|
| 813 | { |
---|
| 814 | GLenum gl_index = GL_LIGHT0 + index; |
---|
| 815 | |
---|
| 816 | if (!lt) |
---|
| 817 | { |
---|
| 818 | // Disable in the scene |
---|
| 819 | glDisable(gl_index); |
---|
| 820 | } |
---|
| 821 | else |
---|
| 822 | { |
---|
| 823 | switch (lt->getType()) |
---|
| 824 | { |
---|
| 825 | case Light::LT_SPOTLIGHT: |
---|
| 826 | glLightf( gl_index, GL_SPOT_CUTOFF, 0.5f * lt->getSpotlightOuterAngle().valueDegrees() ); |
---|
| 827 | glLightf(gl_index, GL_SPOT_EXPONENT, lt->getSpotlightFalloff()); |
---|
| 828 | break; |
---|
| 829 | default: |
---|
| 830 | glLightf( gl_index, GL_SPOT_CUTOFF, 180.0 ); |
---|
| 831 | break; |
---|
| 832 | } |
---|
| 833 | |
---|
| 834 | // Color |
---|
| 835 | ColourValue col; |
---|
| 836 | col = lt->getDiffuseColour(); |
---|
| 837 | |
---|
| 838 | |
---|
| 839 | GLfloat f4vals[4] = {col.r, col.g, col.b, col.a}; |
---|
| 840 | glLightfv(gl_index, GL_DIFFUSE, f4vals); |
---|
| 841 | |
---|
| 842 | col = lt->getSpecularColour(); |
---|
| 843 | f4vals[0] = col.r; |
---|
| 844 | f4vals[1] = col.g; |
---|
| 845 | f4vals[2] = col.b; |
---|
| 846 | f4vals[3] = col.a; |
---|
| 847 | glLightfv(gl_index, GL_SPECULAR, f4vals); |
---|
| 848 | |
---|
| 849 | |
---|
| 850 | // Disable ambient light for movables; |
---|
| 851 | f4vals[0] = 0; |
---|
| 852 | f4vals[1] = 0; |
---|
| 853 | f4vals[2] = 0; |
---|
| 854 | f4vals[3] = 1; |
---|
| 855 | glLightfv(gl_index, GL_AMBIENT, f4vals); |
---|
| 856 | |
---|
| 857 | setGLLightPositionDirection(lt, gl_index); |
---|
| 858 | |
---|
| 859 | |
---|
| 860 | // Attenuation |
---|
| 861 | glLightf(gl_index, GL_CONSTANT_ATTENUATION, lt->getAttenuationConstant()); |
---|
| 862 | glLightf(gl_index, GL_LINEAR_ATTENUATION, lt->getAttenuationLinear()); |
---|
| 863 | glLightf(gl_index, GL_QUADRATIC_ATTENUATION, lt->getAttenuationQuadric()); |
---|
| 864 | // Enable in the scene |
---|
| 865 | glEnable(gl_index); |
---|
| 866 | |
---|
| 867 | } |
---|
| 868 | |
---|
| 869 | } |
---|
| 870 | |
---|
| 871 | //----------------------------------------------------------------------------- |
---|
| 872 | void GLRenderSystem::makeGLMatrix(GLfloat gl_matrix[16], const Matrix4& m) |
---|
| 873 | { |
---|
| 874 | size_t x = 0; |
---|
| 875 | for (size_t i = 0; i < 4; i++) |
---|
| 876 | { |
---|
| 877 | for (size_t j = 0; j < 4; j++) |
---|
| 878 | { |
---|
| 879 | gl_matrix[x] = m[j][i]; |
---|
| 880 | x++; |
---|
| 881 | } |
---|
| 882 | } |
---|
| 883 | } |
---|
| 884 | //----------------------------------------------------------------------------- |
---|
| 885 | void GLRenderSystem::_setWorldMatrix( const Matrix4 &m ) |
---|
| 886 | { |
---|
| 887 | GLfloat mat[16]; |
---|
| 888 | mWorldMatrix = m; |
---|
| 889 | makeGLMatrix( mat, mViewMatrix * mWorldMatrix ); |
---|
| 890 | glMatrixMode(GL_MODELVIEW); |
---|
| 891 | glLoadMatrixf(mat); |
---|
| 892 | } |
---|
| 893 | |
---|
| 894 | //----------------------------------------------------------------------------- |
---|
| 895 | void GLRenderSystem::_setViewMatrix( const Matrix4 &m ) |
---|
| 896 | { |
---|
| 897 | mViewMatrix = m; |
---|
| 898 | |
---|
| 899 | GLfloat mat[16]; |
---|
| 900 | makeGLMatrix( mat, mViewMatrix * mWorldMatrix ); |
---|
| 901 | glMatrixMode(GL_MODELVIEW); |
---|
| 902 | glLoadMatrixf(mat); |
---|
| 903 | |
---|
| 904 | setGLClipPlanes(); |
---|
| 905 | } |
---|
| 906 | //----------------------------------------------------------------------------- |
---|
| 907 | void GLRenderSystem::_setProjectionMatrix(const Matrix4 &m) |
---|
| 908 | { |
---|
| 909 | GLfloat mat[16]; |
---|
| 910 | makeGLMatrix(mat, m); |
---|
| 911 | if (mActiveRenderTarget->requiresTextureFlipping()) |
---|
| 912 | { |
---|
| 913 | // Invert transformed y |
---|
| 914 | mat[1] = -mat[1]; |
---|
| 915 | mat[5] = -mat[5]; |
---|
| 916 | mat[9] = -mat[9]; |
---|
| 917 | mat[13] = -mat[13]; |
---|
| 918 | } |
---|
| 919 | glMatrixMode(GL_PROJECTION); |
---|
| 920 | glLoadMatrixf(mat); |
---|
| 921 | glMatrixMode(GL_MODELVIEW); |
---|
| 922 | } |
---|
| 923 | //----------------------------------------------------------------------------- |
---|
| 924 | void GLRenderSystem::_setSurfaceParams(const ColourValue &ambient, |
---|
| 925 | const ColourValue &diffuse, const ColourValue &specular, |
---|
| 926 | const ColourValue &emissive, Real shininess, |
---|
| 927 | TrackVertexColourType tracking) |
---|
| 928 | { |
---|
| 929 | |
---|
| 930 | // Track vertex colour |
---|
| 931 | if(tracking != TVC_NONE) |
---|
| 932 | { |
---|
| 933 | GLenum gt = GL_DIFFUSE; |
---|
| 934 | // There are actually 15 different combinations for tracking, of which |
---|
| 935 | // GL only supports the most used 5. This means that we have to do some |
---|
| 936 | // magic to find the best match. NOTE: |
---|
| 937 | // GL_AMBIENT_AND_DIFFUSE != GL_AMBIENT | GL__DIFFUSE |
---|
| 938 | if(tracking & TVC_AMBIENT) |
---|
| 939 | { |
---|
| 940 | if(tracking & TVC_DIFFUSE) |
---|
| 941 | { |
---|
| 942 | gt = GL_AMBIENT_AND_DIFFUSE; |
---|
| 943 | } |
---|
| 944 | else |
---|
| 945 | { |
---|
| 946 | gt = GL_AMBIENT; |
---|
| 947 | } |
---|
| 948 | } |
---|
| 949 | else if(tracking & TVC_DIFFUSE) |
---|
| 950 | { |
---|
| 951 | gt = GL_DIFFUSE; |
---|
| 952 | } |
---|
| 953 | else if(tracking & TVC_SPECULAR) |
---|
| 954 | { |
---|
| 955 | gt = GL_SPECULAR; |
---|
| 956 | } |
---|
| 957 | else if(tracking & TVC_EMISSIVE) |
---|
| 958 | { |
---|
| 959 | gt = GL_EMISSION; |
---|
| 960 | } |
---|
| 961 | glColorMaterial(GL_FRONT_AND_BACK, gt); |
---|
| 962 | |
---|
| 963 | glEnable(GL_COLOR_MATERIAL); |
---|
| 964 | } |
---|
| 965 | else |
---|
| 966 | { |
---|
| 967 | glDisable(GL_COLOR_MATERIAL); |
---|
| 968 | } |
---|
| 969 | |
---|
| 970 | // XXX Cache previous values? |
---|
| 971 | // XXX Front or Front and Back? |
---|
| 972 | |
---|
| 973 | GLfloat f4val[4] = {diffuse.r, diffuse.g, diffuse.b, diffuse.a}; |
---|
| 974 | glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, f4val); |
---|
| 975 | f4val[0] = ambient.r; |
---|
| 976 | f4val[1] = ambient.g; |
---|
| 977 | f4val[2] = ambient.b; |
---|
| 978 | f4val[3] = ambient.a; |
---|
| 979 | glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, f4val); |
---|
| 980 | f4val[0] = specular.r; |
---|
| 981 | f4val[1] = specular.g; |
---|
| 982 | f4val[2] = specular.b; |
---|
| 983 | f4val[3] = specular.a; |
---|
| 984 | glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, f4val); |
---|
| 985 | f4val[0] = emissive.r; |
---|
| 986 | f4val[1] = emissive.g; |
---|
| 987 | f4val[2] = emissive.b; |
---|
| 988 | f4val[3] = emissive.a; |
---|
| 989 | glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, f4val); |
---|
| 990 | glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess); |
---|
| 991 | } |
---|
| 992 | //----------------------------------------------------------------------------- |
---|
| 993 | void GLRenderSystem::_setPointParameters(Real size, |
---|
| 994 | bool attenuationEnabled, Real constant, Real linear, Real quadratic, |
---|
| 995 | Real minSize, Real maxSize) |
---|
| 996 | { |
---|
| 997 | |
---|
| 998 | if(attenuationEnabled && |
---|
| 999 | mCapabilities->hasCapability(RSC_POINT_EXTENDED_PARAMETERS)) |
---|
| 1000 | { |
---|
| 1001 | // Point size is still calculated in pixels even when attenuation is |
---|
| 1002 | // enabled, which is pretty awkward, since you typically want a viewport |
---|
| 1003 | // independent size if you're looking for attenuation. |
---|
| 1004 | // So, scale the point size up by viewport size (this is equivalent to |
---|
| 1005 | // what D3D does as standard) |
---|
| 1006 | Real adjSize = size * mActiveViewport->getActualHeight(); |
---|
| 1007 | Real adjMinSize = minSize * mActiveViewport->getActualHeight(); |
---|
| 1008 | Real adjMaxSize; |
---|
| 1009 | if (maxSize == 0.0f) |
---|
| 1010 | adjMaxSize = mCapabilities->getMaxPointSize(); // pixels |
---|
| 1011 | else |
---|
| 1012 | adjMaxSize = maxSize * mActiveViewport->getActualHeight(); |
---|
| 1013 | glPointSize(adjSize); |
---|
| 1014 | |
---|
| 1015 | // XXX: why do I need this for results to be consistent with D3D? |
---|
| 1016 | // Equations are supposedly the same once you factor in vp height |
---|
| 1017 | Real correction = 0.005; |
---|
| 1018 | // scaling required |
---|
| 1019 | float val[4] = {constant, linear*correction, quadratic*correction, 1}; |
---|
| 1020 | glPointParameterfv(GL_POINT_DISTANCE_ATTENUATION, val); |
---|
| 1021 | glPointParameterf(GL_POINT_SIZE_MIN, adjMinSize); |
---|
| 1022 | glPointParameterf(GL_POINT_SIZE_MAX, adjMaxSize); |
---|
| 1023 | } |
---|
| 1024 | else |
---|
| 1025 | { |
---|
| 1026 | // no scaling required |
---|
| 1027 | // GL has no disabled flag for this so just set to constant |
---|
| 1028 | glPointSize(size); |
---|
| 1029 | |
---|
| 1030 | if (mCapabilities->hasCapability(RSC_POINT_EXTENDED_PARAMETERS)) |
---|
| 1031 | { |
---|
| 1032 | float val[4] = {1, 0, 0, 1}; |
---|
| 1033 | glPointParameterfv(GL_POINT_DISTANCE_ATTENUATION, val); |
---|
| 1034 | glPointParameterf(GL_POINT_SIZE_MIN, minSize); |
---|
| 1035 | if (maxSize == 0.0f) |
---|
| 1036 | maxSize = mCapabilities->getMaxPointSize(); |
---|
| 1037 | glPointParameterf(GL_POINT_SIZE_MAX, maxSize); |
---|
| 1038 | } |
---|
| 1039 | } |
---|
| 1040 | |
---|
| 1041 | |
---|
| 1042 | |
---|
| 1043 | } |
---|
| 1044 | //--------------------------------------------------------------------- |
---|
| 1045 | void GLRenderSystem::_setPointSpritesEnabled(bool enabled) |
---|
| 1046 | { |
---|
| 1047 | if (enabled) |
---|
| 1048 | { |
---|
| 1049 | glEnable(GL_POINT_SPRITE); |
---|
| 1050 | } |
---|
| 1051 | else |
---|
| 1052 | { |
---|
| 1053 | glDisable(GL_POINT_SPRITE); |
---|
| 1054 | } |
---|
| 1055 | |
---|
| 1056 | // Set sprite texture coord generation |
---|
| 1057 | // Don't offer this as an option since D3D links it to sprite enabled |
---|
| 1058 | for (ushort i = 0; i < mFixedFunctionTextureUnits; ++i) |
---|
| 1059 | { |
---|
| 1060 | glActiveTextureARB(GL_TEXTURE0 + i); |
---|
| 1061 | glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, |
---|
| 1062 | enabled ? GL_TRUE : GL_FALSE); |
---|
| 1063 | } |
---|
| 1064 | glActiveTextureARB(GL_TEXTURE0); |
---|
| 1065 | |
---|
| 1066 | } |
---|
| 1067 | //----------------------------------------------------------------------------- |
---|
| 1068 | void GLRenderSystem::_setTexture(size_t stage, bool enabled, const TexturePtr &texPtr) |
---|
| 1069 | { |
---|
| 1070 | GLTexturePtr tex = texPtr; |
---|
| 1071 | |
---|
| 1072 | GLenum lastTextureType = mTextureTypes[stage]; |
---|
| 1073 | |
---|
| 1074 | glActiveTextureARB( GL_TEXTURE0 + stage ); |
---|
| 1075 | if (enabled) |
---|
| 1076 | { |
---|
| 1077 | if (!tex.isNull()) |
---|
| 1078 | { |
---|
| 1079 | // note used |
---|
| 1080 | tex->touch(); |
---|
| 1081 | mTextureTypes[stage] = tex->getGLTextureTarget(); |
---|
| 1082 | } |
---|
| 1083 | else |
---|
| 1084 | // assume 2D |
---|
| 1085 | mTextureTypes[stage] = GL_TEXTURE_2D; |
---|
| 1086 | |
---|
| 1087 | if(lastTextureType != mTextureTypes[stage] && lastTextureType != 0) |
---|
| 1088 | { |
---|
| 1089 | if (stage < mFixedFunctionTextureUnits) |
---|
| 1090 | { |
---|
| 1091 | glDisable( lastTextureType ); |
---|
| 1092 | } |
---|
| 1093 | } |
---|
| 1094 | |
---|
| 1095 | if (stage < mFixedFunctionTextureUnits) |
---|
| 1096 | { |
---|
| 1097 | glEnable( mTextureTypes[stage] ); |
---|
| 1098 | } |
---|
| 1099 | |
---|
| 1100 | if(!tex.isNull()) |
---|
| 1101 | glBindTexture( mTextureTypes[stage], tex->getGLID() ); |
---|
| 1102 | else |
---|
| 1103 | glBindTexture( mTextureTypes[stage], static_cast<GLTextureManager*>(mTextureManager)->getWarningTextureID() ); |
---|
| 1104 | } |
---|
| 1105 | else |
---|
| 1106 | { |
---|
| 1107 | if (stage < mFixedFunctionTextureUnits) |
---|
| 1108 | { |
---|
| 1109 | if (lastTextureType != 0) |
---|
| 1110 | { |
---|
| 1111 | glDisable( mTextureTypes[stage] ); |
---|
| 1112 | } |
---|
| 1113 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
---|
| 1114 | } |
---|
| 1115 | // bind zero texture |
---|
| 1116 | glBindTexture (GL_TEXTURE_2D, 0); |
---|
| 1117 | } |
---|
| 1118 | |
---|
| 1119 | glActiveTextureARB( GL_TEXTURE0 ); |
---|
| 1120 | } |
---|
| 1121 | |
---|
| 1122 | //----------------------------------------------------------------------------- |
---|
| 1123 | void GLRenderSystem::_setTextureCoordSet(size_t stage, size_t index) |
---|
| 1124 | { |
---|
| 1125 | mTextureCoordIndex[stage] = index; |
---|
| 1126 | } |
---|
| 1127 | //----------------------------------------------------------------------------- |
---|
| 1128 | void GLRenderSystem::_setTextureCoordCalculation(size_t stage, TexCoordCalcMethod m, |
---|
| 1129 | const Frustum* frustum) |
---|
| 1130 | { |
---|
| 1131 | if (stage >= mFixedFunctionTextureUnits) |
---|
| 1132 | { |
---|
| 1133 | // Can't do this |
---|
| 1134 | return; |
---|
| 1135 | } |
---|
| 1136 | |
---|
| 1137 | |
---|
| 1138 | GLfloat M[16]; |
---|
| 1139 | Matrix4 projectionBias; |
---|
| 1140 | |
---|
| 1141 | // Default to no extra auto texture matrix |
---|
| 1142 | mUseAutoTextureMatrix = false; |
---|
| 1143 | |
---|
| 1144 | GLfloat eyePlaneS[] = {1.0, 0.0, 0.0, 0.0}; |
---|
| 1145 | GLfloat eyePlaneT[] = {0.0, 1.0, 0.0, 0.0}; |
---|
| 1146 | GLfloat eyePlaneR[] = {0.0, 0.0, 1.0, 0.0}; |
---|
| 1147 | GLfloat eyePlaneQ[] = {0.0, 0.0, 0.0, 1.0}; |
---|
| 1148 | |
---|
| 1149 | glActiveTextureARB( GL_TEXTURE0 + stage ); |
---|
| 1150 | |
---|
| 1151 | switch( m ) |
---|
| 1152 | { |
---|
| 1153 | case TEXCALC_NONE: |
---|
| 1154 | glDisable( GL_TEXTURE_GEN_S ); |
---|
| 1155 | glDisable( GL_TEXTURE_GEN_T ); |
---|
| 1156 | glDisable( GL_TEXTURE_GEN_R ); |
---|
| 1157 | glDisable( GL_TEXTURE_GEN_Q ); |
---|
| 1158 | break; |
---|
| 1159 | |
---|
| 1160 | case TEXCALC_ENVIRONMENT_MAP: |
---|
| 1161 | glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP ); |
---|
| 1162 | glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP ); |
---|
| 1163 | |
---|
| 1164 | glEnable( GL_TEXTURE_GEN_S ); |
---|
| 1165 | glEnable( GL_TEXTURE_GEN_T ); |
---|
| 1166 | glDisable( GL_TEXTURE_GEN_R ); |
---|
| 1167 | glDisable( GL_TEXTURE_GEN_Q ); |
---|
| 1168 | |
---|
| 1169 | // Need to use a texture matrix to flip the spheremap |
---|
| 1170 | mUseAutoTextureMatrix = true; |
---|
| 1171 | memset(mAutoTextureMatrix, 0, sizeof(GLfloat)*16); |
---|
| 1172 | mAutoTextureMatrix[0] = mAutoTextureMatrix[10] = mAutoTextureMatrix[15] = 1.0f; |
---|
| 1173 | mAutoTextureMatrix[5] = -1.0f; |
---|
| 1174 | |
---|
| 1175 | break; |
---|
| 1176 | |
---|
| 1177 | case TEXCALC_ENVIRONMENT_MAP_PLANAR: |
---|
| 1178 | // XXX This doesn't seem right?! |
---|
| 1179 | #ifdef GL_VERSION_1_3 |
---|
| 1180 | glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP ); |
---|
| 1181 | glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP ); |
---|
| 1182 | glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP ); |
---|
| 1183 | |
---|
| 1184 | glEnable( GL_TEXTURE_GEN_S ); |
---|
| 1185 | glEnable( GL_TEXTURE_GEN_T ); |
---|
| 1186 | glEnable( GL_TEXTURE_GEN_R ); |
---|
| 1187 | glDisable( GL_TEXTURE_GEN_Q ); |
---|
| 1188 | #else |
---|
| 1189 | glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP ); |
---|
| 1190 | glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP ); |
---|
| 1191 | |
---|
| 1192 | glEnable( GL_TEXTURE_GEN_S ); |
---|
| 1193 | glEnable( GL_TEXTURE_GEN_T ); |
---|
| 1194 | glDisable( GL_TEXTURE_GEN_R ); |
---|
| 1195 | glDisable( GL_TEXTURE_GEN_Q ); |
---|
| 1196 | #endif |
---|
| 1197 | break; |
---|
| 1198 | case TEXCALC_ENVIRONMENT_MAP_REFLECTION: |
---|
| 1199 | |
---|
| 1200 | glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP ); |
---|
| 1201 | glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP ); |
---|
| 1202 | glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP ); |
---|
| 1203 | |
---|
| 1204 | glEnable( GL_TEXTURE_GEN_S ); |
---|
| 1205 | glEnable( GL_TEXTURE_GEN_T ); |
---|
| 1206 | glEnable( GL_TEXTURE_GEN_R ); |
---|
| 1207 | glDisable( GL_TEXTURE_GEN_Q ); |
---|
| 1208 | |
---|
| 1209 | // We need an extra texture matrix here |
---|
| 1210 | // This sets the texture matrix to be the inverse of the view matrix |
---|
| 1211 | mUseAutoTextureMatrix = true; |
---|
| 1212 | makeGLMatrix( M, mViewMatrix); |
---|
| 1213 | |
---|
| 1214 | // Transpose 3x3 in order to invert matrix (rotation) |
---|
| 1215 | // Note that we need to invert the Z _before_ the rotation |
---|
| 1216 | // No idea why we have to invert the Z at all, but reflection is wrong without it |
---|
| 1217 | mAutoTextureMatrix[0] = M[0]; mAutoTextureMatrix[1] = M[4]; mAutoTextureMatrix[2] = -M[8]; |
---|
| 1218 | mAutoTextureMatrix[4] = M[1]; mAutoTextureMatrix[5] = M[5]; mAutoTextureMatrix[6] = -M[9]; |
---|
| 1219 | mAutoTextureMatrix[8] = M[2]; mAutoTextureMatrix[9] = M[6]; mAutoTextureMatrix[10] = -M[10]; |
---|
| 1220 | mAutoTextureMatrix[3] = mAutoTextureMatrix[7] = mAutoTextureMatrix[11] = 0.0f; |
---|
| 1221 | mAutoTextureMatrix[12] = mAutoTextureMatrix[13] = mAutoTextureMatrix[14] = 0.0f; |
---|
| 1222 | mAutoTextureMatrix[15] = 1.0f; |
---|
| 1223 | |
---|
| 1224 | break; |
---|
| 1225 | case TEXCALC_ENVIRONMENT_MAP_NORMAL: |
---|
| 1226 | glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP ); |
---|
| 1227 | glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP ); |
---|
| 1228 | glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP ); |
---|
| 1229 | |
---|
| 1230 | glEnable( GL_TEXTURE_GEN_S ); |
---|
| 1231 | glEnable( GL_TEXTURE_GEN_T ); |
---|
| 1232 | glEnable( GL_TEXTURE_GEN_R ); |
---|
| 1233 | glDisable( GL_TEXTURE_GEN_Q ); |
---|
| 1234 | break; |
---|
| 1235 | case TEXCALC_PROJECTIVE_TEXTURE: |
---|
| 1236 | glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR); |
---|
| 1237 | glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR); |
---|
| 1238 | glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR); |
---|
| 1239 | glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR); |
---|
| 1240 | glTexGenfv(GL_S, GL_EYE_PLANE, eyePlaneS); |
---|
| 1241 | glTexGenfv(GL_T, GL_EYE_PLANE, eyePlaneT); |
---|
| 1242 | glTexGenfv(GL_R, GL_EYE_PLANE, eyePlaneR); |
---|
| 1243 | glTexGenfv(GL_Q, GL_EYE_PLANE, eyePlaneQ); |
---|
| 1244 | glEnable(GL_TEXTURE_GEN_S); |
---|
| 1245 | glEnable(GL_TEXTURE_GEN_T); |
---|
| 1246 | glEnable(GL_TEXTURE_GEN_R); |
---|
| 1247 | glEnable(GL_TEXTURE_GEN_Q); |
---|
| 1248 | |
---|
| 1249 | mUseAutoTextureMatrix = true; |
---|
| 1250 | |
---|
| 1251 | // Set scale and translation matrix for projective textures |
---|
| 1252 | projectionBias = Matrix4::CLIPSPACE2DTOIMAGESPACE; |
---|
| 1253 | |
---|
| 1254 | projectionBias = projectionBias * frustum->getProjectionMatrix(); |
---|
| 1255 | projectionBias = projectionBias * frustum->getViewMatrix(); |
---|
| 1256 | projectionBias = projectionBias * mWorldMatrix; |
---|
| 1257 | |
---|
| 1258 | makeGLMatrix(mAutoTextureMatrix, projectionBias); |
---|
| 1259 | break; |
---|
| 1260 | default: |
---|
| 1261 | break; |
---|
| 1262 | } |
---|
| 1263 | glActiveTextureARB( GL_TEXTURE0 ); |
---|
| 1264 | } |
---|
| 1265 | //----------------------------------------------------------------------------- |
---|
| 1266 | GLint GLRenderSystem::getTextureAddressingMode( |
---|
| 1267 | TextureUnitState::TextureAddressingMode tam) const |
---|
| 1268 | { |
---|
| 1269 | switch(tam) |
---|
| 1270 | { |
---|
| 1271 | default: |
---|
| 1272 | case TextureUnitState::TAM_WRAP: |
---|
| 1273 | return GL_REPEAT; |
---|
| 1274 | case TextureUnitState::TAM_MIRROR: |
---|
| 1275 | return GL_MIRRORED_REPEAT; |
---|
| 1276 | case TextureUnitState::TAM_CLAMP: |
---|
| 1277 | return GL_CLAMP_TO_EDGE; |
---|
| 1278 | case TextureUnitState::TAM_BORDER: |
---|
| 1279 | return GL_CLAMP_TO_BORDER; |
---|
| 1280 | } |
---|
| 1281 | |
---|
| 1282 | } |
---|
| 1283 | //----------------------------------------------------------------------------- |
---|
| 1284 | void GLRenderSystem::_setTextureAddressingMode(size_t stage, const TextureUnitState::UVWAddressingMode& uvw) |
---|
| 1285 | { |
---|
| 1286 | glActiveTextureARB( GL_TEXTURE0 + stage ); |
---|
| 1287 | glTexParameteri( mTextureTypes[stage], GL_TEXTURE_WRAP_S, |
---|
| 1288 | getTextureAddressingMode(uvw.u)); |
---|
| 1289 | glTexParameteri( mTextureTypes[stage], GL_TEXTURE_WRAP_T, |
---|
| 1290 | getTextureAddressingMode(uvw.v)); |
---|
| 1291 | glTexParameteri( mTextureTypes[stage], GL_TEXTURE_WRAP_R, |
---|
| 1292 | getTextureAddressingMode(uvw.w)); |
---|
| 1293 | glActiveTextureARB( GL_TEXTURE0 ); |
---|
| 1294 | } |
---|
| 1295 | //----------------------------------------------------------------------------- |
---|
| 1296 | void GLRenderSystem::_setTextureBorderColour(size_t stage, const ColourValue& colour) |
---|
| 1297 | { |
---|
| 1298 | GLfloat border[4] = { colour.r, colour.g, colour.b, colour.a }; |
---|
| 1299 | glActiveTextureARB( GL_TEXTURE0 + stage ); |
---|
| 1300 | glTexParameterfv( mTextureTypes[stage], GL_TEXTURE_BORDER_COLOR, border); |
---|
| 1301 | glActiveTextureARB( GL_TEXTURE0 ); |
---|
| 1302 | } |
---|
| 1303 | //----------------------------------------------------------------------------- |
---|
| 1304 | void GLRenderSystem::_setTextureMipmapBias(size_t stage, float bias) |
---|
| 1305 | { |
---|
| 1306 | if (mCapabilities->hasCapability(RSC_MIPMAP_LOD_BIAS)) |
---|
| 1307 | { |
---|
| 1308 | glActiveTextureARB( GL_TEXTURE0 + stage ); |
---|
| 1309 | glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, bias); |
---|
| 1310 | glActiveTextureARB( GL_TEXTURE0 ); |
---|
| 1311 | } |
---|
| 1312 | |
---|
| 1313 | } |
---|
| 1314 | //----------------------------------------------------------------------------- |
---|
| 1315 | void GLRenderSystem::_setTextureMatrix(size_t stage, const Matrix4& xform) |
---|
| 1316 | { |
---|
| 1317 | if (stage >= mFixedFunctionTextureUnits) |
---|
| 1318 | { |
---|
| 1319 | // Can't do this |
---|
| 1320 | return; |
---|
| 1321 | } |
---|
| 1322 | |
---|
| 1323 | GLfloat mat[16]; |
---|
| 1324 | makeGLMatrix(mat, xform); |
---|
| 1325 | |
---|
| 1326 | glActiveTextureARB(GL_TEXTURE0 + stage); |
---|
| 1327 | glMatrixMode(GL_TEXTURE); |
---|
| 1328 | |
---|
| 1329 | // Load this matrix in |
---|
| 1330 | glLoadMatrixf(mat); |
---|
| 1331 | |
---|
| 1332 | if (mUseAutoTextureMatrix) |
---|
| 1333 | { |
---|
| 1334 | // Concat auto matrix |
---|
| 1335 | glMultMatrixf(mAutoTextureMatrix); |
---|
| 1336 | } |
---|
| 1337 | |
---|
| 1338 | glMatrixMode(GL_MODELVIEW); |
---|
| 1339 | glActiveTextureARB(GL_TEXTURE0); |
---|
| 1340 | } |
---|
| 1341 | //----------------------------------------------------------------------------- |
---|
| 1342 | GLint GLRenderSystem::getBlendMode(SceneBlendFactor ogreBlend) const |
---|
| 1343 | { |
---|
| 1344 | switch(ogreBlend) |
---|
| 1345 | { |
---|
| 1346 | case SBF_ONE: |
---|
| 1347 | return GL_ONE; |
---|
| 1348 | case SBF_ZERO: |
---|
| 1349 | return GL_ZERO; |
---|
| 1350 | case SBF_DEST_COLOUR: |
---|
| 1351 | return GL_DST_COLOR; |
---|
| 1352 | case SBF_SOURCE_COLOUR: |
---|
| 1353 | return GL_SRC_COLOR; |
---|
| 1354 | case SBF_ONE_MINUS_DEST_COLOUR: |
---|
| 1355 | return GL_ONE_MINUS_DST_COLOR; |
---|
| 1356 | case SBF_ONE_MINUS_SOURCE_COLOUR: |
---|
| 1357 | return GL_ONE_MINUS_SRC_COLOR; |
---|
| 1358 | case SBF_DEST_ALPHA: |
---|
| 1359 | return GL_DST_ALPHA; |
---|
| 1360 | case SBF_SOURCE_ALPHA: |
---|
| 1361 | return GL_SRC_ALPHA; |
---|
| 1362 | case SBF_ONE_MINUS_DEST_ALPHA: |
---|
| 1363 | return GL_ONE_MINUS_DST_ALPHA; |
---|
| 1364 | case SBF_ONE_MINUS_SOURCE_ALPHA: |
---|
| 1365 | return GL_ONE_MINUS_SRC_ALPHA; |
---|
| 1366 | }; |
---|
| 1367 | // to keep compiler happy |
---|
| 1368 | return GL_ONE; |
---|
| 1369 | } |
---|
| 1370 | |
---|
| 1371 | void GLRenderSystem::_setSceneBlending(SceneBlendFactor sourceFactor, SceneBlendFactor destFactor) |
---|
| 1372 | { |
---|
| 1373 | GLint sourceBlend = getBlendMode(sourceFactor); |
---|
| 1374 | GLint destBlend = getBlendMode(destFactor); |
---|
| 1375 | if(sourceFactor == SBF_ONE && destFactor == SBF_ZERO) |
---|
| 1376 | { |
---|
| 1377 | glDisable(GL_BLEND); |
---|
| 1378 | } |
---|
| 1379 | else |
---|
| 1380 | { |
---|
| 1381 | glEnable(GL_BLEND); |
---|
| 1382 | glBlendFunc(sourceBlend, destBlend); |
---|
| 1383 | } |
---|
| 1384 | } |
---|
| 1385 | //----------------------------------------------------------------------------- |
---|
| 1386 | void GLRenderSystem::_setAlphaRejectSettings(CompareFunction func, unsigned char value) |
---|
| 1387 | { |
---|
| 1388 | if(func == CMPF_ALWAYS_PASS) |
---|
| 1389 | { |
---|
| 1390 | glDisable(GL_ALPHA_TEST); |
---|
| 1391 | } |
---|
| 1392 | else |
---|
| 1393 | { |
---|
| 1394 | glEnable(GL_ALPHA_TEST); |
---|
| 1395 | glAlphaFunc(convertCompareFunction(func), value / 255.0f); |
---|
| 1396 | } |
---|
| 1397 | } |
---|
| 1398 | //----------------------------------------------------------------------------- |
---|
| 1399 | void GLRenderSystem::_setViewport(Viewport *vp) |
---|
| 1400 | { |
---|
| 1401 | // Check if viewport is different |
---|
| 1402 | if (vp != mActiveViewport || vp->_isUpdated()) |
---|
| 1403 | { |
---|
| 1404 | RenderTarget* target; |
---|
| 1405 | target = vp->getTarget(); |
---|
| 1406 | _setRenderTarget(target); |
---|
| 1407 | mActiveViewport = vp; |
---|
| 1408 | |
---|
| 1409 | GLsizei x, y, w, h; |
---|
| 1410 | |
---|
| 1411 | // Calculate the "lower-left" corner of the viewport |
---|
| 1412 | w = vp->getActualWidth(); |
---|
| 1413 | h = vp->getActualHeight(); |
---|
| 1414 | x = vp->getActualLeft(); |
---|
| 1415 | y = vp->getActualTop(); |
---|
| 1416 | if (!target->requiresTextureFlipping()) |
---|
| 1417 | { |
---|
| 1418 | // Convert "upper-left" corner to "lower-left" |
---|
| 1419 | y = target->getHeight() - h - y; |
---|
| 1420 | } |
---|
| 1421 | glViewport(x, y, w, h); |
---|
| 1422 | |
---|
| 1423 | // Configure the viewport clipping |
---|
| 1424 | glScissor(x, y, w, h); |
---|
| 1425 | |
---|
| 1426 | vp->_clearUpdatedFlag(); |
---|
| 1427 | } |
---|
| 1428 | } |
---|
| 1429 | |
---|
| 1430 | void GLRenderSystem::setLights() |
---|
| 1431 | { |
---|
| 1432 | for (size_t i = 0; i < MAX_LIGHTS; ++i) |
---|
| 1433 | { |
---|
| 1434 | if (mLights[i] != NULL) |
---|
| 1435 | { |
---|
| 1436 | Light* lt = mLights[i]; |
---|
| 1437 | setGLLightPositionDirection(lt, GL_LIGHT0 + i); |
---|
| 1438 | } |
---|
| 1439 | } |
---|
| 1440 | } |
---|
| 1441 | |
---|
| 1442 | //----------------------------------------------------------------------------- |
---|
| 1443 | void GLRenderSystem::_beginFrame(void) |
---|
| 1444 | { |
---|
| 1445 | if (!mActiveViewport) |
---|
| 1446 | OGRE_EXCEPT(Exception::ERR_INVALID_STATE, |
---|
| 1447 | "Cannot begin frame - no viewport selected.", |
---|
| 1448 | "GLRenderSystem::_beginFrame"); |
---|
| 1449 | |
---|
| 1450 | // Activate the viewport clipping |
---|
| 1451 | glEnable(GL_SCISSOR_TEST); |
---|
| 1452 | } |
---|
| 1453 | |
---|
| 1454 | //----------------------------------------------------------------------------- |
---|
| 1455 | void GLRenderSystem::_endFrame(void) |
---|
| 1456 | { |
---|
| 1457 | // Deactivate the viewport clipping. |
---|
| 1458 | glDisable(GL_SCISSOR_TEST); |
---|
| 1459 | } |
---|
| 1460 | |
---|
| 1461 | //----------------------------------------------------------------------------- |
---|
| 1462 | void GLRenderSystem::_setCullingMode(CullingMode mode) |
---|
| 1463 | { |
---|
| 1464 | // NB: Because two-sided stencil API dependence of the front face, we must |
---|
| 1465 | // use the same 'winding' for the front face everywhere. As the OGRE default |
---|
| 1466 | // culling mode is clockwise, we also treat anticlockwise winding as front |
---|
| 1467 | // face for consistently. On the assumption that, we can't change the front |
---|
| 1468 | // face by glFrontFace anywhere. |
---|
| 1469 | |
---|
| 1470 | GLenum cullMode; |
---|
| 1471 | |
---|
| 1472 | switch( mode ) |
---|
| 1473 | { |
---|
| 1474 | case CULL_NONE: |
---|
| 1475 | glDisable( GL_CULL_FACE ); |
---|
| 1476 | return; |
---|
| 1477 | default: |
---|
| 1478 | case CULL_CLOCKWISE: |
---|
| 1479 | if (mActiveRenderTarget && |
---|
| 1480 | ((mActiveRenderTarget->requiresTextureFlipping() && !mInvertVertexWinding) || |
---|
| 1481 | (!mActiveRenderTarget->requiresTextureFlipping() && mInvertVertexWinding))) |
---|
| 1482 | { |
---|
| 1483 | cullMode = GL_FRONT; |
---|
| 1484 | } |
---|
| 1485 | else |
---|
| 1486 | { |
---|
| 1487 | cullMode = GL_BACK; |
---|
| 1488 | } |
---|
| 1489 | break; |
---|
| 1490 | case CULL_ANTICLOCKWISE: |
---|
| 1491 | if (mActiveRenderTarget && |
---|
| 1492 | ((mActiveRenderTarget->requiresTextureFlipping() && !mInvertVertexWinding) || |
---|
| 1493 | (!mActiveRenderTarget->requiresTextureFlipping() && mInvertVertexWinding))) |
---|
| 1494 | { |
---|
| 1495 | cullMode = GL_BACK; |
---|
| 1496 | } |
---|
| 1497 | else |
---|
| 1498 | { |
---|
| 1499 | cullMode = GL_FRONT; |
---|
| 1500 | } |
---|
| 1501 | break; |
---|
| 1502 | } |
---|
| 1503 | |
---|
| 1504 | glEnable( GL_CULL_FACE ); |
---|
| 1505 | glCullFace( cullMode ); |
---|
| 1506 | } |
---|
| 1507 | //----------------------------------------------------------------------------- |
---|
| 1508 | void GLRenderSystem::_setDepthBufferParams(bool depthTest, bool depthWrite, CompareFunction depthFunction) |
---|
| 1509 | { |
---|
| 1510 | _setDepthBufferCheckEnabled(depthTest); |
---|
| 1511 | _setDepthBufferWriteEnabled(depthWrite); |
---|
| 1512 | _setDepthBufferFunction(depthFunction); |
---|
| 1513 | } |
---|
| 1514 | //----------------------------------------------------------------------------- |
---|
| 1515 | void GLRenderSystem::_setDepthBufferCheckEnabled(bool enabled) |
---|
| 1516 | { |
---|
| 1517 | if (enabled) |
---|
| 1518 | { |
---|
| 1519 | glClearDepth(1.0f); |
---|
| 1520 | glEnable(GL_DEPTH_TEST); |
---|
| 1521 | } |
---|
| 1522 | else |
---|
| 1523 | { |
---|
| 1524 | glDisable(GL_DEPTH_TEST); |
---|
| 1525 | } |
---|
| 1526 | } |
---|
| 1527 | //----------------------------------------------------------------------------- |
---|
| 1528 | void GLRenderSystem::_setDepthBufferWriteEnabled(bool enabled) |
---|
| 1529 | { |
---|
| 1530 | GLboolean flag = enabled ? GL_TRUE : GL_FALSE; |
---|
| 1531 | glDepthMask( flag ); |
---|
| 1532 | // Store for reference in _beginFrame |
---|
| 1533 | mDepthWrite = enabled; |
---|
| 1534 | } |
---|
| 1535 | //----------------------------------------------------------------------------- |
---|
| 1536 | void GLRenderSystem::_setDepthBufferFunction(CompareFunction func) |
---|
| 1537 | { |
---|
| 1538 | glDepthFunc(convertCompareFunction(func)); |
---|
| 1539 | } |
---|
| 1540 | //----------------------------------------------------------------------------- |
---|
| 1541 | void GLRenderSystem::_setDepthBias(float constantBias, float slopeScaleBias) |
---|
| 1542 | { |
---|
| 1543 | if (constantBias != 0 || slopeScaleBias != 0) |
---|
| 1544 | { |
---|
| 1545 | glEnable(GL_POLYGON_OFFSET_FILL); |
---|
| 1546 | glEnable(GL_POLYGON_OFFSET_POINT); |
---|
| 1547 | glEnable(GL_POLYGON_OFFSET_LINE); |
---|
| 1548 | glPolygonOffset(-slopeScaleBias, -constantBias); |
---|
| 1549 | } |
---|
| 1550 | else |
---|
| 1551 | { |
---|
| 1552 | glDisable(GL_POLYGON_OFFSET_FILL); |
---|
| 1553 | glDisable(GL_POLYGON_OFFSET_POINT); |
---|
| 1554 | glDisable(GL_POLYGON_OFFSET_LINE); |
---|
| 1555 | } |
---|
| 1556 | } |
---|
| 1557 | //----------------------------------------------------------------------------- |
---|
| 1558 | void GLRenderSystem::_setColourBufferWriteEnabled(bool red, bool green, bool blue, bool alpha) |
---|
| 1559 | { |
---|
| 1560 | glColorMask(red, green, blue, alpha); |
---|
| 1561 | // record this |
---|
| 1562 | mColourWrite[0] = red; |
---|
| 1563 | mColourWrite[1] = blue; |
---|
| 1564 | mColourWrite[2] = green; |
---|
| 1565 | mColourWrite[3] = alpha; |
---|
| 1566 | } |
---|
| 1567 | //----------------------------------------------------------------------------- |
---|
| 1568 | String GLRenderSystem::getErrorDescription(long errCode) const |
---|
| 1569 | { |
---|
| 1570 | const GLubyte *errString = gluErrorString (errCode); |
---|
| 1571 | return String((const char*) errString); |
---|
| 1572 | } |
---|
| 1573 | //----------------------------------------------------------------------------- |
---|
| 1574 | void GLRenderSystem::setLightingEnabled(bool enabled) |
---|
| 1575 | { |
---|
| 1576 | if (enabled) |
---|
| 1577 | { |
---|
| 1578 | glEnable(GL_LIGHTING); |
---|
| 1579 | } |
---|
| 1580 | else |
---|
| 1581 | { |
---|
| 1582 | glDisable(GL_LIGHTING); |
---|
| 1583 | } |
---|
| 1584 | } |
---|
| 1585 | //----------------------------------------------------------------------------- |
---|
| 1586 | void GLRenderSystem::_setFog(FogMode mode, const ColourValue& colour, Real density, Real start, Real end) |
---|
| 1587 | { |
---|
| 1588 | |
---|
| 1589 | GLint fogMode; |
---|
| 1590 | switch (mode) |
---|
| 1591 | { |
---|
| 1592 | case FOG_EXP: |
---|
| 1593 | fogMode = GL_EXP; |
---|
| 1594 | break; |
---|
| 1595 | case FOG_EXP2: |
---|
| 1596 | fogMode = GL_EXP2; |
---|
| 1597 | break; |
---|
| 1598 | case FOG_LINEAR: |
---|
| 1599 | fogMode = GL_LINEAR; |
---|
| 1600 | break; |
---|
| 1601 | default: |
---|
| 1602 | // Give up on it |
---|
| 1603 | glDisable(GL_FOG); |
---|
| 1604 | return; |
---|
| 1605 | } |
---|
| 1606 | |
---|
| 1607 | glEnable(GL_FOG); |
---|
| 1608 | glFogi(GL_FOG_MODE, fogMode); |
---|
| 1609 | GLfloat fogColor[4] = {colour.r, colour.g, colour.b, colour.a}; |
---|
| 1610 | glFogfv(GL_FOG_COLOR, fogColor); |
---|
| 1611 | glFogf(GL_FOG_DENSITY, density); |
---|
| 1612 | glFogf(GL_FOG_START, start); |
---|
| 1613 | glFogf(GL_FOG_END, end); |
---|
| 1614 | // XXX Hint here? |
---|
| 1615 | } |
---|
| 1616 | |
---|
| 1617 | VertexElementType GLRenderSystem::getColourVertexElementType(void) const |
---|
| 1618 | { |
---|
| 1619 | return VET_COLOUR_ABGR; |
---|
| 1620 | } |
---|
| 1621 | |
---|
| 1622 | void GLRenderSystem::_convertProjectionMatrix(const Matrix4& matrix, |
---|
| 1623 | Matrix4& dest, bool forGpuProgram) |
---|
| 1624 | { |
---|
| 1625 | // no any convertion request for OpenGL |
---|
| 1626 | dest = matrix; |
---|
| 1627 | } |
---|
| 1628 | |
---|
| 1629 | void GLRenderSystem::_makeProjectionMatrix(const Radian& fovy, Real aspect, Real nearPlane, |
---|
| 1630 | Real farPlane, Matrix4& dest, bool forGpuProgram) |
---|
| 1631 | { |
---|
| 1632 | Radian thetaY ( fovy / 2.0f ); |
---|
| 1633 | Real tanThetaY = Math::Tan(thetaY); |
---|
| 1634 | //Real thetaX = thetaY * aspect; |
---|
| 1635 | //Real tanThetaX = Math::Tan(thetaX); |
---|
| 1636 | |
---|
| 1637 | // Calc matrix elements |
---|
| 1638 | Real w = (1.0f / tanThetaY) / aspect; |
---|
| 1639 | Real h = 1.0f / tanThetaY; |
---|
| 1640 | Real q, qn; |
---|
| 1641 | if (farPlane == 0) |
---|
| 1642 | { |
---|
| 1643 | // Infinite far plane |
---|
| 1644 | q = Frustum::INFINITE_FAR_PLANE_ADJUST - 1; |
---|
| 1645 | qn = nearPlane * (Frustum::INFINITE_FAR_PLANE_ADJUST - 2); |
---|
| 1646 | } |
---|
| 1647 | else |
---|
| 1648 | { |
---|
| 1649 | q = -(farPlane + nearPlane) / (farPlane - nearPlane); |
---|
| 1650 | qn = -2 * (farPlane * nearPlane) / (farPlane - nearPlane); |
---|
| 1651 | } |
---|
| 1652 | |
---|
| 1653 | // NB This creates Z in range [-1,1] |
---|
| 1654 | // |
---|
| 1655 | // [ w 0 0 0 ] |
---|
| 1656 | // [ 0 h 0 0 ] |
---|
| 1657 | // [ 0 0 q qn ] |
---|
| 1658 | // [ 0 0 -1 0 ] |
---|
| 1659 | |
---|
| 1660 | dest = Matrix4::ZERO; |
---|
| 1661 | dest[0][0] = w; |
---|
| 1662 | dest[1][1] = h; |
---|
| 1663 | dest[2][2] = q; |
---|
| 1664 | dest[2][3] = qn; |
---|
| 1665 | dest[3][2] = -1; |
---|
| 1666 | |
---|
| 1667 | } |
---|
| 1668 | |
---|
| 1669 | void GLRenderSystem::_makeOrthoMatrix(const Radian& fovy, Real aspect, Real nearPlane, |
---|
| 1670 | Real farPlane, Matrix4& dest, bool forGpuProgram) |
---|
| 1671 | { |
---|
| 1672 | Radian thetaY (fovy / 2.0f); |
---|
| 1673 | Real tanThetaY = Math::Tan(thetaY); |
---|
| 1674 | |
---|
| 1675 | //Real thetaX = thetaY * aspect; |
---|
| 1676 | Real tanThetaX = tanThetaY * aspect; //Math::Tan(thetaX); |
---|
| 1677 | Real half_w = tanThetaX * nearPlane; |
---|
| 1678 | Real half_h = tanThetaY * nearPlane; |
---|
| 1679 | Real iw = 1.0 / half_w; |
---|
| 1680 | Real ih = 1.0 / half_h; |
---|
| 1681 | Real q; |
---|
| 1682 | if (farPlane == 0) |
---|
| 1683 | { |
---|
| 1684 | q = 0; |
---|
| 1685 | } |
---|
| 1686 | else |
---|
| 1687 | { |
---|
| 1688 | q = 2.0 / (farPlane - nearPlane); |
---|
| 1689 | } |
---|
| 1690 | dest = Matrix4::ZERO; |
---|
| 1691 | dest[0][0] = iw; |
---|
| 1692 | dest[1][1] = ih; |
---|
| 1693 | dest[2][2] = -q; |
---|
| 1694 | dest[2][3] = - (farPlane + nearPlane)/(farPlane - nearPlane); |
---|
| 1695 | dest[3][3] = 1; |
---|
| 1696 | } |
---|
| 1697 | |
---|
| 1698 | void GLRenderSystem::_setPolygonMode(PolygonMode level) |
---|
| 1699 | { |
---|
| 1700 | GLenum glmode; |
---|
| 1701 | switch(level) |
---|
| 1702 | { |
---|
| 1703 | case PM_POINTS: |
---|
| 1704 | glmode = GL_POINT; |
---|
| 1705 | break; |
---|
| 1706 | case PM_WIREFRAME: |
---|
| 1707 | glmode = GL_LINE; |
---|
| 1708 | break; |
---|
| 1709 | default: |
---|
| 1710 | case PM_SOLID: |
---|
| 1711 | glmode = GL_FILL; |
---|
| 1712 | break; |
---|
| 1713 | } |
---|
| 1714 | glPolygonMode(GL_FRONT_AND_BACK, glmode); |
---|
| 1715 | } |
---|
| 1716 | //--------------------------------------------------------------------- |
---|
| 1717 | void GLRenderSystem::setStencilCheckEnabled(bool enabled) |
---|
| 1718 | { |
---|
| 1719 | if (enabled) |
---|
| 1720 | { |
---|
| 1721 | glEnable(GL_STENCIL_TEST); |
---|
| 1722 | } |
---|
| 1723 | else |
---|
| 1724 | { |
---|
| 1725 | glDisable(GL_STENCIL_TEST); |
---|
| 1726 | } |
---|
| 1727 | } |
---|
| 1728 | //--------------------------------------------------------------------- |
---|
| 1729 | void GLRenderSystem::setStencilBufferParams(CompareFunction func, |
---|
| 1730 | uint32 refValue, uint32 mask, StencilOperation stencilFailOp, |
---|
| 1731 | StencilOperation depthFailOp, StencilOperation passOp, |
---|
| 1732 | bool twoSidedOperation) |
---|
| 1733 | { |
---|
| 1734 | bool flip; |
---|
| 1735 | mStencilMask = mask; |
---|
| 1736 | |
---|
| 1737 | if (twoSidedOperation) |
---|
| 1738 | { |
---|
| 1739 | if (!mCapabilities->hasCapability(RSC_TWO_SIDED_STENCIL)) |
---|
| 1740 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "2-sided stencils are not supported", |
---|
| 1741 | "GLRenderSystem::setStencilBufferParams"); |
---|
| 1742 | |
---|
| 1743 | // NB: We should always treat CCW as front face for consistent with default |
---|
| 1744 | // culling mode. Therefore, we must take care with two-sided stencil settings. |
---|
| 1745 | flip = (mInvertVertexWinding && !mActiveRenderTarget->requiresTextureFlipping()) || |
---|
| 1746 | (!mInvertVertexWinding && mActiveRenderTarget->requiresTextureFlipping()); |
---|
| 1747 | if(GLEW_VERSION_2_0) // New GL2 commands |
---|
| 1748 | { |
---|
| 1749 | // Back |
---|
| 1750 | glStencilMaskSeparate(GL_BACK, mask); |
---|
| 1751 | glStencilFuncSeparate(GL_BACK, convertCompareFunction(func), refValue, mask); |
---|
| 1752 | glStencilOpSeparate(GL_BACK, |
---|
| 1753 | convertStencilOp(stencilFailOp, !flip), |
---|
| 1754 | convertStencilOp(depthFailOp, !flip), |
---|
| 1755 | convertStencilOp(passOp, !flip)); |
---|
| 1756 | // Front |
---|
| 1757 | glStencilMaskSeparate(GL_FRONT, mask); |
---|
| 1758 | glStencilFuncSeparate(GL_FRONT, convertCompareFunction(func), refValue, mask); |
---|
| 1759 | glStencilOpSeparate(GL_FRONT, |
---|
| 1760 | convertStencilOp(stencilFailOp, flip), |
---|
| 1761 | convertStencilOp(depthFailOp, flip), |
---|
| 1762 | convertStencilOp(passOp, flip)); |
---|
| 1763 | } |
---|
| 1764 | else // EXT_stencil_two_side |
---|
| 1765 | { |
---|
| 1766 | glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT); |
---|
| 1767 | // Back |
---|
| 1768 | glActiveStencilFaceEXT(GL_BACK); |
---|
| 1769 | glStencilMask(mask); |
---|
| 1770 | glStencilFunc(convertCompareFunction(func), refValue, mask); |
---|
| 1771 | glStencilOp( |
---|
| 1772 | convertStencilOp(stencilFailOp, !flip), |
---|
| 1773 | convertStencilOp(depthFailOp, !flip), |
---|
| 1774 | convertStencilOp(passOp, !flip)); |
---|
| 1775 | // Front |
---|
| 1776 | glActiveStencilFaceEXT(GL_FRONT); |
---|
| 1777 | glStencilMask(mask); |
---|
| 1778 | glStencilFunc(convertCompareFunction(func), refValue, mask); |
---|
| 1779 | glStencilOp( |
---|
| 1780 | convertStencilOp(stencilFailOp, flip), |
---|
| 1781 | convertStencilOp(depthFailOp, flip), |
---|
| 1782 | convertStencilOp(passOp, flip)); |
---|
| 1783 | } |
---|
| 1784 | } |
---|
| 1785 | else |
---|
| 1786 | { |
---|
| 1787 | glDisable(GL_STENCIL_TEST_TWO_SIDE_EXT); |
---|
| 1788 | flip = false; |
---|
| 1789 | glStencilMask(mask); |
---|
| 1790 | glStencilFunc(convertCompareFunction(func), refValue, mask); |
---|
| 1791 | glStencilOp( |
---|
| 1792 | convertStencilOp(stencilFailOp, flip), |
---|
| 1793 | convertStencilOp(depthFailOp, flip), |
---|
| 1794 | convertStencilOp(passOp, flip)); |
---|
| 1795 | } |
---|
| 1796 | } |
---|
| 1797 | //--------------------------------------------------------------------- |
---|
| 1798 | GLint GLRenderSystem::convertCompareFunction(CompareFunction func) const |
---|
| 1799 | { |
---|
| 1800 | switch(func) |
---|
| 1801 | { |
---|
| 1802 | case CMPF_ALWAYS_FAIL: |
---|
| 1803 | return GL_NEVER; |
---|
| 1804 | case CMPF_ALWAYS_PASS: |
---|
| 1805 | return GL_ALWAYS; |
---|
| 1806 | case CMPF_LESS: |
---|
| 1807 | return GL_LESS; |
---|
| 1808 | case CMPF_LESS_EQUAL: |
---|
| 1809 | return GL_LEQUAL; |
---|
| 1810 | case CMPF_EQUAL: |
---|
| 1811 | return GL_EQUAL; |
---|
| 1812 | case CMPF_NOT_EQUAL: |
---|
| 1813 | return GL_NOTEQUAL; |
---|
| 1814 | case CMPF_GREATER_EQUAL: |
---|
| 1815 | return GL_GEQUAL; |
---|
| 1816 | case CMPF_GREATER: |
---|
| 1817 | return GL_GREATER; |
---|
| 1818 | }; |
---|
| 1819 | // to keep compiler happy |
---|
| 1820 | return GL_ALWAYS; |
---|
| 1821 | } |
---|
| 1822 | //--------------------------------------------------------------------- |
---|
| 1823 | GLint GLRenderSystem::convertStencilOp(StencilOperation op, bool invert) const |
---|
| 1824 | { |
---|
| 1825 | switch(op) |
---|
| 1826 | { |
---|
| 1827 | case SOP_KEEP: |
---|
| 1828 | return GL_KEEP; |
---|
| 1829 | case SOP_ZERO: |
---|
| 1830 | return GL_ZERO; |
---|
| 1831 | case SOP_REPLACE: |
---|
| 1832 | return GL_REPLACE; |
---|
| 1833 | case SOP_INCREMENT: |
---|
| 1834 | return invert ? GL_DECR : GL_INCR; |
---|
| 1835 | case SOP_DECREMENT: |
---|
| 1836 | return invert ? GL_INCR : GL_DECR; |
---|
| 1837 | case SOP_INCREMENT_WRAP: |
---|
| 1838 | return invert ? GL_DECR_WRAP_EXT : GL_INCR_WRAP_EXT; |
---|
| 1839 | case SOP_DECREMENT_WRAP: |
---|
| 1840 | return invert ? GL_INCR_WRAP_EXT : GL_DECR_WRAP_EXT; |
---|
| 1841 | case SOP_INVERT: |
---|
| 1842 | return GL_INVERT; |
---|
| 1843 | }; |
---|
| 1844 | // to keep compiler happy |
---|
| 1845 | return SOP_KEEP; |
---|
| 1846 | } |
---|
| 1847 | //--------------------------------------------------------------------- |
---|
| 1848 | GLuint GLRenderSystem::getCombinedMinMipFilter(void) const |
---|
| 1849 | { |
---|
| 1850 | switch(mMinFilter) |
---|
| 1851 | { |
---|
| 1852 | case FO_ANISOTROPIC: |
---|
| 1853 | case FO_LINEAR: |
---|
| 1854 | switch(mMipFilter) |
---|
| 1855 | { |
---|
| 1856 | case FO_ANISOTROPIC: |
---|
| 1857 | case FO_LINEAR: |
---|
| 1858 | // linear min, linear mip |
---|
| 1859 | return GL_LINEAR_MIPMAP_LINEAR; |
---|
| 1860 | case FO_POINT: |
---|
| 1861 | // linear min, point mip |
---|
| 1862 | return GL_LINEAR_MIPMAP_NEAREST; |
---|
| 1863 | case FO_NONE: |
---|
| 1864 | // linear min, no mip |
---|
| 1865 | return GL_LINEAR; |
---|
| 1866 | } |
---|
| 1867 | break; |
---|
| 1868 | case FO_POINT: |
---|
| 1869 | case FO_NONE: |
---|
| 1870 | switch(mMipFilter) |
---|
| 1871 | { |
---|
| 1872 | case FO_ANISOTROPIC: |
---|
| 1873 | case FO_LINEAR: |
---|
| 1874 | // nearest min, linear mip |
---|
| 1875 | return GL_NEAREST_MIPMAP_LINEAR; |
---|
| 1876 | case FO_POINT: |
---|
| 1877 | // nearest min, point mip |
---|
| 1878 | return GL_NEAREST_MIPMAP_NEAREST; |
---|
| 1879 | case FO_NONE: |
---|
| 1880 | // nearest min, no mip |
---|
| 1881 | return GL_NEAREST; |
---|
| 1882 | } |
---|
| 1883 | break; |
---|
| 1884 | } |
---|
| 1885 | |
---|
| 1886 | // should never get here |
---|
| 1887 | return 0; |
---|
| 1888 | |
---|
| 1889 | } |
---|
| 1890 | //--------------------------------------------------------------------- |
---|
| 1891 | void GLRenderSystem::_setTextureUnitFiltering(size_t unit, |
---|
| 1892 | FilterType ftype, FilterOptions fo) |
---|
| 1893 | { |
---|
| 1894 | glActiveTextureARB( GL_TEXTURE0 + unit ); |
---|
| 1895 | switch(ftype) |
---|
| 1896 | { |
---|
| 1897 | case FT_MIN: |
---|
| 1898 | mMinFilter = fo; |
---|
| 1899 | // Combine with existing mip filter |
---|
| 1900 | glTexParameteri( |
---|
| 1901 | mTextureTypes[unit], |
---|
| 1902 | GL_TEXTURE_MIN_FILTER, |
---|
| 1903 | getCombinedMinMipFilter()); |
---|
| 1904 | break; |
---|
| 1905 | case FT_MAG: |
---|
| 1906 | switch (fo) |
---|
| 1907 | { |
---|
| 1908 | case FO_ANISOTROPIC: // GL treats linear and aniso the same |
---|
| 1909 | case FO_LINEAR: |
---|
| 1910 | glTexParameteri( |
---|
| 1911 | mTextureTypes[unit], |
---|
| 1912 | GL_TEXTURE_MAG_FILTER, |
---|
| 1913 | GL_LINEAR); |
---|
| 1914 | break; |
---|
| 1915 | case FO_POINT: |
---|
| 1916 | case FO_NONE: |
---|
| 1917 | glTexParameteri( |
---|
| 1918 | mTextureTypes[unit], |
---|
| 1919 | GL_TEXTURE_MAG_FILTER, |
---|
| 1920 | GL_NEAREST); |
---|
| 1921 | break; |
---|
| 1922 | } |
---|
| 1923 | break; |
---|
| 1924 | case FT_MIP: |
---|
| 1925 | mMipFilter = fo; |
---|
| 1926 | // Combine with existing min filter |
---|
| 1927 | glTexParameteri( |
---|
| 1928 | mTextureTypes[unit], |
---|
| 1929 | GL_TEXTURE_MIN_FILTER, |
---|
| 1930 | getCombinedMinMipFilter()); |
---|
| 1931 | break; |
---|
| 1932 | } |
---|
| 1933 | |
---|
| 1934 | glActiveTextureARB( GL_TEXTURE0 ); |
---|
| 1935 | } |
---|
| 1936 | //--------------------------------------------------------------------- |
---|
| 1937 | GLfloat GLRenderSystem::_getCurrentAnisotropy(size_t unit) |
---|
| 1938 | { |
---|
| 1939 | GLfloat curAniso = 0; |
---|
| 1940 | glGetTexParameterfv(mTextureTypes[unit], |
---|
| 1941 | GL_TEXTURE_MAX_ANISOTROPY_EXT, &curAniso); |
---|
| 1942 | return curAniso ? curAniso : 1; |
---|
| 1943 | } |
---|
| 1944 | //--------------------------------------------------------------------- |
---|
| 1945 | void GLRenderSystem::_setTextureLayerAnisotropy(size_t unit, unsigned int maxAnisotropy) |
---|
| 1946 | { |
---|
| 1947 | if (!mCapabilities->hasCapability(RSC_ANISOTROPY)) |
---|
| 1948 | return; |
---|
| 1949 | |
---|
| 1950 | GLfloat largest_supported_anisotropy = 0; |
---|
| 1951 | glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &largest_supported_anisotropy); |
---|
| 1952 | if (maxAnisotropy > largest_supported_anisotropy) |
---|
| 1953 | maxAnisotropy = largest_supported_anisotropy ? |
---|
| 1954 | static_cast<uint>(largest_supported_anisotropy) : 1; |
---|
| 1955 | if (_getCurrentAnisotropy(unit) != maxAnisotropy) |
---|
| 1956 | glTexParameterf(mTextureTypes[unit], GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy); |
---|
| 1957 | } |
---|
| 1958 | //----------------------------------------------------------------------------- |
---|
| 1959 | void GLRenderSystem::_setTextureBlendMode(size_t stage, const LayerBlendModeEx& bm) |
---|
| 1960 | { |
---|
| 1961 | if (stage >= mFixedFunctionTextureUnits) |
---|
| 1962 | { |
---|
| 1963 | // Can't do this |
---|
| 1964 | return; |
---|
| 1965 | } |
---|
| 1966 | |
---|
| 1967 | // Check to see if blending is supported |
---|
| 1968 | if(!mCapabilities->hasCapability(RSC_BLENDING)) |
---|
| 1969 | return; |
---|
| 1970 | |
---|
| 1971 | GLenum src1op, src2op, cmd; |
---|
| 1972 | GLfloat cv1[4], cv2[4]; |
---|
| 1973 | |
---|
| 1974 | if (bm.blendType == LBT_COLOUR) |
---|
| 1975 | { |
---|
| 1976 | cv1[0] = bm.colourArg1.r; |
---|
| 1977 | cv1[1] = bm.colourArg1.g; |
---|
| 1978 | cv1[2] = bm.colourArg1.b; |
---|
| 1979 | cv1[3] = bm.colourArg1.a; |
---|
| 1980 | mManualBlendColours[stage][0] = bm.colourArg1; |
---|
| 1981 | |
---|
| 1982 | |
---|
| 1983 | cv2[0] = bm.colourArg2.r; |
---|
| 1984 | cv2[1] = bm.colourArg2.g; |
---|
| 1985 | cv2[2] = bm.colourArg2.b; |
---|
| 1986 | cv2[3] = bm.colourArg2.a; |
---|
| 1987 | mManualBlendColours[stage][1] = bm.colourArg2; |
---|
| 1988 | } |
---|
| 1989 | |
---|
| 1990 | if (bm.blendType == LBT_ALPHA) |
---|
| 1991 | { |
---|
| 1992 | cv1[0] = mManualBlendColours[stage][0].r; |
---|
| 1993 | cv1[1] = mManualBlendColours[stage][0].g; |
---|
| 1994 | cv1[2] = mManualBlendColours[stage][0].b; |
---|
| 1995 | cv1[3] = bm.alphaArg1; |
---|
| 1996 | |
---|
| 1997 | cv2[0] = mManualBlendColours[stage][1].r; |
---|
| 1998 | cv2[1] = mManualBlendColours[stage][1].g; |
---|
| 1999 | cv2[2] = mManualBlendColours[stage][1].b; |
---|
| 2000 | cv2[3] = bm.alphaArg2; |
---|
| 2001 | } |
---|
| 2002 | |
---|
| 2003 | switch (bm.source1) |
---|
| 2004 | { |
---|
| 2005 | case LBS_CURRENT: |
---|
| 2006 | src1op = GL_PREVIOUS; |
---|
| 2007 | break; |
---|
| 2008 | case LBS_TEXTURE: |
---|
| 2009 | src1op = GL_TEXTURE; |
---|
| 2010 | break; |
---|
| 2011 | case LBS_MANUAL: |
---|
| 2012 | src1op = GL_CONSTANT; |
---|
| 2013 | break; |
---|
| 2014 | case LBS_DIFFUSE: |
---|
| 2015 | src1op = GL_PRIMARY_COLOR; |
---|
| 2016 | break; |
---|
| 2017 | // XXX |
---|
| 2018 | case LBS_SPECULAR: |
---|
| 2019 | src1op = GL_PRIMARY_COLOR; |
---|
| 2020 | break; |
---|
| 2021 | default: |
---|
| 2022 | src1op = 0; |
---|
| 2023 | } |
---|
| 2024 | |
---|
| 2025 | switch (bm.source2) |
---|
| 2026 | { |
---|
| 2027 | case LBS_CURRENT: |
---|
| 2028 | src2op = GL_PREVIOUS; |
---|
| 2029 | break; |
---|
| 2030 | case LBS_TEXTURE: |
---|
| 2031 | src2op = GL_TEXTURE; |
---|
| 2032 | break; |
---|
| 2033 | case LBS_MANUAL: |
---|
| 2034 | src2op = GL_CONSTANT; |
---|
| 2035 | break; |
---|
| 2036 | case LBS_DIFFUSE: |
---|
| 2037 | src2op = GL_PRIMARY_COLOR; |
---|
| 2038 | break; |
---|
| 2039 | // XXX |
---|
| 2040 | case LBS_SPECULAR: |
---|
| 2041 | src2op = GL_PRIMARY_COLOR; |
---|
| 2042 | break; |
---|
| 2043 | default: |
---|
| 2044 | src2op = 0; |
---|
| 2045 | } |
---|
| 2046 | |
---|
| 2047 | switch (bm.operation) |
---|
| 2048 | { |
---|
| 2049 | case LBX_SOURCE1: |
---|
| 2050 | cmd = GL_REPLACE; |
---|
| 2051 | break; |
---|
| 2052 | case LBX_SOURCE2: |
---|
| 2053 | cmd = GL_REPLACE; |
---|
| 2054 | break; |
---|
| 2055 | case LBX_MODULATE: |
---|
| 2056 | cmd = GL_MODULATE; |
---|
| 2057 | break; |
---|
| 2058 | case LBX_MODULATE_X2: |
---|
| 2059 | cmd = GL_MODULATE; |
---|
| 2060 | break; |
---|
| 2061 | case LBX_MODULATE_X4: |
---|
| 2062 | cmd = GL_MODULATE; |
---|
| 2063 | break; |
---|
| 2064 | case LBX_ADD: |
---|
| 2065 | cmd = GL_ADD; |
---|
| 2066 | break; |
---|
| 2067 | case LBX_ADD_SIGNED: |
---|
| 2068 | cmd = GL_ADD_SIGNED; |
---|
| 2069 | break; |
---|
| 2070 | case LBX_ADD_SMOOTH: |
---|
| 2071 | cmd = GL_INTERPOLATE; |
---|
| 2072 | break; |
---|
| 2073 | case LBX_SUBTRACT: |
---|
| 2074 | cmd = GL_SUBTRACT; |
---|
| 2075 | break; |
---|
| 2076 | case LBX_BLEND_DIFFUSE_COLOUR: |
---|
| 2077 | cmd = GL_INTERPOLATE; |
---|
| 2078 | break; |
---|
| 2079 | case LBX_BLEND_DIFFUSE_ALPHA: |
---|
| 2080 | cmd = GL_INTERPOLATE; |
---|
| 2081 | break; |
---|
| 2082 | case LBX_BLEND_TEXTURE_ALPHA: |
---|
| 2083 | cmd = GL_INTERPOLATE; |
---|
| 2084 | break; |
---|
| 2085 | case LBX_BLEND_CURRENT_ALPHA: |
---|
| 2086 | cmd = GL_INTERPOLATE; |
---|
| 2087 | break; |
---|
| 2088 | case LBX_BLEND_MANUAL: |
---|
| 2089 | cmd = GL_INTERPOLATE; |
---|
| 2090 | break; |
---|
| 2091 | case LBX_DOTPRODUCT: |
---|
| 2092 | cmd = mCapabilities->hasCapability(RSC_DOT3) |
---|
| 2093 | ? GL_DOT3_RGB : GL_MODULATE; |
---|
| 2094 | break; |
---|
| 2095 | default: |
---|
| 2096 | cmd = 0; |
---|
| 2097 | } |
---|
| 2098 | |
---|
| 2099 | glActiveTextureARB(GL_TEXTURE0 + stage); |
---|
| 2100 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE); |
---|
| 2101 | |
---|
| 2102 | if (bm.blendType == LBT_COLOUR) |
---|
| 2103 | { |
---|
| 2104 | glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, cmd); |
---|
| 2105 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB, src1op); |
---|
| 2106 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB, src2op); |
---|
| 2107 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_CONSTANT); |
---|
| 2108 | } |
---|
| 2109 | else |
---|
| 2110 | { |
---|
| 2111 | glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, cmd); |
---|
| 2112 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, src1op); |
---|
| 2113 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, src2op); |
---|
| 2114 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_CONSTANT); |
---|
| 2115 | } |
---|
| 2116 | |
---|
| 2117 | float blendValue[4] = {0, 0, 0, bm.factor}; |
---|
| 2118 | switch (bm.operation) |
---|
| 2119 | { |
---|
| 2120 | case LBX_BLEND_DIFFUSE_COLOUR: |
---|
| 2121 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_PRIMARY_COLOR); |
---|
| 2122 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_PRIMARY_COLOR); |
---|
| 2123 | break; |
---|
| 2124 | case LBX_BLEND_DIFFUSE_ALPHA: |
---|
| 2125 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_PRIMARY_COLOR); |
---|
| 2126 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_PRIMARY_COLOR); |
---|
| 2127 | break; |
---|
| 2128 | case LBX_BLEND_TEXTURE_ALPHA: |
---|
| 2129 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_TEXTURE); |
---|
| 2130 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_TEXTURE); |
---|
| 2131 | break; |
---|
| 2132 | case LBX_BLEND_CURRENT_ALPHA: |
---|
| 2133 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_PREVIOUS); |
---|
| 2134 | glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_PREVIOUS); |
---|
| 2135 | break; |
---|
| 2136 | case LBX_BLEND_MANUAL: |
---|
| 2137 | glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, blendValue); |
---|
| 2138 | break; |
---|
| 2139 | default: |
---|
| 2140 | break; |
---|
| 2141 | }; |
---|
| 2142 | |
---|
| 2143 | switch (bm.operation) |
---|
| 2144 | { |
---|
| 2145 | case LBX_MODULATE_X2: |
---|
| 2146 | glTexEnvi(GL_TEXTURE_ENV, bm.blendType == LBT_COLOUR ? |
---|
| 2147 | GL_RGB_SCALE : GL_ALPHA_SCALE, 2); |
---|
| 2148 | break; |
---|
| 2149 | case LBX_MODULATE_X4: |
---|
| 2150 | glTexEnvi(GL_TEXTURE_ENV, bm.blendType == LBT_COLOUR ? |
---|
| 2151 | GL_RGB_SCALE : GL_ALPHA_SCALE, 4); |
---|
| 2152 | break; |
---|
| 2153 | default: |
---|
| 2154 | glTexEnvi(GL_TEXTURE_ENV, bm.blendType == LBT_COLOUR ? |
---|
| 2155 | GL_RGB_SCALE : GL_ALPHA_SCALE, 1); |
---|
| 2156 | break; |
---|
| 2157 | } |
---|
| 2158 | |
---|
| 2159 | if (bm.blendType == LBT_COLOUR){ |
---|
| 2160 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR); |
---|
| 2161 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR); |
---|
| 2162 | if (bm.operation == LBX_BLEND_DIFFUSE_COLOUR){ |
---|
| 2163 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_COLOR); |
---|
| 2164 | } else { |
---|
| 2165 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA); |
---|
| 2166 | } |
---|
| 2167 | } |
---|
| 2168 | |
---|
| 2169 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA); |
---|
| 2170 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA); |
---|
| 2171 | glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA, GL_SRC_ALPHA); |
---|
| 2172 | if(bm.source1 == LBS_MANUAL) |
---|
| 2173 | glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, cv1); |
---|
| 2174 | if (bm.source2 == LBS_MANUAL) |
---|
| 2175 | glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, cv2); |
---|
| 2176 | |
---|
| 2177 | glActiveTextureARB(GL_TEXTURE0); |
---|
| 2178 | } |
---|
| 2179 | //--------------------------------------------------------------------- |
---|
| 2180 | void GLRenderSystem::setGLLightPositionDirection(Light* lt, GLenum lightindex) |
---|
| 2181 | { |
---|
| 2182 | // Set position / direction |
---|
| 2183 | Vector4 vec; |
---|
| 2184 | // Use general 4D vector which is the same as GL's approach |
---|
| 2185 | vec = lt->getAs4DVector(); |
---|
| 2186 | |
---|
| 2187 | #if OGRE_DOUBLE_PRECISION |
---|
| 2188 | // Must convert to float* |
---|
| 2189 | float tmp[4] = {vec.x, vec.y, vec.z, vec.w}; |
---|
| 2190 | glLightfv(lightindex, GL_POSITION, tmp); |
---|
| 2191 | #else |
---|
| 2192 | glLightfv(lightindex, GL_POSITION, vec.ptr()); |
---|
| 2193 | #endif |
---|
| 2194 | // Set spotlight direction |
---|
| 2195 | if (lt->getType() == Light::LT_SPOTLIGHT) |
---|
| 2196 | { |
---|
| 2197 | vec = lt->getDerivedDirection(); |
---|
| 2198 | vec.w = 0.0; |
---|
| 2199 | #if OGRE_DOUBLE_PRECISION |
---|
| 2200 | // Must convert to float* |
---|
| 2201 | float tmp2[4] = {vec.x, vec.y, vec.z, vec.w}; |
---|
| 2202 | glLightfv(lightindex, GL_SPOT_DIRECTION, tmp2); |
---|
| 2203 | #else |
---|
| 2204 | glLightfv(lightindex, GL_SPOT_DIRECTION, vec.ptr()); |
---|
| 2205 | #endif |
---|
| 2206 | } |
---|
| 2207 | } |
---|
| 2208 | //--------------------------------------------------------------------- |
---|
| 2209 | void GLRenderSystem::setVertexDeclaration(VertexDeclaration* decl) |
---|
| 2210 | { |
---|
| 2211 | } |
---|
| 2212 | //--------------------------------------------------------------------- |
---|
| 2213 | void GLRenderSystem::setVertexBufferBinding(VertexBufferBinding* binding) |
---|
| 2214 | { |
---|
| 2215 | } |
---|
| 2216 | //--------------------------------------------------------------------- |
---|
| 2217 | void GLRenderSystem::_render(const RenderOperation& op) |
---|
| 2218 | { |
---|
| 2219 | // Call super class |
---|
| 2220 | RenderSystem::_render(op); |
---|
| 2221 | |
---|
| 2222 | void* pBufferData = 0; |
---|
| 2223 | |
---|
| 2224 | const VertexDeclaration::VertexElementList& decl = |
---|
| 2225 | op.vertexData->vertexDeclaration->getElements(); |
---|
| 2226 | VertexDeclaration::VertexElementList::const_iterator elem, elemEnd; |
---|
| 2227 | elemEnd = decl.end(); |
---|
| 2228 | |
---|
| 2229 | for (elem = decl.begin(); elem != elemEnd; ++elem) |
---|
| 2230 | { |
---|
| 2231 | if (!op.vertexData->vertexBufferBinding->isBufferBound(elem->getSource())) |
---|
| 2232 | continue; // skip unbound elements |
---|
| 2233 | |
---|
| 2234 | HardwareVertexBufferSharedPtr vertexBuffer = |
---|
| 2235 | op.vertexData->vertexBufferBinding->getBuffer(elem->getSource()); |
---|
| 2236 | if(mCapabilities->hasCapability(RSC_VBO)) |
---|
| 2237 | { |
---|
| 2238 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, |
---|
| 2239 | static_cast<const GLHardwareVertexBuffer*>(vertexBuffer.get())->getGLBufferId()); |
---|
| 2240 | pBufferData = VBO_BUFFER_OFFSET(elem->getOffset()); |
---|
| 2241 | } |
---|
| 2242 | else |
---|
| 2243 | { |
---|
| 2244 | pBufferData = static_cast<const GLDefaultHardwareVertexBuffer*>(vertexBuffer.get())->getDataPtr(elem->getOffset()); |
---|
| 2245 | } |
---|
| 2246 | if (op.vertexData->vertexStart) |
---|
| 2247 | { |
---|
| 2248 | pBufferData = static_cast<char*>(pBufferData) + op.vertexData->vertexStart * vertexBuffer->getVertexSize(); |
---|
| 2249 | } |
---|
| 2250 | |
---|
| 2251 | unsigned int i = 0; |
---|
| 2252 | VertexElementSemantic sem = elem->getSemantic(); |
---|
| 2253 | switch(sem) |
---|
| 2254 | { |
---|
| 2255 | case VES_POSITION: |
---|
| 2256 | glVertexPointer(VertexElement::getTypeCount( |
---|
| 2257 | elem->getType()), |
---|
| 2258 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2259 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2260 | pBufferData); |
---|
| 2261 | glEnableClientState( GL_VERTEX_ARRAY ); |
---|
| 2262 | break; |
---|
| 2263 | case VES_NORMAL: |
---|
| 2264 | glNormalPointer( |
---|
| 2265 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2266 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2267 | pBufferData); |
---|
| 2268 | glEnableClientState( GL_NORMAL_ARRAY ); |
---|
| 2269 | break; |
---|
| 2270 | case VES_DIFFUSE: |
---|
| 2271 | glColorPointer(4, |
---|
| 2272 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2273 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2274 | pBufferData); |
---|
| 2275 | glEnableClientState( GL_COLOR_ARRAY ); |
---|
| 2276 | break; |
---|
| 2277 | case VES_SPECULAR: |
---|
| 2278 | if (GLEW_EXT_secondary_color) |
---|
| 2279 | { |
---|
| 2280 | glSecondaryColorPointerEXT(4, |
---|
| 2281 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2282 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2283 | pBufferData); |
---|
| 2284 | glEnableClientState( GL_SECONDARY_COLOR_ARRAY ); |
---|
| 2285 | } |
---|
| 2286 | break; |
---|
| 2287 | case VES_TEXTURE_COORDINATES: |
---|
| 2288 | |
---|
| 2289 | if (mCurrentVertexProgram) |
---|
| 2290 | { |
---|
| 2291 | // Programmable pipeline - direct UV assignment |
---|
| 2292 | glClientActiveTextureARB(GL_TEXTURE0 + elem->getIndex()); |
---|
| 2293 | glTexCoordPointer( |
---|
| 2294 | VertexElement::getTypeCount(elem->getType()), |
---|
| 2295 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2296 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2297 | pBufferData); |
---|
| 2298 | glEnableClientState( GL_TEXTURE_COORD_ARRAY ); |
---|
| 2299 | } |
---|
| 2300 | else |
---|
| 2301 | { |
---|
| 2302 | // fixed function matching to units based on tex_coord_set |
---|
| 2303 | for (i = 0; i < mDisabledTexUnitsFrom; i++) |
---|
| 2304 | { |
---|
| 2305 | // Only set this texture unit's texcoord pointer if it |
---|
| 2306 | // is supposed to be using this element's index |
---|
| 2307 | if (mTextureCoordIndex[i] == elem->getIndex()) |
---|
| 2308 | { |
---|
| 2309 | glClientActiveTextureARB(GL_TEXTURE0 + i); |
---|
| 2310 | glTexCoordPointer( |
---|
| 2311 | VertexElement::getTypeCount(elem->getType()), |
---|
| 2312 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2313 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2314 | pBufferData); |
---|
| 2315 | glEnableClientState( GL_TEXTURE_COORD_ARRAY ); |
---|
| 2316 | } |
---|
| 2317 | } |
---|
| 2318 | } |
---|
| 2319 | break; |
---|
| 2320 | case VES_BLEND_INDICES: |
---|
| 2321 | case VES_BLEND_WEIGHTS: |
---|
| 2322 | case VES_TANGENT: |
---|
| 2323 | case VES_BINORMAL: |
---|
| 2324 | if (mCurrentVertexProgram) |
---|
| 2325 | { |
---|
| 2326 | GLuint attrib = mCurrentVertexProgram->getAttributeIndex(sem); |
---|
| 2327 | glVertexAttribPointerARB( |
---|
| 2328 | attrib, |
---|
| 2329 | VertexElement::getTypeCount(elem->getType()), |
---|
| 2330 | GLHardwareBufferManager::getGLType(elem->getType()), |
---|
| 2331 | GL_FALSE, // normalisation disabled |
---|
| 2332 | static_cast<GLsizei>(vertexBuffer->getVertexSize()), |
---|
| 2333 | pBufferData); |
---|
| 2334 | glEnableVertexAttribArrayARB(attrib); |
---|
| 2335 | |
---|
| 2336 | } |
---|
| 2337 | break; |
---|
| 2338 | default: |
---|
| 2339 | break; |
---|
| 2340 | }; |
---|
| 2341 | |
---|
| 2342 | } |
---|
| 2343 | |
---|
| 2344 | glClientActiveTextureARB(GL_TEXTURE0); |
---|
| 2345 | |
---|
| 2346 | // Find the correct type to render |
---|
| 2347 | GLint primType; |
---|
| 2348 | switch (op.operationType) |
---|
| 2349 | { |
---|
| 2350 | case RenderOperation::OT_POINT_LIST: |
---|
| 2351 | primType = GL_POINTS; |
---|
| 2352 | break; |
---|
| 2353 | case RenderOperation::OT_LINE_LIST: |
---|
| 2354 | primType = GL_LINES; |
---|
| 2355 | break; |
---|
| 2356 | case RenderOperation::OT_LINE_STRIP: |
---|
| 2357 | primType = GL_LINE_STRIP; |
---|
| 2358 | break; |
---|
| 2359 | default: |
---|
| 2360 | case RenderOperation::OT_TRIANGLE_LIST: |
---|
| 2361 | primType = GL_TRIANGLES; |
---|
| 2362 | break; |
---|
| 2363 | case RenderOperation::OT_TRIANGLE_STRIP: |
---|
| 2364 | primType = GL_TRIANGLE_STRIP; |
---|
| 2365 | break; |
---|
| 2366 | case RenderOperation::OT_TRIANGLE_FAN: |
---|
| 2367 | primType = GL_TRIANGLE_FAN; |
---|
| 2368 | break; |
---|
| 2369 | } |
---|
| 2370 | |
---|
| 2371 | if (op.useIndexes) |
---|
| 2372 | { |
---|
| 2373 | if(mCapabilities->hasCapability(RSC_VBO)) |
---|
| 2374 | { |
---|
| 2375 | glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, |
---|
| 2376 | static_cast<GLHardwareIndexBuffer*>( |
---|
| 2377 | op.indexData->indexBuffer.get())->getGLBufferId()); |
---|
| 2378 | |
---|
| 2379 | pBufferData = VBO_BUFFER_OFFSET( |
---|
| 2380 | op.indexData->indexStart * op.indexData->indexBuffer->getIndexSize()); |
---|
| 2381 | } |
---|
| 2382 | else |
---|
| 2383 | { |
---|
| 2384 | pBufferData = static_cast<GLDefaultHardwareIndexBuffer*>( |
---|
| 2385 | op.indexData->indexBuffer.get())->getDataPtr( |
---|
| 2386 | op.indexData->indexStart * op.indexData->indexBuffer->getIndexSize()); |
---|
| 2387 | } |
---|
| 2388 | |
---|
| 2389 | GLenum indexType = (op.indexData->indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT) ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT; |
---|
| 2390 | |
---|
| 2391 | do |
---|
| 2392 | { |
---|
| 2393 | glDrawElements(primType, op.indexData->indexCount, indexType, pBufferData); |
---|
| 2394 | } while (updatePassIterationRenderState()); |
---|
| 2395 | |
---|
| 2396 | } |
---|
| 2397 | else |
---|
| 2398 | { |
---|
| 2399 | do |
---|
| 2400 | { |
---|
| 2401 | glDrawArrays(primType, 0, op.vertexData->vertexCount); |
---|
| 2402 | } while (updatePassIterationRenderState()); |
---|
| 2403 | } |
---|
| 2404 | |
---|
| 2405 | glDisableClientState( GL_VERTEX_ARRAY ); |
---|
| 2406 | for (int i = 0; i < OGRE_MAX_TEXTURE_COORD_SETS; i++) |
---|
| 2407 | { |
---|
| 2408 | glClientActiveTextureARB(GL_TEXTURE0 + i); |
---|
| 2409 | glDisableClientState( GL_TEXTURE_COORD_ARRAY ); |
---|
| 2410 | } |
---|
| 2411 | glClientActiveTextureARB(GL_TEXTURE0); |
---|
| 2412 | glDisableClientState( GL_NORMAL_ARRAY ); |
---|
| 2413 | glDisableClientState( GL_COLOR_ARRAY ); |
---|
| 2414 | if (GLEW_EXT_secondary_color) |
---|
| 2415 | { |
---|
| 2416 | glDisableClientState( GL_SECONDARY_COLOR_ARRAY ); |
---|
| 2417 | } |
---|
| 2418 | if (mCurrentVertexProgram) |
---|
| 2419 | { |
---|
| 2420 | // unbind any custom attributes |
---|
| 2421 | if (mCurrentVertexProgram->isAttributeValid(VES_BLEND_INDICES)) |
---|
| 2422 | { |
---|
| 2423 | glDisableVertexAttribArrayARB( |
---|
| 2424 | mCurrentVertexProgram->getAttributeIndex( |
---|
| 2425 | VES_BLEND_INDICES)); |
---|
| 2426 | } |
---|
| 2427 | if (mCurrentVertexProgram->isAttributeValid(VES_BLEND_WEIGHTS)) |
---|
| 2428 | { |
---|
| 2429 | glDisableVertexAttribArrayARB( |
---|
| 2430 | mCurrentVertexProgram->getAttributeIndex( |
---|
| 2431 | VES_BLEND_WEIGHTS)); |
---|
| 2432 | } |
---|
| 2433 | if (mCurrentVertexProgram->isAttributeValid(VES_TANGENT)) |
---|
| 2434 | { |
---|
| 2435 | glDisableVertexAttribArrayARB( |
---|
| 2436 | mCurrentVertexProgram->getAttributeIndex( |
---|
| 2437 | VES_TANGENT)); |
---|
| 2438 | } |
---|
| 2439 | if (mCurrentVertexProgram->isAttributeValid(VES_BINORMAL)) |
---|
| 2440 | { |
---|
| 2441 | glDisableVertexAttribArrayARB( |
---|
| 2442 | mCurrentVertexProgram->getAttributeIndex( |
---|
| 2443 | VES_BINORMAL)); |
---|
| 2444 | } |
---|
| 2445 | } |
---|
| 2446 | glColor4f(1,1,1,1); |
---|
| 2447 | if (GLEW_EXT_secondary_color) |
---|
| 2448 | { |
---|
| 2449 | glSecondaryColor3fEXT(0.0f, 0.0f, 0.0f); |
---|
| 2450 | } |
---|
| 2451 | |
---|
| 2452 | } |
---|
| 2453 | //--------------------------------------------------------------------- |
---|
| 2454 | void GLRenderSystem::setNormaliseNormals(bool normalise) |
---|
| 2455 | { |
---|
| 2456 | if (normalise) |
---|
| 2457 | glEnable(GL_NORMALIZE); |
---|
| 2458 | else |
---|
| 2459 | glDisable(GL_NORMALIZE); |
---|
| 2460 | |
---|
| 2461 | } |
---|
| 2462 | //--------------------------------------------------------------------- |
---|
| 2463 | void GLRenderSystem::bindGpuProgram(GpuProgram* prg) |
---|
| 2464 | { |
---|
| 2465 | GLGpuProgram* glprg = static_cast<GLGpuProgram*>(prg); |
---|
| 2466 | |
---|
| 2467 | // Unbind previous gpu program first. |
---|
| 2468 | // |
---|
| 2469 | // Note: |
---|
| 2470 | // 1. Even if both previous and current are the same object, we can't |
---|
| 2471 | // bypass re-bind completely since the object itself maybe modified. |
---|
| 2472 | // But we can bypass unbind based on the assumption that object |
---|
| 2473 | // internally GL program type shouldn't be changed after it has |
---|
| 2474 | // been created. The behavior of bind to a GL program type twice |
---|
| 2475 | // should be same as unbind and rebind that GL program type, even |
---|
| 2476 | // for difference objects. |
---|
| 2477 | // 2. We also assumed that the program's type (vertex or fragment) should |
---|
| 2478 | // not be changed during it's in using. If not, the following switch |
---|
| 2479 | // statement will confuse GL state completely, and we can't fix it |
---|
| 2480 | // here. To fix this case, we must coding the program implementation |
---|
| 2481 | // itself, if type is changing (during load/unload, etc), and it's inuse, |
---|
| 2482 | // unbind and notify render system to correct for its state. |
---|
| 2483 | // |
---|
| 2484 | switch (glprg->getType()) |
---|
| 2485 | { |
---|
| 2486 | case GPT_VERTEX_PROGRAM: |
---|
| 2487 | if (mCurrentVertexProgram != glprg) |
---|
| 2488 | { |
---|
| 2489 | if (mCurrentVertexProgram) |
---|
| 2490 | mCurrentVertexProgram->unbindProgram(); |
---|
| 2491 | mCurrentVertexProgram = glprg; |
---|
| 2492 | } |
---|
| 2493 | break; |
---|
| 2494 | |
---|
| 2495 | case GPT_FRAGMENT_PROGRAM: |
---|
| 2496 | if (mCurrentFragmentProgram != glprg) |
---|
| 2497 | { |
---|
| 2498 | if (mCurrentFragmentProgram) |
---|
| 2499 | mCurrentFragmentProgram->unbindProgram(); |
---|
| 2500 | mCurrentFragmentProgram = glprg; |
---|
| 2501 | } |
---|
| 2502 | break; |
---|
| 2503 | } |
---|
| 2504 | |
---|
| 2505 | // Bind the program |
---|
| 2506 | glprg->bindProgram(); |
---|
| 2507 | |
---|
| 2508 | RenderSystem::bindGpuProgram(prg); |
---|
| 2509 | } |
---|
| 2510 | //--------------------------------------------------------------------- |
---|
| 2511 | void GLRenderSystem::unbindGpuProgram(GpuProgramType gptype) |
---|
| 2512 | { |
---|
| 2513 | |
---|
| 2514 | if (gptype == GPT_VERTEX_PROGRAM && mCurrentVertexProgram) |
---|
| 2515 | { |
---|
| 2516 | mActiveVertexGpuProgramParameters.setNull(); |
---|
| 2517 | mCurrentVertexProgram->unbindProgram(); |
---|
| 2518 | mCurrentVertexProgram = 0; |
---|
| 2519 | } |
---|
| 2520 | else if (gptype == GPT_FRAGMENT_PROGRAM && mCurrentFragmentProgram) |
---|
| 2521 | { |
---|
| 2522 | mActiveFragmentGpuProgramParameters.setNull(); |
---|
| 2523 | mCurrentFragmentProgram->unbindProgram(); |
---|
| 2524 | mCurrentFragmentProgram = 0; |
---|
| 2525 | } |
---|
| 2526 | RenderSystem::unbindGpuProgram(gptype); |
---|
| 2527 | |
---|
| 2528 | } |
---|
| 2529 | //--------------------------------------------------------------------- |
---|
| 2530 | void GLRenderSystem::bindGpuProgramParameters(GpuProgramType gptype, GpuProgramParametersSharedPtr params) |
---|
| 2531 | { |
---|
| 2532 | if (gptype == GPT_VERTEX_PROGRAM) |
---|
| 2533 | { |
---|
| 2534 | mActiveVertexGpuProgramParameters = params; |
---|
| 2535 | mCurrentVertexProgram->bindProgramParameters(params); |
---|
| 2536 | } |
---|
| 2537 | else |
---|
| 2538 | { |
---|
| 2539 | mActiveFragmentGpuProgramParameters = params; |
---|
| 2540 | mCurrentFragmentProgram->bindProgramParameters(params); |
---|
| 2541 | } |
---|
| 2542 | } |
---|
| 2543 | //--------------------------------------------------------------------- |
---|
| 2544 | void GLRenderSystem::bindGpuProgramPassIterationParameters(GpuProgramType gptype) |
---|
| 2545 | { |
---|
| 2546 | if (gptype == GPT_VERTEX_PROGRAM) |
---|
| 2547 | { |
---|
| 2548 | mCurrentVertexProgram->bindProgramPassIterationParameters(mActiveVertexGpuProgramParameters); |
---|
| 2549 | } |
---|
| 2550 | else |
---|
| 2551 | { |
---|
| 2552 | mCurrentFragmentProgram->bindProgramPassIterationParameters(mActiveFragmentGpuProgramParameters); |
---|
| 2553 | } |
---|
| 2554 | } |
---|
| 2555 | //--------------------------------------------------------------------- |
---|
| 2556 | void GLRenderSystem::setClipPlanes(const PlaneList& clipPlanes) |
---|
| 2557 | { |
---|
| 2558 | size_t i; |
---|
| 2559 | size_t numClipPlanes; |
---|
| 2560 | GLdouble clipPlane[4]; |
---|
| 2561 | |
---|
| 2562 | numClipPlanes = clipPlanes.size(); |
---|
| 2563 | for (i = 0; i < numClipPlanes; ++i) |
---|
| 2564 | { |
---|
| 2565 | GLenum clipPlaneId = static_cast<GLenum>(GL_CLIP_PLANE0 + i); |
---|
| 2566 | const Plane& plane = clipPlanes[i]; |
---|
| 2567 | |
---|
| 2568 | if (i >= 6/*GL_MAX_CLIP_PLANES*/) |
---|
| 2569 | { |
---|
| 2570 | OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Unable to set clip plane", |
---|
| 2571 | "GLRenderSystem::setClipPlanes"); |
---|
| 2572 | } |
---|
| 2573 | |
---|
| 2574 | clipPlane[0] = plane.normal.x; |
---|
| 2575 | clipPlane[1] = plane.normal.y; |
---|
| 2576 | clipPlane[2] = plane.normal.z; |
---|
| 2577 | clipPlane[3] = plane.d; |
---|
| 2578 | |
---|
| 2579 | glClipPlane(clipPlaneId, clipPlane); |
---|
| 2580 | glEnable(clipPlaneId); |
---|
| 2581 | } |
---|
| 2582 | |
---|
| 2583 | // disable remaining clip planes |
---|
| 2584 | for ( ; i < 6/*GL_MAX_CLIP_PLANES*/; ++i) |
---|
| 2585 | { |
---|
| 2586 | glDisable(static_cast<GLenum>(GL_CLIP_PLANE0 + i)); |
---|
| 2587 | } |
---|
| 2588 | } |
---|
| 2589 | //--------------------------------------------------------------------- |
---|
| 2590 | void GLRenderSystem::setScissorTest(bool enabled, size_t left, |
---|
| 2591 | size_t top, size_t right, size_t bottom) |
---|
| 2592 | { |
---|
| 2593 | // If request texture flipping, use "upper-left", otherwise use "lower-left" |
---|
| 2594 | bool flipping = mActiveRenderTarget->requiresTextureFlipping(); |
---|
| 2595 | // GL measures from the bottom, not the top |
---|
| 2596 | size_t targetHeight = mActiveRenderTarget->getHeight(); |
---|
| 2597 | // Calculate the "lower-left" corner of the viewport |
---|
| 2598 | GLsizei w, h, x, y; |
---|
| 2599 | |
---|
| 2600 | if (enabled) |
---|
| 2601 | { |
---|
| 2602 | glEnable(GL_SCISSOR_TEST); |
---|
| 2603 | // NB GL uses width / height rather than right / bottom |
---|
| 2604 | x = left; |
---|
| 2605 | if (flipping) |
---|
| 2606 | y = top; |
---|
| 2607 | else |
---|
| 2608 | y = targetHeight - bottom; |
---|
| 2609 | w = right - left; |
---|
| 2610 | h = bottom - top; |
---|
| 2611 | glScissor(x, y, w, h); |
---|
| 2612 | } |
---|
| 2613 | else |
---|
| 2614 | { |
---|
| 2615 | glDisable(GL_SCISSOR_TEST); |
---|
| 2616 | // GL requires you to reset the scissor when disabling |
---|
| 2617 | w = mActiveViewport->getActualWidth(); |
---|
| 2618 | h = mActiveViewport->getActualHeight(); |
---|
| 2619 | x = mActiveViewport->getActualLeft(); |
---|
| 2620 | if (flipping) |
---|
| 2621 | y = mActiveViewport->getActualTop(); |
---|
| 2622 | else |
---|
| 2623 | y = targetHeight - mActiveViewport->getActualTop() - h; |
---|
| 2624 | glScissor(x, y, w, h); |
---|
| 2625 | } |
---|
| 2626 | } |
---|
| 2627 | //--------------------------------------------------------------------- |
---|
| 2628 | void GLRenderSystem::clearFrameBuffer(unsigned int buffers, |
---|
| 2629 | const ColourValue& colour, Real depth, unsigned short stencil) |
---|
| 2630 | { |
---|
| 2631 | |
---|
| 2632 | bool colourMask = !mColourWrite[0] || !mColourWrite[1] |
---|
| 2633 | || !mColourWrite[2] || !mColourWrite[3]; |
---|
| 2634 | |
---|
| 2635 | GLbitfield flags = 0; |
---|
| 2636 | if (buffers & FBT_COLOUR) |
---|
| 2637 | { |
---|
| 2638 | flags |= GL_COLOR_BUFFER_BIT; |
---|
| 2639 | // Enable buffer for writing if it isn't |
---|
| 2640 | if (colourMask) |
---|
| 2641 | { |
---|
| 2642 | glColorMask(true, true, true, true); |
---|
| 2643 | } |
---|
| 2644 | glClearColor(colour.r, colour.g, colour.b, colour.a); |
---|
| 2645 | } |
---|
| 2646 | if (buffers & FBT_DEPTH) |
---|
| 2647 | { |
---|
| 2648 | flags |= GL_DEPTH_BUFFER_BIT; |
---|
| 2649 | // Enable buffer for writing if it isn't |
---|
| 2650 | if (!mDepthWrite) |
---|
| 2651 | { |
---|
| 2652 | glDepthMask( GL_TRUE ); |
---|
| 2653 | } |
---|
| 2654 | glClearDepth(depth); |
---|
| 2655 | } |
---|
| 2656 | if (buffers & FBT_STENCIL) |
---|
| 2657 | { |
---|
| 2658 | flags |= GL_STENCIL_BUFFER_BIT; |
---|
| 2659 | // Enable buffer for writing if it isn't |
---|
| 2660 | glStencilMask(0xFFFFFFFF); |
---|
| 2661 | |
---|
| 2662 | glClearStencil(stencil); |
---|
| 2663 | } |
---|
| 2664 | |
---|
| 2665 | // Should be enable scissor test due the clear region is |
---|
| 2666 | // relied on scissor box bounds. |
---|
| 2667 | GLboolean scissorTestEnabled = glIsEnabled(GL_SCISSOR_TEST); |
---|
| 2668 | if (!scissorTestEnabled) |
---|
| 2669 | { |
---|
| 2670 | glEnable(GL_SCISSOR_TEST); |
---|
| 2671 | } |
---|
| 2672 | |
---|
| 2673 | // Sets the scissor box as same as viewport |
---|
| 2674 | GLint viewport[4], scissor[4]; |
---|
| 2675 | glGetIntegerv(GL_VIEWPORT, viewport); |
---|
| 2676 | glGetIntegerv(GL_SCISSOR_BOX, scissor); |
---|
| 2677 | bool scissorBoxDifference = |
---|
| 2678 | viewport[0] != scissor[0] || viewport[1] != scissor[1] || |
---|
| 2679 | viewport[2] != scissor[2] || viewport[3] != scissor[3]; |
---|
| 2680 | if (scissorBoxDifference) |
---|
| 2681 | { |
---|
| 2682 | glScissor(viewport[0], viewport[1], viewport[2], viewport[3]); |
---|
| 2683 | } |
---|
| 2684 | |
---|
| 2685 | // Clear buffers |
---|
| 2686 | glClear(flags); |
---|
| 2687 | |
---|
| 2688 | // Restore scissor box |
---|
| 2689 | if (scissorBoxDifference) |
---|
| 2690 | { |
---|
| 2691 | glScissor(scissor[0], scissor[1], scissor[2], scissor[3]); |
---|
| 2692 | } |
---|
| 2693 | // Restore scissor test |
---|
| 2694 | if (!scissorTestEnabled) |
---|
| 2695 | { |
---|
| 2696 | glDisable(GL_SCISSOR_TEST); |
---|
| 2697 | } |
---|
| 2698 | |
---|
| 2699 | // Reset buffer write state |
---|
| 2700 | if (!mDepthWrite && (buffers & FBT_DEPTH)) |
---|
| 2701 | { |
---|
| 2702 | glDepthMask( GL_FALSE ); |
---|
| 2703 | } |
---|
| 2704 | if (colourMask && (buffers & FBT_COLOUR)) |
---|
| 2705 | { |
---|
| 2706 | glColorMask(mColourWrite[0], mColourWrite[1], mColourWrite[2], mColourWrite[3]); |
---|
| 2707 | } |
---|
| 2708 | if (buffers & FBT_STENCIL) |
---|
| 2709 | { |
---|
| 2710 | glStencilMask(mStencilMask); |
---|
| 2711 | } |
---|
| 2712 | |
---|
| 2713 | } |
---|
| 2714 | // ------------------------------------------------------------------ |
---|
| 2715 | void GLRenderSystem::_makeProjectionMatrix(Real left, Real right, |
---|
| 2716 | Real bottom, Real top, Real nearPlane, Real farPlane, Matrix4& dest, |
---|
| 2717 | bool forGpuProgram) |
---|
| 2718 | { |
---|
| 2719 | Real width = right - left; |
---|
| 2720 | Real height = top - bottom; |
---|
| 2721 | Real q, qn; |
---|
| 2722 | if (farPlane == 0) |
---|
| 2723 | { |
---|
| 2724 | // Infinite far plane |
---|
| 2725 | q = Frustum::INFINITE_FAR_PLANE_ADJUST - 1; |
---|
| 2726 | qn = nearPlane * (Frustum::INFINITE_FAR_PLANE_ADJUST - 2); |
---|
| 2727 | } |
---|
| 2728 | else |
---|
| 2729 | { |
---|
| 2730 | q = -(farPlane + nearPlane) / (farPlane - nearPlane); |
---|
| 2731 | qn = -2 * (farPlane * nearPlane) / (farPlane - nearPlane); |
---|
| 2732 | } |
---|
| 2733 | dest = Matrix4::ZERO; |
---|
| 2734 | dest[0][0] = 2 * nearPlane / width; |
---|
| 2735 | dest[0][2] = (right+left) / width; |
---|
| 2736 | dest[1][1] = 2 * nearPlane / height; |
---|
| 2737 | dest[1][2] = (top+bottom) / height; |
---|
| 2738 | dest[2][2] = q; |
---|
| 2739 | dest[2][3] = qn; |
---|
| 2740 | dest[3][2] = -1; |
---|
| 2741 | } |
---|
| 2742 | |
---|
| 2743 | // ------------------------------------------------------------------ |
---|
| 2744 | void GLRenderSystem::setClipPlane (ushort index, Real A, Real B, Real C, Real D) |
---|
| 2745 | { |
---|
| 2746 | if (ushort(mClipPlanes.size()) < index+1) |
---|
| 2747 | mClipPlanes.resize(index+1); |
---|
| 2748 | mClipPlanes[index] = Vector4 (A, B, C, D); |
---|
| 2749 | GLdouble plane[4] = { A, B, C, D }; |
---|
| 2750 | glClipPlane (GL_CLIP_PLANE0 + index, plane); |
---|
| 2751 | } |
---|
| 2752 | |
---|
| 2753 | // ------------------------------------------------------------------ |
---|
| 2754 | void GLRenderSystem::setGLClipPlanes() const |
---|
| 2755 | { |
---|
| 2756 | size_t size = mClipPlanes.size(); |
---|
| 2757 | for (size_t i=0; i<size; i++) |
---|
| 2758 | { |
---|
| 2759 | const Vector4 &p = mClipPlanes[i]; |
---|
| 2760 | GLdouble plane[4] = { p.x, p.y, p.z, p.w }; |
---|
| 2761 | glClipPlane (GL_CLIP_PLANE0 + i, plane); |
---|
| 2762 | } |
---|
| 2763 | } |
---|
| 2764 | |
---|
| 2765 | // ------------------------------------------------------------------ |
---|
| 2766 | void GLRenderSystem::enableClipPlane (ushort index, bool enable) |
---|
| 2767 | { |
---|
| 2768 | glEnable (GL_CLIP_PLANE0 + index); |
---|
| 2769 | } |
---|
| 2770 | //--------------------------------------------------------------------- |
---|
| 2771 | HardwareOcclusionQuery* GLRenderSystem::createHardwareOcclusionQuery(void) |
---|
| 2772 | { |
---|
| 2773 | GLHardwareOcclusionQuery* ret = new GLHardwareOcclusionQuery(); |
---|
| 2774 | mHwOcclusionQueries.push_back(ret); |
---|
| 2775 | return ret; |
---|
| 2776 | } |
---|
| 2777 | //--------------------------------------------------------------------- |
---|
| 2778 | Real GLRenderSystem::getHorizontalTexelOffset(void) |
---|
| 2779 | { |
---|
| 2780 | // No offset in GL |
---|
| 2781 | return 0.0f; |
---|
| 2782 | } |
---|
| 2783 | //--------------------------------------------------------------------- |
---|
| 2784 | Real GLRenderSystem::getVerticalTexelOffset(void) |
---|
| 2785 | { |
---|
| 2786 | // No offset in GL |
---|
| 2787 | return 0.0f; |
---|
| 2788 | } |
---|
| 2789 | //--------------------------------------------------------------------- |
---|
| 2790 | void GLRenderSystem::_applyObliqueDepthProjection(Matrix4& matrix, const Plane& plane, |
---|
| 2791 | bool forGpuProgram) |
---|
| 2792 | { |
---|
| 2793 | // Thanks to Eric Lenyel for posting this calculation at www.terathon.com |
---|
| 2794 | |
---|
| 2795 | // Calculate the clip-space corner point opposite the clipping plane |
---|
| 2796 | // as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and |
---|
| 2797 | // transform it into camera space by multiplying it |
---|
| 2798 | // by the inverse of the projection matrix |
---|
| 2799 | |
---|
| 2800 | Vector4 q; |
---|
| 2801 | q.x = (Math::Sign(plane.normal.x) + matrix[0][2]) / matrix[0][0]; |
---|
| 2802 | q.y = (Math::Sign(plane.normal.y) + matrix[1][2]) / matrix[1][1]; |
---|
| 2803 | q.z = -1.0F; |
---|
| 2804 | q.w = (1.0F + matrix[2][2]) / matrix[2][3]; |
---|
| 2805 | |
---|
| 2806 | // Calculate the scaled plane vector |
---|
| 2807 | Vector4 clipPlane4d(plane.normal.x, plane.normal.y, plane.normal.z, plane.d); |
---|
| 2808 | Vector4 c = clipPlane4d * (2.0F / (clipPlane4d.dotProduct(q))); |
---|
| 2809 | |
---|
| 2810 | // Replace the third row of the projection matrix |
---|
| 2811 | matrix[2][0] = c.x; |
---|
| 2812 | matrix[2][1] = c.y; |
---|
| 2813 | matrix[2][2] = c.z + 1.0F; |
---|
| 2814 | matrix[2][3] = c.w; |
---|
| 2815 | } |
---|
| 2816 | //--------------------------------------------------------------------- |
---|
| 2817 | void GLRenderSystem::_oneTimeContextInitialization() |
---|
| 2818 | { |
---|
| 2819 | // Set nicer lighting model -- d3d9 has this by default |
---|
| 2820 | glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR); |
---|
| 2821 | glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1); |
---|
| 2822 | glEnable(GL_COLOR_SUM); |
---|
| 2823 | glDisable(GL_DITHER); |
---|
| 2824 | |
---|
| 2825 | // Check for FSAA |
---|
| 2826 | // Enable the extension if it was enabled by the GLSupport |
---|
| 2827 | if (mGLSupport->checkExtension("GL_ARB_multisample")) |
---|
| 2828 | { |
---|
| 2829 | int fsaa_active = false; |
---|
| 2830 | glGetIntegerv(GL_SAMPLE_BUFFERS_ARB,(GLint*)&fsaa_active); |
---|
| 2831 | if(fsaa_active) |
---|
| 2832 | { |
---|
| 2833 | glEnable(GL_MULTISAMPLE_ARB); |
---|
| 2834 | LogManager::getSingleton().logMessage("Using FSAA from GL_ARB_multisample extension."); |
---|
| 2835 | } |
---|
| 2836 | } |
---|
| 2837 | } |
---|
| 2838 | //--------------------------------------------------------------------- |
---|
| 2839 | void GLRenderSystem::_switchContext(GLContext *context) |
---|
| 2840 | { |
---|
| 2841 | // Unbind GPU programs and rebind to new context later, because |
---|
| 2842 | // scene manager treat render system as ONE 'context' ONLY, and it |
---|
| 2843 | // cached the GPU programs using state. |
---|
| 2844 | if (mCurrentVertexProgram) |
---|
| 2845 | mCurrentVertexProgram->unbindProgram(); |
---|
| 2846 | if (mCurrentFragmentProgram) |
---|
| 2847 | mCurrentFragmentProgram->unbindProgram(); |
---|
| 2848 | |
---|
| 2849 | // It's ready to switching |
---|
| 2850 | mCurrentContext->endCurrent(); |
---|
| 2851 | mCurrentContext = context; |
---|
| 2852 | mCurrentContext->setCurrent(); |
---|
| 2853 | |
---|
| 2854 | // Check if the context has already done one-time initialisation |
---|
| 2855 | if(!mCurrentContext->getInitialized()) |
---|
| 2856 | { |
---|
| 2857 | _oneTimeContextInitialization(); |
---|
| 2858 | mCurrentContext->setInitialized(); |
---|
| 2859 | } |
---|
| 2860 | |
---|
| 2861 | // Rebind GPU programs to new context |
---|
| 2862 | if (mCurrentVertexProgram) |
---|
| 2863 | mCurrentVertexProgram->bindProgram(); |
---|
| 2864 | if (mCurrentFragmentProgram) |
---|
| 2865 | mCurrentFragmentProgram->bindProgram(); |
---|
| 2866 | |
---|
| 2867 | // Must reset depth/colour write mask to according with user desired, otherwise, |
---|
| 2868 | // clearFrameBuffer would be wrong because the value we are recorded may be |
---|
| 2869 | // difference with the really state stored in GL context. |
---|
| 2870 | glDepthMask(mDepthWrite); |
---|
| 2871 | glColorMask(mColourWrite[0], mColourWrite[1], mColourWrite[2], mColourWrite[3]); |
---|
| 2872 | glStencilMask(mStencilMask); |
---|
| 2873 | |
---|
| 2874 | } |
---|
| 2875 | //--------------------------------------------------------------------- |
---|
| 2876 | void GLRenderSystem::_setRenderTarget(RenderTarget *target) |
---|
| 2877 | { |
---|
| 2878 | // Unbind frame buffer object |
---|
| 2879 | if(mActiveRenderTarget) |
---|
| 2880 | mRTTManager->unbind(mActiveRenderTarget); |
---|
| 2881 | |
---|
| 2882 | mActiveRenderTarget = target; |
---|
| 2883 | |
---|
| 2884 | // Switch context if different from current one |
---|
| 2885 | GLContext *newContext = 0; |
---|
| 2886 | target->getCustomAttribute("GLCONTEXT", &newContext); |
---|
| 2887 | if(newContext && mCurrentContext != newContext) |
---|
| 2888 | { |
---|
| 2889 | _switchContext(newContext); |
---|
| 2890 | } |
---|
| 2891 | |
---|
| 2892 | // Bind frame buffer object |
---|
| 2893 | mRTTManager->bind(target); |
---|
| 2894 | } |
---|
| 2895 | //--------------------------------------------------------------------- |
---|
| 2896 | void GLRenderSystem::_unregisterContext(GLContext *context) |
---|
| 2897 | { |
---|
| 2898 | if(mCurrentContext == context) { |
---|
| 2899 | // Change the context to something else so that a valid context |
---|
| 2900 | // remains active. When this is the main context being unregistered, |
---|
| 2901 | // we set the main context to 0. |
---|
| 2902 | if(mCurrentContext != mMainContext) { |
---|
| 2903 | _switchContext(mMainContext); |
---|
| 2904 | } else { |
---|
| 2905 | /// No contexts remain |
---|
| 2906 | mCurrentContext->endCurrent(); |
---|
| 2907 | mCurrentContext = 0; |
---|
| 2908 | mMainContext = 0; |
---|
| 2909 | } |
---|
| 2910 | } |
---|
| 2911 | } |
---|
| 2912 | //--------------------------------------------------------------------- |
---|
| 2913 | Real GLRenderSystem::getMinimumDepthInputValue(void) |
---|
| 2914 | { |
---|
| 2915 | // Range [-1.0f, 1.0f] |
---|
| 2916 | return -1.0f; |
---|
| 2917 | } |
---|
| 2918 | //--------------------------------------------------------------------- |
---|
| 2919 | Real GLRenderSystem::getMaximumDepthInputValue(void) |
---|
| 2920 | { |
---|
| 2921 | // Range [-1.0f, 1.0f] |
---|
| 2922 | return 1.0f; |
---|
| 2923 | } |
---|
| 2924 | //--------------------------------------------------------------------- |
---|
| 2925 | void GLRenderSystem::registerThread() |
---|
| 2926 | { |
---|
| 2927 | // This is only valid once we've created the main context |
---|
| 2928 | if (!mMainContext) |
---|
| 2929 | { |
---|
| 2930 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
---|
| 2931 | "Cannot register a background thread before the main context " |
---|
| 2932 | "has been created.", |
---|
| 2933 | "GLRenderSystem::registerThread"); |
---|
| 2934 | } |
---|
| 2935 | |
---|
| 2936 | // Create a new context for this thread. Cloning from the main context |
---|
| 2937 | // will ensure that resources are shared with the main context |
---|
| 2938 | // We want a separate context so that we can safely create GL |
---|
| 2939 | // objects in parallel with the main thread |
---|
| 2940 | GLContext* newContext = mMainContext->clone(); |
---|
| 2941 | mBackgroundContextList.push_back(newContext); |
---|
| 2942 | |
---|
| 2943 | // Bind this new context to this thread. |
---|
| 2944 | newContext->setCurrent(); |
---|
| 2945 | |
---|
| 2946 | _oneTimeContextInitialization(); |
---|
| 2947 | newContext->setInitialized(); |
---|
| 2948 | |
---|
| 2949 | |
---|
| 2950 | } |
---|
| 2951 | //--------------------------------------------------------------------- |
---|
| 2952 | void GLRenderSystem::unregisterThread() |
---|
| 2953 | { |
---|
| 2954 | // nothing to do here? |
---|
| 2955 | // Don't need to worry about active context, just make sure we delete |
---|
| 2956 | // on shutdown. |
---|
| 2957 | |
---|
| 2958 | } |
---|
| 2959 | //--------------------------------------------------------------------- |
---|
| 2960 | void GLRenderSystem::preExtraThreadsStarted() |
---|
| 2961 | { |
---|
| 2962 | // free context, we'll need this to share lists |
---|
| 2963 | mCurrentContext->endCurrent(); |
---|
| 2964 | } |
---|
| 2965 | //--------------------------------------------------------------------- |
---|
| 2966 | void GLRenderSystem::postExtraThreadsStarted() |
---|
| 2967 | { |
---|
| 2968 | // reacquire context |
---|
| 2969 | mCurrentContext->setCurrent(); |
---|
| 2970 | } |
---|
| 2971 | |
---|
| 2972 | |
---|
| 2973 | } |
---|