| 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. |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | #ifndef __GLRenderSystem_H__ |
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| 30 | #define __GLRenderSystem_H__ |
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| 31 | |
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| 32 | #include "OgreGLPrerequisites.h" |
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| 33 | #include "OgrePlatform.h" |
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| 34 | #include "OgreRenderSystem.h" |
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| 35 | #include "OgreGLHardwareBufferManager.h" |
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| 36 | #include "OgreGLGpuProgramManager.h" |
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| 37 | #include "OgreGLSLProgramFactory.h" |
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| 38 | #include "OgreVector4.h" |
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| 39 | |
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| 40 | |
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| 41 | namespace Ogre { |
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| 42 | /** |
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| 43 | Implementation of GL as a rendering system. |
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| 44 | */ |
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| 45 | class _OgrePrivate GLRenderSystem : public RenderSystem |
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| 46 | { |
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| 47 | private: |
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| 48 | // Rendering loop control |
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| 49 | bool mStopRendering; |
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| 50 | |
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| 51 | // Array of up to 8 lights, indexed as per API |
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| 52 | // Note that a null value indicates a free slot |
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| 53 | #define MAX_LIGHTS 8 |
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| 54 | Light* mLights[MAX_LIGHTS]; |
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| 55 | |
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| 56 | // clip planes |
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| 57 | typedef std::vector<Vector4> PlaneList2; |
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| 58 | PlaneList2 mClipPlanes; |
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| 59 | void setGLClipPlanes() const; |
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| 60 | |
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| 61 | |
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| 62 | // view matrix to set world against |
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| 63 | Matrix4 mViewMatrix; |
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| 64 | Matrix4 mWorldMatrix; |
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| 65 | Matrix4 mTextureMatrix; |
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| 66 | |
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| 67 | // Last min & mip filtering options, so we can combine them |
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| 68 | FilterOptions mMinFilter; |
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| 69 | FilterOptions mMipFilter; |
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| 70 | |
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| 71 | // What texture coord set each texture unit is using |
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| 72 | size_t mTextureCoordIndex[OGRE_MAX_TEXTURE_LAYERS]; |
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| 73 | |
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| 74 | /// holds texture type settings for every stage |
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| 75 | GLenum mTextureTypes[OGRE_MAX_TEXTURE_LAYERS]; |
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| 76 | |
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| 77 | /// Number of fixed-function texture units |
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| 78 | unsigned short mFixedFunctionTextureUnits; |
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| 79 | |
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| 80 | void initConfigOptions(void); |
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| 81 | void initInputDevices(void); |
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| 82 | void processInputDevices(void); |
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| 83 | |
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| 84 | void setGLLight(size_t index, Light* lt); |
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| 85 | void makeGLMatrix(GLfloat gl_matrix[16], const Matrix4& m); |
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| 86 | |
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| 87 | GLint getBlendMode(SceneBlendFactor ogreBlend) const; |
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| 88 | GLint getTextureAddressingMode(TextureUnitState::TextureAddressingMode tam) const; |
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| 89 | |
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| 90 | void setLights(); |
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| 91 | |
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| 92 | // Store last depth write state |
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| 93 | bool mDepthWrite; |
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| 94 | // Store last stencil mask state |
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| 95 | uint32 mStencilMask; |
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| 96 | // Store last colour write state |
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| 97 | bool mColourWrite[4]; |
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| 98 | |
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| 99 | GLint convertCompareFunction(CompareFunction func) const; |
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| 100 | GLint convertStencilOp(StencilOperation op, bool invert = false) const; |
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| 101 | |
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| 102 | // internal method for anisotrophy validation |
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| 103 | GLfloat _getCurrentAnisotropy(size_t unit); |
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| 104 | |
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| 105 | /// GL support class, used for creating windows etc |
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| 106 | GLSupport* mGLSupport; |
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| 107 | |
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| 108 | /// Internal method to set pos / direction of a light |
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| 109 | void setGLLightPositionDirection(Light* lt, GLenum lightindex); |
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| 110 | |
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| 111 | bool mUseAutoTextureMatrix; |
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| 112 | GLfloat mAutoTextureMatrix[16]; |
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| 113 | |
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| 114 | // check if the GL system has already been initialized |
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| 115 | bool mGLInitialized; |
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| 116 | // Initialise GL system and capabilities |
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| 117 | void initGL(RenderTarget *primary); |
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| 118 | |
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| 119 | HardwareBufferManager* mHardwareBufferManager; |
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| 120 | GLGpuProgramManager* mGpuProgramManager; |
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| 121 | GLSLProgramFactory* mGLSLProgramFactory; |
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| 122 | |
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| 123 | unsigned short mCurrentLights; |
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| 124 | |
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| 125 | GLuint getCombinedMinMipFilter(void) const; |
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| 126 | |
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| 127 | GLGpuProgram* mCurrentVertexProgram; |
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| 128 | GLGpuProgram* mCurrentFragmentProgram; |
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| 129 | |
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| 130 | /* The main GL context - main thread only */ |
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| 131 | GLContext *mMainContext; |
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| 132 | /* The current GL context - main thread only*/ |
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| 133 | GLContext *mCurrentContext; |
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| 134 | typedef std::list<GLContext*> GLContextList; |
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| 135 | /// List of background thread contexts |
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| 136 | GLContextList mBackgroundContextList; |
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| 137 | |
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| 138 | /** Manager object for creating render textures. |
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| 139 | Direct render to texture via GL_EXT_framebuffer_object is preferable |
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| 140 | to pbuffers, which depend on the GL support used and are generally |
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| 141 | unwieldy and slow. However, FBO support for stencil buffers is poor. |
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| 142 | */ |
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| 143 | GLRTTManager *mRTTManager; |
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| 144 | public: |
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| 145 | // Default constructor / destructor |
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| 146 | GLRenderSystem(); |
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| 147 | ~GLRenderSystem(); |
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| 148 | |
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| 149 | // ---------------------------------- |
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| 150 | // Overridden RenderSystem functions |
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| 151 | // ---------------------------------- |
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| 152 | /** See |
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| 153 | RenderSystem |
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| 154 | */ |
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| 155 | const String& getName(void) const; |
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| 156 | /** See |
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| 157 | RenderSystem |
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| 158 | */ |
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| 159 | ConfigOptionMap& getConfigOptions(void); |
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| 160 | /** See |
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| 161 | RenderSystem |
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| 162 | */ |
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| 163 | void setConfigOption(const String &name, const String &value); |
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| 164 | /** See |
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| 165 | RenderSystem |
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| 166 | */ |
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| 167 | String validateConfigOptions(void); |
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| 168 | /** See |
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| 169 | RenderSystem |
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| 170 | */ |
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| 171 | RenderWindow* initialise(bool autoCreateWindow, const String& windowTitle = "OGRE Render Window"); |
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| 172 | /** See |
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| 173 | RenderSystem |
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| 174 | */ |
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| 175 | void reinitialise(void); // Used if settings changed mid-rendering |
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| 176 | /** See |
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| 177 | RenderSystem |
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| 178 | */ |
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| 179 | void shutdown(void); |
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| 180 | |
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| 181 | /** See |
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| 182 | RenderSystem |
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| 183 | */ |
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| 184 | void setAmbientLight(float r, float g, float b); |
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| 185 | /** See |
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| 186 | RenderSystem |
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| 187 | */ |
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| 188 | void setShadingType(ShadeOptions so); |
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| 189 | /** See |
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| 190 | RenderSystem |
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| 191 | */ |
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| 192 | void setLightingEnabled(bool enabled); |
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| 193 | |
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| 194 | /// @copydoc RenderSystem::createRenderWindow |
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| 195 | RenderWindow* createRenderWindow(const String &name, unsigned int width, unsigned int height, |
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| 196 | bool fullScreen, const NameValuePairList *miscParams = 0); |
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| 197 | |
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| 198 | /// @copydoc RenderSystem::createMultiRenderTarget |
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| 199 | virtual MultiRenderTarget * createMultiRenderTarget(const String & name); |
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| 200 | |
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| 201 | /** See |
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| 202 | RenderSystem |
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| 203 | */ |
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| 204 | void destroyRenderWindow(RenderWindow* pWin); |
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| 205 | /** See |
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| 206 | RenderSystem |
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| 207 | */ |
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| 208 | String getErrorDescription(long errorNumber) const; |
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| 209 | |
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| 210 | /** See |
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| 211 | RenderSystem |
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| 212 | */ |
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| 213 | VertexElementType getColourVertexElementType(void) const; |
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| 214 | /** See |
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| 215 | RenderSystem |
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| 216 | */ |
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| 217 | void setNormaliseNormals(bool normalise); |
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| 218 | |
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| 219 | // ----------------------------- |
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| 220 | // Low-level overridden members |
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| 221 | // ----------------------------- |
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| 222 | /** See |
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| 223 | RenderSystem |
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| 224 | */ |
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| 225 | void _useLights(const LightList& lights, unsigned short limit); |
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| 226 | /** See |
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| 227 | RenderSystem |
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| 228 | */ |
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| 229 | void _setWorldMatrix(const Matrix4 &m); |
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| 230 | /** See |
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| 231 | RenderSystem |
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| 232 | */ |
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| 233 | void _setViewMatrix(const Matrix4 &m); |
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| 234 | /** See |
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| 235 | RenderSystem |
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| 236 | */ |
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| 237 | void _setProjectionMatrix(const Matrix4 &m); |
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| 238 | /** See |
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| 239 | RenderSystem |
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| 240 | */ |
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| 241 | void _setSurfaceParams(const ColourValue &ambient, |
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| 242 | const ColourValue &diffuse, const ColourValue &specular, |
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| 243 | const ColourValue &emissive, Real shininess, |
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| 244 | TrackVertexColourType tracking); |
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| 245 | /** See |
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| 246 | RenderSystem |
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| 247 | */ |
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| 248 | void _setPointParameters(Real size, bool attenuationEnabled, |
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| 249 | Real constant, Real linear, Real quadratic, Real minSize, Real maxSize); |
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| 250 | /** See |
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| 251 | RenderSystem |
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| 252 | */ |
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| 253 | void _setPointSpritesEnabled(bool enabled); |
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| 254 | /** See |
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| 255 | RenderSystem |
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| 256 | */ |
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| 257 | void _setTexture(size_t unit, bool enabled, const TexturePtr &tex); |
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| 258 | /** See |
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| 259 | RenderSystem |
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| 260 | */ |
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| 261 | void _setTextureCoordSet(size_t stage, size_t index); |
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| 262 | /** See |
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| 263 | RenderSystem |
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| 264 | */ |
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| 265 | void _setTextureCoordCalculation(size_t stage, TexCoordCalcMethod m, |
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| 266 | const Frustum* frustum = 0); |
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| 267 | /** See |
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| 268 | RenderSystem |
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| 269 | */ |
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| 270 | void _setTextureBlendMode(size_t stage, const LayerBlendModeEx& bm); |
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| 271 | /** See |
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| 272 | RenderSystem |
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| 273 | */ |
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| 274 | void _setTextureAddressingMode(size_t stage, const TextureUnitState::UVWAddressingMode& uvw); |
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| 275 | /** See |
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| 276 | RenderSystem |
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| 277 | */ |
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| 278 | void _setTextureBorderColour(size_t stage, const ColourValue& colour); |
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| 279 | /** See |
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| 280 | RenderSystem |
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| 281 | */ |
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| 282 | void _setTextureMipmapBias(size_t unit, float bias); |
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| 283 | /** See |
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| 284 | RenderSystem |
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| 285 | */ |
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| 286 | void _setTextureMatrix(size_t stage, const Matrix4& xform); |
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| 287 | /** See |
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| 288 | RenderSystem |
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| 289 | */ |
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| 290 | void _setSceneBlending(SceneBlendFactor sourceFactor, SceneBlendFactor destFactor); |
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| 291 | /** See |
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| 292 | RenderSystem |
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| 293 | */ |
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| 294 | void _setAlphaRejectSettings(CompareFunction func, unsigned char value); |
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| 295 | /** See |
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| 296 | RenderSystem |
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| 297 | */ |
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| 298 | void _setViewport(Viewport *vp); |
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| 299 | /** See |
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| 300 | RenderSystem |
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| 301 | */ |
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| 302 | void _beginFrame(void); |
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| 303 | /** See |
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| 304 | RenderSystem |
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| 305 | */ |
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| 306 | void _endFrame(void); |
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| 307 | /** See |
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| 308 | RenderSystem |
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| 309 | */ |
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| 310 | void _setCullingMode(CullingMode mode); |
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| 311 | /** See |
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| 312 | RenderSystem |
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| 313 | */ |
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| 314 | void _setDepthBufferParams(bool depthTest = true, bool depthWrite = true, CompareFunction depthFunction = CMPF_LESS_EQUAL); |
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| 315 | /** See |
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| 316 | RenderSystem |
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| 317 | */ |
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| 318 | void _setDepthBufferCheckEnabled(bool enabled = true); |
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| 319 | /** See |
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| 320 | RenderSystem |
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| 321 | */ |
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| 322 | void _setDepthBufferWriteEnabled(bool enabled = true); |
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| 323 | /** See |
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| 324 | RenderSystem |
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| 325 | */ |
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| 326 | void _setDepthBufferFunction(CompareFunction func = CMPF_LESS_EQUAL); |
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| 327 | /** See |
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| 328 | RenderSystem |
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| 329 | */ |
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| 330 | void _setDepthBias(float constantBias, float slopeScaleBias); |
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| 331 | /** See |
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| 332 | RenderSystem |
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| 333 | */ |
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| 334 | void _setColourBufferWriteEnabled(bool red, bool green, bool blue, bool alpha); |
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| 335 | /** See |
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| 336 | RenderSystem |
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| 337 | */ |
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| 338 | void _setFog(FogMode mode, const ColourValue& colour, Real density, Real start, Real end); |
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| 339 | /** See |
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| 340 | RenderSystem |
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| 341 | */ |
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| 342 | void _convertProjectionMatrix(const Matrix4& matrix, |
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| 343 | Matrix4& dest, bool forGpuProgram = false); |
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| 344 | /** See |
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| 345 | RenderSystem |
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| 346 | */ |
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| 347 | void _makeProjectionMatrix(const Radian& fovy, Real aspect, Real nearPlane, Real farPlane, |
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| 348 | Matrix4& dest, bool forGpuProgram = false); |
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| 349 | /** See |
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| 350 | RenderSystem |
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| 351 | */ |
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| 352 | void _makeProjectionMatrix(Real left, Real right, Real bottom, Real top, |
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| 353 | Real nearPlane, Real farPlane, Matrix4& dest, bool forGpuProgram = false); |
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| 354 | /** See |
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| 355 | RenderSystem |
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| 356 | */ |
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| 357 | void _makeOrthoMatrix(const Radian& fovy, Real aspect, Real nearPlane, Real farPlane, |
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| 358 | Matrix4& dest, bool forGpuProgram = false); |
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| 359 | /** See |
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| 360 | RenderSystem |
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| 361 | */ |
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| 362 | void _applyObliqueDepthProjection(Matrix4& matrix, const Plane& plane, |
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| 363 | bool forGpuProgram); |
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| 364 | /** See |
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| 365 | RenderSystem |
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| 366 | */ |
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| 367 | void setClipPlane (ushort index, Real A, Real B, Real C, Real D); |
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| 368 | /** See |
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| 369 | RenderSystem |
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| 370 | */ |
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| 371 | void enableClipPlane (ushort index, bool enable); |
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| 372 | /** See |
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| 373 | RenderSystem |
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| 374 | */ |
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| 375 | void _setPolygonMode(PolygonMode level); |
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| 376 | /** See |
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| 377 | RenderSystem |
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| 378 | */ |
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| 379 | void setStencilCheckEnabled(bool enabled); |
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| 380 | /** See RenderSystem. |
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| 381 | */ |
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| 382 | void setStencilBufferParams(CompareFunction func = CMPF_ALWAYS_PASS, |
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| 383 | uint32 refValue = 0, uint32 mask = 0xFFFFFFFF, |
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| 384 | StencilOperation stencilFailOp = SOP_KEEP, |
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| 385 | StencilOperation depthFailOp = SOP_KEEP, |
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| 386 | StencilOperation passOp = SOP_KEEP, |
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| 387 | bool twoSidedOperation = false); |
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| 388 | /** See |
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| 389 | RenderSystem |
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| 390 | */ |
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| 391 | void _setTextureUnitFiltering(size_t unit, FilterType ftype, FilterOptions filter); |
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| 392 | /** See |
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| 393 | RenderSystem |
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| 394 | */ |
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| 395 | void _setTextureLayerAnisotropy(size_t unit, unsigned int maxAnisotropy); |
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| 396 | /** See |
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| 397 | RenderSystem |
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| 398 | */ |
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| 399 | void setVertexDeclaration(VertexDeclaration* decl); |
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| 400 | /** See |
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| 401 | RenderSystem |
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| 402 | */ |
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| 403 | void setVertexBufferBinding(VertexBufferBinding* binding); |
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| 404 | /** See |
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| 405 | RenderSystem |
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| 406 | */ |
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| 407 | void _render(const RenderOperation& op); |
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| 408 | /** See |
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| 409 | RenderSystem |
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| 410 | */ |
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| 411 | void bindGpuProgram(GpuProgram* prg); |
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| 412 | /** See |
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| 413 | RenderSystem |
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| 414 | */ |
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| 415 | void unbindGpuProgram(GpuProgramType gptype); |
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| 416 | /** See |
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| 417 | RenderSystem |
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| 418 | */ |
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| 419 | void bindGpuProgramParameters(GpuProgramType gptype, GpuProgramParametersSharedPtr params); |
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| 420 | /** See |
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| 421 | RenderSystem |
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| 422 | */ |
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| 423 | void bindGpuProgramPassIterationParameters(GpuProgramType gptype); |
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| 424 | /** See |
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| 425 | RenderSystem |
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| 426 | */ |
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| 427 | void setClipPlanes(const PlaneList& clipPlanes); |
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| 428 | /** See |
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| 429 | RenderSystem |
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| 430 | */ |
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| 431 | void setScissorTest(bool enabled, size_t left = 0, size_t top = 0, size_t right = 800, size_t bottom = 600) ; |
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| 432 | void clearFrameBuffer(unsigned int buffers, |
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| 433 | const ColourValue& colour = ColourValue::Black, |
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| 434 | Real depth = 1.0f, unsigned short stencil = 0); |
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| 435 | HardwareOcclusionQuery* createHardwareOcclusionQuery(void); |
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| 436 | Real getHorizontalTexelOffset(void); |
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| 437 | Real getVerticalTexelOffset(void); |
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| 438 | Real getMinimumDepthInputValue(void); |
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| 439 | Real getMaximumDepthInputValue(void); |
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| 440 | void registerThread(); |
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| 441 | void unregisterThread(); |
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| 442 | void preExtraThreadsStarted(); |
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| 443 | void postExtraThreadsStarted(); |
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| 444 | |
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| 445 | // ---------------------------------- |
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| 446 | // GLRenderSystem specific members |
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| 447 | // ---------------------------------- |
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| 448 | /** One time initialization for the RenderState of a context. Things that |
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| 449 | only need to be set once, like the LightingModel can be defined here. |
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| 450 | */ |
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| 451 | void _oneTimeContextInitialization(); |
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| 452 | /** Switch GL context, dealing with involved internal cached states too |
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| 453 | */ |
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| 454 | void _switchContext(GLContext *context); |
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| 455 | /** |
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| 456 | * Set current render target to target, enabling its GL context if needed |
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| 457 | */ |
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| 458 | void _setRenderTarget(RenderTarget *target); |
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| 459 | /** Unregister a render target->context mapping. If the context of target |
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| 460 | is the current context, change the context to the main context so it |
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| 461 | can be destroyed safely. |
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| 462 | |
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| 463 | @note This is automatically called by the destructor of |
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| 464 | GLContext. |
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| 465 | */ |
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| 466 | void _unregisterContext(GLContext *context); |
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| 467 | /** Returns the main context */ |
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| 468 | GLContext* _getMainContext() {return mMainContext;} |
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| 469 | }; |
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| 470 | } |
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| 471 | #endif |
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| 472 | |
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