[1] | 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 | |
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| 30 | #include "OgreGLTextureManager.h" |
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| 31 | #include "OgreRoot.h" |
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| 32 | #include "OgreRenderSystem.h" |
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| 33 | #include "OgreGLRenderTexture.h" |
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| 34 | |
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| 35 | namespace Ogre { |
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| 36 | //----------------------------------------------------------------------------- |
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| 37 | GLTextureManager::GLTextureManager(GLSupport& support) |
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| 38 | : TextureManager(), mGLSupport(support), mWarningTextureID(0) |
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| 39 | { |
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| 40 | // register with group manager |
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| 41 | ResourceGroupManager::getSingleton()._registerResourceManager(mResourceType, this); |
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| 42 | |
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| 43 | createWarningTexture(); |
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| 44 | } |
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| 45 | //----------------------------------------------------------------------------- |
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| 46 | GLTextureManager::~GLTextureManager() |
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| 47 | { |
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| 48 | // unregister with group manager |
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| 49 | ResourceGroupManager::getSingleton()._unregisterResourceManager(mResourceType); |
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| 50 | // Delete warning texture |
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| 51 | glDeleteTextures(1, &mWarningTextureID); |
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| 52 | } |
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| 53 | //----------------------------------------------------------------------------- |
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| 54 | Resource* GLTextureManager::createImpl(const String& name, ResourceHandle handle, |
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| 55 | const String& group, bool isManual, ManualResourceLoader* loader, |
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| 56 | const NameValuePairList* createParams) |
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| 57 | { |
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| 58 | return new GLTexture(this, name, handle, group, isManual, loader, mGLSupport); |
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| 59 | } |
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| 60 | |
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| 61 | //----------------------------------------------------------------------------- |
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| 62 | void GLTextureManager::createWarningTexture() |
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| 63 | { |
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| 64 | // Generate warning texture |
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| 65 | size_t width = 8; |
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| 66 | size_t height = 8; |
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| 67 | uint32 *data = new uint32[width*height]; // 0xXXRRGGBB |
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| 68 | // Yellow/black stripes |
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| 69 | for(size_t y=0; y<height; ++y) |
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| 70 | { |
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| 71 | for(size_t x=0; x<width; ++x) |
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| 72 | { |
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| 73 | data[y*width+x] = (((x+y)%8)<4)?0x000000:0xFFFF00; |
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| 74 | } |
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| 75 | } |
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| 76 | // Create GL resource |
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| 77 | glGenTextures(1, &mWarningTextureID); |
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| 78 | glBindTexture(GL_TEXTURE_2D, mWarningTextureID); |
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| 79 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0); |
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| 80 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, (void*)data); |
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| 81 | // Free memory |
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| 82 | delete [] data; |
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| 83 | } |
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| 84 | //----------------------------------------------------------------------------- |
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| 85 | PixelFormat GLTextureManager::getNativeFormat(TextureType ttype, PixelFormat format, int usage) |
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| 86 | { |
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| 87 | // Adjust requested parameters to capabilities |
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| 88 | const RenderSystemCapabilities *caps = Root::getSingleton().getRenderSystem()->getCapabilities(); |
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| 89 | |
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| 90 | // Check compressed texture support |
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| 91 | // if a compressed format not supported, revert to PF_A8R8G8B8 |
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| 92 | if(PixelUtil::isCompressed(format) && |
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| 93 | !caps->hasCapability( RSC_TEXTURE_COMPRESSION_DXT )) |
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| 94 | { |
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| 95 | return PF_A8R8G8B8; |
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| 96 | } |
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| 97 | // if floating point textures not supported, revert to PF_A8R8G8B8 |
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| 98 | if(PixelUtil::isFloatingPoint(format) && |
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| 99 | !caps->hasCapability( RSC_TEXTURE_FLOAT )) |
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| 100 | { |
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| 101 | return PF_A8R8G8B8; |
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| 102 | } |
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| 103 | |
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| 104 | // Check if this is a valid rendertarget format |
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| 105 | if( usage & TU_RENDERTARGET ) |
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| 106 | { |
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| 107 | /// Get closest supported alternative |
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| 108 | /// If mFormat is supported it's returned |
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| 109 | return GLRTTManager::getSingleton().getSupportedAlternative(format); |
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| 110 | } |
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| 111 | |
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| 112 | // Supported |
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| 113 | return format; |
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| 114 | |
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| 115 | |
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| 116 | } |
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| 117 | //----------------------------------------------------------------------------- |
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| 118 | bool GLTextureManager::isHardwareFilteringSupported(TextureType ttype, PixelFormat format, int usage, |
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| 119 | bool preciseFormatOnly) |
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| 120 | { |
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| 121 | if (format == PF_UNKNOWN) |
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| 122 | return false; |
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| 123 | |
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| 124 | // Check natively format |
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| 125 | PixelFormat nativeFormat = getNativeFormat(ttype, format, usage); |
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| 126 | if (preciseFormatOnly && format != nativeFormat) |
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| 127 | return false; |
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| 128 | |
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| 129 | // Assume non-floating point is supported always |
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| 130 | if (!PixelUtil::isFloatingPoint(nativeFormat)) |
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| 131 | return true; |
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| 132 | |
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| 133 | // Hack: there are no elegant GL API to detects texture filtering supported, |
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| 134 | // just hard code for cards based on vendor specifications. |
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| 135 | |
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| 136 | // TODO: Add cards that 16 bits floating point flitering supported by |
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| 137 | // hardware below |
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| 138 | static const String sFloat16SupportedCards[] = |
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| 139 | { |
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| 140 | // GeForce 8 Series |
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| 141 | "*GeForce*8800*", |
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| 142 | |
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| 143 | // GeForce 7 Series |
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| 144 | "*GeForce*7950*", |
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| 145 | "*GeForce*7900*", |
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| 146 | "*GeForce*7800*", |
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| 147 | "*GeForce*7600*", |
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| 148 | "*GeForce*7500*", |
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| 149 | "*GeForce*7300*", |
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| 150 | |
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| 151 | // GeForce 6 Series |
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| 152 | "*GeForce*6800*", |
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| 153 | "*GeForce*6700*", |
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| 154 | "*GeForce*6600*", |
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| 155 | "*GeForce*6500*", |
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| 156 | |
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| 157 | "" // Empty string means end of list |
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| 158 | }; |
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| 159 | |
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| 160 | // TODO: Add cards that 32 bits floating point flitering supported by |
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| 161 | // hardware below |
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| 162 | static const String sFloat32SupportedCards[] = |
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| 163 | { |
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| 164 | // GeForce 8 Series |
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| 165 | "*GeForce*8800*", |
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| 166 | |
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| 167 | "" // Empty string means end of list |
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| 168 | }; |
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| 169 | |
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| 170 | PixelComponentType pct = PixelUtil::getComponentType(nativeFormat); |
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| 171 | const String* supportedCards; |
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| 172 | switch (pct) |
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| 173 | { |
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| 174 | case PCT_FLOAT16: |
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| 175 | supportedCards = sFloat16SupportedCards; |
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| 176 | break; |
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| 177 | case PCT_FLOAT32: |
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| 178 | supportedCards = sFloat32SupportedCards; |
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| 179 | break; |
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| 180 | default: |
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| 181 | return false; |
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| 182 | } |
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| 183 | |
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| 184 | const GLubyte* pcRenderer = glGetString(GL_RENDERER); |
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| 185 | String str = (const char*)pcRenderer; |
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| 186 | |
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| 187 | for (; !supportedCards->empty(); ++supportedCards) |
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| 188 | { |
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| 189 | if (StringUtil::match(str, *supportedCards)) |
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| 190 | { |
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| 191 | return true; |
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| 192 | } |
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| 193 | } |
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| 194 | |
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| 195 | return false; |
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| 196 | } |
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| 197 | |
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| 198 | } |
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