1 /* 2 ----------------------------------------------------------------------------- 3 This source file is part of OGRE 4 (Object-oriented Graphics Rendering Engine) 5 For the latest info, see http://www.ogre3d.org/ 6 7 Copyright (c) 2000-2013 Torus Knot Software Ltd 8 9 Permission is hereby granted, free of charge, to any person obtaining a copy 10 of this software and associated documentation files (the "Software"), to deal 11 in the Software without restriction, including without limitation the rights 12 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 13 copies of the Software, and to permit persons to whom the Software is 14 furnished to do so, subject to the following conditions: 15 16 The above copyright notice and this permission notice shall be included in 17 all copies or substantial portions of the Software. 18 19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 22 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 24 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 25 THE SOFTWARE. 26 ----------------------------------------------------------------------------- 27 */ 28 29 #include "OgreGLES2TextureManager.h" 30 #include "OgreGLES2RenderTexture.h" 31 #include "OgreRoot.h" 32 #include "OgreRenderSystem.h" 33 #include "OgreGLES2StateCacheManager.h" 34 35 namespace Ogre { GLES2TextureManager(GLES2Support & support)36 GLES2TextureManager::GLES2TextureManager(GLES2Support& support) 37 : TextureManager(), mGLSupport(support), mWarningTextureID(0) 38 { 39 // Register with group manager 40 ResourceGroupManager::getSingleton()._registerResourceManager(mResourceType, this); 41 } 42 ~GLES2TextureManager()43 GLES2TextureManager::~GLES2TextureManager() 44 { 45 // Unregister with group manager 46 ResourceGroupManager::getSingleton()._unregisterResourceManager(mResourceType); 47 48 // Delete warning texture 49 OGRE_CHECK_GL_ERROR(glDeleteTextures(1, &mWarningTextureID)); 50 } 51 createImpl(const String & name,ResourceHandle handle,const String & group,bool isManual,ManualResourceLoader * loader,const NameValuePairList * createParams)52 Resource* GLES2TextureManager::createImpl(const String& name, ResourceHandle handle, 53 const String& group, bool isManual, 54 ManualResourceLoader* loader, 55 const NameValuePairList* createParams) 56 { 57 return OGRE_NEW GLES2Texture(this, name, handle, group, isManual, loader, mGLSupport); 58 } 59 60 //----------------------------------------------------------------------------- createWarningTexture()61 void GLES2TextureManager::createWarningTexture() 62 { 63 // Generate warning texture 64 uint32 width = 8; 65 uint32 height = 8; 66 67 uint16* data = new uint16[width * height]; 68 69 // Yellow/black stripes 70 for(size_t y = 0; y < height; ++y) 71 { 72 for(size_t x = 0; x < width; ++x) 73 { 74 data[y * width + x] = (((x + y) % 8) < 4) ? 0x0000 : 0xFFF0; 75 } 76 } 77 78 // Create GL resource 79 OGRE_CHECK_GL_ERROR(glGenTextures(1, &mWarningTextureID)); 80 OGRE_CHECK_GL_ERROR(glBindTexture(GL_TEXTURE_2D, mWarningTextureID)); 81 if(mGLSupport.checkExtension("GL_APPLE_texture_max_level") || gleswIsSupported(3, 0)) 82 mGLSupport.getStateCacheManager()->setTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL_APPLE, 0); 83 84 OGRE_CHECK_GL_ERROR(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, 85 GL_UNSIGNED_SHORT_5_6_5, (void*)data)); 86 // Free memory 87 delete [] data; 88 } 89 getNativeFormat(TextureType ttype,PixelFormat format,int usage)90 PixelFormat GLES2TextureManager::getNativeFormat(TextureType ttype, PixelFormat format, int usage) 91 { 92 // Adjust requested parameters to capabilities 93 const RenderSystemCapabilities *caps = Root::getSingleton().getRenderSystem()->getCapabilities(); 94 95 // Check compressed texture support 96 // if a compressed format not supported, revert to PF_A8R8G8B8 97 if (PixelUtil::isCompressed(format) && 98 !caps->hasCapability(RSC_TEXTURE_COMPRESSION_DXT) && 99 !caps->hasCapability(RSC_TEXTURE_COMPRESSION_PVRTC) && 100 !caps->hasCapability(RSC_TEXTURE_COMPRESSION_ATC) && 101 !caps->hasCapability(RSC_TEXTURE_COMPRESSION_ETC1)) 102 { 103 return PF_A8R8G8B8; 104 } 105 // if floating point textures not supported, revert to PF_A8R8G8B8 106 if (PixelUtil::isFloatingPoint(format) && 107 !caps->hasCapability(RSC_TEXTURE_FLOAT)) 108 { 109 return PF_A8R8G8B8; 110 } 111 112 // Check if this is a valid rendertarget format 113 if (usage & TU_RENDERTARGET) 114 { 115 /// Get closest supported alternative 116 /// If mFormat is supported it's returned 117 return GLES2RTTManager::getSingleton().getSupportedAlternative(format); 118 } 119 120 // Supported 121 return format; 122 } 123 isHardwareFilteringSupported(TextureType ttype,PixelFormat format,int usage,bool preciseFormatOnly)124 bool GLES2TextureManager::isHardwareFilteringSupported(TextureType ttype, PixelFormat format, int usage, 125 bool preciseFormatOnly) 126 { 127 if (format == PF_UNKNOWN) 128 { 129 return false; 130 } 131 132 // Check native format 133 PixelFormat nativeFormat = getNativeFormat(ttype, format, usage); 134 if (preciseFormatOnly && format != nativeFormat) 135 { 136 return false; 137 } 138 139 // Assume non-floating point is supported always 140 if (!PixelUtil::isFloatingPoint(nativeFormat)) 141 { 142 return true; 143 } 144 145 return false; 146 } 147 } 148