1 // Copyright 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CC_RESOURCES_PLATFORM_COLOR_H_ 6 #define CC_RESOURCES_PLATFORM_COLOR_H_ 7 8 #include "base/basictypes.h" 9 #include "base/logging.h" 10 #include "cc/resources/resource_format.h" 11 #include "third_party/khronos/GLES2/gl2.h" 12 #include "third_party/khronos/GLES2/gl2ext.h" 13 #include "third_party/skia/include/core/SkTypes.h" 14 15 namespace cc { 16 17 class PlatformColor { 18 public: 19 enum SourceDataFormat { 20 SOURCE_FORMAT_RGBA8, 21 SOURCE_FORMAT_BGRA8 22 }; 23 Format()24 static SourceDataFormat Format() { 25 return SK_B32_SHIFT ? SOURCE_FORMAT_RGBA8 : SOURCE_FORMAT_BGRA8; 26 } 27 28 // Returns the most efficient texture format for this platform. BestTextureFormat(bool supports_bgra8888)29 static ResourceFormat BestTextureFormat(bool supports_bgra8888) { 30 switch (Format()) { 31 case SOURCE_FORMAT_BGRA8: 32 return (supports_bgra8888) ? BGRA_8888 : RGBA_8888; 33 case SOURCE_FORMAT_RGBA8: 34 return RGBA_8888; 35 } 36 NOTREACHED(); 37 return RGBA_8888; 38 } 39 40 // Return true if the given texture format has the same component order 41 // as the color on this platform. SameComponentOrder(ResourceFormat format)42 static bool SameComponentOrder(ResourceFormat format) { 43 switch (Format()) { 44 case SOURCE_FORMAT_RGBA8: 45 return format == RGBA_8888 || format == RGBA_4444; 46 case SOURCE_FORMAT_BGRA8: 47 return format == BGRA_8888; 48 } 49 NOTREACHED(); 50 return false; 51 } 52 53 private: 54 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformColor); 55 }; 56 57 } // namespace cc 58 59 #endif // CC_RESOURCES_PLATFORM_COLOR_H_ 60