1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HWUI_SKIA_SHADER_H 18 #define ANDROID_HWUI_SKIA_SHADER_H 19 20 #include <SkShader.h> 21 #include <SkXfermode.h> 22 23 #include <GLES2/gl2.h> 24 25 #include <cutils/compiler.h> 26 27 #include "Extensions.h" 28 #include "ProgramCache.h" 29 #include "TextureCache.h" 30 #include "GradientCache.h" 31 32 namespace android { 33 namespace uirenderer { 34 35 class Caches; 36 class Layer; 37 38 /** 39 * Type of Skia shader in use. 40 */ 41 enum SkiaShaderType { 42 kNone_SkiaShaderType, 43 kBitmap_SkiaShaderType, 44 kGradient_SkiaShaderType, 45 kCompose_SkiaShaderType, 46 kLayer_SkiaShaderType 47 }; 48 49 class SkiaShader { 50 public: 51 static SkiaShaderType getType(const SkShader& shader); 52 static void describe(Caches* caches, ProgramDescription& description, 53 const Extensions& extensions, const SkShader& shader); 54 static void setupProgram(Caches* caches, const mat4& modelViewMatrix, 55 GLuint* textureUnit, const Extensions& extensions, const SkShader& shader); 56 }; 57 58 class InvalidSkiaShader { 59 public: describe(Caches * caches,ProgramDescription & description,const Extensions & extensions,const SkShader & shader)60 static void describe(Caches* caches, ProgramDescription& description, 61 const Extensions& extensions, const SkShader& shader) { 62 // This shader is unsupported. Skip it. 63 } setupProgram(Caches * caches,const mat4 & modelViewMatrix,GLuint * textureUnit,const Extensions & extensions,const SkShader & shader)64 static void setupProgram(Caches* caches, const mat4& modelViewMatrix, 65 GLuint* textureUnit, const Extensions& extensions, const SkShader& shader) { 66 // This shader is unsupported. Skip it. 67 } 68 69 }; 70 /** 71 * A shader that draws a layer. 72 */ 73 class SkiaLayerShader { 74 public: 75 static void describe(Caches* caches, ProgramDescription& description, 76 const Extensions& extensions, const SkShader& shader); 77 static void setupProgram(Caches* caches, const mat4& modelViewMatrix, 78 GLuint* textureUnit, const Extensions& extensions, const SkShader& shader); 79 }; // class SkiaLayerShader 80 81 /** 82 * A shader that draws a bitmap. 83 */ 84 class SkiaBitmapShader { 85 public: 86 static void describe(Caches* caches, ProgramDescription& description, 87 const Extensions& extensions, const SkShader& shader); 88 static void setupProgram(Caches* caches, const mat4& modelViewMatrix, 89 GLuint* textureUnit, const Extensions& extensions, const SkShader& shader); 90 91 92 }; // class SkiaBitmapShader 93 94 /** 95 * A shader that draws one of three types of gradient, depending on shader param. 96 */ 97 class SkiaGradientShader { 98 public: 99 static void describe(Caches* caches, ProgramDescription& description, 100 const Extensions& extensions, const SkShader& shader); 101 static void setupProgram(Caches* caches, const mat4& modelViewMatrix, 102 GLuint* textureUnit, const Extensions& extensions, const SkShader& shader); 103 }; 104 105 /** 106 * A shader that draws two shaders, composited with an xfermode. 107 */ 108 class SkiaComposeShader { 109 public: 110 static void describe(Caches* caches, ProgramDescription& description, 111 const Extensions& extensions, const SkShader& shader); 112 static void setupProgram(Caches* caches, const mat4& modelViewMatrix, 113 GLuint* textureUnit, const Extensions& extensions, const SkShader& shader); 114 }; // class SkiaComposeShader 115 116 }; // namespace uirenderer 117 }; // namespace android 118 119 #endif // ANDROID_HWUI_SKIA_SHADER_H 120