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 32namespace android { 33namespace uirenderer { 34 35class Caches; 36class Layer; 37 38/** 39 * Type of Skia shader in use. 40 */ 41enum SkiaShaderType { 42 kNone_SkiaShaderType, 43 kBitmap_SkiaShaderType, 44 kGradient_SkiaShaderType, 45 kCompose_SkiaShaderType, 46 kLayer_SkiaShaderType 47}; 48 49class SkiaShader { 50public: 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 58class InvalidSkiaShader { 59public: 60 static void describe(Caches* caches, ProgramDescription& description, 61 const Extensions& extensions, const SkShader& shader) { 62 // This shader is unsupported. Skip it. 63 } 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 */ 73class SkiaLayerShader { 74public: 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 */ 84class SkiaBitmapShader { 85public: 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 */ 97class SkiaGradientShader { 98public: 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 */ 108class SkiaComposeShader { 109public: 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