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 "FloatColor.h" 21 #include "Matrix.h" 22 23 #include <GLES2/gl2.h> 24 #include <SkShader.h> 25 #include <cutils/compiler.h> 26 27 namespace android { 28 namespace uirenderer { 29 30 class Caches; 31 class Extensions; 32 class Texture; 33 struct ProgramDescription; 34 35 /** 36 * Type of Skia shader in use. 37 * 38 * Note that kBitmap | kGradient = kCompose, since Compose implies 39 * both its component types are in use simultaneously. No other 40 * composition of multiple types is supported. 41 */ 42 enum SkiaShaderType { 43 kNone_SkiaShaderType = 0, 44 kBitmap_SkiaShaderType = 1, 45 kGradient_SkiaShaderType = 2, 46 kCompose_SkiaShaderType = kBitmap_SkiaShaderType | kGradient_SkiaShaderType, 47 }; 48 49 struct SkiaShaderData { 50 SkiaShaderType skiaShaderType; 51 struct BitmapShaderData { 52 Texture* bitmapTexture; 53 GLuint bitmapSampler; 54 GLenum wrapS; 55 GLenum wrapT; 56 57 Matrix4 textureTransform; 58 float textureDimension[2]; 59 } bitmapData; 60 struct GradientShaderData { 61 Matrix4 screenSpace; 62 63 // simple gradient 64 FloatColor startColor; 65 FloatColor endColor; 66 67 // complex gradient 68 Texture* gradientTexture; 69 GLuint gradientSampler; 70 GLenum wrapST; 71 } gradientData; 72 }; 73 74 class SkiaShader { 75 public: 76 static void store(Caches& caches, const SkShader& shader, const Matrix4& modelViewMatrix, 77 GLuint* textureUnit, ProgramDescription* description, 78 SkiaShaderData* outData); 79 static void apply(Caches& caches, const SkiaShaderData& data, 80 const GLsizei width, const GLsizei height); 81 }; 82 83 }; // namespace uirenderer 84 }; // namespace android 85 86 #endif // ANDROID_HWUI_SKIA_SHADER_H 87