121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HWUI_SKIA_SHADER_H
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#define ANDROID_HWUI_SKIA_SHADER_H
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#include <SkShader.h>
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#include <SkXfermode.h>
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#include <GLES2/gl2.h>
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#include <cutils/compiler.h>
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#include "Extensions.h"
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#include "ProgramCache.h"
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#include "TextureCache.h"
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#include "GradientCache.h"
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namespace android {
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namespace uirenderer {
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class Caches;
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class Layer;
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/**
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* Type of Skia shader in use.
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*/
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enum SkiaShaderType {
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kNone_SkiaShaderType,
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kBitmap_SkiaShaderType,
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kGradient_SkiaShaderType,
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kCompose_SkiaShaderType,
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kLayer_SkiaShaderType
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};
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class SkiaShader {
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public:
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static SkiaShaderType getType(const SkShader& shader);
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static void describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader);
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static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
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};
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class InvalidSkiaShader {
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public:
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static void describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader) {
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// This shader is unsupported. Skip it.
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}
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static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions,
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const SkShader& shader) {
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// This shader is unsupported. Skip it.
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}
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};
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/**
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* A shader that draws a layer.
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*/
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class SkiaLayerShader {
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public:
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static void describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader);
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static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
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}; // class SkiaLayerShader
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/**
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* A shader that draws a bitmap.
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*/
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class SkiaBitmapShader {
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public:
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static void describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader);
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static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
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}; // class SkiaBitmapShader
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/**
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* A shader that draws one of three types of gradient, depending on shader param.
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*/
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class SkiaGradientShader {
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public:
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static void describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader);
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static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
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};
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/**
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* A shader that draws two shaders, composited with an xfermode.
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*/
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class SkiaComposeShader {
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public:
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static void describe(Caches* caches, ProgramDescription& description,
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const Extensions& extensions, const SkShader& shader);
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static void setupProgram(Caches* caches, const mat4& modelViewMatrix,
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GLuint* textureUnit, const Extensions& extensions, const SkShader& shader);
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}; // class SkiaComposeShader
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_HWUI_SKIA_SHADER_H
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