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-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_HWUI_SKIA_COLOR_FILTER_H
-#define ANDROID_HWUI_SKIA_COLOR_FILTER_H
-
-#include <GLES2/gl2.h>
-#include <SkColorFilter.h>
-
-#include <cutils/compiler.h>
-
-#include "ProgramCache.h"
-#include "Extensions.h"
-
-namespace android {
-namespace uirenderer {
-
-///////////////////////////////////////////////////////////////////////////////
-// Base color filter
-///////////////////////////////////////////////////////////////////////////////
-
-/**
- * Represents a Skia color filter. A color filter modifies a ProgramDescription
- * and sets uniforms on the resulting shaders.
- */
-class SkiaColorFilter {
-public:
- /**
- * Type of Skia color filter in use.
- */
- enum Type {
- kNone,
- kColorMatrix,
- kLighting,
- kBlend,
- };
-
- ANDROID_API SkiaColorFilter(SkColorFilter *skFilter, Type type, bool blend);
- virtual ~SkiaColorFilter();
-
- virtual void describe(ProgramDescription& description, const Extensions& extensions) = 0;
- virtual void setupProgram(Program* program) = 0;
-
- inline bool blend() const {
- return mBlend;
- }
-
- Type type() const {
- return mType;
- }
-
- SkColorFilter* getSkColorFilter() {
- return mSkFilter;
- }
-
-protected:
- Type mType;
- bool mBlend;
-
-private:
- SkColorFilter *mSkFilter;
-}; // struct SkiaColorFilter
-
-///////////////////////////////////////////////////////////////////////////////
-// Implementations
-///////////////////////////////////////////////////////////////////////////////
-
-/**
- * A color filter that multiplies the source color with a matrix and adds a vector.
- */
-class SkiaColorMatrixFilter: public SkiaColorFilter {
-public:
- ANDROID_API SkiaColorMatrixFilter(SkColorFilter *skFilter, float* matrix, float* vector);
- ~SkiaColorMatrixFilter();
-
- void describe(ProgramDescription& description, const Extensions& extensions);
- void setupProgram(Program* program);
-
-private:
- float* mMatrix;
- float* mVector;
-}; // struct SkiaColorMatrixFilter
-
-/**
- * A color filters that multiplies the source color with a fixed value and adds
- * another fixed value. Ignores the alpha channel of both arguments.
- */
-class SkiaLightingFilter: public SkiaColorFilter {
-public:
- ANDROID_API SkiaLightingFilter(SkColorFilter *skFilter, int multiply, int add);
-
- void describe(ProgramDescription& description, const Extensions& extensions);
- void setupProgram(Program* program);
-
-private:
- GLfloat mMulR, mMulG, mMulB;
- GLfloat mAddR, mAddG, mAddB;
-}; // struct SkiaLightingFilter
-
-/**
- * A color filters that blends the source color with a specified destination color
- * and PorterDuff blending mode.
- */
-class SkiaBlendFilter: public SkiaColorFilter {
-public:
- ANDROID_API SkiaBlendFilter(SkColorFilter *skFilter, int color, SkXfermode::Mode mode);
-
- void describe(ProgramDescription& description, const Extensions& extensions);
- void setupProgram(Program* program);
-
-private:
- SkXfermode::Mode mMode;
- GLfloat mR, mG, mB, mA;
-}; // struct SkiaBlendFilter
-
-}; // namespace uirenderer
-}; // namespace android
-
-#endif // ANDROID_HWUI_SKIA_COLOR_FILTER_H