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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.
*/
#include "SkiaColorFilter.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Base color filter
///////////////////////////////////////////////////////////////////////////////
SkiaColorFilter::SkiaColorFilter(SkColorFilter *skFilter, Type type, bool blend):
mType(type), mBlend(blend), mSkFilter(skFilter) {
}
SkiaColorFilter::~SkiaColorFilter() {
}
///////////////////////////////////////////////////////////////////////////////
// Color matrix filter
///////////////////////////////////////////////////////////////////////////////
SkiaColorMatrixFilter::SkiaColorMatrixFilter(SkColorFilter* skFilter, float* matrix, float* vector):
SkiaColorFilter(skFilter, kColorMatrix, true), mMatrix(matrix), mVector(vector) {
// Skia uses the range [0..255] for the addition vector, but we need
// the [0..1] range to apply the vector in GLSL
for (int i = 0; i < 4; i++) {
mVector[i] /= 255.0f;
}
// TODO: We should be smarter about this
mBlend = true;
}
SkiaColorMatrixFilter::~SkiaColorMatrixFilter() {
delete[] mMatrix;
delete[] mVector;
}
void SkiaColorMatrixFilter::describe(ProgramDescription& description,
const Extensions& extensions) {
description.colorOp = ProgramDescription::kColorMatrix;
}
void SkiaColorMatrixFilter::setupProgram(Program* program) {
glUniformMatrix4fv(program->getUniform("colorMatrix"), 1, GL_FALSE, &mMatrix[0]);
glUniform4fv(program->getUniform("colorMatrixVector"), 1, mVector);
}
///////////////////////////////////////////////////////////////////////////////
// Lighting color filter
///////////////////////////////////////////////////////////////////////////////
SkiaLightingFilter::SkiaLightingFilter(SkColorFilter* skFilter, int multiply, int add):
SkiaColorFilter(skFilter, kLighting, true) {
mMulR = ((multiply >> 16) & 0xFF) / 255.0f;
mMulG = ((multiply >> 8) & 0xFF) / 255.0f;
mMulB = ((multiply ) & 0xFF) / 255.0f;
mAddR = ((add >> 16) & 0xFF) / 255.0f;
mAddG = ((add >> 8) & 0xFF) / 255.0f;
mAddB = ((add ) & 0xFF) / 255.0f;
// A lighting filter always ignores alpha
mBlend = false;
}
void SkiaLightingFilter::describe(ProgramDescription& description, const Extensions& extensions) {
description.colorOp = ProgramDescription::kColorLighting;
}
void SkiaLightingFilter::setupProgram(Program* program) {
glUniform4f(program->getUniform("lightingMul"), mMulR, mMulG, mMulB, 1.0f);
glUniform4f(program->getUniform("lightingAdd"), mAddR, mAddG, mAddB, 0.0f);
}
///////////////////////////////////////////////////////////////////////////////
// Blend color filter
///////////////////////////////////////////////////////////////////////////////
SkiaBlendFilter::SkiaBlendFilter(SkColorFilter* skFilter, int color, SkXfermode::Mode mode):
SkiaColorFilter(skFilter, kBlend, true), mMode(mode) {
const int alpha = (color >> 24) & 0xFF;
mA = alpha / 255.0f;
mR = mA * ((color >> 16) & 0xFF) / 255.0f;
mG = mA * ((color >> 8) & 0xFF) / 255.0f;
mB = mA * ((color ) & 0xFF) / 255.0f;
// TODO: We should do something smarter here
mBlend = true;
}
void SkiaBlendFilter::describe(ProgramDescription& description, const Extensions& extensions) {
description.colorOp = ProgramDescription::kColorBlend;
description.colorMode = mMode;
}
void SkiaBlendFilter::setupProgram(Program* program) {
glUniform4f(program->getUniform("colorBlend"), mR, mG, mB, mA);
}
}; // namespace uirenderer
}; // namespace android
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