SkiaColorFilter.cpp revision ad93c2bb63dfc813b2eefa1043aa63afbddce655 
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#include "SkiaColorFilter.h"
18
19namespace android {
20namespace uirenderer {
21
22///////////////////////////////////////////////////////////////////////////////
23// Base color filter
24///////////////////////////////////////////////////////////////////////////////
25
26SkiaColorFilter::SkiaColorFilter(SkColorFilter *skFilter, Type type, bool blend):
27        mType(type), mBlend(blend), mSkFilter(skFilter) {
28}
29
30SkiaColorFilter::~SkiaColorFilter() {
31}
32
33///////////////////////////////////////////////////////////////////////////////
34// Color matrix filter
35///////////////////////////////////////////////////////////////////////////////
36
37SkiaColorMatrixFilter::SkiaColorMatrixFilter(SkColorFilter *skFilter, float* matrix, float* vector):
38        SkiaColorFilter(skFilter, kColorMatrix, true), mMatrix(matrix), mVector(vector) {
39}
40
41SkiaColorMatrixFilter::~SkiaColorMatrixFilter() {
42    delete[] mMatrix;
43    delete[] mVector;
44}
45
46void SkiaColorMatrixFilter::describe(ProgramDescription& description,
47        const Extensions& extensions) {
48    description.colorOp = ProgramDescription::kColorMatrix;
49}
50
51void SkiaColorMatrixFilter::setupProgram(Program* program) {
52    glUniformMatrix4fv(program->getUniform("colorMatrix"), 1, GL_FALSE, &mMatrix[0]);
53    glUniform4fv(program->getUniform("colorMatrixVector"), 1, mVector);
54}
55
56///////////////////////////////////////////////////////////////////////////////
57// Lighting color filter
58///////////////////////////////////////////////////////////////////////////////
59
60SkiaLightingFilter::SkiaLightingFilter(SkColorFilter *skFilter, int multiply, int add):
61        SkiaColorFilter(skFilter, kLighting, true) {
62    mMulR = ((multiply >> 16) & 0xFF) / 255.0f;
63    mMulG = ((multiply >>  8) & 0xFF) / 255.0f;
64    mMulB = ((multiply      ) & 0xFF) / 255.0f;
65
66    mAddR = ((add >> 16) & 0xFF) / 255.0f;
67    mAddG = ((add >>  8) & 0xFF) / 255.0f;
68    mAddB = ((add      ) & 0xFF) / 255.0f;
69}
70
71void SkiaLightingFilter::describe(ProgramDescription& description, const Extensions& extensions) {
72    description.colorOp = ProgramDescription::kColorLighting;
73}
74
75void SkiaLightingFilter::setupProgram(Program* program) {
76    glUniform4f(program->getUniform("lightingMul"), mMulR, mMulG, mMulB, 1.0f);
77    glUniform4f(program->getUniform("lightingAdd"), mAddR, mAddG, mAddB, 0.0f);
78}
79
80///////////////////////////////////////////////////////////////////////////////
81// Blend color filter
82///////////////////////////////////////////////////////////////////////////////
83
84SkiaBlendFilter::SkiaBlendFilter(SkColorFilter *skFilter, int color, SkXfermode::Mode mode):
85        SkiaColorFilter(skFilter, kBlend, true), mMode(mode) {
86    const int alpha = (color >> 24) & 0xFF;
87    mA = alpha / 255.0f;
88    mR = mA * ((color >> 16) & 0xFF) / 255.0f;
89    mG = mA * ((color >>  8) & 0xFF) / 255.0f;
90    mB = mA * ((color      ) & 0xFF) / 255.0f;
91}
92
93void SkiaBlendFilter::describe(ProgramDescription& description, const Extensions& extensions) {
94    description.colorOp = ProgramDescription::kColorBlend;
95    description.colorMode = mMode;
96}
97
98void SkiaBlendFilter::setupProgram(Program* program) {
99    glUniform4f(program->getUniform("colorBlend"), mR, mG, mB, mA);
100}
101
102}; // namespace uirenderer
103}; // namespace android
104