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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkString.h"
- #include "include/core/SkUnPreMultiply.h"
- #include "include/effects/SkColorMatrix.h"
- #include "include/private/SkColorData.h"
- #include "include/private/SkNx.h"
- #include "src/core/SkColorFilter_Matrix.h"
- #include "src/core/SkRasterPipeline.h"
- #include "src/core/SkReadBuffer.h"
- #include "src/core/SkWriteBuffer.h"
- void SkColorFilter_Matrix::initState() {
- const float* srcA = fMatrix + 15;
- fFlags = (srcA[0] == 0 && srcA[1] == 0 && srcA[2] == 0 && srcA[3] == 1 && srcA[4] == 0)
- ? kAlphaUnchanged_Flag : 0;
- }
- SkColorFilter_Matrix::SkColorFilter_Matrix(const float array[20]) {
- memcpy(fMatrix, array, 20 * sizeof(float));
- this->initState();
- }
- uint32_t SkColorFilter_Matrix::getFlags() const {
- return this->INHERITED::getFlags() | fFlags;
- }
- void SkColorFilter_Matrix::flatten(SkWriteBuffer& buffer) const {
- SkASSERT(sizeof(fMatrix)/sizeof(float) == 20);
- buffer.writeScalarArray(fMatrix, 20);
- }
- sk_sp<SkFlattenable> SkColorFilter_Matrix::CreateProc(SkReadBuffer& buffer) {
- float matrix[20];
- if (buffer.readScalarArray(matrix, 20)) {
- return SkColorFilters::Matrix(matrix);
- }
- return nullptr;
- }
- bool SkColorFilter_Matrix::onAsAColorMatrix(float matrix[20]) const {
- if (matrix) {
- memcpy(matrix, fMatrix, 20 * sizeof(float));
- }
- return true;
- }
- bool SkColorFilter_Matrix::onAppendStages(const SkStageRec& rec,
- bool shaderIsOpaque) const {
- const bool willStayOpaque = shaderIsOpaque && (fFlags & kAlphaUnchanged_Flag);
- SkRasterPipeline* p = rec.fPipeline;
- if (!shaderIsOpaque) { p->append(SkRasterPipeline::unpremul); }
- if ( true) { p->append(SkRasterPipeline::matrix_4x5, fMatrix); }
- if ( true) { p->append(SkRasterPipeline::clamp_0); }
- if ( true) { p->append(SkRasterPipeline::clamp_1); }
- if (!willStayOpaque) { p->append(SkRasterPipeline::premul); }
- return true;
- }
- #if SK_SUPPORT_GPU
- #include "src/gpu/effects/generated/GrColorMatrixFragmentProcessor.h"
- std::unique_ptr<GrFragmentProcessor> SkColorFilter_Matrix::asFragmentProcessor(
- GrRecordingContext*, const GrColorSpaceInfo&) const {
- return GrColorMatrixFragmentProcessor::Make(fMatrix,
- /* premulInput = */ true,
- /* clampRGBOutput = */ true,
- /* premulOutput = */ true);
- }
- #endif
- ///////////////////////////////////////////////////////////////////////////////
- sk_sp<SkColorFilter> SkColorFilters::Matrix(const float array[20]) {
- if (!sk_floats_are_finite(array, 20)) {
- return nullptr;
- }
- return sk_sp<SkColorFilter>(new SkColorFilter_Matrix(array));
- }
- sk_sp<SkColorFilter> SkColorFilters::Matrix(const SkColorMatrix& cm) {
- return Matrix(cm.fMat);
- }
- void SkColorFilter_Matrix::RegisterFlattenables() {
- SK_REGISTER_FLATTENABLE(SkColorFilter_Matrix);
- // This subclass was removed 4/2019
- SkFlattenable::Register("SkColorMatrixFilterRowMajor255",
- [](SkReadBuffer& buffer) -> sk_sp<SkFlattenable> {
- float matrix[20];
- if (buffer.readScalarArray(matrix, 20)) {
- matrix[ 4] *= (1.0f/255);
- matrix[ 9] *= (1.0f/255);
- matrix[14] *= (1.0f/255);
- matrix[19] *= (1.0f/255);
- return SkColorFilters::Matrix(matrix);
- }
- return nullptr;
- });
- }
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