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- /*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "src/core/SkTLazy.h"
- #include "src/shaders/SkLocalMatrixShader.h"
- #if SK_SUPPORT_GPU
- #include "src/gpu/GrFragmentProcessor.h"
- #endif
- #if SK_SUPPORT_GPU
- std::unique_ptr<GrFragmentProcessor> SkLocalMatrixShader::asFragmentProcessor(
- const GrFPArgs& args) const {
- return as_SB(fProxyShader)->asFragmentProcessor(
- GrFPArgs::WithPreLocalMatrix(args, this->getLocalMatrix()));
- }
- #endif
- sk_sp<SkFlattenable> SkLocalMatrixShader::CreateProc(SkReadBuffer& buffer) {
- SkMatrix lm;
- buffer.readMatrix(&lm);
- auto baseShader(buffer.readShader());
- if (!baseShader) {
- return nullptr;
- }
- return baseShader->makeWithLocalMatrix(lm);
- }
- void SkLocalMatrixShader::flatten(SkWriteBuffer& buffer) const {
- buffer.writeMatrix(this->getLocalMatrix());
- buffer.writeFlattenable(fProxyShader.get());
- }
- #ifdef SK_ENABLE_LEGACY_SHADERCONTEXT
- SkShaderBase::Context* SkLocalMatrixShader::onMakeContext(
- const ContextRec& rec, SkArenaAlloc* alloc) const
- {
- SkTCopyOnFirstWrite<SkMatrix> lm(this->getLocalMatrix());
- if (rec.fLocalMatrix) {
- lm.writable()->preConcat(*rec.fLocalMatrix);
- }
- ContextRec newRec(rec);
- newRec.fLocalMatrix = lm;
- return as_SB(fProxyShader)->makeContext(newRec, alloc);
- }
- #endif
- SkImage* SkLocalMatrixShader::onIsAImage(SkMatrix* outMatrix, SkTileMode* mode) const {
- SkMatrix imageMatrix;
- SkImage* image = fProxyShader->isAImage(&imageMatrix, mode);
- if (image && outMatrix) {
- // Local matrix must be applied first so it is on the right side of the concat.
- *outMatrix = SkMatrix::Concat(imageMatrix, this->getLocalMatrix());
- }
- return image;
- }
- SkPicture* SkLocalMatrixShader::isAPicture(SkMatrix* matrix,
- SkTileMode tileModes[2],
- SkRect* tile) const {
- SkMatrix proxyMatrix;
- SkPicture* picture = as_SB(fProxyShader)->isAPicture(&proxyMatrix, tileModes, tile);
- if (picture && matrix) {
- *matrix = SkMatrix::Concat(proxyMatrix, this->getLocalMatrix());
- }
- return picture;
- }
- bool SkLocalMatrixShader::onAppendStages(const SkStageRec& rec) const {
- SkTCopyOnFirstWrite<SkMatrix> lm(this->getLocalMatrix());
- if (rec.fLocalM) {
- lm.writable()->preConcat(*rec.fLocalM);
- }
- SkStageRec newRec = rec;
- newRec.fLocalM = lm;
- return as_SB(fProxyShader)->appendStages(newRec);
- }
- sk_sp<SkShader> SkShader::makeWithLocalMatrix(const SkMatrix& localMatrix) const {
- if (localMatrix.isIdentity()) {
- return sk_ref_sp(const_cast<SkShader*>(this));
- }
- const SkMatrix* lm = &localMatrix;
- sk_sp<SkShader> baseShader;
- SkMatrix otherLocalMatrix;
- sk_sp<SkShader> proxy(as_SB(this)->makeAsALocalMatrixShader(&otherLocalMatrix));
- if (proxy) {
- otherLocalMatrix.preConcat(localMatrix);
- lm = &otherLocalMatrix;
- baseShader = proxy;
- } else {
- baseShader = sk_ref_sp(const_cast<SkShader*>(this));
- }
- return sk_make_sp<SkLocalMatrixShader>(std::move(baseShader), *lm);
- }
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