1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkLocalMatrixShader.h" 9 10 SkFlattenable* SkLocalMatrixShader::CreateProc(SkReadBuffer& buffer) { 11 SkMatrix lm; 12 buffer.readMatrix(&lm); 13 SkAutoTUnref<SkShader> baseShader(buffer.readShader()); 14 if (!baseShader) { 15 return nullptr; 16 } 17 return baseShader->newWithLocalMatrix(lm); 18 } 19 20 void SkLocalMatrixShader::flatten(SkWriteBuffer& buffer) const { 21 buffer.writeMatrix(this->getLocalMatrix()); 22 buffer.writeFlattenable(fProxyShader.get()); 23 } 24 25 SkShader::Context* SkLocalMatrixShader::onCreateContext(const ContextRec& rec, 26 void* storage) const { 27 ContextRec newRec(rec); 28 SkMatrix tmp; 29 if (rec.fLocalMatrix) { 30 tmp.setConcat(*rec.fLocalMatrix, this->getLocalMatrix()); 31 newRec.fLocalMatrix = &tmp; 32 } else { 33 newRec.fLocalMatrix = &this->getLocalMatrix(); 34 } 35 return fProxyShader->createContext(newRec, storage); 36 } 37 38 #ifndef SK_IGNORE_TO_STRING 39 void SkLocalMatrixShader::toString(SkString* str) const { 40 str->append("SkLocalMatrixShader: ("); 41 42 fProxyShader->toString(str); 43 44 this->INHERITED::toString(str); 45 46 str->append(")"); 47 } 48 #endif 49 50 SkShader* SkShader::newWithLocalMatrix(const SkMatrix& localMatrix) const { 51 if (localMatrix.isIdentity()) { 52 return SkRef(const_cast<SkShader*>(this)); 53 } 54 55 const SkMatrix* lm = &localMatrix; 56 57 SkShader* baseShader = const_cast<SkShader*>(this); 58 SkMatrix otherLocalMatrix; 59 SkAutoTUnref<SkShader> proxy(this->refAsALocalMatrixShader(&otherLocalMatrix)); 60 if (proxy) { 61 otherLocalMatrix.preConcat(localMatrix); 62 lm = &otherLocalMatrix; 63 baseShader = proxy.get(); 64 } 65 66 return new SkLocalMatrixShader(baseShader, *lm); 67 } 68
