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 SkLocalMatrixShader::SkLocalMatrixShader(SkReadBuffer& buffer) : INHERITED(buffer) { 11 fProxyShader.reset(buffer.readShader()); 12 if (NULL == fProxyShader.get()) { 13 sk_throw(); 14 } 15 } 16 17 void SkLocalMatrixShader::flatten(SkWriteBuffer& buffer) const { 18 this->INHERITED::flatten(buffer); 19 buffer.writeFlattenable(fProxyShader.get()); 20 } 21 22 SkShader::Context* SkLocalMatrixShader::onCreateContext(const ContextRec& rec, 23 void* storage) const { 24 ContextRec newRec(rec); 25 SkMatrix tmp; 26 if (rec.fLocalMatrix) { 27 tmp.setConcat(this->getLocalMatrix(), *rec.fLocalMatrix); 28 newRec.fLocalMatrix = &tmp; 29 } else { 30 newRec.fLocalMatrix = &this->getLocalMatrix(); 31 } 32 return fProxyShader->createContext(newRec, storage); 33 } 34 35 #ifndef SK_IGNORE_TO_STRING 36 void SkLocalMatrixShader::toString(SkString* str) const { 37 str->append("SkLocalMatrixShader: ("); 38 39 fProxyShader->toString(str); 40 41 this->INHERITED::toString(str); 42 43 str->append(")"); 44 } 45 #endif 46 47 SkShader* SkShader::CreateLocalMatrixShader(SkShader* proxy, const SkMatrix& localMatrix) { 48 if (localMatrix.isIdentity()) { 49 return SkRef(proxy); 50 } 51 52 const SkMatrix* lm = &localMatrix; 53 54 SkMatrix otherLocalMatrix; 55 SkAutoTUnref<SkShader> otherProxy(proxy->refAsALocalMatrixShader(&otherLocalMatrix)); 56 if (otherProxy.get()) { 57 otherLocalMatrix.preConcat(localMatrix); 58 lm = &otherLocalMatrix; 59 proxy = otherProxy.get(); 60 } 61 62 return SkNEW_ARGS(SkLocalMatrixShader, (proxy, *lm)); 63 } 64
