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 "GrGLSLPrimitiveProcessor.h" 9 10 #include "GrCoordTransform.h" 11 #include "glsl/GrGLSLFragmentShaderBuilder.h" 12 #include "glsl/GrGLSLUniformHandler.h" 13 #include "glsl/GrGLSLVertexShaderBuilder.h" 14 15 SkMatrix GrGLSLPrimitiveProcessor::GetTransformMatrix(const SkMatrix& localMatrix, 16 const GrCoordTransform& coordTransform) { 17 SkMatrix combined; 18 combined.setConcat(coordTransform.getMatrix(), localMatrix); 19 if (coordTransform.normalize()) { 20 SkASSERT(coordTransform.texture()); 21 combined.postIDiv(coordTransform.texture()->width(), coordTransform.texture()->height()); 22 } 23 24 if (coordTransform.reverseY()) { 25 // combined.postScale(1,-1); 26 // combined.postTranslate(0,1); 27 combined.set(SkMatrix::kMSkewY, 28 combined[SkMatrix::kMPersp0] - combined[SkMatrix::kMSkewY]); 29 combined.set(SkMatrix::kMScaleY, 30 combined[SkMatrix::kMPersp1] - combined[SkMatrix::kMScaleY]); 31 combined.set(SkMatrix::kMTransY, 32 combined[SkMatrix::kMPersp2] - combined[SkMatrix::kMTransY]); 33 } 34 return combined; 35 } 36 37 void GrGLSLPrimitiveProcessor::setupUniformColor(GrGLSLPPFragmentBuilder* fragBuilder, 38 GrGLSLUniformHandler* uniformHandler, 39 const char* outputName, 40 UniformHandle* colorUniform) { 41 SkASSERT(colorUniform); 42 const char* stagedLocalVarName; 43 *colorUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, 44 kVec4f_GrSLType, 45 kDefault_GrSLPrecision, 46 "Color", 47 &stagedLocalVarName); 48 fragBuilder->codeAppendf("%s = %s;", outputName, stagedLocalVarName); 49 } 50 51 ////////////////////////////////////////////////////////////////////////////// 52 53 const GrCoordTransform* GrGLSLPrimitiveProcessor::FPCoordTransformHandler::nextCoordTransform() { 54 #ifdef SK_DEBUG 55 SkASSERT(nullptr == fCurr || fAddedCoord); 56 fAddedCoord = false; 57 fCurr = fIter.next(); 58 return fCurr; 59 #else 60 return fIter.next(); 61 #endif 62 } 63
