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| 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 "GrGLPrimitiveProcessor.h" |
| 9 |
| 10 #include "builders/GrGLProgramBuilder.h" |
| 11 |
| 12 SkMatrix GrGLPrimitiveProcessor::GetTransformMatrix(const SkMatrix& localMatrix, |
| 13 const GrCoordTransform& coor
dTransform) { |
| 14 SkMatrix combined; |
| 15 // We only apply the localmatrix to localcoords |
| 16 if (kLocal_GrCoordSet == coordTransform.sourceCoords()) { |
| 17 combined.setConcat(coordTransform.getMatrix(), localMatrix); |
| 18 } else { |
| 19 combined = coordTransform.getMatrix(); |
| 20 } |
| 21 if (coordTransform.reverseY()) { |
| 22 // combined.postScale(1,-1); |
| 23 // combined.postTranslate(0,1); |
| 24 combined.set(SkMatrix::kMSkewY, |
| 25 combined[SkMatrix::kMPersp0] - combined[SkMatrix::kMSkewY]); |
| 26 combined.set(SkMatrix::kMScaleY, |
| 27 combined[SkMatrix::kMPersp1] - combined[SkMatrix::kMScaleY]); |
| 28 combined.set(SkMatrix::kMTransY, |
| 29 combined[SkMatrix::kMPersp2] - combined[SkMatrix::kMTransY]); |
| 30 } |
| 31 return combined; |
| 32 } |
| 33 |
| 34 void |
| 35 GrGLPrimitiveProcessor::setupColorPassThrough(GrGLGPBuilder* pb, |
| 36 GrGPInput inputType, |
| 37 const char* outputName, |
| 38 const GrGeometryProcessor::Attribu
te* colorAttr, |
| 39 UniformHandle* colorUniform) { |
| 40 GrGLGPFragmentBuilder* fs = pb->getFragmentShaderBuilder(); |
| 41 if (kUniform_GrGPInput == inputType) { |
| 42 SkASSERT(colorUniform); |
| 43 const char* stagedLocalVarName; |
| 44 *colorUniform = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility, |
| 45 kVec4f_GrSLType, |
| 46 kDefault_GrSLPrecision, |
| 47 "Color", |
| 48 &stagedLocalVarName); |
| 49 fs->codeAppendf("%s = %s;", outputName, stagedLocalVarName); |
| 50 } else if (kAttribute_GrGPInput == inputType) { |
| 51 SkASSERT(colorAttr); |
| 52 pb->addPassThroughAttribute(colorAttr, outputName); |
| 53 } else if (kAllOnes_GrGPInput == inputType) { |
| 54 fs->codeAppendf("%s = vec4(1);", outputName); |
| 55 } |
| 56 } |
| 57 |
| 58 void GrGLPrimitiveProcessor::addUniformViewMatrix(GrGLGPBuilder* pb) { |
| 59 fViewMatrixUniform = pb->addUniform(GrGLProgramBuilder::kVertex_Visibility, |
| 60 kMat33f_GrSLType, kDefault_GrSLPrecision
, |
| 61 "uViewM", |
| 62 &fViewMatrixName); |
| 63 } |
| 64 |
| 65 void GrGLPrimitiveProcessor::setUniformViewMatrix(const GrGLProgramDataManager&
pdman, |
| 66 const SkMatrix& viewMatrix) { |
| 67 if (!fViewMatrix.cheapEqualTo(viewMatrix)) { |
| 68 SkASSERT(fViewMatrixUniform.isValid()); |
| 69 fViewMatrix = viewMatrix; |
| 70 |
| 71 GrGLfloat viewMatrix[3 * 3]; |
| 72 GrGLGetMatrix<3>(viewMatrix, fViewMatrix); |
| 73 pdman.setMatrix3f(fViewMatrixUniform, viewMatrix); |
| 74 } |
| 75 } |
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