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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 "glsl/GrGLSLProgramBuilder.h" | |
11 #include "glsl/GrGLSLFragmentShaderBuilder.h" | |
12 | |
13 SkMatrix GrGLPrimitiveProcessor::GetTransformMatrix(const SkMatrix& localMatrix, | |
14 const GrCoordTransform& coor
dTransform) { | |
15 SkMatrix combined; | |
16 // We only apply the localmatrix to localcoords | |
17 if (kLocal_GrCoordSet == coordTransform.sourceCoords()) { | |
18 combined.setConcat(coordTransform.getMatrix(), localMatrix); | |
19 } else { | |
20 combined = coordTransform.getMatrix(); | |
21 } | |
22 if (coordTransform.reverseY()) { | |
23 // combined.postScale(1,-1); | |
24 // combined.postTranslate(0,1); | |
25 combined.set(SkMatrix::kMSkewY, | |
26 combined[SkMatrix::kMPersp0] - combined[SkMatrix::kMSkewY]); | |
27 combined.set(SkMatrix::kMScaleY, | |
28 combined[SkMatrix::kMPersp1] - combined[SkMatrix::kMScaleY]); | |
29 combined.set(SkMatrix::kMTransY, | |
30 combined[SkMatrix::kMPersp2] - combined[SkMatrix::kMTransY]); | |
31 } | |
32 return combined; | |
33 } | |
34 | |
35 void GrGLPrimitiveProcessor::setupUniformColor(GrGLSLGPBuilder* pb, | |
36 const char* outputName, | |
37 UniformHandle* colorUniform) { | |
38 GrGLSLFragmentBuilder* fs = pb->getFragmentShaderBuilder(); | |
39 SkASSERT(colorUniform); | |
40 const char* stagedLocalVarName; | |
41 *colorUniform = pb->addUniform(GrGLSLProgramBuilder::kFragment_Visibility, | |
42 kVec4f_GrSLType, | |
43 kDefault_GrSLPrecision, | |
44 "Color", | |
45 &stagedLocalVarName); | |
46 fs->codeAppendf("%s = %s;", outputName, stagedLocalVarName); | |
47 } | |
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