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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkColorMatrixFilter.h" | 8 #include "SkColorMatrixFilter.h" |
9 #include "SkColorMatrix.h" | 9 #include "SkColorMatrix.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
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437 kMat44f_GrSLType, kDefault_GrSLP
recision, | 437 kMat44f_GrSLType, kDefault_GrSLP
recision, |
438 "ColorMatrix"); | 438 "ColorMatrix"); |
439 fVectorHandle = builder->addUniform(GrGLProgramBuilder::kFragment_Vi
sibility, | 439 fVectorHandle = builder->addUniform(GrGLProgramBuilder::kFragment_Vi
sibility, |
440 kVec4f_GrSLType, kDefault_GrSLPr
ecision, | 440 kVec4f_GrSLType, kDefault_GrSLPr
ecision, |
441 "ColorMatrixVector"); | 441 "ColorMatrixVector"); |
442 | 442 |
443 if (NULL == inputColor) { | 443 if (NULL == inputColor) { |
444 // could optimize this case, but we aren't for now. | 444 // could optimize this case, but we aren't for now. |
445 inputColor = "vec4(1)"; | 445 inputColor = "vec4(1)"; |
446 } | 446 } |
447 GrGLFPFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder
(); | 447 GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder()
; |
448 // The max() is to guard against 0 / 0 during unpremul when the inco
ming color is | 448 // The max() is to guard against 0 / 0 during unpremul when the inco
ming color is |
449 // transparent black. | 449 // transparent black. |
450 fsBuilder->codeAppendf("\tfloat nonZeroAlpha = max(%s.a, 0.00001);\n
", inputColor); | 450 fsBuilder->codeAppendf("\tfloat nonZeroAlpha = max(%s.a, 0.00001);\n
", inputColor); |
451 fsBuilder->codeAppendf("\t%s = %s * vec4(%s.rgb / nonZeroAlpha, nonZ
eroAlpha) + %s;\n", | 451 fsBuilder->codeAppendf("\t%s = %s * vec4(%s.rgb / nonZeroAlpha, nonZ
eroAlpha) + %s;\n", |
452 outputColor, | 452 outputColor, |
453 builder->getUniformCStr(fMatrixHandle), | 453 builder->getUniformCStr(fMatrixHandle), |
454 inputColor, | 454 inputColor, |
455 builder->getUniformCStr(fVectorHandle)); | 455 builder->getUniformCStr(fVectorHandle)); |
456 fsBuilder->codeAppendf("\t%s = clamp(%s, 0.0, 1.0);\n", outputColor,
outputColor); | 456 fsBuilder->codeAppendf("\t%s = clamp(%s, 0.0, 1.0);\n", outputColor,
outputColor); |
457 fsBuilder->codeAppendf("\t%s.rgb *= %s.a;\n", outputColor, outputCol
or); | 457 fsBuilder->codeAppendf("\t%s.rgb *= %s.a;\n", outputColor, outputCol
or); |
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577 str->append("matrix: ("); | 577 str->append("matrix: ("); |
578 for (int i = 0; i < 20; ++i) { | 578 for (int i = 0; i < 20; ++i) { |
579 str->appendScalar(fMatrix.fMat[i]); | 579 str->appendScalar(fMatrix.fMat[i]); |
580 if (i < 19) { | 580 if (i < 19) { |
581 str->append(", "); | 581 str->append(", "); |
582 } | 582 } |
583 } | 583 } |
584 str->append(")"); | 584 str->append(")"); |
585 } | 585 } |
586 #endif | 586 #endif |
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