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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 "GrDashingEffect.h" | 8 #include "GrDashingEffect.h" |
9 | 9 |
10 #include "../GrAARectRenderer.h" | 10 #include "../GrAARectRenderer.h" |
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513 kVec3f_GrSLType, | 513 kVec3f_GrSLType, |
514 "params", | 514 "params", |
515 ¶mName); | 515 ¶mName); |
516 | 516 |
517 GrGLVertToFrag v(kVec2f_GrSLType); | 517 GrGLVertToFrag v(kVec2f_GrSLType); |
518 args.fPB->addVarying("Coord", &v); | 518 args.fPB->addVarying("Coord", &v); |
519 | 519 |
520 GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); | 520 GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); |
521 vsBuilder->codeAppendf("\t%s = %s;\n", v.vsOut(), dce.inCoord().c_str()); | 521 vsBuilder->codeAppendf("\t%s = %s;\n", v.vsOut(), dce.inCoord().c_str()); |
522 | 522 |
| 523 // setup position varying |
| 524 vsBuilder->codeAppendf("%s = %s * vec3(%s, 1);", vsBuilder->glPosition(), vs
Builder->uViewM(), |
| 525 vsBuilder->inPosition()); |
| 526 |
523 // transforms all points so that we can compare them to our test circle | 527 // transforms all points so that we can compare them to our test circle |
524 GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); | 528 GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
525 fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s.z) * %s.
z;\n", | 529 fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s.z) * %s.
z;\n", |
526 v.fsIn(), v.fsIn(), paramName, paramName); | 530 v.fsIn(), v.fsIn(), paramName, paramName); |
527 fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n",
v.fsIn()); | 531 fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n",
v.fsIn()); |
528 fsBuilder->codeAppendf("\t\tvec2 center = vec2(%s.y, 0.0);\n", paramName); | 532 fsBuilder->codeAppendf("\t\tvec2 center = vec2(%s.y, 0.0);\n", paramName); |
529 fsBuilder->codeAppend("\t\tfloat dist = length(center - fragPosShifted);\n")
; | 533 fsBuilder->codeAppend("\t\tfloat dist = length(center - fragPosShifted);\n")
; |
530 if (GrProcessorEdgeTypeIsAA(dce.getEdgeType())) { | 534 if (GrProcessorEdgeTypeIsAA(dce.getEdgeType())) { |
531 fsBuilder->codeAppendf("\t\tfloat diff = dist - %s.x;\n", paramName); | 535 fsBuilder->codeAppendf("\t\tfloat diff = dist - %s.x;\n", paramName); |
532 fsBuilder->codeAppend("\t\tdiff = 1.0 - diff;\n"); | 536 fsBuilder->codeAppend("\t\tdiff = 1.0 - diff;\n"); |
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716 fIntervalUniform = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibi
lity, | 720 fIntervalUniform = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibi
lity, |
717 kFloat_GrSLType, | 721 kFloat_GrSLType, |
718 "interval", | 722 "interval", |
719 &intervalName); | 723 &intervalName); |
720 | 724 |
721 GrGLVertToFrag v(kVec2f_GrSLType); | 725 GrGLVertToFrag v(kVec2f_GrSLType); |
722 args.fPB->addVarying("Coord", &v); | 726 args.fPB->addVarying("Coord", &v); |
723 GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); | 727 GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder(); |
724 vsBuilder->codeAppendf("\t%s = %s;\n", v.vsOut(), de.inCoord().c_str()); | 728 vsBuilder->codeAppendf("\t%s = %s;\n", v.vsOut(), de.inCoord().c_str()); |
725 | 729 |
| 730 // setup position varying |
| 731 vsBuilder->codeAppendf("%s = %s * vec3(%s, 1);", vsBuilder->glPosition(), vs
Builder->uViewM(), |
| 732 vsBuilder->inPosition()); |
| 733 |
726 // transforms all points so that we can compare them to our test rect | 734 // transforms all points so that we can compare them to our test rect |
727 GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); | 735 GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
728 fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s) * %s;\n
", | 736 fsBuilder->codeAppendf("\t\tfloat xShifted = %s.x - floor(%s.x / %s) * %s;\n
", |
729 v.fsIn(), v.fsIn(), intervalName, intervalName); | 737 v.fsIn(), v.fsIn(), intervalName, intervalName); |
730 fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n",
v.fsIn()); | 738 fsBuilder->codeAppendf("\t\tvec2 fragPosShifted = vec2(xShifted, %s.y);\n",
v.fsIn()); |
731 if (GrProcessorEdgeTypeIsAA(de.getEdgeType())) { | 739 if (GrProcessorEdgeTypeIsAA(de.getEdgeType())) { |
732 // The amount of coverage removed in x and y by the edges is computed as
a pair of negative | 740 // The amount of coverage removed in x and y by the edges is computed as
a pair of negative |
733 // numbers, xSub and ySub. | 741 // numbers, xSub and ySub. |
734 fsBuilder->codeAppend("\t\tfloat xSub, ySub;\n"); | 742 fsBuilder->codeAppend("\t\tfloat xSub, ySub;\n"); |
735 fsBuilder->codeAppendf("\t\txSub = min(fragPosShifted.x - %s.x, 0.0);\n"
, rectName); | 743 fsBuilder->codeAppendf("\t\txSub = min(fragPosShifted.x - %s.x, 0.0);\n"
, rectName); |
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841 switch (cap) { | 849 switch (cap) { |
842 case GrDashingEffect::kRound_DashCap: | 850 case GrDashingEffect::kRound_DashCap: |
843 return DashingCircleEffect::Create(edgeType, info, SkScalarHalf(stro
keWidth)); | 851 return DashingCircleEffect::Create(edgeType, info, SkScalarHalf(stro
keWidth)); |
844 case GrDashingEffect::kNonRound_DashCap: | 852 case GrDashingEffect::kNonRound_DashCap: |
845 return DashingLineEffect::Create(edgeType, info, strokeWidth); | 853 return DashingLineEffect::Create(edgeType, info, strokeWidth); |
846 default: | 854 default: |
847 SkFAIL("Unexpected dashed cap."); | 855 SkFAIL("Unexpected dashed cap."); |
848 } | 856 } |
849 return NULL; | 857 return NULL; |
850 } | 858 } |
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