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Side by Side Diff: src/effects/gradients/SkTwoPointRadialGradient.cpp

Issue 491673002: Initial refactor of shaderbuilder (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 6 years, 4 months ago
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1 1
2 /* 2 /*
3 * Copyright 2012 Google Inc. 3 * Copyright 2012 Google Inc.
4 * 4 *
5 * Use of this source code is governed by a BSD-style license that can be 5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file. 6 * found in the LICENSE file.
7 */ 7 */
8 8
9 #include "SkTwoPointRadialGradient.h" 9 #include "SkTwoPointRadialGradient.h"
10 10
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391 391
392 fPtsToUnit.setTranslate(-fCenter1.fX, -fCenter1.fY); 392 fPtsToUnit.setTranslate(-fCenter1.fX, -fCenter1.fY);
393 fPtsToUnit.postScale(inv, inv); 393 fPtsToUnit.postScale(inv, inv);
394 } 394 }
395 395
396 ///////////////////////////////////////////////////////////////////// 396 /////////////////////////////////////////////////////////////////////
397 397
398 #if SK_SUPPORT_GPU 398 #if SK_SUPPORT_GPU
399 399
400 #include "GrTBackendEffectFactory.h" 400 #include "GrTBackendEffectFactory.h"
401 #include "gl/GrGLShaderBuilder.h" 401 #include "gl/builders/GrGLProgramBuilder.h"
402 #include "SkGr.h" 402 #include "SkGr.h"
403 403
404 // For brevity 404 // For brevity
405 typedef GrGLProgramDataManager::UniformHandle UniformHandle; 405 typedef GrGLProgramDataManager::UniformHandle UniformHandle;
406 406
407 class GrGLRadial2Gradient : public GrGLGradientEffect { 407 class GrGLRadial2Gradient : public GrGLGradientEffect {
408 408
409 public: 409 public:
410 410
411 GrGLRadial2Gradient(const GrBackendEffectFactory& factory, const GrDrawEffec t&); 411 GrGLRadial2Gradient(const GrBackendEffectFactory& factory, const GrDrawEffec t&);
412 virtual ~GrGLRadial2Gradient() { } 412 virtual ~GrGLRadial2Gradient() { }
413 413
414 virtual void emitCode(GrGLShaderBuilder*, 414 virtual void emitCode(GrGLProgramBuilder*,
415 const GrDrawEffect&, 415 const GrDrawEffect&,
416 const GrEffectKey&, 416 const GrEffectKey&,
417 const char* outputColor, 417 const char* outputColor,
418 const char* inputColor, 418 const char* inputColor,
419 const TransformedCoordsArray&, 419 const TransformedCoordsArray&,
420 const TextureSamplerArray&) SK_OVERRIDE; 420 const TextureSamplerArray&) SK_OVERRIDE;
421 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_ OVERRIDE; 421 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_ OVERRIDE;
422 422
423 static void GenKey(const GrDrawEffect&, const GrGLCaps& caps, GrEffectKeyBui lder* b); 423 static void GenKey(const GrDrawEffect&, const GrGLCaps& caps, GrEffectKeyBui lder* b);
424 424
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560 , fVSVaryingName(NULL) 560 , fVSVaryingName(NULL)
561 , fFSVaryingName(NULL) 561 , fFSVaryingName(NULL)
562 , fCachedCenter(SK_ScalarMax) 562 , fCachedCenter(SK_ScalarMax)
563 , fCachedRadius(-SK_ScalarMax) 563 , fCachedRadius(-SK_ScalarMax)
564 , fCachedPosRoot(0) { 564 , fCachedPosRoot(0) {
565 565
566 const GrRadial2Gradient& data = drawEffect.castEffect<GrRadial2Gradient>(); 566 const GrRadial2Gradient& data = drawEffect.castEffect<GrRadial2Gradient>();
567 fIsDegenerate = data.isDegenerate(); 567 fIsDegenerate = data.isDegenerate();
568 } 568 }
569 569
570 void GrGLRadial2Gradient::emitCode(GrGLShaderBuilder* builder, 570 void GrGLRadial2Gradient::emitCode(GrGLProgramBuilder* builder,
571 const GrDrawEffect& drawEffect, 571 const GrDrawEffect& drawEffect,
572 const GrEffectKey& key, 572 const GrEffectKey& key,
573 const char* outputColor, 573 const char* outputColor,
574 const char* inputColor, 574 const char* inputColor,
575 const TransformedCoordsArray& coords, 575 const TransformedCoordsArray& coords,
576 const TextureSamplerArray& samplers) { 576 const TextureSamplerArray& samplers) {
577 uint32_t baseKey = key.get32(0); 577 uint32_t baseKey = key.get32(0);
578 this->emitUniforms(builder, baseKey); 578 this->emitUniforms(builder, baseKey);
579 fParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_Visibility , 579 fParamUni = builder->addUniformArray(GrGLProgramBuilder::kFragment_Visibilit y,
580 kFloat_GrSLType, "Radial2FSParams", 6); 580 kFloat_GrSLType, "Radial2FSParams", 6);
581 581
582 SkString cName("c"); 582 SkString cName("c");
583 SkString ac4Name("ac4"); 583 SkString ac4Name("ac4");
584 SkString rootName("root"); 584 SkString rootName("root");
585 SkString t; 585 SkString t;
586 SkString p0; 586 SkString p0;
587 SkString p1; 587 SkString p1;
588 SkString p2; 588 SkString p2;
589 SkString p3; 589 SkString p3;
590 SkString p4; 590 SkString p4;
591 SkString p5; 591 SkString p5;
592 builder->getUniformVariable(fParamUni).appendArrayAccess(0, &p0); 592 builder->getUniformVariable(fParamUni).appendArrayAccess(0, &p0);
593 builder->getUniformVariable(fParamUni).appendArrayAccess(1, &p1); 593 builder->getUniformVariable(fParamUni).appendArrayAccess(1, &p1);
594 builder->getUniformVariable(fParamUni).appendArrayAccess(2, &p2); 594 builder->getUniformVariable(fParamUni).appendArrayAccess(2, &p2);
595 builder->getUniformVariable(fParamUni).appendArrayAccess(3, &p3); 595 builder->getUniformVariable(fParamUni).appendArrayAccess(3, &p3);
596 builder->getUniformVariable(fParamUni).appendArrayAccess(4, &p4); 596 builder->getUniformVariable(fParamUni).appendArrayAccess(4, &p4);
597 builder->getUniformVariable(fParamUni).appendArrayAccess(5, &p5); 597 builder->getUniformVariable(fParamUni).appendArrayAccess(5, &p5);
598 598
599 GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder();
599 // We interpolate the linear component in coords[1]. 600 // We interpolate the linear component in coords[1].
600 SkASSERT(coords[0].type() == coords[1].type()); 601 SkASSERT(coords[0].type() == coords[1].type());
601 const char* coords2D; 602 const char* coords2D;
602 SkString bVar; 603 SkString bVar;
603 if (kVec3f_GrSLType == coords[0].type()) { 604 if (kVec3f_GrSLType == coords[0].type()) {
604 builder->fsCodeAppendf("\tvec3 interpolants = vec3(%s.xy, %s.x) / %s.z;\ n", 605 fsBuilder->codeAppendf("\tvec3 interpolants = vec3(%s.xy, %s.x) / %s.z;\ n",
605 coords[0].c_str(), coords[1].c_str(), coords[0].c _str()); 606 coords[0].c_str(), coords[1].c_str(), coords[0].c _str());
606 coords2D = "interpolants.xy"; 607 coords2D = "interpolants.xy";
607 bVar = "interpolants.z"; 608 bVar = "interpolants.z";
608 } else { 609 } else {
609 coords2D = coords[0].c_str(); 610 coords2D = coords[0].c_str();
610 bVar.printf("%s.x", coords[1].c_str()); 611 bVar.printf("%s.x", coords[1].c_str());
611 } 612 }
612 613
613 // c = (x^2)+(y^2) - params[4] 614 // c = (x^2)+(y^2) - params[4]
614 builder->fsCodeAppendf("\tfloat %s = dot(%s, %s) - %s;\n", 615 fsBuilder->codeAppendf("\tfloat %s = dot(%s, %s) - %s;\n",
615 cName.c_str(), coords2D, coords2D, p4.c_str()); 616 cName.c_str(), coords2D, coords2D, p4.c_str());
616 617
617 // If we aren't degenerate, emit some extra code, and accept a slightly 618 // If we aren't degenerate, emit some extra code, and accept a slightly
618 // more complex coord. 619 // more complex coord.
619 if (!fIsDegenerate) { 620 if (!fIsDegenerate) {
620 621
621 // ac4 = 4.0 * params[0] * c 622 // ac4 = 4.0 * params[0] * c
622 builder->fsCodeAppendf("\tfloat %s = %s * 4.0 * %s;\n", 623 fsBuilder->codeAppendf("\tfloat %s = %s * 4.0 * %s;\n",
623 ac4Name.c_str(), p0.c_str(), 624 ac4Name.c_str(), p0.c_str(),
624 cName.c_str()); 625 cName.c_str());
625 626
626 // root = sqrt(b^2-4ac) 627 // root = sqrt(b^2-4ac)
627 // (abs to avoid exception due to fp precision) 628 // (abs to avoid exception due to fp precision)
628 builder->fsCodeAppendf("\tfloat %s = sqrt(abs(%s*%s - %s));\n", 629 fsBuilder->codeAppendf("\tfloat %s = sqrt(abs(%s*%s - %s));\n",
629 rootName.c_str(), bVar.c_str(), bVar.c_str(), 630 rootName.c_str(), bVar.c_str(), bVar.c_str(),
630 ac4Name.c_str()); 631 ac4Name.c_str());
631 632
632 // t is: (-b + params[5] * sqrt(b^2-4ac)) * params[1] 633 // t is: (-b + params[5] * sqrt(b^2-4ac)) * params[1]
633 t.printf("(-%s + %s * %s) * %s", bVar.c_str(), p5.c_str(), 634 t.printf("(-%s + %s * %s) * %s", bVar.c_str(), p5.c_str(),
634 rootName.c_str(), p1.c_str()); 635 rootName.c_str(), p1.c_str());
635 } else { 636 } else {
636 // t is: -c/b 637 // t is: -c/b
637 t.printf("-%s / %s", cName.c_str(), bVar.c_str()); 638 t.printf("-%s / %s", cName.c_str(), bVar.c_str());
638 } 639 }
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720 #else 721 #else
721 722
722 bool SkTwoPointRadialGradient::asNewEffect(GrContext* context, const SkPaint& pa int, 723 bool SkTwoPointRadialGradient::asNewEffect(GrContext* context, const SkPaint& pa int,
723 const SkMatrix* localMatrix, GrColor* paintColor, 724 const SkMatrix* localMatrix, GrColor* paintColor,
724 GrEffect** effect) const { 725 GrEffect** effect) const {
725 SkDEBUGFAIL("Should not call in GPU-less build"); 726 SkDEBUGFAIL("Should not call in GPU-less build");
726 return false; 727 return false;
727 } 728 }
728 729
729 #endif 730 #endif
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