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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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380 | 380 |
381 ///////////////////////////////////////////////////////////////////// | 381 ///////////////////////////////////////////////////////////////////// |
382 | 382 |
383 #if SK_SUPPORT_GPU | 383 #if SK_SUPPORT_GPU |
384 | 384 |
385 #include "GrTBackendEffectFactory.h" | 385 #include "GrTBackendEffectFactory.h" |
386 #include "gl/GrGLShaderBuilder.h" | 386 #include "gl/GrGLShaderBuilder.h" |
387 #include "SkGr.h" | 387 #include "SkGr.h" |
388 | 388 |
389 // For brevity | 389 // For brevity |
390 typedef GrGLUniformManager::UniformHandle UniformHandle; | 390 typedef GrGLProgramDataManager::UniformHandle UniformHandle; |
391 | 391 |
392 class GrGLRadial2Gradient : public GrGLGradientEffect { | 392 class GrGLRadial2Gradient : public GrGLGradientEffect { |
393 | 393 |
394 public: | 394 public: |
395 | 395 |
396 GrGLRadial2Gradient(const GrBackendEffectFactory& factory, const GrDrawEffec
t&); | 396 GrGLRadial2Gradient(const GrBackendEffectFactory& factory, const GrDrawEffec
t&); |
397 virtual ~GrGLRadial2Gradient() { } | 397 virtual ~GrGLRadial2Gradient() { } |
398 | 398 |
399 virtual void emitCode(GrGLShaderBuilder*, | 399 virtual void emitCode(GrGLShaderBuilder*, |
400 const GrDrawEffect&, | 400 const GrDrawEffect&, |
401 const GrEffectKey&, | 401 const GrEffectKey&, |
402 const char* outputColor, | 402 const char* outputColor, |
403 const char* inputColor, | 403 const char* inputColor, |
404 const TransformedCoordsArray&, | 404 const TransformedCoordsArray&, |
405 const TextureSamplerArray&) SK_OVERRIDE; | 405 const TextureSamplerArray&) SK_OVERRIDE; |
406 virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVER
RIDE; | 406 virtual void setData(const GrGLProgramDataManager&, const GrDrawEffect&) SK_
OVERRIDE; |
407 | 407 |
408 static void GenKey(const GrDrawEffect&, const GrGLCaps& caps, GrEffectKeyBui
lder* b); | 408 static void GenKey(const GrDrawEffect&, const GrGLCaps& caps, GrEffectKeyBui
lder* b); |
409 | 409 |
410 protected: | 410 protected: |
411 | 411 |
412 UniformHandle fParamUni; | 412 UniformHandle fParamUni; |
413 | 413 |
414 const char* fVSVaryingName; | 414 const char* fVSVaryingName; |
415 const char* fFSVaryingName; | 415 const char* fFSVaryingName; |
416 | 416 |
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618 t.printf("(-%s + %s * %s) * %s", bVar.c_str(), p5.c_str(), | 618 t.printf("(-%s + %s * %s) * %s", bVar.c_str(), p5.c_str(), |
619 rootName.c_str(), p1.c_str()); | 619 rootName.c_str(), p1.c_str()); |
620 } else { | 620 } else { |
621 // t is: -c/b | 621 // t is: -c/b |
622 t.printf("-%s / %s", cName.c_str(), bVar.c_str()); | 622 t.printf("-%s / %s", cName.c_str(), bVar.c_str()); |
623 } | 623 } |
624 | 624 |
625 this->emitColor(builder, t.c_str(), baseKey, outputColor, inputColor, sample
rs); | 625 this->emitColor(builder, t.c_str(), baseKey, outputColor, inputColor, sample
rs); |
626 } | 626 } |
627 | 627 |
628 void GrGLRadial2Gradient::setData(const GrGLUniformManager& uman, | 628 void GrGLRadial2Gradient::setData(const GrGLProgramDataManager& pdman, |
629 const GrDrawEffect& drawEffect) { | 629 const GrDrawEffect& drawEffect) { |
630 INHERITED::setData(uman, drawEffect); | 630 INHERITED::setData(pdman, drawEffect); |
631 const GrRadial2Gradient& data = drawEffect.castEffect<GrRadial2Gradient>(); | 631 const GrRadial2Gradient& data = drawEffect.castEffect<GrRadial2Gradient>(); |
632 SkASSERT(data.isDegenerate() == fIsDegenerate); | 632 SkASSERT(data.isDegenerate() == fIsDegenerate); |
633 SkScalar centerX1 = data.center(); | 633 SkScalar centerX1 = data.center(); |
634 SkScalar radius0 = data.radius(); | 634 SkScalar radius0 = data.radius(); |
635 if (fCachedCenter != centerX1 || | 635 if (fCachedCenter != centerX1 || |
636 fCachedRadius != radius0 || | 636 fCachedRadius != radius0 || |
637 fCachedPosRoot != data.isPosRoot()) { | 637 fCachedPosRoot != data.isPosRoot()) { |
638 | 638 |
639 SkScalar a = SkScalarMul(centerX1, centerX1) - SK_Scalar1; | 639 SkScalar a = SkScalarMul(centerX1, centerX1) - SK_Scalar1; |
640 | 640 |
641 // When we're in the degenerate (linear) case, the second | 641 // When we're in the degenerate (linear) case, the second |
642 // value will be INF but the program doesn't read it. (We | 642 // value will be INF but the program doesn't read it. (We |
643 // use the same 6 uniforms even though we don't need them | 643 // use the same 6 uniforms even though we don't need them |
644 // all in the linear case just to keep the code complexity | 644 // all in the linear case just to keep the code complexity |
645 // down). | 645 // down). |
646 float values[6] = { | 646 float values[6] = { |
647 SkScalarToFloat(a), | 647 SkScalarToFloat(a), |
648 1 / (2.f * SkScalarToFloat(a)), | 648 1 / (2.f * SkScalarToFloat(a)), |
649 SkScalarToFloat(centerX1), | 649 SkScalarToFloat(centerX1), |
650 SkScalarToFloat(radius0), | 650 SkScalarToFloat(radius0), |
651 SkScalarToFloat(SkScalarMul(radius0, radius0)), | 651 SkScalarToFloat(SkScalarMul(radius0, radius0)), |
652 data.isPosRoot() ? 1.f : -1.f | 652 data.isPosRoot() ? 1.f : -1.f |
653 }; | 653 }; |
654 | 654 |
655 uman.set1fv(fParamUni, 6, values); | 655 pdman.set1fv(fParamUni, 6, values); |
656 fCachedCenter = centerX1; | 656 fCachedCenter = centerX1; |
657 fCachedRadius = radius0; | 657 fCachedRadius = radius0; |
658 fCachedPosRoot = data.isPosRoot(); | 658 fCachedPosRoot = data.isPosRoot(); |
659 } | 659 } |
660 } | 660 } |
661 | 661 |
662 void GrGLRadial2Gradient::GenKey(const GrDrawEffect& drawEffect, | 662 void GrGLRadial2Gradient::GenKey(const GrDrawEffect& drawEffect, |
663 const GrGLCaps&, GrEffectKeyBuilder* b) { | 663 const GrGLCaps&, GrEffectKeyBuilder* b) { |
664 uint32_t* key = b->add32n(2); | 664 uint32_t* key = b->add32n(2); |
665 key[0] = GenBaseGradientKey(drawEffect); | 665 key[0] = GenBaseGradientKey(drawEffect); |
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705 #else | 705 #else |
706 | 706 |
707 bool SkTwoPointRadialGradient::asNewEffect(GrContext* context, const SkPaint& pa
int, | 707 bool SkTwoPointRadialGradient::asNewEffect(GrContext* context, const SkPaint& pa
int, |
708 const SkMatrix* localMatrix, GrColor*
paintColor, | 708 const SkMatrix* localMatrix, GrColor*
paintColor, |
709 GrEffect** effect) const { | 709 GrEffect** effect) const { |
710 SkDEBUGFAIL("Should not call in GPU-less build"); | 710 SkDEBUGFAIL("Should not call in GPU-less build"); |
711 return false; | 711 return false; |
712 } | 712 } |
713 | 713 |
714 #endif | 714 #endif |
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