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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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