| /* |
| * Copyright 2012 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkLightingImageFilter.h" |
| #include "SkBitmap.h" |
| #include "SkColorPriv.h" |
| #include "SkFlattenableBuffers.h" |
| #include "SkOrderedReadBuffer.h" |
| #include "SkOrderedWriteBuffer.h" |
| #include "SkTypes.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "effects/GrSingleTextureEffect.h" |
| #include "gl/GrGLEffect.h" |
| #include "GrEffect.h" |
| #include "GrTBackendEffectFactory.h" |
| |
| class GrGLDiffuseLightingEffect; |
| class GrGLSpecularLightingEffect; |
| |
| // For brevity |
| typedef GrGLUniformManager::UniformHandle UniformHandle; |
| #endif |
| |
| namespace { |
| |
| const SkScalar gOneThird = SkScalarInvert(SkIntToScalar(3)); |
| const SkScalar gTwoThirds = SkScalarDiv(SkIntToScalar(2), SkIntToScalar(3)); |
| const SkScalar gOneHalf = SkFloatToScalar(0.5f); |
| const SkScalar gOneQuarter = SkFloatToScalar(0.25f); |
| |
| #if SK_SUPPORT_GPU |
| void setUniformPoint3(const GrGLUniformManager& uman, UniformHandle uni, const SkPoint3& point) { |
| GR_STATIC_ASSERT(sizeof(SkPoint3) == 3 * sizeof(GrGLfloat)); |
| uman.set3fv(uni, 0, 1, &point.fX); |
| } |
| |
| void setUniformNormal3(const GrGLUniformManager& uman, UniformHandle uni, const SkPoint3& point) { |
| setUniformPoint3(uman, uni, SkPoint3(point.fX, point.fY, point.fZ)); |
| } |
| #endif |
| |
| // Shift matrix components to the left, as we advance pixels to the right. |
| inline void shiftMatrixLeft(int m[9]) { |
| m[0] = m[1]; |
| m[3] = m[4]; |
| m[6] = m[7]; |
| m[1] = m[2]; |
| m[4] = m[5]; |
| m[7] = m[8]; |
| } |
| |
| class DiffuseLightingType { |
| public: |
| DiffuseLightingType(SkScalar kd) |
| : fKD(kd) {} |
| SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, const SkPoint3& lightColor) const { |
| SkScalar colorScale = SkScalarMul(fKD, normal.dot(surfaceTolight)); |
| colorScale = SkScalarClampMax(colorScale, SK_Scalar1); |
| SkPoint3 color(lightColor * colorScale); |
| return SkPackARGB32(255, |
| SkClampMax(SkScalarFloorToInt(color.fX), 255), |
| SkClampMax(SkScalarFloorToInt(color.fY), 255), |
| SkClampMax(SkScalarFloorToInt(color.fZ), 255)); |
| } |
| private: |
| SkScalar fKD; |
| }; |
| |
| class SpecularLightingType { |
| public: |
| SpecularLightingType(SkScalar ks, SkScalar shininess) |
| : fKS(ks), fShininess(shininess) {} |
| SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, const SkPoint3& lightColor) const { |
| SkPoint3 halfDir(surfaceTolight); |
| halfDir.fZ += SK_Scalar1; // eye position is always (0, 0, 1) |
| halfDir.normalize(); |
| SkScalar colorScale = SkScalarMul(fKS, |
| SkScalarPow(normal.dot(halfDir), fShininess)); |
| colorScale = SkScalarClampMax(colorScale, SK_Scalar1); |
| SkPoint3 color(lightColor * colorScale); |
| return SkPackARGB32(SkClampMax(SkScalarFloorToInt(color.maxComponent()), 255), |
| SkClampMax(SkScalarFloorToInt(color.fX), 255), |
| SkClampMax(SkScalarFloorToInt(color.fY), 255), |
| SkClampMax(SkScalarFloorToInt(color.fZ), 255)); |
| } |
| private: |
| SkScalar fKS; |
| SkScalar fShininess; |
| }; |
| |
| inline SkScalar sobel(int a, int b, int c, int d, int e, int f, SkScalar scale) { |
| return SkScalarMul(SkIntToScalar(-a + b - 2 * c + 2 * d -e + f), scale); |
| } |
| |
| inline SkPoint3 pointToNormal(SkScalar x, SkScalar y, SkScalar surfaceScale) { |
| SkPoint3 vector(SkScalarMul(-x, surfaceScale), |
| SkScalarMul(-y, surfaceScale), |
| SK_Scalar1); |
| vector.normalize(); |
| return vector; |
| } |
| |
| inline SkPoint3 topLeftNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(0, 0, m[4], m[5], m[7], m[8], gTwoThirds), |
| sobel(0, 0, m[4], m[7], m[5], m[8], gTwoThirds), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 topNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel( 0, 0, m[3], m[5], m[6], m[8], gOneThird), |
| sobel(m[3], m[6], m[4], m[7], m[5], m[8], gOneHalf), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 topRightNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel( 0, 0, m[3], m[4], m[6], m[7], gTwoThirds), |
| sobel(m[3], m[6], m[4], m[7], 0, 0, gTwoThirds), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 leftNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(m[1], m[2], m[4], m[5], m[7], m[8], gOneHalf), |
| sobel( 0, 0, m[1], m[7], m[2], m[8], gOneThird), |
| surfaceScale); |
| } |
| |
| |
| inline SkPoint3 interiorNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(m[0], m[2], m[3], m[5], m[6], m[8], gOneQuarter), |
| sobel(m[0], m[6], m[1], m[7], m[2], m[8], gOneQuarter), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 rightNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(m[0], m[1], m[3], m[4], m[6], m[7], gOneHalf), |
| sobel(m[0], m[6], m[1], m[7], 0, 0, gOneThird), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 bottomLeftNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(m[1], m[2], m[4], m[5], 0, 0, gTwoThirds), |
| sobel( 0, 0, m[1], m[4], m[2], m[5], gTwoThirds), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 bottomNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(m[0], m[2], m[3], m[5], 0, 0, gOneThird), |
| sobel(m[0], m[3], m[1], m[4], m[2], m[5], gOneHalf), |
| surfaceScale); |
| } |
| |
| inline SkPoint3 bottomRightNormal(int m[9], SkScalar surfaceScale) { |
| return pointToNormal(sobel(m[0], m[1], m[3], m[4], 0, 0, gTwoThirds), |
| sobel(m[0], m[3], m[1], m[4], 0, 0, gTwoThirds), |
| surfaceScale); |
| } |
| |
| template <class LightingType, class LightType> void lightBitmap(const LightingType& lightingType, const SkLight* light, const SkBitmap& src, SkBitmap* dst, SkScalar surfaceScale, const SkIRect& bounds) { |
| SkASSERT(dst->width() == bounds.width() && dst->height() == bounds.height()); |
| const LightType* l = static_cast<const LightType*>(light); |
| int left = bounds.left(), right = bounds.right(); |
| int bottom = bounds.bottom(); |
| int y = bounds.top(); |
| SkPMColor* dptr = dst->getAddr32(0, 0); |
| { |
| int x = left; |
| const SkPMColor* row1 = src.getAddr32(x, y); |
| const SkPMColor* row2 = src.getAddr32(x, y + 1); |
| int m[9]; |
| m[4] = SkGetPackedA32(*row1++); |
| m[5] = SkGetPackedA32(*row1++); |
| m[7] = SkGetPackedA32(*row2++); |
| m[8] = SkGetPackedA32(*row2++); |
| SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(topLeftNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| for (++x; x < right - 1; ++x) |
| { |
| shiftMatrixLeft(m); |
| m[5] = SkGetPackedA32(*row1++); |
| m[8] = SkGetPackedA32(*row2++); |
| surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(topNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| } |
| shiftMatrixLeft(m); |
| surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(topRightNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| } |
| |
| for (++y; y < bottom - 1; ++y) { |
| int x = left; |
| const SkPMColor* row0 = src.getAddr32(x, y - 1); |
| const SkPMColor* row1 = src.getAddr32(x, y); |
| const SkPMColor* row2 = src.getAddr32(x, y + 1); |
| int m[9]; |
| m[1] = SkGetPackedA32(*row0++); |
| m[2] = SkGetPackedA32(*row0++); |
| m[4] = SkGetPackedA32(*row1++); |
| m[5] = SkGetPackedA32(*row1++); |
| m[7] = SkGetPackedA32(*row2++); |
| m[8] = SkGetPackedA32(*row2++); |
| SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(leftNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| for (++x; x < right - 1; ++x) { |
| shiftMatrixLeft(m); |
| m[2] = SkGetPackedA32(*row0++); |
| m[5] = SkGetPackedA32(*row1++); |
| m[8] = SkGetPackedA32(*row2++); |
| surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(interiorNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| } |
| shiftMatrixLeft(m); |
| surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(rightNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| } |
| |
| { |
| int x = left; |
| const SkPMColor* row0 = src.getAddr32(x, bottom - 2); |
| const SkPMColor* row1 = src.getAddr32(x, bottom - 1); |
| int m[9]; |
| m[1] = SkGetPackedA32(*row0++); |
| m[2] = SkGetPackedA32(*row0++); |
| m[4] = SkGetPackedA32(*row1++); |
| m[5] = SkGetPackedA32(*row1++); |
| SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(bottomLeftNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| for (++x; x < right - 1; ++x) |
| { |
| shiftMatrixLeft(m); |
| m[2] = SkGetPackedA32(*row0++); |
| m[5] = SkGetPackedA32(*row1++); |
| surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(bottomNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| } |
| shiftMatrixLeft(m); |
| surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); |
| *dptr++ = lightingType.light(bottomRightNormal(m, surfaceScale), surfaceToLight, l->lightColor(surfaceToLight)); |
| } |
| } |
| |
| SkPoint3 readPoint3(SkFlattenableReadBuffer& buffer) { |
| SkPoint3 point; |
| point.fX = buffer.readScalar(); |
| point.fY = buffer.readScalar(); |
| point.fZ = buffer.readScalar(); |
| buffer.validate(SkScalarIsFinite(point.fX) && |
| SkScalarIsFinite(point.fY) && |
| SkScalarIsFinite(point.fZ)); |
| return point; |
| }; |
| |
| void writePoint3(const SkPoint3& point, SkFlattenableWriteBuffer& buffer) { |
| buffer.writeScalar(point.fX); |
| buffer.writeScalar(point.fY); |
| buffer.writeScalar(point.fZ); |
| }; |
| |
| class SkDiffuseLightingImageFilter : public SkLightingImageFilter { |
| public: |
| SkDiffuseLightingImageFilter(SkLight* light, SkScalar surfaceScale, |
| SkScalar kd, SkImageFilter* input, const CropRect* cropRect); |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiffuseLightingImageFilter) |
| SkScalar kd() const { return fKD; } |
| |
| protected: |
| explicit SkDiffuseLightingImageFilter(SkFlattenableReadBuffer& buffer); |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE; |
| virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&, |
| SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; |
| #if SK_SUPPORT_GPU |
| virtual bool asNewEffect(GrEffectRef** effect, GrTexture*, const SkMatrix& matrix, const SkIRect& bounds) const SK_OVERRIDE; |
| #endif |
| |
| private: |
| typedef SkLightingImageFilter INHERITED; |
| SkScalar fKD; |
| }; |
| |
| class SkSpecularLightingImageFilter : public SkLightingImageFilter { |
| public: |
| SkSpecularLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess, SkImageFilter* input, const CropRect* cropRect); |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSpecularLightingImageFilter) |
| |
| SkScalar ks() const { return fKS; } |
| SkScalar shininess() const { return fShininess; } |
| |
| protected: |
| explicit SkSpecularLightingImageFilter(SkFlattenableReadBuffer& buffer); |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE; |
| virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&, |
| SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; |
| #if SK_SUPPORT_GPU |
| virtual bool asNewEffect(GrEffectRef** effect, GrTexture*, const SkMatrix& matrix, const SkIRect& bounds) const SK_OVERRIDE; |
| #endif |
| |
| private: |
| typedef SkLightingImageFilter INHERITED; |
| SkScalar fKS; |
| SkScalar fShininess; |
| }; |
| |
| #if SK_SUPPORT_GPU |
| |
| class GrLightingEffect : public GrSingleTextureEffect { |
| public: |
| GrLightingEffect(GrTexture* texture, const SkLight* light, SkScalar surfaceScale, const SkMatrix& matrix); |
| virtual ~GrLightingEffect(); |
| |
| const SkLight* light() const { return fLight; } |
| SkScalar surfaceScale() const { return fSurfaceScale; } |
| const SkMatrix& filterMatrix() const { return fFilterMatrix; } |
| |
| virtual void getConstantColorComponents(GrColor* color, |
| uint32_t* validFlags) const SK_OVERRIDE { |
| // lighting shaders are complicated. We just throw up our hands. |
| *validFlags = 0; |
| } |
| |
| protected: |
| virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
| |
| private: |
| typedef GrSingleTextureEffect INHERITED; |
| const SkLight* fLight; |
| SkScalar fSurfaceScale; |
| SkMatrix fFilterMatrix; |
| }; |
| |
| class GrDiffuseLightingEffect : public GrLightingEffect { |
| public: |
| static GrEffectRef* Create(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix, |
| SkScalar kd) { |
| AutoEffectUnref effect(SkNEW_ARGS(GrDiffuseLightingEffect, (texture, |
| light, |
| surfaceScale, |
| matrix, |
| kd))); |
| return CreateEffectRef(effect); |
| } |
| |
| static const char* Name() { return "DiffuseLighting"; } |
| |
| typedef GrGLDiffuseLightingEffect GLEffect; |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| SkScalar kd() const { return fKD; } |
| |
| private: |
| virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
| |
| GrDiffuseLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix, |
| SkScalar kd); |
| |
| GR_DECLARE_EFFECT_TEST; |
| typedef GrLightingEffect INHERITED; |
| SkScalar fKD; |
| }; |
| |
| class GrSpecularLightingEffect : public GrLightingEffect { |
| public: |
| static GrEffectRef* Create(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix, |
| SkScalar ks, |
| SkScalar shininess) { |
| AutoEffectUnref effect(SkNEW_ARGS(GrSpecularLightingEffect, (texture, |
| light, |
| surfaceScale, |
| matrix, |
| ks, |
| shininess))); |
| return CreateEffectRef(effect); |
| } |
| static const char* Name() { return "SpecularLighting"; } |
| |
| typedef GrGLSpecularLightingEffect GLEffect; |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| SkScalar ks() const { return fKS; } |
| SkScalar shininess() const { return fShininess; } |
| |
| private: |
| virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
| |
| GrSpecularLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix, |
| SkScalar ks, |
| SkScalar shininess); |
| |
| GR_DECLARE_EFFECT_TEST; |
| typedef GrLightingEffect INHERITED; |
| SkScalar fKS; |
| SkScalar fShininess; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLLight { |
| public: |
| virtual ~GrGLLight() {} |
| |
| /** |
| * This is called by GrGLLightingEffect::emitCode() before either of the two virtual functions |
| * below. It adds a vec3f uniform visible in the FS that represents the constant light color. |
| */ |
| void emitLightColorUniform(GrGLShaderBuilder*); |
| |
| /** |
| * These two functions are called from GrGLLightingEffect's emitCode() function. |
| * emitSurfaceToLight places an expression in param out that is the vector from the surface to |
| * the light. The expression will be used in the FS. emitLightColor writes an expression into |
| * the FS that is the color of the light. Either function may add functions and/or uniforms to |
| * the FS. The default of emitLightColor appends the name of the constant light color uniform |
| * and so this function only needs to be overridden if the light color varies spatially. |
| */ |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, const char* z) = 0; |
| virtual void emitLightColor(GrGLShaderBuilder*, const char *surfaceToLight); |
| |
| // This is called from GrGLLightingEffect's setData(). Subclasses of GrGLLight must call |
| // INHERITED::setData(). |
| virtual void setData(const GrGLUniformManager&, |
| const SkLight* light) const; |
| |
| protected: |
| /** |
| * Gets the constant light color uniform. Subclasses can use this in their emitLightColor |
| * function. |
| */ |
| UniformHandle lightColorUni() const { return fColorUni; } |
| |
| private: |
| UniformHandle fColorUni; |
| |
| typedef SkRefCnt INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLDistantLight : public GrGLLight { |
| public: |
| virtual ~GrGLDistantLight() {} |
| virtual void setData(const GrGLUniformManager&, |
| const SkLight* light) const SK_OVERRIDE; |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, const char* z) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLight INHERITED; |
| UniformHandle fDirectionUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLPointLight : public GrGLLight { |
| public: |
| virtual ~GrGLPointLight() {} |
| virtual void setData(const GrGLUniformManager&, |
| const SkLight* light) const SK_OVERRIDE; |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, const char* z) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLight INHERITED; |
| UniformHandle fLocationUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLSpotLight : public GrGLLight { |
| public: |
| virtual ~GrGLSpotLight() {} |
| virtual void setData(const GrGLUniformManager&, |
| const SkLight* light) const SK_OVERRIDE; |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, const char* z) SK_OVERRIDE; |
| virtual void emitLightColor(GrGLShaderBuilder*, const char *surfaceToLight) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLight INHERITED; |
| |
| SkString fLightColorFunc; |
| UniformHandle fLocationUni; |
| UniformHandle fExponentUni; |
| UniformHandle fCosOuterConeAngleUni; |
| UniformHandle fCosInnerConeAngleUni; |
| UniformHandle fConeScaleUni; |
| UniformHandle fSUni; |
| }; |
| #else |
| |
| class GrGLLight; |
| |
| #endif |
| |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkLight : public SkRefCnt { |
| public: |
| SK_DECLARE_INST_COUNT(SkLight) |
| |
| enum LightType { |
| kDistant_LightType, |
| kPoint_LightType, |
| kSpot_LightType, |
| }; |
| virtual LightType type() const = 0; |
| const SkPoint3& color() const { return fColor; } |
| virtual GrGLLight* createGLLight() const = 0; |
| virtual bool isEqual(const SkLight& other) const { |
| return fColor == other.fColor; |
| } |
| // Called to know whether the generated GrGLLight will require access to the fragment position. |
| virtual bool requiresFragmentPosition() const = 0; |
| virtual SkLight* transform(const SkMatrix& matrix) const = 0; |
| |
| // Defined below SkLight's subclasses. |
| void flattenLight(SkFlattenableWriteBuffer& buffer) const; |
| static SkLight* UnflattenLight(SkFlattenableReadBuffer& buffer); |
| |
| protected: |
| SkLight(SkColor color) |
| : fColor(SkIntToScalar(SkColorGetR(color)), |
| SkIntToScalar(SkColorGetG(color)), |
| SkIntToScalar(SkColorGetB(color))) {} |
| SkLight(const SkPoint3& color) |
| : fColor(color) {} |
| SkLight(SkFlattenableReadBuffer& buffer) { |
| fColor = readPoint3(buffer); |
| } |
| |
| virtual void onFlattenLight(SkFlattenableWriteBuffer& buffer) const = 0; |
| |
| |
| private: |
| typedef SkRefCnt INHERITED; |
| SkPoint3 fColor; |
| }; |
| |
| SK_DEFINE_INST_COUNT(SkLight) |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkDistantLight : public SkLight { |
| public: |
| SkDistantLight(const SkPoint3& direction, SkColor color) |
| : INHERITED(color), fDirection(direction) { |
| } |
| |
| SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const { |
| return fDirection; |
| }; |
| SkPoint3 lightColor(const SkPoint3&) const { return color(); } |
| virtual LightType type() const { return kDistant_LightType; } |
| const SkPoint3& direction() const { return fDirection; } |
| virtual GrGLLight* createGLLight() const SK_OVERRIDE { |
| #if SK_SUPPORT_GPU |
| return SkNEW(GrGLDistantLight); |
| #else |
| SkDEBUGFAIL("Should not call in GPU-less build"); |
| return NULL; |
| #endif |
| } |
| virtual bool requiresFragmentPosition() const SK_OVERRIDE { return false; } |
| |
| virtual bool isEqual(const SkLight& other) const SK_OVERRIDE { |
| if (other.type() != kDistant_LightType) { |
| return false; |
| } |
| |
| const SkDistantLight& o = static_cast<const SkDistantLight&>(other); |
| return INHERITED::isEqual(other) && |
| fDirection == o.fDirection; |
| } |
| |
| SkDistantLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| fDirection = readPoint3(buffer); |
| } |
| |
| protected: |
| SkDistantLight(const SkPoint3& direction, const SkPoint3& color) |
| : INHERITED(color), fDirection(direction) { |
| } |
| virtual SkLight* transform(const SkMatrix& matrix) const { |
| return new SkDistantLight(direction(), color()); |
| } |
| virtual void onFlattenLight(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
| writePoint3(fDirection, buffer); |
| } |
| |
| private: |
| typedef SkLight INHERITED; |
| SkPoint3 fDirection; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkPointLight : public SkLight { |
| public: |
| SkPointLight(const SkPoint3& location, SkColor color) |
| : INHERITED(color), fLocation(location) {} |
| |
| SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const { |
| SkPoint3 direction(fLocation.fX - SkIntToScalar(x), |
| fLocation.fY - SkIntToScalar(y), |
| fLocation.fZ - SkScalarMul(SkIntToScalar(z), surfaceScale)); |
| direction.normalize(); |
| return direction; |
| }; |
| SkPoint3 lightColor(const SkPoint3&) const { return color(); } |
| virtual LightType type() const { return kPoint_LightType; } |
| const SkPoint3& location() const { return fLocation; } |
| virtual GrGLLight* createGLLight() const SK_OVERRIDE { |
| #if SK_SUPPORT_GPU |
| return SkNEW(GrGLPointLight); |
| #else |
| SkDEBUGFAIL("Should not call in GPU-less build"); |
| return NULL; |
| #endif |
| } |
| virtual bool requiresFragmentPosition() const SK_OVERRIDE { return true; } |
| virtual bool isEqual(const SkLight& other) const SK_OVERRIDE { |
| if (other.type() != kPoint_LightType) { |
| return false; |
| } |
| const SkPointLight& o = static_cast<const SkPointLight&>(other); |
| return INHERITED::isEqual(other) && |
| fLocation == o.fLocation; |
| } |
| virtual SkLight* transform(const SkMatrix& matrix) const { |
| SkPoint location2 = SkPoint::Make(fLocation.fX, fLocation.fY); |
| matrix.mapPoints(&location2, 1); |
| SkPoint3 location(location2.fX, location2.fY, fLocation.fZ); |
| return new SkPointLight(location, color()); |
| } |
| |
| SkPointLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| fLocation = readPoint3(buffer); |
| } |
| |
| protected: |
| SkPointLight(const SkPoint3& location, const SkPoint3& color) |
| : INHERITED(color), fLocation(location) {} |
| virtual void onFlattenLight(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
| writePoint3(fLocation, buffer); |
| } |
| |
| private: |
| typedef SkLight INHERITED; |
| SkPoint3 fLocation; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkSpotLight : public SkLight { |
| public: |
| SkSpotLight(const SkPoint3& location, const SkPoint3& target, SkScalar specularExponent, SkScalar cutoffAngle, SkColor color) |
| : INHERITED(color), |
| fLocation(location), |
| fTarget(target), |
| fSpecularExponent(SkScalarPin(specularExponent, kSpecularExponentMin, kSpecularExponentMax)) |
| { |
| fS = target - location; |
| fS.normalize(); |
| fCosOuterConeAngle = SkScalarCos(SkDegreesToRadians(cutoffAngle)); |
| const SkScalar antiAliasThreshold = SkFloatToScalar(0.016f); |
| fCosInnerConeAngle = fCosOuterConeAngle + antiAliasThreshold; |
| fConeScale = SkScalarInvert(antiAliasThreshold); |
| } |
| |
| virtual SkLight* transform(const SkMatrix& matrix) const { |
| SkPoint location2 = SkPoint::Make(fLocation.fX, fLocation.fY); |
| matrix.mapPoints(&location2, 1); |
| SkPoint3 location(location2.fX, location2.fY, fLocation.fZ); |
| SkPoint target2 = SkPoint::Make(fTarget.fX, fTarget.fY); |
| matrix.mapPoints(&target2, 1); |
| SkPoint3 target(target2.fX, target2.fY, fTarget.fZ); |
| return new SkSpotLight(location, target, fSpecularExponent, fCosOuterConeAngle, fCosInnerConeAngle, fConeScale, fS, color()); |
| } |
| |
| SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const { |
| SkPoint3 direction(fLocation.fX - SkIntToScalar(x), |
| fLocation.fY - SkIntToScalar(y), |
| fLocation.fZ - SkScalarMul(SkIntToScalar(z), surfaceScale)); |
| direction.normalize(); |
| return direction; |
| }; |
| SkPoint3 lightColor(const SkPoint3& surfaceToLight) const { |
| SkScalar cosAngle = -surfaceToLight.dot(fS); |
| if (cosAngle < fCosOuterConeAngle) { |
| return SkPoint3(0, 0, 0); |
| } |
| SkScalar scale = SkScalarPow(cosAngle, fSpecularExponent); |
| if (cosAngle < fCosInnerConeAngle) { |
| scale = SkScalarMul(scale, cosAngle - fCosOuterConeAngle); |
| return color() * SkScalarMul(scale, fConeScale); |
| } |
| return color() * scale; |
| } |
| virtual GrGLLight* createGLLight() const SK_OVERRIDE { |
| #if SK_SUPPORT_GPU |
| return SkNEW(GrGLSpotLight); |
| #else |
| SkDEBUGFAIL("Should not call in GPU-less build"); |
| return NULL; |
| #endif |
| } |
| virtual bool requiresFragmentPosition() const SK_OVERRIDE { return true; } |
| virtual LightType type() const { return kSpot_LightType; } |
| const SkPoint3& location() const { return fLocation; } |
| const SkPoint3& target() const { return fTarget; } |
| SkScalar specularExponent() const { return fSpecularExponent; } |
| SkScalar cosInnerConeAngle() const { return fCosInnerConeAngle; } |
| SkScalar cosOuterConeAngle() const { return fCosOuterConeAngle; } |
| SkScalar coneScale() const { return fConeScale; } |
| const SkPoint3& s() const { return fS; } |
| |
| SkSpotLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| fLocation = readPoint3(buffer); |
| fTarget = readPoint3(buffer); |
| fSpecularExponent = buffer.readScalar(); |
| fCosOuterConeAngle = buffer.readScalar(); |
| fCosInnerConeAngle = buffer.readScalar(); |
| fConeScale = buffer.readScalar(); |
| fS = readPoint3(buffer); |
| buffer.validate(SkScalarIsFinite(fSpecularExponent) && |
| SkScalarIsFinite(fCosOuterConeAngle) && |
| SkScalarIsFinite(fCosInnerConeAngle) && |
| SkScalarIsFinite(fConeScale)); |
| } |
| protected: |
| SkSpotLight(const SkPoint3& location, const SkPoint3& target, SkScalar specularExponent, SkScalar cosOuterConeAngle, SkScalar cosInnerConeAngle, SkScalar coneScale, const SkPoint3& s, const SkPoint3& color) |
| : INHERITED(color), |
| fLocation(location), |
| fTarget(target), |
| fSpecularExponent(specularExponent), |
| fCosOuterConeAngle(cosOuterConeAngle), |
| fCosInnerConeAngle(cosInnerConeAngle), |
| fConeScale(coneScale), |
| fS(s) |
| { |
| } |
| virtual void onFlattenLight(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
| writePoint3(fLocation, buffer); |
| writePoint3(fTarget, buffer); |
| buffer.writeScalar(fSpecularExponent); |
| buffer.writeScalar(fCosOuterConeAngle); |
| buffer.writeScalar(fCosInnerConeAngle); |
| buffer.writeScalar(fConeScale); |
| writePoint3(fS, buffer); |
| } |
| |
| virtual bool isEqual(const SkLight& other) const SK_OVERRIDE { |
| if (other.type() != kSpot_LightType) { |
| return false; |
| } |
| |
| const SkSpotLight& o = static_cast<const SkSpotLight&>(other); |
| return INHERITED::isEqual(other) && |
| fLocation == o.fLocation && |
| fTarget == o.fTarget && |
| fSpecularExponent == o.fSpecularExponent && |
| fCosOuterConeAngle == o.fCosOuterConeAngle; |
| } |
| |
| private: |
| static const SkScalar kSpecularExponentMin; |
| static const SkScalar kSpecularExponentMax; |
| |
| typedef SkLight INHERITED; |
| SkPoint3 fLocation; |
| SkPoint3 fTarget; |
| SkScalar fSpecularExponent; |
| SkScalar fCosOuterConeAngle; |
| SkScalar fCosInnerConeAngle; |
| SkScalar fConeScale; |
| SkPoint3 fS; |
| }; |
| |
| // According to the spec, the specular term should be in the range [1, 128] : |
| // http://www.w3.org/TR/SVG/filters.html#feSpecularLightingSpecularExponentAttribute |
| const SkScalar SkSpotLight::kSpecularExponentMin = SkFloatToScalar(1.0f); |
| const SkScalar SkSpotLight::kSpecularExponentMax = SkFloatToScalar(128.0f); |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkLight::flattenLight(SkFlattenableWriteBuffer& buffer) const { |
| // Write type first, then baseclass, then subclass. |
| buffer.writeInt(this->type()); |
| writePoint3(fColor, buffer); |
| this->onFlattenLight(buffer); |
| } |
| |
| /*static*/ SkLight* SkLight::UnflattenLight(SkFlattenableReadBuffer& buffer) { |
| // Read type first. |
| const SkLight::LightType type = (SkLight::LightType)buffer.readInt(); |
| switch (type) { |
| // Each of these constructors must first call SkLight's, so we'll read the baseclass |
| // then subclass, same order as flattenLight. |
| case SkLight::kDistant_LightType: return SkNEW_ARGS(SkDistantLight, (buffer)); |
| case SkLight::kPoint_LightType: return SkNEW_ARGS(SkPointLight, (buffer)); |
| case SkLight::kSpot_LightType: return SkNEW_ARGS(SkSpotLight, (buffer)); |
| default: |
| SkDEBUGFAIL("Unknown LightType."); |
| return NULL; |
| } |
| } |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkLightingImageFilter::SkLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkImageFilter* input, const CropRect* cropRect) |
| : INHERITED(input, cropRect), |
| fLight(light), |
| fSurfaceScale(SkScalarDiv(surfaceScale, SkIntToScalar(255))) |
| { |
| SkASSERT(fLight); |
| // our caller knows that we take ownership of the light, so we don't |
| // need to call ref() here. |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateDistantLitDiffuse( |
| const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar kd, SkImageFilter* input, const CropRect* cropRect) { |
| return SkNEW_ARGS(SkDiffuseLightingImageFilter, |
| (SkNEW_ARGS(SkDistantLight, (direction, lightColor)), surfaceScale, kd, |
| input, cropRect)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreatePointLitDiffuse( |
| const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar kd, SkImageFilter* input, const CropRect* cropRect) { |
| return SkNEW_ARGS(SkDiffuseLightingImageFilter, |
| (SkNEW_ARGS(SkPointLight, (location, lightColor)), surfaceScale, kd, |
| input, cropRect)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateSpotLitDiffuse( |
| const SkPoint3& location, const SkPoint3& target, |
| SkScalar specularExponent, SkScalar cutoffAngle, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar kd, |
| SkImageFilter* input, const CropRect* cropRect) { |
| return SkNEW_ARGS(SkDiffuseLightingImageFilter, |
| (SkNEW_ARGS(SkSpotLight, (location, target, specularExponent, |
| cutoffAngle, lightColor)), |
| surfaceScale, kd, input, cropRect)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateDistantLitSpecular( |
| const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar ks, SkScalar shininess, SkImageFilter* input, const CropRect* cropRect) { |
| return SkNEW_ARGS(SkSpecularLightingImageFilter, |
| (SkNEW_ARGS(SkDistantLight, (direction, lightColor)), |
| surfaceScale, ks, shininess, input, cropRect)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreatePointLitSpecular( |
| const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar ks, SkScalar shininess, SkImageFilter* input, const CropRect* cropRect) { |
| return SkNEW_ARGS(SkSpecularLightingImageFilter, |
| (SkNEW_ARGS(SkPointLight, (location, lightColor)), |
| surfaceScale, ks, shininess, input, cropRect)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateSpotLitSpecular( |
| const SkPoint3& location, const SkPoint3& target, |
| SkScalar specularExponent, SkScalar cutoffAngle, |
| SkColor lightColor, SkScalar surfaceScale, |
| SkScalar ks, SkScalar shininess, SkImageFilter* input, const CropRect* cropRect) { |
| return SkNEW_ARGS(SkSpecularLightingImageFilter, |
| (SkNEW_ARGS(SkSpotLight, (location, target, specularExponent, cutoffAngle, lightColor)), |
| surfaceScale, ks, shininess, input, cropRect)); |
| } |
| |
| SkLightingImageFilter::~SkLightingImageFilter() { |
| SkSafeUnref(fLight); |
| } |
| |
| SkLightingImageFilter::SkLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) { |
| fLight = SkLight::UnflattenLight(buffer); |
| fSurfaceScale = buffer.readScalar(); |
| buffer.validate(SkScalarIsFinite(fSurfaceScale)); |
| } |
| |
| void SkLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| fLight->flattenLight(buffer); |
| buffer.writeScalar(fSurfaceScale); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar kd, SkImageFilter* input, const CropRect* cropRect = NULL) |
| : SkLightingImageFilter(light, surfaceScale, input, cropRect), |
| fKD(kd) |
| { |
| } |
| |
| SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) |
| { |
| fKD = buffer.readScalar(); |
| buffer.validate(SkScalarIsFinite(fKD)); |
| } |
| |
| void SkDiffuseLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeScalar(fKD); |
| } |
| |
| bool SkDiffuseLightingImageFilter::onFilterImage(Proxy* proxy, |
| const SkBitmap& source, |
| const SkMatrix& ctm, |
| SkBitmap* dst, |
| SkIPoint* offset) { |
| SkImageFilter* input = getInput(0); |
| SkBitmap src = source; |
| if (input && !input->filterImage(proxy, source, ctm, &src, offset)) { |
| return false; |
| } |
| |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| |
| SkIRect bounds; |
| src.getBounds(&bounds); |
| if (!this->applyCropRect(&bounds, ctm)) { |
| return false; |
| } |
| |
| if (bounds.width() < 2 || bounds.height() < 2) { |
| return false; |
| } |
| |
| dst->setConfig(src.config(), bounds.width(), bounds.height()); |
| dst->allocPixels(); |
| |
| SkAutoTUnref<SkLight> transformedLight(light()->transform(ctm)); |
| |
| DiffuseLightingType lightingType(fKD); |
| switch (transformedLight->type()) { |
| case SkLight::kDistant_LightType: |
| lightBitmap<DiffuseLightingType, SkDistantLight>(lightingType, transformedLight, src, dst, surfaceScale(), bounds); |
| break; |
| case SkLight::kPoint_LightType: |
| lightBitmap<DiffuseLightingType, SkPointLight>(lightingType, transformedLight, src, dst, surfaceScale(), bounds); |
| break; |
| case SkLight::kSpot_LightType: |
| lightBitmap<DiffuseLightingType, SkSpotLight>(lightingType, transformedLight, src, dst, surfaceScale(), bounds); |
| break; |
| } |
| |
| offset->fX += bounds.left(); |
| offset->fY += bounds.top(); |
| return true; |
| } |
| |
| #if SK_SUPPORT_GPU |
| bool SkDiffuseLightingImageFilter::asNewEffect(GrEffectRef** effect, GrTexture* texture, const SkMatrix& matrix, const SkIRect&) const { |
| if (effect) { |
| SkScalar scale = SkScalarMul(surfaceScale(), SkIntToScalar(255)); |
| *effect = GrDiffuseLightingEffect::Create(texture, light(), scale, matrix, kd()); |
| } |
| return true; |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess, SkImageFilter* input, const CropRect* cropRect) |
| : SkLightingImageFilter(light, surfaceScale, input, cropRect), |
| fKS(ks), |
| fShininess(shininess) |
| { |
| } |
| |
| SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) |
| { |
| fKS = buffer.readScalar(); |
| fShininess = buffer.readScalar(); |
| buffer.validate(SkScalarIsFinite(fKS) && |
| SkScalarIsFinite(fShininess)); |
| } |
| |
| void SkSpecularLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeScalar(fKS); |
| buffer.writeScalar(fShininess); |
| } |
| |
| bool SkSpecularLightingImageFilter::onFilterImage(Proxy* proxy, |
| const SkBitmap& source, |
| const SkMatrix& ctm, |
| SkBitmap* dst, |
| SkIPoint* offset) { |
| SkImageFilter* input = getInput(0); |
| SkBitmap src = source; |
| if (input && !input->filterImage(proxy, source, ctm, &src, offset)) { |
| return false; |
| } |
| |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| |
| SkIRect bounds; |
| src.getBounds(&bounds); |
| if (!this->applyCropRect(&bounds, ctm)) { |
| return false; |
| } |
| |
| if (bounds.width() < 2 || bounds.height() < 2) { |
| return false; |
| } |
| |
| dst->setConfig(src.config(), bounds.width(), bounds.height()); |
| dst->allocPixels(); |
| |
| SpecularLightingType lightingType(fKS, fShininess); |
| SkAutoTUnref<SkLight> transformedLight(light()->transform(ctm)); |
| switch (transformedLight->type()) { |
| case SkLight::kDistant_LightType: |
| lightBitmap<SpecularLightingType, SkDistantLight>(lightingType, transformedLight, src, dst, surfaceScale(), bounds); |
| break; |
| case SkLight::kPoint_LightType: |
| lightBitmap<SpecularLightingType, SkPointLight>(lightingType, transformedLight, src, dst, surfaceScale(), bounds); |
| break; |
| case SkLight::kSpot_LightType: |
| lightBitmap<SpecularLightingType, SkSpotLight>(lightingType, transformedLight, src, dst, surfaceScale(), bounds); |
| break; |
| } |
| offset->fX += bounds.left(); |
| offset->fY += bounds.top(); |
| return true; |
| } |
| |
| #if SK_SUPPORT_GPU |
| bool SkSpecularLightingImageFilter::asNewEffect(GrEffectRef** effect, GrTexture* texture, const SkMatrix& matrix, const SkIRect&) const { |
| if (effect) { |
| SkScalar scale = SkScalarMul(surfaceScale(), SkIntToScalar(255)); |
| *effect = GrSpecularLightingEffect::Create(texture, light(), scale, matrix, ks(), shininess()); |
| } |
| return true; |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| |
| namespace { |
| SkPoint3 random_point3(SkRandom* random) { |
| return SkPoint3(SkScalarToFloat(random->nextSScalar1()), |
| SkScalarToFloat(random->nextSScalar1()), |
| SkScalarToFloat(random->nextSScalar1())); |
| } |
| |
| SkLight* create_random_light(SkRandom* random) { |
| int type = random->nextULessThan(3); |
| switch (type) { |
| case 0: { |
| return SkNEW_ARGS(SkDistantLight, (random_point3(random), random->nextU())); |
| } |
| case 1: { |
| return SkNEW_ARGS(SkPointLight, (random_point3(random), random->nextU())); |
| } |
| case 2: { |
| return SkNEW_ARGS(SkSpotLight, (random_point3(random), |
| random_point3(random), |
| random->nextUScalar1(), |
| random->nextUScalar1(), |
| random->nextU())); |
| } |
| default: |
| GrCrash(); |
| return NULL; |
| } |
| } |
| |
| } |
| |
| class GrGLLightingEffect : public GrGLEffect { |
| public: |
| GrGLLightingEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& effect); |
| virtual ~GrGLLightingEffect(); |
| |
| virtual void emitCode(GrGLShaderBuilder*, |
| const GrDrawEffect&, |
| EffectKey, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray&, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); |
| |
| /** |
| * Subclasses of GrGLLightingEffect must call INHERITED::setData(); |
| */ |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
| |
| protected: |
| virtual void emitLightFunc(GrGLShaderBuilder*, SkString* funcName) = 0; |
| |
| private: |
| typedef GrGLEffect INHERITED; |
| |
| UniformHandle fImageIncrementUni; |
| UniformHandle fSurfaceScaleUni; |
| GrGLLight* fLight; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLDiffuseLightingEffect : public GrGLLightingEffect { |
| public: |
| GrGLDiffuseLightingEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect); |
| virtual void emitLightFunc(GrGLShaderBuilder*, SkString* funcName) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLightingEffect INHERITED; |
| |
| UniformHandle fKDUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLSpecularLightingEffect : public GrGLLightingEffect { |
| public: |
| GrGLSpecularLightingEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& effect); |
| virtual void emitLightFunc(GrGLShaderBuilder*, SkString* funcName) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLightingEffect INHERITED; |
| |
| UniformHandle fKSUni; |
| UniformHandle fShininessUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrLightingEffect::GrLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix) |
| : INHERITED(texture, MakeDivByTextureWHMatrix(texture)) |
| , fLight(light) |
| , fSurfaceScale(surfaceScale) |
| , fFilterMatrix(matrix) { |
| fLight->ref(); |
| if (light->requiresFragmentPosition()) { |
| this->setWillReadFragmentPosition(); |
| } |
| } |
| |
| GrLightingEffect::~GrLightingEffect() { |
| fLight->unref(); |
| } |
| |
| bool GrLightingEffect::onIsEqual(const GrEffect& sBase) const { |
| const GrLightingEffect& s = CastEffect<GrLightingEffect>(sBase); |
| return this->texture(0) == s.texture(0) && |
| fLight->isEqual(*s.fLight) && |
| fSurfaceScale == s.fSurfaceScale; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrDiffuseLightingEffect::GrDiffuseLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix, |
| SkScalar kd) |
| : INHERITED(texture, light, surfaceScale, matrix), fKD(kd) { |
| } |
| |
| const GrBackendEffectFactory& GrDiffuseLightingEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrDiffuseLightingEffect>::getInstance(); |
| } |
| |
| bool GrDiffuseLightingEffect::onIsEqual(const GrEffect& sBase) const { |
| const GrDiffuseLightingEffect& s = CastEffect<GrDiffuseLightingEffect>(sBase); |
| return INHERITED::onIsEqual(sBase) && |
| this->kd() == s.kd(); |
| } |
| |
| GR_DEFINE_EFFECT_TEST(GrDiffuseLightingEffect); |
| |
| GrEffectRef* GrDiffuseLightingEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| const GrDrawTargetCaps&, |
| GrTexture* textures[]) { |
| SkScalar surfaceScale = random->nextSScalar1(); |
| SkScalar kd = random->nextUScalar1(); |
| SkAutoTUnref<SkLight> light(create_random_light(random)); |
| SkMatrix matrix; |
| for (int i = 0; i < 9; i++) { |
| matrix[i] = random->nextUScalar1(); |
| } |
| return GrDiffuseLightingEffect::Create(textures[GrEffectUnitTest::kAlphaTextureIdx], |
| light, surfaceScale, matrix, kd); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrGLLightingEffect::GrGLLightingEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED(factory) { |
| const GrLightingEffect& m = drawEffect.castEffect<GrLightingEffect>(); |
| fLight = m.light()->createGLLight(); |
| } |
| |
| GrGLLightingEffect::~GrGLLightingEffect() { |
| delete fLight; |
| } |
| |
| void GrGLLightingEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect&, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray& coords, |
| const TextureSamplerArray& samplers) { |
| SkString coords2D = builder->ensureFSCoords2D(coords, 0); |
| |
| fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec2f_GrSLType, |
| "ImageIncrement"); |
| fSurfaceScaleUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, |
| "SurfaceScale"); |
| fLight->emitLightColorUniform(builder); |
| SkString lightFunc; |
| this->emitLightFunc(builder, &lightFunc); |
| static const GrGLShaderVar gSobelArgs[] = { |
| GrGLShaderVar("a", kFloat_GrSLType), |
| GrGLShaderVar("b", kFloat_GrSLType), |
| GrGLShaderVar("c", kFloat_GrSLType), |
| GrGLShaderVar("d", kFloat_GrSLType), |
| GrGLShaderVar("e", kFloat_GrSLType), |
| GrGLShaderVar("f", kFloat_GrSLType), |
| GrGLShaderVar("scale", kFloat_GrSLType), |
| }; |
| SkString sobelFuncName; |
| builder->fsEmitFunction(kFloat_GrSLType, |
| "sobel", |
| SK_ARRAY_COUNT(gSobelArgs), |
| gSobelArgs, |
| "\treturn (-a + b - 2.0 * c + 2.0 * d -e + f) * scale;\n", |
| &sobelFuncName); |
| static const GrGLShaderVar gPointToNormalArgs[] = { |
| GrGLShaderVar("x", kFloat_GrSLType), |
| GrGLShaderVar("y", kFloat_GrSLType), |
| GrGLShaderVar("scale", kFloat_GrSLType), |
| }; |
| SkString pointToNormalName; |
| builder->fsEmitFunction(kVec3f_GrSLType, |
| "pointToNormal", |
| SK_ARRAY_COUNT(gPointToNormalArgs), |
| gPointToNormalArgs, |
| "\treturn normalize(vec3(-x * scale, y * scale, 1));\n", |
| &pointToNormalName); |
| |
| static const GrGLShaderVar gInteriorNormalArgs[] = { |
| GrGLShaderVar("m", kFloat_GrSLType, 9), |
| GrGLShaderVar("surfaceScale", kFloat_GrSLType), |
| }; |
| SkString interiorNormalBody; |
| interiorNormalBody.appendf("\treturn %s(%s(m[0], m[2], m[3], m[5], m[6], m[8], 0.25),\n" |
| "\t %s(m[0], m[6], m[1], m[7], m[2], m[8], 0.25),\n" |
| "\t surfaceScale);\n", |
| pointToNormalName.c_str(), |
| sobelFuncName.c_str(), |
| sobelFuncName.c_str()); |
| SkString interiorNormalName; |
| builder->fsEmitFunction(kVec3f_GrSLType, |
| "interiorNormal", |
| SK_ARRAY_COUNT(gInteriorNormalArgs), |
| gInteriorNormalArgs, |
| interiorNormalBody.c_str(), |
| &interiorNormalName); |
| |
| builder->fsCodeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str()); |
| builder->fsCodeAppend("\t\tfloat m[9];\n"); |
| |
| const char* imgInc = builder->getUniformCStr(fImageIncrementUni); |
| const char* surfScale = builder->getUniformCStr(fSurfaceScaleUni); |
| |
| int index = 0; |
| for (int dy = -1; dy <= 1; dy++) { |
| for (int dx = -1; dx <= 1; dx++) { |
| SkString texCoords; |
| texCoords.appendf("coord + vec2(%d, %d) * %s", dx, dy, imgInc); |
| builder->fsCodeAppendf("\t\tm[%d] = ", index++); |
| builder->fsAppendTextureLookup(samplers[0], texCoords.c_str()); |
| builder->fsCodeAppend(".a;\n"); |
| } |
| } |
| builder->fsCodeAppend("\t\tvec3 surfaceToLight = "); |
| SkString arg; |
| arg.appendf("%s * m[4]", surfScale); |
| fLight->emitSurfaceToLight(builder, arg.c_str()); |
| builder->fsCodeAppend(";\n"); |
| builder->fsCodeAppendf("\t\t%s = %s(%s(m, %s), surfaceToLight, ", |
| outputColor, lightFunc.c_str(), interiorNormalName.c_str(), surfScale); |
| fLight->emitLightColor(builder, "surfaceToLight"); |
| builder->fsCodeAppend(");\n"); |
| SkString modulate; |
| GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); |
| builder->fsCodeAppend(modulate.c_str()); |
| } |
| |
| GrGLEffect::EffectKey GrGLLightingEffect::GenKey(const GrDrawEffect& drawEffect, |
| const GrGLCaps& caps) { |
| return drawEffect.castEffect<GrLightingEffect>().light()->type(); |
| } |
| |
| void GrGLLightingEffect::setData(const GrGLUniformManager& uman, |
| const GrDrawEffect& drawEffect) { |
| const GrLightingEffect& lighting = drawEffect.castEffect<GrLightingEffect>(); |
| GrTexture* texture = lighting.texture(0); |
| float ySign = texture->origin() == kTopLeft_GrSurfaceOrigin ? -1.0f : 1.0f; |
| uman.set2f(fImageIncrementUni, 1.0f / texture->width(), ySign / texture->height()); |
| uman.set1f(fSurfaceScaleUni, lighting.surfaceScale()); |
| SkAutoTUnref<SkLight> transformedLight(lighting.light()->transform(lighting.filterMatrix())); |
| fLight->setData(uman, transformedLight); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrGLDiffuseLightingEffect::GrGLDiffuseLightingEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED(factory, drawEffect) { |
| } |
| |
| void GrGLDiffuseLightingEffect::emitLightFunc(GrGLShaderBuilder* builder, SkString* funcName) { |
| const char* kd; |
| fKDUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, |
| "KD", |
| &kd); |
| |
| static const GrGLShaderVar gLightArgs[] = { |
| GrGLShaderVar("normal", kVec3f_GrSLType), |
| GrGLShaderVar("surfaceToLight", kVec3f_GrSLType), |
| GrGLShaderVar("lightColor", kVec3f_GrSLType) |
| }; |
| SkString lightBody; |
| lightBody.appendf("\tfloat colorScale = %s * dot(normal, surfaceToLight);\n", kd); |
| lightBody.appendf("\treturn vec4(lightColor * clamp(colorScale, 0.0, 1.0), 1.0);\n"); |
| builder->fsEmitFunction(kVec4f_GrSLType, |
| "light", |
| SK_ARRAY_COUNT(gLightArgs), |
| gLightArgs, |
| lightBody.c_str(), |
| funcName); |
| } |
| |
| void GrGLDiffuseLightingEffect::setData(const GrGLUniformManager& uman, |
| const GrDrawEffect& drawEffect) { |
| INHERITED::setData(uman, drawEffect); |
| const GrDiffuseLightingEffect& diffuse = drawEffect.castEffect<GrDiffuseLightingEffect>(); |
| uman.set1f(fKDUni, diffuse.kd()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrSpecularLightingEffect::GrSpecularLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| const SkMatrix& matrix, |
| SkScalar ks, |
| SkScalar shininess) |
| : INHERITED(texture, light, surfaceScale, matrix), |
| fKS(ks), |
| fShininess(shininess) { |
| } |
| |
| const GrBackendEffectFactory& GrSpecularLightingEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrSpecularLightingEffect>::getInstance(); |
| } |
| |
| bool GrSpecularLightingEffect::onIsEqual(const GrEffect& sBase) const { |
| const GrSpecularLightingEffect& s = CastEffect<GrSpecularLightingEffect>(sBase); |
| return INHERITED::onIsEqual(sBase) && |
| this->ks() == s.ks() && |
| this->shininess() == s.shininess(); |
| } |
| |
| GR_DEFINE_EFFECT_TEST(GrSpecularLightingEffect); |
| |
| GrEffectRef* GrSpecularLightingEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| const GrDrawTargetCaps&, |
| GrTexture* textures[]) { |
| SkScalar surfaceScale = random->nextSScalar1(); |
| SkScalar ks = random->nextUScalar1(); |
| SkScalar shininess = random->nextUScalar1(); |
| SkAutoTUnref<SkLight> light(create_random_light(random)); |
| SkMatrix matrix; |
| for (int i = 0; i < 9; i++) { |
| matrix[i] = random->nextUScalar1(); |
| } |
| return GrSpecularLightingEffect::Create(textures[GrEffectUnitTest::kAlphaTextureIdx], |
| light, surfaceScale, matrix, ks, shininess); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrGLSpecularLightingEffect::GrGLSpecularLightingEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED(factory, drawEffect) { |
| } |
| |
| void GrGLSpecularLightingEffect::emitLightFunc(GrGLShaderBuilder* builder, SkString* funcName) { |
| const char* ks; |
| const char* shininess; |
| |
| fKSUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "KS", &ks); |
| fShininessUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "Shininess", &shininess); |
| |
| static const GrGLShaderVar gLightArgs[] = { |
| GrGLShaderVar("normal", kVec3f_GrSLType), |
| GrGLShaderVar("surfaceToLight", kVec3f_GrSLType), |
| GrGLShaderVar("lightColor", kVec3f_GrSLType) |
| }; |
| SkString lightBody; |
| lightBody.appendf("\tvec3 halfDir = vec3(normalize(surfaceToLight + vec3(0, 0, 1)));\n"); |
| lightBody.appendf("\tfloat colorScale = %s * pow(dot(normal, halfDir), %s);\n", ks, shininess); |
| lightBody.appendf("\tvec3 color = lightColor * clamp(colorScale, 0.0, 1.0);\n"); |
| lightBody.appendf("\treturn vec4(color, max(max(color.r, color.g), color.b));\n"); |
| builder->fsEmitFunction(kVec4f_GrSLType, |
| "light", |
| SK_ARRAY_COUNT(gLightArgs), |
| gLightArgs, |
| lightBody.c_str(), |
| funcName); |
| } |
| |
| void GrGLSpecularLightingEffect::setData(const GrGLUniformManager& uman, |
| const GrDrawEffect& drawEffect) { |
| INHERITED::setData(uman, drawEffect); |
| const GrSpecularLightingEffect& spec = drawEffect.castEffect<GrSpecularLightingEffect>(); |
| uman.set1f(fKSUni, spec.ks()); |
| uman.set1f(fShininessUni, spec.shininess()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| void GrGLLight::emitLightColorUniform(GrGLShaderBuilder* builder) { |
| fColorUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec3f_GrSLType, "LightColor"); |
| } |
| |
| void GrGLLight::emitLightColor(GrGLShaderBuilder* builder, |
| const char *surfaceToLight) { |
| builder->fsCodeAppend(builder->getUniformCStr(this->lightColorUni())); |
| } |
| |
| void GrGLLight::setData(const GrGLUniformManager& uman, |
| const SkLight* light) const { |
| setUniformPoint3(uman, fColorUni, light->color() * SkScalarInvert(SkIntToScalar(255))); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLDistantLight::setData(const GrGLUniformManager& uman, |
| const SkLight* light) const { |
| INHERITED::setData(uman, light); |
| SkASSERT(light->type() == SkLight::kDistant_LightType); |
| const SkDistantLight* distantLight = static_cast<const SkDistantLight*>(light); |
| setUniformNormal3(uman, fDirectionUni, distantLight->direction()); |
| } |
| |
| void GrGLDistantLight::emitSurfaceToLight(GrGLShaderBuilder* builder, const char* z) { |
| const char* dir; |
| fDirectionUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, kVec3f_GrSLType, |
| "LightDirection", &dir); |
| builder->fsCodeAppend(dir); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLPointLight::setData(const GrGLUniformManager& uman, |
| const SkLight* light) const { |
| INHERITED::setData(uman, light); |
| SkASSERT(light->type() == SkLight::kPoint_LightType); |
| const SkPointLight* pointLight = static_cast<const SkPointLight*>(light); |
| setUniformPoint3(uman, fLocationUni, pointLight->location()); |
| } |
| |
| void GrGLPointLight::emitSurfaceToLight(GrGLShaderBuilder* builder, const char* z) { |
| const char* loc; |
| fLocationUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, kVec3f_GrSLType, |
| "LightLocation", &loc); |
| builder->fsCodeAppendf("normalize(%s - vec3(%s.xy, %s))", loc, builder->fragmentPosition(), z); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLSpotLight::setData(const GrGLUniformManager& uman, |
| const SkLight* light) const { |
| INHERITED::setData(uman, light); |
| SkASSERT(light->type() == SkLight::kSpot_LightType); |
| const SkSpotLight* spotLight = static_cast<const SkSpotLight *>(light); |
| setUniformPoint3(uman, fLocationUni, spotLight->location()); |
| uman.set1f(fExponentUni, spotLight->specularExponent()); |
| uman.set1f(fCosInnerConeAngleUni, spotLight->cosInnerConeAngle()); |
| uman.set1f(fCosOuterConeAngleUni, spotLight->cosOuterConeAngle()); |
| uman.set1f(fConeScaleUni, spotLight->coneScale()); |
| setUniformNormal3(uman, fSUni, spotLight->s()); |
| } |
| |
| void GrGLSpotLight::emitSurfaceToLight(GrGLShaderBuilder* builder, const char* z) { |
| const char* location; |
| fLocationUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec3f_GrSLType, "LightLocation", &location); |
| builder->fsCodeAppendf("normalize(%s - vec3(%s.xy, %s))", |
| location, builder->fragmentPosition(), z); |
| } |
| |
| void GrGLSpotLight::emitLightColor(GrGLShaderBuilder* builder, |
| const char *surfaceToLight) { |
| |
| const char* color = builder->getUniformCStr(this->lightColorUni()); // created by parent class. |
| |
| const char* exponent; |
| const char* cosInner; |
| const char* cosOuter; |
| const char* coneScale; |
| const char* s; |
| fExponentUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "Exponent", &exponent); |
| fCosInnerConeAngleUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "CosInnerConeAngle", &cosInner); |
| fCosOuterConeAngleUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "CosOuterConeAngle", &cosOuter); |
| fConeScaleUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "ConeScale", &coneScale); |
| fSUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec3f_GrSLType, "S", &s); |
| |
| static const GrGLShaderVar gLightColorArgs[] = { |
| GrGLShaderVar("surfaceToLight", kVec3f_GrSLType) |
| }; |
| SkString lightColorBody; |
| lightColorBody.appendf("\tfloat cosAngle = -dot(surfaceToLight, %s);\n", s); |
| lightColorBody.appendf("\tif (cosAngle < %s) {\n", cosOuter); |
| lightColorBody.appendf("\t\treturn vec3(0);\n"); |
| lightColorBody.appendf("\t}\n"); |
| lightColorBody.appendf("\tfloat scale = pow(cosAngle, %s);\n", exponent); |
| lightColorBody.appendf("\tif (cosAngle < %s) {\n", cosInner); |
| lightColorBody.appendf("\t\treturn %s * scale * (cosAngle - %s) * %s;\n", |
| color, cosOuter, coneScale); |
| lightColorBody.appendf("\t}\n"); |
| lightColorBody.appendf("\treturn %s;\n", color); |
| builder->fsEmitFunction(kVec3f_GrSLType, |
| "lightColor", |
| SK_ARRAY_COUNT(gLightColorArgs), |
| gLightColorArgs, |
| lightColorBody.c_str(), |
| &fLightColorFunc); |
| |
| builder->fsCodeAppendf("%s(%s)", fLightColorFunc.c_str(), surfaceToLight); |
| } |
| |
| #endif |
| |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingImageFilter) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiffuseLightingImageFilter) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpecularLightingImageFilter) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
