| /* |
| * 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 "GrProgramStageFactory.h" |
| #include "effects/GrSingleTextureEffect.h" |
| #include "gl/GrGLProgramStage.h" |
| #include "gl/GrGLTexture.h" |
| #include "GrEffect.h" |
| |
| class GrGLDiffuseLightingEffect; |
| class GrGLSpecularLightingEffect; |
| |
| // For brevity |
| typedef GrGLUniformManager::UniformHandle UniformHandle; |
| static const UniformHandle kInvalidUniformHandle = GrGLUniformManager::kInvalidUniformHandle; |
| #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, |
| SkScalarFloorToInt(color.fX), |
| SkScalarFloorToInt(color.fY), |
| SkScalarFloorToInt(color.fZ)); |
| } |
| 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(SkScalarFloorToInt(color.maxComponent()), |
| SkScalarFloorToInt(color.fX), |
| SkScalarFloorToInt(color.fY), |
| SkScalarFloorToInt(color.fZ)); |
| } |
| 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 LightType* l = static_cast<const LightType*>(light); |
| int y = 0; |
| { |
| const SkPMColor* row1 = src.getAddr32(0, 0); |
| const SkPMColor* row2 = src.getAddr32(0, 1); |
| SkPMColor* dptr = dst->getAddr32(0, 0); |
| int m[9]; |
| int x = 0; |
| 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 = 1; x < src.width() - 1; ++x) |
| { |
| shiftMatrixLeft(m); |
| m[5] = SkGetPackedA32(*row1++); |
| m[8] = SkGetPackedA32(*row2++); |
| surfaceToLight = l->surfaceToLight(x, 0, 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 < src.height() - 1; ++y) { |
| const SkPMColor* row0 = src.getAddr32(0, y - 1); |
| const SkPMColor* row1 = src.getAddr32(0, y); |
| const SkPMColor* row2 = src.getAddr32(0, y + 1); |
| SkPMColor* dptr = dst->getAddr32(0, y); |
| int m[9]; |
| int x = 0; |
| 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 = 1; x < src.width() - 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)); |
| } |
| |
| { |
| const SkPMColor* row0 = src.getAddr32(0, src.height() - 2); |
| const SkPMColor* row1 = src.getAddr32(0, src.height() - 1); |
| int x = 0; |
| SkPMColor* dptr = dst->getAddr32(0, src.height() - 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 = 1; x < src.width() - 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(); |
| 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); |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiffuseLightingImageFilter) |
| |
| virtual bool asNewCustomStage(GrEffect** stage, GrTexture*) const SK_OVERRIDE; |
| 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; |
| |
| |
| private: |
| typedef SkLightingImageFilter INHERITED; |
| SkScalar fKD; |
| }; |
| |
| class SkSpecularLightingImageFilter : public SkLightingImageFilter { |
| public: |
| SkSpecularLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess, SkImageFilter* input); |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSpecularLightingImageFilter) |
| |
| virtual bool asNewCustomStage(GrEffect** stage, GrTexture*) const SK_OVERRIDE; |
| 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; |
| |
| 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); |
| virtual ~GrLightingEffect(); |
| |
| virtual bool isEqual(const GrEffect&) const SK_OVERRIDE; |
| |
| const SkLight* light() const { return fLight; } |
| SkScalar surfaceScale() const { return fSurfaceScale; } |
| private: |
| typedef GrSingleTextureEffect INHERITED; |
| const SkLight* fLight; |
| SkScalar fSurfaceScale; |
| }; |
| |
| class GrDiffuseLightingEffect : public GrLightingEffect { |
| public: |
| GrDiffuseLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| SkScalar kd); |
| |
| static const char* Name() { return "DiffuseLighting"; } |
| |
| typedef GrGLDiffuseLightingEffect GLProgramStage; |
| |
| virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE; |
| virtual bool isEqual(const GrEffect&) const SK_OVERRIDE; |
| SkScalar kd() const { return fKD; } |
| private: |
| GR_DECLARE_CUSTOM_STAGE_TEST; |
| typedef GrLightingEffect INHERITED; |
| SkScalar fKD; |
| }; |
| |
| class GrSpecularLightingEffect : public GrLightingEffect { |
| public: |
| GrSpecularLightingEffect(GrTexture* texture, |
| const SkLight* light, |
| SkScalar surfaceScale, |
| SkScalar ks, |
| SkScalar shininess); |
| |
| static const char* Name() { return "SpecularLighting"; } |
| |
| typedef GrGLSpecularLightingEffect GLProgramStage; |
| |
| virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE; |
| virtual bool isEqual(const GrEffect&) const SK_OVERRIDE; |
| SkScalar ks() const { return fKS; } |
| SkScalar shininess() const { return fShininess; } |
| |
| private: |
| GR_DECLARE_CUSTOM_STAGE_TEST; |
| typedef GrLightingEffect INHERITED; |
| SkScalar fKS; |
| SkScalar fShininess; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLLight { |
| public: |
| virtual ~GrGLLight() {} |
| virtual void setupVariables(GrGLShaderBuilder* builder); |
| virtual void emitVS(SkString* out) const {} |
| virtual void emitFuncs(GrGLShaderBuilder* builder) {} |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, |
| SkString* out, |
| const char* z) const = 0; |
| virtual void emitLightColor(GrGLShaderBuilder*, |
| const char *surfaceToLight) const; |
| virtual void setData(const GrGLUniformManager&, const SkLight* light) const; |
| |
| private: |
| typedef SkRefCnt INHERITED; |
| |
| protected: |
| UniformHandle fColorUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLDistantLight : public GrGLLight { |
| public: |
| virtual ~GrGLDistantLight() {} |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const SkLight* light) const SK_OVERRIDE; |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, |
| SkString* out, |
| const char* z) const SK_OVERRIDE; |
| private: |
| typedef GrGLLight INHERITED; |
| UniformHandle fDirectionUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLPointLight : public GrGLLight { |
| public: |
| virtual ~GrGLPointLight() {} |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const SkLight* light) const SK_OVERRIDE; |
| virtual void emitVS(SkString* out) const SK_OVERRIDE; |
| virtual void emitSurfaceToLight(GrGLShaderBuilder*, |
| SkString* out, |
| const char* z) const SK_OVERRIDE; |
| private: |
| typedef GrGLLight INHERITED; |
| SkPoint3 fLocation; |
| UniformHandle fLocationUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLSpotLight : public GrGLLight { |
| public: |
| virtual ~GrGLSpotLight() {} |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const SkLight* light) const SK_OVERRIDE; |
| virtual void emitVS(SkString* out) const SK_OVERRIDE; |
| virtual void emitFuncs(GrGLShaderBuilder* builder); |
| virtual void emitSurfaceToLight(GrGLShaderBuilder* builder, |
| SkString* out, |
| const char* z) const SK_OVERRIDE; |
| virtual void emitLightColor(GrGLShaderBuilder*, |
| const char *surfaceToLight) const 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 SkFlattenable { |
| 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; |
| } |
| |
| protected: |
| SkLight(SkColor color) |
| : fColor(SkIntToScalar(SkColorGetR(color)), |
| SkIntToScalar(SkColorGetG(color)), |
| SkIntToScalar(SkColorGetB(color))) {} |
| SkLight(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) { |
| fColor = readPoint3(buffer); |
| } |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
| INHERITED::flatten(buffer); |
| writePoint3(fColor, buffer); |
| } |
| |
| private: |
| typedef SkFlattenable 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 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; |
| } |
| |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDistantLight) |
| |
| protected: |
| SkDistantLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| fDirection = readPoint3(buffer); |
| } |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const { |
| INHERITED::flatten(buffer); |
| 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 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; |
| } |
| |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPointLight) |
| |
| protected: |
| SkPointLight(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| fLocation = readPoint3(buffer); |
| } |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const { |
| INHERITED::flatten(buffer); |
| 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(specularExponent) |
| { |
| fS = target - location; |
| fS.normalize(); |
| fCosOuterConeAngle = SkScalarCos(SkDegreesToRadians(cutoffAngle)); |
| const SkScalar antiAliasThreshold = SkFloatToScalar(0.016f); |
| fCosInnerConeAngle = fCosOuterConeAngle + antiAliasThreshold; |
| fConeScale = SkScalarInvert(antiAliasThreshold); |
| } |
| |
| 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 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; } |
| |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSpotLight) |
| |
| protected: |
| 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); |
| } |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const { |
| INHERITED::flatten(buffer); |
| 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: |
| typedef SkLight INHERITED; |
| SkPoint3 fLocation; |
| SkPoint3 fTarget; |
| SkScalar fSpecularExponent; |
| SkScalar fCosOuterConeAngle; |
| SkScalar fCosInnerConeAngle; |
| SkScalar fConeScale; |
| SkPoint3 fS; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkLightingImageFilter::SkLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkImageFilter* input) |
| : INHERITED(input), |
| 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) { |
| return SkNEW_ARGS(SkDiffuseLightingImageFilter, |
| (SkNEW_ARGS(SkDistantLight, (direction, lightColor)), surfaceScale, kd, |
| input)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreatePointLitDiffuse( |
| const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar kd, SkImageFilter* input) { |
| return SkNEW_ARGS(SkDiffuseLightingImageFilter, |
| (SkNEW_ARGS(SkPointLight, (location, lightColor)), surfaceScale, kd, |
| input)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateSpotLitDiffuse( |
| const SkPoint3& location, const SkPoint3& target, |
| SkScalar specularExponent, SkScalar cutoffAngle, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar kd, |
| SkImageFilter* input) { |
| return SkNEW_ARGS(SkDiffuseLightingImageFilter, |
| (SkNEW_ARGS(SkSpotLight, (location, target, specularExponent, |
| cutoffAngle, lightColor)), |
| surfaceScale, kd, input)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateDistantLitSpecular( |
| const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar ks, SkScalar shininess, SkImageFilter* input) { |
| return SkNEW_ARGS(SkSpecularLightingImageFilter, |
| (SkNEW_ARGS(SkDistantLight, (direction, lightColor)), |
| surfaceScale, ks, shininess, input)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreatePointLitSpecular( |
| const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, |
| SkScalar ks, SkScalar shininess, SkImageFilter* input) { |
| return SkNEW_ARGS(SkSpecularLightingImageFilter, |
| (SkNEW_ARGS(SkPointLight, (location, lightColor)), |
| surfaceScale, ks, shininess, input)); |
| } |
| |
| SkImageFilter* SkLightingImageFilter::CreateSpotLitSpecular( |
| const SkPoint3& location, const SkPoint3& target, |
| SkScalar specularExponent, SkScalar cutoffAngle, |
| SkColor lightColor, SkScalar surfaceScale, |
| SkScalar ks, SkScalar shininess, SkImageFilter* input) { |
| return SkNEW_ARGS(SkSpecularLightingImageFilter, |
| (SkNEW_ARGS(SkSpotLight, (location, target, specularExponent, cutoffAngle, lightColor)), |
| surfaceScale, ks, shininess, input)); |
| } |
| |
| SkLightingImageFilter::~SkLightingImageFilter() { |
| fLight->unref(); |
| } |
| |
| SkLightingImageFilter::SkLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) |
| { |
| fLight = buffer.readFlattenableT<SkLight>(); |
| fSurfaceScale = buffer.readScalar(); |
| } |
| |
| void SkLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeFlattenable(fLight); |
| buffer.writeScalar(fSurfaceScale); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar kd, SkImageFilter* input) |
| : SkLightingImageFilter(light, surfaceScale, input), |
| fKD(kd) |
| { |
| } |
| |
| SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) |
| { |
| fKD = buffer.readScalar(); |
| } |
| |
| void SkDiffuseLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeScalar(fKD); |
| } |
| |
| bool SkDiffuseLightingImageFilter::onFilterImage(Proxy*, |
| const SkBitmap& src, |
| const SkMatrix&, |
| SkBitmap* dst, |
| SkIPoint*) { |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| if (src.width() < 2 || src.height() < 2) { |
| return false; |
| } |
| dst->setConfig(src.config(), src.width(), src.height()); |
| dst->allocPixels(); |
| |
| DiffuseLightingType lightingType(fKD); |
| switch (light()->type()) { |
| case SkLight::kDistant_LightType: |
| lightBitmap<DiffuseLightingType, SkDistantLight>(lightingType, light(), src, dst, surfaceScale()); |
| break; |
| case SkLight::kPoint_LightType: |
| lightBitmap<DiffuseLightingType, SkPointLight>(lightingType, light(), src, dst, surfaceScale()); |
| break; |
| case SkLight::kSpot_LightType: |
| lightBitmap<DiffuseLightingType, SkSpotLight>(lightingType, light(), src, dst, surfaceScale()); |
| break; |
| } |
| return true; |
| } |
| |
| bool SkDiffuseLightingImageFilter::asNewCustomStage(GrEffect** stage, |
| GrTexture* texture) const { |
| #if SK_SUPPORT_GPU |
| if (stage) { |
| SkScalar scale = SkScalarMul(surfaceScale(), SkIntToScalar(255)); |
| *stage = SkNEW_ARGS(GrDiffuseLightingEffect, (texture, light(), scale, kd())); |
| } |
| return true; |
| #else |
| SkDEBUGFAIL("Should not call in GPU-less build"); |
| return false; |
| #endif |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess, SkImageFilter* input) |
| : SkLightingImageFilter(light, surfaceScale, input), |
| fKS(ks), |
| fShininess(shininess) |
| { |
| } |
| |
| SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) |
| { |
| fKS = buffer.readScalar(); |
| fShininess = buffer.readScalar(); |
| } |
| |
| void SkSpecularLightingImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeScalar(fKS); |
| buffer.writeScalar(fShininess); |
| } |
| |
| bool SkSpecularLightingImageFilter::onFilterImage(Proxy*, |
| const SkBitmap& src, |
| const SkMatrix&, |
| SkBitmap* dst, |
| SkIPoint*) { |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| if (src.width() < 2 || src.height() < 2) { |
| return false; |
| } |
| dst->setConfig(src.config(), src.width(), src.height()); |
| dst->allocPixels(); |
| |
| SpecularLightingType lightingType(fKS, fShininess); |
| switch (light()->type()) { |
| case SkLight::kDistant_LightType: |
| lightBitmap<SpecularLightingType, SkDistantLight>(lightingType, light(), src, dst, surfaceScale()); |
| break; |
| case SkLight::kPoint_LightType: |
| lightBitmap<SpecularLightingType, SkPointLight>(lightingType, light(), src, dst, surfaceScale()); |
| break; |
| case SkLight::kSpot_LightType: |
| lightBitmap<SpecularLightingType, SkSpotLight>(lightingType, light(), src, dst, surfaceScale()); |
| break; |
| } |
| return true; |
| } |
| |
| bool SkSpecularLightingImageFilter::asNewCustomStage(GrEffect** stage, |
| GrTexture* texture) const { |
| #if SK_SUPPORT_GPU |
| if (stage) { |
| SkScalar scale = SkScalarMul(surfaceScale(), SkIntToScalar(255)); |
| *stage = SkNEW_ARGS(GrSpecularLightingEffect, (texture, light(), scale, ks(), shininess())); |
| } |
| return true; |
| #else |
| SkDEBUGFAIL("Should not call in GPU-less build"); |
| return false; |
| #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 GrGLLegacyProgramStage { |
| public: |
| GrGLLightingEffect(const GrProgramStageFactory& factory, |
| const GrEffect& stage); |
| virtual ~GrGLLightingEffect(); |
| |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void emitVS(GrGLShaderBuilder* builder, |
| const char* vertexCoords) SK_OVERRIDE; |
| virtual void emitFS(GrGLShaderBuilder* builder, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| virtual void emitLightFunc(GrGLShaderBuilder*, SkString* funcName) = 0; |
| |
| static inline StageKey GenKey(const GrEffect& s, const GrGLCaps& caps); |
| |
| virtual void setData(const GrGLUniformManager&, const GrEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLegacyProgramStage INHERITED; |
| |
| UniformHandle fImageIncrementUni; |
| UniformHandle fSurfaceScaleUni; |
| GrGLLight* fLight; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLDiffuseLightingEffect : public GrGLLightingEffect { |
| public: |
| GrGLDiffuseLightingEffect(const GrProgramStageFactory& factory, |
| const GrEffect& stage); |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void emitLightFunc(GrGLShaderBuilder*, SkString* funcName) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const GrEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLightingEffect INHERITED; |
| |
| UniformHandle fKDUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLSpecularLightingEffect : public GrGLLightingEffect { |
| public: |
| GrGLSpecularLightingEffect(const GrProgramStageFactory& factory, |
| const GrEffect& stage); |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void emitLightFunc(GrGLShaderBuilder*, SkString* funcName) SK_OVERRIDE; |
| virtual void setData(const GrGLUniformManager&, const GrEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLLightingEffect INHERITED; |
| |
| UniformHandle fKSUni; |
| UniformHandle fShininessUni; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrLightingEffect::GrLightingEffect(GrTexture* texture, const SkLight* light, SkScalar surfaceScale) |
| : GrSingleTextureEffect(texture) |
| , fLight(light) |
| , fSurfaceScale(surfaceScale) { |
| fLight->ref(); |
| } |
| |
| GrLightingEffect::~GrLightingEffect() { |
| fLight->unref(); |
| } |
| |
| bool GrLightingEffect::isEqual(const GrEffect& sBase) const { |
| const GrLightingEffect& s = |
| static_cast<const GrLightingEffect&>(sBase); |
| return INHERITED::isEqual(sBase) && |
| fLight->isEqual(*s.fLight) && |
| fSurfaceScale == s.fSurfaceScale; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrDiffuseLightingEffect::GrDiffuseLightingEffect(GrTexture* texture, const SkLight* light, SkScalar surfaceScale, SkScalar kd) |
| : INHERITED(texture, light, surfaceScale), fKD(kd) { |
| } |
| |
| const GrProgramStageFactory& GrDiffuseLightingEffect::getFactory() const { |
| return GrTProgramStageFactory<GrDiffuseLightingEffect>::getInstance(); |
| } |
| |
| bool GrDiffuseLightingEffect::isEqual(const GrEffect& sBase) const { |
| const GrDiffuseLightingEffect& s = |
| static_cast<const GrDiffuseLightingEffect&>(sBase); |
| return INHERITED::isEqual(sBase) && |
| this->kd() == s.kd(); |
| } |
| |
| GR_DEFINE_CUSTOM_STAGE_TEST(GrDiffuseLightingEffect); |
| |
| GrEffect* GrDiffuseLightingEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| GrTexture* textures[]) { |
| SkScalar surfaceScale = random->nextSScalar1(); |
| SkScalar kd = random->nextUScalar1(); |
| SkAutoTUnref<SkLight> light(create_random_light(random)); |
| return SkNEW_ARGS(GrDiffuseLightingEffect, (textures[GrEffectUnitTest::kAlphaTextureIdx], |
| light, surfaceScale, kd)); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrGLLightingEffect::GrGLLightingEffect(const GrProgramStageFactory& factory, |
| const GrEffect& stage) |
| : INHERITED(factory) |
| , fImageIncrementUni(kInvalidUniformHandle) |
| , fSurfaceScaleUni(kInvalidUniformHandle) { |
| const GrLightingEffect& m = static_cast<const GrLightingEffect&>(stage); |
| fLight = m.light()->createGLLight(); |
| } |
| |
| GrGLLightingEffect::~GrGLLightingEffect() { |
| delete fLight; |
| } |
| |
| void GrGLLightingEffect::setupVariables(GrGLShaderBuilder* builder) { |
| fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec2f_GrSLType, |
| "ImageIncrement"); |
| fSurfaceScaleUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, |
| "SurfaceScale"); |
| fLight->setupVariables(builder); |
| } |
| |
| void GrGLLightingEffect::emitVS(GrGLShaderBuilder* builder, |
| const char* vertexCoords) { |
| fLight->emitVS(&builder->fVSCode); |
| } |
| |
| void GrGLLightingEffect::emitFS(GrGLShaderBuilder* builder, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray& samplers) { |
| SkString* code = &builder->fFSCode; |
| fLight->emitFuncs(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->emitFunction(GrGLShaderBuilder::kFragment_ShaderType, |
| 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->emitFunction(GrGLShaderBuilder::kFragment_ShaderType, |
| 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->emitFunction(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec3f_GrSLType, |
| "interiorNormal", |
| SK_ARRAY_COUNT(gInteriorNormalArgs), |
| gInteriorNormalArgs, |
| interiorNormalBody.c_str(), |
| &interiorNormalName); |
| |
| code->appendf("\t\tvec2 coord = %s;\n", builder->defaultTexCoordsName()); |
| code->appendf("\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); |
| code->appendf("\t\tm[%d] = ", index++); |
| builder->appendTextureLookup(code, samplers[0], texCoords.c_str()); |
| code->appendf(".a;\n"); |
| } |
| } |
| code->appendf("\t\tvec3 surfaceToLight = "); |
| SkString arg; |
| arg.appendf("%s * m[4]", surfScale); |
| fLight->emitSurfaceToLight(builder, code, arg.c_str()); |
| code->append(";\n"); |
| code->appendf("\t\t%s = %s(%s(m, %s), surfaceToLight, ", |
| outputColor, lightFunc.c_str(), interiorNormalName.c_str(), surfScale); |
| fLight->emitLightColor(builder, "surfaceToLight"); |
| code->append(");\n"); |
| GrGLSLMulVarBy4f(code, 2, outputColor, inputColor); |
| } |
| |
| GrGLProgramStage::StageKey GrGLLightingEffect::GenKey(const GrEffect& s, |
| const GrGLCaps& caps) { |
| return static_cast<const GrLightingEffect&>(s).light()->type(); |
| } |
| |
| void GrGLLightingEffect::setData(const GrGLUniformManager& uman, const GrEffect& data) { |
| const GrLightingEffect& effect = |
| static_cast<const GrLightingEffect&>(data); |
| GrGLTexture* texture = static_cast<GrGLTexture*>(data.texture(0)); |
| float ySign = texture->orientation() == GrGLTexture::kTopDown_Orientation ? -1.0f : 1.0f; |
| uman.set2f(fImageIncrementUni, 1.0f / texture->width(), ySign / texture->height()); |
| uman.set1f(fSurfaceScaleUni, effect.surfaceScale()); |
| fLight->setData(uman, effect.light()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrGLDiffuseLightingEffect::GrGLDiffuseLightingEffect(const GrProgramStageFactory& factory, |
| const GrEffect& stage) |
| : INHERITED(factory, stage) |
| , fKDUni(kInvalidUniformHandle) { |
| } |
| |
| void GrGLDiffuseLightingEffect::setupVariables(GrGLShaderBuilder* builder) { |
| INHERITED::setupVariables(builder); |
| fKDUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, kFloat_GrSLType, "KD"); |
| } |
| |
| void GrGLDiffuseLightingEffect::emitLightFunc(GrGLShaderBuilder* builder, SkString* funcName) { |
| const char* kd = builder->getUniformCStr(fKDUni); |
| 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->emitFunction(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec4f_GrSLType, |
| "light", |
| SK_ARRAY_COUNT(gLightArgs), |
| gLightArgs, |
| lightBody.c_str(), |
| funcName); |
| } |
| |
| void GrGLDiffuseLightingEffect::setData(const GrGLUniformManager& uman, const GrEffect& data) { |
| INHERITED::setData(uman, data); |
| const GrDiffuseLightingEffect& effect = |
| static_cast<const GrDiffuseLightingEffect&>(data); |
| uman.set1f(fKDUni, effect.kd()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrSpecularLightingEffect::GrSpecularLightingEffect(GrTexture* texture, const SkLight* light, SkScalar surfaceScale, SkScalar ks, SkScalar shininess) |
| : INHERITED(texture, light, surfaceScale), |
| fKS(ks), |
| fShininess(shininess) { |
| } |
| |
| const GrProgramStageFactory& GrSpecularLightingEffect::getFactory() const { |
| return GrTProgramStageFactory<GrSpecularLightingEffect>::getInstance(); |
| } |
| |
| bool GrSpecularLightingEffect::isEqual(const GrEffect& sBase) const { |
| const GrSpecularLightingEffect& s = |
| static_cast<const GrSpecularLightingEffect&>(sBase); |
| return INHERITED::isEqual(sBase) && |
| this->ks() == s.ks() && |
| this->shininess() == s.shininess(); |
| } |
| |
| GR_DEFINE_CUSTOM_STAGE_TEST(GrSpecularLightingEffect); |
| |
| GrEffect* GrSpecularLightingEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| GrTexture* textures[]) { |
| SkScalar surfaceScale = random->nextSScalar1(); |
| SkScalar ks = random->nextUScalar1(); |
| SkScalar shininess = random->nextUScalar1(); |
| SkAutoTUnref<SkLight> light(create_random_light(random)); |
| return SkNEW_ARGS(GrSpecularLightingEffect, (textures[GrEffectUnitTest::kAlphaTextureIdx], |
| light, surfaceScale, ks, shininess)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrGLSpecularLightingEffect::GrGLSpecularLightingEffect(const GrProgramStageFactory& factory, |
| const GrEffect& stage) |
| : GrGLLightingEffect(factory, stage) |
| , fKSUni(kInvalidUniformHandle) |
| , fShininessUni(kInvalidUniformHandle) { |
| } |
| |
| void GrGLSpecularLightingEffect::setupVariables(GrGLShaderBuilder* builder) { |
| INHERITED::setupVariables(builder); |
| fKSUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, "KS"); |
| fShininessUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, "Shininess"); |
| } |
| |
| void GrGLSpecularLightingEffect::emitLightFunc(GrGLShaderBuilder* builder, SkString* funcName) { |
| const char* ks = builder->getUniformCStr(fKSUni); |
| const char* shininess = builder->getUniformCStr(fShininessUni); |
| |
| 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("\treturn vec4(lightColor * clamp(colorScale, 0.0, 1.0), 1.0);\n"); |
| builder->emitFunction(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec4f_GrSLType, |
| "light", |
| SK_ARRAY_COUNT(gLightArgs), |
| gLightArgs, |
| lightBody.c_str(), |
| funcName); |
| } |
| |
| void GrGLSpecularLightingEffect::setData(const GrGLUniformManager& uman, |
| const GrEffect& data) { |
| INHERITED::setData(uman, data); |
| const GrSpecularLightingEffect& effect = static_cast<const GrSpecularLightingEffect&>(data); |
| uman.set1f(fKSUni, effect.ks()); |
| uman.set1f(fShininessUni, effect.shininess()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLLight::emitLightColor(GrGLShaderBuilder* builder, |
| const char *surfaceToLight) const { |
| const char* color = builder->getUniformCStr(fColorUni); |
| builder->fFSCode.append(color); |
| } |
| |
| void GrGLLight::setupVariables(GrGLShaderBuilder* builder) { |
| fColorUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec3f_GrSLType, "LightColor"); |
| } |
| |
| void GrGLLight::setData(const GrGLUniformManager& uman, |
| const SkLight* light) const { |
| setUniformPoint3(uman, fColorUni, light->color() * SkScalarInvert(SkIntToScalar(255))); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLDistantLight::setupVariables(GrGLShaderBuilder* builder) { |
| INHERITED::setupVariables(builder); |
| fDirectionUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, kVec3f_GrSLType, |
| "LightDirection"); |
| } |
| |
| 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, |
| SkString* out, |
| const char* z) const { |
| const char* dir = builder->getUniformCStr(fDirectionUni); |
| out->append(dir); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLPointLight::setupVariables(GrGLShaderBuilder* builder) { |
| INHERITED::setupVariables(builder); |
| fLocationUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, kVec3f_GrSLType, |
| "LightLocation"); |
| } |
| |
| 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::emitVS(SkString* out) const { |
| } |
| |
| void GrGLPointLight::emitSurfaceToLight(GrGLShaderBuilder* builder, |
| SkString* out, |
| const char* z) const { |
| const char* loc = builder->getUniformCStr(fLocationUni); |
| out->appendf("normalize(%s - vec3(%s.xy, %s))", loc, builder->fragmentPosition(), z); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void GrGLSpotLight::setupVariables(GrGLShaderBuilder* builder) { |
| INHERITED::setupVariables(builder); |
| fLocationUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec3f_GrSLType, "LightLocation"); |
| fExponentUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, "Exponent"); |
| fCosInnerConeAngleUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, "CosInnerConeAngle"); |
| fCosOuterConeAngleUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, "CosOuterConeAngle"); |
| fConeScaleUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kFloat_GrSLType, "ConeScale"); |
| fSUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec3f_GrSLType, "S"); |
| } |
| |
| 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::emitVS(SkString* out) const { |
| } |
| |
| void GrGLSpotLight::emitFuncs(GrGLShaderBuilder* builder) { |
| const char* exponent = builder->getUniformCStr(fExponentUni); |
| const char* cosInner = builder->getUniformCStr(fCosInnerConeAngleUni); |
| const char* cosOuter = builder->getUniformCStr(fCosOuterConeAngleUni); |
| const char* coneScale = builder->getUniformCStr(fConeScaleUni); |
| const char* s = builder->getUniformCStr(fSUni); |
| const char* color = builder->getUniformCStr(fColorUni); |
| 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->emitFunction(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec3f_GrSLType, |
| "lightColor", |
| SK_ARRAY_COUNT(gLightColorArgs), |
| gLightColorArgs, |
| lightColorBody.c_str(), |
| &fLightColorFunc); |
| } |
| |
| void GrGLSpotLight::emitSurfaceToLight(GrGLShaderBuilder* builder, |
| SkString* out, |
| const char* z) const { |
| const char* location= builder->getUniformCStr(fLocationUni); |
| out->appendf("normalize(%s - vec3(%s.xy, %s))", location, builder->fragmentPosition(), z); |
| } |
| |
| void GrGLSpotLight::emitLightColor(GrGLShaderBuilder* builder, |
| const char *surfaceToLight) const { |
| builder->fFSCode.appendf("%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_ENTRY(SkDistantLight) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPointLight) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpotLight) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |