| /* |
| * 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 "SkMorphologyImageFilter.h" |
| #include "SkBitmap.h" |
| #include "SkColorPriv.h" |
| #include "SkFlattenableBuffers.h" |
| #include "SkRect.h" |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "GrTexture.h" |
| #include "GrGpu.h" |
| #include "gl/GrGLProgramStage.h" |
| #include "effects/Gr1DKernelEffect.h" |
| #endif |
| |
| SkMorphologyImageFilter::SkMorphologyImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) { |
| fRadius.fWidth = buffer.readInt(); |
| fRadius.fHeight = buffer.readInt(); |
| } |
| |
| SkMorphologyImageFilter::SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input) |
| : INHERITED(input), fRadius(SkISize::Make(radiusX, radiusY)) { |
| } |
| |
| |
| void SkMorphologyImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeInt(fRadius.fWidth); |
| buffer.writeInt(fRadius.fHeight); |
| } |
| |
| static void erode(const SkPMColor* src, SkPMColor* dst, |
| int radius, int width, int height, |
| int srcStrideX, int srcStrideY, |
| int dstStrideX, int dstStrideY) |
| { |
| radius = SkMin32(radius, width - 1); |
| const SkPMColor* upperSrc = src + radius * srcStrideX; |
| for (int x = 0; x < width; ++x) { |
| const SkPMColor* lp = src; |
| const SkPMColor* up = upperSrc; |
| SkPMColor* dptr = dst; |
| for (int y = 0; y < height; ++y) { |
| int minB = 255, minG = 255, minR = 255, minA = 255; |
| for (const SkPMColor* p = lp; p <= up; p += srcStrideX) { |
| int b = SkGetPackedB32(*p); |
| int g = SkGetPackedG32(*p); |
| int r = SkGetPackedR32(*p); |
| int a = SkGetPackedA32(*p); |
| if (b < minB) minB = b; |
| if (g < minG) minG = g; |
| if (r < minR) minR = r; |
| if (a < minA) minA = a; |
| } |
| *dptr = SkPackARGB32(minA, minR, minG, minB); |
| dptr += dstStrideY; |
| lp += srcStrideY; |
| up += srcStrideY; |
| } |
| if (x >= radius) src += srcStrideX; |
| if (x + radius < width - 1) upperSrc += srcStrideX; |
| dst += dstStrideX; |
| } |
| } |
| |
| static void erodeX(const SkBitmap& src, SkBitmap* dst, int radiusX) |
| { |
| erode(src.getAddr32(0, 0), dst->getAddr32(0, 0), |
| radiusX, src.width(), src.height(), |
| 1, src.rowBytesAsPixels(), 1, dst->rowBytesAsPixels()); |
| } |
| |
| static void erodeY(const SkBitmap& src, SkBitmap* dst, int radiusY) |
| { |
| erode(src.getAddr32(0, 0), dst->getAddr32(0, 0), |
| radiusY, src.height(), src.width(), |
| src.rowBytesAsPixels(), 1, dst->rowBytesAsPixels(), 1); |
| } |
| |
| static void dilate(const SkPMColor* src, SkPMColor* dst, |
| int radius, int width, int height, |
| int srcStrideX, int srcStrideY, |
| int dstStrideX, int dstStrideY) |
| { |
| radius = SkMin32(radius, width - 1); |
| const SkPMColor* upperSrc = src + radius * srcStrideX; |
| for (int x = 0; x < width; ++x) { |
| const SkPMColor* lp = src; |
| const SkPMColor* up = upperSrc; |
| SkPMColor* dptr = dst; |
| for (int y = 0; y < height; ++y) { |
| int maxB = 0, maxG = 0, maxR = 0, maxA = 0; |
| for (const SkPMColor* p = lp; p <= up; p += srcStrideX) { |
| int b = SkGetPackedB32(*p); |
| int g = SkGetPackedG32(*p); |
| int r = SkGetPackedR32(*p); |
| int a = SkGetPackedA32(*p); |
| if (b > maxB) maxB = b; |
| if (g > maxG) maxG = g; |
| if (r > maxR) maxR = r; |
| if (a > maxA) maxA = a; |
| } |
| *dptr = SkPackARGB32(maxA, maxR, maxG, maxB); |
| dptr += dstStrideY; |
| lp += srcStrideY; |
| up += srcStrideY; |
| } |
| if (x >= radius) src += srcStrideX; |
| if (x + radius < width - 1) upperSrc += srcStrideX; |
| dst += dstStrideX; |
| } |
| } |
| |
| static void dilateX(const SkBitmap& src, SkBitmap* dst, int radiusX) |
| { |
| dilate(src.getAddr32(0, 0), dst->getAddr32(0, 0), |
| radiusX, src.width(), src.height(), |
| 1, src.rowBytesAsPixels(), 1, dst->rowBytesAsPixels()); |
| } |
| |
| static void dilateY(const SkBitmap& src, SkBitmap* dst, int radiusY) |
| { |
| dilate(src.getAddr32(0, 0), dst->getAddr32(0, 0), |
| radiusY, src.height(), src.width(), |
| src.rowBytesAsPixels(), 1, dst->rowBytesAsPixels(), 1); |
| } |
| |
| bool SkErodeImageFilter::onFilterImage(Proxy* proxy, |
| const SkBitmap& source, const SkMatrix& ctm, |
| SkBitmap* dst, SkIPoint* offset) { |
| SkBitmap src = this->getInputResult(proxy, source, ctm, offset); |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| |
| dst->setConfig(src.config(), src.width(), src.height()); |
| dst->allocPixels(); |
| |
| int width = radius().width(); |
| int height = radius().height(); |
| |
| if (width < 0 || height < 0) { |
| return false; |
| } |
| |
| if (width == 0 && height == 0) { |
| src.copyTo(dst, dst->config()); |
| return true; |
| } |
| |
| SkBitmap temp; |
| temp.setConfig(dst->config(), dst->width(), dst->height()); |
| if (!temp.allocPixels()) { |
| return false; |
| } |
| |
| if (width > 0 && height > 0) { |
| erodeX(src, &temp, width); |
| erodeY(temp, dst, height); |
| } else if (width > 0) { |
| erodeX(src, dst, width); |
| } else if (height > 0) { |
| erodeY(src, dst, height); |
| } |
| return true; |
| } |
| |
| bool SkDilateImageFilter::onFilterImage(Proxy* proxy, |
| const SkBitmap& source, const SkMatrix& ctm, |
| SkBitmap* dst, SkIPoint* offset) { |
| SkBitmap src = this->getInputResult(proxy, source, ctm, offset); |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| |
| dst->setConfig(src.config(), src.width(), src.height()); |
| dst->allocPixels(); |
| |
| int width = radius().width(); |
| int height = radius().height(); |
| |
| if (width < 0 || height < 0) { |
| return false; |
| } |
| |
| if (width == 0 && height == 0) { |
| src.copyTo(dst, dst->config()); |
| return true; |
| } |
| |
| SkBitmap temp; |
| temp.setConfig(dst->config(), dst->width(), dst->height()); |
| if (!temp.allocPixels()) { |
| return false; |
| } |
| |
| if (width > 0 && height > 0) { |
| dilateX(src, &temp, width); |
| dilateY(temp, dst, height); |
| } else if (width > 0) { |
| dilateX(src, dst, width); |
| } else if (height > 0) { |
| dilateY(src, dst, height); |
| } |
| return true; |
| } |
| |
| #if SK_SUPPORT_GPU |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLMorphologyEffect; |
| |
| /** |
| * Morphology effects. Depending upon the type of morphology, either the |
| * component-wise min (Erode_Type) or max (Dilate_Type) of all pixels in the |
| * kernel is selected as the new color. The new color is modulated by the input |
| * color. |
| */ |
| class GrMorphologyEffect : public Gr1DKernelEffect { |
| |
| public: |
| |
| enum MorphologyType { |
| kErode_MorphologyType, |
| kDilate_MorphologyType, |
| }; |
| |
| GrMorphologyEffect(GrTexture*, Direction, int radius, MorphologyType); |
| virtual ~GrMorphologyEffect(); |
| |
| MorphologyType type() const { return fType; } |
| |
| static const char* Name() { return "Morphology"; } |
| |
| typedef GrGLMorphologyEffect GLProgramStage; |
| |
| virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE; |
| virtual bool isEqual(const GrCustomStage&) const SK_OVERRIDE; |
| |
| protected: |
| |
| MorphologyType fType; |
| |
| private: |
| GR_DECLARE_CUSTOM_STAGE_TEST; |
| |
| typedef Gr1DKernelEffect INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLMorphologyEffect : public GrGLProgramStage { |
| public: |
| GrGLMorphologyEffect (const GrProgramStageFactory& factory, |
| const GrCustomStage& stage); |
| |
| virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| virtual void emitVS(GrGLShaderBuilder* state, |
| const char* vertexCoords) SK_OVERRIDE {}; |
| virtual void emitFS(GrGLShaderBuilder* state, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| static inline StageKey GenKey(const GrCustomStage& s, const GrGLCaps& caps); |
| |
| virtual void setData(const GrGLUniformManager&, |
| const GrCustomStage&, |
| const GrRenderTarget*, |
| int stageNum) SK_OVERRIDE; |
| |
| private: |
| int width() const { return GrMorphologyEffect::WidthFromRadius(fRadius); } |
| |
| int fRadius; |
| GrMorphologyEffect::MorphologyType fType; |
| GrGLUniformManager::UniformHandle fImageIncrementUni; |
| |
| typedef GrGLProgramStage INHERITED; |
| }; |
| |
| GrGLMorphologyEffect::GrGLMorphologyEffect(const GrProgramStageFactory& factory, |
| const GrCustomStage& stage) |
| : GrGLProgramStage(factory) |
| , fImageIncrementUni(GrGLUniformManager::kInvalidUniformHandle) { |
| const GrMorphologyEffect& m = static_cast<const GrMorphologyEffect&>(stage); |
| fRadius = m.radius(); |
| fType = m.type(); |
| } |
| |
| void GrGLMorphologyEffect::setupVariables(GrGLShaderBuilder* builder) { |
| fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| kVec2f_GrSLType, "ImageIncrement"); |
| } |
| |
| void GrGLMorphologyEffect::emitFS(GrGLShaderBuilder* builder, |
| const char* outputColor, |
| const char* inputColor, |
| const TextureSamplerArray& samplers) { |
| SkString* code = &builder->fFSCode; |
| |
| const char* func; |
| switch (fType) { |
| case GrMorphologyEffect::kErode_MorphologyType: |
| code->appendf("\t\t%s = vec4(1, 1, 1, 1);\n", outputColor); |
| func = "min"; |
| break; |
| case GrMorphologyEffect::kDilate_MorphologyType: |
| code->appendf("\t\t%s = vec4(0, 0, 0, 0);\n", outputColor); |
| func = "max"; |
| break; |
| default: |
| GrCrash("Unexpected type"); |
| func = ""; // suppress warning |
| break; |
| } |
| const char* imgInc = builder->getUniformCStr(fImageIncrementUni); |
| |
| code->appendf("\t\tvec2 coord = %s - %d.0 * %s;\n", |
| builder->defaultTexCoordsName(), fRadius, imgInc); |
| code->appendf("\t\tfor (int i = 0; i < %d; i++) {\n", this->width()); |
| code->appendf("\t\t\t%s = %s(%s, ", outputColor, func, outputColor); |
| builder->appendTextureLookup(&builder->fFSCode, samplers[0], "coord"); |
| code->appendf(");\n"); |
| code->appendf("\t\t\tcoord += %s;\n", imgInc); |
| code->appendf("\t\t}\n"); |
| GrGLSLMulVarBy4f(code, 2, outputColor, inputColor); |
| } |
| |
| GrGLProgramStage::StageKey GrGLMorphologyEffect::GenKey(const GrCustomStage& s, |
| const GrGLCaps& caps) { |
| const GrMorphologyEffect& m = static_cast<const GrMorphologyEffect&>(s); |
| StageKey key = static_cast<StageKey>(m.radius()); |
| key |= (m.type() << 8); |
| return key; |
| } |
| |
| void GrGLMorphologyEffect::setData(const GrGLUniformManager& uman, |
| const GrCustomStage& data, |
| const GrRenderTarget*, |
| int stageNum) { |
| const Gr1DKernelEffect& kern = |
| static_cast<const Gr1DKernelEffect&>(data); |
| GrGLTexture& texture = |
| *static_cast<GrGLTexture*>(data.texture(0)); |
| // the code we generated was for a specific kernel radius |
| GrAssert(kern.radius() == fRadius); |
| float imageIncrement[2] = { 0 }; |
| switch (kern.direction()) { |
| case Gr1DKernelEffect::kX_Direction: |
| imageIncrement[0] = 1.0f / texture.width(); |
| break; |
| case Gr1DKernelEffect::kY_Direction: |
| imageIncrement[1] = 1.0f / texture.height(); |
| break; |
| default: |
| GrCrash("Unknown filter direction."); |
| } |
| uman.set2fv(fImageIncrementUni, 0, 1, imageIncrement); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrMorphologyEffect::GrMorphologyEffect(GrTexture* texture, |
| Direction direction, |
| int radius, |
| MorphologyType type) |
| : Gr1DKernelEffect(texture, direction, radius) |
| , fType(type) { |
| } |
| |
| GrMorphologyEffect::~GrMorphologyEffect() { |
| } |
| |
| const GrProgramStageFactory& GrMorphologyEffect::getFactory() const { |
| return GrTProgramStageFactory<GrMorphologyEffect>::getInstance(); |
| } |
| |
| bool GrMorphologyEffect::isEqual(const GrCustomStage& sBase) const { |
| const GrMorphologyEffect& s = |
| static_cast<const GrMorphologyEffect&>(sBase); |
| return (INHERITED::isEqual(sBase) && |
| this->radius() == s.radius() && |
| this->direction() == s.direction() && |
| this->type() == s.type()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_CUSTOM_STAGE_TEST(GrMorphologyEffect); |
| |
| GrCustomStage* GrMorphologyEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| GrTexture* textures[]) { |
| int texIdx = random->nextBool() ? GrCustomStageUnitTest::kSkiaPMTextureIdx : |
| GrCustomStageUnitTest::kAlphaTextureIdx; |
| Direction dir = random->nextBool() ? kX_Direction : kY_Direction; |
| static const int kMaxRadius = 10; |
| int radius = random->nextRangeU(1, kMaxRadius); |
| MorphologyType type = random->nextBool() ? GrMorphologyEffect::kErode_MorphologyType : |
| GrMorphologyEffect::kDilate_MorphologyType; |
| |
| return SkNEW_ARGS(GrMorphologyEffect, (textures[texIdx], dir, radius, type)); |
| } |
| |
| namespace { |
| |
| void apply_morphology_pass(GrContext* context, |
| GrTexture* texture, |
| const SkRect& rect, |
| int radius, |
| GrMorphologyEffect::MorphologyType morphType, |
| Gr1DKernelEffect::Direction direction) { |
| GrMatrix sampleM; |
| sampleM.setIDiv(texture->width(), texture->height()); |
| GrPaint paint; |
| paint.colorSampler(0)->reset(sampleM); |
| paint.colorSampler(0)->setCustomStage(SkNEW_ARGS(GrMorphologyEffect, (texture, direction, radius, morphType)))->unref(); |
| context->drawRect(paint, rect); |
| } |
| |
| GrTexture* apply_morphology(GrTexture* srcTexture, |
| const GrRect& rect, |
| GrMorphologyEffect::MorphologyType morphType, |
| SkISize radius) { |
| GrContext* context = srcTexture->getContext(); |
| srcTexture->ref(); |
| |
| GrContext::AutoMatrix am; |
| am.setIdentity(context); |
| |
| GrContext::AutoClip acs(context, GrRect::MakeWH(SkIntToScalar(srcTexture->width()), |
| SkIntToScalar(srcTexture->height()))); |
| |
| GrTextureDesc desc; |
| desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit; |
| desc.fWidth = SkScalarCeilToInt(rect.width()); |
| desc.fHeight = SkScalarCeilToInt(rect.height()); |
| desc.fConfig = kRGBA_8888_GrPixelConfig; |
| |
| if (radius.fWidth > 0) { |
| GrAutoScratchTexture ast(context, desc); |
| GrContext::AutoRenderTarget art(context, ast.texture()->asRenderTarget()); |
| apply_morphology_pass(context, srcTexture, rect, radius.fWidth, |
| morphType, Gr1DKernelEffect::kX_Direction); |
| SkIRect clearRect = SkIRect::MakeXYWH( |
| SkScalarFloorToInt(rect.fLeft), |
| SkScalarFloorToInt(rect.fBottom), |
| SkScalarFloorToInt(rect.width()), |
| radius.fHeight); |
| context->clear(&clearRect, 0x0); |
| srcTexture->unref(); |
| srcTexture = ast.detach(); |
| } |
| if (radius.fHeight > 0) { |
| GrAutoScratchTexture ast(context, desc); |
| GrContext::AutoRenderTarget art(context, ast.texture()->asRenderTarget()); |
| apply_morphology_pass(context, srcTexture, rect, radius.fHeight, |
| morphType, Gr1DKernelEffect::kY_Direction); |
| srcTexture->unref(); |
| srcTexture = ast.detach(); |
| } |
| return srcTexture; |
| } |
| |
| }; |
| |
| GrTexture* SkDilateImageFilter::onFilterImageGPU(Proxy* proxy, GrTexture* src, const SkRect& rect) { |
| SkAutoTUnref<GrTexture> input(this->getInputResultAsTexture(proxy, src, rect)); |
| return apply_morphology(input, rect, GrMorphologyEffect::kDilate_MorphologyType, radius()); |
| } |
| |
| GrTexture* SkErodeImageFilter::onFilterImageGPU(Proxy* proxy, GrTexture* src, const SkRect& rect) { |
| SkAutoTUnref<GrTexture> input(this->getInputResultAsTexture(proxy, src, rect)); |
| return apply_morphology(input, rect, GrMorphologyEffect::kErode_MorphologyType, radius()); |
| } |
| |
| #endif |