| /* |
| * 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 "SkMatrixConvolutionImageFilter.h" |
| #include "SkBitmap.h" |
| #include "SkColorPriv.h" |
| #include "SkFlattenableBuffers.h" |
| #include "SkRect.h" |
| #include "SkUnPreMultiply.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "gl/GrGLEffect.h" |
| #include "effects/GrSingleTextureEffect.h" |
| #include "GrTBackendEffectFactory.h" |
| #include "GrTexture.h" |
| #include "SkMatrix.h" |
| #endif |
| |
| static bool tile_mode_is_valid(SkMatrixConvolutionImageFilter::TileMode tileMode) { |
| switch (tileMode) { |
| case SkMatrixConvolutionImageFilter::kClamp_TileMode: |
| case SkMatrixConvolutionImageFilter::kRepeat_TileMode: |
| case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode: |
| return true; |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| SkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter( |
| const SkISize& kernelSize, |
| const SkScalar* kernel, |
| SkScalar gain, |
| SkScalar bias, |
| const SkIPoint& target, |
| TileMode tileMode, |
| bool convolveAlpha, |
| SkImageFilter* input, |
| const CropRect* cropRect) |
| : INHERITED(input, cropRect), |
| fKernelSize(kernelSize), |
| fGain(gain), |
| fBias(bias), |
| fTarget(target), |
| fTileMode(tileMode), |
| fConvolveAlpha(convolveAlpha) { |
| uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; |
| fKernel = SkNEW_ARRAY(SkScalar, size); |
| memcpy(fKernel, kernel, size * sizeof(SkScalar)); |
| SkASSERT(kernelSize.fWidth >= 1 && kernelSize.fHeight >= 1); |
| SkASSERT(target.fX >= 0 && target.fX < kernelSize.fWidth); |
| SkASSERT(target.fY >= 0 && target.fY < kernelSize.fHeight); |
| } |
| |
| SkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) { |
| fKernelSize.fWidth = buffer.readInt(); |
| fKernelSize.fHeight = buffer.readInt(); |
| if ((fKernelSize.fWidth >= 1) && (fKernelSize.fHeight >= 1) && |
| // Make sure size won't be larger than a signed int, |
| // which would still be extremely large for a kernel, |
| // but we don't impose a hard limit for kernel size |
| (SK_MaxS32 / fKernelSize.fWidth >= fKernelSize.fHeight)) { |
| uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; |
| fKernel = SkNEW_ARRAY(SkScalar, size); |
| uint32_t readSize = buffer.readScalarArray(fKernel); |
| SkASSERT(readSize == size); |
| buffer.validate(readSize == size); |
| } else { |
| fKernel = 0; |
| } |
| fGain = buffer.readScalar(); |
| fBias = buffer.readScalar(); |
| fTarget.fX = buffer.readInt(); |
| fTarget.fY = buffer.readInt(); |
| fTileMode = (TileMode) buffer.readInt(); |
| fConvolveAlpha = buffer.readBool(); |
| buffer.validate((fKernel != 0) && |
| SkScalarIsFinite(fGain) && |
| SkScalarIsFinite(fBias) && |
| tile_mode_is_valid(fTileMode)); |
| } |
| |
| void SkMatrixConvolutionImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeInt(fKernelSize.fWidth); |
| buffer.writeInt(fKernelSize.fHeight); |
| buffer.writeScalarArray(fKernel, fKernelSize.fWidth * fKernelSize.fHeight); |
| buffer.writeScalar(fGain); |
| buffer.writeScalar(fBias); |
| buffer.writeInt(fTarget.fX); |
| buffer.writeInt(fTarget.fY); |
| buffer.writeInt((int) fTileMode); |
| buffer.writeBool(fConvolveAlpha); |
| } |
| |
| SkMatrixConvolutionImageFilter::~SkMatrixConvolutionImageFilter() { |
| delete[] fKernel; |
| } |
| |
| class UncheckedPixelFetcher { |
| public: |
| static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { |
| return *src.getAddr32(x, y); |
| } |
| }; |
| |
| class ClampPixelFetcher { |
| public: |
| static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { |
| x = SkPin32(x, bounds.fLeft, bounds.fRight - 1); |
| y = SkPin32(y, bounds.fTop, bounds.fBottom - 1); |
| return *src.getAddr32(x, y); |
| } |
| }; |
| |
| class RepeatPixelFetcher { |
| public: |
| static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { |
| x = (x - bounds.left()) % bounds.width() + bounds.left(); |
| y = (y - bounds.top()) % bounds.height() + bounds.top(); |
| if (x < bounds.left()) { |
| x += bounds.width(); |
| } |
| if (y < bounds.top()) { |
| y += bounds.height(); |
| } |
| return *src.getAddr32(x, y); |
| } |
| }; |
| |
| class ClampToBlackPixelFetcher { |
| public: |
| static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { |
| if (x < bounds.fLeft || x >= bounds.fRight || y < bounds.fTop || y >= bounds.fBottom) { |
| return 0; |
| } else { |
| return *src.getAddr32(x, y); |
| } |
| } |
| }; |
| |
| template<class PixelFetcher, bool convolveAlpha> |
| void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, |
| SkBitmap* result, |
| const SkIRect& rect, |
| const SkIRect& bounds) { |
| for (int y = rect.fTop; y < rect.fBottom; ++y) { |
| SkPMColor* dptr = result->getAddr32(rect.fLeft - bounds.fLeft, y - bounds.fTop); |
| for (int x = rect.fLeft; x < rect.fRight; ++x) { |
| SkScalar sumA = 0, sumR = 0, sumG = 0, sumB = 0; |
| for (int cy = 0; cy < fKernelSize.fHeight; cy++) { |
| for (int cx = 0; cx < fKernelSize.fWidth; cx++) { |
| SkPMColor s = PixelFetcher::fetch(src, |
| x + cx - fTarget.fX, |
| y + cy - fTarget.fY, |
| bounds); |
| SkScalar k = fKernel[cy * fKernelSize.fWidth + cx]; |
| if (convolveAlpha) { |
| sumA += SkScalarMul(SkIntToScalar(SkGetPackedA32(s)), k); |
| } |
| sumR += SkScalarMul(SkIntToScalar(SkGetPackedR32(s)), k); |
| sumG += SkScalarMul(SkIntToScalar(SkGetPackedG32(s)), k); |
| sumB += SkScalarMul(SkIntToScalar(SkGetPackedB32(s)), k); |
| } |
| } |
| int a = convolveAlpha |
| ? SkClampMax(SkScalarFloorToInt(SkScalarMul(sumA, fGain) + fBias), 255) |
| : 255; |
| int r = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumR, fGain) + fBias), a); |
| int g = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumG, fGain) + fBias), a); |
| int b = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumB, fGain) + fBias), a); |
| if (!convolveAlpha) { |
| a = SkGetPackedA32(PixelFetcher::fetch(src, x, y, bounds)); |
| *dptr++ = SkPreMultiplyARGB(a, r, g, b); |
| } else { |
| *dptr++ = SkPackARGB32(a, r, g, b); |
| } |
| } |
| } |
| } |
| |
| template<class PixelFetcher> |
| void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, |
| SkBitmap* result, |
| const SkIRect& rect, |
| const SkIRect& bounds) { |
| if (fConvolveAlpha) { |
| filterPixels<PixelFetcher, true>(src, result, rect, bounds); |
| } else { |
| filterPixels<PixelFetcher, false>(src, result, rect, bounds); |
| } |
| } |
| |
| void SkMatrixConvolutionImageFilter::filterInteriorPixels(const SkBitmap& src, |
| SkBitmap* result, |
| const SkIRect& rect, |
| const SkIRect& bounds) { |
| filterPixels<UncheckedPixelFetcher>(src, result, rect, bounds); |
| } |
| |
| void SkMatrixConvolutionImageFilter::filterBorderPixels(const SkBitmap& src, |
| SkBitmap* result, |
| const SkIRect& rect, |
| const SkIRect& bounds) { |
| switch (fTileMode) { |
| case kClamp_TileMode: |
| filterPixels<ClampPixelFetcher>(src, result, rect, bounds); |
| break; |
| case kRepeat_TileMode: |
| filterPixels<RepeatPixelFetcher>(src, result, rect, bounds); |
| break; |
| case kClampToBlack_TileMode: |
| filterPixels<ClampToBlackPixelFetcher>(src, result, rect, bounds); |
| break; |
| } |
| } |
| |
| // FIXME: This should be refactored to SkImageFilterUtils for |
| // use by other filters. For now, we assume the input is always |
| // premultiplied and unpremultiply it |
| static SkBitmap unpremultiplyBitmap(const SkBitmap& src) |
| { |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return SkBitmap(); |
| } |
| SkBitmap result; |
| result.setConfig(src.config(), src.width(), src.height()); |
| result.allocPixels(); |
| if (!result.getPixels()) { |
| return SkBitmap(); |
| } |
| for (int y = 0; y < src.height(); ++y) { |
| const uint32_t* srcRow = src.getAddr32(0, y); |
| uint32_t* dstRow = result.getAddr32(0, y); |
| for (int x = 0; x < src.width(); ++x) { |
| dstRow[x] = SkUnPreMultiply::PMColorToColor(srcRow[x]); |
| } |
| } |
| return result; |
| } |
| |
| bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy, |
| const SkBitmap& source, |
| const SkMatrix& matrix, |
| SkBitmap* result, |
| SkIPoint* loc) { |
| SkBitmap src = source; |
| if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) { |
| return false; |
| } |
| |
| if (src.config() != SkBitmap::kARGB_8888_Config) { |
| return false; |
| } |
| |
| SkIRect bounds; |
| src.getBounds(&bounds); |
| if (!this->applyCropRect(&bounds, matrix)) { |
| return false; |
| } |
| |
| if (!fConvolveAlpha && !src.isOpaque()) { |
| src = unpremultiplyBitmap(src); |
| } |
| |
| SkAutoLockPixels alp(src); |
| if (!src.getPixels()) { |
| return false; |
| } |
| |
| result->setConfig(src.config(), bounds.width(), bounds.height()); |
| result->allocPixels(); |
| |
| SkIRect interior = SkIRect::MakeXYWH(bounds.left() + fTarget.fX, |
| bounds.top() + fTarget.fY, |
| bounds.width() - fKernelSize.fWidth + 1, |
| bounds.height() - fKernelSize.fHeight + 1); |
| SkIRect top = SkIRect::MakeLTRB(bounds.left(), bounds.top(), bounds.right(), interior.top()); |
| SkIRect bottom = SkIRect::MakeLTRB(bounds.left(), interior.bottom(), |
| bounds.right(), bounds.bottom()); |
| SkIRect left = SkIRect::MakeLTRB(bounds.left(), interior.top(), |
| interior.left(), interior.bottom()); |
| SkIRect right = SkIRect::MakeLTRB(interior.right(), interior.top(), |
| bounds.right(), interior.bottom()); |
| filterBorderPixels(src, result, top, bounds); |
| filterBorderPixels(src, result, left, bounds); |
| filterInteriorPixels(src, result, interior, bounds); |
| filterBorderPixels(src, result, right, bounds); |
| filterBorderPixels(src, result, bottom, bounds); |
| loc->fX += bounds.fLeft; |
| loc->fY += bounds.fTop; |
| return true; |
| } |
| |
| #if SK_SUPPORT_GPU |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLMatrixConvolutionEffect; |
| |
| class GrMatrixConvolutionEffect : public GrSingleTextureEffect { |
| public: |
| typedef SkMatrixConvolutionImageFilter::TileMode TileMode; |
| static GrEffectRef* Create(GrTexture* texture, |
| const SkIRect& bounds, |
| const SkISize& kernelSize, |
| const SkScalar* kernel, |
| SkScalar gain, |
| SkScalar bias, |
| const SkIPoint& target, |
| TileMode tileMode, |
| bool convolveAlpha) { |
| AutoEffectUnref effect(SkNEW_ARGS(GrMatrixConvolutionEffect, (texture, |
| bounds, |
| kernelSize, |
| kernel, |
| gain, |
| bias, |
| target, |
| tileMode, |
| convolveAlpha))); |
| return CreateEffectRef(effect); |
| } |
| virtual ~GrMatrixConvolutionEffect(); |
| |
| virtual void getConstantColorComponents(GrColor* color, |
| uint32_t* validFlags) const SK_OVERRIDE { |
| // TODO: Try to do better? |
| *validFlags = 0; |
| } |
| |
| static const char* Name() { return "MatrixConvolution"; } |
| const SkIRect& bounds() const { return fBounds; } |
| const SkISize& kernelSize() const { return fKernelSize; } |
| const float* target() const { return fTarget; } |
| const float* kernel() const { return fKernel; } |
| float gain() const { return fGain; } |
| float bias() const { return fBias; } |
| TileMode tileMode() const { return fTileMode; } |
| bool convolveAlpha() const { return fConvolveAlpha; } |
| |
| typedef GrGLMatrixConvolutionEffect GLEffect; |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| |
| private: |
| GrMatrixConvolutionEffect(GrTexture*, |
| const SkIRect& bounds, |
| const SkISize& kernelSize, |
| const SkScalar* kernel, |
| SkScalar gain, |
| SkScalar bias, |
| const SkIPoint& target, |
| TileMode tileMode, |
| bool convolveAlpha); |
| |
| virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
| |
| SkIRect fBounds; |
| SkISize fKernelSize; |
| float *fKernel; |
| float fGain; |
| float fBias; |
| float fTarget[2]; |
| TileMode fTileMode; |
| bool fConvolveAlpha; |
| |
| GR_DECLARE_EFFECT_TEST; |
| |
| typedef GrSingleTextureEffect INHERITED; |
| }; |
| |
| class GrGLMatrixConvolutionEffect : public GrGLEffect { |
| public: |
| GrGLMatrixConvolutionEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& effect); |
| 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&); |
| |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLUniformManager::UniformHandle UniformHandle; |
| typedef SkMatrixConvolutionImageFilter::TileMode TileMode; |
| SkISize fKernelSize; |
| TileMode fTileMode; |
| bool fConvolveAlpha; |
| |
| UniformHandle fBoundsUni; |
| UniformHandle fKernelUni; |
| UniformHandle fImageIncrementUni; |
| UniformHandle fTargetUni; |
| UniformHandle fGainUni; |
| UniformHandle fBiasUni; |
| |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| GrGLMatrixConvolutionEffect::GrGLMatrixConvolutionEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED(factory) { |
| const GrMatrixConvolutionEffect& m = drawEffect.castEffect<GrMatrixConvolutionEffect>(); |
| fKernelSize = m.kernelSize(); |
| fTileMode = m.tileMode(); |
| fConvolveAlpha = m.convolveAlpha(); |
| } |
| |
| static void appendTextureLookup(GrGLShaderBuilder* builder, |
| const GrGLShaderBuilder::TextureSampler& sampler, |
| const char* coord, |
| const char* bounds, |
| SkMatrixConvolutionImageFilter::TileMode tileMode) { |
| SkString clampedCoord; |
| switch (tileMode) { |
| case SkMatrixConvolutionImageFilter::kClamp_TileMode: |
| clampedCoord.printf("clamp(%s, %s.xy, %s.zw)", coord, bounds, bounds); |
| coord = clampedCoord.c_str(); |
| break; |
| case SkMatrixConvolutionImageFilter::kRepeat_TileMode: |
| clampedCoord.printf("mod(%s - %s.xy, %s.zw - %s.xy) + %s.xy", coord, bounds, bounds, bounds, bounds); |
| coord = clampedCoord.c_str(); |
| break; |
| case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode: |
| builder->fsCodeAppendf("clamp(%s, %s.xy, %s.zw) != %s ? vec4(0, 0, 0, 0) : ", coord, bounds, bounds, coord); |
| break; |
| } |
| builder->fsAppendTextureLookup(sampler, coord); |
| } |
| |
| void GrGLMatrixConvolutionEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect&, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray& coords, |
| const TextureSamplerArray& samplers) { |
| sk_ignore_unused_variable(inputColor); |
| SkString coords2D = builder->ensureFSCoords2D(coords, 0); |
| fBoundsUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec4f_GrSLType, "Bounds"); |
| fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec2f_GrSLType, "ImageIncrement"); |
| fKernelUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, |
| "Kernel", |
| fKernelSize.width() * fKernelSize.height()); |
| fTargetUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec2f_GrSLType, "Target"); |
| fGainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "Gain"); |
| fBiasUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, "Bias"); |
| |
| const char* bounds = builder->getUniformCStr(fBoundsUni); |
| const char* target = builder->getUniformCStr(fTargetUni); |
| const char* imgInc = builder->getUniformCStr(fImageIncrementUni); |
| const char* kernel = builder->getUniformCStr(fKernelUni); |
| const char* gain = builder->getUniformCStr(fGainUni); |
| const char* bias = builder->getUniformCStr(fBiasUni); |
| int kWidth = fKernelSize.width(); |
| int kHeight = fKernelSize.height(); |
| |
| builder->fsCodeAppend("\t\tvec4 sum = vec4(0, 0, 0, 0);\n"); |
| builder->fsCodeAppendf("\t\tvec2 coord = %s - %s * %s;\n", coords2D.c_str(), target, imgInc); |
| builder->fsCodeAppendf("\t\tfor (int y = 0; y < %d; y++) {\n", kHeight); |
| builder->fsCodeAppendf("\t\t\tfor (int x = 0; x < %d; x++) {\n", kWidth); |
| builder->fsCodeAppendf("\t\t\t\tfloat k = %s[y * %d + x];\n", kernel, kWidth); |
| builder->fsCodeAppendf("\t\t\t\tvec2 coord2 = coord + vec2(x, y) * %s;\n", imgInc); |
| builder->fsCodeAppend("\t\t\t\tvec4 c = "); |
| appendTextureLookup(builder, samplers[0], "coord2", bounds, fTileMode); |
| builder->fsCodeAppend(";\n"); |
| if (!fConvolveAlpha) { |
| builder->fsCodeAppend("\t\t\t\tc.rgb /= c.a;\n"); |
| } |
| builder->fsCodeAppend("\t\t\t\tsum += c * k;\n"); |
| builder->fsCodeAppend("\t\t\t}\n"); |
| builder->fsCodeAppend("\t\t}\n"); |
| if (fConvolveAlpha) { |
| builder->fsCodeAppendf("\t\t%s = sum * %s + %s;\n", outputColor, gain, bias); |
| builder->fsCodeAppendf("\t\t%s.rgb = clamp(%s.rgb, 0.0, %s.a);\n", |
| outputColor, outputColor, outputColor); |
| } else { |
| builder->fsCodeAppend("\t\tvec4 c = "); |
| appendTextureLookup(builder, samplers[0], coords2D.c_str(), bounds, fTileMode); |
| builder->fsCodeAppend(";\n"); |
| builder->fsCodeAppendf("\t\t%s.a = c.a;\n", outputColor); |
| builder->fsCodeAppendf("\t\t%s.rgb = sum.rgb * %s + %s;\n", outputColor, gain, bias); |
| builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor); |
| } |
| } |
| |
| namespace { |
| |
| int encodeXY(int x, int y) { |
| SkASSERT(x >= 1 && y >= 1 && x * y <= 32); |
| if (y < x) |
| return 0x40 | encodeXY(y, x); |
| else |
| return (0x40 >> x) | (y - x); |
| } |
| |
| }; |
| |
| GrGLEffect::EffectKey GrGLMatrixConvolutionEffect::GenKey(const GrDrawEffect& drawEffect, |
| const GrGLCaps&) { |
| const GrMatrixConvolutionEffect& m = drawEffect.castEffect<GrMatrixConvolutionEffect>(); |
| EffectKey key = encodeXY(m.kernelSize().width(), m.kernelSize().height()); |
| key |= m.tileMode() << 7; |
| key |= m.convolveAlpha() ? 1 << 9 : 0; |
| return key; |
| } |
| |
| void GrGLMatrixConvolutionEffect::setData(const GrGLUniformManager& uman, |
| const GrDrawEffect& drawEffect) { |
| const GrMatrixConvolutionEffect& conv = drawEffect.castEffect<GrMatrixConvolutionEffect>(); |
| GrTexture& texture = *conv.texture(0); |
| // the code we generated was for a specific kernel size |
| SkASSERT(conv.kernelSize() == fKernelSize); |
| SkASSERT(conv.tileMode() == fTileMode); |
| float imageIncrement[2]; |
| float ySign = texture.origin() == kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f; |
| imageIncrement[0] = 1.0f / texture.width(); |
| imageIncrement[1] = ySign / texture.height(); |
| uman.set2fv(fImageIncrementUni, 0, 1, imageIncrement); |
| uman.set2fv(fTargetUni, 0, 1, conv.target()); |
| uman.set1fv(fKernelUni, 0, fKernelSize.width() * fKernelSize.height(), conv.kernel()); |
| uman.set1f(fGainUni, conv.gain()); |
| uman.set1f(fBiasUni, conv.bias()); |
| const SkIRect& bounds = conv.bounds(); |
| float left = (float) bounds.left() / texture.width(); |
| float top = (float) bounds.top() / texture.height(); |
| float right = (float) bounds.right() / texture.width(); |
| float bottom = (float) bounds.bottom() / texture.height(); |
| if (texture.origin() == kBottomLeft_GrSurfaceOrigin) { |
| uman.set4f(fBoundsUni, left, 1.0f - bottom, right, 1.0f - top); |
| } else { |
| uman.set4f(fBoundsUni, left, top, right, bottom); |
| } |
| } |
| |
| GrMatrixConvolutionEffect::GrMatrixConvolutionEffect(GrTexture* texture, |
| const SkIRect& bounds, |
| const SkISize& kernelSize, |
| const SkScalar* kernel, |
| SkScalar gain, |
| SkScalar bias, |
| const SkIPoint& target, |
| TileMode tileMode, |
| bool convolveAlpha) |
| : INHERITED(texture, MakeDivByTextureWHMatrix(texture)), |
| fBounds(bounds), |
| fKernelSize(kernelSize), |
| fGain(SkScalarToFloat(gain)), |
| fBias(SkScalarToFloat(bias) / 255.0f), |
| fTileMode(tileMode), |
| fConvolveAlpha(convolveAlpha) { |
| fKernel = new float[kernelSize.width() * kernelSize.height()]; |
| for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) { |
| fKernel[i] = SkScalarToFloat(kernel[i]); |
| } |
| fTarget[0] = static_cast<float>(target.x()); |
| fTarget[1] = static_cast<float>(target.y()); |
| this->setWillNotUseInputColor(); |
| } |
| |
| GrMatrixConvolutionEffect::~GrMatrixConvolutionEffect() { |
| delete[] fKernel; |
| } |
| |
| const GrBackendEffectFactory& GrMatrixConvolutionEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrMatrixConvolutionEffect>::getInstance(); |
| } |
| |
| bool GrMatrixConvolutionEffect::onIsEqual(const GrEffect& sBase) const { |
| const GrMatrixConvolutionEffect& s = CastEffect<GrMatrixConvolutionEffect>(sBase); |
| return this->texture(0) == s.texture(0) && |
| fKernelSize == s.kernelSize() && |
| !memcmp(fKernel, s.kernel(), |
| fKernelSize.width() * fKernelSize.height() * sizeof(float)) && |
| fGain == s.gain() && |
| fBias == s.bias() && |
| fTarget == s.target() && |
| fTileMode == s.tileMode() && |
| fConvolveAlpha == s.convolveAlpha(); |
| } |
| |
| GR_DEFINE_EFFECT_TEST(GrMatrixConvolutionEffect); |
| |
| // A little bit less than the minimum # uniforms required by DX9SM2 (32). |
| // Allows for a 5x5 kernel (or 25x1, for that matter). |
| #define MAX_KERNEL_SIZE 25 |
| |
| GrEffectRef* GrMatrixConvolutionEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| const GrDrawTargetCaps&, |
| GrTexture* textures[]) { |
| int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx : |
| GrEffectUnitTest::kAlphaTextureIdx; |
| int width = random->nextRangeU(1, MAX_KERNEL_SIZE); |
| int height = random->nextRangeU(1, MAX_KERNEL_SIZE / width); |
| SkISize kernelSize = SkISize::Make(width, height); |
| SkAutoTDeleteArray<SkScalar> kernel(new SkScalar[width * height]); |
| for (int i = 0; i < width * height; i++) { |
| kernel.get()[i] = random->nextSScalar1(); |
| } |
| SkScalar gain = random->nextSScalar1(); |
| SkScalar bias = random->nextSScalar1(); |
| SkIPoint target = SkIPoint::Make(random->nextRangeU(0, kernelSize.width()), |
| random->nextRangeU(0, kernelSize.height())); |
| SkIRect bounds = SkIRect::MakeXYWH(random->nextRangeU(0, textures[texIdx]->width()), |
| random->nextRangeU(0, textures[texIdx]->height()), |
| random->nextRangeU(0, textures[texIdx]->width()), |
| random->nextRangeU(0, textures[texIdx]->height())); |
| TileMode tileMode = static_cast<TileMode>(random->nextRangeU(0, 2)); |
| bool convolveAlpha = random->nextBool(); |
| return GrMatrixConvolutionEffect::Create(textures[texIdx], |
| bounds, |
| kernelSize, |
| kernel.get(), |
| gain, |
| bias, |
| target, |
| tileMode, |
| convolveAlpha); |
| } |
| |
| bool SkMatrixConvolutionImageFilter::asNewEffect(GrEffectRef** effect, |
| GrTexture* texture, |
| const SkMatrix&, |
| const SkIRect& bounds |
| ) const { |
| if (!effect) { |
| return fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE; |
| } |
| SkASSERT(fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE); |
| *effect = GrMatrixConvolutionEffect::Create(texture, |
| bounds, |
| fKernelSize, |
| fKernel, |
| fGain, |
| fBias, |
| fTarget, |
| fTileMode, |
| fConvolveAlpha); |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #endif |
