Index: src/core/SkBlurImageFilter.cpp |
diff --git a/src/core/SkBlurImageFilter.cpp b/src/core/SkBlurImageFilter.cpp |
deleted file mode 100644 |
index ccb3ed8fddc14496981b9beea4535ea9850c6819..0000000000000000000000000000000000000000 |
--- a/src/core/SkBlurImageFilter.cpp |
+++ /dev/null |
@@ -1,296 +0,0 @@ |
-/* |
- * Copyright 2011 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 "SkAutoPixmapStorage.h" |
-#include "SkColorPriv.h" |
-#include "SkGpuBlurUtils.h" |
-#include "SkOpts.h" |
-#include "SkReadBuffer.h" |
-#include "SkSpecialImage.h" |
-#include "SkWriteBuffer.h" |
- |
-#if SK_SUPPORT_GPU |
-#include "GrContext.h" |
-#include "SkGr.h" |
-#endif |
- |
-class SkBlurImageFilterImpl : public SkImageFilter { |
-public: |
- SkBlurImageFilterImpl(SkScalar sigmaX, |
- SkScalar sigmaY, |
- sk_sp<SkImageFilter> input, |
- const CropRect* cropRect); |
- |
- SkRect computeFastBounds(const SkRect&) const override; |
- |
- SK_TO_STRING_OVERRIDE() |
- SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurImageFilterImpl) |
- |
-#ifdef SK_SUPPORT_LEGACY_IMAGEFILTER_PTR |
- static SkImageFilter* Create(SkScalar sigmaX, SkScalar sigmaY, SkImageFilter* input = nullptr, |
- const CropRect* cropRect = nullptr) { |
- return SkImageFilter::MakeBlur(sigmaX, sigmaY, sk_ref_sp<SkImageFilter>(input), |
- cropRect).release(); |
- } |
-#endif |
- |
-protected: |
- void flatten(SkWriteBuffer&) const override; |
- sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&, |
- SkIPoint* offset) const override; |
- SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix&, MapDirection) const override; |
- |
-private: |
- SkSize fSigma; |
- typedef SkImageFilter INHERITED; |
- |
- friend class SkImageFilter; |
-}; |
- |
-SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkImageFilter) |
- SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurImageFilterImpl) |
-SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
- |
-/////////////////////////////////////////////////////////////////////////////// |
- |
-sk_sp<SkImageFilter> SkImageFilter::MakeBlur(SkScalar sigmaX, SkScalar sigmaY, |
- sk_sp<SkImageFilter> input, |
- const CropRect* cropRect) { |
- if (0 == sigmaX && 0 == sigmaY && !cropRect) { |
- return input; |
- } |
- return sk_sp<SkImageFilter>(new SkBlurImageFilterImpl(sigmaX, sigmaY, input, cropRect)); |
-} |
- |
-// This rather arbitrary-looking value results in a maximum box blur kernel size |
-// of 1000 pixels on the raster path, which matches the WebKit and Firefox |
-// implementations. Since the GPU path does not compute a box blur, putting |
-// the limit on sigma ensures consistent behaviour between the GPU and |
-// raster paths. |
-#define MAX_SIGMA SkIntToScalar(532) |
- |
-static SkVector map_sigma(const SkSize& localSigma, const SkMatrix& ctm) { |
- SkVector sigma = SkVector::Make(localSigma.width(), localSigma.height()); |
- ctm.mapVectors(&sigma, 1); |
- sigma.fX = SkMinScalar(SkScalarAbs(sigma.fX), MAX_SIGMA); |
- sigma.fY = SkMinScalar(SkScalarAbs(sigma.fY), MAX_SIGMA); |
- return sigma; |
-} |
- |
-SkBlurImageFilterImpl::SkBlurImageFilterImpl(SkScalar sigmaX, |
- SkScalar sigmaY, |
- sk_sp<SkImageFilter> input, |
- const CropRect* cropRect) |
- : INHERITED(&input, 1, cropRect) |
- , fSigma(SkSize::Make(sigmaX, sigmaY)) { |
-} |
- |
-sk_sp<SkFlattenable> SkBlurImageFilterImpl::CreateProc(SkReadBuffer& buffer) { |
- SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); |
- SkScalar sigmaX = buffer.readScalar(); |
- SkScalar sigmaY = buffer.readScalar(); |
- return SkImageFilter::MakeBlur(sigmaX, sigmaY, common.getInput(0), &common.cropRect()); |
-} |
- |
-void SkBlurImageFilterImpl::flatten(SkWriteBuffer& buffer) const { |
- this->INHERITED::flatten(buffer); |
- buffer.writeScalar(fSigma.fWidth); |
- buffer.writeScalar(fSigma.fHeight); |
-} |
- |
-static void get_box3_params(SkScalar s, int *kernelSize, int* kernelSize3, int *lowOffset, |
- int *highOffset) { |
- float pi = SkScalarToFloat(SK_ScalarPI); |
- int d = static_cast<int>(floorf(SkScalarToFloat(s) * 3.0f * sqrtf(2.0f * pi) / 4.0f + 0.5f)); |
- *kernelSize = d; |
- if (d % 2 == 1) { |
- *lowOffset = *highOffset = (d - 1) / 2; |
- *kernelSize3 = d; |
- } else { |
- *highOffset = d / 2; |
- *lowOffset = *highOffset - 1; |
- *kernelSize3 = d + 1; |
- } |
-} |
- |
-sk_sp<SkSpecialImage> SkBlurImageFilterImpl::onFilterImage(SkSpecialImage* source, |
- const Context& ctx, |
- SkIPoint* offset) const { |
- SkIPoint inputOffset = SkIPoint::Make(0, 0); |
- |
- sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset)); |
- if (!input) { |
- return nullptr; |
- } |
- |
- SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY, |
- input->width(), input->height()); |
- |
- SkIRect dstBounds; |
- if (!this->applyCropRect(this->mapContext(ctx), inputBounds, &dstBounds)) { |
- return nullptr; |
- } |
- if (!inputBounds.intersect(dstBounds)) { |
- return nullptr; |
- } |
- |
- const SkVector sigma = map_sigma(fSigma, ctx.ctm()); |
- |
-#if SK_SUPPORT_GPU |
- if (source->isTextureBacked()) { |
- GrContext* context = source->getContext(); |
- sk_sp<GrTexture> inputTexture(input->asTextureRef(context)); |
- SkASSERT(inputTexture); |
- |
- if (0 == sigma.x() && 0 == sigma.y()) { |
- offset->fX = inputBounds.x(); |
- offset->fY = inputBounds.y(); |
- return input->makeSubset(inputBounds.makeOffset(-inputOffset.x(), |
- -inputOffset.y())); |
- } |
- |
- offset->fX = dstBounds.fLeft; |
- offset->fY = dstBounds.fTop; |
- inputBounds.offset(-inputOffset); |
- dstBounds.offset(-inputOffset); |
- sk_sp<GrDrawContext> drawContext(SkGpuBlurUtils::GaussianBlur( |
- context, |
- inputTexture.get(), |
- sk_ref_sp(source->getColorSpace()), |
- dstBounds, |
- &inputBounds, |
- sigma.x(), |
- sigma.y())); |
- if (!drawContext) { |
- return nullptr; |
- } |
- |
- // TODO: Get the colorSpace from the drawContext (once it has one) |
- return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(dstBounds.width(), dstBounds.height()), |
- kNeedNewImageUniqueID_SpecialImage, |
- drawContext->asTexture(), |
- sk_ref_sp(input->getColorSpace()), &source->props()); |
- } |
-#endif |
- |
- int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX; |
- int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY; |
- get_box3_params(sigma.x(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX); |
- get_box3_params(sigma.y(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY); |
- |
- if (kernelSizeX < 0 || kernelSizeY < 0) { |
- return nullptr; |
- } |
- |
- if (kernelSizeX == 0 && kernelSizeY == 0) { |
- offset->fX = inputBounds.x(); |
- offset->fY = inputBounds.y(); |
- return input->makeSubset(inputBounds.makeOffset(-inputOffset.x(), |
- -inputOffset.y())); |
- } |
- |
- SkBitmap inputBM; |
- |
- if (!input->getROPixels(&inputBM)) { |
- return nullptr; |
- } |
- |
- if (inputBM.colorType() != kN32_SkColorType) { |
- return nullptr; |
- } |
- |
- SkImageInfo info = SkImageInfo::Make(dstBounds.width(), dstBounds.height(), |
- inputBM.colorType(), inputBM.alphaType()); |
- |
- SkBitmap tmp, dst; |
- if (!tmp.tryAllocPixels(info) || !dst.tryAllocPixels(info)) { |
- return nullptr; |
- } |
- |
- SkAutoLockPixels inputLock(inputBM), tmpLock(tmp), dstLock(dst); |
- |
- offset->fX = dstBounds.fLeft; |
- offset->fY = dstBounds.fTop; |
- SkPMColor* t = tmp.getAddr32(0, 0); |
- SkPMColor* d = dst.getAddr32(0, 0); |
- int w = dstBounds.width(), h = dstBounds.height(); |
- const SkPMColor* s = inputBM.getAddr32(inputBounds.x() - inputOffset.x(), |
- inputBounds.y() - inputOffset.y()); |
- inputBounds.offset(-dstBounds.x(), -dstBounds.y()); |
- dstBounds.offset(-dstBounds.x(), -dstBounds.y()); |
- SkIRect inputBoundsT = SkIRect::MakeLTRB(inputBounds.top(), inputBounds.left(), |
- inputBounds.bottom(), inputBounds.right()); |
- SkIRect dstBoundsT = SkIRect::MakeWH(dstBounds.height(), dstBounds.width()); |
- int sw = int(inputBM.rowBytes() >> 2); |
- |
- /** |
- * |
- * In order to make memory accesses cache-friendly, we reorder the passes to |
- * use contiguous memory reads wherever possible. |
- * |
- * For example, the 6 passes of the X-and-Y blur case are rewritten as |
- * follows. Instead of 3 passes in X and 3 passes in Y, we perform |
- * 2 passes in X, 1 pass in X transposed to Y on write, 2 passes in X, |
- * then 1 pass in X transposed to Y on write. |
- * |
- * +----+ +----+ +----+ +---+ +---+ +---+ +----+ |
- * + AB + ----> | AB | ----> | AB | -----> | A | ----> | A | ----> | A | -----> | AB | |
- * +----+ blurX +----+ blurX +----+ blurXY | B | blurX | B | blurX | B | blurXY +----+ |
- * +---+ +---+ +---+ |
- * |
- * In this way, two of the y-blurs become x-blurs applied to transposed |
- * images, and all memory reads are contiguous. |
- */ |
- if (kernelSizeX > 0 && kernelSizeY > 0) { |
- SkOpts::box_blur_xx(s, sw, inputBounds, t, kernelSizeX, lowOffsetX, highOffsetX, w, h); |
- SkOpts::box_blur_xx(t, w, dstBounds, d, kernelSizeX, highOffsetX, lowOffsetX, w, h); |
- SkOpts::box_blur_xy(d, w, dstBounds, t, kernelSizeX3, highOffsetX, highOffsetX, w, h); |
- SkOpts::box_blur_xx(t, h, dstBoundsT, d, kernelSizeY, lowOffsetY, highOffsetY, h, w); |
- SkOpts::box_blur_xx(d, h, dstBoundsT, t, kernelSizeY, highOffsetY, lowOffsetY, h, w); |
- SkOpts::box_blur_xy(t, h, dstBoundsT, d, kernelSizeY3, highOffsetY, highOffsetY, h, w); |
- } else if (kernelSizeX > 0) { |
- SkOpts::box_blur_xx(s, sw, inputBounds, d, kernelSizeX, lowOffsetX, highOffsetX, w, h); |
- SkOpts::box_blur_xx(d, w, dstBounds, t, kernelSizeX, highOffsetX, lowOffsetX, w, h); |
- SkOpts::box_blur_xx(t, w, dstBounds, d, kernelSizeX3, highOffsetX, highOffsetX, w, h); |
- } else if (kernelSizeY > 0) { |
- SkOpts::box_blur_yx(s, sw, inputBoundsT, d, kernelSizeY, lowOffsetY, highOffsetY, h, w); |
- SkOpts::box_blur_xx(d, h, dstBoundsT, t, kernelSizeY, highOffsetY, lowOffsetY, h, w); |
- SkOpts::box_blur_xy(t, h, dstBoundsT, d, kernelSizeY3, highOffsetY, highOffsetY, h, w); |
- } |
- |
- return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(dstBounds.width(), |
- dstBounds.height()), |
- dst, &source->props()); |
-} |
- |
- |
-SkRect SkBlurImageFilterImpl::computeFastBounds(const SkRect& src) const { |
- SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; |
- bounds.outset(SkScalarMul(fSigma.width(), SkIntToScalar(3)), |
- SkScalarMul(fSigma.height(), SkIntToScalar(3))); |
- return bounds; |
-} |
- |
-SkIRect SkBlurImageFilterImpl::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, |
- MapDirection) const { |
- SkVector sigma = map_sigma(fSigma, ctm); |
- return src.makeOutset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))), |
- SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3)))); |
-} |
- |
-#ifndef SK_IGNORE_TO_STRING |
-void SkBlurImageFilterImpl::toString(SkString* str) const { |
- str->appendf("SkBlurImageFilterImpl: ("); |
- str->appendf("sigma: (%f, %f) input (", fSigma.fWidth, fSigma.fHeight); |
- |
- if (this->getInput(0)) { |
- this->getInput(0)->toString(str); |
- } |
- |
- str->append("))"); |
-} |
-#endif |