| /* |
| * Copyright 2006 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 "SkBlurMaskFilter.h" |
| #include "SkBlurMask.h" |
| #include "SkGpuBlurUtils.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkMaskFilter.h" |
| #include "SkRRect.h" |
| #include "SkRTConf.h" |
| #include "SkStringUtils.h" |
| #include "SkStrokeRec.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrCircleBlurFragmentProcessor.h" |
| #include "GrContext.h" |
| #include "GrDrawContext.h" |
| #include "GrTexture.h" |
| #include "GrFragmentProcessor.h" |
| #include "GrInvariantOutput.h" |
| #include "SkDraw.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "glsl/GrGLSLFragmentProcessor.h" |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "glsl/GrGLSLProgramDataManager.h" |
| #include "glsl/GrGLSLSampler.h" |
| #include "glsl/GrGLSLUniformHandler.h" |
| #endif |
| |
| SkScalar SkBlurMaskFilter::ConvertRadiusToSigma(SkScalar radius) { |
| return SkBlurMask::ConvertRadiusToSigma(radius); |
| } |
| |
| class SkBlurMaskFilterImpl : public SkMaskFilter { |
| public: |
| SkBlurMaskFilterImpl(SkScalar sigma, SkBlurStyle, uint32_t flags); |
| |
| // overrides from SkMaskFilter |
| SkMask::Format getFormat() const override; |
| bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&, |
| SkIPoint* margin) const override; |
| |
| #if SK_SUPPORT_GPU |
| bool canFilterMaskGPU(const SkRRect& devRRect, |
| const SkIRect& clipBounds, |
| const SkMatrix& ctm, |
| SkRect* maskRect) const override; |
| bool directFilterMaskGPU(GrTextureProvider* texProvider, |
| GrDrawContext* drawContext, |
| GrPaint* grp, |
| const GrClip&, |
| const SkMatrix& viewMatrix, |
| const SkStrokeRec& strokeRec, |
| const SkPath& path) const override; |
| bool directFilterRRectMaskGPU(GrTextureProvider* texProvider, |
| GrDrawContext* drawContext, |
| GrPaint* grp, |
| const GrClip&, |
| const SkMatrix& viewMatrix, |
| const SkStrokeRec& strokeRec, |
| const SkRRect& rrect) const override; |
| bool filterMaskGPU(GrTexture* src, |
| const SkMatrix& ctm, |
| const SkIRect& maskRect, |
| GrTexture** result) const override; |
| #endif |
| |
| void computeFastBounds(const SkRect&, SkRect*) const override; |
| bool asABlur(BlurRec*) const override; |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurMaskFilterImpl) |
| |
| protected: |
| FilterReturn filterRectsToNine(const SkRect[], int count, const SkMatrix&, |
| const SkIRect& clipBounds, |
| NinePatch*) const override; |
| |
| FilterReturn filterRRectToNine(const SkRRect&, const SkMatrix&, |
| const SkIRect& clipBounds, |
| NinePatch*) const override; |
| |
| bool filterRectMask(SkMask* dstM, const SkRect& r, const SkMatrix& matrix, |
| SkIPoint* margin, SkMask::CreateMode createMode) const; |
| bool filterRRectMask(SkMask* dstM, const SkRRect& r, const SkMatrix& matrix, |
| SkIPoint* margin, SkMask::CreateMode createMode) const; |
| |
| private: |
| // To avoid unseemly allocation requests (esp. for finite platforms like |
| // handset) we limit the radius so something manageable. (as opposed to |
| // a request like 10,000) |
| static const SkScalar kMAX_BLUR_SIGMA; |
| |
| SkScalar fSigma; |
| SkBlurStyle fBlurStyle; |
| uint32_t fBlurFlags; |
| |
| SkBlurQuality getQuality() const { |
| return (fBlurFlags & SkBlurMaskFilter::kHighQuality_BlurFlag) ? |
| kHigh_SkBlurQuality : kLow_SkBlurQuality; |
| } |
| |
| SkBlurMaskFilterImpl(SkReadBuffer&); |
| void flatten(SkWriteBuffer&) const override; |
| |
| SkScalar computeXformedSigma(const SkMatrix& ctm) const { |
| bool ignoreTransform = SkToBool(fBlurFlags & SkBlurMaskFilter::kIgnoreTransform_BlurFlag); |
| |
| SkScalar xformedSigma = ignoreTransform ? fSigma : ctm.mapRadius(fSigma); |
| return SkMinScalar(xformedSigma, kMAX_BLUR_SIGMA); |
| } |
| |
| friend class SkBlurMaskFilter; |
| |
| typedef SkMaskFilter INHERITED; |
| }; |
| |
| const SkScalar SkBlurMaskFilterImpl::kMAX_BLUR_SIGMA = SkIntToScalar(128); |
| |
| sk_sp<SkMaskFilter> SkBlurMaskFilter::Make(SkBlurStyle style, SkScalar sigma, uint32_t flags) { |
| if (!SkScalarIsFinite(sigma) || sigma <= 0) { |
| return nullptr; |
| } |
| if ((unsigned)style > (unsigned)kLastEnum_SkBlurStyle) { |
| return nullptr; |
| } |
| if (flags > SkBlurMaskFilter::kAll_BlurFlag) { |
| return nullptr; |
| } |
| return sk_sp<SkMaskFilter>(new SkBlurMaskFilterImpl(sigma, style, flags)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkBlurMaskFilterImpl::SkBlurMaskFilterImpl(SkScalar sigma, SkBlurStyle style, uint32_t flags) |
| : fSigma(sigma) |
| , fBlurStyle(style) |
| , fBlurFlags(flags) { |
| SkASSERT(fSigma > 0); |
| SkASSERT((unsigned)style <= kLastEnum_SkBlurStyle); |
| SkASSERT(flags <= SkBlurMaskFilter::kAll_BlurFlag); |
| } |
| |
| SkMask::Format SkBlurMaskFilterImpl::getFormat() const { |
| return SkMask::kA8_Format; |
| } |
| |
| bool SkBlurMaskFilterImpl::asABlur(BlurRec* rec) const { |
| if (fBlurFlags & SkBlurMaskFilter::kIgnoreTransform_BlurFlag) { |
| return false; |
| } |
| |
| if (rec) { |
| rec->fSigma = fSigma; |
| rec->fStyle = fBlurStyle; |
| rec->fQuality = this->getQuality(); |
| } |
| return true; |
| } |
| |
| bool SkBlurMaskFilterImpl::filterMask(SkMask* dst, const SkMask& src, |
| const SkMatrix& matrix, |
| SkIPoint* margin) const { |
| SkScalar sigma = this->computeXformedSigma(matrix); |
| return SkBlurMask::BoxBlur(dst, src, sigma, fBlurStyle, this->getQuality(), margin); |
| } |
| |
| bool SkBlurMaskFilterImpl::filterRectMask(SkMask* dst, const SkRect& r, |
| const SkMatrix& matrix, |
| SkIPoint* margin, SkMask::CreateMode createMode) const { |
| SkScalar sigma = computeXformedSigma(matrix); |
| |
| return SkBlurMask::BlurRect(sigma, dst, r, fBlurStyle, margin, createMode); |
| } |
| |
| bool SkBlurMaskFilterImpl::filterRRectMask(SkMask* dst, const SkRRect& r, |
| const SkMatrix& matrix, |
| SkIPoint* margin, SkMask::CreateMode createMode) const { |
| SkScalar sigma = computeXformedSigma(matrix); |
| |
| return SkBlurMask::BlurRRect(sigma, dst, r, fBlurStyle, margin, createMode); |
| } |
| |
| #include "SkCanvas.h" |
| |
| static bool prepare_to_draw_into_mask(const SkRect& bounds, SkMask* mask) { |
| SkASSERT(mask != nullptr); |
| |
| mask->fBounds = bounds.roundOut(); |
| mask->fRowBytes = SkAlign4(mask->fBounds.width()); |
| mask->fFormat = SkMask::kA8_Format; |
| const size_t size = mask->computeImageSize(); |
| mask->fImage = SkMask::AllocImage(size); |
| if (nullptr == mask->fImage) { |
| return false; |
| } |
| |
| // FIXME: use sk_calloc in AllocImage? |
| sk_bzero(mask->fImage, size); |
| return true; |
| } |
| |
| static bool draw_rrect_into_mask(const SkRRect rrect, SkMask* mask) { |
| if (!prepare_to_draw_into_mask(rrect.rect(), mask)) { |
| return false; |
| } |
| |
| // FIXME: This code duplicates code in draw_rects_into_mask, below. Is there a |
| // clean way to share more code? |
| SkBitmap bitmap; |
| bitmap.installMaskPixels(*mask); |
| |
| SkCanvas canvas(bitmap); |
| canvas.translate(-SkIntToScalar(mask->fBounds.left()), |
| -SkIntToScalar(mask->fBounds.top())); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| canvas.drawRRect(rrect, paint); |
| return true; |
| } |
| |
| static bool draw_rects_into_mask(const SkRect rects[], int count, SkMask* mask) { |
| if (!prepare_to_draw_into_mask(rects[0], mask)) { |
| return false; |
| } |
| |
| SkBitmap bitmap; |
| bitmap.installPixels(SkImageInfo::Make(mask->fBounds.width(), |
| mask->fBounds.height(), |
| kAlpha_8_SkColorType, |
| kPremul_SkAlphaType), |
| mask->fImage, mask->fRowBytes); |
| |
| SkCanvas canvas(bitmap); |
| canvas.translate(-SkIntToScalar(mask->fBounds.left()), |
| -SkIntToScalar(mask->fBounds.top())); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| if (1 == count) { |
| canvas.drawRect(rects[0], paint); |
| } else { |
| // todo: do I need a fast way to do this? |
| SkPath path; |
| path.addRect(rects[0]); |
| path.addRect(rects[1]); |
| path.setFillType(SkPath::kEvenOdd_FillType); |
| canvas.drawPath(path, paint); |
| } |
| return true; |
| } |
| |
| static bool rect_exceeds(const SkRect& r, SkScalar v) { |
| return r.fLeft < -v || r.fTop < -v || r.fRight > v || r.fBottom > v || |
| r.width() > v || r.height() > v; |
| } |
| |
| #include "SkMaskCache.h" |
| |
| static SkCachedData* copy_mask_to_cacheddata(SkMask* mask) { |
| const size_t size = mask->computeTotalImageSize(); |
| SkCachedData* data = SkResourceCache::NewCachedData(size); |
| if (data) { |
| memcpy(data->writable_data(), mask->fImage, size); |
| SkMask::FreeImage(mask->fImage); |
| mask->fImage = (uint8_t*)data->data(); |
| } |
| return data; |
| } |
| |
| static SkCachedData* find_cached_rrect(SkMask* mask, SkScalar sigma, SkBlurStyle style, |
| SkBlurQuality quality, const SkRRect& rrect) { |
| return SkMaskCache::FindAndRef(sigma, style, quality, rrect, mask); |
| } |
| |
| static SkCachedData* add_cached_rrect(SkMask* mask, SkScalar sigma, SkBlurStyle style, |
| SkBlurQuality quality, const SkRRect& rrect) { |
| SkCachedData* cache = copy_mask_to_cacheddata(mask); |
| if (cache) { |
| SkMaskCache::Add(sigma, style, quality, rrect, *mask, cache); |
| } |
| return cache; |
| } |
| |
| static SkCachedData* find_cached_rects(SkMask* mask, SkScalar sigma, SkBlurStyle style, |
| SkBlurQuality quality, const SkRect rects[], int count) { |
| return SkMaskCache::FindAndRef(sigma, style, quality, rects, count, mask); |
| } |
| |
| static SkCachedData* add_cached_rects(SkMask* mask, SkScalar sigma, SkBlurStyle style, |
| SkBlurQuality quality, const SkRect rects[], int count) { |
| SkCachedData* cache = copy_mask_to_cacheddata(mask); |
| if (cache) { |
| SkMaskCache::Add(sigma, style, quality, rects, count, *mask, cache); |
| } |
| return cache; |
| } |
| |
| #ifdef SK_IGNORE_FAST_RRECT_BLUR |
| SK_CONF_DECLARE(bool, c_analyticBlurRRect, "mask.filter.blur.analyticblurrrect", false, "Use the faster analytic blur approach for ninepatch rects"); |
| #else |
| SK_CONF_DECLARE(bool, c_analyticBlurRRect, "mask.filter.blur.analyticblurrrect", true, "Use the faster analytic blur approach for ninepatch round rects"); |
| #endif |
| |
| SkMaskFilter::FilterReturn |
| SkBlurMaskFilterImpl::filterRRectToNine(const SkRRect& rrect, const SkMatrix& matrix, |
| const SkIRect& clipBounds, |
| NinePatch* patch) const { |
| SkASSERT(patch != nullptr); |
| switch (rrect.getType()) { |
| case SkRRect::kEmpty_Type: |
| // Nothing to draw. |
| return kFalse_FilterReturn; |
| |
| case SkRRect::kRect_Type: |
| // We should have caught this earlier. |
| SkASSERT(false); |
| // Fall through. |
| case SkRRect::kOval_Type: |
| // The nine patch special case does not handle ovals, and we |
| // already have code for rectangles. |
| return kUnimplemented_FilterReturn; |
| |
| // These three can take advantage of this fast path. |
| case SkRRect::kSimple_Type: |
| case SkRRect::kNinePatch_Type: |
| case SkRRect::kComplex_Type: |
| break; |
| } |
| |
| // TODO: report correct metrics for innerstyle, where we do not grow the |
| // total bounds, but we do need an inset the size of our blur-radius |
| if (kInner_SkBlurStyle == fBlurStyle) { |
| return kUnimplemented_FilterReturn; |
| } |
| |
| // TODO: take clipBounds into account to limit our coordinates up front |
| // for now, just skip too-large src rects (to take the old code path). |
| if (rect_exceeds(rrect.rect(), SkIntToScalar(32767))) { |
| return kUnimplemented_FilterReturn; |
| } |
| |
| SkIPoint margin; |
| SkMask srcM, dstM; |
| srcM.fBounds = rrect.rect().roundOut(); |
| srcM.fFormat = SkMask::kA8_Format; |
| srcM.fRowBytes = 0; |
| |
| bool filterResult = false; |
| if (c_analyticBlurRRect) { |
| // special case for fast round rect blur |
| // don't actually do the blur the first time, just compute the correct size |
| filterResult = this->filterRRectMask(&dstM, rrect, matrix, &margin, |
| SkMask::kJustComputeBounds_CreateMode); |
| } |
| |
| if (!filterResult) { |
| filterResult = this->filterMask(&dstM, srcM, matrix, &margin); |
| } |
| |
| if (!filterResult) { |
| return kFalse_FilterReturn; |
| } |
| |
| // Now figure out the appropriate width and height of the smaller round rectangle |
| // to stretch. It will take into account the larger radius per side as well as double |
| // the margin, to account for inner and outer blur. |
| const SkVector& UL = rrect.radii(SkRRect::kUpperLeft_Corner); |
| const SkVector& UR = rrect.radii(SkRRect::kUpperRight_Corner); |
| const SkVector& LR = rrect.radii(SkRRect::kLowerRight_Corner); |
| const SkVector& LL = rrect.radii(SkRRect::kLowerLeft_Corner); |
| |
| const SkScalar leftUnstretched = SkTMax(UL.fX, LL.fX) + SkIntToScalar(2 * margin.fX); |
| const SkScalar rightUnstretched = SkTMax(UR.fX, LR.fX) + SkIntToScalar(2 * margin.fX); |
| |
| // Extra space in the middle to ensure an unchanging piece for stretching. Use 3 to cover |
| // any fractional space on either side plus 1 for the part to stretch. |
| const SkScalar stretchSize = SkIntToScalar(3); |
| |
| const SkScalar totalSmallWidth = leftUnstretched + rightUnstretched + stretchSize; |
| if (totalSmallWidth >= rrect.rect().width()) { |
| // There is no valid piece to stretch. |
| return kUnimplemented_FilterReturn; |
| } |
| |
| const SkScalar topUnstretched = SkTMax(UL.fY, UR.fY) + SkIntToScalar(2 * margin.fY); |
| const SkScalar bottomUnstretched = SkTMax(LL.fY, LR.fY) + SkIntToScalar(2 * margin.fY); |
| |
| const SkScalar totalSmallHeight = topUnstretched + bottomUnstretched + stretchSize; |
| if (totalSmallHeight >= rrect.rect().height()) { |
| // There is no valid piece to stretch. |
| return kUnimplemented_FilterReturn; |
| } |
| |
| SkRect smallR = SkRect::MakeWH(totalSmallWidth, totalSmallHeight); |
| |
| SkRRect smallRR; |
| SkVector radii[4]; |
| radii[SkRRect::kUpperLeft_Corner] = UL; |
| radii[SkRRect::kUpperRight_Corner] = UR; |
| radii[SkRRect::kLowerRight_Corner] = LR; |
| radii[SkRRect::kLowerLeft_Corner] = LL; |
| smallRR.setRectRadii(smallR, radii); |
| |
| const SkScalar sigma = this->computeXformedSigma(matrix); |
| SkCachedData* cache = find_cached_rrect(&patch->fMask, sigma, fBlurStyle, |
| this->getQuality(), smallRR); |
| if (!cache) { |
| bool analyticBlurWorked = false; |
| if (c_analyticBlurRRect) { |
| analyticBlurWorked = |
| this->filterRRectMask(&patch->fMask, smallRR, matrix, &margin, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode); |
| } |
| |
| if (!analyticBlurWorked) { |
| if (!draw_rrect_into_mask(smallRR, &srcM)) { |
| return kFalse_FilterReturn; |
| } |
| |
| SkAutoMaskFreeImage amf(srcM.fImage); |
| |
| if (!this->filterMask(&patch->fMask, srcM, matrix, &margin)) { |
| return kFalse_FilterReturn; |
| } |
| } |
| cache = add_cached_rrect(&patch->fMask, sigma, fBlurStyle, this->getQuality(), smallRR); |
| } |
| |
| patch->fMask.fBounds.offsetTo(0, 0); |
| patch->fOuterRect = dstM.fBounds; |
| patch->fCenter.fX = SkScalarCeilToInt(leftUnstretched) + 1; |
| patch->fCenter.fY = SkScalarCeilToInt(topUnstretched) + 1; |
| SkASSERT(nullptr == patch->fCache); |
| patch->fCache = cache; // transfer ownership to patch |
| return kTrue_FilterReturn; |
| } |
| |
| SK_CONF_DECLARE(bool, c_analyticBlurNinepatch, "mask.filter.analyticNinePatch", true, "Use the faster analytic blur approach for ninepatch rects"); |
| |
| SkMaskFilter::FilterReturn |
| SkBlurMaskFilterImpl::filterRectsToNine(const SkRect rects[], int count, |
| const SkMatrix& matrix, |
| const SkIRect& clipBounds, |
| NinePatch* patch) const { |
| if (count < 1 || count > 2) { |
| return kUnimplemented_FilterReturn; |
| } |
| |
| // TODO: report correct metrics for innerstyle, where we do not grow the |
| // total bounds, but we do need an inset the size of our blur-radius |
| if (kInner_SkBlurStyle == fBlurStyle || kOuter_SkBlurStyle == fBlurStyle) { |
| return kUnimplemented_FilterReturn; |
| } |
| |
| // TODO: take clipBounds into account to limit our coordinates up front |
| // for now, just skip too-large src rects (to take the old code path). |
| if (rect_exceeds(rects[0], SkIntToScalar(32767))) { |
| return kUnimplemented_FilterReturn; |
| } |
| |
| SkIPoint margin; |
| SkMask srcM, dstM; |
| srcM.fBounds = rects[0].roundOut(); |
| srcM.fFormat = SkMask::kA8_Format; |
| srcM.fRowBytes = 0; |
| |
| bool filterResult = false; |
| if (count == 1 && c_analyticBlurNinepatch) { |
| // special case for fast rect blur |
| // don't actually do the blur the first time, just compute the correct size |
| filterResult = this->filterRectMask(&dstM, rects[0], matrix, &margin, |
| SkMask::kJustComputeBounds_CreateMode); |
| } else { |
| filterResult = this->filterMask(&dstM, srcM, matrix, &margin); |
| } |
| |
| if (!filterResult) { |
| return kFalse_FilterReturn; |
| } |
| |
| /* |
| * smallR is the smallest version of 'rect' that will still guarantee that |
| * we get the same blur results on all edges, plus 1 center row/col that is |
| * representative of the extendible/stretchable edges of the ninepatch. |
| * Since our actual edge may be fractional we inset 1 more to be sure we |
| * don't miss any interior blur. |
| * x is an added pixel of blur, and { and } are the (fractional) edge |
| * pixels from the original rect. |
| * |
| * x x { x x .... x x } x x |
| * |
| * Thus, in this case, we inset by a total of 5 (on each side) beginning |
| * with our outer-rect (dstM.fBounds) |
| */ |
| SkRect smallR[2]; |
| SkIPoint center; |
| |
| // +2 is from +1 for each edge (to account for possible fractional edges |
| int smallW = dstM.fBounds.width() - srcM.fBounds.width() + 2; |
| int smallH = dstM.fBounds.height() - srcM.fBounds.height() + 2; |
| SkIRect innerIR; |
| |
| if (1 == count) { |
| innerIR = srcM.fBounds; |
| center.set(smallW, smallH); |
| } else { |
| SkASSERT(2 == count); |
| rects[1].roundIn(&innerIR); |
| center.set(smallW + (innerIR.left() - srcM.fBounds.left()), |
| smallH + (innerIR.top() - srcM.fBounds.top())); |
| } |
| |
| // +1 so we get a clean, stretchable, center row/col |
| smallW += 1; |
| smallH += 1; |
| |
| // we want the inset amounts to be integral, so we don't change any |
| // fractional phase on the fRight or fBottom of our smallR. |
| const SkScalar dx = SkIntToScalar(innerIR.width() - smallW); |
| const SkScalar dy = SkIntToScalar(innerIR.height() - smallH); |
| if (dx < 0 || dy < 0) { |
| // we're too small, relative to our blur, to break into nine-patch, |
| // so we ask to have our normal filterMask() be called. |
| return kUnimplemented_FilterReturn; |
| } |
| |
| smallR[0].set(rects[0].left(), rects[0].top(), rects[0].right() - dx, rects[0].bottom() - dy); |
| if (smallR[0].width() < 2 || smallR[0].height() < 2) { |
| return kUnimplemented_FilterReturn; |
| } |
| if (2 == count) { |
| smallR[1].set(rects[1].left(), rects[1].top(), |
| rects[1].right() - dx, rects[1].bottom() - dy); |
| SkASSERT(!smallR[1].isEmpty()); |
| } |
| |
| const SkScalar sigma = this->computeXformedSigma(matrix); |
| SkCachedData* cache = find_cached_rects(&patch->fMask, sigma, fBlurStyle, |
| this->getQuality(), smallR, count); |
| if (!cache) { |
| if (count > 1 || !c_analyticBlurNinepatch) { |
| if (!draw_rects_into_mask(smallR, count, &srcM)) { |
| return kFalse_FilterReturn; |
| } |
| |
| SkAutoMaskFreeImage amf(srcM.fImage); |
| |
| if (!this->filterMask(&patch->fMask, srcM, matrix, &margin)) { |
| return kFalse_FilterReturn; |
| } |
| } else { |
| if (!this->filterRectMask(&patch->fMask, smallR[0], matrix, &margin, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode)) { |
| return kFalse_FilterReturn; |
| } |
| } |
| cache = add_cached_rects(&patch->fMask, sigma, fBlurStyle, this->getQuality(), smallR, count); |
| } |
| patch->fMask.fBounds.offsetTo(0, 0); |
| patch->fOuterRect = dstM.fBounds; |
| patch->fCenter = center; |
| SkASSERT(nullptr == patch->fCache); |
| patch->fCache = cache; // transfer ownership to patch |
| return kTrue_FilterReturn; |
| } |
| |
| void SkBlurMaskFilterImpl::computeFastBounds(const SkRect& src, |
| SkRect* dst) const { |
| SkScalar pad = 3.0f * fSigma; |
| |
| dst->set(src.fLeft - pad, src.fTop - pad, |
| src.fRight + pad, src.fBottom + pad); |
| } |
| |
| sk_sp<SkFlattenable> SkBlurMaskFilterImpl::CreateProc(SkReadBuffer& buffer) { |
| const SkScalar sigma = buffer.readScalar(); |
| const unsigned style = buffer.readUInt(); |
| const unsigned flags = buffer.readUInt(); |
| if (style <= kLastEnum_SkBlurStyle) { |
| return SkBlurMaskFilter::Make((SkBlurStyle)style, sigma, flags); |
| } |
| return nullptr; |
| } |
| |
| void SkBlurMaskFilterImpl::flatten(SkWriteBuffer& buffer) const { |
| buffer.writeScalar(fSigma); |
| buffer.writeUInt(fBlurStyle); |
| buffer.writeUInt(fBlurFlags); |
| } |
| |
| #if SK_SUPPORT_GPU |
| |
| class GrGLRectBlurEffect; |
| |
| class GrRectBlurEffect : public GrFragmentProcessor { |
| public: |
| ~GrRectBlurEffect() override { } |
| |
| const char* name() const override { return "RectBlur"; } |
| |
| static sk_sp<GrFragmentProcessor> Make(GrTextureProvider *textureProvider, |
| const SkRect& rect, float sigma) { |
| int doubleProfileSize = SkScalarCeilToInt(12*sigma); |
| |
| if (doubleProfileSize >= rect.width() || doubleProfileSize >= rect.height()) { |
| // if the blur sigma is too large so the gaussian overlaps the whole |
| // rect in either direction, fall back to CPU path for now. |
| return nullptr; |
| } |
| |
| SkAutoTUnref<GrTexture> blurProfile(CreateBlurProfileTexture(textureProvider, sigma)); |
| if (!blurProfile) { |
| return nullptr; |
| } |
| // in OpenGL ES, mediump floats have a minimum range of 2^14. If we have coordinates bigger |
| // than that, the shader math will end up with infinities and result in the blur effect not |
| // working correctly. To avoid this, we switch into highp when the coordinates are too big. |
| // As 2^14 is the minimum range but the actual range can be bigger, we might end up |
| // switching to highp sooner than strictly necessary, but most devices that have a bigger |
| // range for mediump also have mediump being exactly the same as highp (e.g. all non-OpenGL |
| // ES devices), and thus incur no additional penalty for the switch. |
| static const SkScalar kMAX_BLUR_COORD = SkIntToScalar(16000); |
| GrSLPrecision precision; |
| if (SkScalarAbs(rect.top()) > kMAX_BLUR_COORD || |
| SkScalarAbs(rect.left()) > kMAX_BLUR_COORD || |
| SkScalarAbs(rect.bottom()) > kMAX_BLUR_COORD || |
| SkScalarAbs(rect.right()) > kMAX_BLUR_COORD || |
| SkScalarAbs(rect.width()) > kMAX_BLUR_COORD || |
| SkScalarAbs(rect.height()) > kMAX_BLUR_COORD) { |
| precision = kHigh_GrSLPrecision; |
| } else { |
| precision = kDefault_GrSLPrecision; |
| } |
| return sk_sp<GrFragmentProcessor>( |
| new GrRectBlurEffect(rect, sigma, blurProfile, precision)); |
| } |
| |
| const SkRect& getRect() const { return fRect; } |
| float getSigma() const { return fSigma; } |
| GrSLPrecision precision() const { return fPrecision; } |
| |
| private: |
| GrRectBlurEffect(const SkRect& rect, float sigma, GrTexture *blurProfile, |
| GrSLPrecision fPrecision); |
| |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; |
| |
| void onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override; |
| |
| bool onIsEqual(const GrFragmentProcessor&) const override; |
| |
| void onComputeInvariantOutput(GrInvariantOutput* inout) const override; |
| |
| static GrTexture* CreateBlurProfileTexture(GrTextureProvider*, float sigma); |
| |
| SkRect fRect; |
| float fSigma; |
| GrTextureAccess fBlurProfileAccess; |
| GrSLPrecision fPrecision; |
| |
| GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| |
| class GrGLRectBlurEffect : public GrGLSLFragmentProcessor { |
| public: |
| void emitCode(EmitArgs&) override; |
| |
| static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder* b); |
| |
| protected: |
| void onSetData(const GrGLSLProgramDataManager&, const GrProcessor&) override; |
| |
| private: |
| typedef GrGLSLProgramDataManager::UniformHandle UniformHandle; |
| |
| UniformHandle fProxyRectUniform; |
| UniformHandle fProfileSizeUniform; |
| |
| typedef GrGLSLFragmentProcessor INHERITED; |
| }; |
| |
| void OutputRectBlurProfileLookup(GrGLSLFPFragmentBuilder* fragBuilder, |
| GrGLSLFragmentProcessor::SamplerHandle sampler, |
| const char *output, |
| const char *profileSize, const char *loc, |
| const char *blurred_width, |
| const char *sharp_width) { |
| fragBuilder->codeAppendf("float %s;", output); |
| fragBuilder->codeAppendf("{"); |
| fragBuilder->codeAppendf("float coord = ((abs(%s - 0.5 * %s) - 0.5 * %s)) / %s;", |
| loc, blurred_width, sharp_width, profileSize); |
| fragBuilder->codeAppendf("%s = ", output); |
| fragBuilder->appendTextureLookup(sampler, "vec2(coord,0.5)"); |
| fragBuilder->codeAppend(".a;"); |
| fragBuilder->codeAppendf("}"); |
| } |
| |
| |
| void GrGLRectBlurEffect::GenKey(const GrProcessor& proc, const GrGLSLCaps&, |
| GrProcessorKeyBuilder* b) { |
| const GrRectBlurEffect& rbe = proc.cast<GrRectBlurEffect>(); |
| |
| b->add32(rbe.precision()); |
| } |
| |
| |
| void GrGLRectBlurEffect::emitCode(EmitArgs& args) { |
| const GrRectBlurEffect& rbe = args.fFp.cast<GrRectBlurEffect>(); |
| |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; |
| |
| const char *rectName; |
| const char *profileSizeName; |
| |
| SkString precisionString; |
| if (args.fGLSLCaps->usesPrecisionModifiers()) { |
| precisionString.printf("%s ", GrGLSLPrecisionString(rbe.precision())); |
| } |
| fProxyRectUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kVec4f_GrSLType, |
| rbe.precision(), |
| "proxyRect", |
| &rectName); |
| fProfileSizeUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kFloat_GrSLType, |
| kDefault_GrSLPrecision, |
| "profileSize", |
| &profileSizeName); |
| |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| const char *fragmentPos = fragBuilder->fragmentPosition(); |
| |
| if (args.fInputColor) { |
| fragBuilder->codeAppendf("vec4 src=%s;", args.fInputColor); |
| } else { |
| fragBuilder->codeAppendf("vec4 src=vec4(1);"); |
| } |
| |
| fragBuilder->codeAppendf("%s vec2 translatedPos = %s.xy - %s.xy;", precisionString.c_str(), |
| fragmentPos, rectName); |
| fragBuilder->codeAppendf("%s float width = %s.z - %s.x;", precisionString.c_str(), rectName, |
| rectName); |
| fragBuilder->codeAppendf("%s float height = %s.w - %s.y;", precisionString.c_str(), rectName, |
| rectName); |
| |
| fragBuilder->codeAppendf("%s vec2 smallDims = vec2(width - %s, height - %s);", |
| precisionString.c_str(), profileSizeName, profileSizeName); |
| fragBuilder->codeAppendf("%s float center = 2.0 * floor(%s/2.0 + .25) - 1.0;", |
| precisionString.c_str(), profileSizeName); |
| fragBuilder->codeAppendf("%s vec2 wh = smallDims - vec2(center,center);", |
| precisionString.c_str()); |
| |
| OutputRectBlurProfileLookup(fragBuilder, args.fTexSamplers[0], "horiz_lookup", profileSizeName, |
| "translatedPos.x", "width", "wh.x"); |
| OutputRectBlurProfileLookup(fragBuilder, args.fTexSamplers[0], "vert_lookup", profileSizeName, |
| "translatedPos.y", "height", "wh.y"); |
| |
| fragBuilder->codeAppendf("float final = horiz_lookup * vert_lookup;"); |
| fragBuilder->codeAppendf("%s = src * final;", args.fOutputColor); |
| } |
| |
| void GrGLRectBlurEffect::onSetData(const GrGLSLProgramDataManager& pdman, |
| const GrProcessor& proc) { |
| const GrRectBlurEffect& rbe = proc.cast<GrRectBlurEffect>(); |
| SkRect rect = rbe.getRect(); |
| |
| pdman.set4f(fProxyRectUniform, rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); |
| pdman.set1f(fProfileSizeUniform, SkScalarCeilToScalar(6*rbe.getSigma())); |
| } |
| |
| GrTexture* GrRectBlurEffect::CreateBlurProfileTexture(GrTextureProvider* textureProvider, |
| float sigma) { |
| GrSurfaceDesc texDesc; |
| |
| unsigned int profileSize = SkScalarCeilToInt(6*sigma); |
| |
| texDesc.fWidth = profileSize; |
| texDesc.fHeight = 1; |
| texDesc.fConfig = kAlpha_8_GrPixelConfig; |
| texDesc.fIsMipMapped = false; |
| |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey key; |
| GrUniqueKey::Builder builder(&key, kDomain, 1); |
| builder[0] = profileSize; |
| builder.finish(); |
| |
| GrTexture *blurProfile = textureProvider->findAndRefTextureByUniqueKey(key); |
| |
| if (!blurProfile) { |
| SkAutoTDeleteArray<uint8_t> profile(SkBlurMask::ComputeBlurProfile(sigma)); |
| |
| blurProfile = textureProvider->createTexture(texDesc, SkBudgeted::kYes, profile.get(), 0); |
| if (blurProfile) { |
| textureProvider->assignUniqueKeyToTexture(key, blurProfile); |
| } |
| } |
| |
| return blurProfile; |
| } |
| |
| GrRectBlurEffect::GrRectBlurEffect(const SkRect& rect, float sigma, GrTexture *blurProfile, |
| GrSLPrecision precision) |
| : fRect(rect) |
| , fSigma(sigma) |
| , fBlurProfileAccess(blurProfile) |
| , fPrecision(precision) { |
| this->initClassID<GrRectBlurEffect>(); |
| this->addTextureAccess(&fBlurProfileAccess); |
| this->setWillReadFragmentPosition(); |
| } |
| |
| void GrRectBlurEffect::onGetGLSLProcessorKey(const GrGLSLCaps& caps, |
| GrProcessorKeyBuilder* b) const { |
| GrGLRectBlurEffect::GenKey(*this, caps, b); |
| } |
| |
| GrGLSLFragmentProcessor* GrRectBlurEffect::onCreateGLSLInstance() const { |
| return new GrGLRectBlurEffect; |
| } |
| |
| bool GrRectBlurEffect::onIsEqual(const GrFragmentProcessor& sBase) const { |
| const GrRectBlurEffect& s = sBase.cast<GrRectBlurEffect>(); |
| return this->getSigma() == s.getSigma() && this->getRect() == s.getRect(); |
| } |
| |
| void GrRectBlurEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const { |
| inout->mulByUnknownSingleComponent(); |
| } |
| |
| GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRectBlurEffect); |
| |
| sk_sp<GrFragmentProcessor> GrRectBlurEffect::TestCreate(GrProcessorTestData* d) { |
| float sigma = d->fRandom->nextRangeF(3,8); |
| float width = d->fRandom->nextRangeF(200,300); |
| float height = d->fRandom->nextRangeF(200,300); |
| return GrRectBlurEffect::Make(d->fContext->textureProvider(), SkRect::MakeWH(width, height), |
| sigma); |
| } |
| |
| |
| bool SkBlurMaskFilterImpl::directFilterMaskGPU(GrTextureProvider* texProvider, |
| GrDrawContext* drawContext, |
| GrPaint* grp, |
| const GrClip& clip, |
| const SkMatrix& viewMatrix, |
| const SkStrokeRec& strokeRec, |
| const SkPath& path) const { |
| SkASSERT(drawContext); |
| |
| if (fBlurStyle != kNormal_SkBlurStyle) { |
| return false; |
| } |
| |
| // TODO: we could handle blurred stroked circles |
| if (!strokeRec.isFillStyle()) { |
| return false; |
| } |
| |
| SkScalar xformedSigma = this->computeXformedSigma(viewMatrix); |
| |
| sk_sp<GrFragmentProcessor> fp; |
| |
| SkRect rect; |
| if (path.isRect(&rect)) { |
| int pad = SkScalarCeilToInt(6*xformedSigma)/2; |
| rect.outset(SkIntToScalar(pad), SkIntToScalar(pad)); |
| |
| fp = GrRectBlurEffect::Make(texProvider, rect, xformedSigma); |
| } else if (path.isOval(&rect) && SkScalarNearlyEqual(rect.width(), rect.height())) { |
| fp = GrCircleBlurFragmentProcessor::Make(texProvider, rect, xformedSigma); |
| |
| // expand the rect for the coverage geometry |
| int pad = SkScalarCeilToInt(6*xformedSigma)/2; |
| rect.outset(SkIntToScalar(pad), SkIntToScalar(pad)); |
| } else { |
| return false; |
| } |
| |
| if (!fp) { |
| return false; |
| } |
| |
| grp->addCoverageFragmentProcessor(std::move(fp)); |
| |
| SkMatrix inverse; |
| if (!viewMatrix.invert(&inverse)) { |
| return false; |
| } |
| |
| drawContext->fillRectWithLocalMatrix(clip, *grp, SkMatrix::I(), rect, inverse); |
| return true; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| class GrRRectBlurEffect : public GrFragmentProcessor { |
| public: |
| |
| static sk_sp<GrFragmentProcessor> Make(GrTextureProvider*, float sigma, const SkRRect&); |
| |
| virtual ~GrRRectBlurEffect() {}; |
| const char* name() const override { return "GrRRectBlur"; } |
| |
| const SkRRect& getRRect() const { return fRRect; } |
| float getSigma() const { return fSigma; } |
| |
| private: |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; |
| |
| GrRRectBlurEffect(float sigma, const SkRRect&, GrTexture* profileTexture); |
| |
| virtual void onGetGLSLProcessorKey(const GrGLSLCaps& caps, |
| GrProcessorKeyBuilder* b) const override; |
| |
| bool onIsEqual(const GrFragmentProcessor& other) const override; |
| |
| void onComputeInvariantOutput(GrInvariantOutput* inout) const override; |
| |
| SkRRect fRRect; |
| float fSigma; |
| GrTextureAccess fNinePatchAccess; |
| |
| GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| |
| |
| sk_sp<GrFragmentProcessor> GrRRectBlurEffect::Make(GrTextureProvider* texProvider, float sigma, |
| const SkRRect& rrect) { |
| if (rrect.isCircle()) { |
| return GrCircleBlurFragmentProcessor::Make(texProvider, rrect.rect(), sigma); |
| } |
| |
| if (!rrect.isSimpleCircular()) { |
| return nullptr; |
| } |
| |
| // Make sure we can successfully ninepatch this rrect -- the blur sigma has to be |
| // sufficiently small relative to both the size of the corner radius and the |
| // width (and height) of the rrect. |
| |
| unsigned int blurRadius = 3*SkScalarCeilToInt(sigma-1/6.0f); |
| unsigned int cornerRadius = SkScalarCeilToInt(rrect.getSimpleRadii().x()); |
| if (cornerRadius + blurRadius > rrect.width()/2 || |
| cornerRadius + blurRadius > rrect.height()/2) { |
| return nullptr; |
| } |
| |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey key; |
| GrUniqueKey::Builder builder(&key, kDomain, 2); |
| builder[0] = blurRadius; |
| builder[1] = cornerRadius; |
| builder.finish(); |
| |
| SkAutoTUnref<GrTexture> blurNinePatchTexture(texProvider->findAndRefTextureByUniqueKey(key)); |
| |
| if (!blurNinePatchTexture) { |
| SkMask mask; |
| |
| unsigned int smallRectSide = 2*(blurRadius + cornerRadius) + 1; |
| |
| mask.fBounds = SkIRect::MakeWH(smallRectSide, smallRectSide); |
| mask.fFormat = SkMask::kA8_Format; |
| mask.fRowBytes = mask.fBounds.width(); |
| mask.fImage = SkMask::AllocImage(mask.computeTotalImageSize()); |
| SkAutoMaskFreeImage amfi(mask.fImage); |
| |
| memset(mask.fImage, 0, mask.computeTotalImageSize()); |
| |
| SkRect smallRect; |
| smallRect.setWH(SkIntToScalar(smallRectSide), SkIntToScalar(smallRectSide)); |
| |
| SkRRect smallRRect; |
| smallRRect.setRectXY(smallRect, SkIntToScalar(cornerRadius), SkIntToScalar(cornerRadius)); |
| |
| SkPath path; |
| path.addRRect(smallRRect); |
| |
| SkDraw::DrawToMask(path, &mask.fBounds, nullptr, nullptr, &mask, |
| SkMask::kJustRenderImage_CreateMode, SkStrokeRec::kFill_InitStyle); |
| |
| SkMask blurredMask; |
| if (!SkBlurMask::BoxBlur(&blurredMask, mask, sigma, kNormal_SkBlurStyle, |
| kHigh_SkBlurQuality, nullptr, true)) { |
| return nullptr; |
| } |
| |
| unsigned int texSide = smallRectSide + 2*blurRadius; |
| GrSurfaceDesc texDesc; |
| texDesc.fWidth = texSide; |
| texDesc.fHeight = texSide; |
| texDesc.fConfig = kAlpha_8_GrPixelConfig; |
| texDesc.fIsMipMapped = false; |
| |
| blurNinePatchTexture.reset( |
| texProvider->createTexture(texDesc, SkBudgeted::kYes , blurredMask.fImage, 0)); |
| SkMask::FreeImage(blurredMask.fImage); |
| if (!blurNinePatchTexture) { |
| return nullptr; |
| } |
| texProvider->assignUniqueKeyToTexture(key, blurNinePatchTexture); |
| } |
| return sk_sp<GrFragmentProcessor>(new GrRRectBlurEffect(sigma, rrect, blurNinePatchTexture)); |
| } |
| |
| void GrRRectBlurEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const { |
| inout->mulByUnknownSingleComponent(); |
| } |
| |
| GrRRectBlurEffect::GrRRectBlurEffect(float sigma, const SkRRect& rrect, GrTexture *ninePatchTexture) |
| : fRRect(rrect), |
| fSigma(sigma), |
| fNinePatchAccess(ninePatchTexture) { |
| this->initClassID<GrRRectBlurEffect>(); |
| this->addTextureAccess(&fNinePatchAccess); |
| this->setWillReadFragmentPosition(); |
| } |
| |
| bool GrRRectBlurEffect::onIsEqual(const GrFragmentProcessor& other) const { |
| const GrRRectBlurEffect& rrbe = other.cast<GrRRectBlurEffect>(); |
| return fRRect.getSimpleRadii().fX == rrbe.fRRect.getSimpleRadii().fX && |
| fSigma == rrbe.fSigma && |
| fRRect.rect() == rrbe.fRRect.rect(); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRRectBlurEffect); |
| |
| sk_sp<GrFragmentProcessor> GrRRectBlurEffect::TestCreate(GrProcessorTestData* d) { |
| SkScalar w = d->fRandom->nextRangeScalar(100.f, 1000.f); |
| SkScalar h = d->fRandom->nextRangeScalar(100.f, 1000.f); |
| SkScalar r = d->fRandom->nextRangeF(1.f, 9.f); |
| SkScalar sigma = d->fRandom->nextRangeF(1.f,10.f); |
| SkRRect rrect; |
| rrect.setRectXY(SkRect::MakeWH(w, h), r, r); |
| return GrRRectBlurEffect::Make(d->fContext->textureProvider(), sigma, rrect); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLRRectBlurEffect : public GrGLSLFragmentProcessor { |
| public: |
| void emitCode(EmitArgs&) override; |
| |
| protected: |
| void onSetData(const GrGLSLProgramDataManager&, const GrProcessor&) override; |
| |
| private: |
| GrGLSLProgramDataManager::UniformHandle fProxyRectUniform; |
| GrGLSLProgramDataManager::UniformHandle fCornerRadiusUniform; |
| GrGLSLProgramDataManager::UniformHandle fBlurRadiusUniform; |
| typedef GrGLSLFragmentProcessor INHERITED; |
| }; |
| |
| void GrGLRRectBlurEffect::emitCode(EmitArgs& args) { |
| const char *rectName; |
| const char *cornerRadiusName; |
| const char *blurRadiusName; |
| |
| GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; |
| // The proxy rect has left, top, right, and bottom edges correspond to |
| // components x, y, z, and w, respectively. |
| |
| fProxyRectUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kVec4f_GrSLType, |
| kDefault_GrSLPrecision, |
| "proxyRect", |
| &rectName); |
| fCornerRadiusUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kFloat_GrSLType, |
| kDefault_GrSLPrecision, |
| "cornerRadius", |
| &cornerRadiusName); |
| fBlurRadiusUniform = uniformHandler->addUniform(kFragment_GrShaderFlag, |
| kFloat_GrSLType, |
| kDefault_GrSLPrecision, |
| "blurRadius", |
| &blurRadiusName); |
| |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| const char* fragmentPos = fragBuilder->fragmentPosition(); |
| |
| // warp the fragment position to the appropriate part of the 9patch blur texture |
| |
| fragBuilder->codeAppendf("vec2 rectCenter = (%s.xy + %s.zw)/2.0;", rectName, rectName); |
| fragBuilder->codeAppendf("vec2 translatedFragPos = %s.xy - %s.xy;", fragmentPos, rectName); |
| fragBuilder->codeAppendf("float threshold = %s + 2.0*%s;", cornerRadiusName, blurRadiusName); |
| fragBuilder->codeAppendf("vec2 middle = %s.zw - %s.xy - 2.0*threshold;", rectName, rectName); |
| |
| fragBuilder->codeAppendf( |
| "if (translatedFragPos.x >= threshold && translatedFragPos.x < (middle.x+threshold)) {"); |
| fragBuilder->codeAppendf("translatedFragPos.x = threshold;\n"); |
| fragBuilder->codeAppendf("} else if (translatedFragPos.x >= (middle.x + threshold)) {"); |
| fragBuilder->codeAppendf("translatedFragPos.x -= middle.x - 1.0;"); |
| fragBuilder->codeAppendf("}"); |
| |
| fragBuilder->codeAppendf( |
| "if (translatedFragPos.y > threshold && translatedFragPos.y < (middle.y+threshold)) {"); |
| fragBuilder->codeAppendf("translatedFragPos.y = threshold;"); |
| fragBuilder->codeAppendf("} else if (translatedFragPos.y >= (middle.y + threshold)) {"); |
| fragBuilder->codeAppendf("translatedFragPos.y -= middle.y - 1.0;"); |
| fragBuilder->codeAppendf("}"); |
| |
| fragBuilder->codeAppendf("vec2 proxyDims = vec2(2.0*threshold+1.0);"); |
| fragBuilder->codeAppendf("vec2 texCoord = translatedFragPos / proxyDims;"); |
| |
| fragBuilder->codeAppendf("%s = ", args.fOutputColor); |
| fragBuilder->appendTextureLookupAndModulate(args.fInputColor, args.fTexSamplers[0], "texCoord"); |
| fragBuilder->codeAppend(";"); |
| } |
| |
| void GrGLRRectBlurEffect::onSetData(const GrGLSLProgramDataManager& pdman, |
| const GrProcessor& proc) { |
| const GrRRectBlurEffect& brre = proc.cast<GrRRectBlurEffect>(); |
| const SkRRect& rrect = brre.getRRect(); |
| |
| float blurRadius = 3.f*SkScalarCeilToScalar(brre.getSigma()-1/6.0f); |
| pdman.set1f(fBlurRadiusUniform, blurRadius); |
| |
| SkRect rect = rrect.getBounds(); |
| rect.outset(blurRadius, blurRadius); |
| pdman.set4f(fProxyRectUniform, rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); |
| |
| SkScalar radius = 0; |
| SkASSERT(rrect.isSimpleCircular() || rrect.isRect()); |
| radius = rrect.getSimpleRadii().fX; |
| pdman.set1f(fCornerRadiusUniform, radius); |
| } |
| |
| void GrRRectBlurEffect::onGetGLSLProcessorKey(const GrGLSLCaps& caps, |
| GrProcessorKeyBuilder* b) const { |
| GrGLRRectBlurEffect::GenKey(*this, caps, b); |
| } |
| |
| GrGLSLFragmentProcessor* GrRRectBlurEffect::onCreateGLSLInstance() const { |
| return new GrGLRRectBlurEffect; |
| } |
| |
| bool SkBlurMaskFilterImpl::directFilterRRectMaskGPU(GrTextureProvider* texProvider, |
| GrDrawContext* drawContext, |
| GrPaint* grp, |
| const GrClip& clip, |
| const SkMatrix& viewMatrix, |
| const SkStrokeRec& strokeRec, |
| const SkRRect& rrect) const { |
| SkASSERT(drawContext); |
| |
| if (fBlurStyle != kNormal_SkBlurStyle) { |
| return false; |
| } |
| |
| if (!strokeRec.isFillStyle()) { |
| return false; |
| } |
| |
| SkScalar xformedSigma = this->computeXformedSigma(viewMatrix); |
| float extra=3.f*SkScalarCeilToScalar(xformedSigma-1/6.0f); |
| |
| SkRect proxyRect = rrect.rect(); |
| proxyRect.outset(extra, extra); |
| |
| sk_sp<GrFragmentProcessor> fp(GrRRectBlurEffect::Make(texProvider, xformedSigma, rrect)); |
| if (!fp) { |
| return false; |
| } |
| |
| grp->addCoverageFragmentProcessor(std::move(fp)); |
| |
| SkMatrix inverse; |
| if (!viewMatrix.invert(&inverse)) { |
| return false; |
| } |
| |
| drawContext->fillRectWithLocalMatrix(clip, *grp, SkMatrix::I(), proxyRect, inverse); |
| return true; |
| } |
| |
| bool SkBlurMaskFilterImpl::canFilterMaskGPU(const SkRRect& devRRect, |
| const SkIRect& clipBounds, |
| const SkMatrix& ctm, |
| SkRect* maskRect) const { |
| SkScalar xformedSigma = this->computeXformedSigma(ctm); |
| if (xformedSigma <= 0) { |
| return false; |
| } |
| |
| // We always do circles on the GPU |
| if (!devRRect.isCircle()) { |
| static const SkScalar kMIN_GPU_BLUR_SIZE = SkIntToScalar(64); |
| static const SkScalar kMIN_GPU_BLUR_SIGMA = SkIntToScalar(32); |
| |
| if (devRRect.width() <= kMIN_GPU_BLUR_SIZE && |
| devRRect.height() <= kMIN_GPU_BLUR_SIZE && |
| xformedSigma <= kMIN_GPU_BLUR_SIGMA) { |
| // We prefer to blur small rects with small radii on the CPU. |
| return false; |
| } |
| } |
| |
| if (nullptr == maskRect) { |
| // don't need to compute maskRect |
| return true; |
| } |
| |
| float sigma3 = 3 * SkScalarToFloat(xformedSigma); |
| |
| SkRect clipRect = SkRect::Make(clipBounds); |
| SkRect srcRect(devRRect.rect()); |
| |
| // Outset srcRect and clipRect by 3 * sigma, to compute affected blur area. |
| srcRect.outset(sigma3, sigma3); |
| clipRect.outset(sigma3, sigma3); |
| if (!srcRect.intersect(clipRect)) { |
| srcRect.setEmpty(); |
| } |
| *maskRect = srcRect; |
| return true; |
| } |
| |
| bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src, |
| const SkMatrix& ctm, |
| const SkIRect& maskRect, |
| GrTexture** result) const { |
| // 'maskRect' isn't snapped to the UL corner but the mask in 'src' is. |
| const SkIRect clipRect = SkIRect::MakeWH(maskRect.width(), maskRect.height()); |
| |
| GrContext* context = src->getContext(); |
| |
| SkScalar xformedSigma = this->computeXformedSigma(ctm); |
| SkASSERT(xformedSigma > 0); |
| |
| // If we're doing a normal blur, we can clobber the pathTexture in the |
| // gaussianBlur. Otherwise, we need to save it for later compositing. |
| static const bool kIsGammaCorrect = false; |
| bool isNormalBlur = (kNormal_SkBlurStyle == fBlurStyle); |
| sk_sp<GrDrawContext> drawContext(SkGpuBlurUtils::GaussianBlur(context, src, |
| kIsGammaCorrect, |
| clipRect, nullptr, |
| xformedSigma, xformedSigma)); |
| if (!drawContext) { |
| return false; |
| } |
| |
| if (!isNormalBlur) { |
| GrPaint paint; |
| SkMatrix matrix; |
| matrix.setIDiv(src->width(), src->height()); |
| // Blend pathTexture over blurTexture. |
| paint.addCoverageFragmentProcessor(GrSimpleTextureEffect::Make(src, matrix)); |
| if (kInner_SkBlurStyle == fBlurStyle) { |
| // inner: dst = dst * src |
| paint.setCoverageSetOpXPFactory(SkRegion::kIntersect_Op); |
| } else if (kSolid_SkBlurStyle == fBlurStyle) { |
| // solid: dst = src + dst - src * dst |
| // = src + (1 - src) * dst |
| paint.setCoverageSetOpXPFactory(SkRegion::kUnion_Op); |
| } else if (kOuter_SkBlurStyle == fBlurStyle) { |
| // outer: dst = dst * (1 - src) |
| // = 0 * src + (1 - src) * dst |
| paint.setCoverageSetOpXPFactory(SkRegion::kDifference_Op); |
| } else { |
| paint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op); |
| } |
| |
| drawContext->drawRect(GrNoClip(), paint, SkMatrix::I(), SkRect::Make(clipRect)); |
| } |
| |
| *result = drawContext->asTexture().release(); |
| return true; |
| } |
| |
| #endif // SK_SUPPORT_GPU |
| |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkBlurMaskFilterImpl::toString(SkString* str) const { |
| str->append("SkBlurMaskFilterImpl: ("); |
| |
| str->append("sigma: "); |
| str->appendScalar(fSigma); |
| str->append(" "); |
| |
| static const char* gStyleName[kLastEnum_SkBlurStyle + 1] = { |
| "normal", "solid", "outer", "inner" |
| }; |
| |
| str->appendf("style: %s ", gStyleName[fBlurStyle]); |
| str->append("flags: ("); |
| if (fBlurFlags) { |
| bool needSeparator = false; |
| SkAddFlagToString(str, |
| SkToBool(fBlurFlags & SkBlurMaskFilter::kIgnoreTransform_BlurFlag), |
| "IgnoreXform", &needSeparator); |
| SkAddFlagToString(str, |
| SkToBool(fBlurFlags & SkBlurMaskFilter::kHighQuality_BlurFlag), |
| "HighQuality", &needSeparator); |
| } else { |
| str->append("None"); |
| } |
| str->append("))"); |
| } |
| #endif |
| |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
