| |
| /* |
| * 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 "GrContext.h" |
| #include "GrTexture.h" |
| #include "GrEffect.h" |
| #include "gl/GrGLEffect.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "GrTBackendEffectFactory.h" |
| #include "SkGrPixelRef.h" |
| #include "SkDraw.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 |
| virtual SkMask::Format getFormat() const SK_OVERRIDE; |
| virtual bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&, |
| SkIPoint* margin) const SK_OVERRIDE; |
| |
| #if SK_SUPPORT_GPU |
| virtual bool canFilterMaskGPU(const SkRect& devBounds, |
| const SkIRect& clipBounds, |
| const SkMatrix& ctm, |
| SkRect* maskRect) const SK_OVERRIDE; |
| virtual bool directFilterMaskGPU(GrContext* context, |
| GrPaint* grp, |
| const SkStrokeRec& strokeRec, |
| const SkPath& path) const SK_OVERRIDE; |
| virtual bool directFilterRRectMaskGPU(GrContext* context, |
| GrPaint* grp, |
| const SkStrokeRec& strokeRec, |
| const SkRRect& rrect) const SK_OVERRIDE; |
| |
| virtual bool filterMaskGPU(GrTexture* src, |
| const SkMatrix& ctm, |
| const SkRect& maskRect, |
| GrTexture** result, |
| bool canOverwriteSrc) const SK_OVERRIDE; |
| #endif |
| |
| virtual void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE; |
| virtual bool asABlur(BlurRec*) const SK_OVERRIDE; |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurMaskFilterImpl) |
| |
| protected: |
| virtual FilterReturn filterRectsToNine(const SkRect[], int count, const SkMatrix&, |
| const SkIRect& clipBounds, |
| NinePatch*) const SK_OVERRIDE; |
| |
| virtual FilterReturn filterRRectToNine(const SkRRect&, const SkMatrix&, |
| const SkIRect& clipBounds, |
| NinePatch*) const SK_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&); |
| virtual void flatten(SkWriteBuffer&) const SK_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); |
| } |
| |
| typedef SkMaskFilter INHERITED; |
| }; |
| |
| const SkScalar SkBlurMaskFilterImpl::kMAX_BLUR_SIGMA = SkIntToScalar(128); |
| |
| SkMaskFilter* SkBlurMaskFilter::Create(SkBlurStyle style, SkScalar sigma, uint32_t flags) { |
| if (!SkScalarIsFinite(sigma) || sigma <= 0) { |
| return NULL; |
| } |
| if ((unsigned)style > (unsigned)kLastEnum_SkBlurStyle) { |
| return NULL; |
| } |
| if (flags > SkBlurMaskFilter::kAll_BlurFlag) { |
| return NULL; |
| } |
| return SkNEW_ARGS(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 != NULL); |
| |
| bounds.roundOut(&mask->fBounds); |
| mask->fRowBytes = SkAlign4(mask->fBounds.width()); |
| mask->fFormat = SkMask::kA8_Format; |
| const size_t size = mask->computeImageSize(); |
| mask->fImage = SkMask::AllocImage(size); |
| if (NULL == 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; |
| } |
| |
| #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 != NULL); |
| switch (rrect.getType()) { |
| case SkRRect::kUnknown_Type: |
| // Unknown should never be returned. |
| SkASSERT(false); |
| // Fall through. |
| 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; |
| rrect.rect().roundOut(&srcM.fBounds); |
| srcM.fImage = NULL; |
| 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); |
| |
| 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; |
| } |
| } |
| |
| patch->fMask.fBounds.offsetTo(0, 0); |
| patch->fOuterRect = dstM.fBounds; |
| patch->fCenter.fX = SkScalarCeilToInt(leftUnstretched) + 1; |
| patch->fCenter.fY = SkScalarCeilToInt(topUnstretched) + 1; |
| 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; |
| rects[0].roundOut(&srcM.fBounds); |
| srcM.fImage = NULL; |
| 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()); |
| } |
| |
| 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; |
| } |
| } |
| patch->fMask.fBounds.offsetTo(0, 0); |
| patch->fOuterRect = dstM.fBounds; |
| patch->fCenter = center; |
| 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); |
| } |
| |
| SkBlurMaskFilterImpl::SkBlurMaskFilterImpl(SkReadBuffer& buffer) |
| : SkMaskFilter(buffer) { |
| fSigma = buffer.readScalar(); |
| fBlurStyle = (SkBlurStyle)buffer.readInt(); |
| fBlurFlags = buffer.readUInt() & SkBlurMaskFilter::kAll_BlurFlag; |
| SkASSERT(fSigma > 0); |
| SkASSERT((unsigned)fBlurStyle <= kLastEnum_SkBlurStyle); |
| } |
| |
| void SkBlurMaskFilterImpl::flatten(SkWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeScalar(fSigma); |
| buffer.writeInt(fBlurStyle); |
| buffer.writeUInt(fBlurFlags); |
| } |
| |
| #if SK_SUPPORT_GPU |
| |
| class GrGLRectBlurEffect; |
| |
| class GrRectBlurEffect : public GrEffect { |
| public: |
| virtual ~GrRectBlurEffect(); |
| |
| static const char* Name() { return "RectBlur"; } |
| |
| typedef GrGLRectBlurEffect GLEffect; |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; |
| |
| /** |
| * Create a simple filter effect with custom bicubic coefficients. |
| */ |
| static GrEffectRef* Create(GrContext *context, const SkRect& rect, |
| float sigma) { |
| GrTexture *blurProfileTexture = NULL; |
| 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 NULL; |
| } |
| |
| bool createdBlurProfileTexture = CreateBlurProfileTexture(context, sigma, &blurProfileTexture); |
| SkAutoTUnref<GrTexture> hunref(blurProfileTexture); |
| if (!createdBlurProfileTexture) { |
| return NULL; |
| } |
| AutoEffectUnref effect(SkNEW_ARGS(GrRectBlurEffect, (rect, sigma, blurProfileTexture))); |
| return CreateEffectRef(effect); |
| } |
| |
| const SkRect& getRect() const { return fRect; } |
| float getSigma() const { return fSigma; } |
| |
| private: |
| GrRectBlurEffect(const SkRect& rect, float sigma, GrTexture *blur_profile); |
| virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; |
| |
| static bool CreateBlurProfileTexture(GrContext *context, float sigma, |
| GrTexture **blurProfileTexture); |
| |
| SkRect fRect; |
| float fSigma; |
| GrTextureAccess fBlurProfileAccess; |
| |
| GR_DECLARE_EFFECT_TEST; |
| |
| typedef GrEffect INHERITED; |
| }; |
| |
| class GrGLRectBlurEffect : public GrGLEffect { |
| public: |
| GrGLRectBlurEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect&); |
| virtual void emitCode(GrGLShaderBuilder*, |
| const GrDrawEffect&, |
| EffectKey, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray&, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
| |
| private: |
| typedef GrGLUniformManager::UniformHandle UniformHandle; |
| |
| UniformHandle fProxyRectUniform; |
| UniformHandle fProfileSizeUniform; |
| |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| |
| |
| GrGLRectBlurEffect::GrGLRectBlurEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&) |
| : INHERITED(factory) { |
| } |
| |
| void OutputRectBlurProfileLookup(GrGLShaderBuilder* builder, |
| const GrGLShaderBuilder::TextureSampler& sampler, |
| const char *output, |
| const char *profileSize, const char *loc, |
| const char *blurred_width, |
| const char *sharp_width) { |
| builder->fsCodeAppendf("\tfloat %s;\n", output); |
| builder->fsCodeAppendf("\t\t{\n"); |
| builder->fsCodeAppendf("\t\t\tfloat coord = (0.5 * (abs(2.0*%s - %s) - %s))/%s;\n", |
| loc, blurred_width, sharp_width, profileSize); |
| builder->fsCodeAppendf("\t\t\t%s = ", output); |
| builder->fsAppendTextureLookup(sampler, "vec2(coord,0.5)"); |
| builder->fsCodeAppend(".a;\n"); |
| builder->fsCodeAppendf("\t\t}\n"); |
| } |
| |
| void GrGLRectBlurEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect&, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray& coords, |
| const TextureSamplerArray& samplers) { |
| |
| const char *rectName; |
| const char *profileSizeName; |
| |
| fProxyRectUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec4f_GrSLType, |
| "proxyRect", |
| &rectName); |
| fProfileSizeUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, |
| "profileSize", |
| &profileSizeName); |
| |
| const char *fragmentPos = builder->fragmentPosition(); |
| |
| if (inputColor) { |
| builder->fsCodeAppendf("\tvec4 src=%s;\n", inputColor); |
| } else { |
| builder->fsCodeAppendf("\tvec4 src=vec4(1)\n;"); |
| } |
| |
| builder->fsCodeAppendf("\tvec2 translatedPos = %s.xy - %s.xy;\n", fragmentPos, rectName ); |
| builder->fsCodeAppendf("\tfloat width = %s.z - %s.x;\n", rectName, rectName); |
| builder->fsCodeAppendf("\tfloat height = %s.w - %s.y;\n", rectName, rectName); |
| |
| builder->fsCodeAppendf("\tvec2 smallDims = vec2(width - %s, height-%s);\n", profileSizeName, profileSizeName); |
| builder->fsCodeAppendf("\tfloat center = 2.0 * floor(%s/2.0 + .25) - 1.0;\n", profileSizeName); |
| builder->fsCodeAppendf("\tvec2 wh = smallDims - vec2(center,center);\n"); |
| |
| OutputRectBlurProfileLookup(builder, samplers[0], "horiz_lookup", profileSizeName, "translatedPos.x", "width", "wh.x"); |
| OutputRectBlurProfileLookup(builder, samplers[0], "vert_lookup", profileSizeName, "translatedPos.y", "height", "wh.y"); |
| |
| builder->fsCodeAppendf("\tfloat final = horiz_lookup * vert_lookup;\n"); |
| builder->fsCodeAppendf("\t%s = src * vec4(final);\n", outputColor ); |
| } |
| |
| void GrGLRectBlurEffect::setData(const GrGLUniformManager& uman, |
| const GrDrawEffect& drawEffect) { |
| const GrRectBlurEffect& rbe = drawEffect.castEffect<GrRectBlurEffect>(); |
| SkRect rect = rbe.getRect(); |
| |
| uman.set4f(fProxyRectUniform, rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); |
| uman.set1f(fProfileSizeUniform, SkScalarCeilToScalar(6*rbe.getSigma())); |
| } |
| |
| bool GrRectBlurEffect::CreateBlurProfileTexture(GrContext *context, float sigma, |
| GrTexture **blurProfileTexture) { |
| GrTextureParams params; |
| GrTextureDesc texDesc; |
| |
| unsigned int profile_size = SkScalarCeilToInt(6*sigma); |
| |
| texDesc.fWidth = profile_size; |
| texDesc.fHeight = 1; |
| texDesc.fConfig = kAlpha_8_GrPixelConfig; |
| |
| static const GrCacheID::Domain gBlurProfileDomain = GrCacheID::GenerateDomain(); |
| GrCacheID::Key key; |
| memset(&key, 0, sizeof(key)); |
| key.fData32[0] = profile_size; |
| key.fData32[1] = 1; |
| GrCacheID blurProfileKey(gBlurProfileDomain, key); |
| |
| uint8_t *profile = NULL; |
| SkAutoTDeleteArray<uint8_t> ada(NULL); |
| |
| *blurProfileTexture = context->findAndRefTexture(texDesc, blurProfileKey, ¶ms); |
| |
| if (NULL == *blurProfileTexture) { |
| |
| SkBlurMask::ComputeBlurProfile(sigma, &profile); |
| ada.reset(profile); |
| |
| *blurProfileTexture = context->createTexture(¶ms, texDesc, blurProfileKey, |
| profile, 0); |
| |
| if (NULL == *blurProfileTexture) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| GrRectBlurEffect::GrRectBlurEffect(const SkRect& rect, float sigma, |
| GrTexture *blur_profile) |
| : INHERITED(), |
| fRect(rect), |
| fSigma(sigma), |
| fBlurProfileAccess(blur_profile) { |
| this->addTextureAccess(&fBlurProfileAccess); |
| this->setWillReadFragmentPosition(); |
| } |
| |
| GrRectBlurEffect::~GrRectBlurEffect() { |
| } |
| |
| const GrBackendEffectFactory& GrRectBlurEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrRectBlurEffect>::getInstance(); |
| } |
| |
| bool GrRectBlurEffect::onIsEqual(const GrEffect& sBase) const { |
| const GrRectBlurEffect& s = CastEffect<GrRectBlurEffect>(sBase); |
| return this->getSigma() == s.getSigma() && this->getRect() == s.getRect(); |
| } |
| |
| void GrRectBlurEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const { |
| *validFlags = 0; |
| return; |
| } |
| |
| GR_DEFINE_EFFECT_TEST(GrRectBlurEffect); |
| |
| GrEffectRef* GrRectBlurEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| const GrDrawTargetCaps&, |
| GrTexture**) { |
| float sigma = random->nextRangeF(3,8); |
| float width = random->nextRangeF(200,300); |
| float height = random->nextRangeF(200,300); |
| return GrRectBlurEffect::Create(context, SkRect::MakeWH(width, height), sigma); |
| } |
| |
| |
| bool SkBlurMaskFilterImpl::directFilterMaskGPU(GrContext* context, |
| GrPaint* grp, |
| const SkStrokeRec& strokeRec, |
| const SkPath& path) const { |
| if (fBlurStyle != kNormal_SkBlurStyle) { |
| return false; |
| } |
| |
| SkRect rect; |
| if (!path.isRect(&rect)) { |
| return false; |
| } |
| |
| if (!strokeRec.isFillStyle()) { |
| return false; |
| } |
| |
| SkMatrix ctm = context->getMatrix(); |
| SkScalar xformedSigma = this->computeXformedSigma(ctm); |
| |
| int pad=SkScalarCeilToInt(6*xformedSigma)/2; |
| rect.outset(SkIntToScalar(pad), SkIntToScalar(pad)); |
| |
| SkAutoTUnref<GrEffectRef> effect(GrRectBlurEffect::Create( |
| context, rect, xformedSigma)); |
| if (!effect) { |
| return false; |
| } |
| |
| GrContext::AutoMatrix am; |
| if (!am.setIdentity(context, grp)) { |
| return false; |
| } |
| |
| grp->addCoverageEffect(effect); |
| |
| context->drawRect(*grp, rect); |
| return true; |
| } |
| |
| class GrGLRRectBlurEffect; |
| |
| class GrRRectBlurEffect : public GrEffect { |
| public: |
| |
| static GrEffectRef* Create(GrContext* context, float sigma, const SkRRect&); |
| |
| virtual ~GrRRectBlurEffect() {}; |
| static const char* Name() { return "GrRRectBlur"; } |
| |
| const SkRRect& getRRect() const { return fRRect; } |
| float getSigma() const { return fSigma; } |
| |
| typedef GrGLRRectBlurEffect GLEffect; |
| |
| virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| |
| private: |
| GrRRectBlurEffect(float sigma, const SkRRect&, GrTexture* profileTexture); |
| |
| virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE; |
| |
| SkRRect fRRect; |
| float fSigma; |
| GrTextureAccess fNinePatchAccess; |
| |
| GR_DECLARE_EFFECT_TEST; |
| |
| typedef GrEffect INHERITED; |
| }; |
| |
| |
| GrEffectRef* GrRRectBlurEffect::Create(GrContext* context, float sigma, const SkRRect& rrect) { |
| if (!rrect.isSimpleCircular()) { |
| return NULL; |
| } |
| |
| // 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 NULL; |
| } |
| |
| static const GrCacheID::Domain gRRectBlurDomain = GrCacheID::GenerateDomain(); |
| GrCacheID::Key key; |
| memset(&key, 0, sizeof(key)); |
| key.fData32[0] = blurRadius; |
| key.fData32[1] = cornerRadius; |
| GrCacheID blurRRectNinePatchID(gRRectBlurDomain, key); |
| |
| GrTextureParams params; |
| params.setFilterMode(GrTextureParams::kBilerp_FilterMode); |
| |
| unsigned int smallRectSide = 2*(blurRadius + cornerRadius) + 1; |
| unsigned int texSide = smallRectSide + 2*blurRadius; |
| GrTextureDesc texDesc; |
| texDesc.fWidth = texSide; |
| texDesc.fHeight = texSide; |
| texDesc.fConfig = kAlpha_8_GrPixelConfig; |
| |
| GrTexture *blurNinePatchTexture = context->findAndRefTexture(texDesc, blurRRectNinePatchID, ¶ms); |
| |
| if (NULL == blurNinePatchTexture) { |
| SkMask mask; |
| |
| 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, NULL, NULL, &mask, SkMask::kJustRenderImage_CreateMode, SkPaint::kFill_Style); |
| |
| SkMask blurred_mask; |
| SkBlurMask::BoxBlur(&blurred_mask, mask, sigma, kNormal_SkBlurStyle, kHigh_SkBlurQuality, NULL, true ); |
| |
| blurNinePatchTexture = context->createTexture(¶ms, texDesc, blurRRectNinePatchID, blurred_mask.fImage, 0); |
| SkMask::FreeImage(blurred_mask.fImage); |
| } |
| |
| SkAutoTUnref<GrTexture> blurunref(blurNinePatchTexture); |
| if (NULL == blurNinePatchTexture) { |
| return NULL; |
| } |
| |
| return CreateEffectRef(AutoEffectUnref(SkNEW_ARGS(GrRRectBlurEffect, |
| (sigma, rrect, blurNinePatchTexture)))); |
| } |
| |
| void GrRRectBlurEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const { |
| *validFlags = 0; |
| } |
| |
| const GrBackendEffectFactory& GrRRectBlurEffect::getFactory() const { |
| return GrTBackendEffectFactory<GrRRectBlurEffect>::getInstance(); |
| } |
| |
| GrRRectBlurEffect::GrRRectBlurEffect(float sigma, const SkRRect& rrect, GrTexture *ninePatchTexture) |
| : fRRect(rrect), |
| fSigma(sigma), |
| fNinePatchAccess(ninePatchTexture) { |
| this->addTextureAccess(&fNinePatchAccess); |
| this->setWillReadFragmentPosition(); |
| } |
| |
| bool GrRRectBlurEffect::onIsEqual(const GrEffect& other) const { |
| const GrRRectBlurEffect& rrbe = CastEffect<GrRRectBlurEffect>(other); |
| return fRRect.getSimpleRadii().fX == rrbe.fRRect.getSimpleRadii().fX && fSigma == rrbe.fSigma; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GR_DEFINE_EFFECT_TEST(GrRRectBlurEffect); |
| |
| GrEffectRef* GrRRectBlurEffect::TestCreate(SkRandom* random, |
| GrContext* context, |
| const GrDrawTargetCaps& caps, |
| GrTexture*[]) { |
| SkScalar w = random->nextRangeScalar(100.f, 1000.f); |
| SkScalar h = random->nextRangeScalar(100.f, 1000.f); |
| SkScalar r = random->nextRangeF(1.f, 9.f); |
| SkScalar sigma = random->nextRangeF(1.f,10.f); |
| SkRRect rrect; |
| rrect.setRectXY(SkRect::MakeWH(w, h), r, r); |
| return GrRRectBlurEffect::Create(context, sigma, rrect); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| class GrGLRRectBlurEffect : public GrGLEffect { |
| public: |
| GrGLRRectBlurEffect(const GrBackendEffectFactory&, const GrDrawEffect&); |
| |
| virtual void emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray&, |
| const TextureSamplerArray&) SK_OVERRIDE; |
| |
| virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE; |
| |
| private: |
| GrGLUniformManager::UniformHandle fProxyRectUniform; |
| GrGLUniformManager::UniformHandle fCornerRadiusUniform; |
| GrGLUniformManager::UniformHandle fBlurRadiusUniform; |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| GrGLRRectBlurEffect::GrGLRRectBlurEffect(const GrBackendEffectFactory& factory, |
| const GrDrawEffect& drawEffect) |
| : INHERITED (factory) { |
| } |
| |
| void GrGLRRectBlurEffect::emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray&, |
| const TextureSamplerArray& samplers) { |
| const char *rectName; |
| const char *cornerRadiusName; |
| const char *blurRadiusName; |
| |
| // The proxy rect has left, top, right, and bottom edges correspond to |
| // components x, y, z, and w, respectively. |
| |
| fProxyRectUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kVec4f_GrSLType, |
| "proxyRect", |
| &rectName); |
| fCornerRadiusUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, |
| "cornerRadius", |
| &cornerRadiusName); |
| fBlurRadiusUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility, |
| kFloat_GrSLType, |
| "blurRadius", |
| &blurRadiusName); |
| const char* fragmentPos = builder->fragmentPosition(); |
| |
| // warp the fragment position to the appropriate part of the 9patch blur texture |
| |
| builder->fsCodeAppendf("\t\tvec2 rectCenter = (%s.xy + %s.zw)/2.0;\n", rectName, rectName); |
| builder->fsCodeAppendf("\t\tvec2 translatedFragPos = %s.xy - %s.xy;\n", fragmentPos, rectName); |
| builder->fsCodeAppendf("\t\tfloat threshold = %s + 2.0*%s;\n", cornerRadiusName, blurRadiusName ); |
| builder->fsCodeAppendf("\t\tvec2 middle = %s.zw - %s.xy - 2.0*threshold;\n", rectName, rectName ); |
| |
| builder->fsCodeAppendf("\t\tif (translatedFragPos.x >= threshold && translatedFragPos.x < (middle.x+threshold)) {\n" ); |
| builder->fsCodeAppendf("\t\t\ttranslatedFragPos.x = threshold;\n"); |
| builder->fsCodeAppendf("\t\t} else if (translatedFragPos.x >= (middle.x + threshold)) {\n"); |
| builder->fsCodeAppendf("\t\t\ttranslatedFragPos.x -= middle.x - 1.0;\n"); |
| builder->fsCodeAppendf("\t\t}\n"); |
| |
| builder->fsCodeAppendf("\t\tif (translatedFragPos.y > threshold && translatedFragPos.y < (middle.y+threshold)) {\n" ); |
| builder->fsCodeAppendf("\t\t\ttranslatedFragPos.y = threshold;\n"); |
| builder->fsCodeAppendf("\t\t} else if (translatedFragPos.y >= (middle.y + threshold)) {\n"); |
| builder->fsCodeAppendf("\t\t\ttranslatedFragPos.y -= middle.y - 1.0;\n"); |
| builder->fsCodeAppendf("\t\t}\n"); |
| |
| builder->fsCodeAppendf("\t\tvec2 proxyDims = vec2(2.0*threshold+1.0);\n"); |
| builder->fsCodeAppendf("\t\tvec2 texCoord = translatedFragPos / proxyDims;\n"); |
| |
| builder->fsCodeAppendf("\t%s = ", outputColor); |
| builder->fsAppendTextureLookupAndModulate(inputColor, samplers[0], "texCoord"); |
| builder->fsCodeAppend(";\n"); |
| } |
| |
| void GrGLRRectBlurEffect::setData(const GrGLUniformManager& uman, |
| const GrDrawEffect& drawEffect) { |
| const GrRRectBlurEffect& brre = drawEffect.castEffect<GrRRectBlurEffect>(); |
| SkRRect rrect = brre.getRRect(); |
| |
| float blurRadius = 3.f*SkScalarCeilToScalar(brre.getSigma()-1/6.0f); |
| uman.set1f(fBlurRadiusUniform, blurRadius); |
| |
| SkRect rect = rrect.getBounds(); |
| rect.outset(blurRadius, blurRadius); |
| uman.set4f(fProxyRectUniform, rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); |
| |
| SkScalar radius = 0; |
| SkASSERT(rrect.isSimpleCircular() || rrect.isRect()); |
| radius = rrect.getSimpleRadii().fX; |
| uman.set1f(fCornerRadiusUniform, radius); |
| } |
| |
| |
| bool SkBlurMaskFilterImpl::directFilterRRectMaskGPU(GrContext* context, |
| GrPaint* grp, |
| const SkStrokeRec& strokeRec, |
| const SkRRect& rrect) const { |
| if (fBlurStyle != kNormal_SkBlurStyle) { |
| return false; |
| } |
| |
| if (!strokeRec.isFillStyle()) { |
| return false; |
| } |
| |
| SkRect proxy_rect = rrect.rect(); |
| SkMatrix ctm = context->getMatrix(); |
| SkScalar xformedSigma = this->computeXformedSigma(ctm); |
| float extra=3.f*SkScalarCeilToScalar(xformedSigma-1/6.0f); |
| proxy_rect.outset(extra, extra); |
| |
| SkAutoTUnref<GrEffectRef> effect(GrRRectBlurEffect::Create( |
| context, xformedSigma, rrect)); |
| if (!effect) { |
| return false; |
| } |
| |
| GrContext::AutoMatrix am; |
| if (!am.setIdentity(context, grp)) { |
| return false; |
| } |
| |
| grp->addCoverageEffect(effect); |
| |
| context->drawRect(*grp, proxy_rect); |
| return true; |
| } |
| |
| bool SkBlurMaskFilterImpl::canFilterMaskGPU(const SkRect& srcBounds, |
| const SkIRect& clipBounds, |
| const SkMatrix& ctm, |
| SkRect* maskRect) const { |
| SkScalar xformedSigma = this->computeXformedSigma(ctm); |
| if (xformedSigma <= 0) { |
| return false; |
| } |
| |
| static const SkScalar kMIN_GPU_BLUR_SIZE = SkIntToScalar(64); |
| static const SkScalar kMIN_GPU_BLUR_SIGMA = SkIntToScalar(32); |
| |
| if (srcBounds.width() <= kMIN_GPU_BLUR_SIZE && |
| srcBounds.height() <= kMIN_GPU_BLUR_SIZE && |
| xformedSigma <= kMIN_GPU_BLUR_SIGMA) { |
| // We prefer to blur small rect with small radius via CPU. |
| return false; |
| } |
| |
| if (NULL == maskRect) { |
| // don't need to compute maskRect |
| return true; |
| } |
| |
| float sigma3 = 3 * SkScalarToFloat(xformedSigma); |
| |
| SkRect clipRect = SkRect::Make(clipBounds); |
| SkRect srcRect(srcBounds); |
| |
| // Outset srcRect and clipRect by 3 * sigma, to compute affected blur area. |
| srcRect.outset(sigma3, sigma3); |
| clipRect.outset(sigma3, sigma3); |
| srcRect.intersect(clipRect); |
| *maskRect = srcRect; |
| return true; |
| } |
| |
| bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src, |
| const SkMatrix& ctm, |
| const SkRect& maskRect, |
| GrTexture** result, |
| bool canOverwriteSrc) const { |
| SkRect clipRect = SkRect::MakeWH(maskRect.width(), maskRect.height()); |
| |
| GrContext* context = src->getContext(); |
| |
| GrContext::AutoWideOpenIdentityDraw awo(context, NULL); |
| |
| 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. |
| bool isNormalBlur = (kNormal_SkBlurStyle == fBlurStyle); |
| *result = SkGpuBlurUtils::GaussianBlur(context, src, isNormalBlur && canOverwriteSrc, |
| clipRect, false, xformedSigma, xformedSigma); |
| if (NULL == *result) { |
| return false; |
| } |
| |
| if (!isNormalBlur) { |
| context->setIdentityMatrix(); |
| GrPaint paint; |
| SkMatrix matrix; |
| matrix.setIDiv(src->width(), src->height()); |
| // Blend pathTexture over blurTexture. |
| GrContext::AutoRenderTarget art(context, (*result)->asRenderTarget()); |
| paint.addColorEffect(GrSimpleTextureEffect::Create(src, matrix))->unref(); |
| if (kInner_SkBlurStyle == fBlurStyle) { |
| // inner: dst = dst * src |
| paint.setBlendFunc(kDC_GrBlendCoeff, kZero_GrBlendCoeff); |
| } else if (kSolid_SkBlurStyle == fBlurStyle) { |
| // solid: dst = src + dst - src * dst |
| // = (1 - dst) * src + 1 * dst |
| paint.setBlendFunc(kIDC_GrBlendCoeff, kOne_GrBlendCoeff); |
| } else if (kOuter_SkBlurStyle == fBlurStyle) { |
| // outer: dst = dst * (1 - src) |
| // = 0 * src + (1 - src) * dst |
| paint.setBlendFunc(kZero_GrBlendCoeff, kISC_GrBlendCoeff); |
| } |
| context->drawRect(paint, clipRect); |
| } |
| |
| 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 |
