| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/gpu/GrBlurUtils.h" |
| |
| #include "include/gpu/GrRecordingContext.h" |
| #include "src/gpu/GrBitmapTextureMaker.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrFixedClip.h" |
| #include "src/gpu/GrProxyProvider.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrRenderTargetContext.h" |
| #include "src/gpu/GrRenderTargetContextPriv.h" |
| #include "src/gpu/GrSoftwarePathRenderer.h" |
| #include "src/gpu/GrStyle.h" |
| #include "src/gpu/GrTextureProxy.h" |
| #include "src/gpu/GrThreadSafeUniquelyKeyedProxyViewCache.h" |
| #include "src/gpu/effects/GrTextureEffect.h" |
| #include "src/gpu/geometry/GrStyledShape.h" |
| |
| #include "include/core/SkPaint.h" |
| #include "src/core/SkDraw.h" |
| #include "src/core/SkMaskFilterBase.h" |
| #include "src/core/SkMatrixProvider.h" |
| #include "src/core/SkTLazy.h" |
| #include "src/gpu/SkGr.h" |
| |
| static bool clip_bounds_quick_reject(const SkIRect& clipBounds, const SkIRect& rect) { |
| return clipBounds.isEmpty() || rect.isEmpty() || !SkIRect::Intersects(clipBounds, rect); |
| } |
| |
| static constexpr auto kMaskOrigin = kTopLeft_GrSurfaceOrigin; |
| |
| static GrSurfaceProxyView find_filtered_mask(GrProxyProvider* provider, const GrUniqueKey& key) { |
| return provider->findCachedProxyWithColorTypeFallback(key, kMaskOrigin, GrColorType::kAlpha_8, |
| 1); |
| } |
| |
| // Draw a mask using the supplied paint. Since the coverage/geometry |
| // is already burnt into the mask this boils down to a rect draw. |
| // Return true if the mask was successfully drawn. |
| static bool draw_mask(GrRenderTargetContext* renderTargetContext, |
| const GrClip* clip, |
| const SkMatrix& viewMatrix, |
| const SkIRect& maskRect, |
| GrPaint&& paint, |
| GrSurfaceProxyView mask) { |
| SkMatrix inverse; |
| if (!viewMatrix.invert(&inverse)) { |
| return false; |
| } |
| |
| SkMatrix matrix = SkMatrix::Translate(-SkIntToScalar(maskRect.fLeft), |
| -SkIntToScalar(maskRect.fTop)); |
| matrix.preConcat(viewMatrix); |
| paint.setCoverageFragmentProcessor( |
| GrTextureEffect::Make(std::move(mask), kUnknown_SkAlphaType, matrix)); |
| |
| renderTargetContext->fillRectWithLocalMatrix(clip, std::move(paint), GrAA::kNo, SkMatrix::I(), |
| SkRect::Make(maskRect), inverse); |
| return true; |
| } |
| |
| static void mask_release_proc(void* addr, void* /*context*/) { |
| SkMask::FreeImage(addr); |
| } |
| |
| static bool sw_draw_with_mask_filter(GrRecordingContext* rContext, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip* clipData, |
| const SkMatrix& viewMatrix, |
| const GrStyledShape& shape, |
| const SkMaskFilter* filter, |
| const SkIRect& clipBounds, |
| GrPaint&& paint, |
| const GrUniqueKey& key) { |
| SkASSERT(filter); |
| SkASSERT(!shape.style().applies()); |
| |
| auto threadSafeViewCache = rContext->priv().threadSafeViewCache(); |
| |
| GrSurfaceProxyView filteredMaskView; |
| |
| SkStrokeRec::InitStyle fillOrHairline = shape.style().isSimpleHairline() |
| ? SkStrokeRec::kHairline_InitStyle |
| : SkStrokeRec::kFill_InitStyle; |
| |
| if (key.isValid()) { |
| filteredMaskView = threadSafeViewCache->find(key); |
| } |
| |
| SkIRect drawRect; |
| if (filteredMaskView) { |
| SkASSERT(kMaskOrigin == filteredMaskView.origin()); |
| |
| SkRect devBounds = shape.bounds(); |
| viewMatrix.mapRect(&devBounds); |
| |
| // Here we need to recompute the destination bounds in order to draw the mask correctly |
| SkMask srcM, dstM; |
| if (!SkDraw::ComputeMaskBounds(devBounds, &clipBounds, filter, &viewMatrix, |
| &srcM.fBounds)) { |
| return false; |
| } |
| |
| srcM.fFormat = SkMask::kA8_Format; |
| |
| if (!as_MFB(filter)->filterMask(&dstM, srcM, viewMatrix, nullptr)) { |
| return false; |
| } |
| |
| // Unfortunately, we cannot double check that the computed bounds (i.e., dstM.fBounds) |
| // match the stored bounds of the mask bc the proxy may have been recreated and, |
| // when it is recreated, it just gets the bounds of the underlying GrTexture (which |
| // might be a loose fit). |
| drawRect = dstM.fBounds; |
| } else { |
| // TODO: it seems like we could create an SkDraw here and set its fMatrix field rather |
| // than explicitly transforming the path to device space. |
| SkPath devPath; |
| |
| shape.asPath(&devPath); |
| |
| devPath.transform(viewMatrix); |
| |
| SkMask srcM, dstM; |
| if (!SkDraw::DrawToMask(devPath, &clipBounds, filter, &viewMatrix, &srcM, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode, fillOrHairline)) { |
| return false; |
| } |
| SkAutoMaskFreeImage autoSrc(srcM.fImage); |
| |
| SkASSERT(SkMask::kA8_Format == srcM.fFormat); |
| |
| if (!as_MFB(filter)->filterMask(&dstM, srcM, viewMatrix, nullptr)) { |
| return false; |
| } |
| // this will free-up dstM when we're done (allocated in filterMask()) |
| SkAutoMaskFreeImage autoDst(dstM.fImage); |
| |
| if (clip_bounds_quick_reject(clipBounds, dstM.fBounds)) { |
| return false; |
| } |
| |
| // we now have a device-aligned 8bit mask in dstM, ready to be drawn using |
| // the current clip (and identity matrix) and GrPaint settings |
| SkBitmap bm; |
| if (!bm.installPixels(SkImageInfo::MakeA8(dstM.fBounds.width(), dstM.fBounds.height()), |
| autoDst.release(), dstM.fRowBytes, mask_release_proc, nullptr)) { |
| return false; |
| } |
| bm.setImmutable(); |
| |
| GrBitmapTextureMaker maker(rContext, bm, SkBackingFit::kApprox); |
| filteredMaskView = maker.view(GrMipmapped::kNo); |
| if (!filteredMaskView.proxy()) { |
| return false; |
| } |
| |
| SkASSERT(kMaskOrigin == filteredMaskView.origin()); |
| |
| drawRect = dstM.fBounds; |
| |
| if (key.isValid()) { |
| filteredMaskView = threadSafeViewCache->add(key, filteredMaskView); |
| } |
| } |
| |
| return draw_mask(renderTargetContext, clipData, viewMatrix, drawRect, std::move(paint), |
| std::move(filteredMaskView)); |
| } |
| |
| // Create a mask of 'shape' and return the resulting renderTargetContext |
| static std::unique_ptr<GrRenderTargetContext> create_mask_GPU(GrRecordingContext* context, |
| const SkIRect& maskRect, |
| const SkMatrix& origViewMatrix, |
| const GrStyledShape& shape, |
| int sampleCnt) { |
| // Use GrResourceProvider::MakeApprox to implement our own approximate size matching, but demand |
| // a "SkBackingFit::kExact" size match on the actual render target. We do this because the |
| // filter will reach outside the src bounds, so we need to pre-clear these values to ensure a |
| // "decal" sampling effect (i.e., ensure reads outside the src bounds return alpha=0). |
| // |
| // FIXME: Reads outside the left and top edges will actually clamp to the edge pixel. And in the |
| // event that MakeApprox does not change the size, reads outside the right and/or bottom will do |
| // the same. We should offset our filter within the render target and expand the size as needed |
| // to guarantee at least 1px of padding on all sides. |
| auto approxSize = GrResourceProvider::MakeApprox(maskRect.size()); |
| auto rtContext = GrRenderTargetContext::MakeWithFallback( |
| context, GrColorType::kAlpha_8, nullptr, SkBackingFit::kExact, approxSize, sampleCnt, |
| GrMipmapped::kNo, GrProtected::kNo, kMaskOrigin); |
| if (!rtContext) { |
| return nullptr; |
| } |
| |
| rtContext->clear(SK_PMColor4fTRANSPARENT); |
| |
| GrPaint maskPaint; |
| maskPaint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op); |
| |
| // setup new clip |
| GrFixedClip clip(rtContext->dimensions(), SkIRect::MakeWH(maskRect.width(), maskRect.height())); |
| |
| // Draw the mask into maskTexture with the path's integerized top-left at the origin using |
| // maskPaint. |
| SkMatrix viewMatrix = origViewMatrix; |
| viewMatrix.postTranslate(-SkIntToScalar(maskRect.fLeft), -SkIntToScalar(maskRect.fTop)); |
| rtContext->drawShape(&clip, std::move(maskPaint), GrAA::kYes, viewMatrix, shape); |
| return rtContext; |
| } |
| |
| static bool get_unclipped_shape_dev_bounds(const GrStyledShape& shape, const SkMatrix& matrix, |
| SkIRect* devBounds) { |
| SkRect shapeBounds = shape.styledBounds(); |
| if (shapeBounds.isEmpty()) { |
| return false; |
| } |
| SkRect shapeDevBounds; |
| matrix.mapRect(&shapeDevBounds, shapeBounds); |
| // Even though these are "unclipped" bounds we still clip to the int32_t range. |
| // This is the largest int32_t that is representable exactly as a float. The next 63 larger ints |
| // would round down to this value when cast to a float, but who really cares. |
| // INT32_MIN is exactly representable. |
| static constexpr int32_t kMaxInt = 2147483520; |
| if (!shapeDevBounds.intersect(SkRect::MakeLTRB(INT32_MIN, INT32_MIN, kMaxInt, kMaxInt))) { |
| return false; |
| } |
| // Make sure that the resulting SkIRect can have representable width and height |
| if (SkScalarRoundToInt(shapeDevBounds.width()) > kMaxInt || |
| SkScalarRoundToInt(shapeDevBounds.height()) > kMaxInt) { |
| return false; |
| } |
| shapeDevBounds.roundOut(devBounds); |
| return true; |
| } |
| |
| // Gets the shape bounds, the clip bounds, and the intersection (if any). Returns false if there |
| // is no intersection. |
| static bool get_shape_and_clip_bounds(GrRenderTargetContext* renderTargetContext, |
| const GrClip* clip, |
| const GrStyledShape& shape, |
| const SkMatrix& matrix, |
| SkIRect* unclippedDevShapeBounds, |
| SkIRect* devClipBounds) { |
| // compute bounds as intersection of rt size, clip, and path |
| *devClipBounds = clip ? clip->getConservativeBounds() |
| : SkIRect::MakeWH(renderTargetContext->width(), |
| renderTargetContext->height()); |
| |
| if (!get_unclipped_shape_dev_bounds(shape, matrix, unclippedDevShapeBounds)) { |
| *unclippedDevShapeBounds = SkIRect::MakeEmpty(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void draw_shape_with_mask_filter(GrRecordingContext* context, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip* clip, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkMaskFilterBase* maskFilter, |
| const GrStyledShape& origShape) { |
| SkASSERT(maskFilter); |
| |
| const GrStyledShape* shape = &origShape; |
| SkTLazy<GrStyledShape> tmpShape; |
| |
| if (origShape.style().applies()) { |
| SkScalar styleScale = GrStyle::MatrixToScaleFactor(viewMatrix); |
| if (0 == styleScale) { |
| return; |
| } |
| |
| tmpShape.init(origShape.applyStyle(GrStyle::Apply::kPathEffectAndStrokeRec, styleScale)); |
| if (tmpShape->isEmpty()) { |
| return; |
| } |
| |
| shape = tmpShape.get(); |
| } |
| |
| if (maskFilter->directFilterMaskGPU(context, renderTargetContext, std::move(paint), clip, |
| viewMatrix, *shape)) { |
| // the mask filter was able to draw itself directly, so there's nothing |
| // left to do. |
| return; |
| } |
| assert_alive(paint); |
| |
| // If the path is hairline, ignore inverse fill. |
| bool inverseFilled = shape->inverseFilled() && |
| !GrPathRenderer::IsStrokeHairlineOrEquivalent(shape->style(), |
| viewMatrix, nullptr); |
| |
| SkIRect unclippedDevShapeBounds, devClipBounds; |
| if (!get_shape_and_clip_bounds(renderTargetContext, clip, *shape, viewMatrix, |
| &unclippedDevShapeBounds, &devClipBounds)) { |
| // TODO: just cons up an opaque mask here |
| if (!inverseFilled) { |
| return; |
| } |
| } |
| |
| // To prevent overloading the cache with entries during animations we limit the cache of masks |
| // to cases where the matrix preserves axis alignment. |
| #ifdef SK_DISABLE_MASKFILTERED_MASK_CACHING |
| bool useCache = false; |
| #else |
| bool useCache = !inverseFilled && viewMatrix.preservesAxisAlignment() && |
| shape->hasUnstyledKey() && as_MFB(maskFilter)->asABlur(nullptr); |
| #endif |
| |
| const SkIRect* boundsForClip = &devClipBounds; |
| if (useCache) { |
| SkIRect clippedMaskRect, unClippedMaskRect; |
| maskFilter->canFilterMaskGPU(*shape, unclippedDevShapeBounds, devClipBounds, |
| viewMatrix, &clippedMaskRect); |
| maskFilter->canFilterMaskGPU(*shape, unclippedDevShapeBounds, unclippedDevShapeBounds, |
| viewMatrix, &unClippedMaskRect); |
| if (clippedMaskRect.isEmpty()) { |
| return; |
| } |
| |
| // Use the cache only if >50% of the filtered mask is visible. |
| int unclippedWidth = unClippedMaskRect.width(); |
| int unclippedHeight = unClippedMaskRect.height(); |
| int64_t unclippedArea = sk_64_mul(unclippedWidth, unclippedHeight); |
| int64_t clippedArea = sk_64_mul(clippedMaskRect.width(), clippedMaskRect.height()); |
| int maxTextureSize = renderTargetContext->caps()->maxTextureSize(); |
| if (unclippedArea > 2 * clippedArea || unclippedWidth > maxTextureSize || |
| unclippedHeight > maxTextureSize) { |
| useCache = false; |
| } else { |
| // Make the clip not affect the mask |
| boundsForClip = &unclippedDevShapeBounds; |
| } |
| } |
| |
| GrUniqueKey maskKey; |
| if (useCache) { |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey::Builder builder(&maskKey, kDomain, 5 + 2 + shape->unstyledKeySize(), |
| "Mask Filtered Masks"); |
| |
| // We require the upper left 2x2 of the matrix to match exactly for a cache hit. |
| SkScalar sx = viewMatrix.get(SkMatrix::kMScaleX); |
| SkScalar sy = viewMatrix.get(SkMatrix::kMScaleY); |
| SkScalar kx = viewMatrix.get(SkMatrix::kMSkewX); |
| SkScalar ky = viewMatrix.get(SkMatrix::kMSkewY); |
| SkScalar tx = viewMatrix.get(SkMatrix::kMTransX); |
| SkScalar ty = viewMatrix.get(SkMatrix::kMTransY); |
| // Allow 8 bits each in x and y of subpixel positioning. |
| SkFixed fracX = SkScalarToFixed(SkScalarFraction(tx)) & 0x0000FF00; |
| SkFixed fracY = SkScalarToFixed(SkScalarFraction(ty)) & 0x0000FF00; |
| |
| builder[0] = SkFloat2Bits(sx); |
| builder[1] = SkFloat2Bits(sy); |
| builder[2] = SkFloat2Bits(kx); |
| builder[3] = SkFloat2Bits(ky); |
| // Distinguish between hairline and filled paths. For hairlines, we also need to include |
| // the cap. (SW grows hairlines by 0.5 pixel with round and square caps). Note that |
| // stroke-and-fill of hairlines is turned into pure fill by SkStrokeRec, so this covers |
| // all cases we might see. |
| uint32_t styleBits = shape->style().isSimpleHairline() |
| ? ((shape->style().strokeRec().getCap() << 1) | 1) |
| : 0; |
| builder[4] = fracX | (fracY >> 8) | (styleBits << 16); |
| |
| SkMaskFilterBase::BlurRec rec; |
| SkAssertResult(as_MFB(maskFilter)->asABlur(&rec)); |
| |
| builder[5] = rec.fStyle; // TODO: we could put this with the other style bits |
| builder[6] = SkFloat2Bits(rec.fSigma); |
| shape->writeUnstyledKey(&builder[7]); |
| } |
| |
| SkIRect maskRect; |
| if (maskFilter->canFilterMaskGPU(*shape, |
| unclippedDevShapeBounds, |
| *boundsForClip, |
| viewMatrix, |
| &maskRect)) { |
| if (clip_bounds_quick_reject(*boundsForClip, maskRect)) { |
| // clipped out |
| return; |
| } |
| |
| GrSurfaceProxyView filteredMaskView; |
| |
| GrProxyProvider* proxyProvider = context->priv().proxyProvider(); |
| |
| // TODO: this path should also use the thread-safe proxy-view cache! |
| if (maskKey.isValid()) { |
| filteredMaskView = find_filtered_mask(proxyProvider, maskKey); |
| } |
| |
| if (!filteredMaskView) { |
| std::unique_ptr<GrRenderTargetContext> maskRTC(create_mask_GPU( |
| context, |
| maskRect, |
| viewMatrix, |
| *shape, |
| renderTargetContext->numSamples())); |
| if (maskRTC) { |
| filteredMaskView = maskFilter->filterMaskGPU(context, |
| maskRTC->readSurfaceView(), |
| maskRTC->colorInfo().colorType(), |
| maskRTC->colorInfo().alphaType(), |
| viewMatrix, |
| maskRect); |
| if (filteredMaskView.proxy() && maskKey.isValid()) { |
| SkASSERT(filteredMaskView.asTextureProxy()); |
| proxyProvider->assignUniqueKeyToProxy(maskKey, |
| filteredMaskView.asTextureProxy()); |
| } |
| } |
| } |
| |
| if (filteredMaskView) { |
| if (draw_mask(renderTargetContext, clip, viewMatrix, maskRect, std::move(paint), |
| std::move(filteredMaskView))) { |
| // This path is completely drawn |
| return; |
| } |
| assert_alive(paint); |
| } |
| } |
| |
| sw_draw_with_mask_filter(context, renderTargetContext, clip, viewMatrix, *shape, |
| maskFilter, *boundsForClip, std::move(paint), maskKey); |
| } |
| |
| void GrBlurUtils::drawShapeWithMaskFilter(GrRecordingContext* context, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip* clip, |
| const GrStyledShape& shape, |
| GrPaint&& paint, |
| const SkMatrix& viewMatrix, |
| const SkMaskFilter* mf) { |
| draw_shape_with_mask_filter(context, renderTargetContext, clip, std::move(paint), |
| viewMatrix, as_MFB(mf), shape); |
| } |
| |
| void GrBlurUtils::drawShapeWithMaskFilter(GrRecordingContext* context, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip* clip, |
| const SkPaint& paint, |
| const SkMatrixProvider& matrixProvider, |
| const GrStyledShape& shape) { |
| if (context->abandoned()) { |
| return; |
| } |
| |
| GrPaint grPaint; |
| if (!SkPaintToGrPaint(context, renderTargetContext->colorInfo(), paint, matrixProvider, |
| &grPaint)) { |
| return; |
| } |
| |
| const SkMatrix& viewMatrix(matrixProvider.localToDevice()); |
| SkMaskFilterBase* mf = as_MFB(paint.getMaskFilter()); |
| if (mf && !mf->hasFragmentProcessor()) { |
| // The MaskFilter wasn't already handled in SkPaintToGrPaint |
| draw_shape_with_mask_filter(context, renderTargetContext, clip, std::move(grPaint), |
| viewMatrix, mf, shape); |
| } else { |
| GrAA aa = GrAA(paint.isAntiAlias()); |
| renderTargetContext->drawShape(clip, std::move(grPaint), aa, viewMatrix, shape); |
| } |
| } |