| /* |
| * 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 "GrBlurUtils.h" |
| #include "GrDrawContext.h" |
| #include "GrCaps.h" |
| #include "GrContext.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "GrStrokeInfo.h" |
| #include "GrTexture.h" |
| #include "GrTextureProvider.h" |
| #include "SkDraw.h" |
| #include "SkGrPriv.h" |
| #include "SkMaskFilter.h" |
| #include "SkPaint.h" |
| |
| static bool clip_bounds_quick_reject(const SkIRect& clipBounds, const SkIRect& rect) { |
| return clipBounds.isEmpty() || rect.isEmpty() || !SkIRect::Intersects(clipBounds, rect); |
| } |
| |
| // 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(GrDrawContext* drawContext, |
| const GrClip& clip, |
| const SkMatrix& viewMatrix, |
| const SkRect& maskRect, |
| GrPaint* grp, |
| GrTexture* mask) { |
| SkMatrix matrix; |
| matrix.setTranslate(-maskRect.fLeft, -maskRect.fTop); |
| matrix.postIDiv(mask->width(), mask->height()); |
| |
| grp->addCoverageFragmentProcessor(GrSimpleTextureEffect::Create(mask, matrix, |
| kDevice_GrCoordSet))->unref(); |
| |
| SkMatrix inverse; |
| if (!viewMatrix.invert(&inverse)) { |
| return false; |
| } |
| drawContext->fillRectWithLocalMatrix(clip, *grp, SkMatrix::I(), maskRect, inverse); |
| return true; |
| } |
| |
| static bool sw_draw_with_mask_filter(GrDrawContext* drawContext, |
| GrTextureProvider* textureProvider, |
| const GrClip& clipData, |
| const SkMatrix& viewMatrix, |
| const SkPath& devPath, |
| const SkMaskFilter* filter, |
| const SkIRect& clipBounds, |
| GrPaint* grp, |
| SkPaint::Style style) { |
| SkMask srcM, dstM; |
| |
| if (!SkDraw::DrawToMask(devPath, &clipBounds, filter, &viewMatrix, &srcM, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode, style)) { |
| return false; |
| } |
| SkAutoMaskFreeImage autoSrc(srcM.fImage); |
| |
| if (!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 |
| GrSurfaceDesc desc; |
| desc.fWidth = dstM.fBounds.width(); |
| desc.fHeight = dstM.fBounds.height(); |
| desc.fConfig = kAlpha_8_GrPixelConfig; |
| |
| SkAutoTUnref<GrTexture> texture(textureProvider->createApproxTexture(desc)); |
| if (!texture) { |
| return false; |
| } |
| texture->writePixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig, |
| dstM.fImage, dstM.fRowBytes); |
| |
| SkRect maskRect = SkRect::Make(dstM.fBounds); |
| |
| return draw_mask(drawContext, clipData, viewMatrix, maskRect, grp, texture); |
| } |
| |
| // Create a mask of 'devPath' and place the result in 'mask'. |
| static GrTexture* create_mask_GPU(GrContext* context, |
| SkRect* maskRect, |
| const SkPath& devPath, |
| const GrStrokeInfo& strokeInfo, |
| bool doAA, |
| int sampleCnt) { |
| // This mask will ultimately be drawn as a non-AA rect (see draw_mask). |
| // Non-AA rects have a bad habit of snapping arbitrarily. Integerize here |
| // so the mask draws in a reproducible manner. |
| *maskRect = SkRect::Make(maskRect->roundOut()); |
| |
| GrSurfaceDesc desc; |
| desc.fFlags = kRenderTarget_GrSurfaceFlag; |
| desc.fWidth = SkScalarCeilToInt(maskRect->width()); |
| desc.fHeight = SkScalarCeilToInt(maskRect->height()); |
| desc.fSampleCnt = doAA ? sampleCnt : 0; |
| // We actually only need A8, but it often isn't supported as a |
| // render target so default to RGBA_8888 |
| desc.fConfig = kRGBA_8888_GrPixelConfig; |
| |
| if (context->caps()->isConfigRenderable(kAlpha_8_GrPixelConfig, desc.fSampleCnt > 0)) { |
| desc.fConfig = kAlpha_8_GrPixelConfig; |
| } |
| |
| GrTexture* mask = context->textureProvider()->createApproxTexture(desc); |
| if (nullptr == mask) { |
| return nullptr; |
| } |
| |
| SkRect clipRect = SkRect::MakeWH(maskRect->width(), maskRect->height()); |
| |
| SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(mask->asRenderTarget())); |
| if (!drawContext) { |
| return nullptr; |
| } |
| |
| drawContext->clear(nullptr, 0x0, true); |
| |
| GrPaint tempPaint; |
| tempPaint.setAntiAlias(doAA); |
| tempPaint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op); |
| |
| // setup new clip |
| GrClip clip(clipRect); |
| |
| // Draw the mask into maskTexture with the path's integerized top-left at |
| // the origin using tempPaint. |
| SkMatrix translate; |
| translate.setTranslate(-maskRect->fLeft, -maskRect->fTop); |
| drawContext->drawPath(clip, tempPaint, translate, devPath, strokeInfo); |
| return mask; |
| } |
| |
| static void draw_path_with_mask_filter(GrContext* context, |
| GrDrawContext* drawContext, |
| const GrClip& clip, |
| GrPaint* paint, |
| const SkMatrix& viewMatrix, |
| const SkMaskFilter* maskFilter, |
| const SkPathEffect* pathEffect, |
| const GrStrokeInfo& origStrokeInfo, |
| SkPath* pathPtr, |
| bool pathIsMutable) { |
| SkASSERT(maskFilter); |
| |
| SkIRect clipBounds; |
| clip.getConservativeBounds(drawContext->width(), drawContext->height(), &clipBounds); |
| SkTLazy<SkPath> tmpPath; |
| GrStrokeInfo strokeInfo(origStrokeInfo); |
| |
| static const SkRect* cullRect = nullptr; // TODO: what is our bounds? |
| |
| SkASSERT(strokeInfo.isDashed() || !pathEffect); |
| |
| if (!strokeInfo.isHairlineStyle()) { |
| SkPath* strokedPath = pathIsMutable ? pathPtr : tmpPath.init(); |
| if (strokeInfo.isDashed()) { |
| if (pathEffect->filterPath(strokedPath, *pathPtr, &strokeInfo, cullRect)) { |
| pathPtr = strokedPath; |
| pathPtr->setIsVolatile(true); |
| pathIsMutable = true; |
| } |
| strokeInfo.removeDash(); |
| } |
| if (strokeInfo.applyToPath(strokedPath, *pathPtr)) { |
| // Apply the stroke to the path if there is one |
| pathPtr = strokedPath; |
| pathPtr->setIsVolatile(true); |
| pathIsMutable = true; |
| strokeInfo.setFillStyle(); |
| } |
| } |
| |
| // avoid possibly allocating a new path in transform if we can |
| SkPath* devPathPtr = pathIsMutable ? pathPtr : tmpPath.init(); |
| if (!pathIsMutable) { |
| devPathPtr->setIsVolatile(true); |
| } |
| |
| // transform the path into device space |
| pathPtr->transform(viewMatrix, devPathPtr); |
| |
| SkRect maskRect; |
| if (maskFilter->canFilterMaskGPU(SkRRect::MakeRect(devPathPtr->getBounds()), |
| clipBounds, |
| viewMatrix, |
| &maskRect)) { |
| SkIRect finalIRect; |
| maskRect.roundOut(&finalIRect); |
| if (clip_bounds_quick_reject(clipBounds, finalIRect)) { |
| // clipped out |
| return; |
| } |
| |
| if (maskFilter->directFilterMaskGPU(context->textureProvider(), |
| drawContext, |
| paint, |
| clip, |
| viewMatrix, |
| strokeInfo, |
| *devPathPtr)) { |
| // the mask filter was able to draw itself directly, so there's nothing |
| // left to do. |
| return; |
| } |
| |
| SkAutoTUnref<GrTexture> mask(create_mask_GPU(context, |
| &maskRect, |
| *devPathPtr, |
| strokeInfo, |
| paint->isAntiAlias(), |
| drawContext->numColorSamples())); |
| if (mask) { |
| GrTexture* filtered; |
| |
| if (maskFilter->filterMaskGPU(mask, viewMatrix, maskRect, &filtered, true)) { |
| // filterMaskGPU gives us ownership of a ref to the result |
| SkAutoTUnref<GrTexture> atu(filtered); |
| if (draw_mask(drawContext, clip, viewMatrix, maskRect, paint, filtered)) { |
| // This path is completely drawn |
| return; |
| } |
| } |
| } |
| } |
| |
| // draw the mask on the CPU - this is a fallthrough path in case the |
| // GPU path fails |
| SkPaint::Style style = strokeInfo.isHairlineStyle() ? SkPaint::kStroke_Style : |
| SkPaint::kFill_Style; |
| sw_draw_with_mask_filter(drawContext, context->textureProvider(), |
| clip, viewMatrix, *devPathPtr, |
| maskFilter, clipBounds, paint, style); |
| } |
| |
| void GrBlurUtils::drawPathWithMaskFilter(GrContext* context, |
| GrDrawContext* drawContext, |
| const GrClip& clip, |
| const SkPath& origPath, |
| GrPaint* paint, |
| const SkMatrix& viewMatrix, |
| const SkMaskFilter* mf, |
| const SkPathEffect* pathEffect, |
| const GrStrokeInfo& origStrokeInfo, |
| bool pathIsMutable) { |
| SkPath* pathPtr = const_cast<SkPath*>(&origPath); |
| |
| SkTLazy<SkPath> tmpPath; |
| GrStrokeInfo strokeInfo(origStrokeInfo); |
| |
| if (!strokeInfo.isDashed() && pathEffect && pathEffect->filterPath(tmpPath.init(), *pathPtr, |
| &strokeInfo, nullptr)) { |
| pathPtr = tmpPath.get(); |
| pathPtr->setIsVolatile(true); |
| pathIsMutable = true; |
| pathEffect = nullptr; |
| } |
| |
| draw_path_with_mask_filter(context, drawContext, clip, paint, viewMatrix, mf, pathEffect, |
| strokeInfo, pathPtr, pathIsMutable); |
| } |
| |
| void GrBlurUtils::drawPathWithMaskFilter(GrContext* context, |
| GrDrawContext* drawContext, |
| const GrClip& clip, |
| const SkPath& origSrcPath, |
| const SkPaint& paint, |
| const SkMatrix& origViewMatrix, |
| const SkMatrix* prePathMatrix, |
| const SkIRect& clipBounds, |
| bool pathIsMutable) { |
| SkASSERT(!pathIsMutable || origSrcPath.isVolatile()); |
| |
| GrStrokeInfo strokeInfo(paint); |
| // comment out the line below to determine if it is the reason that the chrome mac perf bot |
| // has begun crashing |
| // strokeInfo.setResScale(SkDraw::ComputeResScaleForStroking(origViewMatrix)); |
| |
| // If we have a prematrix, apply it to the path, optimizing for the case |
| // where the original path can in fact be modified in place (even though |
| // its parameter type is const). |
| SkPath* pathPtr = const_cast<SkPath*>(&origSrcPath); |
| SkTLazy<SkPath> tmpPath; |
| SkTLazy<SkPath> effectPath; |
| SkPathEffect* pathEffect = paint.getPathEffect(); |
| |
| SkMatrix viewMatrix = origViewMatrix; |
| |
| if (prePathMatrix) { |
| // stroking, path effects, and blurs are supposed to be applied *after* the prePathMatrix. |
| // The pre-path-matrix also should not affect shading. |
| if (!paint.getMaskFilter() && !pathEffect && !paint.getShader() && |
| (strokeInfo.isFillStyle() || strokeInfo.isHairlineStyle())) { |
| viewMatrix.preConcat(*prePathMatrix); |
| } else { |
| SkPath* result = pathPtr; |
| |
| if (!pathIsMutable) { |
| result = tmpPath.init(); |
| result->setIsVolatile(true); |
| pathIsMutable = true; |
| } |
| // should I push prePathMatrix on our MV stack temporarily, instead |
| // of applying it here? See SkDraw.cpp |
| pathPtr->transform(*prePathMatrix, result); |
| pathPtr = result; |
| } |
| } |
| // at this point we're done with prePathMatrix |
| SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;) |
| |
| SkTLazy<SkPath> tmpPath2; |
| |
| if (!strokeInfo.isDashed() && pathEffect && |
| pathEffect->filterPath(tmpPath2.init(), *pathPtr, &strokeInfo, nullptr)) { |
| pathPtr = tmpPath2.get(); |
| pathPtr->setIsVolatile(true); |
| pathIsMutable = true; |
| pathEffect = nullptr; |
| } |
| |
| GrPaint grPaint; |
| if (!SkPaintToGrPaint(context, paint, viewMatrix, &grPaint)) { |
| return; |
| } |
| |
| if (paint.getMaskFilter()) { |
| draw_path_with_mask_filter(context, drawContext, clip, &grPaint, viewMatrix, |
| paint.getMaskFilter(), pathEffect, strokeInfo, |
| pathPtr, pathIsMutable); |
| } else { |
| drawContext->drawPath(clip, grPaint, viewMatrix, *pathPtr, strokeInfo); |
| } |
| } |
| |
