| /* |
| * 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 "GrRenderTargetContext.h" |
| #include "GrCaps.h" |
| #include "GrContext.h" |
| #include "GrFixedClip.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "GrStyle.h" |
| #include "GrTexture.h" |
| #include "GrTextureProvider.h" |
| #include "SkDraw.h" |
| #include "SkGrPriv.h" |
| #include "SkMaskFilter.h" |
| #include "SkPaint.h" |
| #include "SkTLazy.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(GrRenderTargetContext* renderTargetContext, |
| const GrClip& clip, |
| const SkMatrix& viewMatrix, |
| const SkIRect& maskRect, |
| GrPaint* grp, |
| GrTexture* mask) { |
| SkMatrix matrix; |
| matrix.setTranslate(-SkIntToScalar(maskRect.fLeft), -SkIntToScalar(maskRect.fTop)); |
| matrix.postIDiv(mask->width(), mask->height()); |
| matrix.preConcat(viewMatrix); |
| grp->addCoverageFragmentProcessor(GrSimpleTextureEffect::Make(mask, nullptr, matrix)); |
| |
| SkMatrix inverse; |
| if (!viewMatrix.invert(&inverse)) { |
| return false; |
| } |
| renderTargetContext->fillRectWithLocalMatrix(clip, *grp, SkMatrix::I(), SkRect::Make(maskRect), |
| inverse); |
| return true; |
| } |
| |
| static bool sw_draw_with_mask_filter(GrRenderTargetContext* renderTargetContext, |
| GrTextureProvider* textureProvider, |
| const GrClip& clipData, |
| const SkMatrix& viewMatrix, |
| const SkPath& devPath, |
| const SkMaskFilter* filter, |
| const SkIRect& clipBounds, |
| GrPaint* grp, |
| SkStrokeRec::InitStyle fillOrHairline) { |
| SkMask srcM, dstM; |
| if (!SkDraw::DrawToMask(devPath, &clipBounds, filter, &viewMatrix, &srcM, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode, fillOrHairline)) { |
| 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; |
| |
| sk_sp<GrTexture> texture(textureProvider->createApproxTexture(desc)); |
| if (!texture) { |
| return false; |
| } |
| texture->writePixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig, |
| dstM.fImage, dstM.fRowBytes); |
| |
| return draw_mask(renderTargetContext, clipData, viewMatrix, dstM.fBounds, grp, texture.get()); |
| } |
| |
| // Create a mask of 'devPath' and place the result in 'mask'. |
| static sk_sp<GrTexture> create_mask_GPU(GrContext* context, |
| const SkIRect& maskRect, |
| const SkPath& devPath, |
| SkStrokeRec::InitStyle fillOrHairline, |
| bool doAA, |
| int sampleCnt) { |
| if (!doAA) { |
| // Don't need MSAA if mask isn't AA |
| sampleCnt = 0; |
| } |
| |
| sk_sp<GrRenderTargetContext> renderTargetContext(context->makeRenderTargetContextWithFallback( |
| SkBackingFit::kApprox, maskRect.width(), maskRect.height(), kAlpha_8_GrPixelConfig, nullptr, |
| sampleCnt)); |
| if (!renderTargetContext) { |
| return nullptr; |
| } |
| |
| renderTargetContext->clear(nullptr, 0x0, true); |
| |
| GrPaint tempPaint; |
| tempPaint.setAntiAlias(doAA); |
| tempPaint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op); |
| |
| // setup new clip |
| const SkIRect clipRect = SkIRect::MakeWH(maskRect.width(), maskRect.height()); |
| GrFixedClip clip(clipRect); |
| |
| // Draw the mask into maskTexture with the path's integerized top-left at |
| // the origin using tempPaint. |
| SkMatrix translate; |
| translate.setTranslate(-SkIntToScalar(maskRect.fLeft), -SkIntToScalar(maskRect.fTop)); |
| renderTargetContext->drawPath(clip, tempPaint, translate, devPath, GrStyle(fillOrHairline)); |
| return renderTargetContext->asTexture();; |
| } |
| |
| static void draw_path_with_mask_filter(GrContext* context, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip& clip, |
| GrPaint* paint, |
| const SkMatrix& viewMatrix, |
| const SkMaskFilter* maskFilter, |
| const GrStyle& style, |
| const SkPath* path, |
| bool pathIsMutable) { |
| SkASSERT(maskFilter); |
| |
| SkIRect clipBounds; |
| clip.getConservativeBounds(renderTargetContext->width(), renderTargetContext->height(), |
| &clipBounds); |
| SkTLazy<SkPath> tmpPath; |
| SkStrokeRec::InitStyle fillOrHairline; |
| |
| // We just fully apply the style here. |
| if (style.applies()) { |
| SkScalar scale = GrStyle::MatrixToScaleFactor(viewMatrix); |
| if (0 == scale || !style.applyToPath(tmpPath.init(), &fillOrHairline, *path, scale)) { |
| return; |
| } |
| pathIsMutable = true; |
| path = tmpPath.get(); |
| } else if (style.isSimpleHairline()) { |
| fillOrHairline = SkStrokeRec::kHairline_InitStyle; |
| } else { |
| SkASSERT(style.isSimpleFill()); |
| fillOrHairline = SkStrokeRec::kFill_InitStyle; |
| } |
| |
| // transform the path into device space |
| if (!viewMatrix.isIdentity()) { |
| SkPath* result; |
| if (pathIsMutable) { |
| result = const_cast<SkPath*>(path); |
| } else { |
| if (!tmpPath.isValid()) { |
| tmpPath.init(); |
| } |
| result = tmpPath.get(); |
| } |
| path->transform(viewMatrix, result); |
| path = result; |
| result->setIsVolatile(true); |
| pathIsMutable = true; |
| } |
| |
| SkRect maskRect; |
| if (maskFilter->canFilterMaskGPU(SkRRect::MakeRect(path->getBounds()), |
| clipBounds, |
| viewMatrix, |
| &maskRect)) { |
| // 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. |
| SkIRect finalIRect; |
| maskRect.roundOut(&finalIRect); |
| if (clip_bounds_quick_reject(clipBounds, finalIRect)) { |
| // clipped out |
| return; |
| } |
| |
| if (maskFilter->directFilterMaskGPU(context->textureProvider(), |
| renderTargetContext, |
| paint, |
| clip, |
| viewMatrix, |
| SkStrokeRec(fillOrHairline), |
| *path)) { |
| // the mask filter was able to draw itself directly, so there's nothing |
| // left to do. |
| return; |
| } |
| |
| sk_sp<GrTexture> mask(create_mask_GPU(context, |
| finalIRect, |
| *path, |
| fillOrHairline, |
| paint->isAntiAlias(), |
| renderTargetContext->numColorSamples())); |
| if (mask) { |
| GrTexture* filtered; |
| |
| if (maskFilter->filterMaskGPU(mask.get(), viewMatrix, finalIRect, &filtered)) { |
| // filterMaskGPU gives us ownership of a ref to the result |
| sk_sp<GrTexture> atu(filtered); |
| if (draw_mask(renderTargetContext, clip, viewMatrix, finalIRect, paint, filtered)) { |
| // This path is completely drawn |
| return; |
| } |
| } |
| } |
| } |
| |
| sw_draw_with_mask_filter(renderTargetContext, context->textureProvider(), |
| clip, viewMatrix, *path, |
| maskFilter, clipBounds, paint, fillOrHairline); |
| } |
| |
| void GrBlurUtils::drawPathWithMaskFilter(GrContext* context, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip& clip, |
| const SkPath& path, |
| GrPaint* paint, |
| const SkMatrix& viewMatrix, |
| const SkMaskFilter* mf, |
| const GrStyle& style, |
| bool pathIsMutable) { |
| draw_path_with_mask_filter(context, renderTargetContext, clip, paint, viewMatrix, mf, |
| style, &path, pathIsMutable); |
| } |
| |
| void GrBlurUtils::drawPathWithMaskFilter(GrContext* context, |
| GrRenderTargetContext* renderTargetContext, |
| const GrClip& clip, |
| const SkPath& origPath, |
| const SkPaint& paint, |
| const SkMatrix& origViewMatrix, |
| const SkMatrix* prePathMatrix, |
| const SkIRect& clipBounds, |
| bool pathIsMutable) { |
| SkASSERT(!pathIsMutable || origPath.isVolatile()); |
| |
| GrStyle style(paint); |
| // 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). |
| |
| const SkPath* path = &origPath; |
| SkTLazy<SkPath> tmpPath; |
| |
| SkMatrix viewMatrix = origViewMatrix; |
| |
| if (prePathMatrix) { |
| // Styling, blurs, and shading are supposed to be applied *after* the prePathMatrix. |
| if (!paint.getMaskFilter() && !paint.getShader() && !style.applies()) { |
| viewMatrix.preConcat(*prePathMatrix); |
| } else { |
| SkPath* result = pathIsMutable ? const_cast<SkPath*>(path) : tmpPath.init(); |
| pathIsMutable = true; |
| path->transform(*prePathMatrix, result); |
| path = result; |
| result->setIsVolatile(true); |
| } |
| } |
| // at this point we're done with prePathMatrix |
| SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;) |
| |
| GrPaint grPaint; |
| if (!SkPaintToGrPaint(context, renderTargetContext, paint, viewMatrix, &grPaint)) { |
| return; |
| } |
| |
| SkMaskFilter* mf = paint.getMaskFilter(); |
| if (mf && !mf->asFragmentProcessor(nullptr, nullptr, viewMatrix)) { |
| // The MaskFilter wasn't already handled in SkPaintToGrPaint |
| draw_path_with_mask_filter(context, renderTargetContext, clip, &grPaint, viewMatrix, |
| mf, style, |
| path, pathIsMutable); |
| } else { |
| renderTargetContext->drawPath(clip, grPaint, viewMatrix, *path, style); |
| } |
| } |
