| /* | |
| * 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 "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(GrDrawContext* drawContext, | |
| 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()); | |
| grp->addCoverageFragmentProcessor(GrSimpleTextureEffect::Make(mask, nullptr, matrix, | |
| kDevice_GrCoordSet)); | |
| SkMatrix inverse; | |
| if (!viewMatrix.invert(&inverse)) { | |
| return false; | |
| } | |
| drawContext->fillRectWithLocalMatrix(clip, *grp, SkMatrix::I(), | |
| SkRect::Make(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, | |
| 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; | |
| SkAutoTUnref<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(drawContext, clipData, viewMatrix, dstM.fBounds, grp, texture); | |
| } | |
| // 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<GrDrawContext> drawContext(context->makeDrawContextWithFallback(SkBackingFit::kApprox, | |
| maskRect.width(), | |
| maskRect.height(), | |
| kAlpha_8_GrPixelConfig, | |
| nullptr, | |
| sampleCnt)); | |
| if (!drawContext) { | |
| return nullptr; | |
| } | |
| drawContext->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)); | |
| drawContext->drawPath(clip, tempPaint, translate, devPath, GrStyle(fillOrHairline)); | |
| return drawContext->asTexture();; | |
| } | |
| static void draw_path_with_mask_filter(GrContext* context, | |
| GrDrawContext* drawContext, | |
| 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(drawContext->width(), drawContext->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(), | |
| drawContext, | |
| 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(), | |
| drawContext->numColorSamples())); | |
| if (mask) { | |
| GrTexture* filtered; | |
| if (maskFilter->filterMaskGPU(mask.get(), viewMatrix, finalIRect, &filtered)) { | |
| // filterMaskGPU gives us ownership of a ref to the result | |
| SkAutoTUnref<GrTexture> atu(filtered); | |
| if (draw_mask(drawContext, clip, viewMatrix, finalIRect, paint, filtered)) { | |
| // This path is completely drawn | |
| return; | |
| } | |
| } | |
| } | |
| } | |
| sw_draw_with_mask_filter(drawContext, context->textureProvider(), | |
| clip, viewMatrix, *path, | |
| maskFilter, clipBounds, paint, fillOrHairline); | |
| } | |
| void GrBlurUtils::drawPathWithMaskFilter(GrContext* context, | |
| GrDrawContext* drawContext, | |
| 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, drawContext, clip, paint, viewMatrix, mf, | |
| style, &path, pathIsMutable); | |
| } | |
| void GrBlurUtils::drawPathWithMaskFilter(GrContext* context, | |
| GrDrawContext* drawContext, | |
| 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, drawContext, paint, viewMatrix, &grPaint)) { | |
| return; | |
| } | |
| if (paint.getMaskFilter()) { | |
| draw_path_with_mask_filter(context, drawContext, clip, &grPaint, viewMatrix, | |
| paint.getMaskFilter(), style, | |
| path, pathIsMutable); | |
| } else { | |
| drawContext->drawPath(clip, grPaint, viewMatrix, *path, style); | |
| } | |
| } |