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Bug 1228280 - Part 5. Paint multiple SVG and image masks;
MozReview-Commit-ID: FOgcnR9cYlH
This commit is contained in:
CJKu
parent
936ab8c243
commit
27969c0e19
@ -413,100 +413,108 @@ static bool
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HasMaskToDraw(const nsStyleSVGReset* aSVGReset,
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nsSVGEffects::EffectProperties& aEffectProperties)
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{
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bool isOK = true;
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// Keep moving forward even if svgMaskFrame is nullptr or isOK is false.
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// This source is not a svg mask, but it still can be a correct mask image.
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nsSVGMaskFrame *svgMaskFrame = aEffectProperties.GetFirstMaskFrame(&isOK);
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nsTArray<nsSVGMaskFrame*> svgMaskFrames = aEffectProperties.GetMaskFrames();
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for (int i = svgMaskFrames.Length() - 1; i >= 0 ; i--) {
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nsSVGMaskFrame *maskFrame = svgMaskFrames[i];
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// hasMaskToDraw is true means we have at least one drawable mask resource.
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// We need to apply mask only if hasMaskToDraw is true.
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bool hasMaskToDraw = (svgMaskFrame != nullptr);
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if (!hasMaskToDraw) {
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NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, aSVGReset->mMask) {
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if (!aSVGReset->mMask.mLayers[i].mImage.IsEmpty()) {
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hasMaskToDraw = true;
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break;
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}
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// We found a SVG mask or an image mask.
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if (maskFrame || !aSVGReset->mMask.mLayers[i].mImage.IsEmpty()) {
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return true;
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}
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}
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return hasMaskToDraw;
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return false;
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}
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static void
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GenerateMaskSurface(const nsSVGIntegrationUtils::PaintFramesParams& aParams,
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float aOpacity, nsStyleContext* aSC,
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nsSVGEffects::EffectProperties& aEffectProperties,
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gfxMatrix aOriginMatrix, Matrix& aOutMaskTransform,
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const gfxPoint& aOffest, Matrix& aOutMaskTransform,
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RefPtr<SourceSurface>& aOutMaskSurface)
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{
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const nsStyleSVGReset *svgReset = aSC->StyleSVGReset();
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MOZ_ASSERT(HasMaskToDraw(svgReset, aEffectProperties));
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// Keep moving forward even if svgMaskFrame is nullptr.
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// This source is not a svg mask, but it still can be a correct mask image.
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nsSVGMaskFrame *svgMaskFrame = aEffectProperties.GetFirstMaskFrame();
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nsTArray<nsSVGMaskFrame *> svgMaskFrames = aEffectProperties.GetMaskFrames();
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MOZ_ASSERT(svgMaskFrames.Length() == svgReset->mMask.mImageCount);
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gfxMatrix cssPxToDevPxMatrix =
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nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(aParams.frame);
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gfxContext& ctx = aParams.ctx;
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ctx.Save();
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ctx.SetMatrix(gfxMatrix());
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gfxRect clipExtents = ctx.GetClipExtents();
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IntRect maskSurfaceRect = RoundedOut(ToRect(clipExtents));
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ctx.Restore();
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if (svgMaskFrame) {
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gfxMatrix cssPxToDevPxMatrix =
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nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(aParams.frame);
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// Mask composition result on CoreGraphic::A8 surface is not correct
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// when mask-mode is not add(source over). Switch to skia when CG backend
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// detected.
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RefPtr<DrawTarget> maskDT =
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(ctx.GetDrawTarget()->GetBackendType() == BackendType::COREGRAPHICS)
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? Factory::CreateDrawTarget(BackendType::SKIA, maskSurfaceRect.Size(),
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SurfaceFormat::A8)
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: ctx.GetDrawTarget()->CreateSimilarDrawTarget(maskSurfaceRect.Size(),
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SurfaceFormat::A8);
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RefPtr<gfxContext> maskContext = gfxContext::ForDrawTarget(maskDT);
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// Generate aOutMaskSurface from a SVG mask.
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aOutMaskSurface = svgMaskFrame->GetMaskForMaskedFrame(&ctx,
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aParams.frame,
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cssPxToDevPxMatrix,
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aOpacity,
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&aOutMaskTransform,
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svgReset->mMask.mLayers[0].mMaskMode);
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} else {
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// Create maskSuface.
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gfxRect clipRect = ctx.GetClipExtents();
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{
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gfxContextMatrixAutoSaveRestore matRestore(&ctx);
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// Set ctx's matrix on maskContext, offset by the maskSurfaceRect's position.
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// This makes sure that we combine the masks in device space.
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gfxMatrix maskSurfaceMatrix =
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ctx.CurrentMatrix() * gfxMatrix::Translation(-maskSurfaceRect.TopLeft());
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maskContext->SetMatrix(maskSurfaceMatrix);
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ctx.SetMatrix(gfxMatrix());
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clipRect = ctx.GetClipExtents();
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// Multiple SVG masks interleave with image mask. Paint each layer onto maskDT
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// one at a time.
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for (int i = svgMaskFrames.Length() - 1; i >= 0 ; i--) {
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nsSVGMaskFrame *maskFrame = svgMaskFrames[i];
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// maskFrame != nullptr means we get a SVG mask.
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// maskFrame == nullptr means we get an image mask.
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if (maskFrame) {
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Matrix svgMaskMatrix;
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RefPtr<SourceSurface> svgMask =
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maskFrame->GetMaskForMaskedFrame(maskContext, aParams.frame,
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cssPxToDevPxMatrix, aOpacity,
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&svgMaskMatrix,
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svgReset->mMask.mLayers[i].mMaskMode);
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if (svgMask) {
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gfxContextMatrixAutoSaveRestore matRestore(maskContext);
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maskContext->Multiply(ThebesMatrix(svgMaskMatrix));
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Rect drawRect = IntRectToRect(IntRect(IntPoint(0, 0), svgMask->GetSize()));
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maskDT->DrawSurface(svgMask, drawRect, drawRect);
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}
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} else {
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gfxContextMatrixAutoSaveRestore matRestore(maskContext);
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maskContext->Multiply(gfxMatrix::Translation(-aOffest));
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CompositionOp compositionOp =
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nsCSSRendering::GetGFXCompositeMode(svgReset->mMask.mLayers[i].mComposite);
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nsRenderingContext rc(maskContext);
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nsCSSRendering::PaintBGParams params =
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nsCSSRendering::PaintBGParams::ForSingleLayer(*aParams.frame->PresContext(),
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rc, aParams.dirtyRect,
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aParams.borderArea,
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aParams.frame,
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aParams.builder->GetBackgroundPaintFlags() |
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nsCSSRendering::PAINTBG_MASK_IMAGE,
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i, compositionOp);
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// FIXME We should use the return value, see bug 1258510.
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Unused << nsCSSRendering::PaintBackgroundWithSC(params, aSC,
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*aParams.frame->StyleBorder());
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}
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IntRect drawRect = RoundedOut(ToRect(clipRect));
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// Mask composition result on CoreGraphic::A8 surface is not correct
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// when mask-mode is not add(source over). Switch to skia when CG backend
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// detected.
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RefPtr<DrawTarget> targetDT =
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(ctx.GetDrawTarget()->GetBackendType() == BackendType::COREGRAPHICS) ?
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Factory::CreateDrawTarget(BackendType::SKIA, drawRect.Size(),
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SurfaceFormat::A8) :
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ctx.GetDrawTarget()->CreateSimilarDrawTarget(drawRect.Size(),
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SurfaceFormat::A8);
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if (!targetDT || !targetDT->IsValid()) {
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return;
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}
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RefPtr<gfxContext> target = gfxContext::ForDrawTarget(targetDT);
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MOZ_ASSERT(target); // alrady checked the draw target above
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target->SetMatrix(aOriginMatrix * gfxMatrix::Translation(-drawRect.TopLeft()));
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// Compose all mask-images onto aOutMaskSurface.
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nsRenderingContext rc(target);
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nsCSSRendering::PaintBGParams params =
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nsCSSRendering::PaintBGParams::ForAllLayers(*aParams.frame->PresContext(),
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rc, aParams.dirtyRect,
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aParams.borderArea,
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aParams.frame,
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aParams.builder->GetBackgroundPaintFlags() |
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nsCSSRendering::PAINTBG_MASK_IMAGE);
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// FIXME We should use the return value, see bug 1258510.
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Unused << nsCSSRendering::PaintBackgroundWithSC(params, aSC,
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*aParams.frame->StyleBorder());
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aOutMaskSurface = targetDT->Snapshot();
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// Compute mask transform.
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Matrix mat = ToMatrix(ctx.CurrentMatrix());
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mat.Invert();
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aOutMaskTransform = Matrix::Translation(drawRect.x, drawRect.y) * mat;
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}
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aOutMaskTransform = ToMatrix(maskSurfaceMatrix);
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if (!aOutMaskTransform.Invert()) {
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return;
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}
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aOutMaskSurface = maskDT->Snapshot();
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}
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void
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@ -632,7 +640,7 @@ nsSVGIntegrationUtils::PaintFramesWithEffects(const PaintFramesParams& aParams)
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if (hasMaskToDraw) {
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GenerateMaskSurface(aParams, opacity, firstFrame->StyleContext(),
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effectProperties, matrixAutoSaveRestore.Matrix(),
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effectProperties, devPixelOffsetToUserSpace,
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maskTransform, maskSurface);
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}
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