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-rw-r--r--layout/svg/nsSVGMaskFrame.cpp403
1 files changed, 403 insertions, 0 deletions
diff --git a/layout/svg/nsSVGMaskFrame.cpp b/layout/svg/nsSVGMaskFrame.cpp
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+++ b/layout/svg/nsSVGMaskFrame.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Main header first:
+#include "nsSVGMaskFrame.h"
+
+// Keep others in (case-insensitive) order:
+#include "gfx2DGlue.h"
+#include "gfxContext.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "nsSVGEffects.h"
+#include "mozilla/dom/SVGMaskElement.h"
+#ifdef BUILD_ARM_NEON
+#include "mozilla/arm.h"
+#include "nsSVGMaskFrameNEON.h"
+#endif
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+
+// c = n / 255
+// c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4)) * 255 + 0.5
+static const uint8_t gsRGBToLinearRGBMap[256] = {
+ 0, 0, 0, 0, 0, 0, 0, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 2, 2, 2, 2, 2, 2,
+ 2, 2, 3, 3, 3, 3, 3, 3,
+ 4, 4, 4, 4, 4, 5, 5, 5,
+ 5, 6, 6, 6, 6, 7, 7, 7,
+ 8, 8, 8, 8, 9, 9, 9, 10,
+ 10, 10, 11, 11, 12, 12, 12, 13,
+ 13, 13, 14, 14, 15, 15, 16, 16,
+ 17, 17, 17, 18, 18, 19, 19, 20,
+ 20, 21, 22, 22, 23, 23, 24, 24,
+ 25, 25, 26, 27, 27, 28, 29, 29,
+ 30, 30, 31, 32, 32, 33, 34, 35,
+ 35, 36, 37, 37, 38, 39, 40, 41,
+ 41, 42, 43, 44, 45, 45, 46, 47,
+ 48, 49, 50, 51, 51, 52, 53, 54,
+ 55, 56, 57, 58, 59, 60, 61, 62,
+ 63, 64, 65, 66, 67, 68, 69, 70,
+ 71, 72, 73, 74, 76, 77, 78, 79,
+ 80, 81, 82, 84, 85, 86, 87, 88,
+ 90, 91, 92, 93, 95, 96, 97, 99,
+100, 101, 103, 104, 105, 107, 108, 109,
+111, 112, 114, 115, 116, 118, 119, 121,
+122, 124, 125, 127, 128, 130, 131, 133,
+134, 136, 138, 139, 141, 142, 144, 146,
+147, 149, 151, 152, 154, 156, 157, 159,
+161, 163, 164, 166, 168, 170, 171, 173,
+175, 177, 179, 181, 183, 184, 186, 188,
+190, 192, 194, 196, 198, 200, 202, 204,
+206, 208, 210, 212, 214, 216, 218, 220,
+222, 224, 226, 229, 231, 233, 235, 237,
+239, 242, 244, 246, 248, 250, 253, 255
+};
+
+static void
+ComputesRGBLuminanceMask(const uint8_t *aSourceData,
+ int32_t aSourceStride,
+ uint8_t *aDestData,
+ int32_t aDestStride,
+ const IntSize &aSize,
+ float aOpacity)
+{
+#ifdef BUILD_ARM_NEON
+ if (mozilla::supports_neon()) {
+ ComputesRGBLuminanceMask_NEON(aSourceData, aSourceStride,
+ aDestData, aDestStride,
+ aSize, aOpacity);
+ return;
+ }
+#endif
+
+ int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
+ int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
+ int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
+ int32_t sourceOffset = aSourceStride - 4 * aSize.width;
+ const uint8_t *sourcePixel = aSourceData;
+ int32_t destOffset = aDestStride - aSize.width;
+ uint8_t *destPixel = aDestData;
+
+ for (int32_t y = 0; y < aSize.height; y++) {
+ for (int32_t x = 0; x < aSize.width; x++) {
+ uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
+
+ if (a) {
+ *destPixel = (redFactor * sourcePixel[GFX_ARGB32_OFFSET_R] +
+ greenFactor * sourcePixel[GFX_ARGB32_OFFSET_G] +
+ blueFactor * sourcePixel[GFX_ARGB32_OFFSET_B]) >> 8;
+ } else {
+ *destPixel = 0;
+ }
+ sourcePixel += 4;
+ destPixel++;
+ }
+ sourcePixel += sourceOffset;
+ destPixel += destOffset;
+ }
+}
+
+static void
+ComputeLinearRGBLuminanceMask(const uint8_t *aSourceData,
+ int32_t aSourceStride,
+ uint8_t *aDestData,
+ int32_t aDestStride,
+ const IntSize &aSize,
+ float aOpacity)
+{
+ int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
+ int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
+ int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
+ int32_t sourceOffset = aSourceStride - 4 * aSize.width;
+ const uint8_t *sourcePixel = aSourceData;
+ int32_t destOffset = aDestStride - aSize.width;
+ uint8_t *destPixel = aDestData;
+
+ for (int32_t y = 0; y < aSize.height; y++) {
+ for (int32_t x = 0; x < aSize.width; x++) {
+ uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
+
+ // unpremultiply
+ if (a) {
+ if (a == 255) {
+ /* sRGB -> linearRGB -> intensity */
+ *destPixel =
+ static_cast<uint8_t>
+ ((gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_R]] *
+ redFactor +
+ gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_G]] *
+ greenFactor +
+ gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_B]] *
+ blueFactor) >> 8);
+ } else {
+ uint8_t tempPixel[4];
+ tempPixel[GFX_ARGB32_OFFSET_B] =
+ (255 * sourcePixel[GFX_ARGB32_OFFSET_B]) / a;
+ tempPixel[GFX_ARGB32_OFFSET_G] =
+ (255 * sourcePixel[GFX_ARGB32_OFFSET_G]) / a;
+ tempPixel[GFX_ARGB32_OFFSET_R] =
+ (255 * sourcePixel[GFX_ARGB32_OFFSET_R]) / a;
+
+ /* sRGB -> linearRGB -> intensity */
+ *destPixel =
+ static_cast<uint8_t>
+ (((gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_R]] *
+ redFactor +
+ gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_G]] *
+ greenFactor +
+ gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_B]] *
+ blueFactor) >> 8) * (a / 255.0f));
+ }
+ } else {
+ *destPixel = 0;
+ }
+ sourcePixel += 4;
+ destPixel++;
+ }
+ sourcePixel += sourceOffset;
+ destPixel += destOffset;
+ }
+}
+
+static void
+ComputeAlphaMask(const uint8_t *aSourceData,
+ int32_t aSourceStride,
+ uint8_t *aDestData,
+ int32_t aDestStride,
+ const IntSize &aSize,
+ float aOpacity)
+{
+ int32_t sourceOffset = aSourceStride - 4 * aSize.width;
+ const uint8_t *sourcePixel = aSourceData;
+ int32_t destOffset = aDestStride - aSize.width;
+ uint8_t *destPixel = aDestData;
+
+ for (int32_t y = 0; y < aSize.height; y++) {
+ for (int32_t x = 0; x < aSize.width; x++) {
+ *destPixel = sourcePixel[GFX_ARGB32_OFFSET_A] * aOpacity;
+ sourcePixel += 4;
+ destPixel++;
+ }
+ sourcePixel += sourceOffset;
+ destPixel += destOffset;
+ }
+}
+
+//----------------------------------------------------------------------
+// Implementation
+
+nsIFrame*
+NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsSVGMaskFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGMaskFrame)
+
+already_AddRefed<SourceSurface>
+nsSVGMaskFrame::GetMaskForMaskedFrame(gfxContext* aContext,
+ nsIFrame* aMaskedFrame,
+ const gfxMatrix &aMatrix,
+ float aOpacity,
+ Matrix* aMaskTransform,
+ uint8_t aMaskOp)
+{
+ // If the flag is set when we get here, it means this mask frame
+ // has already been used painting the current mask, and the document
+ // has a mask reference loop.
+ if (mInUse) {
+ NS_WARNING("Mask loop detected!");
+ return nullptr;
+ }
+ AutoMaskReferencer maskRef(this);
+
+ gfxRect maskArea = GetMaskArea(aMaskedFrame);
+
+ // Get the clip extents in device space:
+ // Minimizing the mask surface extents (using both the current clip extents
+ // and maskArea) is important for performance.
+ aContext->Save();
+ nsSVGUtils::SetClipRect(aContext, aMatrix, maskArea);
+ aContext->SetMatrix(gfxMatrix());
+ gfxRect maskSurfaceRect = aContext->GetClipExtents();
+ maskSurfaceRect.RoundOut();
+ aContext->Restore();
+
+ bool resultOverflows;
+ IntSize maskSurfaceSize =
+ nsSVGUtils::ConvertToSurfaceSize(maskSurfaceRect.Size(), &resultOverflows);
+
+ if (resultOverflows || maskSurfaceSize.IsEmpty()) {
+ // XXXjwatt we should return an empty surface so we don't paint aMaskedFrame!
+ return nullptr;
+ }
+
+ RefPtr<DrawTarget> maskDT =
+ Factory::CreateDrawTarget(BackendType::CAIRO, maskSurfaceSize,
+ SurfaceFormat::B8G8R8A8);
+ if (!maskDT || !maskDT->IsValid()) {
+ return nullptr;
+ }
+
+ gfxMatrix maskSurfaceMatrix =
+ aContext->CurrentMatrix() * gfxMatrix::Translation(-maskSurfaceRect.TopLeft());
+
+ RefPtr<gfxContext> tmpCtx = gfxContext::CreateOrNull(maskDT);
+ MOZ_ASSERT(tmpCtx); // already checked the draw target above
+ tmpCtx->SetMatrix(maskSurfaceMatrix);
+
+ mMatrixForChildren = GetMaskTransform(aMaskedFrame) * aMatrix;
+ for (nsIFrame* kid = mFrames.FirstChild(); kid;
+ kid = kid->GetNextSibling()) {
+ // The CTM of each frame referencing us can be different
+ nsISVGChildFrame* SVGFrame = do_QueryFrame(kid);
+ if (SVGFrame) {
+ SVGFrame->NotifySVGChanged(nsISVGChildFrame::TRANSFORM_CHANGED);
+ }
+ gfxMatrix m = mMatrixForChildren;
+ if (kid->GetContent()->IsSVGElement()) {
+ m = static_cast<nsSVGElement*>(kid->GetContent())->
+ PrependLocalTransformsTo(m, eUserSpaceToParent);
+ }
+ Unused << nsSVGUtils::PaintFrameWithEffects(kid, *tmpCtx, m);
+ }
+
+ RefPtr<SourceSurface> maskSnapshot = maskDT->Snapshot();
+ if (!maskSnapshot) {
+ return nullptr;
+ }
+ RefPtr<DataSourceSurface> maskSurface = maskSnapshot->GetDataSurface();
+ DataSourceSurface::MappedSurface map;
+ if (!maskSurface->Map(DataSourceSurface::MapType::READ, &map)) {
+ return nullptr;
+ }
+
+ // Create alpha channel mask for output
+ RefPtr<DataSourceSurface> destMaskSurface =
+ Factory::CreateDataSourceSurface(maskSurfaceSize, SurfaceFormat::A8);
+ if (!destMaskSurface) {
+ return nullptr;
+ }
+ DataSourceSurface::MappedSurface destMap;
+ if (!destMaskSurface->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
+ return nullptr;
+ }
+
+ uint8_t maskType;
+ if (aMaskOp == NS_STYLE_MASK_MODE_MATCH_SOURCE) {
+ maskType = StyleSVGReset()->mMaskType;
+ } else {
+ maskType = aMaskOp == NS_STYLE_MASK_MODE_LUMINANCE ?
+ NS_STYLE_MASK_TYPE_LUMINANCE : NS_STYLE_MASK_TYPE_ALPHA;
+ }
+
+ if (maskType == NS_STYLE_MASK_TYPE_LUMINANCE) {
+ if (StyleSVG()->mColorInterpolation ==
+ NS_STYLE_COLOR_INTERPOLATION_LINEARRGB) {
+ ComputeLinearRGBLuminanceMask(map.mData, map.mStride,
+ destMap.mData, destMap.mStride,
+ maskSurfaceSize, aOpacity);
+ } else {
+ ComputesRGBLuminanceMask(map.mData, map.mStride,
+ destMap.mData, destMap.mStride,
+ maskSurfaceSize, aOpacity);
+ }
+ } else {
+ ComputeAlphaMask(map.mData, map.mStride,
+ destMap.mData, destMap.mStride,
+ maskSurfaceSize, aOpacity);
+ }
+
+ maskSurface->Unmap();
+ destMaskSurface->Unmap();
+
+ // Moz2D transforms in the opposite direction to Thebes
+ if (!maskSurfaceMatrix.Invert()) {
+ return nullptr;
+ }
+
+ *aMaskTransform = ToMatrix(maskSurfaceMatrix);
+ return destMaskSurface.forget();
+}
+
+gfxRect
+nsSVGMaskFrame::GetMaskArea(nsIFrame* aMaskedFrame)
+{
+ SVGMaskElement *maskElem = static_cast<SVGMaskElement*>(mContent);
+
+ uint16_t units =
+ maskElem->mEnumAttributes[SVGMaskElement::MASKUNITS].GetAnimValue();
+ gfxRect bbox;
+ if (units == SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
+ bbox = nsSVGUtils::GetBBox(aMaskedFrame);
+ }
+
+ // Bounds in the user space of aMaskedFrame
+ gfxRect maskArea = nsSVGUtils::GetRelativeRect(units,
+ &maskElem->mLengthAttributes[SVGMaskElement::ATTR_X],
+ bbox, aMaskedFrame);
+
+ return maskArea;
+}
+
+nsresult
+nsSVGMaskFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ if (aNameSpaceID == kNameSpaceID_None &&
+ (aAttribute == nsGkAtoms::x ||
+ aAttribute == nsGkAtoms::y ||
+ aAttribute == nsGkAtoms::width ||
+ aAttribute == nsGkAtoms::height||
+ aAttribute == nsGkAtoms::maskUnits ||
+ aAttribute == nsGkAtoms::maskContentUnits)) {
+ nsSVGEffects::InvalidateDirectRenderingObservers(this);
+ }
+
+ return nsSVGContainerFrame::AttributeChanged(aNameSpaceID,
+ aAttribute, aModType);
+}
+
+#ifdef DEBUG
+void
+nsSVGMaskFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow)
+{
+ NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::mask),
+ "Content is not an SVG mask");
+
+ nsSVGContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsIAtom *
+nsSVGMaskFrame::GetType() const
+{
+ return nsGkAtoms::svgMaskFrame;
+}
+
+gfxMatrix
+nsSVGMaskFrame::GetCanvasTM()
+{
+ return mMatrixForChildren;
+}
+
+gfxMatrix
+nsSVGMaskFrame::GetMaskTransform(nsIFrame* aMaskedFrame)
+{
+ SVGMaskElement *content = static_cast<SVGMaskElement*>(mContent);
+
+ nsSVGEnum* maskContentUnits =
+ &content->mEnumAttributes[SVGMaskElement::MASKCONTENTUNITS];
+
+ return nsSVGUtils::AdjustMatrixForUnits(gfxMatrix(), maskContentUnits,
+ aMaskedFrame);
+}