diff options
Diffstat (limited to 'layout/svg/nsSVGMaskFrame.cpp')
| -rw-r--r-- | layout/svg/nsSVGMaskFrame.cpp | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/layout/svg/nsSVGMaskFrame.cpp b/layout/svg/nsSVGMaskFrame.cpp new file mode 100644 index 000000000..b8e4b32ae --- /dev/null +++ b/layout/svg/nsSVGMaskFrame.cpp @@ -0,0 +1,403 @@ +/* -*- 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); +} |