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91b071ed14
gfx::Color is currently misused in many places. The DrawTargets expect the color space to be in device space, e.g. what we are actually going to draw using. Everything sitting above generally deals with sRGB, as specified in CSS. Sometimes we missed the conversion from sRGB to device space when issuing draw calls, and similarly sometimes we converted the color to device space twice. This patch splits the type in two. sRGBColor and DeviceColor now represent sRGB and device color spaces respectively. DrawTarget only accepts DeviceColor, and one can get a DeviceColor from an sRGBColor via the ToDeviceColor helper API. The reftests now pass with color management enabled for everything (e.g. CSS) instead of just tagged raster images. There will be a follow up patch to enable color management everywhere by default on all supported platforms. Differential Revision: https://phabricator.services.mozilla.com/D64771 --HG-- extra : moz-landing-system : lando
240 lines
9.5 KiB
C++
240 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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#define _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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#include "2D.h"
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#include "cairo.h"
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#include "PathCairo.h"
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#include <vector>
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namespace mozilla {
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namespace gfx {
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class SourceSurfaceCairo;
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class GradientStopsCairo : public GradientStops {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsCairo, override)
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GradientStopsCairo(GradientStop* aStops, uint32_t aNumStops,
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ExtendMode aExtendMode)
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: mExtendMode(aExtendMode) {
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for (uint32_t i = 0; i < aNumStops; ++i) {
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mStops.push_back(aStops[i]);
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}
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}
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virtual ~GradientStopsCairo() = default;
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const std::vector<GradientStop>& GetStops() const { return mStops; }
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ExtendMode GetExtendMode() const { return mExtendMode; }
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virtual BackendType GetBackendType() const override {
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return BackendType::CAIRO;
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}
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private:
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std::vector<GradientStop> mStops;
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ExtendMode mExtendMode;
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};
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class DrawTargetCairo final : public DrawTarget {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetCairo, override)
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friend class BorrowedCairoContext;
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friend class BorrowedXlibDrawable;
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DrawTargetCairo();
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virtual ~DrawTargetCairo();
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virtual bool IsValid() const override;
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virtual DrawTargetType GetType() const override;
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virtual BackendType GetBackendType() const override {
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return BackendType::CAIRO;
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}
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virtual already_AddRefed<SourceSurface> Snapshot() override;
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virtual IntSize GetSize() const override;
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virtual bool IsCurrentGroupOpaque() override;
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virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA) override;
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virtual bool LockBits(uint8_t** aData, IntSize* aSize, int32_t* aStride,
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SurfaceFormat* aFormat,
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IntPoint* aOrigin = nullptr) override;
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virtual void ReleaseBits(uint8_t* aData) override;
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virtual void Flush() override;
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virtual void DrawSurface(
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SourceSurface* aSurface, const Rect& aDest, const Rect& aSource,
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const DrawSurfaceOptions& aSurfOptions = DrawSurfaceOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void DrawFilter(FilterNode* aNode, const Rect& aSourceRect,
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const Point& aDestPoint,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void DrawSurfaceWithShadow(SourceSurface* aSurface,
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const Point& aDest,
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const DeviceColor& aColor,
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const Point& aOffset, Float aSigma,
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CompositionOp aOperator) override;
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virtual void ClearRect(const Rect& aRect) override;
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virtual void CopySurface(SourceSurface* aSurface, const IntRect& aSourceRect,
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const IntPoint& aDestination) override;
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virtual void CopyRect(const IntRect& aSourceRect,
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const IntPoint& aDestination) override;
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virtual void FillRect(const Rect& aRect, const Pattern& aPattern,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void StrokeRect(const Rect& aRect, const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void StrokeLine(const Point& aStart, const Point& aEnd,
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const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void Stroke(const Path* aPath, const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions = StrokeOptions(),
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void Fill(const Path* aPath, const Pattern& aPattern,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void FillGlyphs(ScaledFont* aFont, const GlyphBuffer& aBuffer,
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const Pattern& aPattern,
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const DrawOptions& aOptions) override;
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virtual void Mask(const Pattern& aSource, const Pattern& aMask,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual void MaskSurface(
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const Pattern& aSource, SourceSurface* aMask, Point aOffset,
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const DrawOptions& aOptions = DrawOptions()) override;
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virtual bool Draw3DTransformedSurface(SourceSurface* aSurface,
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const Matrix4x4& aMatrix) override;
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virtual void PushClip(const Path* aPath) override;
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virtual void PushClipRect(const Rect& aRect) override;
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virtual void PopClip() override;
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virtual void PushLayer(bool aOpaque, Float aOpacity, SourceSurface* aMask,
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const Matrix& aMaskTransform,
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const IntRect& aBounds = IntRect(),
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bool aCopyBackground = false) override;
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virtual void PopLayer() override;
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virtual already_AddRefed<PathBuilder> CreatePathBuilder(
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FillRule aFillRule = FillRule::FILL_WINDING) const override;
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virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(
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unsigned char* aData, const IntSize& aSize, int32_t aStride,
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SurfaceFormat aFormat) const override;
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virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(
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SourceSurface* aSurface) const override;
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virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromNativeSurface(
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const NativeSurface& aSurface) const override;
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virtual already_AddRefed<DrawTarget> CreateSimilarDrawTarget(
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const IntSize& aSize, SurfaceFormat aFormat) const override;
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virtual already_AddRefed<DrawTarget> CreateShadowDrawTarget(
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const IntSize& aSize, SurfaceFormat aFormat, float aSigma) const override;
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virtual RefPtr<DrawTarget> CreateClippedDrawTarget(
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const Rect& aBounds, SurfaceFormat aFormat) override;
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virtual already_AddRefed<GradientStops> CreateGradientStops(
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GradientStop* aStops, uint32_t aNumStops,
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ExtendMode aExtendMode = ExtendMode::CLAMP) const override;
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virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override;
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virtual void* GetNativeSurface(NativeSurfaceType aType) override;
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bool Init(cairo_surface_t* aSurface, const IntSize& aSize,
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SurfaceFormat* aFormat = nullptr);
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bool Init(const IntSize& aSize, SurfaceFormat aFormat);
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bool Init(unsigned char* aData, const IntSize& aSize, int32_t aStride,
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SurfaceFormat aFormat);
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virtual void SetTransform(const Matrix& aTransform) override;
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virtual void DetachAllSnapshots() override { MarkSnapshotIndependent(); }
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// Call to set up aContext for drawing (with the current transform, etc).
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// Pass the path you're going to be using if you have one.
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// Implicitly calls WillChange(aPath).
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void PrepareForDrawing(cairo_t* aContext, const Path* aPath = nullptr);
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static cairo_surface_t* GetDummySurface();
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// Cairo hardcodes this as its maximum surface size.
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static size_t GetMaxSurfaceSize() { return 32766; }
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private: // methods
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// Init cairo surface without doing a cairo_surface_reference() call.
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bool InitAlreadyReferenced(cairo_surface_t* aSurface, const IntSize& aSize,
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SurfaceFormat* aFormat = nullptr);
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enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
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void DrawPattern(const Pattern& aPattern, const StrokeOptions& aStrokeOptions,
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const DrawOptions& aOptions, DrawPatternType aDrawType,
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bool aPathBoundsClip = false);
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void CopySurfaceInternal(cairo_surface_t* aSurface, const IntRect& aSource,
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const IntPoint& aDest);
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Rect GetUserSpaceClip() const;
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// Call before you make any changes to the backing surface with which this
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// context is associated. Pass the path you're going to be using if you have
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// one.
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void WillChange(const Path* aPath = nullptr);
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// Call if there is any reason to disassociate the snapshot from this draw
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// target; for example, because we're going to be destroyed.
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void MarkSnapshotIndependent();
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// If the current operator is "source" then clear the destination before we
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// draw into it, to simulate the effect of an unbounded source operator.
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void ClearSurfaceForUnboundedSource(const CompositionOp& aOperator);
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// Set the Cairo context font options according to the current draw target
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// font state.
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void SetFontOptions(cairo_antialias_t aAAMode = CAIRO_ANTIALIAS_DEFAULT);
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private: // data
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cairo_t* mContext;
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cairo_surface_t* mSurface;
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IntSize mSize;
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bool mTransformSingular;
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uint8_t* mLockedBits;
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cairo_font_options_t* mFontOptions;
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struct PushedLayer {
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PushedLayer(Float aOpacity, bool aWasPermittingSubpixelAA)
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: mOpacity(aOpacity),
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mMaskPattern(nullptr),
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mWasPermittingSubpixelAA(aWasPermittingSubpixelAA) {}
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Float mOpacity;
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cairo_pattern_t* mMaskPattern;
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bool mWasPermittingSubpixelAA;
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};
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std::vector<PushedLayer> mPushedLayers;
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// The latest snapshot of this surface. This needs to be told when this
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// target is modified. We keep it alive as a cache.
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RefPtr<SourceSurfaceCairo> mSnapshot;
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static cairo_surface_t* mDummySurface;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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