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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /gfx/thebes/gfxContext.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/thebes/gfxContext.h')
-rw-r--r-- | gfx/thebes/gfxContext.h | 811 |
1 files changed, 811 insertions, 0 deletions
diff --git a/gfx/thebes/gfxContext.h b/gfx/thebes/gfxContext.h new file mode 100644 index 0000000000..a6ebe76e7b --- /dev/null +++ b/gfx/thebes/gfxContext.h @@ -0,0 +1,811 @@ +/* -*- Mode: C++; tab-width: 20; 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/. */ + +#ifndef GFX_CONTEXT_H +#define GFX_CONTEXT_H + +#include "gfx2DGlue.h" +#include "gfxPattern.h" +#include "gfxUtils.h" +#include "nsTArray.h" + +#include "mozilla/EnumSet.h" +#include "mozilla/gfx/2D.h" + +typedef struct _cairo cairo_t; +class GlyphBufferAzure; + +namespace mozilla { +namespace gfx { +struct RectCornerRadii; +} // namespace gfx +namespace layout { +class TextDrawTarget; +} // namespace layout +} // namespace mozilla + +class ClipExporter; + +/* This class lives on the stack and allows gfxContext users to easily, and + * performantly get a gfx::Pattern to use for drawing in their current context. + */ +class PatternFromState { + public: + explicit PatternFromState(const gfxContext* aContext) + : mContext(aContext), mPattern(nullptr) {} + ~PatternFromState() { + if (mPattern) { + mPattern->~Pattern(); + } + } + + operator mozilla::gfx::Pattern&(); + + private: + mozilla::AlignedStorage2<mozilla::gfx::ColorPattern> mColorPattern; + + const gfxContext* mContext; + mozilla::gfx::Pattern* mPattern; +}; + +/** + * This is the main class for doing actual drawing. It is initialized using + * a surface and can be drawn on. It manages various state information like + * a current transformation matrix (CTM), a current path, current color, + * etc. + * + * All drawing happens by creating a path and then stroking or filling it. + * The functions like Rectangle and Arc do not do any drawing themselves. + * When a path is drawn (stroked or filled), it is filled/stroked with a + * pattern set by SetPattern or SetColor. + * + * Note that the gfxContext takes coordinates in device pixels, + * as opposed to app units. + */ +class gfxContext final { +#ifdef DEBUG +# define CURRENTSTATE_CHANGED() mAzureState.mContentChanged = true; +#else +# define CURRENTSTATE_CHANGED() +#endif + + typedef mozilla::gfx::BackendType BackendType; + typedef mozilla::gfx::CapStyle CapStyle; + typedef mozilla::gfx::CompositionOp CompositionOp; + typedef mozilla::gfx::DeviceColor DeviceColor; + typedef mozilla::gfx::DrawOptions DrawOptions; + typedef mozilla::gfx::DrawTarget DrawTarget; + typedef mozilla::gfx::JoinStyle JoinStyle; + typedef mozilla::gfx::FillRule FillRule; + typedef mozilla::gfx::Float Float; + typedef mozilla::gfx::Matrix Matrix; + typedef mozilla::gfx::Path Path; + typedef mozilla::gfx::Pattern Pattern; + typedef mozilla::gfx::Point Point; + typedef mozilla::gfx::Rect Rect; + typedef mozilla::gfx::RectCornerRadii RectCornerRadii; + typedef mozilla::gfx::Size Size; + + public: + /** + * Initialize this context from a DrawTarget, which must be non-null. + * Strips any transform from aTarget, unless aPreserveTransform is true. + * aTarget will be flushed in the gfxContext's destructor. + */ + MOZ_NONNULL(2) + explicit gfxContext(DrawTarget* aTarget, const Point& aDeviceOffset = Point()) + : mDT(aTarget) { + mAzureState.deviceOffset = aDeviceOffset; + mDT->SetTransform(GetDTTransform()); + } + + MOZ_NONNULL(2) + gfxContext(DrawTarget* aTarget, bool aPreserveTransform) : mDT(aTarget) { + if (aPreserveTransform) { + SetMatrix(aTarget->GetTransform()); + } else { + mDT->SetTransform(GetDTTransform()); + } + } + + ~gfxContext(); + + /** + * Initialize this context from a DrawTarget. + * Strips any transform from aTarget. + * aTarget will be flushed in the gfxContext's destructor. + * If aTarget is null or invalid, nullptr is returned. The caller + * is responsible for handling this scenario as appropriate. + */ + static mozilla::UniquePtr<gfxContext> CreateOrNull( + DrawTarget* aTarget, const Point& aDeviceOffset = Point()); + + DrawTarget* GetDrawTarget() const { return mDT; } + + /** + * Returns the DrawTarget if it's actually a TextDrawTarget. + */ + mozilla::layout::TextDrawTarget* GetTextDrawer() const; + + /** + ** State + **/ + // XXX document exactly what bits are saved + void Save(); + void Restore(); + + /** + ** Paths & Drawing + **/ + + /** + * Fill the current path according to the current settings. + * + * Does not consume the current path. + */ + void Fill() { Fill(PatternFromState(this)); } + void Fill(const Pattern& aPattern); + + /** + * Forgets the current path. + */ + void NewPath() { + mPath = nullptr; + mPathBuilder = nullptr; + mPathIsRect = false; + mTransformChanged = false; + } + + /** + * Returns the current path. + */ + already_AddRefed<Path> GetPath() { + EnsurePath(); + RefPtr<Path> path(mPath); + return path.forget(); + } + + /** + * Sets the given path as the current path. + */ + void SetPath(Path* path) { + MOZ_ASSERT(path->GetBackendType() == mDT->GetBackendType() || + path->GetBackendType() == BackendType::RECORDING || + (mDT->GetBackendType() == BackendType::DIRECT2D1_1 && + path->GetBackendType() == BackendType::DIRECT2D)); + mPath = path; + mPathBuilder = nullptr; + mPathIsRect = false; + mTransformChanged = false; + } + + /** + * Draws the rectangle given by rect. + */ + void Rectangle(const gfxRect& rect) { return Rectangle(rect, false); } + void SnappedRectangle(const gfxRect& rect) { return Rectangle(rect, true); } + + private: + void Rectangle(const gfxRect& rect, bool snapToPixels); + + public: + /** + ** Transformation Matrix manipulation + **/ + + /** + * Post-multiplies 'other' onto the current CTM, i.e. this + * matrix's transformation will take place before the previously set + * transformations. + */ + void Multiply(const gfxMatrix& aMatrix) { Multiply(ToMatrix(aMatrix)); } + void Multiply(const Matrix& aOther) { + CURRENTSTATE_CHANGED() + ChangeTransform(aOther * mAzureState.transform); + } + + /** + * Replaces the current transformation matrix with matrix. + */ + void SetMatrix(const Matrix& aMatrix) { + CURRENTSTATE_CHANGED() + ChangeTransform(aMatrix); + } + void SetMatrixDouble(const gfxMatrix& aMatrix) { + SetMatrix(ToMatrix(aMatrix)); + } + + void SetCrossProcessPaintScale(float aScale) { + MOZ_ASSERT(mCrossProcessPaintScale == 1.0f, + "Should only be initialized once"); + mCrossProcessPaintScale = aScale; + } + + float GetCrossProcessPaintScale() const { return mCrossProcessPaintScale; } + + /** + * Returns the current transformation matrix. + */ + Matrix CurrentMatrix() const { return mAzureState.transform; } + gfxMatrix CurrentMatrixDouble() const { + return ThebesMatrix(CurrentMatrix()); + } + + /** + * Converts a point from device to user coordinates using the inverse + * transformation matrix. + */ + gfxPoint DeviceToUser(const gfxPoint& aPoint) const { + return ThebesPoint( + mAzureState.transform.Inverse().TransformPoint(ToPoint(aPoint))); + } + + /** + * Converts a size from device to user coordinates. This does not apply + * translation components of the matrix. + */ + Size DeviceToUser(const Size& aSize) const { + return mAzureState.transform.Inverse().TransformSize(aSize); + } + + /** + * Converts a rectangle from device to user coordinates; this has the + * same effect as using DeviceToUser on both the rectangle's point and + * size. + */ + gfxRect DeviceToUser(const gfxRect& aRect) const { + return ThebesRect( + mAzureState.transform.Inverse().TransformBounds(ToRect(aRect))); + } + + /** + * Converts a point from user to device coordinates using the transformation + * matrix. + */ + gfxPoint UserToDevice(const gfxPoint& aPoint) const { + return ThebesPoint(mAzureState.transform.TransformPoint(ToPoint(aPoint))); + } + + /** + * Converts a size from user to device coordinates. This does not apply + * translation components of the matrix. + */ + Size UserToDevice(const Size& aSize) const { + const auto& mtx = mAzureState.transform; + return Size(aSize.width * mtx._11 + aSize.height * mtx._12, + aSize.width * mtx._21 + aSize.height * mtx._22); + } + + /** + * Converts a rectangle from user to device coordinates. The + * resulting rectangle is the minimum device-space rectangle that + * encloses the user-space rectangle given. + */ + gfxRect UserToDevice(const gfxRect& rect) const { + return ThebesRect(mAzureState.transform.TransformBounds(ToRect(rect))); + } + + /** + * Takes the given rect and tries to align it to device pixels. If + * this succeeds, the method will return true, and the rect will + * be in device coordinates (already transformed by the CTM). If it + * fails, the method will return false, and the rect will not be + * changed. + * + * aOptions parameter: + * If IgnoreScale is set, then snapping will take place even if the CTM + * has a scale applied. Snapping never takes place if there is a rotation + * in the CTM. + * + * If PrioritizeSize is set, the rect's dimensions will first be snapped + * and then its position aligned to device pixels, rather than snapping + * the position of each edge independently. + */ + enum class SnapOption : uint8_t { + IgnoreScale = 1, + PrioritizeSize = 2, + }; + using SnapOptions = mozilla::EnumSet<SnapOption>; + bool UserToDevicePixelSnapped(gfxRect& rect, SnapOptions aOptions = {}) const; + + /** + * Takes the given point and tries to align it to device pixels. If + * this succeeds, the method will return true, and the point will + * be in device coordinates (already transformed by the CTM). If it + * fails, the method will return false, and the point will not be + * changed. + * + * If ignoreScale is true, then snapping will take place even if + * the CTM has a scale applied. Snapping never takes place if + * there is a rotation in the CTM. + */ + bool UserToDevicePixelSnapped(gfxPoint& pt, bool ignoreScale = false) const; + + /** + ** Painting sources + **/ + + /** + * Set a solid color to use for drawing. This color is in the device color + * space and is not transformed. + */ + void SetDeviceColor(const DeviceColor& aColor) { + CURRENTSTATE_CHANGED() + mAzureState.pattern = nullptr; + mAzureState.color = aColor; + } + + /** + * Gets the current color. It's returned in the device color space. + * returns false if there is something other than a color + * set as the current source (pattern, surface, etc) + */ + bool GetDeviceColor(DeviceColor& aColorOut) const; + + /** + * Returns true if color is neither opaque nor transparent (i.e. alpha is not + * 0 or 1), and false otherwise. If true, aColorOut is set on output. + */ + bool HasNonOpaqueNonTransparentColor(DeviceColor& aColorOut) const { + return GetDeviceColor(aColorOut) && 0.f < aColorOut.a && aColorOut.a < 1.f; + } + + /** + * Set a solid color in the sRGB color space to use for drawing. + * If CMS is not enabled, the color is treated as a device-space color + * and this call is identical to SetDeviceColor(). + */ + void SetColor(const mozilla::gfx::sRGBColor& aColor) { + CURRENTSTATE_CHANGED() + mAzureState.pattern = nullptr; + mAzureState.color = ToDeviceColor(aColor); + } + + /** + * Uses a pattern for drawing. + */ + void SetPattern(gfxPattern* pattern) { + CURRENTSTATE_CHANGED() + mAzureState.patternTransformChanged = false; + mAzureState.pattern = pattern; + } + + /** + * Get the source pattern (solid color, normal pattern, surface, etc) + */ + already_AddRefed<gfxPattern> GetPattern() const; + + /** + ** Painting + **/ + /** + * Paints the current source surface/pattern everywhere in the current + * clip region. + */ + void Paint(Float alpha = 1.0) const; + + /** + ** Line Properties + **/ + + // Set the dash pattern, applying devPxScale to convert passed-in lengths + // to device pixels (used by the SVGUtils::SetupStrokeGeometry caller, + // which has the desired dash pattern in CSS px). + void SetDash(const Float* dashes, int ndash, Float offset, Float devPxScale); + + // Return true if dashing is set, false if it's not enabled or the + // context is in an error state. |offset| can be nullptr to mean + // "don't care". + bool CurrentDash(FallibleTArray<Float>& dashes, Float* offset) const; + + /** + * Sets the line width that's used for line drawing. + */ + void SetLineWidth(Float width) { + CURRENTSTATE_CHANGED() + mAzureState.strokeOptions.mLineWidth = width; + } + + /** + * Returns the currently set line width. + * + * @see SetLineWidth + */ + Float CurrentLineWidth() const { + return mAzureState.strokeOptions.mLineWidth; + } + + /** + * Sets the line caps, i.e. how line endings are drawn. + */ + void SetLineCap(CapStyle cap) { + CURRENTSTATE_CHANGED() + mAzureState.strokeOptions.mLineCap = cap; + } + CapStyle CurrentLineCap() const { return mAzureState.strokeOptions.mLineCap; } + + /** + * Sets the line join, i.e. how the connection between two lines is + * drawn. + */ + void SetLineJoin(JoinStyle join) { + CURRENTSTATE_CHANGED() + mAzureState.strokeOptions.mLineJoin = join; + } + JoinStyle CurrentLineJoin() const { + return mAzureState.strokeOptions.mLineJoin; + } + + void SetMiterLimit(Float limit) { + CURRENTSTATE_CHANGED() + mAzureState.strokeOptions.mMiterLimit = limit; + } + Float CurrentMiterLimit() const { + return mAzureState.strokeOptions.mMiterLimit; + } + + /** + * Sets the operator used for all further drawing. The operator affects + * how drawing something will modify the destination. For example, the + * OVER operator will do alpha blending of source and destination, while + * SOURCE will replace the destination with the source. + */ + void SetOp(CompositionOp aOp) { + CURRENTSTATE_CHANGED() + mAzureState.op = aOp; + } + CompositionOp CurrentOp() const { return mAzureState.op; } + + void SetAntialiasMode(mozilla::gfx::AntialiasMode aMode) { + CURRENTSTATE_CHANGED() + mAzureState.aaMode = aMode; + } + mozilla::gfx::AntialiasMode CurrentAntialiasMode() const { + return mAzureState.aaMode; + } + + /** + ** Clipping + **/ + + /** + * Clips all further drawing to the current path. + * This does not consume the current path. + */ + void Clip(); + + /** + * Helper functions that will create a rect path and call Clip(). + * Any current path will be destroyed by these functions! + */ + void Clip(const gfxRect& aRect) { Clip(ToRect(aRect)); } + void Clip(const Rect& rect); // will clip to a rect + void SnappedClip(const gfxRect& rect); // snap rect and clip to the result + void Clip(Path* aPath); + + void PopClip() { + MOZ_ASSERT(!mAzureState.pushedClips.IsEmpty()); + mAzureState.pushedClips.RemoveLastElement(); + mDT->PopClip(); + } + + enum ClipExtentsSpace { + eUserSpace = 0, + eDeviceSpace = 1, + }; + + /** + * According to aSpace, this function will return the current bounds of + * the clip region in user space or device space. + */ + gfxRect GetClipExtents(ClipExtentsSpace aSpace = eUserSpace) const; + + /** + * Exports the current clip using the provided exporter. + */ + bool ExportClip(ClipExporter& aExporter) const; + + /** + * Groups + */ + void PushGroupForBlendBack(gfxContentType content, Float aOpacity = 1.0f, + mozilla::gfx::SourceSurface* aMask = nullptr, + const Matrix& aMaskTransform = Matrix()) const { + mDT->PushLayer(content == gfxContentType::COLOR, aOpacity, aMask, + aMaskTransform); + } + + void PopGroupAndBlend() const { mDT->PopLayer(); } + + Point GetDeviceOffset() const { return mAzureState.deviceOffset; } + void SetDeviceOffset(const Point& aOffset) { + mAzureState.deviceOffset = aOffset; + } + +#ifdef MOZ_DUMP_PAINTING + /** + * Debug functions to encode the current surface as a PNG and export it. + */ + + /** + * Writes a binary PNG file. + */ + void WriteAsPNG(const char* aFile); + + /** + * Write as a PNG encoded Data URL to stdout. + */ + void DumpAsDataURI(); + + /** + * Copy a PNG encoded Data URL to the clipboard. + */ + void CopyAsDataURI(); +#endif + + private: + friend class PatternFromState; + friend class GlyphBufferAzure; + + typedef mozilla::gfx::sRGBColor sRGBColor; + typedef mozilla::gfx::StrokeOptions StrokeOptions; + typedef mozilla::gfx::PathBuilder PathBuilder; + typedef mozilla::gfx::SourceSurface SourceSurface; + + struct AzureState { + AzureState() + : op(CompositionOp::OP_OVER), + color(0, 0, 0, 1.0f), + aaMode(mozilla::gfx::AntialiasMode::SUBPIXEL), + patternTransformChanged(false) +#ifdef DEBUG + , + mContentChanged(false) +#endif + { + } + + CompositionOp op; + DeviceColor color; + RefPtr<gfxPattern> pattern; + Matrix transform; + struct PushedClip { + RefPtr<Path> path; + Rect rect; + Matrix transform; + }; + CopyableTArray<PushedClip> pushedClips; + CopyableTArray<Float> dashPattern; + StrokeOptions strokeOptions; + mozilla::gfx::AntialiasMode aaMode; + bool patternTransformChanged; + Matrix patternTransform; + DeviceColor fontSmoothingBackgroundColor; + // This is used solely for using minimal intermediate surface size. + Point deviceOffset; +#ifdef DEBUG + // Whether the content of this AzureState changed after construction. + bool mContentChanged; +#endif + }; + + // This ensures mPath contains a valid path (in user space!) + void EnsurePath(); + // This ensures mPathBuilder contains a valid PathBuilder (in user space!) + void EnsurePathBuilder(); + CompositionOp GetOp() const; + void ChangeTransform(const Matrix& aNewMatrix, + bool aUpdatePatternTransform = true); + Rect GetAzureDeviceSpaceClipBounds() const; + Matrix GetDTTransform() const { + Matrix mat = mAzureState.transform; + mat.PostTranslate(-mAzureState.deviceOffset); + return mat; + } + + bool mPathIsRect = false; + bool mTransformChanged = false; + Matrix mPathTransform; + Rect mRect; + RefPtr<PathBuilder> mPathBuilder; + RefPtr<Path> mPath; + AzureState mAzureState; + nsTArray<AzureState> mSavedStates; + + // Iterate over all clips in the saved and current states, calling aLambda + // with each of them. + template <typename F> + void ForAllClips(F&& aLambda) const; + + const AzureState& CurrentState() const { return mAzureState; } + + RefPtr<DrawTarget> const mDT; + float mCrossProcessPaintScale = 1.0f; + +#ifdef DEBUG +# undef CURRENTSTATE_CHANGED +#endif +}; + +/** + * Sentry helper class for functions with multiple return points that need to + * call Save() on a gfxContext and have Restore() called automatically on the + * gfxContext before they return. + */ +class MOZ_STACK_CLASS gfxContextAutoSaveRestore final { + public: + gfxContextAutoSaveRestore() : mContext(nullptr) {} + + explicit gfxContextAutoSaveRestore(gfxContext* aContext) + : mContext(aContext) { + mContext->Save(); + } + + ~gfxContextAutoSaveRestore() { Restore(); } + + void SetContext(gfxContext* aContext) { + MOZ_ASSERT(!mContext, "no context?"); + mContext = aContext; + mContext->Save(); + } + + void EnsureSaved(gfxContext* aContext) { + MOZ_ASSERT(!mContext || mContext == aContext, "wrong context"); + if (!mContext) { + mContext = aContext; + mContext->Save(); + } + } + + void Restore() { + if (mContext) { + mContext->Restore(); + mContext = nullptr; + } + } + + private: + gfxContext* mContext; +}; + +/** + * Sentry helper class for functions with multiple return points that need to + * back up the current matrix of a context and have it automatically restored + * before they return. + */ +class MOZ_STACK_CLASS gfxContextMatrixAutoSaveRestore final { + public: + gfxContextMatrixAutoSaveRestore() : mContext(nullptr) {} + + explicit gfxContextMatrixAutoSaveRestore(gfxContext* aContext) + : mContext(aContext), mMatrix(aContext->CurrentMatrix()) {} + + ~gfxContextMatrixAutoSaveRestore() { + if (mContext) { + mContext->SetMatrix(mMatrix); + } + } + + void SetContext(gfxContext* aContext) { + NS_ASSERTION(!mContext, "Not going to restore the matrix on some context!"); + mContext = aContext; + mMatrix = aContext->CurrentMatrix(); + } + + void Restore() { + if (mContext) { + mContext->SetMatrix(mMatrix); + mContext = nullptr; + } + } + + const mozilla::gfx::Matrix& Matrix() { + MOZ_ASSERT(mContext, "mMatrix doesn't contain a useful matrix"); + return mMatrix; + } + + bool HasMatrix() const { return !!mContext; } + + private: + gfxContext* mContext; + mozilla::gfx::Matrix mMatrix; +}; + +class MOZ_STACK_CLASS gfxGroupForBlendAutoSaveRestore final { + public: + using Float = mozilla::gfx::Float; + using Matrix = mozilla::gfx::Matrix; + + explicit gfxGroupForBlendAutoSaveRestore(gfxContext* aContext) + : mContext(aContext) {} + + ~gfxGroupForBlendAutoSaveRestore() { + if (mPushedGroup) { + mContext->PopGroupAndBlend(); + } + } + + void PushGroupForBlendBack(gfxContentType aContent, Float aOpacity = 1.0f, + mozilla::gfx::SourceSurface* aMask = nullptr, + const Matrix& aMaskTransform = Matrix()) { + MOZ_ASSERT(!mPushedGroup, "Already called PushGroupForBlendBack once"); + mContext->PushGroupForBlendBack(aContent, aOpacity, aMask, aMaskTransform); + mPushedGroup = true; + } + + private: + gfxContext* mContext; + bool mPushedGroup = false; +}; + +class MOZ_STACK_CLASS gfxClipAutoSaveRestore final { + public: + using Rect = mozilla::gfx::Rect; + + explicit gfxClipAutoSaveRestore(gfxContext* aContext) : mContext(aContext) {} + + void Clip(const gfxRect& aRect) { Clip(ToRect(aRect)); } + + void Clip(const Rect& aRect) { + MOZ_ASSERT(!mClipped, "Already called Clip once"); + mContext->Clip(aRect); + mClipped = true; + } + + void TransformedClip(const gfxMatrix& aTransform, const gfxRect& aRect) { + MOZ_ASSERT(!mClipped, "Already called Clip once"); + if (aTransform.IsSingular()) { + return; + } + gfxContextMatrixAutoSaveRestore matrixAutoSaveRestore(mContext); + mContext->Multiply(aTransform); + mContext->Clip(aRect); + mClipped = true; + } + + ~gfxClipAutoSaveRestore() { + if (mClipped) { + mContext->PopClip(); + } + } + + private: + gfxContext* mContext; + bool mClipped = false; +}; + +class MOZ_STACK_CLASS DrawTargetAutoDisableSubpixelAntialiasing final { + public: + typedef mozilla::gfx::DrawTarget DrawTarget; + + DrawTargetAutoDisableSubpixelAntialiasing(DrawTarget* aDT, bool aDisable) + : mSubpixelAntialiasingEnabled(false) { + if (aDisable) { + mDT = aDT; + mSubpixelAntialiasingEnabled = mDT->GetPermitSubpixelAA(); + mDT->SetPermitSubpixelAA(false); + } + } + ~DrawTargetAutoDisableSubpixelAntialiasing() { + if (mDT) { + mDT->SetPermitSubpixelAA(mSubpixelAntialiasingEnabled); + } + } + + private: + RefPtr<DrawTarget> mDT; + bool mSubpixelAntialiasingEnabled; +}; + +/* This interface should be implemented to handle exporting the clip from a + * context. + */ +class ClipExporter : public mozilla::gfx::PathSink { + public: + virtual void BeginClip(const mozilla::gfx::Matrix& aMatrix) = 0; + virtual void EndClip() = 0; +}; + +#endif /* GFX_CONTEXT_H */ |