зеркало из https://github.com/mozilla/gecko-dev.git
374 строки
15 KiB
C++
374 строки
15 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_DRAWTARGETRECORDING_H_
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#define MOZILLA_GFX_DRAWTARGETRECORDING_H_
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#include "2D.h"
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#include "DrawEventRecorder.h"
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namespace mozilla {
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namespace gfx {
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class DrawTargetRecording : public DrawTarget
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{
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetRecording, override)
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DrawTargetRecording(DrawEventRecorder *aRecorder, DrawTarget *aDT, IntSize aSize, bool aHasData = false);
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~DrawTargetRecording();
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virtual DrawTargetType GetType() const override { return mFinalDT->GetType(); }
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virtual BackendType GetBackendType() const override { return BackendType::RECORDING; }
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virtual bool IsRecording() const override { return true; }
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virtual already_AddRefed<SourceSurface> Snapshot() override;
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virtual already_AddRefed<SourceSurface> IntoLuminanceSource(LuminanceType aLuminanceType, float aOpacity) override;
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virtual void DetachAllSnapshots() override;
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virtual IntSize GetSize() const override { return mSize; }
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/* Ensure that the DrawTarget backend has flushed all drawing operations to
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* this draw target. This must be called before using the backing surface of
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* this draw target outside of GFX 2D code.
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*/
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virtual void Flush() override { mFinalDT->Flush(); }
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virtual void FlushItem(const IntRect &aBounds) override;
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/*
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* Draw a surface to the draw target. Possibly doing partial drawing or
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* applying scaling. No sampling happens outside the source.
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*
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* aSurface Source surface to draw
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* aDest Destination rectangle that this drawing operation should draw to
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* aSource Source rectangle in aSurface coordinates, this area of aSurface
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* will be stretched to the size of aDest.
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* aOptions General draw options that are applied to the operation
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* aSurfOptions DrawSurface options that are applied
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*/
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virtual void DrawSurface(SourceSurface *aSurface,
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const Rect &aDest,
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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,
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const Rect &aSourceRect,
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const Point &aDestPoint,
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const DrawOptions &aOptions = DrawOptions()) override;
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/*
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* Blend a surface to the draw target with a shadow. The shadow is drawn as a
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* gaussian blur using a specified sigma. The shadow is clipped to the size
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* of the input surface, so the input surface should contain a transparent
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* border the size of the approximate coverage of the blur (3 * aSigma).
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* NOTE: This function works in device space!
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*
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* aSurface Source surface to draw.
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* aDest Destination point that this drawing operation should draw to.
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* aColor Color of the drawn shadow
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* aOffset Offset of the shadow
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* aSigma Sigma used for the guassian filter kernel
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* aOperator Composition operator used
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*/
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virtual void DrawSurfaceWithShadow(SourceSurface *aSurface,
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const Point &aDest,
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const Color &aColor,
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const Point &aOffset,
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Float aSigma,
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CompositionOp aOperator) override;
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/*
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* Clear a rectangle on the draw target to transparent black. This will
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* respect the clipping region and transform.
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*
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* aRect Rectangle to clear
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*/
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virtual void ClearRect(const Rect &aRect) override;
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/*
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* This is essentially a 'memcpy' between two surfaces. It moves a pixel
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* aligned area from the source surface unscaled directly onto the
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* drawtarget. This ignores both transform and clip.
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*
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* aSurface Surface to copy from
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* aSourceRect Source rectangle to be copied
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* aDest Destination point to copy the surface to
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*/
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virtual void CopySurface(SourceSurface *aSurface,
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const IntRect &aSourceRect,
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const IntPoint &aDestination) override;
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/*
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* Fill a rectangle on the DrawTarget with a certain source pattern.
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*
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* aRect Rectangle that forms the mask of this filling operation
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* aPattern Pattern that forms the source of this filling operation
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* aOptions Options that are applied to this operation
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*/
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virtual void FillRect(const Rect &aRect,
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const Pattern &aPattern,
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const DrawOptions &aOptions = DrawOptions()) override;
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/*
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* Stroke a rectangle on the DrawTarget with a certain source pattern.
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*
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* aRect Rectangle that forms the mask of this stroking operation
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* aPattern Pattern that forms the source of this stroking operation
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* aOptions Options that are applied to this operation
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*/
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virtual void StrokeRect(const Rect &aRect,
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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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/*
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* Stroke a line on the DrawTarget with a certain source pattern.
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*
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* aStart Starting point of the line
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* aEnd End point of the line
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* aPattern Pattern that forms the source of this stroking operation
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* aOptions Options that are applied to this operation
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*/
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virtual void StrokeLine(const Point &aStart,
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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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/*
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* Stroke a path on the draw target with a certain source pattern.
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*
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* aPath Path that is to be stroked
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* aPattern Pattern that should be used for the stroke
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* aStrokeOptions Stroke options used for this operation
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* aOptions Draw options used for this operation
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*/
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virtual void Stroke(const Path *aPath,
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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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/*
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* Fill a path on the draw target with a certain source pattern.
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*
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* aPath Path that is to be filled
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* aPattern Pattern that should be used for the fill
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* aOptions Draw options used for this operation
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*/
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virtual void Fill(const Path *aPath,
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const Pattern &aPattern,
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const DrawOptions &aOptions = DrawOptions()) override;
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/*
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* Fill a series of clyphs on the draw target with a certain source pattern.
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*/
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virtual void FillGlyphs(ScaledFont *aFont,
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const GlyphBuffer &aBuffer,
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const Pattern &aPattern,
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const DrawOptions &aOptions = DrawOptions()) override;
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/*
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* This takes a source pattern and a mask, and composites the source pattern
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* onto the destination surface using the alpha channel of the mask pattern
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* as a mask for the operation.
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*
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* aSource Source pattern
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* aMask Mask pattern
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* aOptions Drawing options
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*/
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virtual void Mask(const Pattern &aSource,
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const Pattern &aMask,
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const DrawOptions &aOptions = DrawOptions()) override;
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virtual void MaskSurface(const Pattern &aSource,
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SourceSurface *aMask,
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Point aOffset,
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const DrawOptions &aOptions = DrawOptions()) override;
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/*
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* Push a clip to the DrawTarget.
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*
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* aPath The path to clip to
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*/
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virtual void PushClip(const Path *aPath) override;
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/*
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* Push an axis-aligned rectangular clip to the DrawTarget. This rectangle
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* is specified in user space.
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*
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* aRect The rect to clip to
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*/
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virtual void PushClipRect(const Rect &aRect) override;
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/* Pop a clip from the DrawTarget. A pop without a corresponding push will
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* be ignored.
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*/
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virtual void PopClip() override;
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/**
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* Push a 'layer' to the DrawTarget, a layer is a temporary surface that all
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* drawing will be redirected to, this is used for example to support group
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* opacity or the masking of groups. Clips must be balanced within a layer,
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* i.e. between a matching PushLayer/PopLayer pair there must be as many
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* PushClip(Rect) calls as there are PopClip calls.
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*
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* @param aOpaque Whether the layer will be opaque
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* @param aOpacity Opacity of the layer
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* @param aMask Mask applied to the layer
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* @param aMaskTransform Transform applied to the layer mask
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* @param aBounds Optional bounds in device space to which the layer is
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* limited in size.
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* @param aCopyBackground Whether to copy the background into the layer, this
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* is only supported when aOpaque is true.
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*/
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virtual void PushLayer(bool aOpaque, Float aOpacity,
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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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/**
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* Push a 'layer' to the DrawTarget, a layer is a temporary surface that all
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* drawing will be redirected to, this is used for example to support group
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* opacity or the masking of groups. Clips must be balanced within a layer,
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* i.e. between a matching PushLayer/PopLayer pair there must be as many
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* PushClip(Rect) calls as there are PopClip calls.
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*
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* @param aOpaque Whether the layer will be opaque
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* @param aOpacity Opacity of the layer
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* @param aMask Mask applied to the layer
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* @param aMaskTransform Transform applied to the layer mask
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* @param aBounds Optional bounds in device space to which the layer is
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* limited in size.
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* @param aCopyBackground Whether to copy the background into the layer, this
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* is only supported when aOpaque is true.a
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* @param aCompositionOp The CompositionOp to use when blending the layer into
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* the destination
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*/
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virtual void PushLayerWithBlend(bool aOpaque, Float aOpacity,
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SourceSurface* aMask,
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const Matrix& aMaskTransform,
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const IntRect& aBounds = IntRect(),
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bool aCopyBackground = false,
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CompositionOp aCompositionOp = CompositionOp::OP_OVER) override;
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/**
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* This balances a call to PushLayer and proceeds to blend the layer back
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* onto the background. This blend will blend the temporary surface back
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* onto the target in device space using POINT sampling and operator over.
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*/
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virtual void PopLayer() override;
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/*
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* Create a SourceSurface optimized for use with this DrawTarget from
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* existing bitmap data in memory.
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*
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* The SourceSurface does not take ownership of aData, and may be freed at any time.
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*/
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virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData,
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const IntSize &aSize,
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int32_t aStride,
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SurfaceFormat aFormat) const override;
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/*
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* Create a SourceSurface optimized for use with this DrawTarget from
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* an arbitrary other SourceSurface. This may return aSourceSurface or some
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* other existing surface.
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*/
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virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const override;
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/*
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* Create a SourceSurface for a type of NativeSurface. This may fail if the
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* draw target does not know how to deal with the type of NativeSurface passed
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* in.
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*/
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virtual already_AddRefed<SourceSurface>
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CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const override;
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/*
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* Create a DrawTarget whose snapshot is optimized for use with this DrawTarget.
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*/
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virtual already_AddRefed<DrawTarget>
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CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const override;
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/**
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* Create a similar DrawTarget whose requested size may be clipped based
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* on this DrawTarget's rect transformed to the new target's space.
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*/
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virtual RefPtr<DrawTarget> CreateClippedDrawTarget(const IntSize& aMaxSize,
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const Matrix& aTransform,
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SurfaceFormat aFormat) const override;
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/*
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* Create a path builder with the specified fillmode.
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*
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* We need the fill mode up front because of Direct2D.
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* ID2D1SimplifiedGeometrySink requires the fill mode
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* to be set before calling BeginFigure().
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*/
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virtual already_AddRefed<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const override;
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/*
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* Create a GradientStops object that holds information about a set of
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* gradient stops, this object is required for linear or radial gradient
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* patterns to represent the color stops in the gradient.
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*
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* aStops An array of gradient stops
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* aNumStops Number of stops in the array aStops
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* aExtendNone This describes how to extend the stop color outside of the
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* gradient area.
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*/
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virtual already_AddRefed<GradientStops>
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CreateGradientStops(GradientStop *aStops,
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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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/*
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* Set a transform on the surface, this transform is applied at drawing time
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* to both the mask and source of the operation.
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*/
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virtual void SetTransform(const Matrix &aTransform) override;
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/* Tries to get a native surface for a DrawTarget, this may fail if the
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* draw target cannot convert to this surface type.
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*/
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virtual void *GetNativeSurface(NativeSurfaceType aType) override { return mFinalDT->GetNativeSurface(aType); }
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virtual bool IsCurrentGroupOpaque() override {
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return mFinalDT->IsCurrentGroupOpaque();
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}
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private:
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/**
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* Used for creating a DrawTargetRecording for a CreateSimilarDrawTarget call.
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*
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* @param aDT DrawTargetRecording on which CreateSimilarDrawTarget was called
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* @param aSize size of the the similar DrawTarget
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* @param aFormat format of the similar DrawTarget
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*/
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DrawTargetRecording(const DrawTargetRecording *aDT,
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IntSize aSize, SurfaceFormat aFormat);
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Path *GetPathForPathRecording(const Path *aPath) const;
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already_AddRefed<PathRecording> EnsurePathStored(const Path *aPath);
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void EnsurePatternDependenciesStored(const Pattern &aPattern);
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RefPtr<DrawEventRecorderPrivate> mRecorder;
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RefPtr<DrawTarget> mFinalDT;
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IntSize mSize;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_DRAWTARGETRECORDING_H_ */
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