gecko-dev/layout/svg/nsSVGPaintServerFrame.h

91 строка
2.8 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 __NS_SVGPAINTSERVERFRAME_H__
#define __NS_SVGPAINTSERVERFRAME_H__
#include "gfxRect.h"
#include "mozilla/Attributes.h"
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsIFrame.h"
#include "nsQueryFrame.h"
#include "nsSVGContainerFrame.h"
#include "nsSVGUtils.h"
namespace mozilla {
namespace gfx {
class DrawTarget;
} // namespace gfx
} // namespace mozilla
class gfxContext;
class gfxPattern;
/**
* RAII class used to temporarily set and remove the
* NS_FRAME_DRAWING_AS_PAINTSERVER frame state bit while a frame is being
* drawn as a paint server.
*/
class MOZ_RAII AutoSetRestorePaintServerState {
public:
explicit AutoSetRestorePaintServerState(
nsIFrame* aFrame MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: mFrame(aFrame) {
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
mFrame->AddStateBits(NS_FRAME_DRAWING_AS_PAINTSERVER);
}
~AutoSetRestorePaintServerState() {
mFrame->RemoveStateBits(NS_FRAME_DRAWING_AS_PAINTSERVER);
}
private:
nsIFrame* mFrame;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
class nsSVGPaintServerFrame : public nsSVGContainerFrame {
protected:
typedef mozilla::gfx::DrawTarget DrawTarget;
nsSVGPaintServerFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
ClassID aID)
: nsSVGContainerFrame(aStyle, aPresContext, aID) {
AddStateBits(NS_FRAME_IS_NONDISPLAY);
}
public:
typedef mozilla::image::imgDrawingParams imgDrawingParams;
NS_DECL_ABSTRACT_FRAME(nsSVGPaintServerFrame)
/**
* Constructs a gfxPattern of the paint server rendering.
*
* @param aContextMatrix The transform matrix that is currently applied to
* the gfxContext that is being drawn to. This is needed by SVG patterns so
* that surfaces of the correct size can be created. (SVG gradients are
* vector based, so it's not used there.)
*/
virtual already_AddRefed<gfxPattern> GetPaintServerPattern(
nsIFrame* aSource, const DrawTarget* aDrawTarget,
const gfxMatrix& aContextMatrix,
mozilla::StyleSVGPaint nsStyleSVG::*aFillOrStroke, float aOpacity,
imgDrawingParams& aImgParams,
const gfxRect* aOverrideBounds = nullptr) = 0;
// nsIFrame methods:
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override {}
virtual bool IsFrameOfType(uint32_t aFlags) const override {
return nsSVGContainerFrame::IsFrameOfType(aFlags &
~nsIFrame::eSVGPaintServer);
}
};
#endif // __NS_SVGPAINTSERVERFRAME_H__