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121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SVG project.
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*
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* The Initial Developer of the Original Code is IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef __NS_SVGGEOMETRYFRAME_H__
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#define __NS_SVGGEOMETRYFRAME_H__
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#include "nsFrame.h"
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#include "gfxMatrix.h"
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class nsSVGPaintServerFrame;
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class gfxContext;
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typedef nsFrame nsSVGGeometryFrameBase;
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/* nsSVGGeometryFrame is a base class for SVG objects that directly
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* have geometry (circle, ellipse, line, polyline, polygon, path, and
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* glyph frames). It knows how to convert the style information into
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* cairo context information and stores the fill/stroke paint
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* servers. */
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class nsSVGGeometryFrame : public nsSVGGeometryFrameBase
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{
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protected:
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NS_DECL_FRAMEARENA_HELPERS
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nsSVGGeometryFrame(nsStyleContext *aContext) : nsSVGGeometryFrameBase(aContext) {}
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public:
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// nsIFrame interface:
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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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virtual PRBool IsFrameOfType(PRUint32 aFlags) const
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{
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return nsSVGGeometryFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGGeometry));
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}
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// nsSVGGeometryFrame methods:
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virtual gfxMatrix GetCanvasTM() = 0;
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PRUint16 GetClipRule();
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float GetStrokeWidth();
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/*
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* Set up a cairo context for filling a path
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* @return PR_FALSE to skip rendering
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*/
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PRBool SetupCairoFill(gfxContext *aContext);
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/*
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* @return PR_FALSE if there is no stroke
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*/
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PRBool HasStroke();
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/*
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* Set up a cairo context for measuring a stroked path
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*/
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void SetupCairoStrokeGeometry(gfxContext *aContext);
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/*
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* Set up a cairo context for hit testing a stroked path
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*/
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void SetupCairoStrokeHitGeometry(gfxContext *aContext);
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/*
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* Set up a cairo context for stroking a path
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* @return PR_FALSE to skip rendering
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*/
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PRBool SetupCairoStroke(gfxContext *aContext);
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protected:
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nsSVGPaintServerFrame *GetPaintServer(const nsStyleSVGPaint *aPaint,
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const FramePropertyDescriptor *aProperty);
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private:
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nsresult GetStrokeDashArray(double **arr, PRUint32 *count);
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float GetStrokeDashoffset();
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/**
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* Returns the given 'fill-opacity' or 'stroke-opacity' value multiplied by
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* the value of the 'opacity' property if it's possible to avoid the expense
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* of creating and compositing an offscreen surface for 'opacity' by
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* combining 'opacity' with the 'fill-opacity'/'stroke-opacity'. If not, the
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* given 'fill-opacity'/'stroke-opacity' is returned unmodified.
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*/
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float MaybeOptimizeOpacity(float aFillOrStrokeOpacity);
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};
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#endif // __NS_SVGGEOMETRYFRAME_H__
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