RetroZilla/layout/svg/renderer/public/nsISVGRendererCanvas.idl

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2015-10-21 05:03:22 +02:00
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla SVG project.
*
* The Initial Developer of the Original Code is
* Crocodile Clips Ltd.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISupports.idl"
%{C++
struct nsRect;
%}
[ref] native nsRectRef(nsRect);
typedef PRUint32 nscolor;
interface nsIRenderingContext;
interface nsPresContext;
interface nsIDOMSVGMatrix;
interface nsISVGRendererSurface;
/**
* \addtogroup renderer_interfaces Rendering Engine Interfaces
* @{
*/
/**
* One of a number of interfaces (all starting with nsISVGRenderer*)
* to be implemented by an SVG rendering engine. See nsISVGRenderer
* for more details.
*
* This interface abstracts a rendering engine-native canvas object
* onto which path and glyph geometries can be painted.
*
* A canvas object is instantiated by the backend for a given
* Mozilla-native rendering object with a call to
* nsISVGRenderer::createCanvas().
*/
[uuid(2e64a227-de4b-4a69-ab82-5dda1579e90f)]
interface nsISVGRendererCanvas : nsISupports
{
/**
* Lock a portion of the canvas and obtain a rendering context onto
* which Mozilla can paint non-svg content. This is needed for
* (partial) foreignObject support.
*
* lockRenderingContext() calls are paired with
* unlockRenderingContext() calls.
*
* @param rect Area to be locked.
* @return Mozilla-native rendering context for the locked area.
*/
[noscript] nsIRenderingContext lockRenderingContext([const] in nsRectRef rect);
/**
* Unlock the canvas portion locked with a previous call to
* lockRenderingContext().
*/
void unlockRenderingContext();
// XXX do we need this?
nsPresContext getPresContext();
/**
* Fill the canvas with the given color.
*
* @param color Fill color.
*/
void clear(in nscolor color);
/**
* Ensure that all renderings on the canvas have been flushed to the
* Mozilla-native rendering context.
*/
void flush();
/**
* Set render mode (clipping or normal draw)
*/
const unsigned short SVG_RENDER_MODE_NORMAL = 0;
const unsigned short SVG_RENDER_MODE_CLIP = 1;
attribute unsigned short renderMode;
/**
* Push/Pop clip path.
*/
void pushClip();
void popClip();
/**
* Set rectangular clip region.
*/
void setClipRect(in nsIDOMSVGMatrix canvasTM, in float x, in float y,
in float width, in float height);
/**
* Push/Pop surface as primary drawing surface.
*/
void pushSurface(in nsISVGRendererSurface surface);
void popSurface();
/**
* Surface composition.
*/
void compositeSurface(in nsISVGRendererSurface surface,
in unsigned long x, in unsigned long y,
in float opacity);
void compositeSurfaceMatrix(in nsISVGRendererSurface surface,
in nsIDOMSVGMatrix canvasTM,
in float opacity);
};
/** @} */