/* -*- 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 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 NPL, 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);


interface nsISVGPathGeometrySource;
interface nsISVGGlyphMetricsSource;
interface nsISVGGlyphGeometrySource;
interface nsISVGRendererPathGeometry;
interface nsISVGRendererGlyphMetrics;
interface nsISVGRendererGlyphGeometry;
interface nsISVGRendererCanvas;
interface nsIRenderingContext;
interface nsISVGRendererRegion;
interface nsIPresContext;

/**
 * \addtogroup renderer_interfaces Rendering Engine Interfaces
 * @{
 */

/**
 * One of a number of interfaces (all starting with nsISVGRenderer*)
 * to be implemented by an SVG rendering engine. 
 *
 * This interface serves as a factory for rendering engine-related
 * objects. Each rendering engine needs to make available an
 * nsIRenderer-object with a contract id of the form
 * "@mozilla.org/svg/renderer;1?tech=NAME".
 *
 * Engines implemented at the moment include an ms windows gdi+ engine
 * ("@mozilla.org/svg/renderer;1?tech=GDIPLUS") and a (somewhat)
 * cross-platform libart engine
 * ("@mozilla.org/svg/renderer;1?tech=LIBART").
 */
[scriptable, uuid(8a1398db-fb25-4711-85fc-4f5665ea7d17)]
interface nsISVGRenderer : nsISupports
{
  // void Init(in nsIPresContext presContext);
  
  /**
   * Create a rendering engine-native path geometry object for the
   * source object given by 'src'.
   *
   * @param src The source object describing the path for which
   * this object is being created.
   * @return A rendering engine-native path geometry object.
   */
  nsISVGRendererPathGeometry createPathGeometry(in nsISVGPathGeometrySource src);

  /**
   * Create a rendering engine-native glyph metrics object for the
   * source object given by 'src'.
   *
   * @param src The source object describing the glyph for which
   * this metrics object is being created.
   * @return A rendering engine-native glyph metrics object.
   */
  nsISVGRendererGlyphMetrics createGlyphMetrics(in nsISVGGlyphMetricsSource src);

  /**
   * Create a rendering engine-native glyph geometry object for the
   * source object given by 'src'.
   *
   * @param src The source object describing the glyph for which
   * this object is being created.
   * @return A rendering engine-native glyph geometry object.
   */
  nsISVGRendererGlyphGeometry createGlyphGeometry(in nsISVGGlyphGeometrySource src);
  
  /**
   * Create a rendering engine-native canvas object for the
   * Mozilla-native rendering context 'ctx' and presentation context
   * 'presContext'.
   *
   * @param ctx Mozilla-native rendering context.
   * @param presContext Presentation context.
   * @param dirtyRect Area that the canvas should cover.
   * @return A rendering engine-native canvas object.
   */
  [noscript] nsISVGRendererCanvas createCanvas(in nsIRenderingContext ctx,
                                               in nsIPresContext presContext,
                                               [const] in nsRectRef dirtyRect);

  /**
   * Create a rendering engine-native region object for the
   * given axis-aligned rectangle.
   *
   * @param x X-coordinate of rectangle (pixels).
   * @param y Y-coordinate of rectangle (pixels).
   * @param width Width of rectangle (pixels).
   * @param height Height of rectangle (pixels).
   *
   * @return A rendering engine-native region object.
   */
  nsISVGRendererRegion createRectRegion(in float x, in float y, in float width, in float height);
};

/** @} */


%{C++
    
#define NS_SVG_RENDERER_CONTRACTID         "@mozilla.org/svg/renderer;1"
#define NS_SVG_RENDERER_CONTRACTID_PREFIX  NS_SVG_RENDERER_CONTRACTID "?tech="

#define NS_SVG_RENDERER_LIBART_CONTRACTID NS_SVG_RENDERER_CONTRACTID_PREFIX "LIBART"

// {A88E949D-AA36-4734-9C6E-F0FBCEF4FC47}
#define NS_SVG_RENDERER_LIBART_CID \
{ 0xa88e949d, 0xaa36, 0x4734, { 0x9c, 0x6e, 0xf0, 0xfb, 0xce, 0xf4, 0xfc, 0x47 } }
    
#define NS_SVG_RENDERER_GDIPLUS_CONTRACTID NS_SVG_RENDERER_CONTRACTID_PREFIX "GDIPLUS"

// {D260F971-DB9D-425B-8C9B-4EB9605CE35D}
#define NS_SVG_RENDERER_GDIPLUS_CID \
{ 0xd260f971, 0xdb9d, 0x425b, { 0x8c, 0x9b, 0x4e, 0xb9, 0x60, 0x5c, 0xe3, 0x5d } }

#define NS_SVG_RENDERER_CAIRO_CONTRACTID NS_SVG_RENDERER_CONTRACTID_PREFIX "CAIRO"

// {9f0fa438-1b1a-4a1b-a28d-91460542276e}
#define NS_SVG_RENDERER_CAIRO_CID \
{ 0x9f0fa438, 0x1b1a, 0x4a1b, { 0xa2, 0x8d, 0x91, 0x46, 0x05, 0x42, 0x27, 0x6e } }

%}
