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- /* -*- Mode: C++; 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 mozilla.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * 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 ***** */
-
- #ifndef nsIBlender_h___
- #define nsIBlender_h___
-
- #include "nscore.h"
- #include "nsISupports.h"
- #include "nsIRenderingContext.h"
-
- // IID for the nsIBlender interface
- #define NS_IBLENDER_IID \
- { 0xbdb4b5b0, 0xf0db, 0x11d1, \
- { 0xa8, 0x2a, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
-
- //----------------------------------------------------------------------
-
- // Blender interface
- class nsIBlender : public nsISupports
- {
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IBLENDER_IID)
-
- /**
- * Initialize the Blender
- * @update dc 11/4/98
- * @param aContext is where the blender can get info about the device its blending on
- * @result The result of the initialization, NS_OK if no errors
- */
- NS_IMETHOD Init(nsIDeviceContext *aContext) = 0;
-
- /**
- * NOTE: if we can make this static, that would be great. I don't think we can.
- * Blend source and destination nsDrawingSurfaces. Both drawing surfaces
- * will have bitmaps associated with them.
- * @param aSX x offset into source drawing surface of blend area
- * @param aSY y offset into source drawing surface of blend area
- * @param aWidth width of blend area
- * @param aHeight width of blend area
- * @param aSrc source for the blending
- * @param aDest destination for blending
- * @param aDX x offset into destination drawing surface of blend area
- * @param aDY y offset into destination drawing surface of blend area
- * @param aSrcOpacity 0.0f -> 1.0f opacity value of source area. 1.0f indicates
- * complete opacity.
- * @param aSecondSrc an optional second source drawing surface which is used in
- * conjunction with the background color parameters to determine
- * which pixels to blend
- * @param aSrcBackColor color of pixels in aSrc that should be
- * considered "background" color
- * @param aSecondSrcBackColor color of pixels in aSrc that should be
- * considered "background" color
- */
- NS_IMETHOD Blend(PRInt32 aSX, PRInt32 aSY, PRInt32 aWidth, PRInt32 aHeight,nsIDrawingSurface* aSrc,
- nsIDrawingSurface* aDest, PRInt32 aDX, PRInt32 aDY, float aSrcOpacity,
- nsIDrawingSurface* aSecondSrc = nsnull, nscolor aSrcBackColor = NS_RGB(0, 0, 0),
- nscolor aSecondSrcBackColor = NS_RGB(0, 0, 0)) = 0;
-
- NS_IMETHOD Blend(PRInt32 aSX, PRInt32 aSY, PRInt32 aWidth, PRInt32 aHeight, nsIRenderingContext *aSrc,
- nsIRenderingContext *aDest, PRInt32 aDX, PRInt32 aDY, float aSrcOpacity,
- nsIRenderingContext *aSecondSrc = nsnull, nscolor aSrcBackColor = NS_RGB(0, 0, 0),
- nscolor aSecondSrcBackColor = NS_RGB(0, 0, 0)) = 0;
-
- /**
- GetAlphas computes an array of alpha values for a rectangle of pixels, using
- the drawn-onto-black and the drawn-onto-white images. The pixels are
- returned in a new'ed array of aRect.width*aRect.height elements, in row-major
- order. This array must be freed by the caller.
- */
- NS_IMETHOD GetAlphas(const nsRect& aRect, nsIDrawingSurface* aBlack,
- nsIDrawingSurface* aWhite, PRUint8** aAlphas) = 0;
- };
-
- #endif
-