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75 lines
2.9 KiB
C++
75 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsIBlender_h___
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#define nsIBlender_h___
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#include "nscore.h"
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#include "nsISupports.h"
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#include "nsIRenderingContext.h"
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// IID for the nsIBlender interface
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#define NS_IBLENDER_IID \
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{ 0xbdb4b5b0, 0xf0db, 0x11d1, \
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{ 0xa8, 0x2a, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9 } }
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//----------------------------------------------------------------------
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// Blender interface
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class nsIBlender : public nsISupports
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{
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public:
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/**
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* Initialize the Blender
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* @update dc 11/4/98
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* @param aDeviceContext is where the blender can get info about the device its blending on
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* @result The result of the initialization, NS_OK if no errors
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*/
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NS_IMETHOD Init(nsIDeviceContext *aDeviceContext) = 0;
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/**
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* NOTE: if we can make this static, that would be great. I don't think we can.
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* Blend source and destination nsDrawingSurfaces. Both drawing surfaces
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* will have bitmaps associated with them.
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* @param aSX x offset into source drawing surface of blend area
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* @param aSY y offset into source drawing surface of blend area
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* @param aWidth width of blend area
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* @param aHeight width of blend area
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* @param aSrc source for the blending
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* @param aDest destination for blending
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* @param aDX x offset into destination drawing surface of blend area
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* @param aDY y offset into destination drawing surface of blend area
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* @param aSrcOpacity 0.0f -> 1.0f opacity value of source area. 1.0f indicates
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* complete opacity.
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* @param aSecondSrc an optional second source drawing surface which is used in
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* conjunction with the background color parameters to determine
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* which pixels to blend
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* @param aSrcBackColor color of pixels in aSrc that should be
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* considered "background" color
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* @param aSecondSrcBackColor color of pixels in aSrc that should be
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* considered "background" color
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*/
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NS_IMETHOD Blend(PRInt32 aSX, PRInt32 aSY, PRInt32 aWidth, PRInt32 aHeight,nsDrawingSurface aSrc,
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nsDrawingSurface aDest, PRInt32 aDX, PRInt32 aDY, float aSrcOpacity,
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nsDrawingSurface aSecondSrc = nsnull, nscolor aSrcBackColor = NS_RGB(0, 0, 0),
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nscolor aSecondSrcBackColor = NS_RGB(0, 0, 0)) = 0;
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};
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#endif
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