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71 lines
2.9 KiB
C++
71 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 Thebes gfx.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Vladimir Vukicevic <vladimir@pobox.com>
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 _GFXALPHARECOVERY_H_
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#define _GFXALPHARECOVERY_H_
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#include "gfxContext.h"
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#include "gfxImageSurface.h"
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class THEBES_API gfxAlphaRecovery {
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public:
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struct Analysis {
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PRBool uniformColor;
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PRBool uniformAlpha;
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gfxFloat alpha;
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gfxFloat r, g, b;
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};
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/* Given two surfaces of equal size with the same rendering, one onto a
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* black background and the other onto white, recovers alpha values from
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* the difference and sets the alpha values on the black surface.
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* The surfaces must have format RGB24 or ARGB32.
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* Returns PR_TRUE on success.
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*/
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static PRBool RecoverAlpha (gfxImageSurface *blackSurface,
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const gfxImageSurface *whiteSurface,
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Analysis *analysis = nsnull);
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/* This does the save as the previous function, only using SSE2
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* optimizations, usually this should not be called directly.
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*/
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static PRBool RecoverAlphaSSE2 (gfxImageSurface *blackSurface,
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const gfxImageSurface *whiteSurface);
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};
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#endif /* _GFXALPHARECOVERY_H_ */
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