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bug 107018, alpha blending routines for anti-aliased scaled X bitmap fonts

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(part of bug 90813), r=pavlov, sr=waterson
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bstell%netscape.com 2001-11-15 06:45:16 +00:00
parent 50a2692b43
commit 2a52a5ee53
2 changed files with 1238 additions and 0 deletions
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gfx/src/gtk/nsX11AlphaBlend.cpp Normal file
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gfx/src/gtk/nsX11AlphaBlend.h Normal file
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 Netscape.com code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Stell <bstell@netscape.com>
*
*
* 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsX11AlphaBlend_h__
#define nsX11AlphaBlend_h__
#include "X11/Xlib.h"
#include "nsColor.h"
class nsAntiAliasedGlyph;
void AADrawBox(XImage *, PRInt32, PRInt32, PRInt32, PRInt32, nscolor, PRUint8);
void nsX11AlphaBlendFreeGlobals(void);
nsresult nsX11AlphaBlendInitGlobals(Display *dsp);
typedef void (*blendGlyph)(XImage *, nsAntiAliasedGlyph *, PRUint8*,
nscolor, int, int);
typedef void (*blendPixel)(XImage *, int, int, nscolor, int);
typedef nscolor (*pixelToNSColor)(unsigned long aPixel);
///////////////////////////////////////////////////////////////////////
//
// class nsX11AlphaBlend class definition
//
///////////////////////////////////////////////////////////////////////
class nsX11AlphaBlend {
public:
inline static PRBool CanAntiAlias() { return sAvailable; };
inline static blendPixel GetBlendPixel() { return sBlendPixel; };
inline static blendGlyph GetBlendGlyph() { return sBlendMonoImage; };
static XImage* GetXImage(PRUint32 width, PRUint32 height);
static void FreeGlobals();
static nsresult InitGlobals(Display *dsp);
static XImage* GetBackground(Display *, int, Drawable,
PRInt32, PRInt32, PRUint32, PRUint32);
static nscolor PixelToNSColor(unsigned long aPixel);
protected:
static void ClearGlobals();
static void ClearFunctions();
static PRBool InitLibrary(Display *dsp);
static PRBool sAvailable;
static PRUint16 sBitmapPad;
static PRUint16 sBitsPerPixel;
static blendGlyph sBlendMonoImage;
static blendPixel sBlendPixel;
static PRUint16 sBytesPerPixel;
static int sDepth;
static PRBool sInited;
static pixelToNSColor sPixelToNSColor;
};
#endif /* nsX11AlphaBlend_h__ */