1 /*
2 * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
20 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #ifndef GDIExtras_h
26 #define GDIExtras_h
27
28 #include <windows.h>
29
30 namespace WebCore {
31
32 typedef BOOL (APIENTRY *AlphaBlendPointerType) (HDC hdcDest, int nXOriginDest, int nYOriginDest, int nWidthDest, int nHeightDest, HDC hdcSrc,
33 int nXOriginSrc, int nYOriginSrc, int nWidthSrc, int nHeightSrc, BLENDFUNCTION blendFunction);
34
35 #if OS(WINCE)
36 AlphaBlendPointerType AlphaBlendPointer();
37 #endif
38
hasAlphaBlendSupport()39 inline bool hasAlphaBlendSupport()
40 {
41 #if OS(WINCE)
42 return AlphaBlendPointer();
43 #else
44 return true;
45 #endif
46 }
47
alphaBlendIfSupported(HDC hdcDest,int nXOriginDest,int nYOriginDest,int nWidthDest,int nHeightDest,HDC hdcSrc,int nXOriginSrc,int nYOriginSrc,int nWidthSrc,int nHeightSrc,BLENDFUNCTION blendFunction)48 inline bool alphaBlendIfSupported(HDC hdcDest, int nXOriginDest, int nYOriginDest, int nWidthDest, int nHeightDest, HDC hdcSrc,
49 int nXOriginSrc, int nYOriginSrc, int nWidthSrc, int nHeightSrc, BLENDFUNCTION blendFunction)
50 {
51 #if OS(WINCE)
52 AlphaBlendPointerType alphaBlendPointer = AlphaBlendPointer();
53 if (!alphaBlendPointer)
54 return false;
55
56 alphaBlendPointer(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc, blendFunction);
57 #else
58 AlphaBlend(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc, blendFunction);
59 #endif
60 return true;
61 }
62
63 } // namespace WebCore
64
65 #endif // GDIExtras_h
66