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Disable use of AlphaBlend for windows backend.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/trunk@20080 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Fred Kiefer 2004-09-17 17:52:28 +00:00
parent 63366359cf
commit 93d65fa6f9
2 changed files with 15 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2004-09-17 Fred Kiefer <FredKiefer@gmx.de>
* Source/winlib/Win32GState.m (-_compositeGState:...fraction:):
Made the use of AlphaBlend depend on a define, which by default is missing.
2004-09-09 Fred Kiefer <FredKiefer@gmx.de>
* Tools/xpbs.m (-[XPbOwner getSelectionData:type:], -[XPbOwner

10
Source/winlib/WIN32GState.m
View file

@ -28,8 +28,13 @@
#include <AppKit/NSFont.h>
#include <AppKit/NSGraphics.h>
// Currently the use of alpha blending is switched off by default.
//#define USE_ALPHABLEND
// Define this so we pick up AlphaBlend, when loading windows.h
#ifdef USE_ALPHABLEND
#define WINVER 0x0500
#endif
#include "winlib/WIN32GState.h"
#include "winlib/WIN32Context.h"
#include "winlib/WIN32FontInfo.h"
@ -46,6 +51,7 @@
// before and after a bezier path forming an oblique
// angle. The solution is to insert extra MoveToEx()'s
// before and after the PolyBezierTo().
// FK: I switched this off, as I think the treatment is worse than the illness.
#define GDI_WIDELINE_BEZIERPATH_BUG 0
static inline
@ -230,6 +236,7 @@ RECT GSViewRectToWin(WIN32GState *s, NSRect r)
{
case NSCompositeSourceOver:
{
#ifdef USE_ALPHABLEND
// Use (0..1) fraction to set a (0..255) alpha constant value
BYTE SourceCosntantAlpha = (BYTE)(delta * 255);
BLENDFUNCTION blendFunc = {AC_SRC_OVER, 0, SourceCosntantAlpha, AC_SRC_ALPHA};
@ -239,6 +246,7 @@ RECT GSViewRectToWin(WIN32GState *s, NSRect r)
rectFrom.left, rectFrom.top,
(rectFrom.right - rectFrom.left), h, blendFunc);
break;
#endif
}
default:
@ -474,6 +482,7 @@ HBITMAP GSCreateBitmap(HDC hDC, int pixelsWide, int pixelsHigh,
int h;
int y1;
/*
NSDebugLLog(@"WIN32GState", @"DPSImage : pixelsWide = %d : pixelsHigh = %d"
": bitsPerSample = %d : samplesPerPixel = %d"
": bitsPerPixel = %d : bytesPerRow = %d "
@ -483,6 +492,7 @@ HBITMAP GSCreateBitmap(HDC hDC, int pixelsWide, int pixelsHigh,
bitsPerSample, samplesPerPixel,
bitsPerPixel, bytesPerRow,
isPlanar, hasAlpha, colorSpaceName);
*/
if (window == NULL)
{