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Adapted GdiTransparentBlt by Kevin Koltzau

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From WINE Friday the 13th 2004

svn path=/trunk/; revision=8164
This commit is contained in:
Steven Edwards
2004-02-14 00:31:39 +00:00
parent 9a8ead9623
commit fbd7136c2e
2 changed files with 102 additions and 12 deletions
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13
reactos/lib/gdi32/misc/stubs.c
View File

@@ -1,4 +1,4 @@
/* $Id: stubs.c,v 1.48 2004/02/08 21:37:52 weiden Exp $
/* $Id: stubs.c,v 1.49 2004/02/14 00:31:38 sedwards Exp $
*
* reactos/lib/gdi32/misc/stubs.c
*
@@ -2347,17 +2347,6 @@ GdiSetPixelFormat(HDC hdc,int ipfd)
return 0;
}
/*
* @unimplemented
*/
BOOL
STDCALL
GdiTransparentBlt(HDC hdcDst, int xDst, int yDst, int cxDst, int cyDst,HDC hdcSrc, int xSrc, int ySrc, int cxSrc, int cySrc,COLORREF TransColor)
{
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return 0;
}
/*
* @unimplemented
*/

101
reactos/lib/gdi32/objects/bitblt.c
View File

@@ -1,3 +1,15 @@
/* $Id: bitblt.c,v 1.17 2004/02/14 00:31:39 sedwards Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: lib/gdi32/object/bitblt.c
* PURPOSE:
* PROGRAMMER:
*
* GdiTransparentBlt Copyright Kevin Koltzau
* adapted from WINE 2-13-04
*/
#ifdef UNICODE
#undef UNICODE
#endif
@@ -370,6 +382,95 @@ PolyPatBlt(HDC hDC,DWORD dwRop,PPATRECT pRects,int cRects,ULONG Reserved)
return NtGdiPolyPatBlt(hDC,dwRop,pRects,cRects,Reserved);
}
/******************************************************************************
* GdiTransparentBlt [GDI32.@]
*
* @implemented
*/
WINBOOL
STDCALL
GdiTransparentBlt( HDC hdcDst, int xDst, int yDst, int cxDst, int cyDst,
HDC hdcSrc, int xSrc, int ySrc, int cxSrc, int cySrc,
COLORREF TransColor )
{
BOOL ret = FALSE;
HDC hdcWork;
HBITMAP bmpWork;
HGDIOBJ oldWork;
HDC hdcMask = NULL;
HBITMAP bmpMask = NULL;
HBITMAP oldMask = NULL;
COLORREF oldBackground;
COLORREF oldForeground;
int oldStretchMode;
if(cxDst < 0 || cyDst < 0 || cxSrc < 0 || cySrc < 0) {
DPRINT("Can not mirror\n");
return FALSE;
}
oldBackground = SetBkColor(hdcDst, RGB(255,255,255));
oldForeground = SetTextColor(hdcDst, RGB(0,0,0));
/* Stretch bitmap */
oldStretchMode = GetStretchBltMode(hdcSrc);
if(oldStretchMode == BLACKONWHITE || oldStretchMode == WHITEONBLACK)
SetStretchBltMode(hdcSrc, COLORONCOLOR);
hdcWork = CreateCompatibleDC(hdcDst);
bmpWork = CreateCompatibleBitmap(hdcDst, cxDst, cyDst);
oldWork = SelectObject(hdcWork, bmpWork);
if(!StretchBlt(hdcWork, 0, 0, cxDst, cyDst, hdcSrc, xSrc, ySrc, cxSrc, cySrc, SRCCOPY)) {
DPRINT("Failed to stretch\n");
goto error;
}
SetBkColor(hdcWork, TransColor);
/* Create mask */
hdcMask = CreateCompatibleDC(hdcDst);
bmpMask = CreateCompatibleBitmap(hdcMask, cxDst, cyDst);
oldMask = SelectObject(hdcMask, bmpMask);
if(!BitBlt(hdcMask, 0, 0, cxDst, cyDst, hdcWork, 0, 0, SRCCOPY)) {
DPRINT("Failed to create mask\n");
goto error;
}
/* Replace transparent color with black */
SetBkColor(hdcWork, RGB(0,0,0));
SetTextColor(hdcWork, RGB(255,255,255));
if(!BitBlt(hdcWork, 0, 0, cxDst, cyDst, hdcMask, 0, 0, SRCAND)) {
DPRINT("Failed to mask out background\n");
goto error;
}
/* Replace non-transparent area on destination with black */
if(!BitBlt(hdcDst, xDst, yDst, cxDst, cyDst, hdcMask, 0, 0, SRCAND)) {
DPRINT("Failed to clear destination area\n");
goto error;
}
/* Draw the image */
if(!BitBlt(hdcDst, xDst, yDst, cxDst, cyDst, hdcWork, 0, 0, SRCPAINT)) {
DPRINT("Failed to paint image\n");
goto error;
}
ret = TRUE;
error:
SetStretchBltMode(hdcSrc, oldStretchMode);
SetBkColor(hdcDst, oldBackground);
SetTextColor(hdcDst, oldForeground);
if(hdcWork) {
SelectObject(hdcWork, oldWork);
DeleteDC(hdcWork);
}
if(bmpWork) DeleteObject(bmpWork);
if(hdcMask) {
SelectObject(hdcMask, oldMask);
DeleteDC(hdcMask);
}
if(bmpMask) DeleteObject(bmpMask);
return ret;
}
/*