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Implementation of gdi32.GdiTransparentBlt and msimg32.TransparentBlt.

This commit is contained in:
Kevin Koltzau 2004-02-02 23:10:35 +00:00 committed by Alexandre Julliard
parent 2fba6872ad
commit 4a4b5d407c
5 changed files with 89 additions and 16 deletions
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1
dlls/gdi/gdi32.spec
View File

@ -167,6 +167,7 @@
@ stub GdiSetAttrs
@ stdcall GdiSetBatchLimit(long)
@ stub GdiSetServerAttr
@ stdcall GdiTransparentBlt(long long long long long long long long long long long)
@ stub GdiWinWatchClose
@ stub GdiWinWatchDidStatusChange
@ stub GdiWinWatchGetClipList

2
dlls/msimg32/Makefile.in
View File

@ -3,7 +3,7 @@ TOPOBJDIR = ../..
SRCDIR = @srcdir@
VPATH = @srcdir@
MODULE = msimg32.dll
IMPORTS = kernel32
IMPORTS = gdi32 kernel32
C_SRCS = msimg32_main.c

2
dlls/msimg32/msimg32.spec
View File

@ -1,5 +1,5 @@
@ stdcall AlphaBlend(long long long long long long long long long long long)
@ stub DllInitialize
@ stdcall GradientFill(long ptr long ptr long long) gdi32.GdiGradientFill
@ stdcall TransparentBlt(long long long long long long long long long long long)
@ stdcall TransparentBlt(long long long long long long long long long long long) gdi32.GdiTransparentBlt
@ stdcall vSetDdrawflag()

14
dlls/msimg32/msimg32_main.c
View File

@ -38,20 +38,6 @@ BOOL WINAPI AlphaBlend( HDC hdcDest, int xDest, int yDest, int widthDest, int he
return FALSE;
}
/******************************************************************************
* TransparentBlt (MSIMG32.@)
*/
BOOL WINAPI TransparentBlt( HDC hdcDest, int xDest, int yDest, int widthDest, int heightDst,
HDC hdcSrc, int xSrc, int ySrc, int widthSrc, int heightSrc,
UINT crTransparent )
{
FIXME("stub: TransparentBlt from %p to %p\n", hdcSrc, hdcDest );
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return FALSE;
}
/******************************************************************************
* vSetDdrawflag (MSIMG32.@)
*/

86
graphics/bitblt.c
View File

@ -309,6 +309,92 @@ BOOL WINAPI MaskBlt(HDC hdcDest, INT nXDest, INT nYDest,
return TRUE;
}
/******************************************************************************
* GdiTransparentBlt [GDI32.@]
*/
BOOL WINAPI GdiTransparentBlt( HDC hdcDest, int xDest, int yDest, int widthDest, int heightDest,
HDC hdcSrc, int xSrc, int ySrc, int widthSrc, int heightSrc,
UINT crTransparent )
{
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(widthDest < 0 || heightDest < 0 || widthSrc < 0 || heightSrc < 0) {
TRACE("Can not mirror\n");
return FALSE;
}
oldBackground = SetBkColor(hdcDest, RGB(255,255,255));
oldForeground = SetTextColor(hdcDest, RGB(0,0,0));
/* Stretch bitmap */
oldStretchMode = GetStretchBltMode(hdcSrc);
if(oldStretchMode == BLACKONWHITE || oldStretchMode == WHITEONBLACK)
SetStretchBltMode(hdcSrc, COLORONCOLOR);
hdcWork = CreateCompatibleDC(hdcDest);
bmpWork = CreateCompatibleBitmap(hdcDest, widthDest, heightDest);
oldWork = SelectObject(hdcWork, bmpWork);
if(!StretchBlt(hdcWork, 0, 0, widthDest, heightDest, hdcSrc, xSrc, ySrc, widthSrc, heightSrc, SRCCOPY)) {
TRACE("Failed to stretch\n");
goto error;
}
SetBkColor(hdcWork, crTransparent);
/* Create mask */
hdcMask = CreateCompatibleDC(hdcDest);
bmpMask = CreateCompatibleBitmap(hdcMask, widthDest, heightDest);
oldMask = SelectObject(hdcMask, bmpMask);
if(!BitBlt(hdcMask, 0, 0, widthDest, heightDest, hdcWork, 0, 0, SRCCOPY)) {
TRACE("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, widthDest, heightDest, hdcMask, 0, 0, SRCAND)) {
TRACE("Failed to mask out background\n");
goto error;
}
/* Replace non-transparent area on destination with black */
if(!BitBlt(hdcDest, 0, 0, widthDest, heightDest, hdcMask, 0, 0, SRCAND)) {
TRACE("Failed to clear destination area\n");
goto error;
}
/* Draw the image */
if(!BitBlt(hdcDest, xDest, yDest, widthDest, heightDest, hdcWork, 0, 0, SRCPAINT)) {
TRACE("Failed to paint image\n");
goto error;
}
ret = TRUE;
error:
SetStretchBltMode(hdcSrc, oldStretchMode);
SetBkColor(hdcDest, oldBackground);
SetTextColor(hdcDest, 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;
}
/*********************************************************************
* PlgBlt [GDI32.@]
*