Nikolay Sivov : gdi32: PlgBlt implementation.
Alexandre Julliard
julliard at winehq.org
Wed Apr 2 06:55:38 CDT 2008
Module: wine
Branch: master
Commit: caafb52559235dae5903b36e9c1f5a9e1f5ab69e
URL: http://source.winehq.org/git/wine.git/?a=commit;h=caafb52559235dae5903b36e9c1f5a9e1f5ab69e
Author: Nikolay Sivov <bunglehead at gmail.com>
Date: Thu Mar 27 01:59:34 2008 +0300
gdi32: PlgBlt implementation.
---
dlls/gdi32/bitblt.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 74 insertions(+), 3 deletions(-)
diff --git a/dlls/gdi32/bitblt.c b/dlls/gdi32/bitblt.c
index 4a814b7..e91ae53 100644
--- a/dlls/gdi32/bitblt.c
+++ b/dlls/gdi32/bitblt.c
@@ -20,6 +20,11 @@
#include <stdarg.h>
+#include <math.h>
+#ifdef HAVE_FLOAT_H
+#include <float.h>
+#endif
+
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
@@ -522,9 +527,75 @@ BOOL WINAPI GdiAlphaBlend(HDC hdcDst, int xDst, int yDst, int widthDst, int heig
*
*/
BOOL WINAPI PlgBlt( HDC hdcDest, const POINT *lpPoint,
- HDC hdcSrc, INT nXDest, INT nYDest, INT nWidth,
+ HDC hdcSrc, INT nXSrc, INT nYSrc, INT nWidth,
INT nHeight, HBITMAP hbmMask, INT xMask, INT yMask)
{
- FIXME("PlgBlt, stub\n");
- return 1;
+ int oldgMode;
+ /* parallelogram coords */
+ POINT plg[3];
+ /* rect coords */
+ POINT rect[3];
+ XFORM xf;
+ XFORM SrcXf;
+ XFORM oldDestXf;
+ FLOAT det;
+
+ /* save actual mode, set GM_ADVANCED */
+ oldgMode = SetGraphicsMode(hdcDest,GM_ADVANCED);
+ if (oldgMode == 0)
+ return FALSE;
+
+ memcpy(plg,lpPoint,sizeof(POINT)*3);
+ rect[0].x = nXSrc;
+ rect[0].y = nYSrc;
+ rect[1].x = nXSrc + nWidth;
+ rect[1].y = nYSrc;
+ rect[2].x = nXSrc;
+ rect[2].y = nYSrc + nHeight;
+ /* calc XFORM matrix to transform hdcDest -> hdcSrc (parallelogram to rectangle) */
+ /* determinant */
+ det = (FLOAT)(rect[1].x*(rect[2].y - rect[0].y) - rect[2].x*(rect[1].y - rect[0].y) - rect[0].x*(rect[2].y - rect[1].y));
+
+ if (fabs(det) < 1e-5)
+ {
+ SetGraphicsMode(hdcDest,oldgMode);
+ return FALSE;
+ }
+
+ TRACE("hdcSrc=%p %d,%d,%dx%d -> hdcDest=%p %d,%d,%d,%d,%d,%d\n",
+ hdcSrc, nXSrc, nYSrc, nWidth, nHeight, hdcDest, plg[0].x, plg[0].y, plg[1].x, plg[1].y, plg[2].x, plg[2].y);
+
+ /* X components */
+ xf.eM11 = (plg[1].x*(rect[2].y - rect[0].y) - plg[2].x*(rect[1].y - rect[0].y) - plg[0].x*(rect[2].y - rect[1].y)) / det;
+ xf.eM21 = (rect[1].x*(plg[2].x - plg[0].x) - rect[2].x*(plg[1].x - plg[0].x) - rect[0].x*(plg[2].x - plg[1].x)) / det;
+ xf.eDx = (rect[0].x*(rect[1].y*plg[2].x - rect[2].y*plg[1].x) -
+ rect[1].x*(rect[0].y*plg[2].x - rect[2].y*plg[0].x) +
+ rect[2].x*(rect[0].y*plg[1].x - rect[1].y*plg[0].x)
+ ) / det;
+
+ /* Y components */
+ xf.eM12 = (plg[1].y*(rect[2].y - rect[0].y) - plg[2].y*(rect[1].y - rect[0].y) - plg[0].y*(rect[2].y - rect[1].y)) / det;
+ xf.eM22 = (plg[1].x*(rect[2].y - rect[0].y) - plg[2].x*(rect[1].y - rect[0].y) - plg[0].x*(rect[2].y - rect[1].y)) / det;
+ xf.eDy = (rect[0].x*(rect[1].y*plg[2].y - rect[2].y*plg[1].y) -
+ rect[1].x*(rect[0].y*plg[2].y - rect[2].y*plg[0].y) +
+ rect[2].x*(rect[0].y*plg[1].y - rect[1].y*plg[0].y)
+ ) / det;
+
+ GetWorldTransform(hdcSrc,&SrcXf);
+ CombineTransform(&xf,&xf,&SrcXf);
+
+ /* save actual dest transform */
+ GetWorldTransform(hdcDest,&oldDestXf);
+
+ SetWorldTransform(hdcDest,&xf);
+ /* now destination and source DCs use same coords */
+ MaskBlt(hdcDest,nXSrc,nYSrc,nWidth,nHeight,
+ hdcSrc, nXSrc,nYSrc,
+ hbmMask,xMask,yMask,
+ SRCCOPY);
+ /* restore dest DC */
+ SetWorldTransform(hdcDest,&oldDestXf);
+ SetGraphicsMode(hdcDest,oldgMode);
+
+ return TRUE;
}
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