Sweden-Number/graphics/psdrv/clipping.c

87 lines
2.1 KiB
C

/*
* PostScript clipping functions
*
* Copyright 1999 Luc Tourangau
*
*/
#include "gdi.h"
#include "psdrv.h"
#include "debugtools.h"
#include "winbase.h"
DEFAULT_DEBUG_CHANNEL(psdrv)
/***********************************************************************
* PSDRV_SetDeviceClipping
*/
VOID PSDRV_SetDeviceClipping( DC *dc )
{
CHAR szArrayName[] = "clippath";
DWORD size;
RGNDATA *rgndata;
TRACE("hdc=%04x\n", dc->hSelf);
if (dc->w.hGCClipRgn == 0) {
ERR("Rgn is 0. Please report this.\n");
return;
}
size = GetRegionData(dc->w.hGCClipRgn, 0, NULL);
if(!size) {
ERR("Invalid region\n");
return;
}
rgndata = HeapAlloc( GetProcessHeap(), 0, size );
if(!rgndata) {
ERR("Can't allocate buffer\n");
return;
}
GetRegionData(dc->w.hGCClipRgn, size, rgndata);
PSDRV_WriteInitClip(dc);
/* check for NULL region */
if (rgndata->rdh.nCount == 0)
{
/* set an empty clip path. */
PSDRV_WriteRectClip(dc, 0, 0, 0, 0);
}
/* optimize when it is a simple region */
else if (rgndata->rdh.nCount == 1)
{
RECT *pRect = (RECT *)rgndata->Buffer;
PSDRV_WriteRectClip(dc, pRect->left, pRect->top,
pRect->right - pRect->left,
pRect->bottom - pRect->top);
}
else
{
INT i;
RECT *pRect = (RECT *)rgndata->Buffer;
PSDRV_WriteArrayDef(dc, szArrayName, rgndata->rdh.nCount * 4);
for (i = 0; i < rgndata->rdh.nCount; i++, pRect++)
{
PSDRV_WriteArrayPut(dc, szArrayName, i * 4,
pRect->left);
PSDRV_WriteArrayPut(dc, szArrayName, i * 4 + 1,
pRect->top);
PSDRV_WriteArrayPut(dc, szArrayName, i * 4 + 2,
pRect->right - pRect->left);
PSDRV_WriteArrayPut(dc, szArrayName, i * 4 + 3,
pRect->bottom - pRect->top);
}
PSDRV_WriteRectClip2(dc, szArrayName);
}
HeapFree( GetProcessHeap(), 0, rgndata );
return;
}