Sweden-Number/graphics/x11drv/clipping.c

66 lines
1.6 KiB
C

/*
* X11DRV clipping functions
*
* Copyright 1998 Huw Davies
*/
#include <stdio.h>
#include "dc.h"
#include "x11drv.h"
#include "region.h"
#include "debug.h"
#include "heap.h"
/***********************************************************************
* X11DRV_SetDeviceClipping
* Copy RECT32s to a temporary buffer of XRectangles and call
* TSXSetClipRectangles().
*
* Could write using GetRegionData but this would be slower.
*/
void X11DRV_SetDeviceClipping( DC * dc )
{
XRectangle *pXrect;
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
RGNOBJ *obj = (RGNOBJ *) GDI_GetObjPtr(dc->w.hGCClipRgn, REGION_MAGIC);
if (!obj)
{
ERR(x11drv, "Rgn is 0. Please report this.\n");
return;
}
if (obj->rgn->numRects > 0)
{
XRectangle *pXr;
RECT32 *pRect = obj->rgn->rects;
RECT32 *pEndRect = obj->rgn->rects + obj->rgn->numRects;
pXrect = HeapAlloc( GetProcessHeap(), 0,
sizeof(*pXrect) * obj->rgn->numRects );
if(!pXrect)
{
WARN(x11drv, "Can't alloc buffer\n");
return;
}
for(pXr = pXrect; pRect < pEndRect; pRect++, pXr++)
{
pXr->x = pRect->left;
pXr->y = pRect->top;
pXr->width = pRect->right - pRect->left;
pXr->height = pRect->bottom - pRect->top;
}
}
else
pXrect = NULL;
TSXSetClipRectangles( display, physDev->gc, 0, 0,
pXrect, obj->rgn->numRects, YXBanded );
if(pXrect)
HeapFree( GetProcessHeap(), 0, pXrect );
GDI_HEAP_UNLOCK( dc->w.hGCClipRgn );
}