Sweden-Number/graphics/x11drv/clipping.c

232 lines
7.4 KiB
C

/*
* X11DRV clipping functions
*
* Copyright 1998 Huw Davies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "ts_xlib.h"
#include <stdio.h>
#include "gdi.h"
#include "x11drv.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(x11drv);
/***********************************************************************
* X11DRV_GetRegionData
*
* Calls GetRegionData on the given region and converts the rectangle
* array to XRectangle format. The returned buffer must be freed by
* caller using HeapFree(GetProcessHeap(),...).
* If hdc_lptodp is not 0, the rectangles are converted through LPtoDP.
*/
RGNDATA *X11DRV_GetRegionData( HRGN hrgn, HDC hdc_lptodp )
{
RGNDATA *data;
DWORD size;
int i;
RECT *rect, tmp;
XRectangle *xrect;
if (!(size = GetRegionData( hrgn, 0, NULL ))) return NULL;
if (sizeof(XRectangle) > sizeof(RECT))
{
/* add extra size for XRectangle array */
int count = (size - sizeof(RGNDATAHEADER)) / sizeof(RECT);
size += count * (sizeof(XRectangle) - sizeof(RECT));
}
if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return NULL;
if (!GetRegionData( hrgn, size, data ))
{
HeapFree( GetProcessHeap(), 0, data );
return NULL;
}
rect = (RECT *)data->Buffer;
xrect = (XRectangle *)data->Buffer;
if (hdc_lptodp) /* map to device coordinates */
{
LPtoDP( hdc_lptodp, (POINT *)rect, data->rdh.nCount * 2 );
for (i = 0; i < data->rdh.nCount; i++)
{
if (rect[i].right < rect[i].left)
{
INT tmp = rect[i].right;
rect[i].right = rect[i].left;
rect[i].left = tmp;
}
if (rect[i].bottom < rect[i].top)
{
INT tmp = rect[i].bottom;
rect[i].bottom = rect[i].top;
rect[i].top = tmp;
}
}
}
if (sizeof(XRectangle) > sizeof(RECT))
{
/* need to start from the end */
for (i = data->rdh.nCount-1; i >=0; i--)
{
tmp = rect[i];
xrect[i].x = tmp.left;
xrect[i].y = tmp.top;
xrect[i].width = tmp.right - tmp.left;
xrect[i].height = tmp.bottom - tmp.top;
}
}
else
{
for (i = 0; i < data->rdh.nCount; i++)
{
tmp = rect[i];
xrect[i].x = tmp.left;
xrect[i].y = tmp.top;
xrect[i].width = tmp.right - tmp.left;
xrect[i].height = tmp.bottom - tmp.top;
}
}
return data;
}
/***********************************************************************
* X11DRV_SetDeviceClipping
*/
void X11DRV_SetDeviceClipping( X11DRV_PDEVICE *physDev, HRGN hrgn )
{
RGNDATA *data;
if (!(data = X11DRV_GetRegionData( hrgn, 0 ))) return;
TSXSetClipRectangles( gdi_display, physDev->gc, 0, 0,
(XRectangle *)data->Buffer, data->rdh.nCount, YXBanded );
HeapFree( GetProcessHeap(), 0, data );
}
/***********************************************************************
* X11DRV_SetDrawable
*
* Set the drawable, clipping mode and origin for a DC.
*/
void X11DRV_SetDrawable( HDC hdc, Drawable drawable, int mode, int org_x, int org_y )
{
DC *dc = DC_GetDCPtr( hdc );
if (dc)
{
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
/*
* This function change the coordinate system (DCOrgX,DCOrgY)
* values. When it moves the origin, other data like the current clipping
* region will not be moved to that new origin. In the case of DCs that are class
* or window DCs that clipping region might be a valid value from a previous use
* of the DC and changing the origin of the DC without moving the clip region
* results in a clip region that is not placed properly in the DC.
* This code will save the dc origin, let the SetDrawable
* modify the origin and reset the clipping. When the clipping is set,
* it is moved according to the new DC origin.
*/
if (dc->hClipRgn) OffsetRgn( dc->hClipRgn, org_x - dc->DCOrgX, org_y - dc->DCOrgY );
dc->DCOrgX = org_x;
dc->DCOrgY = org_y;
physDev->drawable = drawable;
TSXSetSubwindowMode( gdi_display, physDev->gc, mode );
if(physDev->xrender)
X11DRV_XRender_UpdateDrawable( physDev );
GDI_ReleaseObj( hdc );
}
}
/***********************************************************************
* X11DRV_StartGraphicsExposures
*
* Set the DC in graphics exposures mode
*/
void X11DRV_StartGraphicsExposures( HDC hdc )
{
DC *dc = DC_GetDCPtr( hdc );
if (dc)
{
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
TSXSetGraphicsExposures( gdi_display, physDev->gc, True );
physDev->exposures = 0;
GDI_ReleaseObj( hdc );
}
}
/***********************************************************************
* X11DRV_EndGraphicsExposures
*
* End the graphics exposures mode and process the events
*/
void X11DRV_EndGraphicsExposures( HDC hdc, HRGN hrgn )
{
HRGN tmp = 0;
DC *dc = DC_GetDCPtr( hdc );
if (dc)
{
XEvent event;
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
SetRectRgn( hrgn, 0, 0, 0, 0 );
wine_tsx11_lock();
XSetGraphicsExposures( gdi_display, physDev->gc, False );
if (physDev->exposures)
{
XSync( gdi_display, False );
for (;;)
{
XWindowEvent( gdi_display, physDev->drawable, ~0, &event );
if (event.type == NoExpose) break;
if (event.type == GraphicsExpose)
{
int x = event.xgraphicsexpose.x - dc->DCOrgX;
int y = event.xgraphicsexpose.y - dc->DCOrgY;
TRACE( "got %d,%d %dx%d count %d\n",
x, y, event.xgraphicsexpose.width, event.xgraphicsexpose.height,
event.xgraphicsexpose.count );
if (!tmp) tmp = CreateRectRgn( 0, 0, 0, 0 );
SetRectRgn( tmp, x, y,
x + event.xgraphicsexpose.width,
y + event.xgraphicsexpose.height );
CombineRgn( hrgn, hrgn, tmp, RGN_OR );
if (!event.xgraphicsexpose.count) break;
}
else
{
ERR( "got unexpected event %d\n", event.type );
break;
}
if (tmp) DeleteObject( tmp );
}
}
wine_tsx11_unlock();
GDI_ReleaseObj( hdc );
}
}