/* * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include <stdio.h> #include "x11drv.h" /*********************************************************************** * 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; unsigned 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)) { int j; /* need to start from the end */ for (j = data->rdh.nCount-1; j >= 0; j--) { tmp = rect[j]; xrect[j].x = tmp.left; xrect[j].y = tmp.top; xrect[j].width = tmp.right - tmp.left; xrect[j].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 vis_rgn, HRGN clip_rgn ) { RGNDATA *data; CombineRgn( physDev->region, vis_rgn, clip_rgn, clip_rgn ? RGN_AND : RGN_COPY ); if (!(data = X11DRV_GetRegionData( physDev->region, 0 ))) return; wine_tsx11_lock(); XSetClipRectangles( gdi_display, physDev->gc, physDev->dc_rect.left, physDev->dc_rect.top, (XRectangle *)data->Buffer, data->rdh.nCount, YXBanded ); wine_tsx11_unlock(); HeapFree( GetProcessHeap(), 0, data ); }