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124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* $Xorg: GetImage.c,v 1.4 2001/02/09 02:03:33 xorgcvs Exp $ */
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/*
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Copyright 1986, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*/
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/* $XFree86: xc/lib/X11/GetImage.c,v 1.4 2001/12/14 19:54:00 dawes Exp $ */
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#define NEED_REPLIES
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#include "Xlibint.h"
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#include <X11/Xutil.h> /* for XDestroyImage */
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#include "ImUtil.h"
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#define ROUNDUP(nbytes, pad) (((((nbytes) - 1) + (pad)) / (pad)) * (pad))
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static unsigned int Ones( /* HACKMEM 169 */
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unsigned long mask)
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{
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register unsigned long y;
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y = (mask >> 1) &033333333333;
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y = mask - y - ((y >>1) & 033333333333);
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return ((unsigned int) (((y + (y >> 3)) & 030707070707) % 077));
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}
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XImage *XGetImage (dpy, d, x, y, width, height, plane_mask, format)
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register Display *dpy;
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Drawable d;
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int x, y;
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unsigned int width, height;
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unsigned long plane_mask;
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int format; /* either XYPixmap or ZPixmap */
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{
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xGetImageReply rep;
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register xGetImageReq *req;
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char *data;
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long nbytes;
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XImage *image;
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LockDisplay(dpy);
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GetReq (GetImage, req);
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/*
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* first set up the standard stuff in the request
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*/
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req->drawable = d;
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req->x = x;
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req->y = y;
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req->width = width;
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req->height = height;
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req->planeMask = plane_mask;
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req->format = format;
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if (_XReply (dpy, (xReply *) &rep, 0, xFalse) == 0 ||
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rep.length == 0) {
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UnlockDisplay(dpy);
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SyncHandle();
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return (XImage *)NULL;
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}
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nbytes = (long)rep.length << 2;
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data = (char *) Xmalloc((unsigned) nbytes);
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if (! data) {
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_XEatData(dpy, (unsigned long) nbytes);
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UnlockDisplay(dpy);
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SyncHandle();
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return (XImage *) NULL;
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}
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_XReadPad (dpy, data, nbytes);
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if (format == XYPixmap)
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image = XCreateImage(dpy, _XVIDtoVisual(dpy, rep.visual),
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Ones (plane_mask &
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(((unsigned long)0xFFFFFFFF) >> (32 - rep.depth))),
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format, 0, data, width, height, dpy->bitmap_pad, 0);
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else /* format == ZPixmap */
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image = XCreateImage (dpy, _XVIDtoVisual(dpy, rep.visual),
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rep.depth, ZPixmap, 0, data, width, height,
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_XGetScanlinePad(dpy, (int) rep.depth), 0);
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if (!image)
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Xfree(data);
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UnlockDisplay(dpy);
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SyncHandle();
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return (image);
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}
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XImage *XGetSubImage(dpy, d, x, y, width, height, plane_mask, format,
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dest_image, dest_x, dest_y)
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register Display *dpy;
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Drawable d;
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int x, y;
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unsigned int width, height;
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unsigned long plane_mask;
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int format; /* either XYPixmap or ZPixmap */
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XImage *dest_image;
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int dest_x, dest_y;
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{
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XImage *temp_image;
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temp_image = XGetImage(dpy, d, x, y, width, height,
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plane_mask, format);
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if (!temp_image)
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return (XImage *)NULL;
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_XSetImage(temp_image, dest_image, dest_x, dest_y);
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XDestroyImage(temp_image);
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return (dest_image);
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}
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