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Diffstat (limited to 'nx-X11/lib/src/GetImage.c')
| -rw-r--r-- | nx-X11/lib/src/GetImage.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/nx-X11/lib/src/GetImage.c b/nx-X11/lib/src/GetImage.c new file mode 100644 index 000000000..d80f6715f --- /dev/null +++ b/nx-X11/lib/src/GetImage.c @@ -0,0 +1,143 @@ +/* + +Copyright 1986, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" +#include <nx-X11/Xutil.h> /* for XDestroyImage */ +#include "ImUtil.h" +#include <limits.h> + +#define ROUNDUP(nbytes, pad) (((((nbytes) - 1) + (pad)) / (pad)) * (pad)) + +static unsigned int Ones( /* HACKMEM 169 */ + unsigned long mask) +{ + register unsigned long y; + + y = (mask >> 1) &033333333333; + y = mask - y - ((y >>1) & 033333333333); + return ((unsigned int) (((y + (y >> 3)) & 030707070707) % 077)); +} + +XImage *XGetImage ( + register Display *dpy, + Drawable d, + int x, + int y, + unsigned int width, + unsigned int height, + unsigned long plane_mask, + int format) /* either XYPixmap or ZPixmap */ +{ + xGetImageReply rep; + register xGetImageReq *req; + char *data; + unsigned long nbytes; + XImage *image; + int planes; + LockDisplay(dpy); + GetReq (GetImage, req); + /* + * first set up the standard stuff in the request + */ + req->drawable = d; + req->x = x; + req->y = y; + req->width = width; + req->height = height; + req->planeMask = plane_mask; + req->format = format; + + if (_XReply (dpy, (xReply *) &rep, 0, xFalse) == 0 || + rep.length == 0) { + UnlockDisplay(dpy); + SyncHandle(); + return (XImage *)NULL; + } + + if (rep.length < (INT_MAX >> 2)) { + nbytes = (unsigned long)rep.length << 2; + data = Xmalloc(nbytes); + } else + data = NULL; + if (! data) { + _XEatDataWords(dpy, rep.length); + UnlockDisplay(dpy); + SyncHandle(); + return (XImage *) NULL; + } + _XReadPad (dpy, data, nbytes); + if (format == XYPixmap) { + image = XCreateImage(dpy, _XVIDtoVisual(dpy, rep.visual), + Ones (plane_mask & + (((unsigned long)0xFFFFFFFF) >> (32 - rep.depth))), + format, 0, data, width, height, dpy->bitmap_pad, 0); + planes = image->depth; + } else { /* format == ZPixmap */ + image = XCreateImage (dpy, _XVIDtoVisual(dpy, rep.visual), + rep.depth, ZPixmap, 0, data, width, height, + _XGetScanlinePad(dpy, (int) rep.depth), 0); + planes = 1; + } + + if (!image) + Xfree(data); + if (planes < 1 || image->height < 1 || image->bytes_per_line < 1 || + INT_MAX / image->height <= image->bytes_per_line || + INT_MAX / planes <= image->height * image->bytes_per_line || + nbytes < planes * image->height * image->bytes_per_line) { + XDestroyImage(image); + image = NULL; + } + UnlockDisplay(dpy); + SyncHandle(); + return (image); +} + +XImage *XGetSubImage( + register Display *dpy, + Drawable d, + int x, + int y, + unsigned int width, + unsigned int height, + unsigned long plane_mask, + int format, /* either XYPixmap or ZPixmap */ + XImage *dest_image, + int dest_x, + int dest_y) +{ + XImage *temp_image; + temp_image = XGetImage(dpy, d, x, y, width, height, + plane_mask, format); + if (!temp_image) + return (XImage *)NULL; + _XSetImage(temp_image, dest_image, dest_x, dest_y); + XDestroyImage(temp_image); + return (dest_image); +} |