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- /* $XConsortium: XWrBitF.c,v 1.9 91/02/01 16:34:58 gildea Exp $ */
- /* Copyright, 1987, Massachusetts Institute of Technology */
-
- /*
- 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, and that the name of M.I.T. not be used in advertising or
- publicity pertaining to distribution of the software without specific,
- written prior permission. M.I.T. makes no representations about the
- suitability of this software for any purpose. It is provided "as is"
- without express or implied warranty.
- */
-
- #include "Xlibint.h"
- #include <X11/Xos.h>
- #include "Xutil.h"
- #include <stdio.h>
-
- #define ERR_RETURN 0
-
- static char *Format_Image(image, resultsize)
- XImage *image;
- int *resultsize;
- {
- register int x, c, b;
- register char *ptr;
- int y;
- char *data;
- int width, height;
- int bytes_per_line;
-
- width = image->width;
- height = image->height;
-
- bytes_per_line = (width+7)/8;
- *resultsize = bytes_per_line * height; /* Calculate size of data */
-
- data = (char *) Xmalloc( *resultsize ); /* Get space for data */
- if (!data)
- return(ERR_RETURN);
-
- /*
- * The slow but robust brute force method of converting the image:
- */
- ptr = data;
- c = 0; b=1;
- for (y=0; y<height; y++) {
- for (x=0; x<width;) {
- if (XGetPixel(image, x, y))
- c |= b;
- b <<= 1;
- if (!(++x & 7)) {
- *(ptr++)=c;
- c=0; b=1;
- }
- }
- if (x & 7) {
- *(ptr++)=c;
- c=0; b=1;
- }
- }
-
- return(data);
- }
-
- #define BYTES_PER_OUTPUT_LINE 12
-
- #if NeedFunctionPrototypes
- int XWriteBitmapFile(
- Display *display,
- _Xconst char *filename,
- Pixmap bitmap,
- unsigned int width,
- unsigned int height,
- int x_hot,
- int y_hot)
- #else
- int XWriteBitmapFile(display, filename, bitmap, width, height, x_hot, y_hot)
- Display *display;
- char *filename;
- Pixmap bitmap;
- unsigned int width, height;
- int x_hot, y_hot;
- #endif
- {
- char *data, *ptr;
- int size, byte;
- int c;
- XImage *image;
- FILE *stream;
- char *name;
-
- if (!(name = rindex(filename, '/')))
- name = (char *)filename;
- else
- name++;
-
- if (!(stream = fopen(filename, "w")))
- return(BitmapOpenFailed);
-
- /* Convert bitmap to an image */
- image = XGetImage(display, bitmap, 0,0,width, height, 1L, XYPixmap);
-
- /* Get standard format for data */
- data = Format_Image(image, &size);
- XDestroyImage(image);
- if (!data) {
- fclose(stream);
- return(BitmapNoMemory);
- }
-
- /* Write out standard header */
- fprintf(stream, "#define %s_width %d\n", name, width);
- fprintf(stream, "#define %s_height %d\n", name, height);
- if (x_hot != -1) {
- fprintf(stream, "#define %s_x_hot %d\n", name, x_hot);
- fprintf(stream, "#define %s_y_hot %d\n", name, y_hot);
- }
-
- /* Print out the data itself */
- fprintf(stream, "static char %s_bits[] = {", name);
- for (byte=0, ptr=data; byte<size; byte++, ptr++) {
- if (!byte)
- fprintf(stream, "\n ");
- else if (!(byte % BYTES_PER_OUTPUT_LINE))
- fprintf(stream, ",\n ");
- else
- fprintf(stream, ", ");
- c = *ptr;
- if (c<0)
- c += 256;
- fprintf(stream, "0x%02x", c);
- }
- fprintf(stream, "};\n");
-
- Xfree(data);
- fclose(stream);
- return(BitmapSuccess);
- }
-