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/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
/* $Id$ */
#include "libgraph.h"
#include "image.h"
#include <alloc.h>
#include <memory.h>
value caml_gr_dump_image(value image)
{
int width, height, i, j;
XImage * idata, * imask;
value m = Val_unit;
Begin_roots2(image, m);
caml_gr_check_open();
width = Width_im(image);
height = Height_im(image);
m = alloc(height, 0);
for (i = 0; i < height; i++) {
value v = alloc(width, 0);
modify(&Field(m, i), v);
}
idata =
XGetImage(caml_gr_display, Data_im(image), 0, 0, width, height, (-1), ZPixmap);
for (i = 0; i < height; i++)
for (j = 0; j < width; j++)
Field(Field(m, i), j) = Val_int(caml_gr_rgb_pixel(XGetPixel(idata, j, i)));
XDestroyImage(idata);
if (Mask_im(image) != None) {
imask =
XGetImage(caml_gr_display, Mask_im(image), 0, 0, width, height, 1, ZPixmap);
for (i = 0; i < height; i++)
for (j = 0; j < width; j++)
if (XGetPixel(imask, j, i) == 0)
Field(Field(m, i), j) = Val_int(Transparent);
XDestroyImage(imask);
}
End_roots();
return m;
}
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