1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include "libgraph.h"
#include "image.h"
#include <alloc.h>
#include <memory.h>
static value gr_alloc_int_vect(size)
mlsize_t size;
{
value res;
mlsize_t i;
if (size <= Max_young_wosize) {
res = alloc(size, 0);
} else {
res = alloc_shr(size, 0);
}
for (i = 0; i < size; i++) {
Field(res, i) = Val_long(0);
}
return res;
}
value gr_dump_image(image)
value image;
{
int width, height, i, j;
XImage * idata, * imask;
Push_roots(root, 2);
#define im root[0]
#define m root[1]
gr_check_open();
im = image;
width = Width_im(im);
height = Height_im(im);
m = gr_alloc_int_vect(height);
for (i = 0; i < height; i++) {
value v = gr_alloc_int_vect(width);
modify(&Field(m, i), v);
}
idata =
XGetImage(grdisplay, Data_im(im), 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(gr_rgb_pixel(XGetPixel(idata, j, i)));
XDestroyImage(idata);
if (Mask_im(im) != None) {
imask =
XGetImage(grdisplay, Mask_im(im), 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);
}
Pop_roots();
return m;
#undef im
#undef m
}
|
