1 |
#include "EXTERN.h" |
2 |
#include "perl.h" |
3 |
#include "XSUB.h" |
4 |
|
5 |
#include <gdk-pixbuf/gdk-pixbuf.h> |
6 |
|
7 |
#include <gperl.h> |
8 |
#include <gtk2perl.h> |
9 |
|
10 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow |
11 |
|
12 |
PROTOTYPES: ENABLE |
13 |
|
14 |
GdkPixbuf_noinc * |
15 |
transpose (GdkPixbuf *pb) |
16 |
CODE: |
17 |
{ |
18 |
int w = gdk_pixbuf_get_width (pb); |
19 |
int h = gdk_pixbuf_get_height (pb); |
20 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
21 |
int x, y, i; |
22 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
23 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
24 |
|
25 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); |
26 |
|
27 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
28 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
29 |
|
30 |
for (y = 0; y < h; y++) |
31 |
for (x = 0; x < w; x++) |
32 |
for (i = 0; i < bpp; i++) |
33 |
dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; |
34 |
} |
35 |
OUTPUT: |
36 |
RETVAL |
37 |
|
38 |
GdkPixbuf_noinc * |
39 |
flop (GdkPixbuf *pb) |
40 |
CODE: |
41 |
{ |
42 |
int w = gdk_pixbuf_get_width (pb); |
43 |
int h = gdk_pixbuf_get_height (pb); |
44 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
45 |
int x, y, i; |
46 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
47 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
48 |
|
49 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); |
50 |
|
51 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
52 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
53 |
|
54 |
for (y = 0; y < h; y++) |
55 |
for (x = 0; x < w; x++) |
56 |
for (i = 0; i < bpp; i++) |
57 |
dst[(w - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
58 |
} |
59 |
OUTPUT: |
60 |
RETVAL |
61 |
|
62 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
63 |
|
64 |
GdkPixbuf_noinc * |
65 |
p7_to_pb (int w, int h, guchar *src) |
66 |
CODE: |
67 |
{ |
68 |
int x, y; |
69 |
guchar *dst, *d; |
70 |
int dstr; |
71 |
|
72 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
73 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
74 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
75 |
|
76 |
for (y = 0; y < h; y++) |
77 |
for (d = dst + y * dstr, x = 0; x < w; x++) |
78 |
{ |
79 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
80 |
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
81 |
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
82 |
|
83 |
src++; |
84 |
} |
85 |
} |
86 |
OUTPUT: |
87 |
RETVAL |
88 |
|
89 |
SV * |
90 |
pb_to_p7 (GdkPixbuf *pb) |
91 |
CODE: |
92 |
{ |
93 |
int w = gdk_pixbuf_get_width (pb); |
94 |
int h = gdk_pixbuf_get_height (pb); |
95 |
int x, y; |
96 |
guchar *dst; |
97 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
98 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
99 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
100 |
|
101 |
RETVAL = newSV (w * h); |
102 |
SvPOK_only (RETVAL); |
103 |
SvCUR_set (RETVAL, w * h); |
104 |
|
105 |
dst = SvPVX (RETVAL); |
106 |
|
107 |
for (y = 0; y < h; y++) |
108 |
{ |
109 |
/* use a very primitive form of error distribution. */ |
110 |
int er = 0, eg = 0, eb = 0; |
111 |
|
112 |
for (x = 0; x < w; x++) |
113 |
{ |
114 |
int r, g, b; |
115 |
guchar *p = src + x * bpp + y * sstr; |
116 |
|
117 |
r = ((p[0] + er) * 7 + 128) / 255; |
118 |
g = ((p[1] + eg) * 7 + 128) / 255; |
119 |
b = ((p[2] + eb) * 3 + 128) / 255; |
120 |
|
121 |
r = r > 7 ? 7 : r < 0 ? 0 : r; |
122 |
g = g > 7 ? 7 : g < 0 ? 0 : g; |
123 |
b = b > 3 ? 3 : b < 0 ? 0 : b; |
124 |
|
125 |
er += p[0] - (r * 255 + 4) / 7; |
126 |
eg += p[1] - (g * 255 + 4) / 7; |
127 |
eb += p[2] - (b * 255 + 2) / 3; |
128 |
|
129 |
*dst++ = r << 5 | g << 2 | b; |
130 |
} |
131 |
} |
132 |
} |
133 |
OUTPUT: |
134 |
RETVAL |
135 |
|
136 |
|
137 |
|