| 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 |
#define IW 80 |
| 11 |
|
| 12 |
#define RAND (seed = (seed + 7141) * 54773 % 134456) |
| 13 |
|
| 14 |
#define ELLIPSIS "\xe2\x80\xa6" |
| 15 |
|
| 16 |
static guint32 a85_val; |
| 17 |
static guint a85_cnt; |
| 18 |
static guchar a85_buf[80], *a85_ptr; |
| 19 |
|
| 20 |
static void |
| 21 |
a85_init (void) |
| 22 |
{ |
| 23 |
a85_cnt = 4; |
| 24 |
a85_ptr = a85_buf; |
| 25 |
} |
| 26 |
|
| 27 |
static void |
| 28 |
a85_push (PerlIO *fp, guchar c) |
| 29 |
{ |
| 30 |
a85_val = a85_val << 8 | c; |
| 31 |
|
| 32 |
if (!--a85_cnt) |
| 33 |
{ |
| 34 |
a85_cnt = 4; |
| 35 |
if (a85_val) |
| 36 |
{ |
| 37 |
a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
| 38 |
a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
| 39 |
a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
| 40 |
a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
| 41 |
a85_ptr[0] = (a85_val ) + 33; |
| 42 |
|
| 43 |
a85_ptr += 5; |
| 44 |
} |
| 45 |
else |
| 46 |
*a85_ptr++ = 'z'; |
| 47 |
|
| 48 |
if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
| 49 |
{ |
| 50 |
*a85_ptr++ = '\n'; |
| 51 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
| 52 |
a85_ptr = a85_buf; |
| 53 |
} |
| 54 |
} |
| 55 |
|
| 56 |
} |
| 57 |
|
| 58 |
a85_finish (PerlIO *fp) |
| 59 |
{ |
| 60 |
while (a85_cnt != 4) |
| 61 |
a85_push (fp, 0); |
| 62 |
|
| 63 |
*a85_ptr++ = '~'; // probably buggy end-marker |
| 64 |
*a85_ptr++ = '>'; // probably buggy end-marker |
| 65 |
*a85_ptr++ = '\n'; |
| 66 |
|
| 67 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
| 68 |
} |
| 69 |
|
| 70 |
///////////////////////////////////////////////////////////////////////////// |
| 71 |
|
| 72 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow |
| 73 |
|
| 74 |
PROTOTYPES: ENABLE |
| 75 |
|
| 76 |
GdkPixbuf_noinc * |
| 77 |
transpose (GdkPixbuf *pb) |
| 78 |
CODE: |
| 79 |
{ |
| 80 |
int w = gdk_pixbuf_get_width (pb); |
| 81 |
int h = gdk_pixbuf_get_height (pb); |
| 82 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
| 83 |
int x, y, i; |
| 84 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
| 85 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
| 86 |
|
| 87 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); |
| 88 |
|
| 89 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 90 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 91 |
|
| 92 |
for (y = 0; y < h; y++) |
| 93 |
for (x = 0; x < w; x++) |
| 94 |
for (i = 0; i < bpp; i++) |
| 95 |
dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; |
| 96 |
} |
| 97 |
OUTPUT: |
| 98 |
RETVAL |
| 99 |
|
| 100 |
GdkPixbuf_noinc * |
| 101 |
flop (GdkPixbuf *pb) |
| 102 |
CODE: |
| 103 |
{ |
| 104 |
int w = gdk_pixbuf_get_width (pb); |
| 105 |
int h = gdk_pixbuf_get_height (pb); |
| 106 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
| 107 |
int x, y, i; |
| 108 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
| 109 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
| 110 |
|
| 111 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); |
| 112 |
|
| 113 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 114 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 115 |
|
| 116 |
for (y = 0; y < h; y++) |
| 117 |
for (x = 0; x < w; x++) |
| 118 |
for (i = 0; i < bpp; i++) |
| 119 |
dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
| 120 |
} |
| 121 |
OUTPUT: |
| 122 |
RETVAL |
| 123 |
|
| 124 |
############################################################################# |
| 125 |
|
| 126 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
| 127 |
|
| 128 |
GdkPixbuf_noinc * |
| 129 |
p7_to_pb (int w, int h, guchar *src) |
| 130 |
CODE: |
| 131 |
{ |
| 132 |
int x, y; |
| 133 |
guchar *dst, *d; |
| 134 |
int dstr; |
| 135 |
|
| 136 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
| 137 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 138 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 139 |
|
| 140 |
for (y = 0; y < h; y++) |
| 141 |
for (d = dst + y * dstr, x = 0; x < w; x++) |
| 142 |
{ |
| 143 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
| 144 |
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
| 145 |
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
| 146 |
|
| 147 |
src++; |
| 148 |
} |
| 149 |
} |
| 150 |
OUTPUT: |
| 151 |
RETVAL |
| 152 |
|
| 153 |
SV * |
| 154 |
pb_to_p7 (GdkPixbuf *pb) |
| 155 |
CODE: |
| 156 |
{ |
| 157 |
int w = gdk_pixbuf_get_width (pb); |
| 158 |
int h = gdk_pixbuf_get_height (pb); |
| 159 |
int x, y; |
| 160 |
guchar *dst; |
| 161 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
| 162 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 163 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 164 |
int Er[IW], Eg[IW], Eb[IW]; |
| 165 |
int seed = 77; |
| 166 |
|
| 167 |
RETVAL = newSV (w * h); |
| 168 |
SvPOK_only (RETVAL); |
| 169 |
SvCUR_set (RETVAL, w * h); |
| 170 |
|
| 171 |
dst = SvPVX (RETVAL); |
| 172 |
|
| 173 |
memset (Er, 0, sizeof (int) * IW); |
| 174 |
memset (Eg, 0, sizeof (int) * IW); |
| 175 |
memset (Eb, 0, sizeof (int) * IW); |
| 176 |
|
| 177 |
/* some primitive error distribution + random dithering */ |
| 178 |
|
| 179 |
for (y = 0; y < h; y++) |
| 180 |
{ |
| 181 |
int er = 0, eg = 0, eb = 0; |
| 182 |
|
| 183 |
for (x = 0; x < w; x++) |
| 184 |
{ |
| 185 |
int r, g, b; |
| 186 |
guchar *p = src + x * bpp + y * sstr; |
| 187 |
|
| 188 |
r = ((p[0] + er + Er[x]) * 7 + 128) / 255; |
| 189 |
g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255; |
| 190 |
b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255; |
| 191 |
|
| 192 |
r = r > 7 ? 7 : r < 0 ? 0 : r; |
| 193 |
g = g > 7 ? 7 : g < 0 ? 0 : g; |
| 194 |
b = b > 3 ? 3 : b < 0 ? 0 : b; |
| 195 |
|
| 196 |
er += p[0] - (r * 255 + 4) / 7; |
| 197 |
eg += p[1] - (g * 255 + 4) / 7; |
| 198 |
eb += p[2] - (b * 255 + 2) / 3; |
| 199 |
|
| 200 |
Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; |
| 201 |
Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; |
| 202 |
Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; |
| 203 |
|
| 204 |
*dst++ = r << 5 | g << 2 | b; |
| 205 |
} |
| 206 |
} |
| 207 |
} |
| 208 |
OUTPUT: |
| 209 |
RETVAL |
| 210 |
|
| 211 |
############################################################################# |
| 212 |
|
| 213 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
| 214 |
|
| 215 |
void |
| 216 |
dump_pb (PerlIO *fp, GdkPixbuf *pb) |
| 217 |
CODE: |
| 218 |
{ |
| 219 |
int w = gdk_pixbuf_get_width (pb); |
| 220 |
int h = gdk_pixbuf_get_height (pb); |
| 221 |
int x, y, i; |
| 222 |
guchar *dst; |
| 223 |
int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
| 224 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 225 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 226 |
|
| 227 |
a85_init (); |
| 228 |
|
| 229 |
for (y = 0; y < h; y++) |
| 230 |
for (x = 0; x < w; x++) |
| 231 |
for (i = 0; i < 3; i++) |
| 232 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
| 233 |
|
| 234 |
a85_finish (fp); |
| 235 |
} |
| 236 |
|
| 237 |
|
| 238 |
|
| 239 |
|
