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 |
|
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#define RAND (seed = (seed + 7141) * 54773 % 134456) |
13 |
|
14 |
#define LINELENGTH 240 |
15 |
|
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#define ELLIPSIS "\xe2\x80\xa6" |
17 |
|
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static guint32 a85_val; |
19 |
static guint a85_cnt; |
20 |
static guchar a85_buf[LINELENGTH], *a85_ptr; |
21 |
|
22 |
static void |
23 |
a85_init (void) |
24 |
{ |
25 |
a85_cnt = 4; |
26 |
a85_ptr = a85_buf; |
27 |
} |
28 |
|
29 |
static void |
30 |
a85_push (PerlIO *fp, guchar c) |
31 |
{ |
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a85_val = a85_val << 8 | c; |
33 |
|
34 |
if (!--a85_cnt) |
35 |
{ |
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a85_cnt = 4; |
37 |
if (a85_val) |
38 |
{ |
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a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[0] = (a85_val ) + 33; |
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|
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a85_ptr += 5; |
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} |
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else |
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*a85_ptr++ = 'z'; |
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|
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if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
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{ |
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*a85_ptr++ = '\n'; |
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PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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a85_ptr = a85_buf; |
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} |
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} |
57 |
|
58 |
} |
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|
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static void |
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a85_finish (PerlIO *fp) |
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{ |
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while (a85_cnt != 4) |
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a85_push (fp, 0); |
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|
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*a85_ptr++ = '~'; // probably buggy end-marker |
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*a85_ptr++ = '>'; // probably buggy end-marker |
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*a85_ptr++ = '\n'; |
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|
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PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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} |
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|
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static void |
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rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, |
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unsigned int *h, unsigned int *s, unsigned int *v) |
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{ |
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unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b; |
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unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b; |
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unsigned int delta = mx - mn; |
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|
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*v = mx; |
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|
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*s = mx ? delta * 255 / mx : 0; |
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|
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if (delta == 0) |
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*h = 0; |
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else |
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{ |
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if (r == mx) |
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*h = ((int)g - (int)b) * 255 / (int)(delta * 3); |
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else if (g == mx) |
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*h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52; |
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else if (b == mx) |
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*h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103; |
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|
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*h &= 255; |
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} |
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} |
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|
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///////////////////////////////////////////////////////////////////////////// |
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|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
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|
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PROTOTYPES: ENABLE |
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|
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GdkPixbuf_noinc * |
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transpose (GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int bpp = gdk_pixbuf_get_n_channels (pb); |
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int x, y, i; |
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guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
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int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
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|
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); |
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|
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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|
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for (y = 0; y < h; y++) |
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for (x = 0; x < w; x++) |
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for (i = 0; i < bpp; i++) |
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dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; |
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} |
127 |
OUTPUT: |
128 |
RETVAL |
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|
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GdkPixbuf_noinc * |
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flop (GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int bpp = gdk_pixbuf_get_n_channels (pb); |
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int x, y, i; |
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guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
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int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
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|
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); |
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|
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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|
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for (y = 0; y < h; y++) |
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for (x = 0; x < w; x++) |
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for (i = 0; i < bpp; i++) |
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dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
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} |
151 |
OUTPUT: |
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RETVAL |
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|
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############################################################################# |
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|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
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|
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GdkPixbuf_noinc * |
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p7_to_pb (int w, int h, guchar *src) |
160 |
CODE: |
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{ |
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int x, y; |
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guchar *dst, *d; |
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int dstr; |
165 |
|
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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|
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for (y = 0; y < h; y++) |
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for (d = dst + y * dstr, x = 0; x < w; x++) |
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{ |
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*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
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*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
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*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
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|
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src++; |
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} |
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} |
180 |
OUTPUT: |
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RETVAL |
182 |
|
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SV * |
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pb_to_p7 (GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int x, y; |
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guchar *dst; |
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int bpp = gdk_pixbuf_get_n_channels (pb); |
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guchar *src = gdk_pixbuf_get_pixels (pb); |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
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int Er[IW], Eg[IW], Eb[IW]; |
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int seed = 77; |
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|
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RETVAL = newSV (w * h); |
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SvPOK_only (RETVAL); |
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SvCUR_set (RETVAL, w * h); |
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|
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dst = SvPVX (RETVAL); |
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|
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memset (Er, 0, sizeof (int) * IW); |
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memset (Eg, 0, sizeof (int) * IW); |
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memset (Eb, 0, sizeof (int) * IW); |
206 |
|
207 |
/* some primitive error distribution + random dithering */ |
208 |
|
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for (y = 0; y < h; y++) |
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{ |
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int er = 0, eg = 0, eb = 0; |
212 |
|
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for (x = 0; x < w; x++) |
214 |
{ |
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int r, g, b; |
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guchar *p = src + x * bpp + y * sstr; |
217 |
|
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r = ((p[0] + er + Er[x]) * 7 + 128) / 255; |
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g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255; |
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b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255; |
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|
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r = r > 7 ? 7 : r < 0 ? 0 : r; |
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g = g > 7 ? 7 : g < 0 ? 0 : g; |
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b = b > 3 ? 3 : b < 0 ? 0 : b; |
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|
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er += p[0] - (r * 255 + 4) / 7; |
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eg += p[1] - (g * 255 + 4) / 7; |
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eb += p[2] - (b * 255 + 2) / 3; |
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|
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Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; |
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Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; |
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Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; |
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|
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*dst++ = r << 5 | g << 2 | b; |
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} |
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} |
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} |
238 |
OUTPUT: |
239 |
RETVAL |
240 |
|
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SV * |
242 |
make_histogram (SV *ar) |
243 |
CODE: |
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{ |
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int i; |
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AV *av, *result; |
247 |
|
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if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
249 |
croak ("Not an array ref as first argument to make_histogram"); |
250 |
|
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av = (AV *) SvRV (ar); |
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result = newAV (); |
253 |
|
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for (i = 0; i <= av_len (av); ++i) |
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{ |
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int bigst = 1; |
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int j = 0; |
258 |
SV *sv = *av_fetch (av, i, 1); |
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STRLEN len; |
260 |
char *buf = SvPVbyte (sv, len); |
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int tmphist[256]; |
262 |
char *hist; |
263 |
|
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SV *histsv = newSV (257);//("", 0); |
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sv_upgrade (histsv, SVt_PV); |
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SvCUR_set (histsv, 256); |
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hist = SvPV_nolen (histsv); |
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|
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Zero (tmphist, 256, int); |
270 |
|
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while (len--) |
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++tmphist[*buf++]; |
273 |
|
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for (j = 0; j < 256; ++j) |
275 |
if (tmphist[j] > bigst) |
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bigst = tmphist[j]; |
277 |
|
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for (j = 0; j < 256; ++j) |
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hist[j] = tmphist[j] * 255 / bigst; |
280 |
|
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av_push (result, histsv); |
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} |
283 |
|
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RETVAL = newRV_noinc ((SV *)result); |
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} |
286 |
OUTPUT: |
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RETVAL |
288 |
|
289 |
|
290 |
|
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############################################################################# |
292 |
|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
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|
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void |
296 |
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
297 |
CODE: |
298 |
{ |
299 |
int w = gdk_pixbuf_get_width (pb); |
300 |
int h = gdk_pixbuf_get_height (pb); |
301 |
int x, y, i; |
302 |
guchar *dst; |
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int bpp = gdk_pixbuf_get_n_channels (pb); |
304 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
305 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
306 |
|
307 |
a85_init (); |
308 |
|
309 |
for (y = 0; y < h; y++) |
310 |
for (x = 0; x < w; x++) |
311 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
312 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
313 |
|
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a85_finish (fp); |
315 |
} |
316 |
|
317 |
void |
318 |
dump_binary (PerlIO *fp, GdkPixbuf *pb) |
319 |
CODE: |
320 |
{ |
321 |
int w = gdk_pixbuf_get_width (pb); |
322 |
int h = gdk_pixbuf_get_height (pb); |
323 |
int x, y, i; |
324 |
guchar *dst; |
325 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
326 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
327 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
328 |
|
329 |
for (y = 0; y < h; y++) |
330 |
for (x = 0; x < w; x++) |
331 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
332 |
PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
333 |
} |
334 |
|
335 |
############################################################################# |
336 |
|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
338 |
|
339 |
SV * |
340 |
pb_to_hv84 (GdkPixbuf *pb) |
341 |
CODE: |
342 |
{ |
343 |
int w = gdk_pixbuf_get_width (pb); |
344 |
int h = gdk_pixbuf_get_height (pb); |
345 |
int x, y; |
346 |
guchar *dst; |
347 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
348 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
349 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
350 |
|
351 |
RETVAL = newSV (6 * 8 * 12 / 8); |
352 |
SvPOK_only (RETVAL); |
353 |
SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
354 |
|
355 |
dst = SvPVX (RETVAL); |
356 |
|
357 |
/* some primitive error distribution + random dithering */ |
358 |
|
359 |
for (y = 0; y < h; y++) |
360 |
{ |
361 |
guchar *p = src + y * sstr; |
362 |
|
363 |
for (x = 0; x < w; x += 2) |
364 |
{ |
365 |
unsigned int r, g, b, h, s, v, H, V1, V2; |
366 |
|
367 |
if (bpp == 3) |
368 |
r = *p++, g = *p++, b = *p++; |
369 |
else if (bpp == 1) |
370 |
r = g = b = *p++; |
371 |
else |
372 |
abort (); |
373 |
|
374 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
375 |
|
376 |
H = (h * 15 / 255) << 4; |
377 |
V1 = v; |
378 |
|
379 |
if (bpp == 3) |
380 |
r = *p++, g = *p++, b = *p++; |
381 |
else if (bpp == 1) |
382 |
r = g = b = *p++; |
383 |
else |
384 |
abort (); |
385 |
|
386 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
387 |
|
388 |
H |= h * 15 / 255; |
389 |
V2 = v; |
390 |
|
391 |
*dst++ = H; |
392 |
*dst++ = V1; |
393 |
*dst++ = V2; |
394 |
} |
395 |
} |
396 |
} |
397 |
OUTPUT: |
398 |
RETVAL |
399 |
|
400 |
SV * |
401 |
hv84_to_av (unsigned char *hv84) |
402 |
CODE: |
403 |
{ |
404 |
int i = 72 / 3; |
405 |
AV *av = newAV (); |
406 |
|
407 |
RETVAL = (SV *)newRV_noinc ((SV *)av); |
408 |
while (i--) |
409 |
{ |
410 |
int h = *hv84++; |
411 |
int v1 = *hv84++; |
412 |
int v2 = *hv84++; |
413 |
|
414 |
av_push (av, newSViv (v1)); |
415 |
av_push (av, newSViv ((h >> 4) * 255 / 15)); |
416 |
av_push (av, newSViv (v2)); |
417 |
av_push (av, newSViv ((h & 15) * 255 / 15)); |
418 |
} |
419 |
} |
420 |
OUTPUT: |
421 |
RETVAL |
422 |
|
423 |
|
424 |
|