1 |
root |
1.1 |
#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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root |
1.2 |
#include <gdk-pixbuf/gdk-pixbuf.h> |
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#include <gperl.h> |
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#include <gtk2perl.h> |
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1.5 |
#define IW 80 |
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#define RAND (seed = (seed + 7141) * 54773 % 134456) |
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1.7 |
#define LINELENGTH 240 |
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root |
1.6 |
#define ELLIPSIS "\xe2\x80\xa6" |
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18 |
root |
1.4 |
static guint32 a85_val; |
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static guint a85_cnt; |
20 |
root |
1.7 |
static guchar a85_buf[LINELENGTH], *a85_ptr; |
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root |
1.4 |
|
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static void |
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a85_init (void) |
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{ |
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a85_cnt = 4; |
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a85_ptr = a85_buf; |
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} |
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29 |
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static void |
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a85_push (PerlIO *fp, guchar c) |
31 |
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{ |
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a85_val = a85_val << 8 | c; |
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34 |
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if (!--a85_cnt) |
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{ |
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a85_cnt = 4; |
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if (a85_val) |
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{ |
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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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45 |
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a85_ptr += 5; |
46 |
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} |
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else |
48 |
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*a85_ptr++ = 'z'; |
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if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
51 |
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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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} |
56 |
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} |
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58 |
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} |
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60 |
root |
1.8 |
static void |
61 |
root |
1.4 |
a85_finish (PerlIO *fp) |
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{ |
63 |
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while (a85_cnt != 4) |
64 |
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a85_push (fp, 0); |
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66 |
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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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PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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} |
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root |
1.8 |
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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{ |
77 |
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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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*v = mx; |
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83 |
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*s = mx ? delta * 255 / mx : 0; |
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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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*h &= 255; |
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} |
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} |
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100 |
root |
1.6 |
///////////////////////////////////////////////////////////////////////////// |
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root |
1.9 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
103 |
root |
1.1 |
|
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PROTOTYPES: ENABLE |
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root |
1.2 |
|
106 |
root |
1.3 |
GdkPixbuf_noinc * |
107 |
root |
1.2 |
transpose (GdkPixbuf *pb) |
108 |
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CODE: |
109 |
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{ |
110 |
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int w = gdk_pixbuf_get_width (pb); |
111 |
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int h = gdk_pixbuf_get_height (pb); |
112 |
root |
1.7 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
113 |
root |
1.2 |
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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117 |
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); |
118 |
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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122 |
root |
1.3 |
for (y = 0; y < h; y++) |
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for (x = 0; x < w; x++) |
124 |
root |
1.2 |
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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} |
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OUTPUT: |
128 |
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RETVAL |
129 |
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130 |
root |
1.3 |
GdkPixbuf_noinc * |
131 |
root |
1.2 |
flop (GdkPixbuf *pb) |
132 |
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CODE: |
133 |
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{ |
134 |
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int w = gdk_pixbuf_get_width (pb); |
135 |
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int h = gdk_pixbuf_get_height (pb); |
136 |
root |
1.7 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
137 |
root |
1.2 |
int x, y, i; |
138 |
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guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
139 |
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int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
140 |
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141 |
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); |
142 |
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143 |
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dst = gdk_pixbuf_get_pixels (RETVAL); |
144 |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
145 |
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146 |
root |
1.3 |
for (y = 0; y < h; y++) |
147 |
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for (x = 0; x < w; x++) |
148 |
root |
1.2 |
for (i = 0; i < bpp; i++) |
149 |
root |
1.4 |
dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
150 |
root |
1.2 |
} |
151 |
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OUTPUT: |
152 |
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RETVAL |
153 |
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154 |
root |
1.6 |
############################################################################# |
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156 |
root |
1.2 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
157 |
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158 |
root |
1.3 |
GdkPixbuf_noinc * |
159 |
root |
1.2 |
p7_to_pb (int w, int h, guchar *src) |
160 |
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CODE: |
161 |
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{ |
162 |
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int x, y; |
163 |
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guchar *dst, *d; |
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int dstr; |
165 |
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166 |
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
167 |
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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170 |
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for (y = 0; y < h; y++) |
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for (d = dst + y * dstr, x = 0; x < w; x++) |
172 |
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{ |
173 |
root |
1.3 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
174 |
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*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
175 |
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*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
176 |
root |
1.2 |
|
177 |
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src++; |
178 |
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} |
179 |
root |
1.3 |
} |
180 |
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OUTPUT: |
181 |
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RETVAL |
182 |
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183 |
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SV * |
184 |
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pb_to_p7 (GdkPixbuf *pb) |
185 |
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CODE: |
186 |
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{ |
187 |
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int w = gdk_pixbuf_get_width (pb); |
188 |
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int h = gdk_pixbuf_get_height (pb); |
189 |
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int x, y; |
190 |
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guchar *dst; |
191 |
root |
1.7 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
192 |
root |
1.3 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
193 |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
194 |
root |
1.5 |
int Er[IW], Eg[IW], Eb[IW]; |
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int seed = 77; |
196 |
root |
1.3 |
|
197 |
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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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201 |
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dst = SvPVX (RETVAL); |
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203 |
root |
1.5 |
memset (Er, 0, sizeof (int) * IW); |
204 |
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memset (Eg, 0, sizeof (int) * IW); |
205 |
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memset (Eb, 0, sizeof (int) * IW); |
206 |
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207 |
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/* some primitive error distribution + random dithering */ |
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209 |
root |
1.3 |
for (y = 0; y < h; y++) |
210 |
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{ |
211 |
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int er = 0, eg = 0, eb = 0; |
212 |
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for (x = 0; x < w; x++) |
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{ |
215 |
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int r, g, b; |
216 |
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guchar *p = src + x * bpp + y * sstr; |
217 |
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218 |
root |
1.5 |
r = ((p[0] + er + Er[x]) * 7 + 128) / 255; |
219 |
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g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255; |
220 |
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b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255; |
221 |
root |
1.3 |
|
222 |
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r = r > 7 ? 7 : r < 0 ? 0 : r; |
223 |
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g = g > 7 ? 7 : g < 0 ? 0 : g; |
224 |
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b = b > 3 ? 3 : b < 0 ? 0 : b; |
225 |
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226 |
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er += p[0] - (r * 255 + 4) / 7; |
227 |
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eg += p[1] - (g * 255 + 4) / 7; |
228 |
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eb += p[2] - (b * 255 + 2) / 3; |
229 |
root |
1.5 |
|
230 |
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Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; |
231 |
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Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; |
232 |
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Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; |
233 |
root |
1.3 |
|
234 |
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*dst++ = r << 5 | g << 2 | b; |
235 |
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} |
236 |
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} |
237 |
root |
1.2 |
} |
238 |
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OUTPUT: |
239 |
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RETVAL |
240 |
root |
1.6 |
|
241 |
root |
1.10 |
SV * |
242 |
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make_histogram (SV *ar) |
243 |
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CODE: |
244 |
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{ |
245 |
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int i; |
246 |
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AV *av, *result; |
247 |
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248 |
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if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
249 |
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croak ("Not an array ref as first argument to make_histogram"); |
250 |
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251 |
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av = (AV *) SvRV (ar); |
252 |
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result = newAV (); |
253 |
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254 |
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for (i = 0; i <= av_len (av); ++i) |
255 |
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{ |
256 |
root |
1.11 |
int bigst, j; |
257 |
root |
1.10 |
SV *sv = *av_fetch (av, i, 1); |
258 |
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STRLEN len; |
259 |
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char *buf = SvPVbyte (sv, len); |
260 |
root |
1.11 |
|
261 |
root |
1.10 |
int tmphist[256]; |
262 |
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char *hist; |
263 |
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264 |
root |
1.11 |
SV *histsv = newSV (257); |
265 |
root |
1.10 |
sv_upgrade (histsv, SVt_PV); |
266 |
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SvCUR_set (histsv, 256); |
267 |
root |
1.12 |
hist = SvPVX (histsv); |
268 |
root |
1.10 |
|
269 |
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Zero (tmphist, 256, int); |
270 |
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271 |
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while (len--) |
272 |
root |
1.11 |
++tmphist[(unsigned char)*buf++]; |
273 |
root |
1.10 |
|
274 |
root |
1.11 |
bigst = 1; |
275 |
root |
1.10 |
for (j = 0; j < 256; ++j) |
276 |
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if (tmphist[j] > bigst) |
277 |
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bigst = tmphist[j]; |
278 |
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279 |
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for (j = 0; j < 256; ++j) |
280 |
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hist[j] = tmphist[j] * 255 / bigst; |
281 |
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282 |
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av_push (result, histsv); |
283 |
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} |
284 |
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285 |
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RETVAL = newRV_noinc ((SV *)result); |
286 |
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} |
287 |
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OUTPUT: |
288 |
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RETVAL |
289 |
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290 |
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291 |
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292 |
root |
1.6 |
############################################################################# |
293 |
root |
1.4 |
|
294 |
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
295 |
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296 |
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void |
297 |
root |
1.7 |
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
298 |
root |
1.4 |
CODE: |
299 |
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{ |
300 |
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int w = gdk_pixbuf_get_width (pb); |
301 |
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int h = gdk_pixbuf_get_height (pb); |
302 |
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int x, y, i; |
303 |
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guchar *dst; |
304 |
root |
1.7 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
305 |
root |
1.4 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
306 |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
307 |
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|
308 |
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a85_init (); |
309 |
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310 |
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for (y = 0; y < h; y++) |
311 |
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for (x = 0; x < w; x++) |
312 |
root |
1.7 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
313 |
root |
1.4 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
314 |
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315 |
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a85_finish (fp); |
316 |
root |
1.7 |
} |
317 |
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318 |
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void |
319 |
|
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dump_binary (PerlIO *fp, GdkPixbuf *pb) |
320 |
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CODE: |
321 |
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{ |
322 |
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int w = gdk_pixbuf_get_width (pb); |
323 |
|
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int h = gdk_pixbuf_get_height (pb); |
324 |
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int x, y, i; |
325 |
|
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guchar *dst; |
326 |
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int bpp = gdk_pixbuf_get_n_channels (pb); |
327 |
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guchar *src = gdk_pixbuf_get_pixels (pb); |
328 |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
329 |
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|
330 |
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for (y = 0; y < h; y++) |
331 |
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for (x = 0; x < w; x++) |
332 |
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for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
333 |
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PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
334 |
root |
1.4 |
} |
335 |
root |
1.8 |
|
336 |
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############################################################################# |
337 |
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|
338 |
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
339 |
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|
340 |
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SV * |
341 |
|
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pb_to_hv84 (GdkPixbuf *pb) |
342 |
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CODE: |
343 |
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{ |
344 |
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int w = gdk_pixbuf_get_width (pb); |
345 |
|
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int h = gdk_pixbuf_get_height (pb); |
346 |
|
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int x, y; |
347 |
|
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guchar *dst; |
348 |
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int bpp = gdk_pixbuf_get_n_channels (pb); |
349 |
|
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guchar *src = gdk_pixbuf_get_pixels (pb); |
350 |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
351 |
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|
352 |
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RETVAL = newSV (6 * 8 * 12 / 8); |
353 |
|
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SvPOK_only (RETVAL); |
354 |
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SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
355 |
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|
356 |
|
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dst = SvPVX (RETVAL); |
357 |
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|
358 |
|
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/* some primitive error distribution + random dithering */ |
359 |
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|
360 |
|
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for (y = 0; y < h; y++) |
361 |
|
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{ |
362 |
|
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guchar *p = src + y * sstr; |
363 |
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|
364 |
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for (x = 0; x < w; x += 2) |
365 |
|
|
{ |
366 |
|
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unsigned int r, g, b, h, s, v, H, V1, V2; |
367 |
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|
368 |
|
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if (bpp == 3) |
369 |
|
|
r = *p++, g = *p++, b = *p++; |
370 |
|
|
else if (bpp == 1) |
371 |
|
|
r = g = b = *p++; |
372 |
|
|
else |
373 |
|
|
abort (); |
374 |
|
|
|
375 |
|
|
rgb_to_hsv (r, g, b, &h, &s, &v); |
376 |
|
|
|
377 |
|
|
H = (h * 15 / 255) << 4; |
378 |
|
|
V1 = v; |
379 |
|
|
|
380 |
|
|
if (bpp == 3) |
381 |
|
|
r = *p++, g = *p++, b = *p++; |
382 |
|
|
else if (bpp == 1) |
383 |
|
|
r = g = b = *p++; |
384 |
|
|
else |
385 |
|
|
abort (); |
386 |
|
|
|
387 |
|
|
rgb_to_hsv (r, g, b, &h, &s, &v); |
388 |
|
|
|
389 |
|
|
H |= h * 15 / 255; |
390 |
|
|
V2 = v; |
391 |
|
|
|
392 |
|
|
*dst++ = H; |
393 |
|
|
*dst++ = V1; |
394 |
|
|
*dst++ = V2; |
395 |
|
|
} |
396 |
|
|
} |
397 |
|
|
} |
398 |
|
|
OUTPUT: |
399 |
|
|
RETVAL |
400 |
root |
1.4 |
|
401 |
root |
1.9 |
SV * |
402 |
|
|
hv84_to_av (unsigned char *hv84) |
403 |
|
|
CODE: |
404 |
|
|
{ |
405 |
|
|
int i = 72 / 3; |
406 |
|
|
AV *av = newAV (); |
407 |
|
|
|
408 |
|
|
RETVAL = (SV *)newRV_noinc ((SV *)av); |
409 |
|
|
while (i--) |
410 |
|
|
{ |
411 |
|
|
int h = *hv84++; |
412 |
|
|
int v1 = *hv84++; |
413 |
|
|
int v2 = *hv84++; |
414 |
|
|
|
415 |
|
|
av_push (av, newSViv (v1)); |
416 |
|
|
av_push (av, newSViv ((h >> 4) * 255 / 15)); |
417 |
|
|
av_push (av, newSViv (v2)); |
418 |
|
|
av_push (av, newSViv ((h & 15) * 255 / 15)); |
419 |
|
|
} |
420 |
|
|
} |
421 |
|
|
OUTPUT: |
422 |
|
|
RETVAL |
423 |
root |
1.2 |
|
424 |
root |
1.1 |
|
425 |
|
|
|