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5 | #include <gdk-pixbuf/gdk-pixbuf.h> |
5 | #include <gdk-pixbuf/gdk-pixbuf.h> |
6 | |
6 | |
7 | #include <gperl.h> |
7 | #include <gperl.h> |
8 | #include <gtk2perl.h> |
8 | #include <gtk2perl.h> |
9 | |
9 | |
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10 | #define IW 80 |
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11 | |
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12 | #define RAND (seed = (seed + 7141) * 54773 % 134456) |
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13 | |
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14 | #define ELLIPSIS "\xe2\x80\xa6" |
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15 | |
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16 | static guint32 a85_val; |
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17 | static guint a85_cnt; |
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18 | static guchar a85_buf[80], *a85_ptr; |
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19 | |
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20 | static void |
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21 | a85_init (void) |
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22 | { |
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23 | a85_cnt = 4; |
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24 | a85_ptr = a85_buf; |
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25 | } |
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26 | |
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27 | static void |
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28 | a85_push (PerlIO *fp, guchar c) |
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29 | { |
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30 | a85_val = a85_val << 8 | c; |
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31 | |
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32 | if (!--a85_cnt) |
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33 | { |
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34 | a85_cnt = 4; |
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35 | if (a85_val) |
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36 | { |
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37 | a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
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38 | a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
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39 | a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
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40 | a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
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41 | a85_ptr[0] = (a85_val ) + 33; |
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42 | |
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43 | a85_ptr += 5; |
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44 | } |
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45 | else |
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46 | *a85_ptr++ = 'z'; |
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47 | |
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48 | if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
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49 | { |
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50 | *a85_ptr++ = '\n'; |
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51 | PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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52 | a85_ptr = a85_buf; |
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53 | } |
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54 | } |
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55 | |
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56 | } |
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57 | |
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58 | a85_finish (PerlIO *fp) |
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59 | { |
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60 | while (a85_cnt != 4) |
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61 | a85_push (fp, 0); |
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62 | |
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63 | *a85_ptr++ = '~'; // probably buggy end-marker |
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64 | *a85_ptr++ = '>'; // probably buggy end-marker |
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65 | *a85_ptr++ = '\n'; |
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66 | |
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67 | PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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68 | } |
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69 | |
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70 | ///////////////////////////////////////////////////////////////////////////// |
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71 | |
10 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow |
72 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow |
11 | |
73 | |
12 | PROTOTYPES: ENABLE |
74 | PROTOTYPES: ENABLE |
13 | |
75 | |
14 | GdkPixbuf_noinc * |
76 | GdkPixbuf_noinc * |
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52 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
114 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
53 | |
115 | |
54 | for (y = 0; y < h; y++) |
116 | for (y = 0; y < h; y++) |
55 | for (x = 0; x < w; x++) |
117 | for (x = 0; x < w; x++) |
56 | for (i = 0; i < bpp; i++) |
118 | for (i = 0; i < bpp; i++) |
57 | dst[(w - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
119 | dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
58 | } |
120 | } |
59 | OUTPUT: |
121 | OUTPUT: |
60 | RETVAL |
122 | RETVAL |
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123 | |
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124 | ############################################################################# |
61 | |
125 | |
62 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
126 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
63 | |
127 | |
64 | GdkPixbuf_noinc * |
128 | GdkPixbuf_noinc * |
65 | p7_to_pb (int w, int h, guchar *src) |
129 | p7_to_pb (int w, int h, guchar *src) |
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95 | int x, y; |
159 | int x, y; |
96 | guchar *dst; |
160 | guchar *dst; |
97 | int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
161 | int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
98 | guchar *src = gdk_pixbuf_get_pixels (pb); |
162 | guchar *src = gdk_pixbuf_get_pixels (pb); |
99 | int sstr = gdk_pixbuf_get_rowstride (pb); |
163 | int sstr = gdk_pixbuf_get_rowstride (pb); |
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164 | int Er[IW], Eg[IW], Eb[IW]; |
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165 | int seed = 77; |
100 | |
166 | |
101 | RETVAL = newSV (w * h); |
167 | RETVAL = newSV (w * h); |
102 | SvPOK_only (RETVAL); |
168 | SvPOK_only (RETVAL); |
103 | SvCUR_set (RETVAL, w * h); |
169 | SvCUR_set (RETVAL, w * h); |
104 | |
170 | |
105 | dst = SvPVX (RETVAL); |
171 | dst = SvPVX (RETVAL); |
106 | |
172 | |
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173 | memset (Er, 0, sizeof (int) * IW); |
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174 | memset (Eg, 0, sizeof (int) * IW); |
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175 | memset (Eb, 0, sizeof (int) * IW); |
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176 | |
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177 | /* some primitive error distribution + random dithering */ |
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178 | |
107 | for (y = 0; y < h; y++) |
179 | for (y = 0; y < h; y++) |
108 | { |
180 | { |
109 | /* use a very primitive form of error distribution. */ |
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110 | int er = 0, eg = 0, eb = 0; |
181 | int er = 0, eg = 0, eb = 0; |
111 | |
182 | |
112 | for (x = 0; x < w; x++) |
183 | for (x = 0; x < w; x++) |
113 | { |
184 | { |
114 | int r, g, b; |
185 | int r, g, b; |
115 | guchar *p = src + x * bpp + y * sstr; |
186 | guchar *p = src + x * bpp + y * sstr; |
116 | |
187 | |
117 | r = ((p[0] + er) * 7 + 128) / 255; |
188 | r = ((p[0] + er + Er[x]) * 7 + 128) / 255; |
118 | g = ((p[1] + eg) * 7 + 128) / 255; |
189 | g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255; |
119 | b = ((p[2] + eb) * 3 + 128) / 255; |
190 | b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255; |
120 | |
191 | |
121 | r = r > 7 ? 7 : r < 0 ? 0 : r; |
192 | r = r > 7 ? 7 : r < 0 ? 0 : r; |
122 | g = g > 7 ? 7 : g < 0 ? 0 : g; |
193 | g = g > 7 ? 7 : g < 0 ? 0 : g; |
123 | b = b > 3 ? 3 : b < 0 ? 0 : b; |
194 | b = b > 3 ? 3 : b < 0 ? 0 : b; |
124 | |
195 | |
125 | er += p[0] - (r * 255 + 4) / 7; |
196 | er += p[0] - (r * 255 + 4) / 7; |
126 | eg += p[1] - (g * 255 + 4) / 7; |
197 | eg += p[1] - (g * 255 + 4) / 7; |
127 | eb += p[2] - (b * 255 + 2) / 3; |
198 | eb += p[2] - (b * 255 + 2) / 3; |
128 | |
199 | |
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200 | Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; |
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201 | Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; |
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202 | Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; |
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203 | |
129 | *dst++ = r << 5 | g << 2 | b; |
204 | *dst++ = r << 5 | g << 2 | b; |
130 | } |
205 | } |
131 | } |
206 | } |
132 | } |
207 | } |
133 | OUTPUT: |
208 | OUTPUT: |
134 | RETVAL |
209 | RETVAL |
135 | |
210 | |
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211 | ############################################################################# |
136 | |
212 | |
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213 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
137 | |
214 | |
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215 | void |
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216 | dump_pb (PerlIO *fp, GdkPixbuf *pb) |
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217 | CODE: |
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218 | { |
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219 | int w = gdk_pixbuf_get_width (pb); |
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220 | int h = gdk_pixbuf_get_height (pb); |
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221 | int x, y, i; |
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222 | guchar *dst; |
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223 | int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
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224 | guchar *src = gdk_pixbuf_get_pixels (pb); |
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225 | int sstr = gdk_pixbuf_get_rowstride (pb); |
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226 | |
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227 | a85_init (); |
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228 | |
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229 | for (y = 0; y < h; y++) |
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230 | for (x = 0; x < w; x++) |
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231 | for (i = 0; i < 3; i++) |
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232 | a85_push (fp, src [x * bpp + y * sstr + i]); |
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233 | |
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234 | a85_finish (fp); |
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235 | } |
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236 | |
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237 | |
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238 | |
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239 | |