… | |
… | |
3 | #include "XSUB.h" |
3 | #include "XSUB.h" |
4 | |
4 | |
5 | #include <string.h> |
5 | #include <string.h> |
6 | #include <setjmp.h> |
6 | #include <setjmp.h> |
7 | |
7 | |
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8 | #include <magic.h> |
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9 | |
8 | #include <jpeglib.h> |
10 | #include <jpeglib.h> |
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11 | #include <glib.h> |
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12 | #include <gtk/gtk.h> |
9 | #include <gdk-pixbuf/gdk-pixbuf.h> |
13 | #include <gdk-pixbuf/gdk-pixbuf.h> |
10 | |
14 | |
11 | #include <gperl.h> |
15 | #include <gperl.h> |
12 | #include <gtk2perl.h> |
16 | #include <gtk2perl.h> |
13 | |
17 | |
… | |
… | |
124 | |
128 | |
125 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
129 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
126 | |
130 | |
127 | PROTOTYPES: ENABLE |
131 | PROTOTYPES: ENABLE |
128 | |
132 | |
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133 | # missing function in perl. really :) |
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134 | int |
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135 | common_prefix_length (a, b) |
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136 | unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); |
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137 | unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); |
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138 | CODE: |
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139 | RETVAL = 0; |
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140 | |
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141 | while (*a == *b && *a) |
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142 | { |
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143 | RETVAL += (*a & 0xc0) != 0x80; |
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144 | a++, b++; |
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145 | } |
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146 | |
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147 | OUTPUT: |
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148 | RETVAL |
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149 | |
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150 | const char * |
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151 | magic (const char *path) |
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152 | CODE: |
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153 | { |
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154 | static magic_t cookie; |
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155 | |
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156 | if (!cookie) |
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157 | { |
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158 | cookie = magic_open (MAGIC_NONE); |
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159 | |
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160 | if (cookie) |
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161 | magic_load (cookie, 0); |
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162 | else |
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163 | XSRETURN_UNDEF; |
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164 | } |
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165 | |
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166 | RETVAL = magic_file (cookie, path); |
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167 | } |
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168 | OUTPUT: |
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169 | RETVAL |
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170 | |
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171 | const char * |
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172 | magic_mime (const char *path) |
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173 | CODE: |
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174 | { |
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175 | static magic_t cookie; |
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176 | |
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177 | if (!cookie) |
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178 | { |
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179 | cookie = magic_open (MAGIC_MIME); |
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180 | |
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181 | if (cookie) |
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182 | magic_load (cookie, 0); |
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183 | else |
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184 | XSRETURN_UNDEF; |
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185 | } |
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186 | |
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187 | RETVAL = magic_file (cookie, path); |
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188 | } |
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189 | OUTPUT: |
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190 | RETVAL |
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191 | |
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192 | # missing in Gtk2 perl module |
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193 | |
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194 | gboolean |
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195 | gdk_net_wm_supports (GdkAtom property) |
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196 | CODE: |
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197 | #if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) |
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198 | RETVAL = gdk_net_wm_supports (property); |
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199 | #else |
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200 | RETVAL = 0; |
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201 | #endif |
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202 | OUTPUT: |
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203 | RETVAL |
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204 | |
129 | GdkPixbuf_noinc * |
205 | GdkPixbuf_noinc * |
130 | transpose (GdkPixbuf *pb) |
206 | dealpha_expose (GdkPixbuf *pb) |
131 | CODE: |
207 | CODE: |
132 | { |
208 | { |
133 | int w = gdk_pixbuf_get_width (pb); |
209 | int w = gdk_pixbuf_get_width (pb); |
134 | int h = gdk_pixbuf_get_height (pb); |
210 | int h = gdk_pixbuf_get_height (pb); |
135 | int bpp = gdk_pixbuf_get_n_channels (pb); |
211 | int bpp = gdk_pixbuf_get_n_channels (pb); |
136 | int x, y, i; |
212 | int x, y, i; |
137 | guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
213 | guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
138 | int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
214 | int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
139 | |
215 | |
140 | RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); |
216 | RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
141 | |
217 | |
142 | dst = gdk_pixbuf_get_pixels (RETVAL); |
218 | dst = gdk_pixbuf_get_pixels (RETVAL); |
143 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
219 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
144 | |
220 | |
145 | for (y = 0; y < h; y++) |
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146 | for (x = 0; x < w; x++) |
221 | for (x = 0; x < w; x++) |
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222 | for (y = 0; y < h; y++) |
147 | for (i = 0; i < bpp; i++) |
223 | for (i = 0; i < 3; i++) |
148 | dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; |
224 | dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; |
149 | } |
225 | } |
150 | OUTPUT: |
226 | OUTPUT: |
151 | RETVAL |
227 | RETVAL |
152 | |
228 | |
153 | GdkPixbuf_noinc * |
229 | GdkPixbuf_noinc * |
154 | flop (GdkPixbuf *pb) |
230 | rotate (GdkPixbuf *pb, int angle) |
155 | CODE: |
231 | CODE: |
156 | { |
232 | RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE |
157 | int w = gdk_pixbuf_get_width (pb); |
233 | : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE |
158 | int h = gdk_pixbuf_get_height (pb); |
234 | : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN |
159 | int bpp = gdk_pixbuf_get_n_channels (pb); |
235 | : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE |
160 | int x, y, i; |
236 | : angle); |
161 | guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
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162 | int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
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163 | |
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164 | RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); |
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165 | |
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166 | dst = gdk_pixbuf_get_pixels (RETVAL); |
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167 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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168 | |
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169 | for (y = 0; y < h; y++) |
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170 | for (x = 0; x < w; x++) |
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171 | for (i = 0; i < bpp; i++) |
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172 | dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
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173 | } |
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174 | OUTPUT: |
237 | OUTPUT: |
175 | RETVAL |
238 | RETVAL |
176 | |
239 | |
177 | GdkPixbuf_noinc * |
240 | GdkPixbuf_noinc * |
178 | load_jpeg (char *path, int thumbnail=0) |
241 | load_jpeg (SV *path, int thumbnail=0) |
179 | CODE: |
242 | CODE: |
180 | { |
243 | { |
181 | struct jpeg_decompress_struct cinfo; |
244 | struct jpeg_decompress_struct cinfo; |
182 | struct jpg_err_mgr jerr; |
245 | struct jpg_err_mgr jerr; |
183 | guchar *data; |
246 | guchar *data; |
184 | int rs; |
247 | int rs; |
185 | FILE *fp; |
248 | FILE *fp; |
186 | volatile GdkPixbuf *pb = 0; |
249 | volatile GdkPixbuf *pb = 0; |
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250 | |
187 | RETVAL = 0; |
251 | RETVAL = 0; |
188 | |
252 | |
189 | if (!(fp = fopen (path, "rb"))) |
253 | fp = fopen (SvPVbyte_nolen (path), "rb"); |
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254 | |
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255 | if (!fp) |
190 | XSRETURN_UNDEF; |
256 | XSRETURN_UNDEF; |
191 | |
257 | |
192 | cinfo.err = jpeg_std_error (&jerr.err); |
258 | cinfo.err = jpeg_std_error (&jerr.err); |
193 | |
259 | |
194 | jerr.err.error_exit = cv_error_exit; |
260 | jerr.err.error_exit = cv_error_exit; |
… | |
… | |
225 | { |
291 | { |
226 | cinfo.dct_method = JDCT_FASTEST; |
292 | cinfo.dct_method = JDCT_FASTEST; |
227 | cinfo.do_fancy_upsampling = FALSE; |
293 | cinfo.do_fancy_upsampling = FALSE; |
228 | |
294 | |
229 | while (cinfo.scale_denom < 8 |
295 | while (cinfo.scale_denom < 8 |
230 | && (cinfo.output_width >> 1) >= IW |
296 | && cinfo.output_width >= IW*4 |
231 | && (cinfo.output_height >> 1) >= IH) |
297 | && cinfo.output_height >= IH*4) |
232 | { |
298 | { |
233 | cinfo.scale_denom <<= 1; |
299 | cinfo.scale_denom <<= 1; |
234 | jpeg_calc_output_dimensions (&cinfo); |
300 | jpeg_calc_output_dimensions (&cinfo); |
235 | } |
301 | } |
236 | } |
302 | } |
… | |
… | |
275 | foldcase (SV *pathsv) |
341 | foldcase (SV *pathsv) |
276 | PROTOTYPE: $ |
342 | PROTOTYPE: $ |
277 | CODE: |
343 | CODE: |
278 | { |
344 | { |
279 | STRLEN plen; |
345 | STRLEN plen; |
280 | U8 *path = SvPVutf8 (pathsv, plen); |
346 | U8 *path = (U8 *)SvPVutf8 (pathsv, plen); |
281 | U8 *pend = path + plen; |
347 | U8 *pend = path + plen; |
282 | U8 dst [plen * 6 * 3], *dstp = dst; |
348 | U8 dst [plen * 6 * 3], *dstp = dst; |
283 | |
349 | |
284 | while (path < pend) |
350 | while (path < pend) |
285 | { |
351 | { |
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352 | U8 ch = *path; |
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353 | |
286 | if (*path >= '0' && *path <= '9') |
354 | if (ch >= 'a' && ch <= 'z') |
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355 | *dstp++ = *path++; |
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356 | else if (ch >= '0' && ch <= '9') |
287 | { |
357 | { |
288 | STRLEN el, nl = 0; |
358 | STRLEN el, nl = 0; |
289 | while (*path >= '0' && *path <= '9') |
359 | while (*path >= '0' && *path <= '9' && path < pend) |
290 | path++, nl++; |
360 | path++, nl++; |
291 | |
361 | |
292 | for (el = nl; el < 6; el++) |
362 | for (el = nl; el < 6; el++) |
293 | *dstp++ = '0'; |
363 | *dstp++ = '0'; |
294 | |
364 | |
… | |
… | |
302 | dstp += cl; |
372 | dstp += cl; |
303 | path += is_utf8_char (path); |
373 | path += is_utf8_char (path); |
304 | } |
374 | } |
305 | } |
375 | } |
306 | |
376 | |
307 | RETVAL = newSVpvn (dst, dstp - dst); |
377 | RETVAL = newSVpvn ((const char *)dst, dstp - dst); |
308 | } |
378 | } |
309 | OUTPUT: |
379 | OUTPUT: |
310 | RETVAL |
380 | RETVAL |
311 | |
381 | |
312 | GdkPixbuf_noinc * |
382 | GdkPixbuf_noinc * |
313 | p7_to_pb (int w, int h, guchar *src) |
383 | p7_to_pb (int w, int h, SV *src_sv) |
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384 | PROTOTYPE: @ |
314 | CODE: |
385 | CODE: |
315 | { |
386 | { |
316 | int x, y; |
387 | int x, y; |
317 | guchar *dst, *d; |
388 | guchar *dst, *d; |
318 | int dstr; |
389 | int dstr; |
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390 | guchar *src = (guchar *)SvPVbyte_nolen (src_sv); |
319 | |
391 | |
320 | RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
392 | RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
321 | dst = gdk_pixbuf_get_pixels (RETVAL); |
393 | dst = gdk_pixbuf_get_pixels (RETVAL); |
322 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
394 | dstr = gdk_pixbuf_get_rowstride (RETVAL); |
323 | |
395 | |
… | |
… | |
332 | } |
404 | } |
333 | } |
405 | } |
334 | OUTPUT: |
406 | OUTPUT: |
335 | RETVAL |
407 | RETVAL |
336 | |
408 | |
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409 | ############################################################################# |
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410 | |
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411 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
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412 | |
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413 | void |
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414 | dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
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415 | CODE: |
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416 | { |
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417 | int w = gdk_pixbuf_get_width (pb); |
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418 | int h = gdk_pixbuf_get_height (pb); |
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419 | int x, y, i; |
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420 | guchar *dst; |
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421 | int bpp = gdk_pixbuf_get_n_channels (pb); |
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422 | guchar *src = gdk_pixbuf_get_pixels (pb); |
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423 | int sstr = gdk_pixbuf_get_rowstride (pb); |
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424 | |
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425 | a85_init (); |
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426 | |
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427 | for (y = 0; y < h; y++) |
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428 | for (x = 0; x < w; x++) |
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429 | for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
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430 | a85_push (fp, src [x * bpp + y * sstr + i]); |
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431 | |
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432 | a85_finish (fp); |
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433 | } |
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434 | |
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435 | void |
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436 | dump_binary (PerlIO *fp, GdkPixbuf *pb) |
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437 | CODE: |
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438 | { |
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439 | int w = gdk_pixbuf_get_width (pb); |
|
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440 | int h = gdk_pixbuf_get_height (pb); |
|
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441 | int x, y, i; |
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442 | guchar *dst; |
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443 | int bpp = gdk_pixbuf_get_n_channels (pb); |
|
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444 | guchar *src = gdk_pixbuf_get_pixels (pb); |
|
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445 | int sstr = gdk_pixbuf_get_rowstride (pb); |
|
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446 | |
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447 | for (y = 0; y < h; y++) |
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448 | for (x = 0; x < w; x++) |
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449 | for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
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450 | PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
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451 | } |
|
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452 | |
|
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453 | ############################################################################# |
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454 | |
|
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455 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
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456 | |
337 | SV * |
457 | SV * |
338 | pb_to_p7 (GdkPixbuf *pb) |
458 | pb_to_hv84 (GdkPixbuf *pb) |
339 | CODE: |
459 | CODE: |
340 | { |
460 | { |
341 | int w = gdk_pixbuf_get_width (pb); |
461 | int w = gdk_pixbuf_get_width (pb); |
342 | int h = gdk_pixbuf_get_height (pb); |
462 | int h = gdk_pixbuf_get_height (pb); |
343 | int x, y; |
463 | int x, y; |
344 | guchar *dst; |
464 | guchar *dst; |
345 | int bpp = gdk_pixbuf_get_n_channels (pb); |
465 | int bpp = gdk_pixbuf_get_n_channels (pb); |
346 | guchar *src = gdk_pixbuf_get_pixels (pb); |
466 | guchar *src = gdk_pixbuf_get_pixels (pb); |
347 | int sstr = gdk_pixbuf_get_rowstride (pb); |
467 | int sstr = gdk_pixbuf_get_rowstride (pb); |
348 | int Er[IW], Eg[IW], Eb[IW]; |
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349 | int seed = 77; |
|
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350 | |
468 | |
351 | RETVAL = newSV (w * h); |
469 | RETVAL = newSV (6 * 8 * 12 / 8); |
352 | SvPOK_only (RETVAL); |
470 | SvPOK_only (RETVAL); |
353 | SvCUR_set (RETVAL, w * h); |
471 | SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
354 | |
472 | |
355 | dst = SvPVX (RETVAL); |
473 | dst = (guchar *)SvPVX (RETVAL); |
356 | |
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357 | memset (Er, 0, sizeof (int) * IW); |
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358 | memset (Eg, 0, sizeof (int) * IW); |
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359 | memset (Eb, 0, sizeof (int) * IW); |
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360 | |
474 | |
361 | /* some primitive error distribution + random dithering */ |
475 | /* some primitive error distribution + random dithering */ |
362 | |
476 | |
363 | for (y = 0; y < h; y++) |
477 | for (y = 0; y < h; y++) |
364 | { |
478 | { |
365 | int er = 0, eg = 0, eb = 0; |
479 | guchar *p = src + y * sstr; |
366 | |
480 | |
367 | for (x = 0; x < w; x++) |
481 | for (x = 0; x < w; x += 2) |
368 | { |
482 | { |
369 | int r, g, b; |
483 | unsigned int r, g, b, h, s, v, H, V1, V2; |
370 | guchar *p = src + x * bpp + y * sstr; |
|
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371 | |
484 | |
372 | r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255; |
485 | if (bpp == 3) |
373 | g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255; |
486 | r = *p++, g = *p++, b = *p++; |
374 | b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255; |
487 | else if (bpp == 1) |
|
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488 | r = g = b = *p++; |
|
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489 | else |
|
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490 | abort (); |
375 | |
491 | |
376 | r = r > 7 ? 7 : r < 0 ? 0 : r; |
492 | rgb_to_hsv (r, g, b, &h, &s, &v); |
377 | g = g > 7 ? 7 : g < 0 ? 0 : g; |
|
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378 | b = b > 3 ? 3 : b < 0 ? 0 : b; |
|
|
379 | |
493 | |
380 | er += p[0] - (r * 255 + 4) / 7; |
494 | H = (h * 15 / 255) << 4; |
381 | eg += p[1] - (g * 255 + 4) / 7; |
495 | V1 = v; |
382 | eb += p[2] - (b * 255 + 2) / 3; |
|
|
383 | |
496 | |
384 | Er[x] = er >> 1; er -= (er + 1) >> 1; |
497 | if (bpp == 3) |
385 | Eg[x] = eg >> 1; eg -= (eg + 1) >> 1; |
498 | r = *p++, g = *p++, b = *p++; |
386 | Eb[x] = eb >> 1; eb -= (eb + 1) >> 1; |
499 | else if (bpp == 1) |
|
|
500 | r = g = b = *p++; |
|
|
501 | else |
|
|
502 | abort (); |
387 | |
503 | |
388 | *dst++ = r << 5 | g << 2 | b; |
504 | rgb_to_hsv (r, g, b, &h, &s, &v); |
|
|
505 | |
|
|
506 | H |= h * 15 / 255; |
|
|
507 | V2 = v; |
|
|
508 | |
|
|
509 | *dst++ = H; |
|
|
510 | *dst++ = V1; |
|
|
511 | *dst++ = V2; |
389 | } |
512 | } |
390 | } |
513 | } |
391 | } |
514 | } |
392 | OUTPUT: |
515 | OUTPUT: |
393 | RETVAL |
516 | RETVAL |
394 | |
517 | |
395 | SV * |
518 | SV * |
|
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519 | hv84_to_av (unsigned char *hv84) |
|
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520 | CODE: |
|
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521 | { |
|
|
522 | int i = 72 / 3; |
|
|
523 | AV *av = newAV (); |
|
|
524 | |
|
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525 | RETVAL = (SV *)newRV_noinc ((SV *)av); |
|
|
526 | while (i--) |
|
|
527 | { |
|
|
528 | int h = *hv84++; |
|
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529 | int v1 = *hv84++; |
|
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530 | int v2 = *hv84++; |
|
|
531 | |
|
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532 | av_push (av, newSViv (v1)); |
|
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533 | av_push (av, newSViv ((h >> 4) * 255 / 15)); |
|
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534 | av_push (av, newSViv (v2)); |
|
|
535 | av_push (av, newSViv ((h & 15) * 255 / 15)); |
|
|
536 | } |
|
|
537 | } |
|
|
538 | OUTPUT: |
|
|
539 | RETVAL |
|
|
540 | |
|
|
541 | ############################################################################# |
|
|
542 | |
|
|
543 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster |
|
|
544 | |
|
|
545 | SV * |
396 | make_histogram (SV *ar) |
546 | make_histograms (SV *ar) |
397 | CODE: |
547 | CODE: |
398 | { |
548 | { |
399 | int i; |
549 | int i; |
400 | AV *av, *result; |
550 | AV *av, *result; |
401 | |
551 | |
… | |
… | |
444 | RETVAL = newRV_noinc ((SV *)result); |
594 | RETVAL = newRV_noinc ((SV *)result); |
445 | } |
595 | } |
446 | OUTPUT: |
596 | OUTPUT: |
447 | RETVAL |
597 | RETVAL |
448 | |
598 | |
449 | ############################################################################# |
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|
450 | |
599 | |
451 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
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452 | |
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453 | void |
|
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454 | dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
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455 | CODE: |
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|
456 | { |
|
|
457 | int w = gdk_pixbuf_get_width (pb); |
|
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458 | int h = gdk_pixbuf_get_height (pb); |
|
|
459 | int x, y, i; |
|
|
460 | guchar *dst; |
|
|
461 | int bpp = gdk_pixbuf_get_n_channels (pb); |
|
|
462 | guchar *src = gdk_pixbuf_get_pixels (pb); |
|
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463 | int sstr = gdk_pixbuf_get_rowstride (pb); |
|
|
464 | |
|
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465 | a85_init (); |
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466 | |
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|
467 | for (y = 0; y < h; y++) |
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468 | for (x = 0; x < w; x++) |
|
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469 | for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
|
|
470 | a85_push (fp, src [x * bpp + y * sstr + i]); |
|
|
471 | |
|
|
472 | a85_finish (fp); |
|
|
473 | } |
|
|
474 | |
|
|
475 | void |
|
|
476 | dump_binary (PerlIO *fp, GdkPixbuf *pb) |
|
|
477 | CODE: |
|
|
478 | { |
|
|
479 | int w = gdk_pixbuf_get_width (pb); |
|
|
480 | int h = gdk_pixbuf_get_height (pb); |
|
|
481 | int x, y, i; |
|
|
482 | guchar *dst; |
|
|
483 | int bpp = gdk_pixbuf_get_n_channels (pb); |
|
|
484 | guchar *src = gdk_pixbuf_get_pixels (pb); |
|
|
485 | int sstr = gdk_pixbuf_get_rowstride (pb); |
|
|
486 | |
|
|
487 | for (y = 0; y < h; y++) |
|
|
488 | for (x = 0; x < w; x++) |
|
|
489 | for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
|
|
490 | PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
|
|
491 | } |
|
|
492 | |
|
|
493 | ############################################################################# |
|
|
494 | |
|
|
495 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
|
|
496 | |
|
|
497 | SV * |
|
|
498 | pb_to_hv84 (GdkPixbuf *pb) |
|
|
499 | CODE: |
|
|
500 | { |
|
|
501 | int w = gdk_pixbuf_get_width (pb); |
|
|
502 | int h = gdk_pixbuf_get_height (pb); |
|
|
503 | int x, y; |
|
|
504 | guchar *dst; |
|
|
505 | int bpp = gdk_pixbuf_get_n_channels (pb); |
|
|
506 | guchar *src = gdk_pixbuf_get_pixels (pb); |
|
|
507 | int sstr = gdk_pixbuf_get_rowstride (pb); |
|
|
508 | |
|
|
509 | RETVAL = newSV (6 * 8 * 12 / 8); |
|
|
510 | SvPOK_only (RETVAL); |
|
|
511 | SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
|
|
512 | |
|
|
513 | dst = SvPVX (RETVAL); |
|
|
514 | |
|
|
515 | /* some primitive error distribution + random dithering */ |
|
|
516 | |
|
|
517 | for (y = 0; y < h; y++) |
|
|
518 | { |
|
|
519 | guchar *p = src + y * sstr; |
|
|
520 | |
|
|
521 | for (x = 0; x < w; x += 2) |
|
|
522 | { |
|
|
523 | unsigned int r, g, b, h, s, v, H, V1, V2; |
|
|
524 | |
|
|
525 | if (bpp == 3) |
|
|
526 | r = *p++, g = *p++, b = *p++; |
|
|
527 | else if (bpp == 1) |
|
|
528 | r = g = b = *p++; |
|
|
529 | else |
|
|
530 | abort (); |
|
|
531 | |
|
|
532 | rgb_to_hsv (r, g, b, &h, &s, &v); |
|
|
533 | |
|
|
534 | H = (h * 15 / 255) << 4; |
|
|
535 | V1 = v; |
|
|
536 | |
|
|
537 | if (bpp == 3) |
|
|
538 | r = *p++, g = *p++, b = *p++; |
|
|
539 | else if (bpp == 1) |
|
|
540 | r = g = b = *p++; |
|
|
541 | else |
|
|
542 | abort (); |
|
|
543 | |
|
|
544 | rgb_to_hsv (r, g, b, &h, &s, &v); |
|
|
545 | |
|
|
546 | H |= h * 15 / 255; |
|
|
547 | V2 = v; |
|
|
548 | |
|
|
549 | *dst++ = H; |
|
|
550 | *dst++ = V1; |
|
|
551 | *dst++ = V2; |
|
|
552 | } |
|
|
553 | } |
|
|
554 | } |
|
|
555 | OUTPUT: |
|
|
556 | RETVAL |
|
|
557 | |
|
|
558 | SV * |
|
|
559 | hv84_to_av (unsigned char *hv84) |
|
|
560 | CODE: |
|
|
561 | { |
|
|
562 | int i = 72 / 3; |
|
|
563 | AV *av = newAV (); |
|
|
564 | |
|
|
565 | RETVAL = (SV *)newRV_noinc ((SV *)av); |
|
|
566 | while (i--) |
|
|
567 | { |
|
|
568 | int h = *hv84++; |
|
|
569 | int v1 = *hv84++; |
|
|
570 | int v2 = *hv84++; |
|
|
571 | |
|
|
572 | av_push (av, newSViv (v1)); |
|
|
573 | av_push (av, newSViv ((h >> 4) * 255 / 15)); |
|
|
574 | av_push (av, newSViv (v2)); |
|
|
575 | av_push (av, newSViv ((h & 15) * 255 / 15)); |
|
|
576 | } |
|
|
577 | } |
|
|
578 | OUTPUT: |
|
|
579 | RETVAL |
|
|
580 | |
|
|
581 | |
|
|
582 | |
|
|