| … | |
… | |
| 236 | } |
236 | } |
| 237 | } |
237 | } |
| 238 | OUTPUT: |
238 | OUTPUT: |
| 239 | RETVAL |
239 | RETVAL |
| 240 | |
240 | |
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241 | SV * |
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242 | make_histogram (SV *ar) |
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243 | CODE: |
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244 | { |
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245 | int i; |
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246 | AV *av, *result; |
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247 | |
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248 | if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
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249 | croak ("Not an array ref as first argument to make_histogram"); |
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250 | |
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251 | av = (AV *) SvRV (ar); |
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252 | result = newAV (); |
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253 | |
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254 | for (i = 0; i <= av_len (av); ++i) |
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255 | { |
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256 | int bigst, j; |
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257 | SV *sv = *av_fetch (av, i, 1); |
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258 | STRLEN len; |
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259 | char *buf = SvPVbyte (sv, len); |
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260 | |
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261 | int tmphist[256]; |
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262 | char *hist; |
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263 | |
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264 | SV *histsv = newSV (257); |
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265 | sv_upgrade (histsv, SVt_PV); |
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266 | SvCUR_set (histsv, 256); |
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267 | hist = SvPV_nolen (histsv); |
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268 | |
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269 | Zero (tmphist, 256, int); |
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270 | |
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271 | while (len--) |
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272 | ++tmphist[(unsigned char)*buf++]; |
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273 | |
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274 | bigst = 1; |
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275 | for (j = 0; j < 256; ++j) |
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276 | if (tmphist[j] > bigst) |
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277 | bigst = tmphist[j]; |
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278 | |
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279 | for (j = 0; j < 256; ++j) |
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280 | hist[j] = tmphist[j] * 255 / bigst; |
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281 | |
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282 | av_push (result, histsv); |
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283 | } |
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284 | |
|
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285 | RETVAL = newRV_noinc ((SV *)result); |
|
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286 | } |
|
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287 | OUTPUT: |
|
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288 | RETVAL |
|
|
289 | |
|
|
290 | |
|
|
291 | |
| 241 | ############################################################################# |
292 | ############################################################################# |
| 242 | |
293 | |
| 243 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
294 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
| 244 | |
295 | |
| 245 | void |
296 | void |
