1 | /*
|
---|
2 | * fastimg -
|
---|
3 | * Faster reading and writing of image files.
|
---|
4 | *
|
---|
5 | * This code should work on machines with any byte order.
|
---|
6 | *
|
---|
7 | * Could someone make this run real fast using multiple processors
|
---|
8 | * or how about using memory mapped files to speed it up?
|
---|
9 | *
|
---|
10 | * Paul Haeberli - 1991
|
---|
11 | *
|
---|
12 | * Changed to return sizes.
|
---|
13 | * Sjoerd Mullender - 1993
|
---|
14 | * Changed to incorporate into Python.
|
---|
15 | * Sjoerd Mullender - 1993
|
---|
16 | */
|
---|
17 | #include "Python.h"
|
---|
18 |
|
---|
19 | #if SIZEOF_INT == 4
|
---|
20 | typedef int Py_Int32;
|
---|
21 | typedef unsigned int Py_UInt32;
|
---|
22 | #else
|
---|
23 | #if SIZEOF_LONG == 4
|
---|
24 | typedef long Py_Int32;
|
---|
25 | typedef unsigned long Py_UInt32;
|
---|
26 | #else
|
---|
27 | #error "No 4-byte integral type"
|
---|
28 | #endif
|
---|
29 | #endif
|
---|
30 |
|
---|
31 | #include <string.h>
|
---|
32 |
|
---|
33 | /*
|
---|
34 | * from image.h
|
---|
35 | *
|
---|
36 | */
|
---|
37 | typedef struct {
|
---|
38 | unsigned short imagic; /* stuff saved on disk . . */
|
---|
39 | unsigned short type;
|
---|
40 | unsigned short dim;
|
---|
41 | unsigned short xsize;
|
---|
42 | unsigned short ysize;
|
---|
43 | unsigned short zsize;
|
---|
44 | Py_UInt32 min;
|
---|
45 | Py_UInt32 max;
|
---|
46 | Py_UInt32 wastebytes;
|
---|
47 | char name[80];
|
---|
48 | Py_UInt32 colormap;
|
---|
49 |
|
---|
50 | Py_Int32 file; /* stuff used in core only */
|
---|
51 | unsigned short flags;
|
---|
52 | short dorev;
|
---|
53 | short x;
|
---|
54 | short y;
|
---|
55 | short z;
|
---|
56 | short cnt;
|
---|
57 | unsigned short *ptr;
|
---|
58 | unsigned short *base;
|
---|
59 | unsigned short *tmpbuf;
|
---|
60 | Py_UInt32 offset;
|
---|
61 | Py_UInt32 rleend; /* for rle images */
|
---|
62 | Py_UInt32 *rowstart; /* for rle images */
|
---|
63 | Py_Int32 *rowsize; /* for rle images */
|
---|
64 | } IMAGE;
|
---|
65 |
|
---|
66 | #define IMAGIC 0732
|
---|
67 |
|
---|
68 | #define TYPEMASK 0xff00
|
---|
69 | #define BPPMASK 0x00ff
|
---|
70 | #define ITYPE_VERBATIM 0x0000
|
---|
71 | #define ITYPE_RLE 0x0100
|
---|
72 | #define ISRLE(type) (((type) & 0xff00) == ITYPE_RLE)
|
---|
73 | #define ISVERBATIM(type) (((type) & 0xff00) == ITYPE_VERBATIM)
|
---|
74 | #define BPP(type) ((type) & BPPMASK)
|
---|
75 | #define RLE(bpp) (ITYPE_RLE | (bpp))
|
---|
76 | #define VERBATIM(bpp) (ITYPE_VERBATIM | (bpp))
|
---|
77 | /*
|
---|
78 | * end of image.h stuff
|
---|
79 | *
|
---|
80 | */
|
---|
81 |
|
---|
82 | #define RINTLUM (79)
|
---|
83 | #define GINTLUM (156)
|
---|
84 | #define BINTLUM (21)
|
---|
85 |
|
---|
86 | #define ILUM(r,g,b) ((int)(RINTLUM*(r)+GINTLUM*(g)+BINTLUM*(b))>>8)
|
---|
87 |
|
---|
88 | #define OFFSET_R 3 /* this is byte order dependent */
|
---|
89 | #define OFFSET_G 2
|
---|
90 | #define OFFSET_B 1
|
---|
91 | #define OFFSET_A 0
|
---|
92 |
|
---|
93 | #define CHANOFFSET(z) (3-(z)) /* this is byte order dependent */
|
---|
94 |
|
---|
95 | static void expandrow(unsigned char *, unsigned char *, int);
|
---|
96 | static void setalpha(unsigned char *, int);
|
---|
97 | static void copybw(Py_Int32 *, int);
|
---|
98 | static void interleaverow(unsigned char*, unsigned char*, int, int);
|
---|
99 | static int compressrow(unsigned char *, unsigned char *, int, int);
|
---|
100 | static void lumrow(unsigned char *, unsigned char *, int);
|
---|
101 |
|
---|
102 | #ifdef ADD_TAGS
|
---|
103 | #define TAGLEN (5)
|
---|
104 | #else
|
---|
105 | #define TAGLEN (0)
|
---|
106 | #endif
|
---|
107 |
|
---|
108 | static PyObject *ImgfileError;
|
---|
109 |
|
---|
110 | static int reverse_order;
|
---|
111 |
|
---|
112 | #ifdef ADD_TAGS
|
---|
113 | /*
|
---|
114 | * addlongimgtag -
|
---|
115 | * this is used to extract image data from core dumps.
|
---|
116 | *
|
---|
117 | */
|
---|
118 | static void
|
---|
119 | addlongimgtag(Py_UInt32 *dptr, int xsize, int ysize)
|
---|
120 | {
|
---|
121 | dptr = dptr + (xsize * ysize);
|
---|
122 | dptr[0] = 0x12345678;
|
---|
123 | dptr[1] = 0x59493333;
|
---|
124 | dptr[2] = 0x69434222;
|
---|
125 | dptr[3] = xsize;
|
---|
126 | dptr[4] = ysize;
|
---|
127 | }
|
---|
128 | #endif
|
---|
129 |
|
---|
130 | /*
|
---|
131 | * byte order independent read/write of shorts and longs.
|
---|
132 | *
|
---|
133 | */
|
---|
134 | static unsigned short
|
---|
135 | getshort(FILE *inf)
|
---|
136 | {
|
---|
137 | unsigned char buf[2];
|
---|
138 |
|
---|
139 | fread(buf, 2, 1, inf);
|
---|
140 | return (buf[0] << 8) + (buf[1] << 0);
|
---|
141 | }
|
---|
142 |
|
---|
143 | static Py_UInt32
|
---|
144 | getlong(FILE *inf)
|
---|
145 | {
|
---|
146 | unsigned char buf[4];
|
---|
147 |
|
---|
148 | fread(buf, 4, 1, inf);
|
---|
149 | return (buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + (buf[3] << 0);
|
---|
150 | }
|
---|
151 |
|
---|
152 | static void
|
---|
153 | putshort(FILE *outf, unsigned short val)
|
---|
154 | {
|
---|
155 | unsigned char buf[2];
|
---|
156 |
|
---|
157 | buf[0] = (val >> 8);
|
---|
158 | buf[1] = (val >> 0);
|
---|
159 | fwrite(buf, 2, 1, outf);
|
---|
160 | }
|
---|
161 |
|
---|
162 | static int
|
---|
163 | putlong(FILE *outf, Py_UInt32 val)
|
---|
164 | {
|
---|
165 | unsigned char buf[4];
|
---|
166 |
|
---|
167 | buf[0] = (unsigned char) (val >> 24);
|
---|
168 | buf[1] = (unsigned char) (val >> 16);
|
---|
169 | buf[2] = (unsigned char) (val >> 8);
|
---|
170 | buf[3] = (unsigned char) (val >> 0);
|
---|
171 | return (int)fwrite(buf, 4, 1, outf);
|
---|
172 | }
|
---|
173 |
|
---|
174 | static void
|
---|
175 | readheader(FILE *inf, IMAGE *image)
|
---|
176 | {
|
---|
177 | memset(image ,0, sizeof(IMAGE));
|
---|
178 | image->imagic = getshort(inf);
|
---|
179 | image->type = getshort(inf);
|
---|
180 | image->dim = getshort(inf);
|
---|
181 | image->xsize = getshort(inf);
|
---|
182 | image->ysize = getshort(inf);
|
---|
183 | image->zsize = getshort(inf);
|
---|
184 | }
|
---|
185 |
|
---|
186 | static int
|
---|
187 | writeheader(FILE *outf, IMAGE *image)
|
---|
188 | {
|
---|
189 | IMAGE t;
|
---|
190 |
|
---|
191 | memset(&t, 0, sizeof(IMAGE));
|
---|
192 | fwrite(&t, sizeof(IMAGE), 1, outf);
|
---|
193 | fseek(outf, 0, SEEK_SET);
|
---|
194 | putshort(outf, image->imagic);
|
---|
195 | putshort(outf, image->type);
|
---|
196 | putshort(outf, image->dim);
|
---|
197 | putshort(outf, image->xsize);
|
---|
198 | putshort(outf, image->ysize);
|
---|
199 | putshort(outf, image->zsize);
|
---|
200 | putlong(outf, image->min);
|
---|
201 | putlong(outf, image->max);
|
---|
202 | putlong(outf, 0);
|
---|
203 | return (int)fwrite("no name", 8, 1, outf);
|
---|
204 | }
|
---|
205 |
|
---|
206 | static int
|
---|
207 | writetab(FILE *outf, /*unsigned*/ Py_Int32 *tab, int len)
|
---|
208 | {
|
---|
209 | int r = 0;
|
---|
210 |
|
---|
211 | while(len) {
|
---|
212 | r = putlong(outf, *tab++);
|
---|
213 | len--;
|
---|
214 | }
|
---|
215 | return r;
|
---|
216 | }
|
---|
217 |
|
---|
218 | static void
|
---|
219 | readtab(FILE *inf, /*unsigned*/ Py_Int32 *tab, int len)
|
---|
220 | {
|
---|
221 | while(len) {
|
---|
222 | *tab++ = getlong(inf);
|
---|
223 | len--;
|
---|
224 | }
|
---|
225 | }
|
---|
226 |
|
---|
227 | /*
|
---|
228 | * sizeofimage -
|
---|
229 | * return the xsize and ysize of an iris image file.
|
---|
230 | *
|
---|
231 | */
|
---|
232 | static PyObject *
|
---|
233 | sizeofimage(PyObject *self, PyObject *args)
|
---|
234 | {
|
---|
235 | char *name;
|
---|
236 | IMAGE image;
|
---|
237 | FILE *inf;
|
---|
238 |
|
---|
239 | if (!PyArg_ParseTuple(args, "s:sizeofimage", &name))
|
---|
240 | return NULL;
|
---|
241 |
|
---|
242 | inf = fopen(name, "rb");
|
---|
243 | if (!inf) {
|
---|
244 | PyErr_SetString(ImgfileError, "can't open image file");
|
---|
245 | return NULL;
|
---|
246 | }
|
---|
247 | readheader(inf, &image);
|
---|
248 | fclose(inf);
|
---|
249 | if (image.imagic != IMAGIC) {
|
---|
250 | PyErr_SetString(ImgfileError,
|
---|
251 | "bad magic number in image file");
|
---|
252 | return NULL;
|
---|
253 | }
|
---|
254 | return Py_BuildValue("(ii)", image.xsize, image.ysize);
|
---|
255 | }
|
---|
256 |
|
---|
257 | /*
|
---|
258 | * longimagedata -
|
---|
259 | * read in a B/W RGB or RGBA iris image file and return a
|
---|
260 | * pointer to an array of longs.
|
---|
261 | *
|
---|
262 | */
|
---|
263 | static PyObject *
|
---|
264 | longimagedata(PyObject *self, PyObject *args)
|
---|
265 | {
|
---|
266 | char *name;
|
---|
267 | unsigned char *base, *lptr;
|
---|
268 | unsigned char *rledat = NULL, *verdat = NULL;
|
---|
269 | Py_Int32 *starttab = NULL, *lengthtab = NULL;
|
---|
270 | FILE *inf = NULL;
|
---|
271 | IMAGE image;
|
---|
272 | int y, z, tablen;
|
---|
273 | int xsize, ysize, zsize;
|
---|
274 | int bpp, rle, cur, badorder;
|
---|
275 | int rlebuflen;
|
---|
276 | PyObject *rv = NULL;
|
---|
277 |
|
---|
278 | if (!PyArg_ParseTuple(args, "s:longimagedata", &name))
|
---|
279 | return NULL;
|
---|
280 |
|
---|
281 | inf = fopen(name,"rb");
|
---|
282 | if (!inf) {
|
---|
283 | PyErr_SetString(ImgfileError, "can't open image file");
|
---|
284 | return NULL;
|
---|
285 | }
|
---|
286 | readheader(inf,&image);
|
---|
287 | if (image.imagic != IMAGIC) {
|
---|
288 | PyErr_SetString(ImgfileError,
|
---|
289 | "bad magic number in image file");
|
---|
290 | goto finally;
|
---|
291 | }
|
---|
292 | rle = ISRLE(image.type);
|
---|
293 | bpp = BPP(image.type);
|
---|
294 | if (bpp != 1) {
|
---|
295 | PyErr_SetString(ImgfileError,
|
---|
296 | "image must have 1 byte per pix chan");
|
---|
297 | goto finally;
|
---|
298 | }
|
---|
299 | xsize = image.xsize;
|
---|
300 | ysize = image.ysize;
|
---|
301 | zsize = image.zsize;
|
---|
302 | if (rle) {
|
---|
303 | tablen = ysize * zsize * sizeof(Py_Int32);
|
---|
304 | starttab = (Py_Int32 *)malloc(tablen);
|
---|
305 | lengthtab = (Py_Int32 *)malloc(tablen);
|
---|
306 | rlebuflen = (int) (1.05 * xsize +10);
|
---|
307 | rledat = (unsigned char *)malloc(rlebuflen);
|
---|
308 | if (!starttab || !lengthtab || !rledat) {
|
---|
309 | PyErr_NoMemory();
|
---|
310 | goto finally;
|
---|
311 | }
|
---|
312 |
|
---|
313 | fseek(inf, 512, SEEK_SET);
|
---|
314 | readtab(inf, starttab, ysize*zsize);
|
---|
315 | readtab(inf, lengthtab, ysize*zsize);
|
---|
316 |
|
---|
317 | /* check data order */
|
---|
318 | cur = 0;
|
---|
319 | badorder = 0;
|
---|
320 | for(y = 0; y < ysize; y++) {
|
---|
321 | for(z = 0; z < zsize; z++) {
|
---|
322 | if (starttab[y + z * ysize] < cur) {
|
---|
323 | badorder = 1;
|
---|
324 | break;
|
---|
325 | }
|
---|
326 | cur = starttab[y +z * ysize];
|
---|
327 | }
|
---|
328 | if (badorder)
|
---|
329 | break;
|
---|
330 | }
|
---|
331 |
|
---|
332 | fseek(inf, 512 + 2 * tablen, SEEK_SET);
|
---|
333 | cur = 512 + 2 * tablen;
|
---|
334 | rv = PyString_FromStringAndSize((char *)NULL,
|
---|
335 | (xsize * ysize + TAGLEN) * sizeof(Py_Int32));
|
---|
336 | if (rv == NULL)
|
---|
337 | goto finally;
|
---|
338 |
|
---|
339 | base = (unsigned char *) PyString_AsString(rv);
|
---|
340 | #ifdef ADD_TAGS
|
---|
341 | addlongimgtag(base,xsize,ysize);
|
---|
342 | #endif
|
---|
343 | if (badorder) {
|
---|
344 | for (z = 0; z < zsize; z++) {
|
---|
345 | lptr = base;
|
---|
346 | if (reverse_order)
|
---|
347 | lptr += (ysize - 1) * xsize
|
---|
348 | * sizeof(Py_UInt32);
|
---|
349 | for (y = 0; y < ysize; y++) {
|
---|
350 | int idx = y + z * ysize;
|
---|
351 | if (cur != starttab[idx]) {
|
---|
352 | fseek(inf,starttab[idx],
|
---|
353 | SEEK_SET);
|
---|
354 | cur = starttab[idx];
|
---|
355 | }
|
---|
356 | if (lengthtab[idx] > rlebuflen) {
|
---|
357 | PyErr_SetString(ImgfileError,
|
---|
358 | "rlebuf is too small");
|
---|
359 | Py_DECREF(rv);
|
---|
360 | rv = NULL;
|
---|
361 | goto finally;
|
---|
362 | }
|
---|
363 | fread(rledat, lengthtab[idx], 1, inf);
|
---|
364 | cur += lengthtab[idx];
|
---|
365 | expandrow(lptr, rledat, 3-z);
|
---|
366 | if (reverse_order)
|
---|
367 | lptr -= xsize
|
---|
368 | * sizeof(Py_UInt32);
|
---|
369 | else
|
---|
370 | lptr += xsize
|
---|
371 | * sizeof(Py_UInt32);
|
---|
372 | }
|
---|
373 | }
|
---|
374 | } else {
|
---|
375 | lptr = base;
|
---|
376 | if (reverse_order)
|
---|
377 | lptr += (ysize - 1) * xsize
|
---|
378 | * sizeof(Py_UInt32);
|
---|
379 | for (y = 0; y < ysize; y++) {
|
---|
380 | for(z = 0; z < zsize; z++) {
|
---|
381 | int idx = y + z * ysize;
|
---|
382 | if (cur != starttab[idx]) {
|
---|
383 | fseek(inf, starttab[idx],
|
---|
384 | SEEK_SET);
|
---|
385 | cur = starttab[idx];
|
---|
386 | }
|
---|
387 | fread(rledat, lengthtab[idx], 1, inf);
|
---|
388 | cur += lengthtab[idx];
|
---|
389 | expandrow(lptr, rledat, 3-z);
|
---|
390 | }
|
---|
391 | if (reverse_order)
|
---|
392 | lptr -= xsize * sizeof(Py_UInt32);
|
---|
393 | else
|
---|
394 | lptr += xsize * sizeof(Py_UInt32);
|
---|
395 | }
|
---|
396 | }
|
---|
397 | if (zsize == 3)
|
---|
398 | setalpha(base, xsize * ysize);
|
---|
399 | else if (zsize < 3)
|
---|
400 | copybw((Py_Int32 *) base, xsize * ysize);
|
---|
401 | }
|
---|
402 | else {
|
---|
403 | rv = PyString_FromStringAndSize((char *) 0,
|
---|
404 | (xsize*ysize+TAGLEN)*sizeof(Py_Int32));
|
---|
405 | if (rv == NULL)
|
---|
406 | goto finally;
|
---|
407 |
|
---|
408 | base = (unsigned char *) PyString_AsString(rv);
|
---|
409 | #ifdef ADD_TAGS
|
---|
410 | addlongimgtag(base, xsize, ysize);
|
---|
411 | #endif
|
---|
412 | verdat = (unsigned char *)malloc(xsize);
|
---|
413 | if (!verdat) {
|
---|
414 | Py_CLEAR(rv);
|
---|
415 | goto finally;
|
---|
416 | }
|
---|
417 |
|
---|
418 | fseek(inf, 512, SEEK_SET);
|
---|
419 | for (z = 0; z < zsize; z++) {
|
---|
420 | lptr = base;
|
---|
421 | if (reverse_order)
|
---|
422 | lptr += (ysize - 1) * xsize
|
---|
423 | * sizeof(Py_UInt32);
|
---|
424 | for (y = 0; y < ysize; y++) {
|
---|
425 | fread(verdat, xsize, 1, inf);
|
---|
426 | interleaverow(lptr, verdat, 3-z, xsize);
|
---|
427 | if (reverse_order)
|
---|
428 | lptr -= xsize * sizeof(Py_UInt32);
|
---|
429 | else
|
---|
430 | lptr += xsize * sizeof(Py_UInt32);
|
---|
431 | }
|
---|
432 | }
|
---|
433 | if (zsize == 3)
|
---|
434 | setalpha(base, xsize * ysize);
|
---|
435 | else if (zsize < 3)
|
---|
436 | copybw((Py_Int32 *) base, xsize * ysize);
|
---|
437 | }
|
---|
438 | finally:
|
---|
439 | if (starttab)
|
---|
440 | free(starttab);
|
---|
441 | if (lengthtab)
|
---|
442 | free(lengthtab);
|
---|
443 | if (rledat)
|
---|
444 | free(rledat);
|
---|
445 | if (verdat)
|
---|
446 | free(verdat);
|
---|
447 | fclose(inf);
|
---|
448 | return rv;
|
---|
449 | }
|
---|
450 |
|
---|
451 | /* static utility functions for longimagedata */
|
---|
452 |
|
---|
453 | static void
|
---|
454 | interleaverow(unsigned char *lptr, unsigned char *cptr, int z, int n)
|
---|
455 | {
|
---|
456 | lptr += z;
|
---|
457 | while (n--) {
|
---|
458 | *lptr = *cptr++;
|
---|
459 | lptr += 4;
|
---|
460 | }
|
---|
461 | }
|
---|
462 |
|
---|
463 | static void
|
---|
464 | copybw(Py_Int32 *lptr, int n)
|
---|
465 | {
|
---|
466 | while (n >= 8) {
|
---|
467 | lptr[0] = 0xff000000 + (0x010101 * (lptr[0] & 0xff));
|
---|
468 | lptr[1] = 0xff000000 + (0x010101 * (lptr[1] & 0xff));
|
---|
469 | lptr[2] = 0xff000000 + (0x010101 * (lptr[2] & 0xff));
|
---|
470 | lptr[3] = 0xff000000 + (0x010101 * (lptr[3] & 0xff));
|
---|
471 | lptr[4] = 0xff000000 + (0x010101 * (lptr[4] & 0xff));
|
---|
472 | lptr[5] = 0xff000000 + (0x010101 * (lptr[5] & 0xff));
|
---|
473 | lptr[6] = 0xff000000 + (0x010101 * (lptr[6] & 0xff));
|
---|
474 | lptr[7] = 0xff000000 + (0x010101 * (lptr[7] & 0xff));
|
---|
475 | lptr += 8;
|
---|
476 | n -= 8;
|
---|
477 | }
|
---|
478 | while (n--) {
|
---|
479 | *lptr = 0xff000000 + (0x010101 * (*lptr&0xff));
|
---|
480 | lptr++;
|
---|
481 | }
|
---|
482 | }
|
---|
483 |
|
---|
484 | static void
|
---|
485 | setalpha(unsigned char *lptr, int n)
|
---|
486 | {
|
---|
487 | while (n >= 8) {
|
---|
488 | lptr[0 * 4] = 0xff;
|
---|
489 | lptr[1 * 4] = 0xff;
|
---|
490 | lptr[2 * 4] = 0xff;
|
---|
491 | lptr[3 * 4] = 0xff;
|
---|
492 | lptr[4 * 4] = 0xff;
|
---|
493 | lptr[5 * 4] = 0xff;
|
---|
494 | lptr[6 * 4] = 0xff;
|
---|
495 | lptr[7 * 4] = 0xff;
|
---|
496 | lptr += 4 * 8;
|
---|
497 | n -= 8;
|
---|
498 | }
|
---|
499 | while (n--) {
|
---|
500 | *lptr = 0xff;
|
---|
501 | lptr += 4;
|
---|
502 | }
|
---|
503 | }
|
---|
504 |
|
---|
505 | static void
|
---|
506 | expandrow(unsigned char *optr, unsigned char *iptr, int z)
|
---|
507 | {
|
---|
508 | unsigned char pixel, count;
|
---|
509 |
|
---|
510 | optr += z;
|
---|
511 | while (1) {
|
---|
512 | pixel = *iptr++;
|
---|
513 | if (!(count = (pixel & 0x7f)))
|
---|
514 | return;
|
---|
515 | if (pixel & 0x80) {
|
---|
516 | while (count >= 8) {
|
---|
517 | optr[0 * 4] = iptr[0];
|
---|
518 | optr[1 * 4] = iptr[1];
|
---|
519 | optr[2 * 4] = iptr[2];
|
---|
520 | optr[3 * 4] = iptr[3];
|
---|
521 | optr[4 * 4] = iptr[4];
|
---|
522 | optr[5 * 4] = iptr[5];
|
---|
523 | optr[6 * 4] = iptr[6];
|
---|
524 | optr[7 * 4] = iptr[7];
|
---|
525 | optr += 8 * 4;
|
---|
526 | iptr += 8;
|
---|
527 | count -= 8;
|
---|
528 | }
|
---|
529 | while (count--) {
|
---|
530 | *optr = *iptr++;
|
---|
531 | optr += 4;
|
---|
532 | }
|
---|
533 | }
|
---|
534 | else {
|
---|
535 | pixel = *iptr++;
|
---|
536 | while (count >= 8) {
|
---|
537 | optr[0 * 4] = pixel;
|
---|
538 | optr[1 * 4] = pixel;
|
---|
539 | optr[2 * 4] = pixel;
|
---|
540 | optr[3 * 4] = pixel;
|
---|
541 | optr[4 * 4] = pixel;
|
---|
542 | optr[5 * 4] = pixel;
|
---|
543 | optr[6 * 4] = pixel;
|
---|
544 | optr[7 * 4] = pixel;
|
---|
545 | optr += 8 * 4;
|
---|
546 | count -= 8;
|
---|
547 | }
|
---|
548 | while (count--) {
|
---|
549 | *optr = pixel;
|
---|
550 | optr += 4;
|
---|
551 | }
|
---|
552 | }
|
---|
553 | }
|
---|
554 | }
|
---|
555 |
|
---|
556 | /*
|
---|
557 | * longstoimage -
|
---|
558 | * copy an array of longs to an iris image file. Each long
|
---|
559 | * represents one pixel. xsize and ysize specify the dimensions of
|
---|
560 | * the pixel array. zsize specifies what kind of image file to
|
---|
561 | * write out. if zsize is 1, the luminance of the pixels are
|
---|
562 | * calculated, and a single channel black and white image is saved.
|
---|
563 | * If zsize is 3, an RGB image file is saved. If zsize is 4, an
|
---|
564 | * RGBA image file is saved.
|
---|
565 | *
|
---|
566 | */
|
---|
567 | static PyObject *
|
---|
568 | longstoimage(PyObject *self, PyObject *args)
|
---|
569 | {
|
---|
570 | unsigned char *lptr;
|
---|
571 | char *name;
|
---|
572 | int xsize, ysize, zsize;
|
---|
573 | FILE *outf = NULL;
|
---|
574 | IMAGE image;
|
---|
575 | int tablen, y, z, pos, len;
|
---|
576 | Py_Int32 *starttab = NULL, *lengthtab = NULL;
|
---|
577 | unsigned char *rlebuf = NULL;
|
---|
578 | unsigned char *lumbuf = NULL;
|
---|
579 | int rlebuflen;
|
---|
580 | Py_ssize_t goodwrite;
|
---|
581 | PyObject *retval = NULL;
|
---|
582 |
|
---|
583 | if (!PyArg_ParseTuple(args, "s#iiis:longstoimage", &lptr, &len,
|
---|
584 | &xsize, &ysize, &zsize, &name))
|
---|
585 | return NULL;
|
---|
586 |
|
---|
587 | goodwrite = 1;
|
---|
588 | outf = fopen(name, "wb");
|
---|
589 | if (!outf) {
|
---|
590 | PyErr_SetString(ImgfileError, "can't open output file");
|
---|
591 | return NULL;
|
---|
592 | }
|
---|
593 | tablen = ysize * zsize * sizeof(Py_Int32);
|
---|
594 |
|
---|
595 | starttab = (Py_Int32 *)malloc(tablen);
|
---|
596 | lengthtab = (Py_Int32 *)malloc(tablen);
|
---|
597 | rlebuflen = (int) (1.05 * xsize + 10);
|
---|
598 | rlebuf = (unsigned char *)malloc(rlebuflen);
|
---|
599 | lumbuf = (unsigned char *)malloc(xsize * sizeof(Py_Int32));
|
---|
600 | if (!starttab || !lengthtab || !rlebuf || !lumbuf) {
|
---|
601 | PyErr_NoMemory();
|
---|
602 | goto finally;
|
---|
603 | }
|
---|
604 |
|
---|
605 | memset(&image, 0, sizeof(IMAGE));
|
---|
606 | image.imagic = IMAGIC;
|
---|
607 | image.type = RLE(1);
|
---|
608 | if (zsize>1)
|
---|
609 | image.dim = 3;
|
---|
610 | else
|
---|
611 | image.dim = 2;
|
---|
612 | image.xsize = xsize;
|
---|
613 | image.ysize = ysize;
|
---|
614 | image.zsize = zsize;
|
---|
615 | image.min = 0;
|
---|
616 | image.max = 255;
|
---|
617 | goodwrite *= writeheader(outf, &image);
|
---|
618 | pos = 512 + 2 * tablen;
|
---|
619 | fseek(outf, pos, SEEK_SET);
|
---|
620 | if (reverse_order)
|
---|
621 | lptr += (ysize - 1) * xsize * sizeof(Py_UInt32);
|
---|
622 | for (y = 0; y < ysize; y++) {
|
---|
623 | for (z = 0; z < zsize; z++) {
|
---|
624 | if (zsize == 1) {
|
---|
625 | lumrow(lptr, lumbuf, xsize);
|
---|
626 | len = compressrow(lumbuf, rlebuf,
|
---|
627 | CHANOFFSET(z), xsize);
|
---|
628 | } else {
|
---|
629 | len = compressrow(lptr, rlebuf,
|
---|
630 | CHANOFFSET(z), xsize);
|
---|
631 | }
|
---|
632 | if(len > rlebuflen) {
|
---|
633 | PyErr_SetString(ImgfileError,
|
---|
634 | "rlebuf is too small");
|
---|
635 | goto finally;
|
---|
636 | }
|
---|
637 | goodwrite *= fwrite(rlebuf, len, 1, outf);
|
---|
638 | starttab[y + z * ysize] = pos;
|
---|
639 | lengthtab[y + z * ysize] = len;
|
---|
640 | pos += len;
|
---|
641 | }
|
---|
642 | if (reverse_order)
|
---|
643 | lptr -= xsize * sizeof(Py_UInt32);
|
---|
644 | else
|
---|
645 | lptr += xsize * sizeof(Py_UInt32);
|
---|
646 | }
|
---|
647 |
|
---|
648 | fseek(outf, 512, SEEK_SET);
|
---|
649 | goodwrite *= writetab(outf, starttab, ysize*zsize);
|
---|
650 | goodwrite *= writetab(outf, lengthtab, ysize*zsize);
|
---|
651 | if (goodwrite) {
|
---|
652 | Py_INCREF(Py_None);
|
---|
653 | retval = Py_None;
|
---|
654 | } else
|
---|
655 | PyErr_SetString(ImgfileError, "not enough space for image");
|
---|
656 |
|
---|
657 | finally:
|
---|
658 | fclose(outf);
|
---|
659 | free(starttab);
|
---|
660 | free(lengthtab);
|
---|
661 | free(rlebuf);
|
---|
662 | free(lumbuf);
|
---|
663 | return retval;
|
---|
664 | }
|
---|
665 |
|
---|
666 | /* static utility functions for longstoimage */
|
---|
667 |
|
---|
668 | static void
|
---|
669 | lumrow(unsigned char *rgbptr, unsigned char *lumptr, int n)
|
---|
670 | {
|
---|
671 | lumptr += CHANOFFSET(0);
|
---|
672 | while (n--) {
|
---|
673 | *lumptr = ILUM(rgbptr[OFFSET_R],
|
---|
674 | rgbptr[OFFSET_G],
|
---|
675 | rgbptr[OFFSET_B]);
|
---|
676 | lumptr += 4;
|
---|
677 | rgbptr += 4;
|
---|
678 | }
|
---|
679 | }
|
---|
680 |
|
---|
681 | static int
|
---|
682 | compressrow(unsigned char *lbuf, unsigned char *rlebuf, int z, int cnt)
|
---|
683 | {
|
---|
684 | unsigned char *iptr, *ibufend, *sptr, *optr;
|
---|
685 | short todo, cc;
|
---|
686 | Py_Int32 count;
|
---|
687 |
|
---|
688 | lbuf += z;
|
---|
689 | iptr = lbuf;
|
---|
690 | ibufend = iptr + cnt * 4;
|
---|
691 | optr = rlebuf;
|
---|
692 |
|
---|
693 | while(iptr < ibufend) {
|
---|
694 | sptr = iptr;
|
---|
695 | iptr += 8;
|
---|
696 | while ((iptr<ibufend) &&
|
---|
697 | ((iptr[-8]!=iptr[-4]) ||(iptr[-4]!=iptr[0])))
|
---|
698 | {
|
---|
699 | iptr += 4;
|
---|
700 | }
|
---|
701 | iptr -= 8;
|
---|
702 | count = (iptr - sptr) / 4;
|
---|
703 | while (count) {
|
---|
704 | todo = count > 126 ? 126 : (short)count;
|
---|
705 | count -= todo;
|
---|
706 | *optr++ = 0x80 | todo;
|
---|
707 | while (todo > 8) {
|
---|
708 | optr[0] = sptr[0 * 4];
|
---|
709 | optr[1] = sptr[1 * 4];
|
---|
710 | optr[2] = sptr[2 * 4];
|
---|
711 | optr[3] = sptr[3 * 4];
|
---|
712 | optr[4] = sptr[4 * 4];
|
---|
713 | optr[5] = sptr[5 * 4];
|
---|
714 | optr[6] = sptr[6 * 4];
|
---|
715 | optr[7] = sptr[7 * 4];
|
---|
716 | optr += 8;
|
---|
717 | sptr += 8 * 4;
|
---|
718 | todo -= 8;
|
---|
719 | }
|
---|
720 | while (todo--) {
|
---|
721 | *optr++ = *sptr;
|
---|
722 | sptr += 4;
|
---|
723 | }
|
---|
724 | }
|
---|
725 | sptr = iptr;
|
---|
726 | cc = *iptr;
|
---|
727 | iptr += 4;
|
---|
728 | while ((iptr < ibufend) && (*iptr == cc))
|
---|
729 | iptr += 4;
|
---|
730 | count = (iptr - sptr) / 4;
|
---|
731 | while (count) {
|
---|
732 | todo = count > 126 ? 126 : (short)count;
|
---|
733 | count -= todo;
|
---|
734 | *optr++ = (unsigned char) todo;
|
---|
735 | *optr++ = (unsigned char) cc;
|
---|
736 | }
|
---|
737 | }
|
---|
738 | *optr++ = 0;
|
---|
739 | return optr - (unsigned char *)rlebuf;
|
---|
740 | }
|
---|
741 |
|
---|
742 | static PyObject *
|
---|
743 | ttob(PyObject *self, PyObject *args)
|
---|
744 | {
|
---|
745 | int order, oldorder;
|
---|
746 |
|
---|
747 | if (!PyArg_ParseTuple(args, "i:ttob", &order))
|
---|
748 | return NULL;
|
---|
749 | oldorder = reverse_order;
|
---|
750 | reverse_order = order;
|
---|
751 | return PyInt_FromLong(oldorder);
|
---|
752 | }
|
---|
753 |
|
---|
754 | static PyMethodDef
|
---|
755 | rgbimg_methods[] = {
|
---|
756 | {"sizeofimage", sizeofimage, METH_VARARGS},
|
---|
757 | {"longimagedata", longimagedata, METH_VARARGS},
|
---|
758 | {"longstoimage", longstoimage, METH_VARARGS},
|
---|
759 | {"ttob", ttob, METH_VARARGS},
|
---|
760 | {NULL, NULL} /* sentinel */
|
---|
761 | };
|
---|
762 |
|
---|
763 |
|
---|
764 | PyMODINIT_FUNC
|
---|
765 | initrgbimg(void)
|
---|
766 | {
|
---|
767 | PyObject *m, *d;
|
---|
768 | m = Py_InitModule("rgbimg", rgbimg_methods);
|
---|
769 | if (m == NULL)
|
---|
770 | return;
|
---|
771 |
|
---|
772 | if (PyErr_Warn(PyExc_DeprecationWarning,
|
---|
773 | "the rgbimg module is deprecated"))
|
---|
774 | return;
|
---|
775 |
|
---|
776 | d = PyModule_GetDict(m);
|
---|
777 | ImgfileError = PyErr_NewException("rgbimg.error", NULL, NULL);
|
---|
778 | if (ImgfileError != NULL)
|
---|
779 | PyDict_SetItemString(d, "error", ImgfileError);
|
---|
780 | }
|
---|