[ViewVC] Diff of: cvs/CV/CV.xs

Comparing CV/CV.xs (file contents):
Revision 1.11 by root, Tue Feb 8 10:43:44 2005 UTC vs.
Revision 1.29 by root, Sat Sep 24 01:25:17 2005 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
		5	#include <string.h>
		6	#include <setjmp.h>
		7
		8	#include <jpeglib.h>
		9	#include <glib.h>
		10	#include <gtk/gtk.h>
5	#include <gdk-pixbuf/gdk-pixbuf.h>	11	#include <gdk-pixbuf/gdk-pixbuf.h>
6		12
7	#include <gperl.h>	13	#include <gperl.h>
8	#include <gtk2perl.h>	14	#include <gtk2perl.h>
9		15
10	#define IW 80	16	#define IW 80 /* MUST match Schnauer.pm! */
		17	#define IH 60 /* MUST match Schnauer.pm! */
11		18
12	#define RAND (seed = (seed + 7141) * 54773 % 134456)	19	#define RAND (seed = (seed + 7141) * 54773 % 134456)
13		20
14	#define LINELENGTH 240	21	#define LINELENGTH 240
15		22
16	#define ELLIPSIS "\xe2\x80\xa6"	23	#define ELLIPSIS "\xe2\x80\xa6"
		24
		25	struct jpg_err_mgr
		26	{
		27	struct jpeg_error_mgr err;
		28	jmp_buf setjmp_buffer;
		29	};
		30
		31	static void
		32	cv_error_exit (j_common_ptr cinfo)
		33	{
		34	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
		35	}
		36
		37	static void
		38	cv_error_output (j_common_ptr cinfo)
		39	{
		40	return;
		41	}
		42
		43	static void
		44	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
		45	unsigned int h, unsigned int s, unsigned int *v)
		46	{
		47	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
		48	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
		49	unsigned int delta = mx - mn;
		50
		51	*v = mx;
		52
		53	s = mx ? delta 255 / mx : 0;
		54
		55	if (delta == 0)
		56	*h = 0;
		57	else
		58	{
		59	if (r == mx)
		60	h = ((int)g - (int)b) 255 / (int)(delta * 3);
		61	else if (g == mx)
		62	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
		63	else if (b == mx)
		64	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
		65
		66	*h &= 255;
		67	}
		68	}
17		69
18	static guint32 a85_val;	70	static guint32 a85_val;
19	static guint a85_cnt;	71	static guint a85_cnt;
20	static guchar a85_buf[LINELENGTH], *a85_ptr;	72	static guchar a85_buf[LINELENGTH], *a85_ptr;
21		73
68	*a85_ptr++ = '\n';	120	*a85_ptr++ = '\n';
69		121
70	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	122	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
71	}	123	}
72		124
73	static void
74	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
75	unsigned int h, unsigned int s, unsigned int *v)
76	{
77	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
78	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
79	unsigned int delta = mx - mn;
80
81	*v = mx;
82
83	s = mx ? delta 255 / mx : 0;
84
85	if (delta == 0)
86	*h = 0;
87	else
88	{
89	if (r == mx)
90	h = ((int)g - (int)b) 255 / (int)(delta * 3);
91	else if (g == mx)
92	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
93	else if (b == mx)
94	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
95
96	*h &= 255;
97	}
98	}
99
100	/////////////////////////////////////////////////////////////////////////////	125	/////////////////////////////////////////////////////////////////////////////
101		126
102	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	127	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
103		128
104	PROTOTYPES: ENABLE	129	PROTOTYPES: ENABLE
105		130
		131	# missing function in perl. really :)
		132	int
		133	common_prefix_length (a, b)
		134	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		135	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		136	CODE:
		137	RETVAL = 0;
		138
		139	while (a == b && *a)
		140	{
		141	RETVAL += (*a & 0xc0) != 0x80;
		142	a++, b++;
		143	}
		144
		145	OUTPUT:
		146	RETVAL
		147
		148	# missing in Gtk2 perl module
		149
		150	gboolean
		151	gdk_net_wm_supports (GdkAtom property)
		152	CODE:
		153	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		154	RETVAL = gdk_net_wm_supports (property);
		155	#else
		156	RETVAL = 0;
		157	#endif
		158	OUTPUT:
		159	RETVAL
		160
106	GdkPixbuf_noinc *	161	GdkPixbuf_noinc *
107	transpose (GdkPixbuf *pb)	162	dealpha_expose (GdkPixbuf *pb)
108	CODE:	163	CODE:
109	{	164	{
110	int w = gdk_pixbuf_get_width (pb);	165	int w = gdk_pixbuf_get_width (pb);
111	int h = gdk_pixbuf_get_height (pb);	166	int h = gdk_pixbuf_get_height (pb);
112	int bpp = gdk_pixbuf_get_n_channels (pb);	167	int bpp = gdk_pixbuf_get_n_channels (pb);
113	int x, y, i;	168	int x, y, i;
114	guchar src = gdk_pixbuf_get_pixels (pb), dst;	169	guchar src = gdk_pixbuf_get_pixels (pb), dst;
115	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	170	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
116		171
117	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	172	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
118		173
119	dst = gdk_pixbuf_get_pixels (RETVAL);	174	dst = gdk_pixbuf_get_pixels (RETVAL);
120	dstr = gdk_pixbuf_get_rowstride (RETVAL);	175	dstr = gdk_pixbuf_get_rowstride (RETVAL);
121		176
122	for (y = 0; y < h; y++)
123	for (x = 0; x < w; x++)	177	for (x = 0; x < w; x++)
		178	for (y = 0; y < h; y++)
124	for (i = 0; i < bpp; i++)	179	for (i = 0; i < 3; i++)
125	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	180	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
126	}	181	}
127	OUTPUT:	182	OUTPUT:
128	RETVAL	183	RETVAL
129		184
130	GdkPixbuf_noinc *	185	GdkPixbuf_noinc *
131	flop (GdkPixbuf *pb)	186	rotate (GdkPixbuf *pb, int angle)
132	CODE:	187	CODE:
133	{	188	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
134	int w = gdk_pixbuf_get_width (pb);	189	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
135	int h = gdk_pixbuf_get_height (pb);	190	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
136	int bpp = gdk_pixbuf_get_n_channels (pb);	191	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
137	int x, y, i;	192	: angle);
138	guchar src = gdk_pixbuf_get_pixels (pb), dst;	193	OUTPUT:
139	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	194	RETVAL
140		195
141	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	196	GdkPixbuf_noinc *
		197	load_jpeg (SV *path, int thumbnail=0)
		198	CODE:
		199	{
		200	struct jpeg_decompress_struct cinfo;
		201	struct jpg_err_mgr jerr;
		202	guchar *data;
		203	int rs;
		204	FILE *fp;
		205	volatile GdkPixbuf *pb = 0;
		206	gchar *filename;
142		207
		208	RETVAL = 0;
		209
		210	filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);
		211	fp = fopen (filename, "rb");
		212	g_free (filename);
		213
		214	if (!fp)
		215	XSRETURN_UNDEF;
		216
		217	cinfo.err = jpeg_std_error (&jerr.err);
		218
		219	jerr.err.error_exit = cv_error_exit;
		220	jerr.err.output_message = cv_error_output;
		221
		222	if ((rs = setjmp (jerr.setjmp_buffer)))
		223	{
		224	fclose (fp);
		225	jpeg_destroy_decompress (&cinfo);
		226
		227	if (pb)
		228	g_object_unref ((gpointer)pb);
		229
		230	XSRETURN_UNDEF;
		231	}
		232
		233	jpeg_create_decompress (&cinfo);
		234
		235	jpeg_stdio_src (&cinfo, fp);
		236	jpeg_read_header (&cinfo, TRUE);
		237
		238	cinfo.dct_method = JDCT_DEFAULT;
		239	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		240	cinfo.do_block_smoothing = FALSE;
		241	cinfo.out_color_space = JCS_RGB;
		242	cinfo.quantize_colors = FALSE;
		243
		244	cinfo.scale_num = 1;
		245	cinfo.scale_denom = 1;
		246
		247	jpeg_calc_output_dimensions (&cinfo);
		248
		249	if (thumbnail)
		250	{
		251	cinfo.dct_method = JDCT_FASTEST;
		252	cinfo.do_fancy_upsampling = FALSE;
		253
		254	while (cinfo.scale_denom < 8
		255	&& cinfo.output_width >= IW*4
		256	&& cinfo.output_height >= IH*4)
		257	{
		258	cinfo.scale_denom <<= 1;
		259	jpeg_calc_output_dimensions (&cinfo);
		260	}
		261	}
		262
		263	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
		264	if (!RETVAL)
		265	longjmp (jerr.setjmp_buffer, 2);
		266
143	dst = gdk_pixbuf_get_pixels (RETVAL);	267	data = gdk_pixbuf_get_pixels (RETVAL);
144	dstr = gdk_pixbuf_get_rowstride (RETVAL);	268	rs = gdk_pixbuf_get_rowstride (RETVAL);
145		269
146	for (y = 0; y < h; y++)	270	if (cinfo.output_components != 3)
147	for (x = 0; x < w; x++)	271	longjmp (jerr.setjmp_buffer, 3);
148	for (i = 0; i < bpp; i++)	272
149	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];	273	jpeg_start_decompress (&cinfo);
		274
		275	while (cinfo.output_scanline < cinfo.output_height)
		276	{
		277	int remaining = cinfo.output_height - cinfo.output_scanline;
		278	JSAMPROW rp[4];
		279
		280	rp [0] = data + cinfo.output_scanline * rs;
		281	rp [1] = (guchar *)rp [0] + rs;
		282	rp [2] = (guchar *)rp [1] + rs;
		283	rp [3] = (guchar *)rp [2] + rs;
		284
		285	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		286	}
		287
		288	jpeg_finish_decompress (&cinfo);
		289	fclose (fp);
		290	jpeg_destroy_decompress (&cinfo);
150	}	291	}
151	OUTPUT:	292	OUTPUT:
152	RETVAL	293	RETVAL
153		294
154	#############################################################################	295	#############################################################################
155		296
156	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	297	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
157		298
		299	SV *
		300	foldcase (SV *pathsv)
		301	PROTOTYPE: $
		302	CODE:
		303	{
		304	STRLEN plen;
		305	U8 path = (U8 )SvPVutf8 (pathsv, plen);
		306	U8 *pend = path + plen;
		307	U8 dst [plen * 6 * 3], *dstp = dst;
		308
		309	while (path < pend)
		310	{
		311	U8 ch = *path;
		312
		313	if (ch >= 'a' && ch <= 'z')
		314	dstp++ = path++;
		315	else if (ch >= '0' && ch <= '9')
		316	{
		317	STRLEN el, nl = 0;
		318	while (path >= '0' && path <= '9' && path < pend)
		319	path++, nl++;
		320
		321	for (el = nl; el < 6; el++)
		322	*dstp++ = '0';
		323
		324	memcpy (dstp, path - nl, nl);
		325	dstp += nl;
		326	}
		327	else
		328	{
		329	STRLEN cl;
		330	to_utf8_fold (path, dstp, &cl);
		331	dstp += cl;
		332	path += is_utf8_char (path);
		333	}
		334	}
		335
		336	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		337	}
		338	OUTPUT:
		339	RETVAL
		340
158	GdkPixbuf_noinc *	341	GdkPixbuf_noinc *
159	p7_to_pb (int w, int h, guchar *src)	342	p7_to_pb (int w, int h, SV *src_sv)
		343	PROTOTYPE: @
160	CODE:	344	CODE:
161	{	345	{
162	int x, y;	346	int x, y;
163	guchar dst, d;	347	guchar dst, d;
164	int dstr;	348	int dstr;
		349	guchar src = (guchar )SvPVbyte_nolen (src_sv);
165		350
166	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	351	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
167	dst = gdk_pixbuf_get_pixels (RETVAL);	352	dst = gdk_pixbuf_get_pixels (RETVAL);
168	dstr = gdk_pixbuf_get_rowstride (RETVAL);	353	dstr = gdk_pixbuf_get_rowstride (RETVAL);
169		354
…		…
178	}	363	}
179	}	364	}
180	OUTPUT:	365	OUTPUT:
181	RETVAL	366	RETVAL
182		367
		368	#############################################################################
		369
		370	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		371
		372	void
		373	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		374	CODE:
		375	{
		376	int w = gdk_pixbuf_get_width (pb);
		377	int h = gdk_pixbuf_get_height (pb);
		378	int x, y, i;
		379	guchar *dst;
		380	int bpp = gdk_pixbuf_get_n_channels (pb);
		381	guchar *src = gdk_pixbuf_get_pixels (pb);
		382	int sstr = gdk_pixbuf_get_rowstride (pb);
		383
		384	a85_init ();
		385
		386	for (y = 0; y < h; y++)
		387	for (x = 0; x < w; x++)
		388	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		389	a85_push (fp, src [x * bpp + y * sstr + i]);
		390
		391	a85_finish (fp);
		392	}
		393
		394	void
		395	dump_binary (PerlIO fp, GdkPixbuf pb)
		396	CODE:
		397	{
		398	int w = gdk_pixbuf_get_width (pb);
		399	int h = gdk_pixbuf_get_height (pb);
		400	int x, y, i;
		401	guchar *dst;
		402	int bpp = gdk_pixbuf_get_n_channels (pb);
		403	guchar *src = gdk_pixbuf_get_pixels (pb);
		404	int sstr = gdk_pixbuf_get_rowstride (pb);
		405
		406	for (y = 0; y < h; y++)
		407	for (x = 0; x < w; x++)
		408	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		409	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		410	}
		411
		412	#############################################################################
		413
		414	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		415
183	SV *	416	SV *
184	pb_to_p7 (GdkPixbuf *pb)	417	pb_to_hv84 (GdkPixbuf *pb)
185	CODE:	418	CODE:
186	{	419	{
187	int w = gdk_pixbuf_get_width (pb);	420	int w = gdk_pixbuf_get_width (pb);
188	int h = gdk_pixbuf_get_height (pb);	421	int h = gdk_pixbuf_get_height (pb);
189	int x, y;	422	int x, y;
190	guchar *dst;	423	guchar *dst;
191	int bpp = gdk_pixbuf_get_n_channels (pb);	424	int bpp = gdk_pixbuf_get_n_channels (pb);
192	guchar *src = gdk_pixbuf_get_pixels (pb);	425	guchar *src = gdk_pixbuf_get_pixels (pb);
193	int sstr = gdk_pixbuf_get_rowstride (pb);	426	int sstr = gdk_pixbuf_get_rowstride (pb);
194	int Er[IW], Eg[IW], Eb[IW];
195	int seed = 77;
196
197	RETVAL = newSV (w * h);
198	SvPOK_only (RETVAL);
199	SvCUR_set (RETVAL, w * h);
200
201	dst = SvPVX (RETVAL);
202
203	memset (Er, 0, sizeof (int) * IW);
204	memset (Eg, 0, sizeof (int) * IW);
205	memset (Eb, 0, sizeof (int) * IW);
206
207	/* some primitive error distribution + random dithering */
208
209	for (y = 0; y < h; y++)
210	{
211	int er = 0, eg = 0, eb = 0;
212
213	for (x = 0; x < w; x++)
214	{
215	int r, g, b;
216	guchar p = src + x bpp + y * sstr;
217
218	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
219	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
220	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
221
222	r = r > 7 ? 7 : r < 0 ? 0 : r;
223	g = g > 7 ? 7 : g < 0 ? 0 : g;
224	b = b > 3 ? 3 : b < 0 ? 0 : b;
225
226	er += p[0] - (r * 255 + 4) / 7;
227	eg += p[1] - (g * 255 + 4) / 7;
228	eb += p[2] - (b * 255 + 2) / 3;
229
230	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
231	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
232	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;
233
234	*dst++ = r << 5 \| g << 2 \| b;
235	}
236	}
237	}
238	OUTPUT:
239	RETVAL
240
241	SV *
242	make_histogram (SV *ar)
243	CODE:
244	{
245	int i;
246	AV av, result;
247
248	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
249	croak ("Not an array ref as first argument to make_histogram");
250
251	av = (AV *) SvRV (ar);
252	result = newAV ();
253
254	for (i = 0; i <= av_len (av); ++i)
255	{
256	int bigst, j;
257	SV sv = av_fetch (av, i, 1);
258	STRLEN len;
259	char *buf = SvPVbyte (sv, len);
260
261	int tmphist[256];
262	char *hist;
263
264	SV *histsv = newSV (257);
265	sv_upgrade (histsv, SVt_PV);
266	SvCUR_set (histsv, 256);
267	hist = SvPV_nolen (histsv);
268
269	Zero (tmphist, 256, int);
270
271	while (len--)
272	++tmphist[(unsigned char)*buf++];
273
274	bigst = 1;
275	for (j = 0; j < 256; ++j)
276	if (tmphist[j] > bigst)
277	bigst = tmphist[j];
278
279	for (j = 0; j < 256; ++j)
280	hist[j] = tmphist[j] * 255 / bigst;
281
282	av_push (result, histsv);
283	}
284
285	RETVAL = newRV_noinc ((SV *)result);
286	}
287	OUTPUT:
288	RETVAL
289
290
291
292	#############################################################################
293
294	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
295
296	void
297	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
298	CODE:
299	{
300	int w = gdk_pixbuf_get_width (pb);
301	int h = gdk_pixbuf_get_height (pb);
302	int x, y, i;
303	guchar *dst;
304	int bpp = gdk_pixbuf_get_n_channels (pb);
305	guchar *src = gdk_pixbuf_get_pixels (pb);
306	int sstr = gdk_pixbuf_get_rowstride (pb);
307
308	a85_init ();
309
310	for (y = 0; y < h; y++)
311	for (x = 0; x < w; x++)
312	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
313	a85_push (fp, src [x * bpp + y * sstr + i]);
314
315	a85_finish (fp);
316	}
317
318	void
319	dump_binary (PerlIO fp, GdkPixbuf pb)
320	CODE:
321	{
322	int w = gdk_pixbuf_get_width (pb);
323	int h = gdk_pixbuf_get_height (pb);
324	int x, y, i;
325	guchar *dst;
326	int bpp = gdk_pixbuf_get_n_channels (pb);
327	guchar *src = gdk_pixbuf_get_pixels (pb);
328	int sstr = gdk_pixbuf_get_rowstride (pb);
329
330	for (y = 0; y < h; y++)
331	for (x = 0; x < w; x++)
332	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
333	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
334	}
335
336	#############################################################################
337
338	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
339
340	SV *
341	pb_to_hv84 (GdkPixbuf *pb)
342	CODE:
343	{
344	int w = gdk_pixbuf_get_width (pb);
345	int h = gdk_pixbuf_get_height (pb);
346	int x, y;
347	guchar *dst;
348	int bpp = gdk_pixbuf_get_n_channels (pb);
349	guchar *src = gdk_pixbuf_get_pixels (pb);
350	int sstr = gdk_pixbuf_get_rowstride (pb);
351		427
352	RETVAL = newSV (6 * 8 * 12 / 8);	428	RETVAL = newSV (6 * 8 * 12 / 8);
353	SvPOK_only (RETVAL);	429	SvPOK_only (RETVAL);
354	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	430	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
355		431
356	dst = SvPVX (RETVAL);	432	dst = (guchar *)SvPVX (RETVAL);
357		433
358	/* some primitive error distribution + random dithering */	434	/* some primitive error distribution + random dithering */
359		435
360	for (y = 0; y < h; y++)	436	for (y = 0; y < h; y++)
361	{	437	{
…		…
419	}	495	}
420	}	496	}
421	OUTPUT:	497	OUTPUT:
422	RETVAL	498	RETVAL
423		499
		500	#############################################################################
424		501
		502	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
425		503
		504	SV *
		505	make_histograms (SV *ar)
		506	CODE:
		507	{
		508	int i;
		509	AV av, result;
		510
		511	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		512	croak ("Not an array ref as first argument to make_histogram");
		513
		514	av = (AV *) SvRV (ar);
		515	result = newAV ();
		516
		517	for (i = 0; i <= av_len (av); ++i)
		518	{
		519	const int HISTSIZE = 64;
		520
		521	int j;
		522	SV sv = av_fetch (av, i, 1);
		523	STRLEN len;
		524	char *buf = SvPVbyte (sv, len);
		525
		526	int tmphist[HISTSIZE];
		527	float *hist;
		528
		529	SV histsv = newSV (HISTSIZE sizeof (float) + 1);
		530	SvPOK_on (histsv);
		531	SvCUR_set (histsv, HISTSIZE * sizeof (float));
		532	hist = (float *)SvPVX (histsv);
		533
		534	Zero (tmphist, sizeof (tmphist), char);
		535
		536	for (j = len; j--; )
		537	{
		538	unsigned int idx
		539	= ((*buf & 0xc0) >> 2)
		540	\| ((*buf & 0x18) >> 1)
		541	\| (*buf & 0x03);
		542
		543	++tmphist[idx];
		544	++buf;
		545	}
		546
		547	for (j = 0; j < HISTSIZE; ++j)
		548	hist[j] = (float)tmphist[j] / (len + 1e-30);
		549
		550	av_push (result, histsv);
		551	}
		552
		553	RETVAL = newRV_noinc ((SV *)result);
		554	}
		555	OUTPUT:
		556	RETVAL
		557
		558

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Comparing CV/CV.xs (file contents): Revision 1.11 by root, Tue Feb 8 10:43:44 2005 UTC vs. Revision 1.29 by root, Sat Sep 24 01:25:17 2005 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.11 by root, Tue Feb 8 10:43:44 2005 UTC vs.
Revision 1.29 by root, Sat Sep 24 01:25:17 2005 UTC