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

Comparing CV/CV.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:50:39 2005 UTC vs.
Revision 1.63 by root, Sun Nov 28 23:26:51 2021 UTC

…		…
2	#include "perl.h"	2	#include "perl.h"
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	#include <math.h>
		8
		9	#include <magic.h>
7		10
8	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <jerror.h>
		13
9	#include <glib.h>	14	#include <glib.h>
10	#include <gtk/gtk.h>	15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
11	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
12		18
13	#include <gperl.h>	19	#include <gperl.h>
14	#include <gtk2perl.h>	20	#include <gtk2perl.h>
15		21
		22	#include <assert.h>
		23
		24	#if WEBP
		25	#include <webp/demux.h>
		26	#include <webp/decode.h>
		27	#endif
		28
		29	#if JXL
		30	#include <jxl/decode.h>
		31	#include "jxl/thread_parallel_runner.h"
		32	#endif
		33
		34	#include "perlmulticore.h"
		35
16	#define IW 80 /* MUST match Schnauer.pm! */	36	#define IW 80 /* MUST match Schnauzer.pm! */
17	#define IH 60 /* MUST match Schnauer.pm! */	37	#define IH 60 /* MUST match Schnauzer.pm! */
18
19	#define RAND (seed = (seed + 7141) * 54773 % 134456)
20		38
21	#define LINELENGTH 240	39	#define LINELENGTH 240
22		40
23	#define ELLIPSIS "\xe2\x80\xa6"	41	#define ELLIPSIS "\xe2\x80\xa6"
		42
		43	typedef char *octet_string;
		44
		45	static magic_t magic_cookie[2]; /* !mime, mime */
24		46
25	struct jpg_err_mgr	47	struct jpg_err_mgr
26	{	48	{
27	struct jpeg_error_mgr err;	49	struct jpeg_error_mgr err;
28	jmp_buf setjmp_buffer;	50	jmp_buf setjmp_buffer;
29	};	51	};
30		52
31	static void	53	static void
32	cv_error_exit (j_common_ptr cinfo)	54	cv_error_exit (j_common_ptr cinfo)
33	{	55	{
		56	cinfo->err->output_message (cinfo);
34	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	57	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35	}	58	}
36		59
37	static void	60	static void
38	cv_error_output (j_common_ptr cinfo)	61	cv_error_output (j_common_ptr cinfo)
39	{	62	{
		63	char msg[JMSG_LENGTH_MAX];
		64
		65	cinfo->err->format_message (cinfo, msg);
		66
		67	fprintf (stderr, "JPEG decoding error: %s\n", msg);
40	return;	68	return;
41	}	69	}
42		70
43	static void	71	static void
44	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,	72	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
…		…
65		93
66	*h &= 255;	94	*h &= 255;
67	}	95	}
68	}	96	}
69		97
		98	struct feature {
		99	float v1, v2, v3; // mean, square, cube
		100	int n;
		101	};
		102
		103	static void
		104	feature_init (struct feature *f)
		105	{
		106	f->v1 = 0.;
		107	f->v2 = 0.;
		108	f->v3 = 0.;
		109	f->n = 0;
		110	}
		111
		112	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		113	// elmex ist schuld.
		114	static void
		115	feature_update_pass_1 (struct feature *f, unsigned int v)
		116	{
		117	f->v1 += v;
		118	f->n += 1;
		119	}
		120
		121	static void
		122	feature_finish_pass_1 (struct feature *f)
		123	{
		124	if (f->n < 1)
		125	return;
		126
		127	f->v1 /= f->n;
		128	}
		129
		130	static void
		131	feature_update_pass_2 (struct feature *f, unsigned int v)
		132	{
		133	float d = v - f->v1;
		134
		135	f->v2 += d * d;
		136	f->v3 += d * d * d;
		137	}
		138
		139	static void
		140	feature_finish_pass_2 (struct feature *f)
		141	{
		142	if (f->n < 1)
		143	return;
		144
		145	f->v2 /= f->n;
		146	f->v3 /= f->n;
		147
		148	f->v1 /= 255.;
		149	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		150	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		151	}
		152
70	static guint32 a85_val;	153	static guint32 a85_val;
71	static guint a85_cnt;	154	static guint a85_cnt;
72	static guchar a85_buf[LINELENGTH], *a85_ptr;	155	static guchar a85_buf[LINELENGTH], *a85_ptr;
73		156
74	static void	157	static void
…		…
86	if (!--a85_cnt)	169	if (!--a85_cnt)
87	{	170	{
88	a85_cnt = 4;	171	a85_cnt = 4;
89	if (a85_val)	172	if (a85_val)
90	{	173	{
91	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	175	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	176	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	177	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95	a85_ptr[0] = (a85_val ) + 33;	178	a85_ptr[0] = (a85_val ) + 33;
96		179
97	a85_ptr += 5;	180	a85_ptr += 5;
98	}	181	}
…		…
121		204
122	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	205	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
123	}	206	}
124		207
125	/////////////////////////////////////////////////////////////////////////////	208	/////////////////////////////////////////////////////////////////////////////
		209	// memory source for libjpeg
		210
		211	static void cv_ms_init (j_decompress_ptr cinfo)
		212	{
		213	}
		214
		215	static void cv_ms_term (j_decompress_ptr cinfo)
		216	{
		217	}
		218
		219	static boolean cv_ms_fill (j_decompress_ptr cinfo)
		220	{
		221	// unexpected EOF, warn and generate fake EOI marker
		222
		223	WARNMS (cinfo, JWRN_JPEG_EOF);
		224
		225	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		226
		227	static const JOCTET eoi[] = { 0xFF, JPEG_EOI };
		228
		229	src->next_input_byte = eoi;
		230	src->bytes_in_buffer = sizeof (eoi);
		231
		232	return TRUE;
		233	}
		234
		235	static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
		236	{
		237	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		238
		239	src->next_input_byte += num_bytes;
		240	src->bytes_in_buffer -= num_bytes;
		241	}
		242
		243	static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
		244	{
		245	struct jpeg_source_mgr *src;
		246
		247	if (!cinfo->src)
		248	cinfo->src = (struct jpeg_source_mgr *)
		249	(*cinfo->mem->alloc_small) (
		250	(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
		251	);
		252
		253	src = (struct jpeg_source_mgr *)cinfo->src;
		254	src->init_source = cv_ms_init;
		255	src->fill_input_buffer = cv_ms_fill;
		256	src->skip_input_data = cv_ms_skip;
		257	src->resync_to_restart = jpeg_resync_to_restart;
		258	src->term_source = cv_ms_term;
		259	src->next_input_byte = (JOCTET *)buf;
		260	src->bytes_in_buffer = buflen;
		261	}
		262
		263	/////////////////////////////////////////////////////////////////////////////
		264
		265	/* great, the jpeg-xl reference implementaton requires us to parse bmff files */
		266
		267	struct bmff_box
		268	{
		269	char type[4];
		270	const uint8_t *ptr;
		271	size_t size;
		272	};
		273
		274	static int
		275	bmff_parse_box (struct bmff_box box, const uint8_t next_in, size_t avail_in)
		276	{
		277	if (*avail_in < 8)
		278	return 0;
		279
		280	box->size = ((*next_in)[0] << 24)
		281	\| ((*next_in)[1] << 16)
		282	\| ((*next_in)[2] << 8)
		283	\| ((*next_in)[3] );
		284
		285	if (box->size < 8)
		286	return 0;
		287
		288	if (*avail_in < box->size)
		289	return 0;
		290
		291	memcpy (box->type, *next_in + 4, 4);
		292	box->ptr = *next_in + 8;
		293
		294	*next_in += box->size;
		295	*avail_in -= box->size;
		296
		297	box->size -= 8;
		298
		299	return 1;
		300	}
		301
		302	/////////////////////////////////////////////////////////////////////////////
126		303
127	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	304	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128		305
129	PROTOTYPES: ENABLE	306	PROTOTYPES: ENABLE
130		307
		308	# calculate the common prefix length of two strings
		309	# missing function in perl. really :)
		310	int
		311	common_prefix_length (a, b)
		312	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		313	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		314	CODE:
		315	RETVAL = 0;
		316
		317	while (a == b && *a)
		318	{
		319	RETVAL += (*a & 0xc0) != 0x80;
		320	a++, b++;
		321	}
		322
		323	OUTPUT:
		324	RETVAL
		325
		326	const char *
		327	magic (SV *path_or_data)
		328	ALIAS:
		329	magic = 0
		330	magic_mime = 1
		331	magic_buffer = 2
		332	magic_buffer_mime = 3
		333	CODE:
		334	{
		335	STRLEN len;
		336	char *data = SvPVbyte (path_or_data, len);
		337
		338	if (!magic_cookie[0])
		339	{
		340	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		341	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		342	magic_load (magic_cookie[0], 0);
		343	magic_load (magic_cookie[1], 0);
		344	}
		345
		346	perlinterp_release ();
		347
		348	RETVAL = ix & 2
		349	? magic_buffer (magic_cookie[ix & 1], data, len)
		350	: magic_file (magic_cookie[ix & 1], data);
		351
		352	perlinterp_acquire ();
		353	}
		354	OUTPUT:
		355	RETVAL
		356
131	# missing in Gtk2 perl module	357	# missing/broken in Gtk2 perl module
		358
		359	void
		360	gdk_window_clear_hints (GdkWindow *window)
		361	CODE:
		362	gdk_window_set_geometry_hints (window, 0, 0);
132		363
133	gboolean	364	gboolean
134	gdk_net_wm_supports (GdkAtom property)	365	gdk_net_wm_supports (GdkAtom property)
135	CODE:	366	CODE:
136	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)	367	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
…		…
140	#endif	371	#endif
141	OUTPUT:	372	OUTPUT:
142	RETVAL	373	RETVAL
143		374
144	GdkPixbuf_noinc *	375	GdkPixbuf_noinc *
145	transpose (GdkPixbuf *pb)	376	dealpha_expose (GdkPixbuf *pb)
146	CODE:	377	CODE:
		378	perlinterp_release ();
147	{	379	{
148	int w = gdk_pixbuf_get_width (pb);	380	int w = gdk_pixbuf_get_width (pb);
149	int h = gdk_pixbuf_get_height (pb);	381	int h = gdk_pixbuf_get_height (pb);
150	int bpp = gdk_pixbuf_get_n_channels (pb);	382	int bpp = gdk_pixbuf_get_n_channels (pb);
151	int x, y, i;	383	int x, y, i;
152	guchar src = gdk_pixbuf_get_pixels (pb), dst;	384	guchar src = gdk_pixbuf_get_pixels (pb), dst;
153	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	385	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
154		386
155	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	387	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
156		388
157	dst = gdk_pixbuf_get_pixels (RETVAL);	389	dst = gdk_pixbuf_get_pixels (RETVAL);
158	dstr = gdk_pixbuf_get_rowstride (RETVAL);	390	dstr = gdk_pixbuf_get_rowstride (RETVAL);
159		391
160	for (y = 0; y < h; y++)
161	for (x = 0; x < w; x++)	392	for (x = 0; x < w; x++)
		393	for (y = 0; y < h; y++)
162	for (i = 0; i < bpp; i++)	394	for (i = 0; i < 3; i++)
163	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	395	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
164	}	396	}
		397	perlinterp_acquire ();
165	OUTPUT:	398	OUTPUT:
166	RETVAL	399	RETVAL
167		400
168	GdkPixbuf_noinc *	401	GdkPixbuf_noinc *
169	flop (GdkPixbuf *pb)	402	rotate (GdkPixbuf *pb, int angle)
170	CODE:	403	CODE:
171	{	404	perlinterp_release ();
172	int w = gdk_pixbuf_get_width (pb);	405	if (angle < 0)
173	int h = gdk_pixbuf_get_height (pb);	406	angle += 360;
174	int bpp = gdk_pixbuf_get_n_channels (pb);	407	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
175	int x, y, i;	408	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
176	guchar src = gdk_pixbuf_get_pixels (pb), dst;	409	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
177	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	410	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
178		411	: angle);
179	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	412	perlinterp_acquire ();
180
181	dst = gdk_pixbuf_get_pixels (RETVAL);
182	dstr = gdk_pixbuf_get_rowstride (RETVAL);
183
184	for (y = 0; y < h; y++)
185	for (x = 0; x < w; x++)
186	for (i = 0; i < bpp; i++)
187	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
188	}
189	OUTPUT:	413	OUTPUT:
190	RETVAL	414	RETVAL
191		415
		416	const char *
		417	filetype (SV *image_data)
		418	CODE:
		419	{
		420	STRLEN data_len;
		421	U8 *data = SvPVbyte (image_data, data_len);
		422	static const unsigned char jxl_header[] = {
		423	0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20, 0x0d, 0xa, 0x87, 0x0a
		424	};
		425
		426	if (data_len >= 20
		427	&& data[0] == 0xff
		428	&& data[1] == 0xd8
		429	&& data[2] == 0xff)
		430	RETVAL = "image/jpeg";
		431	else if (data_len >= 12
		432	&& data[ 0] == (U8)'R'
		433	&& data[ 1] == (U8)'I'
		434	&& data[ 2] == (U8)'F'
		435	&& data[ 3] == (U8)'F'
		436	&& data[ 8] == (U8)'W'
		437	&& data[ 9] == (U8)'E'
		438	&& data[10] == (U8)'B'
		439	&& data[11] == (U8)'P')
		440	RETVAL = "image/webp";
		441	else if (data_len >= 16
		442	&& data[ 0] == 0x89
		443	&& data[ 1] == (U8)'P'
		444	&& data[ 2] == (U8)'N'
		445	&& data[ 3] == (U8)'G'
		446	&& data[ 4] == 0x0d
		447	&& data[ 5] == 0x0a
		448	&& data[ 6] == 0x1a
		449	&& data[ 7] == 0x0a)
		450	RETVAL = "image/png";
		451	else if (data_len >= sizeof (jxl_header) && memcmp (data, jxl_header, sizeof (jxl_header)) == 0)
		452	RETVAL = "image/jxl"; // todo: might want to use JxlSignatureCheck
		453	else if (data_len >= 2
		454	&& data[0] == 0xff
		455	&& data[1] == 0x0a)
		456	RETVAL = "image/jxl";
		457	else if (data_len >= 13
		458	&& data[0] == 'G'
		459	&& data[1] == 'I'
		460	&& data[2] == 'F'
		461	&& data[3] == '8'
		462	//&& (data[4] == '7' \|\| data[4] == '9')
		463	&& data[5] == 'a')
		464	{
		465	RETVAL = "image/gif";
		466
		467	// now see if its animated - we require the netscape application header for this
		468	int ofs = 13;
		469
		470	if (data[10] & 0x80)
		471	ofs += (1 << ((data[10] & 7) + 1)) * 3;
		472
		473	if (data_len >= ofs + 2 + 1 + 11)
		474	{
		475
		476	// skip a graphic control extension block. we assume
		477	// there is at most one such block - while the NAB
		478	// has to come firstz, some files do not obey this
		479	if (data[ofs] == 0x21 && data[ofs + 1] == 0xf9)
		480	ofs += 3 + data[ofs + 2] + 1;
		481
		482	if (data_len >= ofs + 2 + 1 + 11)
		483	if (!memcmp (data + ofs, "\x21\xff\x0bNETSCAPE2.0", sizeof ("\x21\xff\x0bNETSCAPE2.0") - 1))
		484	RETVAL = "video/gif";
		485	}
		486	}
		487
		488	else
		489	XSRETURN_UNDEF;
		490	}
		491	OUTPUT:
		492	RETVAL
		493
192	GdkPixbuf_noinc *	494	GdkPixbuf_noinc *
193	load_jpeg (SV *path, int thumbnail=0)	495	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		496	CODE:
		497	{
		498	#if WEBP
		499	STRLEN data_size;
		500	int alpha;
		501	WebPData data;
		502	WebPDemuxer *demux;
		503	WebPIterator iter;
		504	WebPDecoderConfig config;
		505	int inw, inh;
		506
		507	data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
		508	data.size = data_size;
		509
		510	perlinterp_release ();
		511
		512	RETVAL = 0;
		513
		514	if (!(demux = WebPDemux (&data)))
		515	goto err_demux;
		516
		517	if (!WebPDemuxGetFrame (demux, 1, &iter))
		518	goto err_iter;
		519
		520	if (!WebPInitDecoderConfig (&config))
		521	goto err_iter;
		522
		523	config.options.use_threads = 1;
		524
		525	if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
		526	goto err_iter;
		527
		528	inw = config.input.width;
		529	inh = config.input.height;
		530
		531	if (thumbnail)
		532	{
		533	if (inw * ih > inh * iw)
		534	ih = (iw * inh + inw - 1) / inw;
		535	else
		536	iw = (ih * inw + inh - 1) / inh;
		537
		538	config.options.bypass_filtering = 1;
		539	config.options.no_fancy_upsampling = 1;
		540
		541	config.options.use_scaling = 1;
		542	config.options.scaled_width = iw;
		543	config.options.scaled_height = ih;
		544	}
		545	else
		546	{
		547	iw = inw;
		548	ih = inh;
		549	}
		550
		551	alpha = !!config.input.has_alpha;
		552
		553	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
		554	if (!RETVAL)
		555	goto err_iter;
		556
		557	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		558	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		559	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		560	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		561	config.output.is_external_memory = 1;
		562
		563	if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
		564	{
		565	g_object_unref (RETVAL);
		566	RETVAL = 0;
		567	goto err_iter;
		568	}
		569
		570	err_iter:
		571	WebPDemuxReleaseIterator (&iter);
		572	err_demux:
		573	WebPDemuxDelete (demux);
		574
		575	perlinterp_acquire ();
		576	#else
		577	croak ("load_webp: webp not enabled at compile time");
		578	#endif
		579	}
		580	OUTPUT:
		581	RETVAL
		582
		583	GdkPixbuf_noinc *
		584	decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		585	CODE:
		586	{
		587	#if JXL
		588	JxlDecoder *dec;
		589	JxlBasicInfo info;
		590	const uint8_t next_in = (uint8_t )SvPVbyte_nolen (image_data);
		591	size_t avail_in = SvCUR (image_data);
		592	const char *error = 0;
		593	JxlDecoderStatus status;
		594	void *runner = 0;
		595	struct bmff_box box;
		596
		597	RETVAL = 0;
		598
		599	perlinterp_release ();
		600
		601	dec = JxlDecoderCreate (0);
		602
		603	error = "JxlDecoderCreate failed";
		604	if (!dec)
		605	goto done;
		606
		607	runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ());
		608
		609	status = JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner);
		610	error = "JxlDecoderSetParallelRunner failed";
		611	if (status != JXL_DEC_SUCCESS)
		612	goto done;
		613
		614	error = "JxlDecoderSubscribeEvents failed";
		615	status = JxlDecoderSubscribeEvents (dec, JXL_DEC_BASIC_INFO \| JXL_DEC_FULL_IMAGE);
		616	if (status != JXL_DEC_SUCCESS)
		617	goto done;
		618
		619	status = JxlDecoderSetInput (dec, next_in, avail_in);
		620	error = "JxlDecoderSetInput failed";
		621	if (status != JXL_DEC_SUCCESS)
		622	goto done;
		623
		624	for (;;)
		625	{
		626	status = JxlDecoderProcessInput (dec);
		627
		628	switch (status)
		629	{
		630	case JXL_DEC_FULL_IMAGE:
		631	error = 0;
		632	goto done;
		633
		634	case JXL_DEC_ERROR:
		635	error = "JxlDecoderProcessInput failed";
		636	goto done;
		637
		638	case JXL_DEC_NEED_MORE_INPUT:
		639	error = "incomplete file";
		640	goto done;
		641
		642	case JXL_DEC_SUCCESS:
		643	error = "incomplete decode";
		644	goto done;
		645
		646	case JXL_DEC_BASIC_INFO:
		647	{
		648	status = JxlDecoderGetBasicInfo (dec, &info);
		649	error = "JxlDecoderGetBasicInfo failed";
		650	if (status != JXL_DEC_SUCCESS)
		651	goto done;
		652
		653	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize);
		654	error = "unable to allocate pixbuf";
		655	if (!RETVAL)
		656	goto done;
		657
		658	JxlPixelFormat format = {
		659	info.alpha_bits ? 4 : 3,
		660	JXL_TYPE_UINT8,
		661	JXL_NATIVE_ENDIAN,
		662	gdk_pixbuf_get_rowstride (RETVAL)
		663	};
		664
		665	// cannot use gdk_pixbuf_get_byte_length because that does
		666	// not return the size of the buffer, but the size of the buffer without
		667	// the last padding bytes. the internal buffer is rowstride * ysize,
		668	// and this is what the jxl decoder needs. none of this is documented
		669	// in either library, of course.
		670
		671	status = JxlDecoderSetImageOutBuffer (
		672	dec,
		673	&format,
		674	gdk_pixbuf_get_pixels (RETVAL),
		675	gdk_pixbuf_get_rowstride (RETVAL) * info.ysize
		676	);
		677	error = "JxlDecoderSetImageOutBuffer failed";
		678	if (status != JXL_DEC_SUCCESS)
		679	goto done;
		680	}
		681	break;
		682
		683	default:
		684	error = "unexpected event";
		685	goto done;
		686	}
		687	}
		688
		689	done:
		690	if (dec)
		691	JxlDecoderDestroy (dec);
		692
		693	if (runner)
		694	JxlThreadParallelRunnerDestroy (runner);
		695
		696	perlinterp_acquire ();
		697
		698	if (error)
		699	{
		700	if (RETVAL)
		701	g_object_unref (RETVAL);
		702
		703	croak ("load_jxl: %s (status %d)", error, status);
		704	}
		705	#else
		706	croak ("load_jxl: jpeg-xl not enabled at compile time");
		707	#endif
		708	}
		709	OUTPUT:
		710	RETVAL
		711
		712	GdkPixbuf_noinc *
		713	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
194	CODE:	714	CODE:
195	{	715	{
196	struct jpeg_decompress_struct cinfo;	716	struct jpeg_decompress_struct cinfo;
197	struct jpg_err_mgr jerr;	717	struct jpg_err_mgr jerr;
198	guchar *data;
199	int rs;	718	int rs;
200	FILE *fp;
201	volatile GdkPixbuf *pb = 0;	719	volatile GdkPixbuf *pb = 0;
202	gchar *filename;	720	STRLEN data_len;
		721	guchar *data = SvPVbyte (image_data, data_len);
203		722
204	RETVAL = 0;	723	RETVAL = 0;
205		724
206	filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);	725	perlinterp_release ();
207	fp = fopen (filename, "rb");
208	g_free (filename);
209
210	if (!fp)
211	XSRETURN_UNDEF;
212		726
213	cinfo.err = jpeg_std_error (&jerr.err);	727	cinfo.err = jpeg_std_error (&jerr.err);
214		728
215	jerr.err.error_exit = cv_error_exit;	729	jerr.err.error_exit = cv_error_exit;
216	jerr.err.output_message = cv_error_output;	730	jerr.err.output_message = cv_error_output;
217		731
218	if ((rs = setjmp (jerr.setjmp_buffer)))	732	if ((rs = setjmp (jerr.setjmp_buffer)))
219	{	733	{
220	fclose (fp);
221	jpeg_destroy_decompress (&cinfo);	734	jpeg_destroy_decompress (&cinfo);
222		735
223	if (pb)	736	if (pb)
224	g_object_unref ((gpointer)pb);	737	g_object_unref ((gpointer)pb);
225		738
		739	perlinterp_acquire ();
226	XSRETURN_UNDEF;	740	XSRETURN_UNDEF;
227	}	741	}
228		742
		743	if (!data_len)
		744	longjmp (jerr.setjmp_buffer, 4);
		745
229	jpeg_create_decompress (&cinfo);	746	jpeg_create_decompress (&cinfo);
		747	cv_jpeg_mem_src (&cinfo, data, data_len);
230		748
231	jpeg_stdio_src (&cinfo, fp);
232	jpeg_read_header (&cinfo, TRUE);	749	jpeg_read_header (&cinfo, TRUE);
233		750
234	cinfo.dct_method = JDCT_DEFAULT;	751	cinfo.dct_method = JDCT_DEFAULT;
235	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */	752	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
236	cinfo.do_block_smoothing = FALSE;	753	cinfo.do_block_smoothing = FALSE;
…		…
246	{	763	{
247	cinfo.dct_method = JDCT_FASTEST;	764	cinfo.dct_method = JDCT_FASTEST;
248	cinfo.do_fancy_upsampling = FALSE;	765	cinfo.do_fancy_upsampling = FALSE;
249		766
250	while (cinfo.scale_denom < 8	767	while (cinfo.scale_denom < 8
251	&& cinfo.output_width >= IW*4	768	&& cinfo.output_width >= iw*4
252	&& cinfo.output_height >= IH*4)	769	&& cinfo.output_height >= ih*4)
253	{	770	{
254	cinfo.scale_denom <<= 1;	771	cinfo.scale_denom <<= 1;
255	jpeg_calc_output_dimensions (&cinfo);	772	jpeg_calc_output_dimensions (&cinfo);
256	}	773	}
257	}	774	}
258		775
		776	if (cinfo.output_components != 3)
		777	longjmp (jerr.setjmp_buffer, 3);
		778
		779	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		780	{
		781	cinfo.out_color_space = JCS_CMYK;
		782	cinfo.output_components = 4;
		783	}
		784
259	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	785	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
260	if (!RETVAL)	786	if (!RETVAL)
261	longjmp (jerr.setjmp_buffer, 2);	787	longjmp (jerr.setjmp_buffer, 2);
262		788
263	data = gdk_pixbuf_get_pixels (RETVAL);	789	data = gdk_pixbuf_get_pixels (RETVAL);
264	rs = gdk_pixbuf_get_rowstride (RETVAL);	790	rs = gdk_pixbuf_get_rowstride (RETVAL);
265
266	if (cinfo.output_components != 3)
267	longjmp (jerr.setjmp_buffer, 3);
268		791
269	jpeg_start_decompress (&cinfo);	792	jpeg_start_decompress (&cinfo);
270		793
271	while (cinfo.output_scanline < cinfo.output_height)	794	while (cinfo.output_scanline < cinfo.output_height)
272	{	795	{
…		…
279	rp [3] = (guchar *)rp [2] + rs;	802	rp [3] = (guchar *)rp [2] + rs;
280		803
281	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	804	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
282	}	805	}
283		806
		807	if (cinfo.out_color_space == JCS_CMYK)
		808	{
		809	guchar end = data + cinfo.output_height rs;
		810
		811	while (data < end)
		812	{
		813	U32 c = data [0];
		814	U32 m = data [1];
		815	U32 y = data [2];
		816	U32 k = data [3];
		817
		818	if (0)
		819	if (cinfo.Adobe_transform == 2)
		820	{
		821	c ^= 0xff;
		822	m ^= 0xff;
		823	y ^= 0xff;
		824	k ^= 0xff;
		825	}
		826
		827	data [0] = (c * k + 0x80) / 0xff;
		828	data [1] = (m * k + 0x80) / 0xff;
		829	data [2] = (y * k + 0x80) / 0xff;
		830	data [3] = 0xff;
		831
		832	data += 4;
		833	}
		834	}
		835
284	jpeg_finish_decompress (&cinfo);	836	jpeg_finish_decompress (&cinfo);
285	fclose (fp);
286	jpeg_destroy_decompress (&cinfo);	837	jpeg_destroy_decompress (&cinfo);
		838	perlinterp_acquire ();
287	}	839	}
288	OUTPUT:	840	OUTPUT:
289	RETVAL	841	RETVAL
290		842
		843	void
		844	compare (GdkPixbuf a, GdkPixbuf b)
		845	PPCODE:
		846	perlinterp_release ();
		847	{
		848	int w = gdk_pixbuf_get_width (a);
		849	int h = gdk_pixbuf_get_height (a);
		850
		851	int sa = gdk_pixbuf_get_rowstride (a);
		852	int sb = gdk_pixbuf_get_rowstride (b);
		853
		854	guchar *pa = gdk_pixbuf_get_pixels (a);
		855	guchar *pb = gdk_pixbuf_get_pixels (b);
		856
		857	int x, y;
		858
		859	assert (w == gdk_pixbuf_get_width (b));
		860	assert (h == gdk_pixbuf_get_height (b));
		861
		862	assert (gdk_pixbuf_get_n_channels (a) == 3);
		863	assert (gdk_pixbuf_get_n_channels (b) == 3);
		864
		865	double diff = 0.;
		866	int peak = 0;
		867
		868	if (w && h)
		869	for (y = 0; y < h; y++)
		870	{
		871	guchar pa_ = pa + y sa;
		872	guchar pb_ = pb + y sb;
		873
		874	for (x = 0; x < w; x++)
		875	{
		876	int d;
		877
		878	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		879	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		880	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		881	}
		882	}
		883
		884	perlinterp_acquire ();
		885
		886	EXTEND (SP, 2);
		887	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		888	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		889	}
		890
291	#############################################################################	891	#############################################################################
292		892
293	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	893	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		894
		895	# currently only works for filenames (octet strings)
294		896
295	SV *	897	SV *
296	foldcase (SV *pathsv)	898	foldcase (SV *pathsv)
297	PROTOTYPE: $	899	PROTOTYPE: $
298	CODE:	900	CODE:
299	{	901	{
300	STRLEN plen;	902	STRLEN plen;
301	U8 *path = SvPVutf8 (pathsv, plen);	903	U8 path = (U8 )SvPV (pathsv, plen);
302	U8 *pend = path + plen;	904	U8 *pend = path + plen;
303	U8 dst [plen * 6 * 3], *dstp = dst;	905	U8 dst [plen * 8 * 3], *dstp = dst;
304		906
305	while (path < pend)	907	while (path < pend)
306	{	908	{
307	U8 ch = *path;	909	U8 ch = *path;
308		910
309	if (ch >= 'a' && ch <= 'z')	911	if (ch >= 'a' && ch <= 'z')
310	dstp++ = path++;	912	dstp++ = path++;
		913	else if (ch >= 'A' && ch <= 'Z')
		914	dstp++ = path++ + ('a' - 'A');
311	else if (ch >= '0' && ch <= '9')	915	else if (ch >= '0' && ch <= '9')
312	{	916	{
		917	/* version sort, up to 8 digits */
313	STRLEN el, nl = 0;	918	STRLEN el, nl = 0;
314	while (path >= '0' && path <= '9' && path < pend)	919	while (path >= '0' && path <= '9' && path < pend)
315	path++, nl++;	920	path++, nl++;
316		921
317	for (el = nl; el < 6; el++)	922	for (el = nl; el < 8; el++)
318	*dstp++ = '0';	923	*dstp++ = '0';
319		924
320	memcpy (dstp, path - nl, nl);	925	memcpy (dstp, path - nl, nl);
321	dstp += nl;	926	dstp += nl;
322	}	927	}
		928	else
		929	dstp++ = path++;
		930	#if 0
323	else	931	else
324	{	932	{
325	STRLEN cl;	933	STRLEN cl;
326	to_utf8_fold (path, dstp, &cl);	934	to_utf8_fold (path, dstp, &cl);
327	dstp += cl;	935	dstp += cl;
328	path += is_utf8_char (path);	936	path += is_utf8_char (path);
329	}	937	}
		938	#endif
330	}	939	}
331		940
332	RETVAL = newSVpvn (dst, dstp - dst);	941	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
333	}	942	}
334	OUTPUT:	943	OUTPUT:
335	RETVAL	944	RETVAL
336		945
337	GdkPixbuf_noinc *	946	GdkPixbuf_noinc *
338	p7_to_pb (int w, int h, guchar *src)	947	p7_to_pb (int w, int h, SV *src_sv)
339	PROTOTYPE: @	948	PROTOTYPE: @
340	CODE:	949	CODE:
341	{	950	{
342	int x, y;	951	int x, y;
343	guchar dst, d;	952	guchar dst, d;
344	int dstr;	953	int dstr;
		954	guchar src = (guchar )SvPVbyte_nolen (src_sv);
345		955
346	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	956	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
347	dst = gdk_pixbuf_get_pixels (RETVAL);	957	dst = gdk_pixbuf_get_pixels (RETVAL);
348	dstr = gdk_pixbuf_get_rowstride (RETVAL);	958	dstr = gdk_pixbuf_get_rowstride (RETVAL);
349		959
…		…
358	}	968	}
359	}	969	}
360	OUTPUT:	970	OUTPUT:
361	RETVAL	971	RETVAL
362		972
		973	#############################################################################
		974
		975	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		976
		977	void
		978	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		979	CODE:
		980	{
		981	int w = gdk_pixbuf_get_width (pb);
		982	int h = gdk_pixbuf_get_height (pb);
		983	int x, y, i;
		984	guchar *dst;
		985	int bpp = gdk_pixbuf_get_n_channels (pb);
		986	guchar *src = gdk_pixbuf_get_pixels (pb);
		987	int sstr = gdk_pixbuf_get_rowstride (pb);
		988
		989	a85_init ();
		990
		991	for (y = 0; y < h; y++)
		992	for (x = 0; x < w; x++)
		993	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		994	a85_push (fp, src [x * bpp + y * sstr + i]);
		995
		996	a85_finish (fp);
		997	}
		998
		999	void
		1000	dump_binary (PerlIO fp, GdkPixbuf pb)
		1001	CODE:
		1002	{
		1003	int w = gdk_pixbuf_get_width (pb);
		1004	int h = gdk_pixbuf_get_height (pb);
		1005	int x, y, i;
		1006	guchar *dst;
		1007	int bpp = gdk_pixbuf_get_n_channels (pb);
		1008	guchar *src = gdk_pixbuf_get_pixels (pb);
		1009	int sstr = gdk_pixbuf_get_rowstride (pb);
		1010
		1011	for (y = 0; y < h; y++)
		1012	for (x = 0; x < w; x++)
		1013	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		1014	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		1015	}
		1016
		1017	#############################################################################
		1018
		1019	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		1020
363	SV *	1021	SV *
364	pb_to_p7 (GdkPixbuf *pb)	1022	pb_to_hv84 (GdkPixbuf *pb)
365	CODE:	1023	CODE:
366	{	1024	{
367	int w = gdk_pixbuf_get_width (pb);	1025	int w = gdk_pixbuf_get_width (pb);
368	int h = gdk_pixbuf_get_height (pb);	1026	int h = gdk_pixbuf_get_height (pb);
369	int x, y;	1027	int x, y;
370	guchar *dst;	1028	guchar *dst;
371	int bpp = gdk_pixbuf_get_n_channels (pb);	1029	int bpp = gdk_pixbuf_get_n_channels (pb);
372	guchar *src = gdk_pixbuf_get_pixels (pb);	1030	guchar *src = gdk_pixbuf_get_pixels (pb);
373	int sstr = gdk_pixbuf_get_rowstride (pb);	1031	int sstr = gdk_pixbuf_get_rowstride (pb);
374	int Er[IW], Eg[IW], Eb[IW];
375	int seed = 77;
376
377	RETVAL = newSV (w * h);
378	SvPOK_only (RETVAL);
379	SvCUR_set (RETVAL, w * h);
380
381	dst = SvPVX (RETVAL);
382
383	memset (Er, 0, sizeof (int) * IW);
384	memset (Eg, 0, sizeof (int) * IW);
385	memset (Eb, 0, sizeof (int) * IW);
386
387	/* some primitive error distribution + random dithering */
388
389	for (y = 0; y < h; y++)
390	{
391	int er = 0, eg = 0, eb = 0;
392
393	for (x = 0; x < w; x++)
394	{
395	int r, g, b;
396	guchar p = src + x bpp + y * sstr;
397
398	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
399	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
400	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
401
402	r = r > 7 ? 7 : r < 0 ? 0 : r;
403	g = g > 7 ? 7 : g < 0 ? 0 : g;
404	b = b > 3 ? 3 : b < 0 ? 0 : b;
405
406	er += p[0] - (r * 255 + 4) / 7;
407	eg += p[1] - (g * 255 + 4) / 7;
408	eb += p[2] - (b * 255 + 2) / 3;
409
410	Er[x] = er >> 1; er -= (er + 1) >> 1;
411	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
412	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
413
414	*dst++ = r << 5 \| g << 2 \| b;
415	}
416	}
417	}
418	OUTPUT:
419	RETVAL
420
421	#############################################################################
422
423	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
424
425	void
426	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
427	CODE:
428	{
429	int w = gdk_pixbuf_get_width (pb);
430	int h = gdk_pixbuf_get_height (pb);
431	int x, y, i;
432	guchar *dst;
433	int bpp = gdk_pixbuf_get_n_channels (pb);
434	guchar *src = gdk_pixbuf_get_pixels (pb);
435	int sstr = gdk_pixbuf_get_rowstride (pb);
436
437	a85_init ();
438
439	for (y = 0; y < h; y++)
440	for (x = 0; x < w; x++)
441	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
442	a85_push (fp, src [x * bpp + y * sstr + i]);
443
444	a85_finish (fp);
445	}
446
447	void
448	dump_binary (PerlIO fp, GdkPixbuf pb)
449	CODE:
450	{
451	int w = gdk_pixbuf_get_width (pb);
452	int h = gdk_pixbuf_get_height (pb);
453	int x, y, i;
454	guchar *dst;
455	int bpp = gdk_pixbuf_get_n_channels (pb);
456	guchar *src = gdk_pixbuf_get_pixels (pb);
457	int sstr = gdk_pixbuf_get_rowstride (pb);
458
459	for (y = 0; y < h; y++)
460	for (x = 0; x < w; x++)
461	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
462	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
463	}
464
465	#############################################################################
466
467	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
468
469	SV *
470	pb_to_hv84 (GdkPixbuf *pb)
471	CODE:
472	{
473	int w = gdk_pixbuf_get_width (pb);
474	int h = gdk_pixbuf_get_height (pb);
475	int x, y;
476	guchar *dst;
477	int bpp = gdk_pixbuf_get_n_channels (pb);
478	guchar *src = gdk_pixbuf_get_pixels (pb);
479	int sstr = gdk_pixbuf_get_rowstride (pb);
480		1032
481	RETVAL = newSV (6 * 8 * 12 / 8);	1033	RETVAL = newSV (6 * 8 * 12 / 8);
482	SvPOK_only (RETVAL);	1034	SvPOK_only (RETVAL);
483	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	1035	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
484		1036
485	dst = SvPVX (RETVAL);	1037	dst = (guchar *)SvPVX (RETVAL);
486		1038
487	/* some primitive error distribution + random dithering */	1039	/* some primitive error distribution + random dithering */
488		1040
489	for (y = 0; y < h; y++)	1041	for (y = 0; y < h; y++)
490	{	1042	{
…		…
553	#############################################################################	1105	#############################################################################
554		1106
555	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster	1107	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
556		1108
557	SV *	1109	SV *
558	make_histograms (SV *ar)	1110	extract_features (SV *ar)
559	CODE:	1111	CODE:
560	{	1112	{
561	int i;	1113	int i;
562	AV av, result;	1114	AV av, result;
563		1115
564	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)	1116	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
565	croak ("Not an array ref as first argument to make_histogram");	1117	croak ("Not an array ref as first argument to extract_features");
566		1118
567	av = (AV *) SvRV (ar);	1119	av = (AV *) SvRV (ar);
568	result = newAV ();	1120	result = newAV ();
569		1121
570	for (i = 0; i <= av_len (av); ++i)	1122	for (i = 0; i <= av_len (av); ++i)
571	{	1123	{
572	const int HISTSIZE = 64;
573
574	int j;
575	SV sv = av_fetch (av, i, 1);	1124	SV sv = av_fetch (av, i, 1);
576	STRLEN len;
577	char *buf = SvPVbyte (sv, len);
578
579	int tmphist[HISTSIZE];
580	float *hist;
581
582	SV histsv = newSV (HISTSIZE sizeof (float) + 1);	1125	SV histsv = newSV (9 sizeof (float) + 1);
		1126
583	SvPOK_on (histsv);	1127	SvPOK_on (histsv);
584	SvCUR_set (histsv, HISTSIZE * sizeof (float));	1128	SvCUR_set (histsv, 9 * sizeof (float));
585	hist = (float *)SvPVX (histsv);	1129	float hist = (float )SvPVX (histsv);
586		1130
587	Zero (tmphist, sizeof (tmphist), char);	1131	struct feature f_h, f_s, f_v;
		1132	feature_init (&f_h);
		1133	feature_init (&f_s);
		1134	feature_init (&f_v);
588		1135
589	for (j = len; j--; )
590	{
591	unsigned int idx
592	= ((*buf & 0xc0) >> 2)
593	\| ((*buf & 0x18) >> 1)
594	\| (*buf & 0x03);
595
596	++tmphist[idx];
597	++buf;
598	}
599		1136	{
600	for (j = 0; j < HISTSIZE; ++j)	1137	STRLEN len;
601	hist[j] = (float)tmphist[j] / (len + 1e-30);	1138	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		1139	while (len >= 3)
		1140	{
		1141	unsigned int r, g, b, h, s, v;
		1142	r = buf++; g = buf++; b = *buf++;
		1143	rgb_to_hsv (r, g, b, &h, &s, &v);
		1144
		1145	feature_update_pass_1 (&f_h, h);
		1146	feature_update_pass_1 (&f_s, s);
		1147	feature_update_pass_1 (&f_v, v);
		1148
		1149	len -= 3;
		1150	}
		1151
		1152	feature_finish_pass_1 (&f_h);
		1153	feature_finish_pass_1 (&f_s);
		1154	feature_finish_pass_1 (&f_v);
		1155	}
		1156
		1157	{
		1158	STRLEN len;
		1159	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		1160	while (len >= 3)
		1161	{
		1162	unsigned int r, g, b, h, s, v;
		1163	r = buf++; g = buf++; b = *buf++;
		1164	rgb_to_hsv (r, g, b, &h, &s, &v);
		1165
		1166	feature_update_pass_2 (&f_h, h);
		1167	feature_update_pass_2 (&f_s, s);
		1168	feature_update_pass_2 (&f_v, v);
		1169
		1170	len -= 3;
		1171	}
		1172
		1173	feature_finish_pass_2 (&f_h);
		1174	feature_finish_pass_2 (&f_s);
		1175	feature_finish_pass_2 (&f_v);
		1176	}
		1177
		1178	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		1179	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		1180	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
602		1181
603	av_push (result, histsv);	1182	av_push (result, histsv);
604	}	1183	}
605		1184
606	RETVAL = newRV_noinc ((SV *)result);	1185	RETVAL = newRV_noinc ((SV *)result);
607	}	1186	}
608	OUTPUT:	1187	OUTPUT:
609	RETVAL	1188	RETVAL
610		1189
611

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Comparing CV/CV.xs (file contents): Revision 1.23 by root, Tue Aug 16 23:50:39 2005 UTC vs. Revision 1.63 by root, Sun Nov 28 23:26:51 2021 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:50:39 2005 UTC vs.
Revision 1.63 by root, Sun Nov 28 23:26:51 2021 UTC