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

Comparing CV/CV.xs (file contents):
Revision 1.40 by root, Sat Nov 25 15:00:51 2006 UTC vs.
Revision 1.63 by root, Sun Nov 28 23:26:51 2021 UTC

…		…
7	#include <math.h>	7	#include <math.h>
8		8
9	#include <magic.h>	9	#include <magic.h>
10		10
11	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <jerror.h>
		13
12	#include <glib.h>	14	#include <glib.h>
13	#include <gtk/gtk.h>	15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
14	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
15		18
16	#include <gperl.h>	19	#include <gperl.h>
17	#include <gtk2perl.h>	20	#include <gtk2perl.h>
18		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
19	#define IW 80 /* MUST match Schnauzer.pm! */	36	#define IW 80 /* MUST match Schnauzer.pm! */
20	#define IH 60 /* MUST match Schnauzer.pm! */	37	#define IH 60 /* MUST match Schnauzer.pm! */
21		38
22	#define RAND (seed = (seed + 7141) * 54773 % 134456)
23
24	#define LINELENGTH 240	39	#define LINELENGTH 240
25		40
26	#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 */
27		46
28	struct jpg_err_mgr	47	struct jpg_err_mgr
29	{	48	{
30	struct jpeg_error_mgr err;	49	struct jpeg_error_mgr err;
31	jmp_buf setjmp_buffer;	50	jmp_buf setjmp_buffer;
32	};	51	};
33		52
34	static void	53	static void
35	cv_error_exit (j_common_ptr cinfo)	54	cv_error_exit (j_common_ptr cinfo)
36	{	55	{
		56	cinfo->err->output_message (cinfo);
37	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	57	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
38	}	58	}
39		59
40	static void	60	static void
41	cv_error_output (j_common_ptr cinfo)	61	cv_error_output (j_common_ptr cinfo)
42	{	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);
43	return;	68	return;
44	}	69	}
45		70
46	static void	71	static void
47	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,
…		…
144	if (!--a85_cnt)	169	if (!--a85_cnt)
145	{	170	{
146	a85_cnt = 4;	171	a85_cnt = 4;
147	if (a85_val)	172	if (a85_val)
148	{	173	{
149	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
150	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	175	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
151	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	176	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
152	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	177	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
153	a85_ptr[0] = (a85_val ) + 33;	178	a85_ptr[0] = (a85_val ) + 33;
154		179
155	a85_ptr += 5;	180	a85_ptr += 5;
156	}	181	}
…		…
179		204
180	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	205	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
181	}	206	}
182		207
183	/////////////////////////////////////////////////////////////////////////////	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	/////////////////////////////////////////////////////////////////////////////
184		303
185	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	304	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
186		305
187	PROTOTYPES: ENABLE	306	PROTOTYPES: ENABLE
188		307
		308	# calculate the common prefix length of two strings
189	# missing function in perl. really :)	309	# missing function in perl. really :)
190	int	310	int
191	common_prefix_length (a, b)	311	common_prefix_length (a, b)
192	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);	312	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
193	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);	313	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
…		…
202		322
203	OUTPUT:	323	OUTPUT:
204	RETVAL	324	RETVAL
205		325
206	const char *	326	const char *
207	magic (const char *path)	327	magic (SV *path_or_data)
		328	ALIAS:
		329	magic = 0
		330	magic_mime = 1
		331	magic_buffer = 2
		332	magic_buffer_mime = 3
208	CODE:	333	CODE:
209	{	334	{
210	static magic_t cookie;	335	STRLEN len;
		336	char *data = SvPVbyte (path_or_data, len);
211		337
212	if (!cookie)	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);
213	{	344	}
214	cookie = magic_open (MAGIC_NONE);
215		345
216	if (cookie)	346	perlinterp_release ();
217	magic_load (cookie, 0);
218	else
219	XSRETURN_UNDEF;
220	}
221		347
222	RETVAL = magic_file (cookie, path);
223	}
224	OUTPUT:
225	RETVAL	348	RETVAL = ix & 2
		349	? magic_buffer (magic_cookie[ix & 1], data, len)
		350	: magic_file (magic_cookie[ix & 1], data);
226		351
227	const char *	352	perlinterp_acquire ();
228	magic_mime (const char *path)
229	CODE:
230	{
231	static magic_t cookie;
232
233	if (!cookie)
234	{
235	cookie = magic_open (MAGIC_MIME);
236
237	if (cookie)
238	magic_load (cookie, 0);
239	else
240	XSRETURN_UNDEF;
241	}
242
243	RETVAL = magic_file (cookie, path);
244	}	353	}
245	OUTPUT:	354	OUTPUT:
246	RETVAL	355	RETVAL
247		356
248	# missing/broken in Gtk2 perl module	357	# missing/broken in Gtk2 perl module
…		…
264	RETVAL	373	RETVAL
265		374
266	GdkPixbuf_noinc *	375	GdkPixbuf_noinc *
267	dealpha_expose (GdkPixbuf *pb)	376	dealpha_expose (GdkPixbuf *pb)
268	CODE:	377	CODE:
		378	perlinterp_release ();
269	{	379	{
270	int w = gdk_pixbuf_get_width (pb);	380	int w = gdk_pixbuf_get_width (pb);
271	int h = gdk_pixbuf_get_height (pb);	381	int h = gdk_pixbuf_get_height (pb);
272	int bpp = gdk_pixbuf_get_n_channels (pb);	382	int bpp = gdk_pixbuf_get_n_channels (pb);
273	int x, y, i;	383	int x, y, i;
…		…
282	for (x = 0; x < w; x++)	392	for (x = 0; x < w; x++)
283	for (y = 0; y < h; y++)	393	for (y = 0; y < h; y++)
284	for (i = 0; i < 3; i++)	394	for (i = 0; i < 3; i++)
285	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];	395	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
286	}	396	}
		397	perlinterp_acquire ();
287	OUTPUT:	398	OUTPUT:
288	RETVAL	399	RETVAL
289		400
290	GdkPixbuf_noinc *	401	GdkPixbuf_noinc *
291	rotate (GdkPixbuf *pb, int angle)	402	rotate (GdkPixbuf *pb, int angle)
292	CODE:	403	CODE:
		404	perlinterp_release ();
		405	if (angle < 0)
		406	angle += 360;
293	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE	407	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
294	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE	408	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
295	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN	409	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
296	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE	410	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
297	: angle);	411	: angle);
		412	perlinterp_acquire ();
298	OUTPUT:	413	OUTPUT:
299	RETVAL	414	RETVAL
300		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
301	GdkPixbuf_noinc *	494	GdkPixbuf_noinc *
302	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)
303	CODE:	714	CODE:
304	{	715	{
305	struct jpeg_decompress_struct cinfo;	716	struct jpeg_decompress_struct cinfo;
306	struct jpg_err_mgr jerr;	717	struct jpg_err_mgr jerr;
307	guchar *data;
308	int rs;	718	int rs;
309	FILE *fp;
310	volatile GdkPixbuf *pb = 0;	719	volatile GdkPixbuf *pb = 0;
		720	STRLEN data_len;
		721	guchar *data = SvPVbyte (image_data, data_len);
311		722
312	RETVAL = 0;	723	RETVAL = 0;
313		724
314	fp = fopen (SvPVbyte_nolen (path), "rb");	725	perlinterp_release ();
315
316	if (!fp)
317	XSRETURN_UNDEF;
318		726
319	cinfo.err = jpeg_std_error (&jerr.err);	727	cinfo.err = jpeg_std_error (&jerr.err);
320		728
321	jerr.err.error_exit = cv_error_exit;	729	jerr.err.error_exit = cv_error_exit;
322	jerr.err.output_message = cv_error_output;	730	jerr.err.output_message = cv_error_output;
323		731
324	if ((rs = setjmp (jerr.setjmp_buffer)))	732	if ((rs = setjmp (jerr.setjmp_buffer)))
325	{	733	{
326	fclose (fp);
327	jpeg_destroy_decompress (&cinfo);	734	jpeg_destroy_decompress (&cinfo);
328		735
329	if (pb)	736	if (pb)
330	g_object_unref ((gpointer)pb);	737	g_object_unref ((gpointer)pb);
331		738
		739	perlinterp_acquire ();
332	XSRETURN_UNDEF;	740	XSRETURN_UNDEF;
333	}	741	}
334		742
		743	if (!data_len)
		744	longjmp (jerr.setjmp_buffer, 4);
		745
335	jpeg_create_decompress (&cinfo);	746	jpeg_create_decompress (&cinfo);
		747	cv_jpeg_mem_src (&cinfo, data, data_len);
336		748
337	jpeg_stdio_src (&cinfo, fp);
338	jpeg_read_header (&cinfo, TRUE);	749	jpeg_read_header (&cinfo, TRUE);
339		750
340	cinfo.dct_method = JDCT_DEFAULT;	751	cinfo.dct_method = JDCT_DEFAULT;
341	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 */
342	cinfo.do_block_smoothing = FALSE;	753	cinfo.do_block_smoothing = FALSE;
…		…
352	{	763	{
353	cinfo.dct_method = JDCT_FASTEST;	764	cinfo.dct_method = JDCT_FASTEST;
354	cinfo.do_fancy_upsampling = FALSE;	765	cinfo.do_fancy_upsampling = FALSE;
355		766
356	while (cinfo.scale_denom < 8	767	while (cinfo.scale_denom < 8
357	&& cinfo.output_width >= IW*4	768	&& cinfo.output_width >= iw*4
358	&& cinfo.output_height >= IH*4)	769	&& cinfo.output_height >= ih*4)
359	{	770	{
360	cinfo.scale_denom <<= 1;	771	cinfo.scale_denom <<= 1;
361	jpeg_calc_output_dimensions (&cinfo);	772	jpeg_calc_output_dimensions (&cinfo);
362	}	773	}
363	}	774	}
364		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
365	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);
366	if (!RETVAL)	786	if (!RETVAL)
367	longjmp (jerr.setjmp_buffer, 2);	787	longjmp (jerr.setjmp_buffer, 2);
368		788
369	data = gdk_pixbuf_get_pixels (RETVAL);	789	data = gdk_pixbuf_get_pixels (RETVAL);
370	rs = gdk_pixbuf_get_rowstride (RETVAL);	790	rs = gdk_pixbuf_get_rowstride (RETVAL);
371
372	if (cinfo.output_components != 3)
373	longjmp (jerr.setjmp_buffer, 3);
374		791
375	jpeg_start_decompress (&cinfo);	792	jpeg_start_decompress (&cinfo);
376		793
377	while (cinfo.output_scanline < cinfo.output_height)	794	while (cinfo.output_scanline < cinfo.output_height)
378	{	795	{
…		…
385	rp [3] = (guchar *)rp [2] + rs;	802	rp [3] = (guchar *)rp [2] + rs;
386		803
387	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	804	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
388	}	805	}
389		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
390	jpeg_finish_decompress (&cinfo);	836	jpeg_finish_decompress (&cinfo);
391	fclose (fp);
392	jpeg_destroy_decompress (&cinfo);	837	jpeg_destroy_decompress (&cinfo);
		838	perlinterp_acquire ();
393	}	839	}
394	OUTPUT:	840	OUTPUT:
395	RETVAL	841	RETVAL
396		842
397	void	843	void
398	compare (GdkPixbuf a, GdkPixbuf b)	844	compare (GdkPixbuf a, GdkPixbuf b)
399	PPCODE:	845	PPCODE:
		846	perlinterp_release ();
400	{	847	{
401	int w = gdk_pixbuf_get_width (a);	848	int w = gdk_pixbuf_get_width (a);
402	int h = gdk_pixbuf_get_height (a);	849	int h = gdk_pixbuf_get_height (a);
		850
403	int sa = gdk_pixbuf_get_rowstride (a);	851	int sa = gdk_pixbuf_get_rowstride (a);
404	int sb = gdk_pixbuf_get_rowstride (b);	852	int sb = gdk_pixbuf_get_rowstride (b);
405		853
406	guchar *pa = gdk_pixbuf_get_pixels (a);	854	guchar *pa = gdk_pixbuf_get_pixels (a);
407	guchar *pb = gdk_pixbuf_get_pixels (b);	855	guchar *pb = gdk_pixbuf_get_pixels (b);
…		…
431	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));
432	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));
433	}	881	}
434	}	882	}
435		883
		884	perlinterp_acquire ();
		885
436	EXTEND (SP, 2);	886	EXTEND (SP, 2);
437	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));	887	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
438	PUSHs (sv_2mortal (newSVnv (peak / 255.)));	888	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
439	}	889	}
440		890
441	#############################################################################	891	#############################################################################
442		892
443	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	893	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
444		894
		895	# currently only works for filenames (octet strings)
		896
445	SV *	897	SV *
446	foldcase (SV *pathsv)	898	foldcase (SV *pathsv)
447	PROTOTYPE: $	899	PROTOTYPE: $
448	CODE:	900	CODE:
449	{	901	{
450	STRLEN plen;	902	STRLEN plen;
451	U8 path = (U8 )SvPVutf8 (pathsv, plen);	903	U8 path = (U8 )SvPV (pathsv, plen);
452	U8 *pend = path + plen;	904	U8 *pend = path + plen;
453	U8 dst [plen * 6 * 3], *dstp = dst;	905	U8 dst [plen * 8 * 3], *dstp = dst;
454		906
455	while (path < pend)	907	while (path < pend)
456	{	908	{
457	U8 ch = *path;	909	U8 ch = *path;
458		910
459	if (ch >= 'a' && ch <= 'z')	911	if (ch >= 'a' && ch <= 'z')
460	dstp++ = path++;	912	dstp++ = path++;
		913	else if (ch >= 'A' && ch <= 'Z')
		914	dstp++ = path++ + ('a' - 'A');
461	else if (ch >= '0' && ch <= '9')	915	else if (ch >= '0' && ch <= '9')
462	{	916	{
		917	/* version sort, up to 8 digits */
463	STRLEN el, nl = 0;	918	STRLEN el, nl = 0;
464	while (path >= '0' && path <= '9' && path < pend)	919	while (path >= '0' && path <= '9' && path < pend)
465	path++, nl++;	920	path++, nl++;
466		921
467	for (el = nl; el < 6; el++)	922	for (el = nl; el < 8; el++)
468	*dstp++ = '0';	923	*dstp++ = '0';
469		924
470	memcpy (dstp, path - nl, nl);	925	memcpy (dstp, path - nl, nl);
471	dstp += nl;	926	dstp += nl;
472	}	927	}
		928	else
		929	dstp++ = path++;
		930	#if 0
473	else	931	else
474	{	932	{
475	STRLEN cl;	933	STRLEN cl;
476	to_utf8_fold (path, dstp, &cl);	934	to_utf8_fold (path, dstp, &cl);
477	dstp += cl;	935	dstp += cl;
478	path += is_utf8_char (path);	936	path += is_utf8_char (path);
479	}	937	}
		938	#endif
480	}	939	}
481		940
482	RETVAL = newSVpvn ((const char *)dst, dstp - dst);	941	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
483	}	942	}
484	OUTPUT:	943	OUTPUT:

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Comparing CV/CV.xs (file contents): Revision 1.40 by root, Sat Nov 25 15:00:51 2006 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 1.40 by root, Sat Nov 25 15:00:51 2006 UTC vs.
Revision 1.63 by root, Sun Nov 28 23:26:51 2021 UTC