CV/CV.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <string.h>
#include <setjmp.h>

#include <magic.h>

#include <jpeglib.h>
#include <glib.h>
#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

#include <gperl.h>
#include <gtk2perl.h>

#define IW 80 /* MUST match Schnauer.pm! */
#define IH 60 /* MUST match Schnauer.pm! */

#define RAND (seed = (seed + 7141) * 54773 % 134456)

#define LINELENGTH 240

#define ELLIPSIS "\xe2\x80\xa6"

struct jpg_err_mgr
{
  struct jpeg_error_mgr err;
  jmp_buf setjmp_buffer;
};

static void
cv_error_exit (j_common_ptr cinfo)
{
  longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
}

static void
cv_error_output (j_common_ptr cinfo)
{
  return;
}

static void
rgb_to_hsv (unsigned int  r, unsigned int  g, unsigned int  b,
            unsigned int *h, unsigned int *s, unsigned int *v)
{
  unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
  unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
  unsigned int delta = mx - mn;

  *v = mx;

  *s = mx ? delta * 255 / mx : 0;

  if (delta == 0)
    *h = 0;
  else
    {
      if (r == mx)
        *h = ((int)g - (int)b) * 255 / (int)(delta * 3);
      else if (g == mx)
        *h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52;
      else if (b == mx)
        *h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103;

      *h &= 255;
    }
}

static guint32 a85_val;
static guint a85_cnt;
static guchar a85_buf[LINELENGTH], *a85_ptr;

static void
a85_init (void)
{
  a85_cnt = 4;
  a85_ptr = a85_buf;
}

static void
a85_push (PerlIO *fp, guchar c)
{
  a85_val = a85_val << 8 | c;

  if (!--a85_cnt)
    {
      a85_cnt = 4;
      if (a85_val)
        {
          a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 
          a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 
          a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 
          a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
          a85_ptr[0] = (a85_val     ) + 33;

          a85_ptr += 5;
        }
      else
        *a85_ptr++ = 'z';

      if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
        {
          *a85_ptr++ = '\n';
          PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
          a85_ptr = a85_buf;
        }
    }
    
}

static void
a85_finish (PerlIO *fp)
{
  while (a85_cnt != 4)
    a85_push (fp, 0);

  *a85_ptr++ = '~'; // probably buggy end-marker
  *a85_ptr++ = '>'; // probably buggy end-marker
  *a85_ptr++ = '\n';

  PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
}

/////////////////////////////////////////////////////////////////////////////

MODULE = Gtk2::CV PACKAGE = Gtk2::CV

PROTOTYPES: ENABLE

# missing function in perl. really :)
int
common_prefix_length (a, b)
        unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
        unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
        CODE:
        RETVAL = 0;

        while (*a == *b && *a)
          {
            RETVAL += (*a & 0xc0) != 0x80;
            a++, b++;
          }

        OUTPUT:
        RETVAL

const char *
magic (const char *path)
        CODE:
{
        static magic_t cookie;

        if (!cookie)
          {
            cookie = magic_open (MAGIC_MIME);

            if (cookie)
              magic_load (cookie, 0);
            else
              XSRETURN_UNDEF;
          }

        RETVAL = magic_file (cookie, path);
}
        OUTPUT:
        RETVAL

# missing in Gtk2 perl module

gboolean
gdk_net_wm_supports (GdkAtom property)
        CODE:
#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
        RETVAL = gdk_net_wm_supports (property);
#else
        RETVAL = 0;
#endif
        OUTPUT:
        RETVAL

GdkPixbuf_noinc *
dealpha_expose (GdkPixbuf *pb)
        CODE:
{
        int w = gdk_pixbuf_get_width (pb);
        int h = gdk_pixbuf_get_height (pb);
        int bpp = gdk_pixbuf_get_n_channels (pb);
        int x, y, i;
        guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
        int sstr = gdk_pixbuf_get_rowstride (pb), dstr;

        RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);

        dst = gdk_pixbuf_get_pixels (RETVAL);
        dstr = gdk_pixbuf_get_rowstride (RETVAL);

        for (x = 0; x < w; x++)
          for (y = 0; y < h; y++)
            for (i = 0; i < 3; i++)
              dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
}
        OUTPUT:
        RETVAL

GdkPixbuf_noinc *
rotate (GdkPixbuf *pb, int angle)
        CODE:
        RETVAL = gdk_pixbuf_rotate_simple (pb, angle ==   0 ? GDK_PIXBUF_ROTATE_NONE
                                             : angle ==  90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
                                             : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
                                             : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
                                             : angle);
        OUTPUT:
        RETVAL

GdkPixbuf_noinc *
load_jpeg (SV *path, int thumbnail=0)
        CODE:
{
        struct jpeg_decompress_struct cinfo;
        struct jpg_err_mgr jerr;
        guchar *data;
        int rs;
        FILE *fp;
        volatile GdkPixbuf *pb = 0;

        RETVAL = 0;

        fp = fopen (SvPVbyte_nolen (path), "rb");

        if (!fp)
          XSRETURN_UNDEF;

        cinfo.err = jpeg_std_error (&jerr.err);

        jerr.err.error_exit     = cv_error_exit;
        jerr.err.output_message = cv_error_output;

        if ((rs = setjmp (jerr.setjmp_buffer)))
          {
            fclose (fp);
            jpeg_destroy_decompress (&cinfo);

            if (pb)
              g_object_unref ((gpointer)pb);

            XSRETURN_UNDEF;
          }

        jpeg_create_decompress (&cinfo);

        jpeg_stdio_src (&cinfo, fp);
        jpeg_read_header (&cinfo, TRUE);

        cinfo.dct_method          = JDCT_DEFAULT;
        cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
        cinfo.do_block_smoothing  = FALSE;
        cinfo.out_color_space     = JCS_RGB;
        cinfo.quantize_colors     = FALSE;

        cinfo.scale_num   = 1;
        cinfo.scale_denom = 1;

        jpeg_calc_output_dimensions (&cinfo);

        if (thumbnail)
          {
            cinfo.dct_method          = JDCT_FASTEST;
            cinfo.do_fancy_upsampling = FALSE;

            while (cinfo.scale_denom < 8
                   && cinfo.output_width  >= IW*4
                   && cinfo.output_height >= IH*4)
              {
                cinfo.scale_denom <<= 1;
                jpeg_calc_output_dimensions (&cinfo);
              }
          }

        pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8,  cinfo.output_width, cinfo.output_height);
        if (!RETVAL)
          longjmp (jerr.setjmp_buffer, 2);

        data = gdk_pixbuf_get_pixels (RETVAL);
        rs = gdk_pixbuf_get_rowstride (RETVAL);

        if (cinfo.output_components != 3)
          longjmp (jerr.setjmp_buffer, 3);

        jpeg_start_decompress (&cinfo);

        while (cinfo.output_scanline < cinfo.output_height)
          {
            int remaining = cinfo.output_height - cinfo.output_scanline;
            JSAMPROW rp[4];

            rp [0] = data + cinfo.output_scanline * rs;
            rp [1] = (guchar *)rp [0] + rs;
            rp [2] = (guchar *)rp [1] + rs;
            rp [3] = (guchar *)rp [2] + rs;

            jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
          }

        jpeg_finish_decompress (&cinfo);
        fclose (fp);
        jpeg_destroy_decompress (&cinfo);
}
        OUTPUT:
        RETVAL

#############################################################################

MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer

SV *
foldcase (SV *pathsv)
        PROTOTYPE: $
        CODE:
{
        STRLEN plen;
        U8 *path = (U8 *)SvPVutf8 (pathsv, plen);
        U8 *pend = path + plen;
        U8 dst [plen * 6 * 3], *dstp = dst;

        while (path < pend)
          {
            U8 ch = *path;

            if (ch >= 'a' && ch <= 'z')
              *dstp++ = *path++;
            else if (ch >= '0' && ch <= '9')
              {
                STRLEN el, nl = 0;
                while (*path >= '0' && *path <= '9' && path < pend)
                  path++, nl++;

                for (el = nl; el < 6; el++)
                  *dstp++ = '0';

                memcpy (dstp, path - nl, nl);
                dstp += nl;
              }
            else
              {
                STRLEN cl;
                to_utf8_fold (path, dstp, &cl);
                dstp += cl;
                path += is_utf8_char (path);
              }
          }

        RETVAL = newSVpvn ((const char *)dst, dstp - dst);
}
        OUTPUT:
        RETVAL

GdkPixbuf_noinc *
p7_to_pb (int w, int h, SV *src_sv)
        PROTOTYPE: @
        CODE:
{
        int x, y;
        guchar *dst, *d;
        int dstr;
        guchar *src = (guchar *)SvPVbyte_nolen (src_sv);

        RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8,  w, h);
        dst = gdk_pixbuf_get_pixels (RETVAL);
        dstr = gdk_pixbuf_get_rowstride (RETVAL);

        for (y = 0; y < h; y++)
          for (d = dst + y * dstr, x = 0; x < w; x++)
            {
              *d++ = (((*src >> 5) & 7) * 255 + 4) / 7;
              *d++ = (((*src >> 2) & 7) * 255 + 4) / 7;
              *d++ = (((*src >> 0) & 3) * 255 + 2) / 3;

              src++;
            }
}
        OUTPUT:
        RETVAL

#############################################################################

MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript

void
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
        CODE:
{
        int w = gdk_pixbuf_get_width  (pb);
        int h = gdk_pixbuf_get_height (pb);
        int x, y, i;
        guchar *dst;
        int bpp = gdk_pixbuf_get_n_channels (pb);
        guchar *src = gdk_pixbuf_get_pixels (pb);
        int sstr = gdk_pixbuf_get_rowstride (pb);

        a85_init ();

        for (y = 0; y < h; y++)
          for (x = 0; x < w; x++)
            for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
              a85_push (fp, src [x * bpp + y * sstr + i]);

        a85_finish (fp);
}

void
dump_binary (PerlIO *fp, GdkPixbuf *pb)
        CODE:
{
        int w = gdk_pixbuf_get_width  (pb);
        int h = gdk_pixbuf_get_height (pb);
        int x, y, i;
        guchar *dst;
        int bpp = gdk_pixbuf_get_n_channels (pb);
        guchar *src = gdk_pixbuf_get_pixels (pb);
        int sstr = gdk_pixbuf_get_rowstride (pb);

        for (y = 0; y < h; y++)
          for (x = 0; x < w; x++)
            for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
              PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
}

#############################################################################

MODULE = Gtk2::CV PACKAGE = Gtk2::CV

SV *
pb_to_hv84 (GdkPixbuf *pb)
        CODE:
{
        int w = gdk_pixbuf_get_width  (pb);
        int h = gdk_pixbuf_get_height (pb);
        int x, y;
        guchar *dst;
        int bpp = gdk_pixbuf_get_n_channels (pb);
        guchar *src = gdk_pixbuf_get_pixels (pb);
        int sstr = gdk_pixbuf_get_rowstride (pb);

        RETVAL = newSV (6 * 8 * 12 / 8);
        SvPOK_only (RETVAL);
        SvCUR_set (RETVAL, 6 * 8 * 12 / 8);

        dst = (guchar *)SvPVX (RETVAL);

        /* some primitive error distribution + random dithering */

        for (y = 0; y < h; y++)
          {
            guchar *p = src + y * sstr;

            for (x = 0; x < w; x += 2)
              {
                unsigned int r, g, b, h, s, v, H, V1, V2;

                if (bpp == 3)
                  r = *p++, g = *p++, b = *p++;
                else if (bpp == 1)
                  r = g = b = *p++;
                else
                  abort ();

                rgb_to_hsv (r, g, b, &h, &s, &v);

                H = (h * 15 / 255) << 4;
                V1 = v;

                if (bpp == 3)
                  r = *p++, g = *p++, b = *p++;
                else if (bpp == 1)
                  r = g = b = *p++;
                else
                  abort ();

                rgb_to_hsv (r, g, b, &h, &s, &v);

                H |= h * 15 / 255;
                V2 = v;

                *dst++ = H;
                *dst++ = V1;
                *dst++ = V2;
              }
          }
}
        OUTPUT:
        RETVAL

SV *
hv84_to_av (unsigned char *hv84)
        CODE:
{
        int i = 72 / 3;
        AV *av = newAV ();

        RETVAL = (SV *)newRV_noinc ((SV *)av);
        while (i--)
          {
            int h  = *hv84++;
            int v1 = *hv84++;
            int v2 = *hv84++;

            av_push (av, newSViv (v1));
            av_push (av, newSViv ((h >> 4) * 255 / 15));
            av_push (av, newSViv (v2));
            av_push (av, newSViv ((h & 15) * 255 / 15));
          }
}
        OUTPUT:
        RETVAL

#############################################################################

MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster

SV *
make_histograms (SV *ar)
        CODE:
{
        int i;
        AV *av, *result;

        if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
          croak ("Not an array ref as first argument to make_histogram");

        av = (AV *) SvRV (ar);
        result = newAV ();

        for (i = 0; i <= av_len (av); ++i)
          {
            const int HISTSIZE = 64;

            int j;
            SV *sv = *av_fetch (av, i, 1);
            STRLEN len;
            char *buf = SvPVbyte (sv, len);

            int tmphist[HISTSIZE];
            float *hist;

            SV *histsv = newSV (HISTSIZE * sizeof (float) + 1);
            SvPOK_on (histsv);
            SvCUR_set (histsv, HISTSIZE * sizeof (float));
            hist = (float *)SvPVX (histsv);

            Zero (tmphist, sizeof (tmphist), char);

            for (j = len; j--; )
              {
                unsigned int idx
                    = ((*buf & 0xc0) >> 2)
                    | ((*buf & 0x18) >> 1)
                    |  (*buf & 0x03);

                ++tmphist[idx];
                ++buf;
              }
            
            for (j = 0; j < HISTSIZE; ++j)
              hist[j] = (float)tmphist[j] / (len + 1e-30);

            av_push (result, histsv);
          }

        RETVAL = newRV_noinc ((SV *)result);
}
        OUTPUT:
        RETVAL


Revision:	1.31
Committed:	Wed Feb 15 08:08:37 2006 UTC (18 years, 3 months ago) by root
Branch:	MAIN
Changes since 1.30:	+23 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5	root	1.18	#include <string.h>
6	root	1.17	#include <setjmp.h>
7
8	root	1.31	#include <magic.h>
9
10	root	1.17	#include <jpeglib.h>
11	root	1.23	#include <glib.h>
12			#include <gtk/gtk.h>
13	root	1.2	#include <gdk-pixbuf/gdk-pixbuf.h>
14
15			#include <gperl.h>
16			#include <gtk2perl.h>
17
18	root	1.17	#define IW 80 /* MUST match Schnauer.pm! */
19			#define IH 60 /* MUST match Schnauer.pm! */
20	root	1.5
21			#define RAND (seed = (seed + 7141) * 54773 % 134456)
22
23	root	1.7	#define LINELENGTH 240
24
25	root	1.6	#define ELLIPSIS "\xe2\x80\xa6"
26
27	root	1.17	struct jpg_err_mgr
28			{
29			struct jpeg_error_mgr err;
30			jmp_buf setjmp_buffer;
31			};
32
33			static void
34			cv_error_exit (j_common_ptr cinfo)
35			{
36			longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
37			}
38
39			static void
40			cv_error_output (j_common_ptr cinfo)
41			{
42			return;
43			}
44
45			static void
46			rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
47			unsigned int h, unsigned int s, unsigned int *v)
48			{
49			unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
50			unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
51			unsigned int delta = mx - mn;
52
53			*v = mx;
54
55			s = mx ? delta 255 / mx : 0;
56
57			if (delta == 0)
58			*h = 0;
59			else
60			{
61			if (r == mx)
62			h = ((int)g - (int)b) 255 / (int)(delta * 3);
63			else if (g == mx)
64			h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
65			else if (b == mx)
66			h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
67
68			*h &= 255;
69			}
70			}
71
72	root	1.4	static guint32 a85_val;
73			static guint a85_cnt;
74	root	1.7	static guchar a85_buf[LINELENGTH], *a85_ptr;
75	root	1.4
76			static void
77			a85_init (void)
78			{
79			a85_cnt = 4;
80			a85_ptr = a85_buf;
81			}
82
83			static void
84			a85_push (PerlIO *fp, guchar c)
85			{
86			a85_val = a85_val << 8 \| c;
87
88			if (!--a85_cnt)
89			{
90			a85_cnt = 4;
91			if (a85_val)
92			{
93			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
94			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
95			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
96			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
97			a85_ptr[0] = (a85_val ) + 33;
98
99			a85_ptr += 5;
100			}
101			else
102			*a85_ptr++ = 'z';
103
104			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
105			{
106			*a85_ptr++ = '\n';
107			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
108			a85_ptr = a85_buf;
109			}
110			}
111
112			}
113
114	root	1.8	static void
115	root	1.4	a85_finish (PerlIO *fp)
116			{
117			while (a85_cnt != 4)
118			a85_push (fp, 0);
119
120			*a85_ptr++ = '~'; // probably buggy end-marker
121			*a85_ptr++ = '>'; // probably buggy end-marker
122			*a85_ptr++ = '\n';
123
124			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
125			}
126
127	root	1.6	/////////////////////////////////////////////////////////////////////////////
128
129	root	1.9	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
130	root	1.1
131			PROTOTYPES: ENABLE
132	root	1.2
133	root	1.29	# missing function in perl. really :)
134			int
135			common_prefix_length (a, b)
136			unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
137			unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
138			CODE:
139			RETVAL = 0;
140
141			while (a == b && *a)
142			{
143			RETVAL += (*a & 0xc0) != 0x80;
144			a++, b++;
145			}
146
147			OUTPUT:
148			RETVAL
149
150	root	1.31	const char *
151			magic (const char *path)
152			CODE:
153			{
154			static magic_t cookie;
155
156			if (!cookie)
157			{
158			cookie = magic_open (MAGIC_MIME);
159
160			if (cookie)
161			magic_load (cookie, 0);
162			else
163			XSRETURN_UNDEF;
164			}
165
166			RETVAL = magic_file (cookie, path);
167			}
168			OUTPUT:
169			RETVAL
170
171	root	1.22	# missing in Gtk2 perl module
172
173			gboolean
174			gdk_net_wm_supports (GdkAtom property)
175			CODE:
176			#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
177			RETVAL = gdk_net_wm_supports (property);
178			#else
179			RETVAL = 0;
180			#endif
181			OUTPUT:
182			RETVAL
183
184	root	1.3	GdkPixbuf_noinc *
185	root	1.26	dealpha_expose (GdkPixbuf *pb)
186			CODE:
187			{
188			int w = gdk_pixbuf_get_width (pb);
189			int h = gdk_pixbuf_get_height (pb);
190			int bpp = gdk_pixbuf_get_n_channels (pb);
191			int x, y, i;
192			guchar src = gdk_pixbuf_get_pixels (pb), dst;
193			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
194
195			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
196
197			dst = gdk_pixbuf_get_pixels (RETVAL);
198			dstr = gdk_pixbuf_get_rowstride (RETVAL);
199
200			for (x = 0; x < w; x++)
201			for (y = 0; y < h; y++)
202			for (i = 0; i < 3; i++)
203			dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
204			}
205			OUTPUT:
206			RETVAL
207
208			GdkPixbuf_noinc *
209	root	1.28	rotate (GdkPixbuf *pb, int angle)
210	root	1.2	CODE:
211	root	1.28	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
212			: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
213			: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
214			: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
215			: angle);
216	root	1.2	OUTPUT:
217			RETVAL
218
219	root	1.17	GdkPixbuf_noinc *
220	root	1.23	load_jpeg (SV *path, int thumbnail=0)
221	root	1.17	CODE:
222			{
223			struct jpeg_decompress_struct cinfo;
224			struct jpg_err_mgr jerr;
225			guchar *data;
226			int rs;
227			FILE *fp;
228			volatile GdkPixbuf *pb = 0;
229	root	1.23
230	root	1.17	RETVAL = 0;
231
232	root	1.30	fp = fopen (SvPVbyte_nolen (path), "rb");
233	root	1.23
234			if (!fp)
235	root	1.17	XSRETURN_UNDEF;
236
237			cinfo.err = jpeg_std_error (&jerr.err);
238
239			jerr.err.error_exit = cv_error_exit;
240			jerr.err.output_message = cv_error_output;
241
242			if ((rs = setjmp (jerr.setjmp_buffer)))
243			{
244			fclose (fp);
245			jpeg_destroy_decompress (&cinfo);
246
247			if (pb)
248			g_object_unref ((gpointer)pb);
249
250			XSRETURN_UNDEF;
251			}
252
253			jpeg_create_decompress (&cinfo);
254
255			jpeg_stdio_src (&cinfo, fp);
256			jpeg_read_header (&cinfo, TRUE);
257
258			cinfo.dct_method = JDCT_DEFAULT;
259			cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
260			cinfo.do_block_smoothing = FALSE;
261			cinfo.out_color_space = JCS_RGB;
262			cinfo.quantize_colors = FALSE;
263
264			cinfo.scale_num = 1;
265			cinfo.scale_denom = 1;
266
267			jpeg_calc_output_dimensions (&cinfo);
268
269			if (thumbnail)
270			{
271			cinfo.dct_method = JDCT_FASTEST;
272			cinfo.do_fancy_upsampling = FALSE;
273
274			while (cinfo.scale_denom < 8
275	root	1.21	&& cinfo.output_width >= IW*4
276			&& cinfo.output_height >= IH*4)
277	root	1.17	{
278			cinfo.scale_denom <<= 1;
279			jpeg_calc_output_dimensions (&cinfo);
280			}
281			}
282
283			pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
284			if (!RETVAL)
285			longjmp (jerr.setjmp_buffer, 2);
286
287			data = gdk_pixbuf_get_pixels (RETVAL);
288			rs = gdk_pixbuf_get_rowstride (RETVAL);
289
290			if (cinfo.output_components != 3)
291			longjmp (jerr.setjmp_buffer, 3);
292
293			jpeg_start_decompress (&cinfo);
294
295			while (cinfo.output_scanline < cinfo.output_height)
296			{
297			int remaining = cinfo.output_height - cinfo.output_scanline;
298			JSAMPROW rp[4];
299
300			rp [0] = data + cinfo.output_scanline * rs;
301			rp [1] = (guchar *)rp [0] + rs;
302			rp [2] = (guchar *)rp [1] + rs;
303			rp [3] = (guchar *)rp [2] + rs;
304
305			jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
306			}
307
308			jpeg_finish_decompress (&cinfo);
309			fclose (fp);
310			jpeg_destroy_decompress (&cinfo);
311			}
312			OUTPUT:
313			RETVAL
314
315	root	1.6	#############################################################################
316
317	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
318
319	root	1.18	SV *
320			foldcase (SV *pathsv)
321			PROTOTYPE: $
322			CODE:
323			{
324			STRLEN plen;
325	root	1.25	U8 path = (U8 )SvPVutf8 (pathsv, plen);
326	root	1.18	U8 *pend = path + plen;
327			U8 dst [plen * 6 * 3], *dstp = dst;
328
329			while (path < pend)
330			{
331	root	1.19	U8 ch = *path;
332
333			if (ch >= 'a' && ch <= 'z')
334			dstp++ = path++;
335			else if (ch >= '0' && ch <= '9')
336	root	1.18	{
337			STRLEN el, nl = 0;
338	root	1.19	while (path >= '0' && path <= '9' && path < pend)
339	root	1.18	path++, nl++;
340
341			for (el = nl; el < 6; el++)
342			*dstp++ = '0';
343
344			memcpy (dstp, path - nl, nl);
345			dstp += nl;
346			}
347			else
348			{
349			STRLEN cl;
350			to_utf8_fold (path, dstp, &cl);
351			dstp += cl;
352			path += is_utf8_char (path);
353			}
354			}
355
356	root	1.25	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
357	root	1.18	}
358			OUTPUT:
359			RETVAL
360
361	root	1.3	GdkPixbuf_noinc *
362	root	1.24	p7_to_pb (int w, int h, SV *src_sv)
363	root	1.21	PROTOTYPE: @
364	root	1.2	CODE:
365			{
366			int x, y;
367			guchar dst, d;
368			int dstr;
369	root	1.25	guchar src = (guchar )SvPVbyte_nolen (src_sv);
370	root	1.2
371			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
372			dst = gdk_pixbuf_get_pixels (RETVAL);
373			dstr = gdk_pixbuf_get_rowstride (RETVAL);
374
375			for (y = 0; y < h; y++)
376			for (d = dst + y * dstr, x = 0; x < w; x++)
377			{
378	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
379			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
380			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
381	root	1.2
382			src++;
383			}
384	root	1.3	}
385			OUTPUT:
386			RETVAL
387
388	root	1.6	#############################################################################
389	root	1.4
390			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
391
392			void
393	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
394	root	1.4	CODE:
395			{
396			int w = gdk_pixbuf_get_width (pb);
397			int h = gdk_pixbuf_get_height (pb);
398			int x, y, i;
399			guchar *dst;
400	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
401	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
402			int sstr = gdk_pixbuf_get_rowstride (pb);
403
404			a85_init ();
405
406			for (y = 0; y < h; y++)
407			for (x = 0; x < w; x++)
408	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
409	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
410
411			a85_finish (fp);
412	root	1.7	}
413
414			void
415			dump_binary (PerlIO fp, GdkPixbuf pb)
416			CODE:
417			{
418			int w = gdk_pixbuf_get_width (pb);
419			int h = gdk_pixbuf_get_height (pb);
420			int x, y, i;
421			guchar *dst;
422			int bpp = gdk_pixbuf_get_n_channels (pb);
423			guchar *src = gdk_pixbuf_get_pixels (pb);
424			int sstr = gdk_pixbuf_get_rowstride (pb);
425
426			for (y = 0; y < h; y++)
427			for (x = 0; x < w; x++)
428			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
429			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
430	root	1.4	}
431	root	1.8
432			#############################################################################
433
434			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
435
436			SV *
437			pb_to_hv84 (GdkPixbuf *pb)
438			CODE:
439			{
440			int w = gdk_pixbuf_get_width (pb);
441			int h = gdk_pixbuf_get_height (pb);
442			int x, y;
443			guchar *dst;
444			int bpp = gdk_pixbuf_get_n_channels (pb);
445			guchar *src = gdk_pixbuf_get_pixels (pb);
446			int sstr = gdk_pixbuf_get_rowstride (pb);
447
448			RETVAL = newSV (6 * 8 * 12 / 8);
449			SvPOK_only (RETVAL);
450			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
451
452	root	1.25	dst = (guchar *)SvPVX (RETVAL);
453	root	1.8
454			/* some primitive error distribution + random dithering */
455
456			for (y = 0; y < h; y++)
457			{
458			guchar p = src + y sstr;
459
460			for (x = 0; x < w; x += 2)
461			{
462			unsigned int r, g, b, h, s, v, H, V1, V2;
463
464			if (bpp == 3)
465			r = p++, g = p++, b = *p++;
466			else if (bpp == 1)
467			r = g = b = *p++;
468			else
469			abort ();
470
471			rgb_to_hsv (r, g, b, &h, &s, &v);
472
473			H = (h * 15 / 255) << 4;
474			V1 = v;
475
476			if (bpp == 3)
477			r = p++, g = p++, b = *p++;
478			else if (bpp == 1)
479			r = g = b = *p++;
480			else
481			abort ();
482
483			rgb_to_hsv (r, g, b, &h, &s, &v);
484
485			H \|= h * 15 / 255;
486			V2 = v;
487
488			*dst++ = H;
489			*dst++ = V1;
490			*dst++ = V2;
491			}
492			}
493			}
494			OUTPUT:
495			RETVAL
496	root	1.4
497	root	1.9	SV *
498			hv84_to_av (unsigned char *hv84)
499			CODE:
500			{
501			int i = 72 / 3;
502			AV *av = newAV ();
503
504			RETVAL = (SV )newRV_noinc ((SV )av);
505			while (i--)
506			{
507			int h = *hv84++;
508			int v1 = *hv84++;
509			int v2 = *hv84++;
510
511			av_push (av, newSViv (v1));
512			av_push (av, newSViv ((h >> 4) * 255 / 15));
513			av_push (av, newSViv (v2));
514			av_push (av, newSViv ((h & 15) * 255 / 15));
515			}
516			}
517			OUTPUT:
518			RETVAL
519	root	1.2
520	root	1.20	#############################################################################
521
522			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
523
524			SV *
525			make_histograms (SV *ar)
526			CODE:
527			{
528			int i;
529			AV av, result;
530
531			if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
532			croak ("Not an array ref as first argument to make_histogram");
533
534			av = (AV *) SvRV (ar);
535			result = newAV ();
536
537			for (i = 0; i <= av_len (av); ++i)
538			{
539			const int HISTSIZE = 64;
540
541			int j;
542			SV sv = av_fetch (av, i, 1);
543			STRLEN len;
544			char *buf = SvPVbyte (sv, len);
545
546			int tmphist[HISTSIZE];
547			float *hist;
548
549			SV histsv = newSV (HISTSIZE sizeof (float) + 1);
550			SvPOK_on (histsv);
551			SvCUR_set (histsv, HISTSIZE * sizeof (float));
552			hist = (float *)SvPVX (histsv);
553
554			Zero (tmphist, sizeof (tmphist), char);
555
556			for (j = len; j--; )
557			{
558			unsigned int idx
559			= ((*buf & 0xc0) >> 2)
560			\| ((*buf & 0x18) >> 1)
561			\| (*buf & 0x03);
562
563			++tmphist[idx];
564			++buf;
565			}
566
567			for (j = 0; j < HISTSIZE; ++j)
568			hist[j] = (float)tmphist[j] / (len + 1e-30);
569
570			av_push (result, histsv);
571			}
572
573			RETVAL = newRV_noinc ((SV *)result);
574			}
575			OUTPUT:
576			RETVAL
577	root	1.1
578