CV/CV.xs

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

#include <string.h>
#include <setjmp.h>
#include <math.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 Schnauzer.pm! */
#define IH 60 /* MUST match Schnauzer.pm! */

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

#define LINELENGTH 240

#define ELLIPSIS "\xe2\x80\xa6"

typedef char *octet_string;

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;
    }
}

struct feature {
  float v1, v2, v3; // mean, square, cube
  int n;
};

static void
feature_init (struct feature *f)
{
  f->v1 = 0.;
  f->v2 = 0.;
  f->v3 = 0.;
  f->n  = 0;
}

// didn't find an algorithm to neatly do mean, variance and skew in one pass.
// elmex ist schuld.
static void
feature_update_pass_1 (struct feature *f, unsigned int v)
{
  f->v1 += v;
  f->n  += 1;
}

static void
feature_finish_pass_1 (struct feature *f)
{
  if (f->n < 1)
    return;

  f->v1 /= f->n;
}

static void
feature_update_pass_2 (struct feature *f, unsigned int v)
{
  float d = v - f->v1;

  f->v2 += d * d;
  f->v3 += d * d * d;
}

static void
feature_finish_pass_2 (struct feature *f)
{
  if (f->n < 1)
    return;

  f->v2 /= f->n;
  f->v3 /= f->n;

  f->v1 /= 255.;
  f->v2 /= 255. * 255.;        f->v2 = sqrtf (f->v2);
  f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
}

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 (octet_string path)
        CODE:
{
        static magic_t cookie;

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

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

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

const char *
magic_mime (octet_string 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/broken in Gtk2 perl module

void
gdk_window_clear_hints (GdkWindow *window)
        CODE:
        gdk_window_set_geometry_hints (window, 0, 0);

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

void
compare (GdkPixbuf *a, GdkPixbuf *b)
        PPCODE:
{
        int w  = gdk_pixbuf_get_width  (a);
        int h  = gdk_pixbuf_get_height (a);
        int sa = gdk_pixbuf_get_rowstride (a);
        int sb = gdk_pixbuf_get_rowstride (b);

        guchar *pa = gdk_pixbuf_get_pixels (a);
        guchar *pb = gdk_pixbuf_get_pixels (b);

        int x, y;

        assert (w == gdk_pixbuf_get_width  (b));
        assert (h == gdk_pixbuf_get_height (b));

        assert (gdk_pixbuf_get_n_channels (a) == 3);
        assert (gdk_pixbuf_get_n_channels (b) == 3);

        double diff = 0.;
        int peak = 0;

        if (w && h)
          for (y = 0; y < h; y++)
            {
              guchar *pa_ = pa + y * sa;
              guchar *pb_ = pb + y * sb;

              for (x = 0; x < w; x++)
                {
                  int d;

                  d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
                  d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
                  d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
                }
            }

        EXTEND (SP, 2);
        PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
        PUSHs (sv_2mortal (newSVnv (peak / 255.)));
}

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

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

# currently only works for filenames (octet strings)

SV *
foldcase (SV *pathsv)
        PROTOTYPE: $
        CODE:
{
        STRLEN plen;
        U8 *path = (U8 *)SvPV (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 >= 'A' && ch <= 'Z')
              *dstp++ = *path++ + ('a' - 'A');
            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
              *dstp++ = *path++;
#if 0
            else
              {
                STRLEN cl;
                to_utf8_fold (path, dstp, &cl);
                dstp += cl;
                path += is_utf8_char (path);
              }
#endif
          }

        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 *
extract_features (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 extract_features");

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

        for (i = 0; i <= av_len (av); ++i)
          {
            SV *sv = *av_fetch (av, i, 1);
            SV *histsv = newSV (9 * sizeof (float) + 1);

            SvPOK_on (histsv);
            SvCUR_set (histsv, 9 * sizeof (float));
            float *hist = (float *)SvPVX (histsv);

            struct feature f_h, f_s, f_v;
            feature_init (&f_h);
            feature_init (&f_s);
            feature_init (&f_v);

            {
              STRLEN len;
              unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
              while (len >= 3)
                {
                  unsigned int r, g, b, h, s, v;
                  r = *buf++; g = *buf++; b = *buf++;
                  rgb_to_hsv (r, g, b, &h, &s, &v);

                  feature_update_pass_1 (&f_h, h);
                  feature_update_pass_1 (&f_s, s);
                  feature_update_pass_1 (&f_v, v);

                  len -= 3;
                }

              feature_finish_pass_1 (&f_h);
              feature_finish_pass_1 (&f_s);
              feature_finish_pass_1 (&f_v);
            }

            {
              STRLEN len;
              unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
              while (len >= 3)
                {
                  unsigned int r, g, b, h, s, v;
                  r = *buf++; g = *buf++; b = *buf++;
                  rgb_to_hsv (r, g, b, &h, &s, &v);

                  feature_update_pass_2 (&f_h, h);
                  feature_update_pass_2 (&f_s, s);
                  feature_update_pass_2 (&f_v, v);

                  len -= 3;
                }

              feature_finish_pass_2 (&f_h);
              feature_finish_pass_2 (&f_s);
              feature_finish_pass_2 (&f_v);
            }

            hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
            hist [3] = f_s.v1     ; hist [4] = f_s.v2     ; hist [5] = f_s.v3     ;
            hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;

            av_push (result, histsv);
          }

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

Revision:	1.42
Committed:	Sun Sep 14 12:47:59 2008 UTC (15 years, 8 months ago) by root
Branch:	MAIN
CVS Tags:	rel-1_54
Changes since 1.41:	+4 -2 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	root	1.33	#include <math.h>
8	root	1.17
9	root	1.31	#include <magic.h>
10
11	root	1.17	#include <jpeglib.h>
12	root	1.23	#include <glib.h>
13			#include <gtk/gtk.h>
14	root	1.2	#include <gdk-pixbuf/gdk-pixbuf.h>
15
16			#include <gperl.h>
17			#include <gtk2perl.h>
18
19	root	1.33	#define IW 80 /* MUST match Schnauzer.pm! */
20			#define IH 60 /* MUST match Schnauzer.pm! */
21	root	1.5
22			#define RAND (seed = (seed + 7141) * 54773 % 134456)
23
24	root	1.7	#define LINELENGTH 240
25
26	root	1.6	#define ELLIPSIS "\xe2\x80\xa6"
27
28	root	1.42	typedef char *octet_string;
29
30	root	1.17	struct jpg_err_mgr
31			{
32			struct jpeg_error_mgr err;
33			jmp_buf setjmp_buffer;
34			};
35
36			static void
37			cv_error_exit (j_common_ptr cinfo)
38			{
39			longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
40			}
41
42			static void
43			cv_error_output (j_common_ptr cinfo)
44			{
45			return;
46			}
47
48			static void
49			rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
50			unsigned int h, unsigned int s, unsigned int *v)
51			{
52			unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
53			unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
54			unsigned int delta = mx - mn;
55
56			*v = mx;
57
58			s = mx ? delta 255 / mx : 0;
59
60			if (delta == 0)
61			*h = 0;
62			else
63			{
64			if (r == mx)
65			h = ((int)g - (int)b) 255 / (int)(delta * 3);
66			else if (g == mx)
67			h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
68			else if (b == mx)
69			h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
70
71			*h &= 255;
72			}
73			}
74
75	root	1.36	struct feature {
76			float v1, v2, v3; // mean, square, cube
77			int n;
78			};
79
80			static void
81			feature_init (struct feature *f)
82			{
83			f->v1 = 0.;
84			f->v2 = 0.;
85			f->v3 = 0.;
86			f->n = 0;
87			}
88
89			// didn't find an algorithm to neatly do mean, variance and skew in one pass.
90			// elmex ist schuld.
91			static void
92			feature_update_pass_1 (struct feature *f, unsigned int v)
93			{
94			f->v1 += v;
95			f->n += 1;
96			}
97
98			static void
99			feature_finish_pass_1 (struct feature *f)
100			{
101			if (f->n < 1)
102			return;
103
104			f->v1 /= f->n;
105			}
106
107			static void
108			feature_update_pass_2 (struct feature *f, unsigned int v)
109			{
110			float d = v - f->v1;
111
112			f->v2 += d * d;
113			f->v3 += d * d * d;
114			}
115
116			static void
117			feature_finish_pass_2 (struct feature *f)
118			{
119			if (f->n < 1)
120			return;
121
122			f->v2 /= f->n;
123			f->v3 /= f->n;
124
125			f->v1 /= 255.;
126	root	1.37	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
127			f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
128	root	1.36	}
129
130	root	1.4	static guint32 a85_val;
131			static guint a85_cnt;
132	root	1.7	static guchar a85_buf[LINELENGTH], *a85_ptr;
133	root	1.4
134			static void
135			a85_init (void)
136			{
137			a85_cnt = 4;
138			a85_ptr = a85_buf;
139			}
140
141			static void
142			a85_push (PerlIO *fp, guchar c)
143			{
144			a85_val = a85_val << 8 \| c;
145
146			if (!--a85_cnt)
147			{
148			a85_cnt = 4;
149			if (a85_val)
150			{
151			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
152			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
153			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
154			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
155			a85_ptr[0] = (a85_val ) + 33;
156
157			a85_ptr += 5;
158			}
159			else
160			*a85_ptr++ = 'z';
161
162			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
163			{
164			*a85_ptr++ = '\n';
165			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
166			a85_ptr = a85_buf;
167			}
168			}
169
170			}
171
172	root	1.8	static void
173	root	1.4	a85_finish (PerlIO *fp)
174			{
175			while (a85_cnt != 4)
176			a85_push (fp, 0);
177
178			*a85_ptr++ = '~'; // probably buggy end-marker
179			*a85_ptr++ = '>'; // probably buggy end-marker
180			*a85_ptr++ = '\n';
181
182			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
183			}
184
185	root	1.6	/////////////////////////////////////////////////////////////////////////////
186
187	root	1.9	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
188	root	1.1
189			PROTOTYPES: ENABLE
190	root	1.2
191	root	1.29	# missing function in perl. really :)
192			int
193			common_prefix_length (a, b)
194			unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
195			unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
196			CODE:
197			RETVAL = 0;
198
199			while (a == b && *a)
200			{
201			RETVAL += (*a & 0xc0) != 0x80;
202			a++, b++;
203			}
204
205			OUTPUT:
206			RETVAL
207
208	root	1.31	const char *
209	root	1.42	magic (octet_string path)
210	root	1.31	CODE:
211			{
212			static magic_t cookie;
213
214			if (!cookie)
215			{
216	root	1.32	cookie = magic_open (MAGIC_NONE);
217
218			if (cookie)
219			magic_load (cookie, 0);
220			else
221			XSRETURN_UNDEF;
222			}
223
224			RETVAL = magic_file (cookie, path);
225			}
226			OUTPUT:
227			RETVAL
228
229			const char *
230	root	1.42	magic_mime (octet_string path)
231	root	1.32	CODE:
232			{
233			static magic_t cookie;
234
235			if (!cookie)
236			{
237	root	1.31	cookie = magic_open (MAGIC_MIME);
238
239			if (cookie)
240			magic_load (cookie, 0);
241			else
242			XSRETURN_UNDEF;
243			}
244
245			RETVAL = magic_file (cookie, path);
246			}
247			OUTPUT:
248			RETVAL
249
250	root	1.40	# missing/broken in Gtk2 perl module
251
252			void
253			gdk_window_clear_hints (GdkWindow *window)
254			CODE:
255			gdk_window_set_geometry_hints (window, 0, 0);
256	root	1.22
257			gboolean
258			gdk_net_wm_supports (GdkAtom property)
259			CODE:
260			#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
261			RETVAL = gdk_net_wm_supports (property);
262			#else
263			RETVAL = 0;
264			#endif
265			OUTPUT:
266			RETVAL
267
268	root	1.3	GdkPixbuf_noinc *
269	root	1.26	dealpha_expose (GdkPixbuf *pb)
270			CODE:
271			{
272			int w = gdk_pixbuf_get_width (pb);
273			int h = gdk_pixbuf_get_height (pb);
274			int bpp = gdk_pixbuf_get_n_channels (pb);
275			int x, y, i;
276			guchar src = gdk_pixbuf_get_pixels (pb), dst;
277			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
278
279			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
280
281			dst = gdk_pixbuf_get_pixels (RETVAL);
282			dstr = gdk_pixbuf_get_rowstride (RETVAL);
283
284			for (x = 0; x < w; x++)
285			for (y = 0; y < h; y++)
286			for (i = 0; i < 3; i++)
287			dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
288			}
289			OUTPUT:
290			RETVAL
291
292			GdkPixbuf_noinc *
293	root	1.28	rotate (GdkPixbuf *pb, int angle)
294	root	1.2	CODE:
295	root	1.28	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
296			: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
297			: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
298			: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
299			: angle);
300	root	1.2	OUTPUT:
301			RETVAL
302
303	root	1.17	GdkPixbuf_noinc *
304	root	1.23	load_jpeg (SV *path, int thumbnail=0)
305	root	1.17	CODE:
306			{
307			struct jpeg_decompress_struct cinfo;
308			struct jpg_err_mgr jerr;
309			guchar *data;
310			int rs;
311			FILE *fp;
312			volatile GdkPixbuf *pb = 0;
313	root	1.23
314	root	1.17	RETVAL = 0;
315
316	root	1.30	fp = fopen (SvPVbyte_nolen (path), "rb");
317	root	1.23
318			if (!fp)
319	root	1.17	XSRETURN_UNDEF;
320
321			cinfo.err = jpeg_std_error (&jerr.err);
322
323			jerr.err.error_exit = cv_error_exit;
324			jerr.err.output_message = cv_error_output;
325
326			if ((rs = setjmp (jerr.setjmp_buffer)))
327			{
328			fclose (fp);
329			jpeg_destroy_decompress (&cinfo);
330
331			if (pb)
332			g_object_unref ((gpointer)pb);
333
334			XSRETURN_UNDEF;
335			}
336
337			jpeg_create_decompress (&cinfo);
338
339			jpeg_stdio_src (&cinfo, fp);
340			jpeg_read_header (&cinfo, TRUE);
341
342			cinfo.dct_method = JDCT_DEFAULT;
343			cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
344			cinfo.do_block_smoothing = FALSE;
345			cinfo.out_color_space = JCS_RGB;
346			cinfo.quantize_colors = FALSE;
347
348			cinfo.scale_num = 1;
349			cinfo.scale_denom = 1;
350
351			jpeg_calc_output_dimensions (&cinfo);
352
353			if (thumbnail)
354			{
355			cinfo.dct_method = JDCT_FASTEST;
356			cinfo.do_fancy_upsampling = FALSE;
357
358			while (cinfo.scale_denom < 8
359	root	1.21	&& cinfo.output_width >= IW*4
360			&& cinfo.output_height >= IH*4)
361	root	1.17	{
362			cinfo.scale_denom <<= 1;
363			jpeg_calc_output_dimensions (&cinfo);
364			}
365			}
366
367			pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
368			if (!RETVAL)
369			longjmp (jerr.setjmp_buffer, 2);
370
371			data = gdk_pixbuf_get_pixels (RETVAL);
372			rs = gdk_pixbuf_get_rowstride (RETVAL);
373
374			if (cinfo.output_components != 3)
375			longjmp (jerr.setjmp_buffer, 3);
376
377			jpeg_start_decompress (&cinfo);
378
379			while (cinfo.output_scanline < cinfo.output_height)
380			{
381			int remaining = cinfo.output_height - cinfo.output_scanline;
382			JSAMPROW rp[4];
383
384			rp [0] = data + cinfo.output_scanline * rs;
385			rp [1] = (guchar *)rp [0] + rs;
386			rp [2] = (guchar *)rp [1] + rs;
387			rp [3] = (guchar *)rp [2] + rs;
388
389			jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
390			}
391
392			jpeg_finish_decompress (&cinfo);
393			fclose (fp);
394			jpeg_destroy_decompress (&cinfo);
395			}
396			OUTPUT:
397			RETVAL
398
399	root	1.33	void
400			compare (GdkPixbuf a, GdkPixbuf b)
401			PPCODE:
402			{
403			int w = gdk_pixbuf_get_width (a);
404			int h = gdk_pixbuf_get_height (a);
405			int sa = gdk_pixbuf_get_rowstride (a);
406			int sb = gdk_pixbuf_get_rowstride (b);
407
408			guchar *pa = gdk_pixbuf_get_pixels (a);
409			guchar *pb = gdk_pixbuf_get_pixels (b);
410
411			int x, y;
412
413			assert (w == gdk_pixbuf_get_width (b));
414			assert (h == gdk_pixbuf_get_height (b));
415
416			assert (gdk_pixbuf_get_n_channels (a) == 3);
417			assert (gdk_pixbuf_get_n_channels (b) == 3);
418
419			double diff = 0.;
420			int peak = 0;
421
422	root	1.35	if (w && h)
423	root	1.34	for (y = 0; y < h; y++)
424			{
425			guchar pa_ = pa + y sa;
426			guchar pb_ = pb + y sb;
427	root	1.33
428	root	1.34	for (x = 0; x < w; x++)
429			{
430			int d;
431
432			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
433			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
434			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
435			}
436			}
437	root	1.33
438			EXTEND (SP, 2);
439			PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
440			PUSHs (sv_2mortal (newSVnv (peak / 255.)));
441			}
442
443	root	1.6	#############################################################################
444
445	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
446
447	root	1.41	# currently only works for filenames (octet strings)
448
449	root	1.18	SV *
450			foldcase (SV *pathsv)
451			PROTOTYPE: $
452			CODE:
453			{
454			STRLEN plen;
455	root	1.41	U8 path = (U8 )SvPV (pathsv, plen);
456	root	1.18	U8 *pend = path + plen;
457			U8 dst [plen * 6 * 3], *dstp = dst;
458
459			while (path < pend)
460			{
461	root	1.19	U8 ch = *path;
462
463			if (ch >= 'a' && ch <= 'z')
464			dstp++ = path++;
465	root	1.41	else if (ch >= 'A' && ch <= 'Z')
466			dstp++ = path++ + ('a' - 'A');
467	root	1.19	else if (ch >= '0' && ch <= '9')
468	root	1.18	{
469			STRLEN el, nl = 0;
470	root	1.19	while (path >= '0' && path <= '9' && path < pend)
471	root	1.18	path++, nl++;
472
473			for (el = nl; el < 6; el++)
474			*dstp++ = '0';
475
476			memcpy (dstp, path - nl, nl);
477			dstp += nl;
478			}
479			else
480	root	1.41	dstp++ = path++;
481			#if 0
482			else
483	root	1.18	{
484			STRLEN cl;
485			to_utf8_fold (path, dstp, &cl);
486			dstp += cl;
487			path += is_utf8_char (path);
488			}
489	root	1.41	#endif
490	root	1.18	}
491
492	root	1.25	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
493	root	1.18	}
494			OUTPUT:
495			RETVAL
496
497	root	1.3	GdkPixbuf_noinc *
498	root	1.24	p7_to_pb (int w, int h, SV *src_sv)
499	root	1.21	PROTOTYPE: @
500	root	1.2	CODE:
501			{
502			int x, y;
503			guchar dst, d;
504			int dstr;
505	root	1.25	guchar src = (guchar )SvPVbyte_nolen (src_sv);
506	root	1.2
507			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
508			dst = gdk_pixbuf_get_pixels (RETVAL);
509			dstr = gdk_pixbuf_get_rowstride (RETVAL);
510
511			for (y = 0; y < h; y++)
512			for (d = dst + y * dstr, x = 0; x < w; x++)
513			{
514	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
515			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
516			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
517	root	1.2
518			src++;
519			}
520	root	1.3	}
521			OUTPUT:
522			RETVAL
523
524	root	1.6	#############################################################################
525	root	1.4
526			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
527
528			void
529	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
530	root	1.4	CODE:
531			{
532			int w = gdk_pixbuf_get_width (pb);
533			int h = gdk_pixbuf_get_height (pb);
534			int x, y, i;
535			guchar *dst;
536	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
537	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
538			int sstr = gdk_pixbuf_get_rowstride (pb);
539
540			a85_init ();
541
542			for (y = 0; y < h; y++)
543			for (x = 0; x < w; x++)
544	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
545	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
546
547			a85_finish (fp);
548	root	1.7	}
549
550			void
551			dump_binary (PerlIO fp, GdkPixbuf pb)
552			CODE:
553			{
554			int w = gdk_pixbuf_get_width (pb);
555			int h = gdk_pixbuf_get_height (pb);
556			int x, y, i;
557			guchar *dst;
558			int bpp = gdk_pixbuf_get_n_channels (pb);
559			guchar *src = gdk_pixbuf_get_pixels (pb);
560			int sstr = gdk_pixbuf_get_rowstride (pb);
561
562			for (y = 0; y < h; y++)
563			for (x = 0; x < w; x++)
564			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
565			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
566	root	1.4	}
567	root	1.8
568			#############################################################################
569
570			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
571
572			SV *
573			pb_to_hv84 (GdkPixbuf *pb)
574			CODE:
575			{
576			int w = gdk_pixbuf_get_width (pb);
577			int h = gdk_pixbuf_get_height (pb);
578			int x, y;
579			guchar *dst;
580			int bpp = gdk_pixbuf_get_n_channels (pb);
581			guchar *src = gdk_pixbuf_get_pixels (pb);
582			int sstr = gdk_pixbuf_get_rowstride (pb);
583
584			RETVAL = newSV (6 * 8 * 12 / 8);
585			SvPOK_only (RETVAL);
586			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
587
588	root	1.25	dst = (guchar *)SvPVX (RETVAL);
589	root	1.8
590			/* some primitive error distribution + random dithering */
591
592			for (y = 0; y < h; y++)
593			{
594			guchar p = src + y sstr;
595
596			for (x = 0; x < w; x += 2)
597			{
598			unsigned int r, g, b, h, s, v, H, V1, V2;
599
600			if (bpp == 3)
601			r = p++, g = p++, b = *p++;
602			else if (bpp == 1)
603			r = g = b = *p++;
604			else
605			abort ();
606
607			rgb_to_hsv (r, g, b, &h, &s, &v);
608
609			H = (h * 15 / 255) << 4;
610			V1 = v;
611
612			if (bpp == 3)
613			r = p++, g = p++, b = *p++;
614			else if (bpp == 1)
615			r = g = b = *p++;
616			else
617			abort ();
618
619			rgb_to_hsv (r, g, b, &h, &s, &v);
620
621			H \|= h * 15 / 255;
622			V2 = v;
623
624			*dst++ = H;
625			*dst++ = V1;
626			*dst++ = V2;
627			}
628			}
629			}
630			OUTPUT:
631			RETVAL
632	root	1.4
633	root	1.9	SV *
634			hv84_to_av (unsigned char *hv84)
635			CODE:
636			{
637			int i = 72 / 3;
638			AV *av = newAV ();
639
640			RETVAL = (SV )newRV_noinc ((SV )av);
641			while (i--)
642			{
643			int h = *hv84++;
644			int v1 = *hv84++;
645			int v2 = *hv84++;
646
647			av_push (av, newSViv (v1));
648			av_push (av, newSViv ((h >> 4) * 255 / 15));
649			av_push (av, newSViv (v2));
650			av_push (av, newSViv ((h & 15) * 255 / 15));
651			}
652			}
653			OUTPUT:
654			RETVAL
655	root	1.2
656	root	1.20	#############################################################################
657
658			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
659
660			SV *
661	root	1.36	extract_features (SV *ar)
662			CODE:
663			{
664			int i;
665			AV av, result;
666
667			if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
668	root	1.39	croak ("Not an array ref as first argument to extract_features");
669	root	1.36
670			av = (AV *) SvRV (ar);
671			result = newAV ();
672
673			for (i = 0; i <= av_len (av); ++i)
674			{
675			SV sv = av_fetch (av, i, 1);
676			SV histsv = newSV (9 sizeof (float) + 1);
677
678			SvPOK_on (histsv);
679			SvCUR_set (histsv, 9 * sizeof (float));
680			float hist = (float )SvPVX (histsv);
681
682			struct feature f_h, f_s, f_v;
683			feature_init (&f_h);
684			feature_init (&f_s);
685			feature_init (&f_v);
686
687			{
688			STRLEN len;
689			unsigned char buf = (unsigned char )SvPVbyte (sv, len);
690			while (len >= 3)
691			{
692			unsigned int r, g, b, h, s, v;
693			r = buf++; g = buf++; b = *buf++;
694			rgb_to_hsv (r, g, b, &h, &s, &v);
695
696			feature_update_pass_1 (&f_h, h);
697			feature_update_pass_1 (&f_s, s);
698			feature_update_pass_1 (&f_v, v);
699
700			len -= 3;
701			}
702
703			feature_finish_pass_1 (&f_h);
704			feature_finish_pass_1 (&f_s);
705			feature_finish_pass_1 (&f_v);
706			}
707
708			{
709			STRLEN len;
710			unsigned char buf = (unsigned char )SvPVbyte (sv, len);
711			while (len >= 3)
712			{
713			unsigned int r, g, b, h, s, v;
714			r = buf++; g = buf++; b = *buf++;
715			rgb_to_hsv (r, g, b, &h, &s, &v);
716
717			feature_update_pass_2 (&f_h, h);
718			feature_update_pass_2 (&f_s, s);
719			feature_update_pass_2 (&f_v, v);
720
721			len -= 3;
722			}
723
724			feature_finish_pass_2 (&f_h);
725			feature_finish_pass_2 (&f_s);
726			feature_finish_pass_2 (&f_v);
727			}
728
729			hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
730			hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
731	root	1.38	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
732	root	1.36
733			av_push (result, histsv);
734			}
735
736			RETVAL = newRV_noinc ((SV *)result);
737			}
738			OUTPUT:
739			RETVAL
740