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"

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 (const char *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 (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/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

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 *
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:	1.40
Committed:	Sat Nov 25 15:00:51 2006 UTC (17 years, 5 months ago) by root
Branch:	MAIN
CVS Tags:	rel-1_5, rel-1_4, rel-1_51
Changes since 1.39:	+6 -1 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	1.17	struct jpg_err_mgr
29			{
30			struct jpeg_error_mgr err;
31			jmp_buf setjmp_buffer;
32			};
33
34			static void
35			cv_error_exit (j_common_ptr cinfo)
36			{
37			longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
38			}
39
40			static void
41			cv_error_output (j_common_ptr cinfo)
42			{
43			return;
44			}
45
46			static void
47			rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
48			unsigned int h, unsigned int s, unsigned int *v)
49			{
50			unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
51			unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
52			unsigned int delta = mx - mn;
53
54			*v = mx;
55
56			s = mx ? delta 255 / mx : 0;
57
58			if (delta == 0)
59			*h = 0;
60			else
61			{
62			if (r == mx)
63			h = ((int)g - (int)b) 255 / (int)(delta * 3);
64			else if (g == mx)
65			h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
66			else if (b == mx)
67			h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
68
69			*h &= 255;
70			}
71			}
72
73	root	1.36	struct feature {
74			float v1, v2, v3; // mean, square, cube
75			int n;
76			};
77
78			static void
79			feature_init (struct feature *f)
80			{
81			f->v1 = 0.;
82			f->v2 = 0.;
83			f->v3 = 0.;
84			f->n = 0;
85			}
86
87			// didn't find an algorithm to neatly do mean, variance and skew in one pass.
88			// elmex ist schuld.
89			static void
90			feature_update_pass_1 (struct feature *f, unsigned int v)
91			{
92			f->v1 += v;
93			f->n += 1;
94			}
95
96			static void
97			feature_finish_pass_1 (struct feature *f)
98			{
99			if (f->n < 1)
100			return;
101
102			f->v1 /= f->n;
103			}
104
105			static void
106			feature_update_pass_2 (struct feature *f, unsigned int v)
107			{
108			float d = v - f->v1;
109
110			f->v2 += d * d;
111			f->v3 += d * d * d;
112			}
113
114			static void
115			feature_finish_pass_2 (struct feature *f)
116			{
117			if (f->n < 1)
118			return;
119
120			f->v2 /= f->n;
121			f->v3 /= f->n;
122
123			f->v1 /= 255.;
124	root	1.37	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
125			f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
126	root	1.36	}
127
128	root	1.4	static guint32 a85_val;
129			static guint a85_cnt;
130	root	1.7	static guchar a85_buf[LINELENGTH], *a85_ptr;
131	root	1.4
132			static void
133			a85_init (void)
134			{
135			a85_cnt = 4;
136			a85_ptr = a85_buf;
137			}
138
139			static void
140			a85_push (PerlIO *fp, guchar c)
141			{
142			a85_val = a85_val << 8 \| c;
143
144			if (!--a85_cnt)
145			{
146			a85_cnt = 4;
147			if (a85_val)
148			{
149			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
150			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
151			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
152			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
153			a85_ptr[0] = (a85_val ) + 33;
154
155			a85_ptr += 5;
156			}
157			else
158			*a85_ptr++ = 'z';
159
160			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
161			{
162			*a85_ptr++ = '\n';
163			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
164			a85_ptr = a85_buf;
165			}
166			}
167
168			}
169
170	root	1.8	static void
171	root	1.4	a85_finish (PerlIO *fp)
172			{
173			while (a85_cnt != 4)
174			a85_push (fp, 0);
175
176			*a85_ptr++ = '~'; // probably buggy end-marker
177			*a85_ptr++ = '>'; // probably buggy end-marker
178			*a85_ptr++ = '\n';
179
180			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
181			}
182
183	root	1.6	/////////////////////////////////////////////////////////////////////////////
184
185	root	1.9	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
186	root	1.1
187			PROTOTYPES: ENABLE
188	root	1.2
189	root	1.29	# missing function in perl. really :)
190			int
191			common_prefix_length (a, b)
192			unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
193			unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
194			CODE:
195			RETVAL = 0;
196
197			while (a == b && *a)
198			{
199			RETVAL += (*a & 0xc0) != 0x80;
200			a++, b++;
201			}
202
203			OUTPUT:
204			RETVAL
205
206	root	1.31	const char *
207			magic (const char *path)
208			CODE:
209			{
210			static magic_t cookie;
211
212			if (!cookie)
213			{
214	root	1.32	cookie = magic_open (MAGIC_NONE);
215
216			if (cookie)
217			magic_load (cookie, 0);
218			else
219			XSRETURN_UNDEF;
220			}
221
222			RETVAL = magic_file (cookie, path);
223			}
224			OUTPUT:
225			RETVAL
226
227			const char *
228			magic_mime (const char *path)
229			CODE:
230			{
231			static magic_t cookie;
232
233			if (!cookie)
234			{
235	root	1.31	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			}
245			OUTPUT:
246			RETVAL
247
248	root	1.40	# missing/broken in Gtk2 perl module
249
250			void
251			gdk_window_clear_hints (GdkWindow *window)
252			CODE:
253			gdk_window_set_geometry_hints (window, 0, 0);
254	root	1.22
255			gboolean
256			gdk_net_wm_supports (GdkAtom property)
257			CODE:
258			#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
259			RETVAL = gdk_net_wm_supports (property);
260			#else
261			RETVAL = 0;
262			#endif
263			OUTPUT:
264			RETVAL
265
266	root	1.3	GdkPixbuf_noinc *
267	root	1.26	dealpha_expose (GdkPixbuf *pb)
268			CODE:
269			{
270			int w = gdk_pixbuf_get_width (pb);
271			int h = gdk_pixbuf_get_height (pb);
272			int bpp = gdk_pixbuf_get_n_channels (pb);
273			int x, y, i;
274			guchar src = gdk_pixbuf_get_pixels (pb), dst;
275			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
276
277			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
278
279			dst = gdk_pixbuf_get_pixels (RETVAL);
280			dstr = gdk_pixbuf_get_rowstride (RETVAL);
281
282			for (x = 0; x < w; x++)
283			for (y = 0; y < h; y++)
284			for (i = 0; i < 3; i++)
285			dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
286			}
287			OUTPUT:
288			RETVAL
289
290			GdkPixbuf_noinc *
291	root	1.28	rotate (GdkPixbuf *pb, int angle)
292	root	1.2	CODE:
293	root	1.28	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
294			: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
295			: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
296			: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
297			: angle);
298	root	1.2	OUTPUT:
299			RETVAL
300
301	root	1.17	GdkPixbuf_noinc *
302	root	1.23	load_jpeg (SV *path, int thumbnail=0)
303	root	1.17	CODE:
304			{
305			struct jpeg_decompress_struct cinfo;
306			struct jpg_err_mgr jerr;
307			guchar *data;
308			int rs;
309			FILE *fp;
310			volatile GdkPixbuf *pb = 0;
311	root	1.23
312	root	1.17	RETVAL = 0;
313
314	root	1.30	fp = fopen (SvPVbyte_nolen (path), "rb");
315	root	1.23
316			if (!fp)
317	root	1.17	XSRETURN_UNDEF;
318
319			cinfo.err = jpeg_std_error (&jerr.err);
320
321			jerr.err.error_exit = cv_error_exit;
322			jerr.err.output_message = cv_error_output;
323
324			if ((rs = setjmp (jerr.setjmp_buffer)))
325			{
326			fclose (fp);
327			jpeg_destroy_decompress (&cinfo);
328
329			if (pb)
330			g_object_unref ((gpointer)pb);
331
332			XSRETURN_UNDEF;
333			}
334
335			jpeg_create_decompress (&cinfo);
336
337			jpeg_stdio_src (&cinfo, fp);
338			jpeg_read_header (&cinfo, TRUE);
339
340			cinfo.dct_method = JDCT_DEFAULT;
341			cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
342			cinfo.do_block_smoothing = FALSE;
343			cinfo.out_color_space = JCS_RGB;
344			cinfo.quantize_colors = FALSE;
345
346			cinfo.scale_num = 1;
347			cinfo.scale_denom = 1;
348
349			jpeg_calc_output_dimensions (&cinfo);
350
351			if (thumbnail)
352			{
353			cinfo.dct_method = JDCT_FASTEST;
354			cinfo.do_fancy_upsampling = FALSE;
355
356			while (cinfo.scale_denom < 8
357	root	1.21	&& cinfo.output_width >= IW*4
358			&& cinfo.output_height >= IH*4)
359	root	1.17	{
360			cinfo.scale_denom <<= 1;
361			jpeg_calc_output_dimensions (&cinfo);
362			}
363			}
364
365			pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
366			if (!RETVAL)
367			longjmp (jerr.setjmp_buffer, 2);
368
369			data = gdk_pixbuf_get_pixels (RETVAL);
370			rs = gdk_pixbuf_get_rowstride (RETVAL);
371
372			if (cinfo.output_components != 3)
373			longjmp (jerr.setjmp_buffer, 3);
374
375			jpeg_start_decompress (&cinfo);
376
377			while (cinfo.output_scanline < cinfo.output_height)
378			{
379			int remaining = cinfo.output_height - cinfo.output_scanline;
380			JSAMPROW rp[4];
381
382			rp [0] = data + cinfo.output_scanline * rs;
383			rp [1] = (guchar *)rp [0] + rs;
384			rp [2] = (guchar *)rp [1] + rs;
385			rp [3] = (guchar *)rp [2] + rs;
386
387			jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
388			}
389
390			jpeg_finish_decompress (&cinfo);
391			fclose (fp);
392			jpeg_destroy_decompress (&cinfo);
393			}
394			OUTPUT:
395			RETVAL
396
397	root	1.33	void
398			compare (GdkPixbuf a, GdkPixbuf b)
399			PPCODE:
400			{
401			int w = gdk_pixbuf_get_width (a);
402			int h = gdk_pixbuf_get_height (a);
403			int sa = gdk_pixbuf_get_rowstride (a);
404			int sb = gdk_pixbuf_get_rowstride (b);
405
406			guchar *pa = gdk_pixbuf_get_pixels (a);
407			guchar *pb = gdk_pixbuf_get_pixels (b);
408
409			int x, y;
410
411			assert (w == gdk_pixbuf_get_width (b));
412			assert (h == gdk_pixbuf_get_height (b));
413
414			assert (gdk_pixbuf_get_n_channels (a) == 3);
415			assert (gdk_pixbuf_get_n_channels (b) == 3);
416
417			double diff = 0.;
418			int peak = 0;
419
420	root	1.35	if (w && h)
421	root	1.34	for (y = 0; y < h; y++)
422			{
423			guchar pa_ = pa + y sa;
424			guchar pb_ = pb + y sb;
425	root	1.33
426	root	1.34	for (x = 0; x < w; x++)
427			{
428			int d;
429
430			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
431			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));
433			}
434			}
435	root	1.33
436			EXTEND (SP, 2);
437			PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
438			PUSHs (sv_2mortal (newSVnv (peak / 255.)));
439			}
440
441	root	1.6	#############################################################################
442
443	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
444
445	root	1.18	SV *
446			foldcase (SV *pathsv)
447			PROTOTYPE: $
448			CODE:
449			{
450			STRLEN plen;
451	root	1.25	U8 path = (U8 )SvPVutf8 (pathsv, plen);
452	root	1.18	U8 *pend = path + plen;
453			U8 dst [plen * 6 * 3], *dstp = dst;
454
455			while (path < pend)
456			{
457	root	1.19	U8 ch = *path;
458
459			if (ch >= 'a' && ch <= 'z')
460			dstp++ = path++;
461			else if (ch >= '0' && ch <= '9')
462	root	1.18	{
463			STRLEN el, nl = 0;
464	root	1.19	while (path >= '0' && path <= '9' && path < pend)
465	root	1.18	path++, nl++;
466
467			for (el = nl; el < 6; el++)
468			*dstp++ = '0';
469
470			memcpy (dstp, path - nl, nl);
471			dstp += nl;
472			}
473			else
474			{
475			STRLEN cl;
476			to_utf8_fold (path, dstp, &cl);
477			dstp += cl;
478			path += is_utf8_char (path);
479			}
480			}
481
482	root	1.25	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
483	root	1.18	}
484			OUTPUT:
485			RETVAL
486
487	root	1.3	GdkPixbuf_noinc *
488	root	1.24	p7_to_pb (int w, int h, SV *src_sv)
489	root	1.21	PROTOTYPE: @
490	root	1.2	CODE:
491			{
492			int x, y;
493			guchar dst, d;
494			int dstr;
495	root	1.25	guchar src = (guchar )SvPVbyte_nolen (src_sv);
496	root	1.2
497			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
498			dst = gdk_pixbuf_get_pixels (RETVAL);
499			dstr = gdk_pixbuf_get_rowstride (RETVAL);
500
501			for (y = 0; y < h; y++)
502			for (d = dst + y * dstr, x = 0; x < w; x++)
503			{
504	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
505			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
506			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
507	root	1.2
508			src++;
509			}
510	root	1.3	}
511			OUTPUT:
512			RETVAL
513
514	root	1.6	#############################################################################
515	root	1.4
516			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
517
518			void
519	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
520	root	1.4	CODE:
521			{
522			int w = gdk_pixbuf_get_width (pb);
523			int h = gdk_pixbuf_get_height (pb);
524			int x, y, i;
525			guchar *dst;
526	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
527	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
528			int sstr = gdk_pixbuf_get_rowstride (pb);
529
530			a85_init ();
531
532			for (y = 0; y < h; y++)
533			for (x = 0; x < w; x++)
534	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
535	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
536
537			a85_finish (fp);
538	root	1.7	}
539
540			void
541			dump_binary (PerlIO fp, GdkPixbuf pb)
542			CODE:
543			{
544			int w = gdk_pixbuf_get_width (pb);
545			int h = gdk_pixbuf_get_height (pb);
546			int x, y, i;
547			guchar *dst;
548			int bpp = gdk_pixbuf_get_n_channels (pb);
549			guchar *src = gdk_pixbuf_get_pixels (pb);
550			int sstr = gdk_pixbuf_get_rowstride (pb);
551
552			for (y = 0; y < h; y++)
553			for (x = 0; x < w; x++)
554			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
555			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
556	root	1.4	}
557	root	1.8
558			#############################################################################
559
560			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
561
562			SV *
563			pb_to_hv84 (GdkPixbuf *pb)
564			CODE:
565			{
566			int w = gdk_pixbuf_get_width (pb);
567			int h = gdk_pixbuf_get_height (pb);
568			int x, y;
569			guchar *dst;
570			int bpp = gdk_pixbuf_get_n_channels (pb);
571			guchar *src = gdk_pixbuf_get_pixels (pb);
572			int sstr = gdk_pixbuf_get_rowstride (pb);
573
574			RETVAL = newSV (6 * 8 * 12 / 8);
575			SvPOK_only (RETVAL);
576			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
577
578	root	1.25	dst = (guchar *)SvPVX (RETVAL);
579	root	1.8
580			/* some primitive error distribution + random dithering */
581
582			for (y = 0; y < h; y++)
583			{
584			guchar p = src + y sstr;
585
586			for (x = 0; x < w; x += 2)
587			{
588			unsigned int r, g, b, h, s, v, H, V1, V2;
589
590			if (bpp == 3)
591			r = p++, g = p++, b = *p++;
592			else if (bpp == 1)
593			r = g = b = *p++;
594			else
595			abort ();
596
597			rgb_to_hsv (r, g, b, &h, &s, &v);
598
599			H = (h * 15 / 255) << 4;
600			V1 = v;
601
602			if (bpp == 3)
603			r = p++, g = p++, b = *p++;
604			else if (bpp == 1)
605			r = g = b = *p++;
606			else
607			abort ();
608
609			rgb_to_hsv (r, g, b, &h, &s, &v);
610
611			H \|= h * 15 / 255;
612			V2 = v;
613
614			*dst++ = H;
615			*dst++ = V1;
616			*dst++ = V2;
617			}
618			}
619			}
620			OUTPUT:
621			RETVAL
622	root	1.4
623	root	1.9	SV *
624			hv84_to_av (unsigned char *hv84)
625			CODE:
626			{
627			int i = 72 / 3;
628			AV *av = newAV ();
629
630			RETVAL = (SV )newRV_noinc ((SV )av);
631			while (i--)
632			{
633			int h = *hv84++;
634			int v1 = *hv84++;
635			int v2 = *hv84++;
636
637			av_push (av, newSViv (v1));
638			av_push (av, newSViv ((h >> 4) * 255 / 15));
639			av_push (av, newSViv (v2));
640			av_push (av, newSViv ((h & 15) * 255 / 15));
641			}
642			}
643			OUTPUT:
644			RETVAL
645	root	1.2
646	root	1.20	#############################################################################
647
648			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
649
650			SV *
651	root	1.36	extract_features (SV *ar)
652			CODE:
653			{
654			int i;
655			AV av, result;
656
657			if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
658	root	1.39	croak ("Not an array ref as first argument to extract_features");
659	root	1.36
660			av = (AV *) SvRV (ar);
661			result = newAV ();
662
663			for (i = 0; i <= av_len (av); ++i)
664			{
665			SV sv = av_fetch (av, i, 1);
666			SV histsv = newSV (9 sizeof (float) + 1);
667
668			SvPOK_on (histsv);
669			SvCUR_set (histsv, 9 * sizeof (float));
670			float hist = (float )SvPVX (histsv);
671
672			struct feature f_h, f_s, f_v;
673			feature_init (&f_h);
674			feature_init (&f_s);
675			feature_init (&f_v);
676
677			{
678			STRLEN len;
679			unsigned char buf = (unsigned char )SvPVbyte (sv, len);
680			while (len >= 3)
681			{
682			unsigned int r, g, b, h, s, v;
683			r = buf++; g = buf++; b = *buf++;
684			rgb_to_hsv (r, g, b, &h, &s, &v);
685
686			feature_update_pass_1 (&f_h, h);
687			feature_update_pass_1 (&f_s, s);
688			feature_update_pass_1 (&f_v, v);
689
690			len -= 3;
691			}
692
693			feature_finish_pass_1 (&f_h);
694			feature_finish_pass_1 (&f_s);
695			feature_finish_pass_1 (&f_v);
696			}
697
698			{
699			STRLEN len;
700			unsigned char buf = (unsigned char )SvPVbyte (sv, len);
701			while (len >= 3)
702			{
703			unsigned int r, g, b, h, s, v;
704			r = buf++; g = buf++; b = *buf++;
705			rgb_to_hsv (r, g, b, &h, &s, &v);
706
707			feature_update_pass_2 (&f_h, h);
708			feature_update_pass_2 (&f_s, s);
709			feature_update_pass_2 (&f_v, v);
710
711			len -= 3;
712			}
713
714			feature_finish_pass_2 (&f_h);
715			feature_finish_pass_2 (&f_s);
716			feature_finish_pass_2 (&f_v);
717			}
718
719			hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
720			hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
721	root	1.38	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
722	root	1.36
723			av_push (result, histsv);
724			}
725
726			RETVAL = newRV_noinc ((SV *)result);
727			}
728			OUTPUT:
729			RETVAL
730