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;
    }
}

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 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

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 (x && y)
          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 *
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:	1.34
Committed:	Tue Mar 7 16:26:25 2006 UTC (18 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.33:	+14 -13 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	1.4	static guint32 a85_val;
74			static guint a85_cnt;
75	root	1.7	static guchar a85_buf[LINELENGTH], *a85_ptr;
76	root	1.4
77			static void
78			a85_init (void)
79			{
80			a85_cnt = 4;
81			a85_ptr = a85_buf;
82			}
83
84			static void
85			a85_push (PerlIO *fp, guchar c)
86			{
87			a85_val = a85_val << 8 \| c;
88
89			if (!--a85_cnt)
90			{
91			a85_cnt = 4;
92			if (a85_val)
93			{
94			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
95			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
96			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
97			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
98			a85_ptr[0] = (a85_val ) + 33;
99
100			a85_ptr += 5;
101			}
102			else
103			*a85_ptr++ = 'z';
104
105			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
106			{
107			*a85_ptr++ = '\n';
108			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
109			a85_ptr = a85_buf;
110			}
111			}
112
113			}
114
115	root	1.8	static void
116	root	1.4	a85_finish (PerlIO *fp)
117			{
118			while (a85_cnt != 4)
119			a85_push (fp, 0);
120
121			*a85_ptr++ = '~'; // probably buggy end-marker
122			*a85_ptr++ = '>'; // probably buggy end-marker
123			*a85_ptr++ = '\n';
124
125			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
126			}
127
128	root	1.6	/////////////////////////////////////////////////////////////////////////////
129
130	root	1.9	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
131	root	1.1
132			PROTOTYPES: ENABLE
133	root	1.2
134	root	1.29	# missing function in perl. really :)
135			int
136			common_prefix_length (a, b)
137			unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
138			unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
139			CODE:
140			RETVAL = 0;
141
142			while (a == b && *a)
143			{
144			RETVAL += (*a & 0xc0) != 0x80;
145			a++, b++;
146			}
147
148			OUTPUT:
149			RETVAL
150
151	root	1.31	const char *
152			magic (const char *path)
153			CODE:
154			{
155			static magic_t cookie;
156
157			if (!cookie)
158			{
159	root	1.32	cookie = magic_open (MAGIC_NONE);
160
161			if (cookie)
162			magic_load (cookie, 0);
163			else
164			XSRETURN_UNDEF;
165			}
166
167			RETVAL = magic_file (cookie, path);
168			}
169			OUTPUT:
170			RETVAL
171
172			const char *
173			magic_mime (const char *path)
174			CODE:
175			{
176			static magic_t cookie;
177
178			if (!cookie)
179			{
180	root	1.31	cookie = magic_open (MAGIC_MIME);
181
182			if (cookie)
183			magic_load (cookie, 0);
184			else
185			XSRETURN_UNDEF;
186			}
187
188			RETVAL = magic_file (cookie, path);
189			}
190			OUTPUT:
191			RETVAL
192
193	root	1.22	# missing in Gtk2 perl module
194
195			gboolean
196			gdk_net_wm_supports (GdkAtom property)
197			CODE:
198			#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
199			RETVAL = gdk_net_wm_supports (property);
200			#else
201			RETVAL = 0;
202			#endif
203			OUTPUT:
204			RETVAL
205
206	root	1.3	GdkPixbuf_noinc *
207	root	1.26	dealpha_expose (GdkPixbuf *pb)
208			CODE:
209			{
210			int w = gdk_pixbuf_get_width (pb);
211			int h = gdk_pixbuf_get_height (pb);
212			int bpp = gdk_pixbuf_get_n_channels (pb);
213			int x, y, i;
214			guchar src = gdk_pixbuf_get_pixels (pb), dst;
215			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
216
217			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
218
219			dst = gdk_pixbuf_get_pixels (RETVAL);
220			dstr = gdk_pixbuf_get_rowstride (RETVAL);
221
222			for (x = 0; x < w; x++)
223			for (y = 0; y < h; y++)
224			for (i = 0; i < 3; i++)
225			dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
226			}
227			OUTPUT:
228			RETVAL
229
230			GdkPixbuf_noinc *
231	root	1.28	rotate (GdkPixbuf *pb, int angle)
232	root	1.2	CODE:
233	root	1.28	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
234			: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
235			: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
236			: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
237			: angle);
238	root	1.2	OUTPUT:
239			RETVAL
240
241	root	1.17	GdkPixbuf_noinc *
242	root	1.23	load_jpeg (SV *path, int thumbnail=0)
243	root	1.17	CODE:
244			{
245			struct jpeg_decompress_struct cinfo;
246			struct jpg_err_mgr jerr;
247			guchar *data;
248			int rs;
249			FILE *fp;
250			volatile GdkPixbuf *pb = 0;
251	root	1.23
252	root	1.17	RETVAL = 0;
253
254	root	1.30	fp = fopen (SvPVbyte_nolen (path), "rb");
255	root	1.23
256			if (!fp)
257	root	1.17	XSRETURN_UNDEF;
258
259			cinfo.err = jpeg_std_error (&jerr.err);
260
261			jerr.err.error_exit = cv_error_exit;
262			jerr.err.output_message = cv_error_output;
263
264			if ((rs = setjmp (jerr.setjmp_buffer)))
265			{
266			fclose (fp);
267			jpeg_destroy_decompress (&cinfo);
268
269			if (pb)
270			g_object_unref ((gpointer)pb);
271
272			XSRETURN_UNDEF;
273			}
274
275			jpeg_create_decompress (&cinfo);
276
277			jpeg_stdio_src (&cinfo, fp);
278			jpeg_read_header (&cinfo, TRUE);
279
280			cinfo.dct_method = JDCT_DEFAULT;
281			cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
282			cinfo.do_block_smoothing = FALSE;
283			cinfo.out_color_space = JCS_RGB;
284			cinfo.quantize_colors = FALSE;
285
286			cinfo.scale_num = 1;
287			cinfo.scale_denom = 1;
288
289			jpeg_calc_output_dimensions (&cinfo);
290
291			if (thumbnail)
292			{
293			cinfo.dct_method = JDCT_FASTEST;
294			cinfo.do_fancy_upsampling = FALSE;
295
296			while (cinfo.scale_denom < 8
297	root	1.21	&& cinfo.output_width >= IW*4
298			&& cinfo.output_height >= IH*4)
299	root	1.17	{
300			cinfo.scale_denom <<= 1;
301			jpeg_calc_output_dimensions (&cinfo);
302			}
303			}
304
305			pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
306			if (!RETVAL)
307			longjmp (jerr.setjmp_buffer, 2);
308
309			data = gdk_pixbuf_get_pixels (RETVAL);
310			rs = gdk_pixbuf_get_rowstride (RETVAL);
311
312			if (cinfo.output_components != 3)
313			longjmp (jerr.setjmp_buffer, 3);
314
315			jpeg_start_decompress (&cinfo);
316
317			while (cinfo.output_scanline < cinfo.output_height)
318			{
319			int remaining = cinfo.output_height - cinfo.output_scanline;
320			JSAMPROW rp[4];
321
322			rp [0] = data + cinfo.output_scanline * rs;
323			rp [1] = (guchar *)rp [0] + rs;
324			rp [2] = (guchar *)rp [1] + rs;
325			rp [3] = (guchar *)rp [2] + rs;
326
327			jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
328			}
329
330			jpeg_finish_decompress (&cinfo);
331			fclose (fp);
332			jpeg_destroy_decompress (&cinfo);
333			}
334			OUTPUT:
335			RETVAL
336
337	root	1.33	void
338			compare (GdkPixbuf a, GdkPixbuf b)
339			PPCODE:
340			{
341			int w = gdk_pixbuf_get_width (a);
342			int h = gdk_pixbuf_get_height (a);
343			int sa = gdk_pixbuf_get_rowstride (a);
344			int sb = gdk_pixbuf_get_rowstride (b);
345
346			guchar *pa = gdk_pixbuf_get_pixels (a);
347			guchar *pb = gdk_pixbuf_get_pixels (b);
348
349			int x, y;
350
351			assert (w == gdk_pixbuf_get_width (b));
352			assert (h == gdk_pixbuf_get_height (b));
353
354			assert (gdk_pixbuf_get_n_channels (a) == 3);
355			assert (gdk_pixbuf_get_n_channels (b) == 3);
356
357			double diff = 0.;
358			int peak = 0;
359
360	root	1.34	if (x && y)
361			for (y = 0; y < h; y++)
362			{
363			guchar pa_ = pa + y sa;
364			guchar pb_ = pb + y sb;
365	root	1.33
366	root	1.34	for (x = 0; x < w; x++)
367			{
368			int d;
369
370			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
371			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
372			d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
373			}
374			}
375	root	1.33
376			EXTEND (SP, 2);
377			PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
378			PUSHs (sv_2mortal (newSVnv (peak / 255.)));
379			}
380
381	root	1.6	#############################################################################
382
383	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
384
385	root	1.18	SV *
386			foldcase (SV *pathsv)
387			PROTOTYPE: $
388			CODE:
389			{
390			STRLEN plen;
391	root	1.25	U8 path = (U8 )SvPVutf8 (pathsv, plen);
392	root	1.18	U8 *pend = path + plen;
393			U8 dst [plen * 6 * 3], *dstp = dst;
394
395			while (path < pend)
396			{
397	root	1.19	U8 ch = *path;
398
399			if (ch >= 'a' && ch <= 'z')
400			dstp++ = path++;
401			else if (ch >= '0' && ch <= '9')
402	root	1.18	{
403			STRLEN el, nl = 0;
404	root	1.19	while (path >= '0' && path <= '9' && path < pend)
405	root	1.18	path++, nl++;
406
407			for (el = nl; el < 6; el++)
408			*dstp++ = '0';
409
410			memcpy (dstp, path - nl, nl);
411			dstp += nl;
412			}
413			else
414			{
415			STRLEN cl;
416			to_utf8_fold (path, dstp, &cl);
417			dstp += cl;
418			path += is_utf8_char (path);
419			}
420			}
421
422	root	1.25	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
423	root	1.18	}
424			OUTPUT:
425			RETVAL
426
427	root	1.3	GdkPixbuf_noinc *
428	root	1.24	p7_to_pb (int w, int h, SV *src_sv)
429	root	1.21	PROTOTYPE: @
430	root	1.2	CODE:
431			{
432			int x, y;
433			guchar dst, d;
434			int dstr;
435	root	1.25	guchar src = (guchar )SvPVbyte_nolen (src_sv);
436	root	1.2
437			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
438			dst = gdk_pixbuf_get_pixels (RETVAL);
439			dstr = gdk_pixbuf_get_rowstride (RETVAL);
440
441			for (y = 0; y < h; y++)
442			for (d = dst + y * dstr, x = 0; x < w; x++)
443			{
444	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
445			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
446			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
447	root	1.2
448			src++;
449			}
450	root	1.3	}
451			OUTPUT:
452			RETVAL
453
454	root	1.6	#############################################################################
455	root	1.4
456			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
457
458			void
459	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
460	root	1.4	CODE:
461			{
462			int w = gdk_pixbuf_get_width (pb);
463			int h = gdk_pixbuf_get_height (pb);
464			int x, y, i;
465			guchar *dst;
466	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
467	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
468			int sstr = gdk_pixbuf_get_rowstride (pb);
469
470			a85_init ();
471
472			for (y = 0; y < h; y++)
473			for (x = 0; x < w; x++)
474	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
475	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
476
477			a85_finish (fp);
478	root	1.7	}
479
480			void
481			dump_binary (PerlIO fp, GdkPixbuf pb)
482			CODE:
483			{
484			int w = gdk_pixbuf_get_width (pb);
485			int h = gdk_pixbuf_get_height (pb);
486			int x, y, i;
487			guchar *dst;
488			int bpp = gdk_pixbuf_get_n_channels (pb);
489			guchar *src = gdk_pixbuf_get_pixels (pb);
490			int sstr = gdk_pixbuf_get_rowstride (pb);
491
492			for (y = 0; y < h; y++)
493			for (x = 0; x < w; x++)
494			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
495			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
496	root	1.4	}
497	root	1.8
498			#############################################################################
499
500			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
501
502			SV *
503			pb_to_hv84 (GdkPixbuf *pb)
504			CODE:
505			{
506			int w = gdk_pixbuf_get_width (pb);
507			int h = gdk_pixbuf_get_height (pb);
508			int x, y;
509			guchar *dst;
510			int bpp = gdk_pixbuf_get_n_channels (pb);
511			guchar *src = gdk_pixbuf_get_pixels (pb);
512			int sstr = gdk_pixbuf_get_rowstride (pb);
513
514			RETVAL = newSV (6 * 8 * 12 / 8);
515			SvPOK_only (RETVAL);
516			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
517
518	root	1.25	dst = (guchar *)SvPVX (RETVAL);
519	root	1.8
520			/* some primitive error distribution + random dithering */
521
522			for (y = 0; y < h; y++)
523			{
524			guchar p = src + y sstr;
525
526			for (x = 0; x < w; x += 2)
527			{
528			unsigned int r, g, b, h, s, v, H, V1, V2;
529
530			if (bpp == 3)
531			r = p++, g = p++, b = *p++;
532			else if (bpp == 1)
533			r = g = b = *p++;
534			else
535			abort ();
536
537			rgb_to_hsv (r, g, b, &h, &s, &v);
538
539			H = (h * 15 / 255) << 4;
540			V1 = v;
541
542			if (bpp == 3)
543			r = p++, g = p++, b = *p++;
544			else if (bpp == 1)
545			r = g = b = *p++;
546			else
547			abort ();
548
549			rgb_to_hsv (r, g, b, &h, &s, &v);
550
551			H \|= h * 15 / 255;
552			V2 = v;
553
554			*dst++ = H;
555			*dst++ = V1;
556			*dst++ = V2;
557			}
558			}
559			}
560			OUTPUT:
561			RETVAL
562	root	1.4
563	root	1.9	SV *
564			hv84_to_av (unsigned char *hv84)
565			CODE:
566			{
567			int i = 72 / 3;
568			AV *av = newAV ();
569
570			RETVAL = (SV )newRV_noinc ((SV )av);
571			while (i--)
572			{
573			int h = *hv84++;
574			int v1 = *hv84++;
575			int v2 = *hv84++;
576
577			av_push (av, newSViv (v1));
578			av_push (av, newSViv ((h >> 4) * 255 / 15));
579			av_push (av, newSViv (v2));
580			av_push (av, newSViv ((h & 15) * 255 / 15));
581			}
582			}
583			OUTPUT:
584			RETVAL
585	root	1.2
586	root	1.20	#############################################################################
587
588			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
589
590			SV *
591			make_histograms (SV *ar)
592			CODE:
593			{
594			int i;
595			AV av, result;
596
597			if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
598			croak ("Not an array ref as first argument to make_histogram");
599
600			av = (AV *) SvRV (ar);
601			result = newAV ();
602
603			for (i = 0; i <= av_len (av); ++i)
604			{
605			const int HISTSIZE = 64;
606
607			int j;
608			SV sv = av_fetch (av, i, 1);
609			STRLEN len;
610			char *buf = SvPVbyte (sv, len);
611
612			int tmphist[HISTSIZE];
613			float *hist;
614
615			SV histsv = newSV (HISTSIZE sizeof (float) + 1);
616			SvPOK_on (histsv);
617			SvCUR_set (histsv, HISTSIZE * sizeof (float));
618			hist = (float *)SvPVX (histsv);
619
620			Zero (tmphist, sizeof (tmphist), char);
621
622			for (j = len; j--; )
623			{
624			unsigned int idx
625			= ((*buf & 0xc0) >> 2)
626			\| ((*buf & 0x18) >> 1)
627			\| (*buf & 0x03);
628
629			++tmphist[idx];
630			++buf;
631			}
632
633			for (j = 0; j < HISTSIZE; ++j)
634			hist[j] = (float)tmphist[j] / (len + 1e-30);
635
636			av_push (result, histsv);
637			}
638
639			RETVAL = newRV_noinc ((SV *)result);
640			}
641			OUTPUT:
642			RETVAL
643	root	1.1
644