CV/CV.xs

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

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

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

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

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

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

#define LINELENGTH 240

#define ELLIPSIS "\xe2\x80\xa6"

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

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

static void
cv_error_output (j_common_ptr cinfo)
{
  return;
}

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

  *v = mx;

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

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

      *h &= 255;
    }
}

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

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

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

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

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

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

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

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

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

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

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

PROTOTYPES: ENABLE

# missing 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;
        gchar *filename;

        RETVAL = 0;

        filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);
        fp = fopen (filename, "rb");
        g_free (filename);

        if (!fp)
          XSRETURN_UNDEF;

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

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

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

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

            XSRETURN_UNDEF;
          }

        jpeg_create_decompress (&cinfo);

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

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

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

        jpeg_calc_output_dimensions (&cinfo);

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

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

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

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

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

        jpeg_start_decompress (&cinfo);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

              src++;
            }
}
        OUTPUT:
        RETVAL

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

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

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

        a85_init ();

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

        a85_finish (fp);
}

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

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

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

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

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

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

        dst = (guchar *)SvPVX (RETVAL);

        /* some primitive error distribution + random dithering */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

            int tmphist[HISTSIZE];
            float *hist;

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

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

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

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

            av_push (result, histsv);
          }

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


Revision:	1.28
Committed:	Mon Aug 22 00:30:58 2005 UTC (18 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.27:	+6 -101 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5	root	1.18	#include <string.h>
6	root	1.17	#include <setjmp.h>
7
8			#include <jpeglib.h>
9	root	1.23	#include <glib.h>
10			#include <gtk/gtk.h>
11	root	1.2	#include <gdk-pixbuf/gdk-pixbuf.h>
12
13			#include <gperl.h>
14			#include <gtk2perl.h>
15
16	root	1.17	#define IW 80 /* MUST match Schnauer.pm! */
17			#define IH 60 /* MUST match Schnauer.pm! */
18	root	1.5
19			#define RAND (seed = (seed + 7141) * 54773 % 134456)
20
21	root	1.7	#define LINELENGTH 240
22
23	root	1.6	#define ELLIPSIS "\xe2\x80\xa6"
24
25	root	1.17	struct jpg_err_mgr
26			{
27			struct jpeg_error_mgr err;
28			jmp_buf setjmp_buffer;
29			};
30
31			static void
32			cv_error_exit (j_common_ptr cinfo)
33			{
34			longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35			}
36
37			static void
38			cv_error_output (j_common_ptr cinfo)
39			{
40			return;
41			}
42
43			static void
44			rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
45			unsigned int h, unsigned int s, unsigned int *v)
46			{
47			unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
48			unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
49			unsigned int delta = mx - mn;
50
51			*v = mx;
52
53			s = mx ? delta 255 / mx : 0;
54
55			if (delta == 0)
56			*h = 0;
57			else
58			{
59			if (r == mx)
60			h = ((int)g - (int)b) 255 / (int)(delta * 3);
61			else if (g == mx)
62			h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
63			else if (b == mx)
64			h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
65
66			*h &= 255;
67			}
68			}
69
70	root	1.4	static guint32 a85_val;
71			static guint a85_cnt;
72	root	1.7	static guchar a85_buf[LINELENGTH], *a85_ptr;
73	root	1.4
74			static void
75			a85_init (void)
76			{
77			a85_cnt = 4;
78			a85_ptr = a85_buf;
79			}
80
81			static void
82			a85_push (PerlIO *fp, guchar c)
83			{
84			a85_val = a85_val << 8 \| c;
85
86			if (!--a85_cnt)
87			{
88			a85_cnt = 4;
89			if (a85_val)
90			{
91			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95			a85_ptr[0] = (a85_val ) + 33;
96
97			a85_ptr += 5;
98			}
99			else
100			*a85_ptr++ = 'z';
101
102			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
103			{
104			*a85_ptr++ = '\n';
105			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
106			a85_ptr = a85_buf;
107			}
108			}
109
110			}
111
112	root	1.8	static void
113	root	1.4	a85_finish (PerlIO *fp)
114			{
115			while (a85_cnt != 4)
116			a85_push (fp, 0);
117
118			*a85_ptr++ = '~'; // probably buggy end-marker
119			*a85_ptr++ = '>'; // probably buggy end-marker
120			*a85_ptr++ = '\n';
121
122			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
123			}
124
125	root	1.6	/////////////////////////////////////////////////////////////////////////////
126
127	root	1.9	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128	root	1.1
129			PROTOTYPES: ENABLE
130	root	1.2
131	root	1.22	# missing in Gtk2 perl module
132
133			gboolean
134			gdk_net_wm_supports (GdkAtom property)
135			CODE:
136			#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
137			RETVAL = gdk_net_wm_supports (property);
138			#else
139			RETVAL = 0;
140			#endif
141			OUTPUT:
142			RETVAL
143
144	root	1.3	GdkPixbuf_noinc *
145	root	1.26	dealpha_expose (GdkPixbuf *pb)
146			CODE:
147			{
148			int w = gdk_pixbuf_get_width (pb);
149			int h = gdk_pixbuf_get_height (pb);
150			int bpp = gdk_pixbuf_get_n_channels (pb);
151			int x, y, i;
152			guchar src = gdk_pixbuf_get_pixels (pb), dst;
153			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
154
155			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
156
157			dst = gdk_pixbuf_get_pixels (RETVAL);
158			dstr = gdk_pixbuf_get_rowstride (RETVAL);
159
160			for (x = 0; x < w; x++)
161			for (y = 0; y < h; y++)
162			for (i = 0; i < 3; i++)
163			dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
164			}
165			OUTPUT:
166			RETVAL
167
168			GdkPixbuf_noinc *
169	root	1.28	rotate (GdkPixbuf *pb, int angle)
170	root	1.2	CODE:
171	root	1.28	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
172			: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
173			: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
174			: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
175			: angle);
176	root	1.2	OUTPUT:
177			RETVAL
178
179	root	1.17	GdkPixbuf_noinc *
180	root	1.23	load_jpeg (SV *path, int thumbnail=0)
181	root	1.17	CODE:
182			{
183			struct jpeg_decompress_struct cinfo;
184			struct jpg_err_mgr jerr;
185			guchar *data;
186			int rs;
187			FILE *fp;
188			volatile GdkPixbuf *pb = 0;
189	root	1.23	gchar *filename;
190
191	root	1.17	RETVAL = 0;
192
193	root	1.23	filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);
194			fp = fopen (filename, "rb");
195			g_free (filename);
196
197			if (!fp)
198	root	1.17	XSRETURN_UNDEF;
199
200			cinfo.err = jpeg_std_error (&jerr.err);
201
202			jerr.err.error_exit = cv_error_exit;
203			jerr.err.output_message = cv_error_output;
204
205			if ((rs = setjmp (jerr.setjmp_buffer)))
206			{
207			fclose (fp);
208			jpeg_destroy_decompress (&cinfo);
209
210			if (pb)
211			g_object_unref ((gpointer)pb);
212
213			XSRETURN_UNDEF;
214			}
215
216			jpeg_create_decompress (&cinfo);
217
218			jpeg_stdio_src (&cinfo, fp);
219			jpeg_read_header (&cinfo, TRUE);
220
221			cinfo.dct_method = JDCT_DEFAULT;
222			cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
223			cinfo.do_block_smoothing = FALSE;
224			cinfo.out_color_space = JCS_RGB;
225			cinfo.quantize_colors = FALSE;
226
227			cinfo.scale_num = 1;
228			cinfo.scale_denom = 1;
229
230			jpeg_calc_output_dimensions (&cinfo);
231
232			if (thumbnail)
233			{
234			cinfo.dct_method = JDCT_FASTEST;
235			cinfo.do_fancy_upsampling = FALSE;
236
237			while (cinfo.scale_denom < 8
238	root	1.21	&& cinfo.output_width >= IW*4
239			&& cinfo.output_height >= IH*4)
240	root	1.17	{
241			cinfo.scale_denom <<= 1;
242			jpeg_calc_output_dimensions (&cinfo);
243			}
244			}
245
246			pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
247			if (!RETVAL)
248			longjmp (jerr.setjmp_buffer, 2);
249
250			data = gdk_pixbuf_get_pixels (RETVAL);
251			rs = gdk_pixbuf_get_rowstride (RETVAL);
252
253			if (cinfo.output_components != 3)
254			longjmp (jerr.setjmp_buffer, 3);
255
256			jpeg_start_decompress (&cinfo);
257
258			while (cinfo.output_scanline < cinfo.output_height)
259			{
260			int remaining = cinfo.output_height - cinfo.output_scanline;
261			JSAMPROW rp[4];
262
263			rp [0] = data + cinfo.output_scanline * rs;
264			rp [1] = (guchar *)rp [0] + rs;
265			rp [2] = (guchar *)rp [1] + rs;
266			rp [3] = (guchar *)rp [2] + rs;
267
268			jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
269			}
270
271			jpeg_finish_decompress (&cinfo);
272			fclose (fp);
273			jpeg_destroy_decompress (&cinfo);
274			}
275			OUTPUT:
276			RETVAL
277
278	root	1.6	#############################################################################
279
280	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
281
282	root	1.18	SV *
283			foldcase (SV *pathsv)
284			PROTOTYPE: $
285			CODE:
286			{
287			STRLEN plen;
288	root	1.25	U8 path = (U8 )SvPVutf8 (pathsv, plen);
289	root	1.18	U8 *pend = path + plen;
290			U8 dst [plen * 6 * 3], *dstp = dst;
291
292			while (path < pend)
293			{
294	root	1.19	U8 ch = *path;
295
296			if (ch >= 'a' && ch <= 'z')
297			dstp++ = path++;
298			else if (ch >= '0' && ch <= '9')
299	root	1.18	{
300			STRLEN el, nl = 0;
301	root	1.19	while (path >= '0' && path <= '9' && path < pend)
302	root	1.18	path++, nl++;
303
304			for (el = nl; el < 6; el++)
305			*dstp++ = '0';
306
307			memcpy (dstp, path - nl, nl);
308			dstp += nl;
309			}
310			else
311			{
312			STRLEN cl;
313			to_utf8_fold (path, dstp, &cl);
314			dstp += cl;
315			path += is_utf8_char (path);
316			}
317			}
318
319	root	1.25	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
320	root	1.18	}
321			OUTPUT:
322			RETVAL
323
324	root	1.3	GdkPixbuf_noinc *
325	root	1.24	p7_to_pb (int w, int h, SV *src_sv)
326	root	1.21	PROTOTYPE: @
327	root	1.2	CODE:
328			{
329			int x, y;
330			guchar dst, d;
331			int dstr;
332	root	1.25	guchar src = (guchar )SvPVbyte_nolen (src_sv);
333	root	1.2
334			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
335			dst = gdk_pixbuf_get_pixels (RETVAL);
336			dstr = gdk_pixbuf_get_rowstride (RETVAL);
337
338			for (y = 0; y < h; y++)
339			for (d = dst + y * dstr, x = 0; x < w; x++)
340			{
341	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
342			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
343			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
344	root	1.2
345			src++;
346			}
347	root	1.3	}
348			OUTPUT:
349			RETVAL
350
351	root	1.6	#############################################################################
352	root	1.4
353			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
354
355			void
356	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
357	root	1.4	CODE:
358			{
359			int w = gdk_pixbuf_get_width (pb);
360			int h = gdk_pixbuf_get_height (pb);
361			int x, y, i;
362			guchar *dst;
363	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
364	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
365			int sstr = gdk_pixbuf_get_rowstride (pb);
366
367			a85_init ();
368
369			for (y = 0; y < h; y++)
370			for (x = 0; x < w; x++)
371	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
372	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
373
374			a85_finish (fp);
375	root	1.7	}
376
377			void
378			dump_binary (PerlIO fp, GdkPixbuf pb)
379			CODE:
380			{
381			int w = gdk_pixbuf_get_width (pb);
382			int h = gdk_pixbuf_get_height (pb);
383			int x, y, i;
384			guchar *dst;
385			int bpp = gdk_pixbuf_get_n_channels (pb);
386			guchar *src = gdk_pixbuf_get_pixels (pb);
387			int sstr = gdk_pixbuf_get_rowstride (pb);
388
389			for (y = 0; y < h; y++)
390			for (x = 0; x < w; x++)
391			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
392			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
393	root	1.4	}
394	root	1.8
395			#############################################################################
396
397			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
398
399			SV *
400			pb_to_hv84 (GdkPixbuf *pb)
401			CODE:
402			{
403			int w = gdk_pixbuf_get_width (pb);
404			int h = gdk_pixbuf_get_height (pb);
405			int x, y;
406			guchar *dst;
407			int bpp = gdk_pixbuf_get_n_channels (pb);
408			guchar *src = gdk_pixbuf_get_pixels (pb);
409			int sstr = gdk_pixbuf_get_rowstride (pb);
410
411			RETVAL = newSV (6 * 8 * 12 / 8);
412			SvPOK_only (RETVAL);
413			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
414
415	root	1.25	dst = (guchar *)SvPVX (RETVAL);
416	root	1.8
417			/* some primitive error distribution + random dithering */
418
419			for (y = 0; y < h; y++)
420			{
421			guchar p = src + y sstr;
422
423			for (x = 0; x < w; x += 2)
424			{
425			unsigned int r, g, b, h, s, v, H, V1, V2;
426
427			if (bpp == 3)
428			r = p++, g = p++, b = *p++;
429			else if (bpp == 1)
430			r = g = b = *p++;
431			else
432			abort ();
433
434			rgb_to_hsv (r, g, b, &h, &s, &v);
435
436			H = (h * 15 / 255) << 4;
437			V1 = v;
438
439			if (bpp == 3)
440			r = p++, g = p++, b = *p++;
441			else if (bpp == 1)
442			r = g = b = *p++;
443			else
444			abort ();
445
446			rgb_to_hsv (r, g, b, &h, &s, &v);
447
448			H \|= h * 15 / 255;
449			V2 = v;
450
451			*dst++ = H;
452			*dst++ = V1;
453			*dst++ = V2;
454			}
455			}
456			}
457			OUTPUT:
458			RETVAL
459	root	1.4
460	root	1.9	SV *
461			hv84_to_av (unsigned char *hv84)
462			CODE:
463			{
464			int i = 72 / 3;
465			AV *av = newAV ();
466
467			RETVAL = (SV )newRV_noinc ((SV )av);
468			while (i--)
469			{
470			int h = *hv84++;
471			int v1 = *hv84++;
472			int v2 = *hv84++;
473
474			av_push (av, newSViv (v1));
475			av_push (av, newSViv ((h >> 4) * 255 / 15));
476			av_push (av, newSViv (v2));
477			av_push (av, newSViv ((h & 15) * 255 / 15));
478			}
479			}
480			OUTPUT:
481			RETVAL
482	root	1.2
483	root	1.20	#############################################################################
484
485			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
486
487			SV *
488			make_histograms (SV *ar)
489			CODE:
490			{
491			int i;
492			AV av, result;
493
494			if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
495			croak ("Not an array ref as first argument to make_histogram");
496
497			av = (AV *) SvRV (ar);
498			result = newAV ();
499
500			for (i = 0; i <= av_len (av); ++i)
501			{
502			const int HISTSIZE = 64;
503
504			int j;
505			SV sv = av_fetch (av, i, 1);
506			STRLEN len;
507			char *buf = SvPVbyte (sv, len);
508
509			int tmphist[HISTSIZE];
510			float *hist;
511
512			SV histsv = newSV (HISTSIZE sizeof (float) + 1);
513			SvPOK_on (histsv);
514			SvCUR_set (histsv, HISTSIZE * sizeof (float));
515			hist = (float *)SvPVX (histsv);
516
517			Zero (tmphist, sizeof (tmphist), char);
518
519			for (j = len; j--; )
520			{
521			unsigned int idx
522			= ((*buf & 0xc0) >> 2)
523			\| ((*buf & 0x18) >> 1)
524			\| (*buf & 0x03);
525
526			++tmphist[idx];
527			++buf;
528			}
529
530			for (j = 0; j < HISTSIZE; ++j)
531			hist[j] = (float)tmphist[j] / (len + 1e-30);
532
533			av_push (result, histsv);
534			}
535
536			RETVAL = newRV_noinc ((SV *)result);
537			}
538			OUTPUT:
539			RETVAL
540	root	1.1
541