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 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

# missing in Gtk2 perl module

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

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

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

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

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

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

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

        RETVAL = 0;

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

        if (!fp)
          XSRETURN_UNDEF;

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

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

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

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

            XSRETURN_UNDEF;
          }

        jpeg_create_decompress (&cinfo);

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

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

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

        jpeg_calc_output_dimensions (&cinfo);

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

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

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

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

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

        jpeg_start_decompress (&cinfo);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

              src++;
            }
}
        OUTPUT:
        RETVAL

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

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

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

        a85_init ();

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

        a85_finish (fp);
}

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

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

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

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

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

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

        dst = (guchar *)SvPVX (RETVAL);

        /* some primitive error distribution + random dithering */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

            int tmphist[HISTSIZE];
            float *hist;

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

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

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

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

            av_push (result, histsv);
          }

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


Revision:	1.30
Committed:	Wed Dec 28 20:56:20 2005 UTC (18 years, 4 months ago) by root
Branch:	MAIN
Changes since 1.29:	+1 -4 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	1.29	# missing function in perl. really :)
132			int
133			common_prefix_length (a, b)
134			unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
135			unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
136			CODE:
137			RETVAL = 0;
138
139			while (a == b && *a)
140			{
141			RETVAL += (*a & 0xc0) != 0x80;
142			a++, b++;
143			}
144
145			OUTPUT:
146			RETVAL
147
148	root	1.22	# missing in Gtk2 perl module
149
150			gboolean
151			gdk_net_wm_supports (GdkAtom property)
152			CODE:
153			#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
154			RETVAL = gdk_net_wm_supports (property);
155			#else
156			RETVAL = 0;
157			#endif
158			OUTPUT:
159			RETVAL
160
161	root	1.3	GdkPixbuf_noinc *
162	root	1.26	dealpha_expose (GdkPixbuf *pb)
163			CODE:
164			{
165			int w = gdk_pixbuf_get_width (pb);
166			int h = gdk_pixbuf_get_height (pb);
167			int bpp = gdk_pixbuf_get_n_channels (pb);
168			int x, y, i;
169			guchar src = gdk_pixbuf_get_pixels (pb), dst;
170			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
171
172			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
173
174			dst = gdk_pixbuf_get_pixels (RETVAL);
175			dstr = gdk_pixbuf_get_rowstride (RETVAL);
176
177			for (x = 0; x < w; x++)
178			for (y = 0; y < h; y++)
179			for (i = 0; i < 3; i++)
180			dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
181			}
182			OUTPUT:
183			RETVAL
184
185			GdkPixbuf_noinc *
186	root	1.28	rotate (GdkPixbuf *pb, int angle)
187	root	1.2	CODE:
188	root	1.28	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
189			: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
190			: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
191			: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
192			: angle);
193	root	1.2	OUTPUT:
194			RETVAL
195
196	root	1.17	GdkPixbuf_noinc *
197	root	1.23	load_jpeg (SV *path, int thumbnail=0)
198	root	1.17	CODE:
199			{
200			struct jpeg_decompress_struct cinfo;
201			struct jpg_err_mgr jerr;
202			guchar *data;
203			int rs;
204			FILE *fp;
205			volatile GdkPixbuf *pb = 0;
206	root	1.23
207	root	1.17	RETVAL = 0;
208
209	root	1.30	fp = fopen (SvPVbyte_nolen (path), "rb");
210	root	1.23
211			if (!fp)
212	root	1.17	XSRETURN_UNDEF;
213
214			cinfo.err = jpeg_std_error (&jerr.err);
215
216			jerr.err.error_exit = cv_error_exit;
217			jerr.err.output_message = cv_error_output;
218
219			if ((rs = setjmp (jerr.setjmp_buffer)))
220			{
221			fclose (fp);
222			jpeg_destroy_decompress (&cinfo);
223
224			if (pb)
225			g_object_unref ((gpointer)pb);
226
227			XSRETURN_UNDEF;
228			}
229
230			jpeg_create_decompress (&cinfo);
231
232			jpeg_stdio_src (&cinfo, fp);
233			jpeg_read_header (&cinfo, TRUE);
234
235			cinfo.dct_method = JDCT_DEFAULT;
236			cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
237			cinfo.do_block_smoothing = FALSE;
238			cinfo.out_color_space = JCS_RGB;
239			cinfo.quantize_colors = FALSE;
240
241			cinfo.scale_num = 1;
242			cinfo.scale_denom = 1;
243
244			jpeg_calc_output_dimensions (&cinfo);
245
246			if (thumbnail)
247			{
248			cinfo.dct_method = JDCT_FASTEST;
249			cinfo.do_fancy_upsampling = FALSE;
250
251			while (cinfo.scale_denom < 8
252	root	1.21	&& cinfo.output_width >= IW*4
253			&& cinfo.output_height >= IH*4)
254	root	1.17	{
255			cinfo.scale_denom <<= 1;
256			jpeg_calc_output_dimensions (&cinfo);
257			}
258			}
259
260			pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
261			if (!RETVAL)
262			longjmp (jerr.setjmp_buffer, 2);
263
264			data = gdk_pixbuf_get_pixels (RETVAL);
265			rs = gdk_pixbuf_get_rowstride (RETVAL);
266
267			if (cinfo.output_components != 3)
268			longjmp (jerr.setjmp_buffer, 3);
269
270			jpeg_start_decompress (&cinfo);
271
272			while (cinfo.output_scanline < cinfo.output_height)
273			{
274			int remaining = cinfo.output_height - cinfo.output_scanline;
275			JSAMPROW rp[4];
276
277			rp [0] = data + cinfo.output_scanline * rs;
278			rp [1] = (guchar *)rp [0] + rs;
279			rp [2] = (guchar *)rp [1] + rs;
280			rp [3] = (guchar *)rp [2] + rs;
281
282			jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
283			}
284
285			jpeg_finish_decompress (&cinfo);
286			fclose (fp);
287			jpeg_destroy_decompress (&cinfo);
288			}
289			OUTPUT:
290			RETVAL
291
292	root	1.6	#############################################################################
293
294	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
295
296	root	1.18	SV *
297			foldcase (SV *pathsv)
298			PROTOTYPE: $
299			CODE:
300			{
301			STRLEN plen;
302	root	1.25	U8 path = (U8 )SvPVutf8 (pathsv, plen);
303	root	1.18	U8 *pend = path + plen;
304			U8 dst [plen * 6 * 3], *dstp = dst;
305
306			while (path < pend)
307			{
308	root	1.19	U8 ch = *path;
309
310			if (ch >= 'a' && ch <= 'z')
311			dstp++ = path++;
312			else if (ch >= '0' && ch <= '9')
313	root	1.18	{
314			STRLEN el, nl = 0;
315	root	1.19	while (path >= '0' && path <= '9' && path < pend)
316	root	1.18	path++, nl++;
317
318			for (el = nl; el < 6; el++)
319			*dstp++ = '0';
320
321			memcpy (dstp, path - nl, nl);
322			dstp += nl;
323			}
324			else
325			{
326			STRLEN cl;
327			to_utf8_fold (path, dstp, &cl);
328			dstp += cl;
329			path += is_utf8_char (path);
330			}
331			}
332
333	root	1.25	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
334	root	1.18	}
335			OUTPUT:
336			RETVAL
337
338	root	1.3	GdkPixbuf_noinc *
339	root	1.24	p7_to_pb (int w, int h, SV *src_sv)
340	root	1.21	PROTOTYPE: @
341	root	1.2	CODE:
342			{
343			int x, y;
344			guchar dst, d;
345			int dstr;
346	root	1.25	guchar src = (guchar )SvPVbyte_nolen (src_sv);
347	root	1.2
348			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
349			dst = gdk_pixbuf_get_pixels (RETVAL);
350			dstr = gdk_pixbuf_get_rowstride (RETVAL);
351
352			for (y = 0; y < h; y++)
353			for (d = dst + y * dstr, x = 0; x < w; x++)
354			{
355	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
356			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
357			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
358	root	1.2
359			src++;
360			}
361	root	1.3	}
362			OUTPUT:
363			RETVAL
364
365	root	1.6	#############################################################################
366	root	1.4
367			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
368
369			void
370	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
371	root	1.4	CODE:
372			{
373			int w = gdk_pixbuf_get_width (pb);
374			int h = gdk_pixbuf_get_height (pb);
375			int x, y, i;
376			guchar *dst;
377	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
378	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
379			int sstr = gdk_pixbuf_get_rowstride (pb);
380
381			a85_init ();
382
383			for (y = 0; y < h; y++)
384			for (x = 0; x < w; x++)
385	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
386	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
387
388			a85_finish (fp);
389	root	1.7	}
390
391			void
392			dump_binary (PerlIO fp, GdkPixbuf pb)
393			CODE:
394			{
395			int w = gdk_pixbuf_get_width (pb);
396			int h = gdk_pixbuf_get_height (pb);
397			int x, y, i;
398			guchar *dst;
399			int bpp = gdk_pixbuf_get_n_channels (pb);
400			guchar *src = gdk_pixbuf_get_pixels (pb);
401			int sstr = gdk_pixbuf_get_rowstride (pb);
402
403			for (y = 0; y < h; y++)
404			for (x = 0; x < w; x++)
405			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
406			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
407	root	1.4	}
408	root	1.8
409			#############################################################################
410
411			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
412
413			SV *
414			pb_to_hv84 (GdkPixbuf *pb)
415			CODE:
416			{
417			int w = gdk_pixbuf_get_width (pb);
418			int h = gdk_pixbuf_get_height (pb);
419			int x, y;
420			guchar *dst;
421			int bpp = gdk_pixbuf_get_n_channels (pb);
422			guchar *src = gdk_pixbuf_get_pixels (pb);
423			int sstr = gdk_pixbuf_get_rowstride (pb);
424
425			RETVAL = newSV (6 * 8 * 12 / 8);
426			SvPOK_only (RETVAL);
427			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
428
429	root	1.25	dst = (guchar *)SvPVX (RETVAL);
430	root	1.8
431			/* some primitive error distribution + random dithering */
432
433			for (y = 0; y < h; y++)
434			{
435			guchar p = src + y sstr;
436
437			for (x = 0; x < w; x += 2)
438			{
439			unsigned int r, g, b, h, s, v, H, V1, V2;
440
441			if (bpp == 3)
442			r = p++, g = p++, b = *p++;
443			else if (bpp == 1)
444			r = g = b = *p++;
445			else
446			abort ();
447
448			rgb_to_hsv (r, g, b, &h, &s, &v);
449
450			H = (h * 15 / 255) << 4;
451			V1 = v;
452
453			if (bpp == 3)
454			r = p++, g = p++, b = *p++;
455			else if (bpp == 1)
456			r = g = b = *p++;
457			else
458			abort ();
459
460			rgb_to_hsv (r, g, b, &h, &s, &v);
461
462			H \|= h * 15 / 255;
463			V2 = v;
464
465			*dst++ = H;
466			*dst++ = V1;
467			*dst++ = V2;
468			}
469			}
470			}
471			OUTPUT:
472			RETVAL
473	root	1.4
474	root	1.9	SV *
475			hv84_to_av (unsigned char *hv84)
476			CODE:
477			{
478			int i = 72 / 3;
479			AV *av = newAV ();
480
481			RETVAL = (SV )newRV_noinc ((SV )av);
482			while (i--)
483			{
484			int h = *hv84++;
485			int v1 = *hv84++;
486			int v2 = *hv84++;
487
488			av_push (av, newSViv (v1));
489			av_push (av, newSViv ((h >> 4) * 255 / 15));
490			av_push (av, newSViv (v2));
491			av_push (av, newSViv ((h & 15) * 255 / 15));
492			}
493			}
494			OUTPUT:
495			RETVAL
496	root	1.2
497	root	1.20	#############################################################################
498
499			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
500
501			SV *
502			make_histograms (SV *ar)
503			CODE:
504			{
505			int i;
506			AV av, result;
507
508			if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
509			croak ("Not an array ref as first argument to make_histogram");
510
511			av = (AV *) SvRV (ar);
512			result = newAV ();
513
514			for (i = 0; i <= av_len (av); ++i)
515			{
516			const int HISTSIZE = 64;
517
518			int j;
519			SV sv = av_fetch (av, i, 1);
520			STRLEN len;
521			char *buf = SvPVbyte (sv, len);
522
523			int tmphist[HISTSIZE];
524			float *hist;
525
526			SV histsv = newSV (HISTSIZE sizeof (float) + 1);
527			SvPOK_on (histsv);
528			SvCUR_set (histsv, HISTSIZE * sizeof (float));
529			hist = (float *)SvPVX (histsv);
530
531			Zero (tmphist, sizeof (tmphist), char);
532
533			for (j = len; j--; )
534			{
535			unsigned int idx
536			= ((*buf & 0xc0) >> 2)
537			\| ((*buf & 0x18) >> 1)
538			\| (*buf & 0x03);
539
540			++tmphist[idx];
541			++buf;
542			}
543
544			for (j = 0; j < HISTSIZE; ++j)
545			hist[j] = (float)tmphist[j] / (len + 1e-30);
546
547			av_push (result, histsv);
548			}
549
550			RETVAL = newRV_noinc ((SV *)result);
551			}
552			OUTPUT:
553			RETVAL
554	root	1.1
555