CV/CV.xs

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

#include <gdk-pixbuf/gdk-pixbuf.h>

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

#define IW 80

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

#define ELLIPSIS "\xe2\x80\xa6"

static guint32 a85_val;
static guint a85_cnt;
static guchar a85_buf[80], *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;
        }
    }
    
}

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::ImageWindow

PROTOTYPES: ENABLE

GdkPixbuf_noinc *
transpose (GdkPixbuf *pb)
        CODE:
{
        int w = gdk_pixbuf_get_width (pb);
        int h = gdk_pixbuf_get_height (pb);
        int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
        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, bpp == 4, 8, h, w);

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

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

GdkPixbuf_noinc *
flop (GdkPixbuf *pb)
        CODE:
{
        int w = gdk_pixbuf_get_width (pb);
        int h = gdk_pixbuf_get_height (pb);
        int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
        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, bpp == 4, 8, w, h);

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

        for (y = 0; y < h; y++)
          for (x = 0; x < w; x++)
            for (i = 0; i < bpp; i++)
              dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
}
        OUTPUT:
        RETVAL

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

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

GdkPixbuf_noinc *
p7_to_pb (int w, int h, guchar *src)
        CODE:
{
        int x, y;
        guchar *dst, *d;
        int 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 (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

SV *
pb_to_p7 (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_has_alpha (pb) ? 4 : 3;
        guchar *src = gdk_pixbuf_get_pixels (pb);
        int sstr = gdk_pixbuf_get_rowstride (pb);
        int Er[IW], Eg[IW], Eb[IW];
        int seed = 77;

        RETVAL = newSV (w * h);
        SvPOK_only (RETVAL);
        SvCUR_set (RETVAL, w * h);

        dst = SvPVX (RETVAL);

        memset (Er, 0, sizeof (int) * IW);
        memset (Eg, 0, sizeof (int) * IW);
        memset (Eb, 0, sizeof (int) * IW);

        /* some primitive error distribution + random dithering */

        for (y = 0; y < h; y++)
          {
            int er = 0, eg = 0, eb = 0;

            for (x = 0; x < w; x++)
              {
                int r, g, b;
                guchar *p = src + x * bpp + y * sstr;

                r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
                g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
                b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;

                r = r > 7 ? 7 : r < 0 ? 0 : r;
                g = g > 7 ? 7 : g < 0 ? 0 : g;
                b = b > 3 ? 3 : b < 0 ? 0 : b;

                er += p[0] - (r * 255 + 4) / 7;
                eg += p[1] - (g * 255 + 4) / 7;
                eb += p[2] - (b * 255 + 2) / 3;

                Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
                Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
                Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;

                *dst++ = r << 5 | g << 2 | b;
              }
          }
}
        OUTPUT:
        RETVAL

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

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

void
dump_pb (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_has_alpha (pb) ? 4 : 3;
        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 < 3; i++)
              a85_push (fp, src [x * bpp + y * sstr + i]);

        a85_finish (fp);
}


Revision:	1.6
Committed:	Wed Nov 12 00:59:01 2003 UTC (20 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.5:	+8 -0 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	1.2	#include <gdk-pixbuf/gdk-pixbuf.h>
6
7			#include <gperl.h>
8			#include <gtk2perl.h>
9
10	root	1.5	#define IW 80
11
12			#define RAND (seed = (seed + 7141) * 54773 % 134456)
13
14	root	1.6	#define ELLIPSIS "\xe2\x80\xa6"
15
16	root	1.4	static guint32 a85_val;
17			static guint a85_cnt;
18			static guchar a85_buf[80], *a85_ptr;
19
20			static void
21			a85_init (void)
22			{
23			a85_cnt = 4;
24			a85_ptr = a85_buf;
25			}
26
27			static void
28			a85_push (PerlIO *fp, guchar c)
29			{
30			a85_val = a85_val << 8 \| c;
31
32			if (!--a85_cnt)
33			{
34			a85_cnt = 4;
35			if (a85_val)
36			{
37			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
38			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
39			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
40			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
41			a85_ptr[0] = (a85_val ) + 33;
42
43			a85_ptr += 5;
44			}
45			else
46			*a85_ptr++ = 'z';
47
48			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
49			{
50			*a85_ptr++ = '\n';
51			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
52			a85_ptr = a85_buf;
53			}
54			}
55
56			}
57
58			a85_finish (PerlIO *fp)
59			{
60			while (a85_cnt != 4)
61			a85_push (fp, 0);
62
63			*a85_ptr++ = '~'; // probably buggy end-marker
64			*a85_ptr++ = '>'; // probably buggy end-marker
65			*a85_ptr++ = '\n';
66
67			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
68			}
69
70	root	1.6	/////////////////////////////////////////////////////////////////////////////
71
72	root	1.1	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow
73
74			PROTOTYPES: ENABLE
75	root	1.2
76	root	1.3	GdkPixbuf_noinc *
77	root	1.2	transpose (GdkPixbuf *pb)
78			CODE:
79			{
80			int w = gdk_pixbuf_get_width (pb);
81			int h = gdk_pixbuf_get_height (pb);
82			int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
83			int x, y, i;
84			guchar src = gdk_pixbuf_get_pixels (pb), dst;
85			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
86
87			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);
88
89			dst = gdk_pixbuf_get_pixels (RETVAL);
90			dstr = gdk_pixbuf_get_rowstride (RETVAL);
91
92	root	1.3	for (y = 0; y < h; y++)
93			for (x = 0; x < w; x++)
94	root	1.2	for (i = 0; i < bpp; i++)
95			dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];
96			}
97			OUTPUT:
98			RETVAL
99
100	root	1.3	GdkPixbuf_noinc *
101	root	1.2	flop (GdkPixbuf *pb)
102			CODE:
103			{
104			int w = gdk_pixbuf_get_width (pb);
105			int h = gdk_pixbuf_get_height (pb);
106			int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
107			int x, y, i;
108			guchar src = gdk_pixbuf_get_pixels (pb), dst;
109			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
110
111			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
112
113			dst = gdk_pixbuf_get_pixels (RETVAL);
114			dstr = gdk_pixbuf_get_rowstride (RETVAL);
115
116	root	1.3	for (y = 0; y < h; y++)
117			for (x = 0; x < w; x++)
118	root	1.2	for (i = 0; i < bpp; i++)
119	root	1.4	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
120	root	1.2	}
121			OUTPUT:
122			RETVAL
123
124	root	1.6	#############################################################################
125
126	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
127
128	root	1.3	GdkPixbuf_noinc *
129	root	1.2	p7_to_pb (int w, int h, guchar *src)
130			CODE:
131			{
132			int x, y;
133			guchar dst, d;
134			int dstr;
135
136			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
137			dst = gdk_pixbuf_get_pixels (RETVAL);
138			dstr = gdk_pixbuf_get_rowstride (RETVAL);
139
140			for (y = 0; y < h; y++)
141			for (d = dst + y * dstr, x = 0; x < w; x++)
142			{
143	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
144			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
145			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
146	root	1.2
147			src++;
148			}
149	root	1.3	}
150			OUTPUT:
151			RETVAL
152
153			SV *
154			pb_to_p7 (GdkPixbuf *pb)
155			CODE:
156			{
157			int w = gdk_pixbuf_get_width (pb);
158			int h = gdk_pixbuf_get_height (pb);
159			int x, y;
160			guchar *dst;
161			int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
162			guchar *src = gdk_pixbuf_get_pixels (pb);
163			int sstr = gdk_pixbuf_get_rowstride (pb);
164	root	1.5	int Er[IW], Eg[IW], Eb[IW];
165			int seed = 77;
166	root	1.3
167			RETVAL = newSV (w * h);
168			SvPOK_only (RETVAL);
169			SvCUR_set (RETVAL, w * h);
170
171			dst = SvPVX (RETVAL);
172
173	root	1.5	memset (Er, 0, sizeof (int) * IW);
174			memset (Eg, 0, sizeof (int) * IW);
175			memset (Eb, 0, sizeof (int) * IW);
176
177			/* some primitive error distribution + random dithering */
178
179	root	1.3	for (y = 0; y < h; y++)
180			{
181			int er = 0, eg = 0, eb = 0;
182
183			for (x = 0; x < w; x++)
184			{
185			int r, g, b;
186			guchar p = src + x bpp + y * sstr;
187
188	root	1.5	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
189			g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
190			b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
191	root	1.3
192			r = r > 7 ? 7 : r < 0 ? 0 : r;
193			g = g > 7 ? 7 : g < 0 ? 0 : g;
194			b = b > 3 ? 3 : b < 0 ? 0 : b;
195
196			er += p[0] - (r * 255 + 4) / 7;
197			eg += p[1] - (g * 255 + 4) / 7;
198			eb += p[2] - (b * 255 + 2) / 3;
199	root	1.5
200			Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
201			Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
202			Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;
203	root	1.3
204			*dst++ = r << 5 \| g << 2 \| b;
205			}
206			}
207	root	1.2	}
208			OUTPUT:
209			RETVAL
210	root	1.6
211			#############################################################################
212	root	1.4
213			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
214
215			void
216			dump_pb (PerlIO fp, GdkPixbuf pb)
217			CODE:
218			{
219			int w = gdk_pixbuf_get_width (pb);
220			int h = gdk_pixbuf_get_height (pb);
221			int x, y, i;
222			guchar *dst;
223			int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
224			guchar *src = gdk_pixbuf_get_pixels (pb);
225			int sstr = gdk_pixbuf_get_rowstride (pb);
226
227			a85_init ();
228
229			for (y = 0; y < h; y++)
230			for (x = 0; x < w; x++)
231			for (i = 0; i < 3; i++)
232			a85_push (fp, src [x * bpp + y * sstr + i]);
233
234			a85_finish (fp);
235			}
236
237	root	1.2
238	root	1.1
239