CV/CV.xs

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

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

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

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);

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

        dst = SvPVX (RETVAL);

        for (y = 0; y < h; y++)
          {
            /* use a very primitive form of error distribution. */
            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) * 7 + 128) / 255;
                g = ((p[1] + eg) * 7 + 128) / 255;
                b = ((p[2] + eb) * 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;

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