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 LINELENGTH 240

#define ELLIPSIS "\xe2\x80\xa6"

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);
}

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;
    }
}

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

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_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, 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_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, 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_n_channels (pb);
        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_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 = 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


Revision:	1.8
Committed:	Mon Apr 5 20:55:10 2004 UTC (20 years, 1 month ago) by root
Branch:	MAIN
Changes since 1.7:	+93 -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	1.7	#define LINELENGTH 240
15
16	root	1.6	#define ELLIPSIS "\xe2\x80\xa6"
17
18	root	1.4	static guint32 a85_val;
19			static guint a85_cnt;
20	root	1.7	static guchar a85_buf[LINELENGTH], *a85_ptr;
21	root	1.4
22			static void
23			a85_init (void)
24			{
25			a85_cnt = 4;
26			a85_ptr = a85_buf;
27			}
28
29			static void
30			a85_push (PerlIO *fp, guchar c)
31			{
32			a85_val = a85_val << 8 \| c;
33
34			if (!--a85_cnt)
35			{
36			a85_cnt = 4;
37			if (a85_val)
38			{
39			a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
40			a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
41			a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
42			a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
43			a85_ptr[0] = (a85_val ) + 33;
44
45			a85_ptr += 5;
46			}
47			else
48			*a85_ptr++ = 'z';
49
50			if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
51			{
52			*a85_ptr++ = '\n';
53			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
54			a85_ptr = a85_buf;
55			}
56			}
57
58			}
59
60	root	1.8	static void
61	root	1.4	a85_finish (PerlIO *fp)
62			{
63			while (a85_cnt != 4)
64			a85_push (fp, 0);
65
66			*a85_ptr++ = '~'; // probably buggy end-marker
67			*a85_ptr++ = '>'; // probably buggy end-marker
68			*a85_ptr++ = '\n';
69
70			PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
71			}
72
73	root	1.8	static void
74			rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
75			unsigned int h, unsigned int s, unsigned int *v)
76			{
77			unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
78			unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
79			unsigned int delta = mx - mn;
80
81			*v = mx;
82
83			s = mx ? delta 255 / mx : 0;
84
85			if (delta == 0)
86			*h = 0;
87			else
88			{
89			if (r == mx)
90			h = ((int)g - (int)b) 255 / (int)(delta * 3);
91			else if (g == mx)
92			h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
93			else if (b == mx)
94			h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
95
96			*h &= 255;
97			}
98			}
99
100	root	1.6	/////////////////////////////////////////////////////////////////////////////
101
102	root	1.1	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow
103
104			PROTOTYPES: ENABLE
105	root	1.2
106	root	1.3	GdkPixbuf_noinc *
107	root	1.2	transpose (GdkPixbuf *pb)
108			CODE:
109			{
110			int w = gdk_pixbuf_get_width (pb);
111			int h = gdk_pixbuf_get_height (pb);
112	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
113	root	1.2	int x, y, i;
114			guchar src = gdk_pixbuf_get_pixels (pb), dst;
115			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
116
117			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);
118
119			dst = gdk_pixbuf_get_pixels (RETVAL);
120			dstr = gdk_pixbuf_get_rowstride (RETVAL);
121
122	root	1.3	for (y = 0; y < h; y++)
123			for (x = 0; x < w; x++)
124	root	1.2	for (i = 0; i < bpp; i++)
125			dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];
126			}
127			OUTPUT:
128			RETVAL
129
130	root	1.3	GdkPixbuf_noinc *
131	root	1.2	flop (GdkPixbuf *pb)
132			CODE:
133			{
134			int w = gdk_pixbuf_get_width (pb);
135			int h = gdk_pixbuf_get_height (pb);
136	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
137	root	1.2	int x, y, i;
138			guchar src = gdk_pixbuf_get_pixels (pb), dst;
139			int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
140
141			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
142
143			dst = gdk_pixbuf_get_pixels (RETVAL);
144			dstr = gdk_pixbuf_get_rowstride (RETVAL);
145
146	root	1.3	for (y = 0; y < h; y++)
147			for (x = 0; x < w; x++)
148	root	1.2	for (i = 0; i < bpp; i++)
149	root	1.4	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
150	root	1.2	}
151			OUTPUT:
152			RETVAL
153
154	root	1.6	#############################################################################
155
156	root	1.2	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
157
158	root	1.3	GdkPixbuf_noinc *
159	root	1.2	p7_to_pb (int w, int h, guchar *src)
160			CODE:
161			{
162			int x, y;
163			guchar dst, d;
164			int dstr;
165
166			RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
167			dst = gdk_pixbuf_get_pixels (RETVAL);
168			dstr = gdk_pixbuf_get_rowstride (RETVAL);
169
170			for (y = 0; y < h; y++)
171			for (d = dst + y * dstr, x = 0; x < w; x++)
172			{
173	root	1.3	d++ = (((src >> 5) & 7) * 255 + 4) / 7;
174			d++ = (((src >> 2) & 7) * 255 + 4) / 7;
175			d++ = (((src >> 0) & 3) * 255 + 2) / 3;
176	root	1.2
177			src++;
178			}
179	root	1.3	}
180			OUTPUT:
181			RETVAL
182
183			SV *
184			pb_to_p7 (GdkPixbuf *pb)
185			CODE:
186			{
187			int w = gdk_pixbuf_get_width (pb);
188			int h = gdk_pixbuf_get_height (pb);
189			int x, y;
190			guchar *dst;
191	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
192	root	1.3	guchar *src = gdk_pixbuf_get_pixels (pb);
193			int sstr = gdk_pixbuf_get_rowstride (pb);
194	root	1.5	int Er[IW], Eg[IW], Eb[IW];
195			int seed = 77;
196	root	1.3
197			RETVAL = newSV (w * h);
198			SvPOK_only (RETVAL);
199			SvCUR_set (RETVAL, w * h);
200
201			dst = SvPVX (RETVAL);
202
203	root	1.5	memset (Er, 0, sizeof (int) * IW);
204			memset (Eg, 0, sizeof (int) * IW);
205			memset (Eb, 0, sizeof (int) * IW);
206
207			/* some primitive error distribution + random dithering */
208
209	root	1.3	for (y = 0; y < h; y++)
210			{
211			int er = 0, eg = 0, eb = 0;
212
213			for (x = 0; x < w; x++)
214			{
215			int r, g, b;
216			guchar p = src + x bpp + y * sstr;
217
218	root	1.5	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
219			g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
220			b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
221	root	1.3
222			r = r > 7 ? 7 : r < 0 ? 0 : r;
223			g = g > 7 ? 7 : g < 0 ? 0 : g;
224			b = b > 3 ? 3 : b < 0 ? 0 : b;
225
226			er += p[0] - (r * 255 + 4) / 7;
227			eg += p[1] - (g * 255 + 4) / 7;
228			eb += p[2] - (b * 255 + 2) / 3;
229	root	1.5
230			Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
231			Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
232			Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;
233	root	1.3
234			*dst++ = r << 5 \| g << 2 \| b;
235			}
236			}
237	root	1.2	}
238			OUTPUT:
239			RETVAL
240	root	1.6
241			#############################################################################
242	root	1.4
243			MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
244
245			void
246	root	1.7	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
247	root	1.4	CODE:
248			{
249			int w = gdk_pixbuf_get_width (pb);
250			int h = gdk_pixbuf_get_height (pb);
251			int x, y, i;
252			guchar *dst;
253	root	1.7	int bpp = gdk_pixbuf_get_n_channels (pb);
254	root	1.4	guchar *src = gdk_pixbuf_get_pixels (pb);
255			int sstr = gdk_pixbuf_get_rowstride (pb);
256
257			a85_init ();
258
259			for (y = 0; y < h; y++)
260			for (x = 0; x < w; x++)
261	root	1.7	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
262	root	1.4	a85_push (fp, src [x * bpp + y * sstr + i]);
263
264			a85_finish (fp);
265	root	1.7	}
266
267			void
268			dump_binary (PerlIO fp, GdkPixbuf pb)
269			CODE:
270			{
271			int w = gdk_pixbuf_get_width (pb);
272			int h = gdk_pixbuf_get_height (pb);
273			int x, y, i;
274			guchar *dst;
275			int bpp = gdk_pixbuf_get_n_channels (pb);
276			guchar *src = gdk_pixbuf_get_pixels (pb);
277			int sstr = gdk_pixbuf_get_rowstride (pb);
278
279			for (y = 0; y < h; y++)
280			for (x = 0; x < w; x++)
281			for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
282			PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
283	root	1.4	}
284	root	1.8
285			#############################################################################
286
287			MODULE = Gtk2::CV PACKAGE = Gtk2::CV
288
289			SV *
290			pb_to_hv84 (GdkPixbuf *pb)
291			CODE:
292			{
293			int w = gdk_pixbuf_get_width (pb);
294			int h = gdk_pixbuf_get_height (pb);
295			int x, y;
296			guchar *dst;
297			int bpp = gdk_pixbuf_get_n_channels (pb);
298			guchar *src = gdk_pixbuf_get_pixels (pb);
299			int sstr = gdk_pixbuf_get_rowstride (pb);
300
301			RETVAL = newSV (6 * 8 * 12 / 8);
302			SvPOK_only (RETVAL);
303			SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
304
305			dst = SvPVX (RETVAL);
306
307			/* some primitive error distribution + random dithering */
308
309			for (y = 0; y < h; y++)
310			{
311			guchar p = src + y sstr;
312
313			for (x = 0; x < w; x += 2)
314			{
315			unsigned int r, g, b, h, s, v, H, V1, V2;
316
317			if (bpp == 3)
318			r = p++, g = p++, b = *p++;
319			else if (bpp == 1)
320			r = g = b = *p++;
321			else
322			abort ();
323
324			rgb_to_hsv (r, g, b, &h, &s, &v);
325
326			H = (h * 15 / 255) << 4;
327			V1 = v;
328
329			if (bpp == 3)
330			r = p++, g = p++, b = *p++;
331			else if (bpp == 1)
332			r = g = b = *p++;
333			else
334			abort ();
335
336			rgb_to_hsv (r, g, b, &h, &s, &v);
337
338			H \|= h * 15 / 255;
339			V2 = v;
340
341			*dst++ = H;
342			*dst++ = V1;
343			*dst++ = V2;
344			}
345			}
346			}
347			OUTPUT:
348			RETVAL
349	root	1.4
350	root	1.2
351	root	1.1
352