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Comparing CV/CV.xs (file contents):
Revision 1.4 by root, Sat Nov 8 18:22:21 2003 UTC vs.
Revision 1.6 by root, Wed Nov 12 00:59:01 2003 UTC

… …
4 4
5#include <gdk-pixbuf/gdk-pixbuf.h> 5#include <gdk-pixbuf/gdk-pixbuf.h>
6 6
7#include <gperl.h> 7#include <gperl.h>
8#include <gtk2perl.h> 8#include <gtk2perl.h>
9
10#define IW 80
11
12#define RAND (seed = (seed + 7141) * 54773 % 134456)
13
14#define ELLIPSIS "\xe2\x80\xa6"
9 15
10static guint32 a85_val; 16static guint32 a85_val;
11static guint a85_cnt; 17static guint a85_cnt;
12static guchar a85_buf[80], *a85_ptr; 18static guchar a85_buf[80], *a85_ptr;
13 19
… …
59 *a85_ptr++ = '\n'; 65 *a85_ptr++ = '\n';
60 66
61 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 67 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
62} 68}
63 69
70/////////////////////////////////////////////////////////////////////////////
71
64MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow 72MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow
65 73
66PROTOTYPES: ENABLE 74PROTOTYPES: ENABLE
67 75
68GdkPixbuf_noinc * 76GdkPixbuf_noinc *
… …
110 for (i = 0; i < bpp; i++) 118 for (i = 0; i < bpp; i++)
111 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; 119 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
112} 120}
113 OUTPUT: 121 OUTPUT:
114 RETVAL 122 RETVAL
123
124#############################################################################
115 125
116MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 126MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
117 127
118GdkPixbuf_noinc * 128GdkPixbuf_noinc *
119p7_to_pb (int w, int h, guchar *src) 129p7_to_pb (int w, int h, guchar *src)
… …
149 int x, y; 159 int x, y;
150 guchar *dst; 160 guchar *dst;
151 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 161 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
152 guchar *src = gdk_pixbuf_get_pixels (pb); 162 guchar *src = gdk_pixbuf_get_pixels (pb);
153 int sstr = gdk_pixbuf_get_rowstride (pb); 163 int sstr = gdk_pixbuf_get_rowstride (pb);
164 int Er[IW], Eg[IW], Eb[IW];
165 int seed = 77;
154 166
155 RETVAL = newSV (w * h); 167 RETVAL = newSV (w * h);
156 SvPOK_only (RETVAL); 168 SvPOK_only (RETVAL);
157 SvCUR_set (RETVAL, w * h); 169 SvCUR_set (RETVAL, w * h);
158 170
159 dst = SvPVX (RETVAL); 171 dst = SvPVX (RETVAL);
160 172
173 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
161 for (y = 0; y < h; y++) 179 for (y = 0; y < h; y++)
162 { 180 {
163 /* use a very primitive form of error distribution. */
164 int er = 0, eg = 0, eb = 0; 181 int er = 0, eg = 0, eb = 0;
165 182
166 for (x = 0; x < w; x++) 183 for (x = 0; x < w; x++)
167 { 184 {
168 int r, g, b; 185 int r, g, b;
169 guchar *p = src + x * bpp + y * sstr; 186 guchar *p = src + x * bpp + y * sstr;
170 187
171 r = ((p[0] + er) * 7 + 128) / 255; 188 r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
172 g = ((p[1] + eg) * 7 + 128) / 255; 189 g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
173 b = ((p[2] + eb) * 3 + 128) / 255; 190 b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
174 191
175 r = r > 7 ? 7 : r < 0 ? 0 : r; 192 r = r > 7 ? 7 : r < 0 ? 0 : r;
176 g = g > 7 ? 7 : g < 0 ? 0 : g; 193 g = g > 7 ? 7 : g < 0 ? 0 : g;
177 b = b > 3 ? 3 : b < 0 ? 0 : b; 194 b = b > 3 ? 3 : b < 0 ? 0 : b;
178 195
179 er += p[0] - (r * 255 + 4) / 7; 196 er += p[0] - (r * 255 + 4) / 7;
180 eg += p[1] - (g * 255 + 4) / 7; 197 eg += p[1] - (g * 255 + 4) / 7;
181 eb += p[2] - (b * 255 + 2) / 3; 198 eb += p[2] - (b * 255 + 2) / 3;
182 199
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
183 *dst++ = r << 5 | g << 2 | b; 204 *dst++ = r << 5 | g << 2 | b;
184 } 205 }
185 } 206 }
186} 207}
187 OUTPUT: 208 OUTPUT:
188 RETVAL 209 RETVAL
210
211#############################################################################
189 212
190MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript 213MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
191 214
192void 215void
193dump_pb (PerlIO *fp, GdkPixbuf *pb) 216dump_pb (PerlIO *fp, GdkPixbuf *pb)

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