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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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#include <gdk-pixbuf/gdk-pixbuf.h> |
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|
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#include <gperl.h> |
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#include <gtk2perl.h> |
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|
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#define IW 80 |
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|
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#define RAND (seed = (seed + 7141) * 54773 % 134456) |
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|
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static guint32 a85_val; |
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static guint a85_cnt; |
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static guchar a85_buf[80], *a85_ptr; |
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|
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static void |
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a85_init (void) |
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{ |
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a85_cnt = 4; |
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a85_ptr = a85_buf; |
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} |
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|
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static void |
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a85_push (PerlIO *fp, guchar c) |
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{ |
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a85_val = a85_val << 8 | c; |
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|
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if (!--a85_cnt) |
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{ |
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a85_cnt = 4; |
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if (a85_val) |
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{ |
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a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
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a85_ptr[0] = (a85_val ) + 33; |
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|
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a85_ptr += 5; |
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} |
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else |
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*a85_ptr++ = 'z'; |
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|
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if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
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{ |
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*a85_ptr++ = '\n'; |
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PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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a85_ptr = a85_buf; |
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} |
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} |
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|
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} |
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|
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a85_finish (PerlIO *fp) |
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{ |
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while (a85_cnt != 4) |
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a85_push (fp, 0); |
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|
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*a85_ptr++ = '~'; // probably buggy end-marker |
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*a85_ptr++ = '>'; // probably buggy end-marker |
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*a85_ptr++ = '\n'; |
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|
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PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
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} |
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|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow |
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|
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PROTOTYPES: ENABLE |
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|
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GdkPixbuf_noinc * |
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transpose (GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
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int x, y, i; |
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guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
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int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
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|
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); |
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|
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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|
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for (y = 0; y < h; y++) |
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for (x = 0; x < w; x++) |
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for (i = 0; i < bpp; i++) |
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dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; |
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} |
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OUTPUT: |
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RETVAL |
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|
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GdkPixbuf_noinc * |
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flop (GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
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int x, y, i; |
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guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
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int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
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|
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); |
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|
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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|
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for (y = 0; y < h; y++) |
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for (x = 0; x < w; x++) |
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for (i = 0; i < bpp; i++) |
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dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; |
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} |
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OUTPUT: |
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RETVAL |
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|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
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|
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GdkPixbuf_noinc * |
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p7_to_pb (int w, int h, guchar *src) |
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CODE: |
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{ |
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int x, y; |
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guchar *dst, *d; |
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int dstr; |
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|
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RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
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dst = gdk_pixbuf_get_pixels (RETVAL); |
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dstr = gdk_pixbuf_get_rowstride (RETVAL); |
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|
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for (y = 0; y < h; y++) |
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for (d = dst + y * dstr, x = 0; x < w; x++) |
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{ |
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*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
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*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
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*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
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|
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src++; |
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} |
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} |
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OUTPUT: |
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RETVAL |
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|
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SV * |
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pb_to_p7 (GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int x, y; |
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guchar *dst; |
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int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
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guchar *src = gdk_pixbuf_get_pixels (pb); |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
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int Er[IW], Eg[IW], Eb[IW]; |
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int seed = 77; |
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|
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RETVAL = newSV (w * h); |
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SvPOK_only (RETVAL); |
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SvCUR_set (RETVAL, w * h); |
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|
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dst = SvPVX (RETVAL); |
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|
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memset (Er, 0, sizeof (int) * IW); |
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memset (Eg, 0, sizeof (int) * IW); |
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memset (Eb, 0, sizeof (int) * IW); |
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|
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/* some primitive error distribution + random dithering */ |
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|
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for (y = 0; y < h; y++) |
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{ |
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int er = 0, eg = 0, eb = 0; |
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|
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for (x = 0; x < w; x++) |
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{ |
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int r, g, b; |
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guchar *p = src + x * bpp + y * sstr; |
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|
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r = ((p[0] + er + Er[x]) * 7 + 128) / 255; |
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g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255; |
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b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255; |
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|
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r = r > 7 ? 7 : r < 0 ? 0 : r; |
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g = g > 7 ? 7 : g < 0 ? 0 : g; |
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b = b > 3 ? 3 : b < 0 ? 0 : b; |
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|
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er += p[0] - (r * 255 + 4) / 7; |
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eg += p[1] - (g * 255 + 4) / 7; |
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eb += p[2] - (b * 255 + 2) / 3; |
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|
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Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; |
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Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; |
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Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; |
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|
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*dst++ = r << 5 | g << 2 | b; |
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} |
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} |
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} |
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OUTPUT: |
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RETVAL |
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|
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MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
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|
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void |
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dump_pb (PerlIO *fp, GdkPixbuf *pb) |
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CODE: |
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{ |
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int w = gdk_pixbuf_get_width (pb); |
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int h = gdk_pixbuf_get_height (pb); |
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int x, y, i; |
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guchar *dst; |
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int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; |
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guchar *src = gdk_pixbuf_get_pixels (pb); |
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int sstr = gdk_pixbuf_get_rowstride (pb); |
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|
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a85_init (); |
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|
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for (y = 0; y < h; y++) |
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for (x = 0; x < w; x++) |
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for (i = 0; i < 3; i++) |
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a85_push (fp, src [x * bpp + y * sstr + i]); |
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|
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a85_finish (fp); |
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} |
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|
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|
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|
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