--- CV/CV.xs 2003/11/02 12:55:41 1.1 +++ CV/CV.xs 2003/11/12 00:59:01 1.6 @@ -2,8 +2,238 @@ #include "perl.h" #include "XSUB.h" +#include + +#include +#include + +#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); +} + + +