--- CV/CV.xs 2003/11/08 18:22:21 1.4 +++ CV/CV.xs 2005/07/20 02:26:46 1.16 @@ -7,9 +7,17 @@ #include #include +#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[80], *a85_ptr; +static guchar a85_buf[LINELENGTH], *a85_ptr; static void a85_init (void) @@ -49,6 +57,7 @@ } +static void a85_finish (PerlIO *fp) { while (a85_cnt != 4) @@ -61,7 +70,36 @@ PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); } -MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow +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 PROTOTYPES: ENABLE @@ -71,7 +109,7 @@ { 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 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; @@ -95,7 +133,7 @@ { 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 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; @@ -113,6 +151,8 @@ OUTPUT: RETVAL +############################################################################# + MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer GdkPixbuf_noinc * @@ -148,9 +188,11 @@ int h = gdk_pixbuf_get_height (pb); int x, y; guchar *dst; - int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; + 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); @@ -158,9 +200,14 @@ 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++) { - /* use a very primitive form of error distribution. */ int er = 0, eg = 0, eb = 0; for (x = 0; x < w; x++) @@ -168,9 +215,9 @@ 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 = ((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; @@ -180,6 +227,10 @@ eg += p[1] - (g * 255 + 4) / 7; eb += p[2] - (b * 255 + 2) / 3; + Er[x] = er / 2; er -= er / 2 + RAND % 5 - 2; + Eg[x] = eg / 2; eg -= eg / 2 + RAND % 5 - 2; + Eb[x] = eb / 2; eb -= eb / 2 + RAND % 5 - 2; + *dst++ = r << 5 | g << 2 | b; } } @@ -187,17 +238,75 @@ OUTPUT: RETVAL +SV * +make_histogram (SV *ar) + CODE: +{ + int i; + AV *av, *result; + + if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) + croak ("Not an array ref as first argument to make_histogram"); + + av = (AV *) SvRV (ar); + result = newAV (); + + for (i = 0; i <= av_len (av); ++i) + { + const int HISTSIZE = 64; + + int j; + SV *sv = *av_fetch (av, i, 1); + STRLEN len; + char *buf = SvPVbyte (sv, len); + + int tmphist[HISTSIZE]; + float *hist; + + SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); + SvPOK_on (histsv); + SvCUR_set (histsv, HISTSIZE * sizeof (float)); + hist = (float *)SvPVX (histsv); + + Zero (tmphist, sizeof (tmphist), char); + + for (j = len; j--; ) + { + unsigned int idx + = ((*buf & 0xc0) >> 2) + | ((*buf & 0x18) >> 1) + | (*buf & 0x03); + + ++tmphist[idx]; + ++buf; + } + + for (j = 0; j < HISTSIZE; ++j) + hist[j] = (float)tmphist[j] / (len + 1e-30); + + av_push (result, histsv); + } + + RETVAL = newRV_noinc ((SV *)result); +} + OUTPUT: + RETVAL + + + +############################################################################# + MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript void -dump_pb (PerlIO *fp, GdkPixbuf *pb) +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_has_alpha (pb) ? 4 : 3; + int bpp = gdk_pixbuf_get_n_channels (pb); guchar *src = gdk_pixbuf_get_pixels (pb); int sstr = gdk_pixbuf_get_rowstride (pb); @@ -205,12 +314,117 @@ for (y = 0; y < h; y++) for (x = 0; x < w; x++) - for (i = 0; i < 3; i++) + 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 + +SV * +hv84_to_av (unsigned char *hv84) + CODE: +{ + int i = 72 / 3; + AV *av = newAV (); + + RETVAL = (SV *)newRV_noinc ((SV *)av); + while (i--) + { + int h = *hv84++; + int v1 = *hv84++; + int v2 = *hv84++; + + av_push (av, newSViv (v1)); + av_push (av, newSViv ((h >> 4) * 255 / 15)); + av_push (av, newSViv (v2)); + av_push (av, newSViv ((h & 15) * 255 / 15)); + } +} + OUTPUT: + RETVAL