#include "EXTERN.h" #include "perl.h" #include "XSUB.h" #include #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[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 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 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) { int bigst, j; SV *sv = *av_fetch (av, i, 1); STRLEN len; char *buf = SvPVbyte (sv, len); int tmphist[256]; char *hist; SV *histsv = newSV (257); sv_upgrade (histsv, SVt_PV); SvCUR_set (histsv, 256); hist = SvPVX (histsv); Zero (tmphist, 256, int); while (len--) ++tmphist[(unsigned char)*buf++]; bigst = 1; for (j = 0; j < 256; ++j) if (tmphist[j] > bigst) bigst = tmphist[j]; for (j = 0; j < 256; ++j) hist[j] = tmphist[j] * 255 / bigst; av_push (result, histsv); } RETVAL = newRV_noinc ((SV *)result); } 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 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