--- CV/CV.xs 2003/11/12 23:54:54 1.7 +++ CV/CV.xs 2005/07/20 06:20:36 1.17 @@ -2,12 +2,16 @@ #include "perl.h" #include "XSUB.h" +#include + +#include #include #include #include -#define IW 80 +#define IW 80 /* MUST match Schnauer.pm! */ +#define IH 60 /* MUST match Schnauer.pm! */ #define RAND (seed = (seed + 7141) * 54773 % 134456) @@ -15,6 +19,51 @@ #define ELLIPSIS "\xe2\x80\xa6" +struct jpg_err_mgr +{ + struct jpeg_error_mgr err; + jmp_buf setjmp_buffer; +}; + +static void +cv_error_exit (j_common_ptr cinfo) +{ + longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); +} + +static void +cv_error_output (j_common_ptr cinfo) +{ + return; +} + +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; + } +} + static guint32 a85_val; static guint a85_cnt; static guchar a85_buf[LINELENGTH], *a85_ptr; @@ -57,6 +106,7 @@ } +static void a85_finish (PerlIO *fp) { while (a85_cnt != 4) @@ -71,7 +121,7 @@ ///////////////////////////////////////////////////////////////////////////// -MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow +MODULE = Gtk2::CV PACKAGE = Gtk2::CV PROTOTYPES: ENABLE @@ -123,6 +173,99 @@ OUTPUT: RETVAL +GdkPixbuf_noinc * +load_jpeg (char *path, int thumbnail=0) + CODE: +{ + struct jpeg_decompress_struct cinfo; + struct jpg_err_mgr jerr; + guchar *data; + int rs; + FILE *fp; + volatile GdkPixbuf *pb = 0; + RETVAL = 0; + + if (!(fp = fopen (path, "rb"))) + XSRETURN_UNDEF; + + cinfo.err = jpeg_std_error (&jerr.err); + + jerr.err.error_exit = cv_error_exit; + jerr.err.output_message = cv_error_output; + + if ((rs = setjmp (jerr.setjmp_buffer))) + { + fclose (fp); + jpeg_destroy_decompress (&cinfo); + + if (pb) + g_object_unref ((gpointer)pb); + + XSRETURN_UNDEF; + } + + jpeg_create_decompress (&cinfo); + + jpeg_stdio_src (&cinfo, fp); + jpeg_read_header (&cinfo, TRUE); + + cinfo.dct_method = JDCT_DEFAULT; + cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ + cinfo.do_block_smoothing = FALSE; + cinfo.out_color_space = JCS_RGB; + cinfo.quantize_colors = FALSE; + + cinfo.scale_num = 1; + cinfo.scale_denom = 1; + + jpeg_calc_output_dimensions (&cinfo); + + if (thumbnail) + { + cinfo.dct_method = JDCT_FASTEST; + cinfo.do_fancy_upsampling = FALSE; + + while (cinfo.scale_denom < 8 + && (cinfo.output_width >> 1) >= IW + && (cinfo.output_height >> 1) >= IH) + { + cinfo.scale_denom <<= 1; + jpeg_calc_output_dimensions (&cinfo); + } + } + + pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); + if (!RETVAL) + longjmp (jerr.setjmp_buffer, 2); + + data = gdk_pixbuf_get_pixels (RETVAL); + rs = gdk_pixbuf_get_rowstride (RETVAL); + + if (cinfo.output_components != 3) + longjmp (jerr.setjmp_buffer, 3); + + jpeg_start_decompress (&cinfo); + + while (cinfo.output_scanline < cinfo.output_height) + { + int remaining = cinfo.output_height - cinfo.output_scanline; + JSAMPROW rp[4]; + + rp [0] = data + cinfo.output_scanline * rs; + rp [1] = (guchar *)rp [0] + rs; + rp [2] = (guchar *)rp [1] + rs; + rp [3] = (guchar *)rp [2] + rs; + + jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); + } + + jpeg_finish_decompress (&cinfo); + fclose (fp); + jpeg_destroy_decompress (&cinfo); +} + OUTPUT: + RETVAL + ############################################################################# MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer @@ -187,9 +330,9 @@ 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 = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255; + g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255; + b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255; r = r > 7 ? 7 : r < 0 ? 0 : r; g = g > 7 ? 7 : g < 0 ? 0 : g; @@ -199,9 +342,9 @@ 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; + Er[x] = er >> 1; er -= (er + 1) >> 1; + Eg[x] = eg >> 1; eg -= (eg + 1) >> 1; + Eb[x] = eb >> 1; eb -= (eb + 1) >> 1; *dst++ = r << 5 | g << 2 | b; } @@ -210,6 +353,60 @@ 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 @@ -254,6 +451,93 @@ 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