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Diffstat (limited to 'convert/gdk-pixbuf-convert.c')
| -rw-r--r-- | convert/gdk-pixbuf-convert.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/convert/gdk-pixbuf-convert.c b/convert/gdk-pixbuf-convert.c new file mode 100644 index 0000000..2bdbeca --- /dev/null +++ b/convert/gdk-pixbuf-convert.c @@ -0,0 +1,226 @@ +/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ + +/* + * gdk-pixbuf-convert.c gdk pixbuf replacement for convert geometry commands + * + * Copyright (C) 2003 Ximian Inc. + * + * Author: Larry Ewing <lewing@ximian.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + * build with + * gcc `pkg-config --cflags gdk-pixbuf-2.0` gdk-pixbuf-convert.c -o gdk-pixbuf-convert `pkg-config --libs gdk-pixbuf-2.0` + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <glib-object.h> + +#define d(x) x + +typedef enum { + SAVE_JPG, + SAVE_PNG +} OutputType; + +GdkPixbuf * +scale (GdkPixbuf *src, char *geom) +{ + GdkPixbuf *dest = NULL; + char *s, *e; + guint w; + guint h; + guint src_w, dest_w; + guint src_h, dest_h; + double scale_w = 1.0; + double scale_h = 1.0; + gboolean force = FALSE; + + src_w = gdk_pixbuf_get_width (src); + src_h = gdk_pixbuf_get_height (src); + + /* d(printf ("%d %d ", src_w, src_h);) */ + + s = e = geom; + + w = strtol (s, &e, 10); + /* d(printf ("%d ", w);) */ + if (e != s) { + scale_w = w / (double)src_w; + } else { + w = 100; + } + + + if (*e == 'x') + e++; + else + return NULL; + + s = e; + + h = strtol (s, &e, 10); + /* d(printf ("%d ", h);) */ + if (e != s) { + scale_h = h / (double)src_h; + } else { + h = 100; + } + + if (*e == '%') { + scale_h = h / 100.0; + scale_w = w / 100.0; + e++; + } + + /* d(printf ("%f %f\n", scale_w, scale_h);) */ + + while (*e) { + switch (*e) { + case '!': + force = TRUE; + break; + case '>': + if (scale_w >= 1.0 && scale_h >= 1.0) + scale_w = scale_h = 1.0; + break; + case '<': + if (scale_w < 1.0 || scale_h <= 1.0) + scale_w = scale_h = 1.0; + break; + default: + break; + } + e++; + } + + if (!force) { + /* Keep aspect ratio */ + scale_w = scale_h = MIN (scale_h, scale_w); + } + + dest_w = (int)(src_w * scale_w + 0.5); + dest_h = (int)(src_h * scale_h + 0.5); + + /* printf ("%dx%d\n", dest_w, dest_h); */ + + /* dest = gdk_pixbuf_scale_simple (src, dest_w, dest_h, GDK_INTERP_BILINEAR);*/ + dest = gdk_pixbuf_scale_simple (src, dest_w, dest_h, GDK_INTERP_HYPER); + + return dest; +} + +OutputType +get_filetype (char *filename) +{ + gint len = strlen (filename); + + if (len > 4 && g_ascii_strncasecmp (filename + len - 4, ".png", 4)== 0) + return SAVE_PNG; + else + return SAVE_JPG; +} + +int +convert (char *geom, char *quality, char *sfile, char *dfile) +{ + GdkPixbuf *src; + GdkPixbuf *dest; + GError *error = NULL; + + src = gdk_pixbuf_new_from_file (sfile, &error); + + if (!src) { + fprintf (stderr, "Unable to open input file"); + return 1; + } + + if (geom) { + dest = scale (src, geom); + } else { + dest = src; + g_object_ref (dest); + } + + if (!dest) + return 1; + + unlink (dfile); + if (get_filetype (dfile) == SAVE_JPG) + gdk_pixbuf_save (dest, dfile, "jpeg", &error, + "quality", quality, NULL); + else + gdk_pixbuf_save (dest, dfile, "png", &error, NULL); + + g_object_unref (src); + g_object_unref (dest); + + if (error) { + return 1; + } + + return 0; +} + +int +main (int argc, char **argv) +{ + char *dfile; + char *sfile; + char *geom = NULL; + char *quality = "100"; + + g_type_init (); + + if (argc > 4) { + int i = 1; + if (!g_ascii_strcasecmp (argv[i], "-geometry")) { + i++; + geom = argv[i++]; + if (argc < 5) + goto usage; + } + if (!g_ascii_strcasecmp (argv[i], "-quality")) { + i++; + quality = argv[i++]; + if (argc < 7) + goto usage; + if ((atoi(quality) < 0) || (atoi(quality) > 100)) { + g_print ("Value for '-quality' must be in range 0-100!\n"); + goto usage; + } + } + sfile = argv[i++]; + dfile = argv[i++]; + } else { + goto usage; + } + + return convert (geom, quality, sfile, dfile); + + usage: + g_print ("Usage:\n"); + g_print (" gdk-pixbuf-convert -geometry <X>x<Y> [-quality <0-100>] <input> <output>\n"); + g_print ("\n"); + g_print ("Example:\n"); + g_print (" gdk-pixbuf-convert -geometry 120x120 -quality 75 foo.jpg bar.jpg\n"); + exit (2); +} |