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583db0f125
Wed May 5 23:09:48 2004 Matthias Clasen <maclas@gmx.de> * gdk-pixbuf-io.h (GdkPixbufFormatFlags): New format flag GDK_PIXBUF_FORMAT_SCALABLE to mark scalable formats. * gdk-pixbuf.h: * gdk-pixbuf-io.c (gdk_pixbuf_format_is_scalable): New function. (#137995, Dom Lachowicz)
1847 lines
48 KiB
C
1847 lines
48 KiB
C
/* -*- mode: C; c-file-style: "linux" -*- */
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/* GdkPixbuf library - Main loading interface.
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Miguel de Icaza <miguel@gnu.org>
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* Federico Mena-Quintero <federico@gimp.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "gdk-pixbuf-private.h"
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#include "gdk-pixbuf-io.h"
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#ifdef G_OS_WIN32
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#define STRICT
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#include <windows.h>
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#undef STRICT
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#endif
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static gint
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format_check (GdkPixbufModule *module, guchar *buffer, int size)
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{
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int j;
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gchar m;
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GdkPixbufModulePattern *pattern;
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for (pattern = module->info->signature; pattern->prefix; pattern++) {
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for (j = 0; j < size && pattern->prefix[j] != 0; j++) {
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m = pattern->mask ? pattern->mask[j] : ' ';
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if (m == ' ') {
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if (buffer[j] != pattern->prefix[j])
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break;
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}
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else if (m == '!') {
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if (buffer[j] == pattern->prefix[j])
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break;
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}
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else if (m == 'z') {
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if (buffer[j] != 0)
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break;
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}
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else if (m == 'n') {
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if (buffer[j] == 0)
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break;
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}
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}
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if (pattern->prefix[j] == 0)
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return pattern->relevance;
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}
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return 0;
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}
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static GSList *file_formats = NULL;
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static void gdk_pixbuf_io_init ();
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static GSList *
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get_file_formats ()
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{
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if (file_formats == NULL)
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gdk_pixbuf_io_init ();
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return file_formats;
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}
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#ifdef USE_GMODULE
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static gboolean
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scan_string (const char **pos, GString *out)
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{
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const char *p = *pos, *q = *pos;
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char *tmp, *tmp2;
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gboolean quoted;
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while (g_ascii_isspace (*p))
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p++;
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if (!*p)
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return FALSE;
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else if (*p == '"') {
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p++;
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quoted = FALSE;
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for (q = p; (*q != '"') || quoted; q++) {
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if (!*q)
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return FALSE;
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quoted = (*q == '\\') && !quoted;
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}
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tmp = g_strndup (p, q - p);
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tmp2 = g_strcompress (tmp);
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g_string_truncate (out, 0);
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g_string_append (out, tmp2);
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g_free (tmp);
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g_free (tmp2);
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}
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q++;
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*pos = q;
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return TRUE;
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}
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static gboolean
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scan_int (const char **pos, int *out)
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{
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int i = 0;
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char buf[32];
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const char *p = *pos;
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while (g_ascii_isspace (*p))
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p++;
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if (*p < '0' || *p > '9')
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return FALSE;
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while ((*p >= '0') && (*p <= '9') && i < sizeof (buf)) {
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buf[i] = *p;
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i++;
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p++;
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}
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if (i == sizeof (buf))
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return FALSE;
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else
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buf[i] = '\0';
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*out = atoi (buf);
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*pos = p;
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return TRUE;
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}
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static gboolean
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skip_space (const char **pos)
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{
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const char *p = *pos;
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while (g_ascii_isspace (*p))
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p++;
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*pos = p;
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return !(*p == '\0');
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}
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#ifdef G_OS_WIN32
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/* DllMain function needed to tuck away the gdk-pixbuf DLL name */
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G_WIN32_DLLMAIN_FOR_DLL_NAME (static, dll_name)
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static char *
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get_toplevel (void)
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{
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static char *toplevel = NULL;
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if (toplevel == NULL)
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toplevel = g_win32_get_package_installation_subdirectory
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(GETTEXT_PACKAGE, dll_name, "");
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return toplevel;
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}
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static char *
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get_sysconfdir (void)
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{
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static char *sysconfdir = NULL;
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if (sysconfdir == NULL)
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sysconfdir = g_win32_get_package_installation_subdirectory
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(GETTEXT_PACKAGE, dll_name, "etc");
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return sysconfdir;
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}
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#undef GTK_SYSCONFDIR
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#define GTK_SYSCONFDIR get_sysconfdir()
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static void
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correct_prefix (gchar **path)
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{
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if (strncmp (*path, GTK_PREFIX "/", strlen (GTK_PREFIX "/")) == 0 ||
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strncmp (*path, GTK_PREFIX "\\", strlen (GTK_PREFIX "\\")) == 0)
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{
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/* This is an entry put there by gdk-pixbuf-query-loaders on the
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* packager's system. On Windows a prebuilt GTK+ package can be
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* installed in a random location. The gdk-pixbuf.loaders file
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* distributed in such a package contains paths from the package
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* builder's machine. Replace the build-time prefix with the
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* installation prefix on this machine.
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*/
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gchar *tem = *path;
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*path = g_strconcat (get_toplevel (), tem + strlen (GTK_PREFIX), NULL);
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g_free (tem);
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}
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}
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#endif
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static gchar *
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gdk_pixbuf_get_module_file (void)
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{
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gchar *result = g_strdup (g_getenv ("GDK_PIXBUF_MODULE_FILE"));
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if (!result)
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result = g_build_filename (GTK_SYSCONFDIR, "gtk-2.0", "gdk-pixbuf.loaders", NULL);
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return result;
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}
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static void
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gdk_pixbuf_io_init ()
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{
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GIOChannel *channel;
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gchar *line_buf;
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gsize term;
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GString *tmp_buf = g_string_new (NULL);
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gboolean have_error = FALSE;
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GdkPixbufModule *module = NULL;
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gchar *filename = gdk_pixbuf_get_module_file ();
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int flags;
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int n_patterns = 0;
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GdkPixbufModulePattern *pattern;
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GError *error = NULL;
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channel = g_io_channel_new_file (filename, "r", &error);
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if (!channel) {
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g_warning ("Can not open pixbuf loader module file '%s': %s",
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filename, error->message);
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return;
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}
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while (!have_error && g_io_channel_read_line (channel, &line_buf, NULL, &term, NULL) == G_IO_STATUS_NORMAL) {
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const char *p;
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p = line_buf;
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line_buf[term] = 0;
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if (!skip_space (&p)) {
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/* Blank line marking the end of a module
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*/
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if (module && *p != '#') {
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#ifdef G_OS_WIN32
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correct_prefix (&module->module_path);
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#endif
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file_formats = g_slist_prepend (file_formats, module);
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module = NULL;
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}
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goto next_line;
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}
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if (*p == '#')
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goto next_line;
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if (!module) {
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/* Read a module location
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*/
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module = g_new0 (GdkPixbufModule, 1);
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n_patterns = 0;
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if (!scan_string (&p, tmp_buf)) {
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g_warning ("Error parsing loader info in '%s'\n %s",
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filename, line_buf);
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have_error = TRUE;
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}
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module->module_path = g_strdup (tmp_buf->str);
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}
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else if (!module->module_name) {
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module->info = g_new0 (GdkPixbufFormat, 1);
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if (!scan_string (&p, tmp_buf)) {
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g_warning ("Error parsing loader info in '%s'\n %s",
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filename, line_buf);
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have_error = TRUE;
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}
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module->info->name = g_strdup (tmp_buf->str);
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module->module_name = module->info->name;
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if (!scan_int (&p, &flags)) {
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g_warning ("Error parsing loader info in '%s'\n %s",
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filename, line_buf);
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have_error = TRUE;
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}
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module->info->flags = flags;
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if (!scan_string (&p, tmp_buf)) {
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g_warning ("Error parsing loader info in '%s'\n %s",
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filename, line_buf);
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have_error = TRUE;
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}
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if (tmp_buf->str[0] != 0)
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module->info->domain = g_strdup (tmp_buf->str);
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if (!scan_string (&p, tmp_buf)) {
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g_warning ("Error parsing loader info in '%s'\n %s",
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filename, line_buf);
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have_error = TRUE;
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}
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module->info->description = g_strdup (tmp_buf->str);
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}
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else if (!module->info->mime_types) {
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int n = 1;
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module->info->mime_types = g_new0 (gchar*, 1);
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while (scan_string (&p, tmp_buf)) {
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if (tmp_buf->str[0] != 0) {
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module->info->mime_types =
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g_realloc (module->info->mime_types, (n + 1) * sizeof (gchar*));
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module->info->mime_types[n - 1] = g_strdup (tmp_buf->str);
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module->info->mime_types[n] = 0;
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n++;
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}
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}
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}
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else if (!module->info->extensions) {
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int n = 1;
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module->info->extensions = g_new0 (gchar*, 1);
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while (scan_string (&p, tmp_buf)) {
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if (tmp_buf->str[0] != 0) {
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module->info->extensions =
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g_realloc (module->info->extensions, (n + 1) * sizeof (gchar*));
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module->info->extensions[n - 1] = g_strdup (tmp_buf->str);
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module->info->extensions[n] = 0;
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n++;
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}
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}
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}
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else {
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n_patterns++;
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module->info->signature = (GdkPixbufModulePattern *)
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g_realloc (module->info->signature, (n_patterns + 1) * sizeof (GdkPixbufModulePattern));
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pattern = module->info->signature + n_patterns;
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pattern->prefix = NULL;
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pattern->mask = NULL;
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pattern->relevance = 0;
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pattern--;
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if (!scan_string (&p, tmp_buf))
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goto context_error;
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pattern->prefix = g_strdup (tmp_buf->str);
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|
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if (!scan_string (&p, tmp_buf))
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goto context_error;
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if (*tmp_buf->str)
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pattern->mask = g_strdup (tmp_buf->str);
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else
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pattern->mask = NULL;
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|
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if (!scan_int (&p, &pattern->relevance))
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goto context_error;
|
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|
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goto next_line;
|
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|
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context_error:
|
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g_free (pattern->prefix);
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g_free (pattern->mask);
|
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g_free (pattern);
|
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g_warning ("Error parsing loader info in '%s'\n %s",
|
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filename, line_buf);
|
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have_error = TRUE;
|
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}
|
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next_line:
|
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g_free (line_buf);
|
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}
|
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g_string_free (tmp_buf, TRUE);
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g_io_channel_unref (channel);
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g_free (filename);
|
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}
|
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|
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/* actually load the image handler - gdk_pixbuf_get_module only get a */
|
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/* reference to the module to load, it doesn't actually load it */
|
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/* perhaps these actions should be combined in one function */
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gboolean
|
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_gdk_pixbuf_load_module (GdkPixbufModule *image_module,
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GError **error)
|
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{
|
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char *path;
|
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GModule *module;
|
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gpointer sym;
|
||
|
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g_return_val_if_fail (image_module->module == NULL, FALSE);
|
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|
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path = image_module->module_path;
|
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module = g_module_open (path, G_MODULE_BIND_LAZY);
|
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|
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if (!module) {
|
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g_set_error (error,
|
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GDK_PIXBUF_ERROR,
|
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GDK_PIXBUF_ERROR_FAILED,
|
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_("Unable to load image-loading module: %s: %s"),
|
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path, g_module_error ());
|
||
return FALSE;
|
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}
|
||
|
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image_module->module = module;
|
||
|
||
if (g_module_symbol (module, "fill_vtable", &sym)) {
|
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GdkPixbufModuleFillVtableFunc func = (GdkPixbufModuleFillVtableFunc) sym;
|
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(* func) (image_module);
|
||
return TRUE;
|
||
} else {
|
||
g_set_error (error,
|
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GDK_PIXBUF_ERROR,
|
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GDK_PIXBUF_ERROR_FAILED,
|
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_("Image-loading module %s does not export the proper interface; perhaps it's from a different GTK version?"),
|
||
path);
|
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return FALSE;
|
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}
|
||
}
|
||
#else
|
||
|
||
#define module(type) \
|
||
extern void MODULE_ENTRY (type, fill_info) (GdkPixbufFormat *info); \
|
||
extern void MODULE_ENTRY (type, fill_vtable) (GdkPixbufModule *module)
|
||
|
||
module (png);
|
||
module (bmp);
|
||
module (wbmp);
|
||
module (gif);
|
||
module (ico);
|
||
module (ani);
|
||
module (jpeg);
|
||
module (pnm);
|
||
module (ras);
|
||
module (tiff);
|
||
module (xpm);
|
||
module (xbm);
|
||
module (tga);
|
||
module (pcx);
|
||
|
||
gboolean
|
||
_gdk_pixbuf_load_module (GdkPixbufModule *image_module,
|
||
GError **error)
|
||
{
|
||
GdkPixbufModuleFillInfoFunc fill_info = NULL;
|
||
GdkPixbufModuleFillVtableFunc fill_vtable = NULL;
|
||
|
||
image_module->module = (void *) 1;
|
||
|
||
if (FALSE) {
|
||
/* Ugly hack so we can use else if unconditionally below ;-) */
|
||
}
|
||
|
||
#ifdef INCLUDE_png
|
||
else if (strcmp (image_module->module_name, "png") == 0) {
|
||
fill_info = MODULE_ENTRY (png, fill_info);
|
||
fill_vtable = MODULE_ENTRY (png, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_bmp
|
||
else if (strcmp (image_module->module_name, "bmp") == 0) {
|
||
fill_info = MODULE_ENTRY (bmp, fill_info);
|
||
fill_vtable = MODULE_ENTRY (bmp, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_wbmp
|
||
else if (strcmp (image_module->module_name, "wbmp") == 0) {
|
||
fill_info = MODULE_ENTRY (wbmp, fill_info);
|
||
fill_vtable = MODULE_ENTRY (wbmp, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_gif
|
||
else if (strcmp (image_module->module_name, "gif") == 0) {
|
||
fill_info = MODULE_ENTRY (gif, fill_info);
|
||
fill_vtable = MODULE_ENTRY (gif, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_ico
|
||
else if (strcmp (image_module->module_name, "ico") == 0) {
|
||
fill_info = MODULE_ENTRY (ico, fill_info);
|
||
fill_vtable = MODULE_ENTRY (ico, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_ani
|
||
else if (strcmp (image_module->module_name, "ani") == 0) {
|
||
fill_info = MODULE_ENTRY (ani, fill_info);
|
||
fill_vtable = MODULE_ENTRY (ani, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_jpeg
|
||
else if (strcmp (image_module->module_name, "jpeg") == 0) {
|
||
fill_info = MODULE_ENTRY (jpeg, fill_info);
|
||
fill_vtable = MODULE_ENTRY (jpeg, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_pnm
|
||
else if (strcmp (image_module->module_name, "pnm") == 0) {
|
||
fill_info = MODULE_ENTRY (pnm, fill_info);
|
||
fill_vtable = MODULE_ENTRY (pnm, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_ras
|
||
else if (strcmp (image_module->module_name, "ras") == 0) {
|
||
fill_info = MODULE_ENTRY (ras, fill_info);
|
||
fill_vtable = MODULE_ENTRY (ras, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_tiff
|
||
else if (strcmp (image_module->module_name, "tiff") == 0) {
|
||
fill_info = MODULE_ENTRY (tiff, fill_info);
|
||
fill_vtable = MODULE_ENTRY (tiff, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_xpm
|
||
else if (strcmp (image_module->module_name, "xpm") == 0) {
|
||
fill_info = MODULE_ENTRY (xpm, fill_info);
|
||
fill_vtable = MODULE_ENTRY (xpm, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_xbm
|
||
else if (strcmp (image_module->module_name, "xbm") == 0) {
|
||
fill_info = MODULE_ENTRY (xbm, fill_info);
|
||
fill_vtable = MODULE_ENTRY (xbm, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_tga
|
||
else if (strcmp (image_module->module_name, "tga") == 0) {
|
||
fill_info = MODULE_ENTRY (tga, fill_info);
|
||
fill_vtable = MODULE_ENTRY (tga, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
#ifdef INCLUDE_pcx
|
||
else if (strcmp (image_module->module_name, "pcx") == 0) {
|
||
fill_info = MODULE_ENTRY (pcx, fill_info);
|
||
fill_vtable = MODULE_ENTRY (pcx, fill_vtable);
|
||
}
|
||
#endif
|
||
|
||
if (fill_vtable) {
|
||
(* fill_vtable) (image_module);
|
||
image_module->info = g_new0 (GdkPixbufFormat, 1);
|
||
(* fill_info) (image_module->info);
|
||
|
||
return TRUE;
|
||
} else {
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
||
_("Image type '%s' is not supported"),
|
||
image_module->module_name);
|
||
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gdk_pixbuf_io_init ()
|
||
{
|
||
gchar *included_formats[] = {
|
||
"ani", "png", "bmp", "wbmp", "gif",
|
||
"ico", "jpeg", "pnm", "ras", "tiff",
|
||
"xpm", "xbm", "tga", "pcx",
|
||
NULL
|
||
};
|
||
gchar **name;
|
||
GdkPixbufModule *module = NULL;
|
||
|
||
for (name = included_formats; *name; name++) {
|
||
module = g_new0 (GdkPixbufModule, 1);
|
||
module->module_name = *name;
|
||
if (_gdk_pixbuf_load_module (module, NULL))
|
||
file_formats = g_slist_prepend (file_formats, module);
|
||
else
|
||
g_free (module);
|
||
}
|
||
}
|
||
|
||
#endif
|
||
|
||
|
||
|
||
GdkPixbufModule *
|
||
_gdk_pixbuf_get_named_module (const char *name,
|
||
GError **error)
|
||
{
|
||
GSList *modules;
|
||
|
||
for (modules = get_file_formats (); modules; modules = g_slist_next (modules)) {
|
||
GdkPixbufModule *module = (GdkPixbufModule *)modules->data;
|
||
if (!strcmp (name, module->module_name))
|
||
return module;
|
||
}
|
||
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
||
_("Image type '%s' is not supported"),
|
||
name);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
GdkPixbufModule *
|
||
_gdk_pixbuf_get_module (guchar *buffer, guint size,
|
||
const gchar *filename,
|
||
GError **error)
|
||
{
|
||
GSList *modules;
|
||
|
||
gint score, best = 0;
|
||
GdkPixbufModule *selected = NULL;
|
||
for (modules = get_file_formats (); modules; modules = g_slist_next (modules)) {
|
||
GdkPixbufModule *module = (GdkPixbufModule *)modules->data;
|
||
score = format_check (module, buffer, size);
|
||
if (score > best) {
|
||
best = score;
|
||
selected = module;
|
||
}
|
||
if (score >= 100)
|
||
break;
|
||
}
|
||
if (selected != NULL)
|
||
return selected;
|
||
|
||
if (filename)
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
||
_("Couldn't recognize the image file format for file '%s'"),
|
||
filename);
|
||
else
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
||
_("Unrecognized image file format"));
|
||
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static void
|
||
prepared_notify (GdkPixbuf *pixbuf,
|
||
GdkPixbufAnimation *anim,
|
||
gpointer user_data)
|
||
{
|
||
if (pixbuf != NULL)
|
||
g_object_ref (pixbuf);
|
||
*((GdkPixbuf **)user_data) = pixbuf;
|
||
}
|
||
|
||
GdkPixbuf *
|
||
_gdk_pixbuf_generic_image_load (GdkPixbufModule *module,
|
||
FILE *f,
|
||
GError **error)
|
||
{
|
||
guchar buffer[4096];
|
||
size_t length;
|
||
GdkPixbuf *pixbuf = NULL;
|
||
GdkPixbufAnimation *animation = NULL;
|
||
gpointer context;
|
||
|
||
if (module->load != NULL)
|
||
return (* module->load) (f, error);
|
||
|
||
if (module->begin_load != NULL) {
|
||
|
||
context = module->begin_load (NULL, prepared_notify, NULL, &pixbuf, error);
|
||
|
||
if (!context)
|
||
return NULL;
|
||
|
||
while (!feof (f) && !ferror (f)) {
|
||
length = fread (buffer, 1, sizeof (buffer), f);
|
||
if (length > 0)
|
||
if (!module->load_increment (context, buffer, length, error)) {
|
||
module->stop_load (context, NULL);
|
||
if (pixbuf != NULL)
|
||
g_object_unref (pixbuf);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
if (!module->stop_load (context, error)) {
|
||
if (pixbuf != NULL)
|
||
g_object_unref (pixbuf);
|
||
return NULL;
|
||
}
|
||
|
||
return pixbuf;
|
||
}
|
||
|
||
if (module->load_animation != NULL) {
|
||
animation = (* module->load_animation) (f, error);
|
||
if (animation != NULL) {
|
||
pixbuf = gdk_pixbuf_animation_get_static_image (animation);
|
||
|
||
g_object_ref (pixbuf);
|
||
|
||
g_object_unref (animation);
|
||
|
||
return pixbuf;
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_new_from_file:
|
||
* @filename: Name of file to load.
|
||
* @error: Return location for an error
|
||
*
|
||
* Creates a new pixbuf by loading an image from a file. The file format is
|
||
* detected automatically. If %NULL is returned, then @error will be set.
|
||
* Possible errors are in the #GDK_PIXBUF_ERROR and #G_FILE_ERROR domains.
|
||
*
|
||
* Return value: A newly-created pixbuf with a reference count of 1, or %NULL if
|
||
* any of several error conditions occurred: the file could not be opened,
|
||
* there was no loader for the file's format, there was not enough memory to
|
||
* allocate the image buffer, or the image file contained invalid data.
|
||
**/
|
||
GdkPixbuf *
|
||
gdk_pixbuf_new_from_file (const char *filename,
|
||
GError **error)
|
||
{
|
||
GdkPixbuf *pixbuf;
|
||
int size;
|
||
FILE *f;
|
||
guchar buffer [128];
|
||
GdkPixbufModule *image_module;
|
||
|
||
g_return_val_if_fail (filename != NULL, NULL);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
||
|
||
f = fopen (filename, "rb");
|
||
if (!f) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Failed to open file '%s': %s"),
|
||
filename, g_strerror (errno));
|
||
return NULL;
|
||
}
|
||
|
||
size = fread (&buffer, 1, sizeof (buffer), f);
|
||
if (size == 0) {
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
|
||
_("Image file '%s' contains no data"),
|
||
filename);
|
||
|
||
fclose (f);
|
||
return NULL;
|
||
}
|
||
|
||
image_module = _gdk_pixbuf_get_module (buffer, size, filename, error);
|
||
if (image_module == NULL) {
|
||
fclose (f);
|
||
return NULL;
|
||
}
|
||
|
||
if (image_module->module == NULL)
|
||
if (!_gdk_pixbuf_load_module (image_module, error)) {
|
||
fclose (f);
|
||
return NULL;
|
||
}
|
||
|
||
fseek (f, 0, SEEK_SET);
|
||
pixbuf = _gdk_pixbuf_generic_image_load (image_module, f, error);
|
||
fclose (f);
|
||
|
||
if (pixbuf == NULL && error != NULL && *error == NULL) {
|
||
/* I don't trust these crufty longjmp()'ing image libs
|
||
* to maintain proper error invariants, and I don't
|
||
* want user code to segfault as a result. We need to maintain
|
||
* the invariastable/gdk-pixbuf/nt that error gets set if NULL is returned.
|
||
*/
|
||
|
||
g_warning ("Bug! gdk-pixbuf loader '%s' didn't set an error on failure.", image_module->module_name);
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_FAILED,
|
||
_("Failed to load image '%s': reason not known, probably a corrupt image file"),
|
||
filename);
|
||
|
||
} else if (error != NULL && *error != NULL) {
|
||
|
||
/* Add the filename to the error message */
|
||
GError *e = *error;
|
||
gchar *old;
|
||
|
||
old = e->message;
|
||
|
||
e->message = g_strdup_printf (_("Failed to load image '%s': %s"),
|
||
filename, old);
|
||
|
||
g_free (old);
|
||
}
|
||
|
||
return pixbuf;
|
||
}
|
||
|
||
static void
|
||
size_prepared_cb (GdkPixbufLoader *loader,
|
||
int width,
|
||
int height,
|
||
gpointer data)
|
||
{
|
||
struct {
|
||
int width;
|
||
int height;
|
||
} *info = data;
|
||
|
||
g_return_if_fail (width > 0 && height > 0);
|
||
|
||
if ((double)height * (double)info->width >
|
||
(double)width * (double)info->height) {
|
||
width = 0.5 + (double)width * (double)info->height / (double)height;
|
||
height = info->height;
|
||
} else {
|
||
height = 0.5 + (double)height * (double)info->width / (double)width;
|
||
width = info->width;
|
||
}
|
||
|
||
gdk_pixbuf_loader_set_size (loader, width, height);
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_new_from_file_at_size:
|
||
* @filename: Name of file to load.
|
||
* @width: The width the image should have
|
||
* @height: The height the image should have
|
||
* @error: Return location for an error
|
||
*
|
||
* Creates a new pixbuf by loading an image from a file. The file format is
|
||
* detected automatically. If %NULL is returned, then @error will be set.
|
||
* Possible errors are in the #GDK_PIXBUF_ERROR and #G_FILE_ERROR domains.
|
||
* The image will be scaled to fit in the requested size, preserving its aspect ratio.
|
||
*
|
||
* Return value: A newly-created pixbuf with a reference count of 1, or %NULL if
|
||
* any of several error conditions occurred: the file could not be opened,
|
||
* there was no loader for the file's format, there was not enough memory to
|
||
* allocate the image buffer, or the image file contained invalid data.
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
GdkPixbuf *
|
||
gdk_pixbuf_new_from_file_at_size (const char *filename,
|
||
int width,
|
||
int height,
|
||
GError **error)
|
||
{
|
||
GdkPixbufLoader *loader;
|
||
GdkPixbuf *pixbuf;
|
||
|
||
guchar buffer [4096];
|
||
int length;
|
||
FILE *f;
|
||
struct {
|
||
gint width;
|
||
gint height;
|
||
} info;
|
||
|
||
g_return_val_if_fail (filename != NULL, NULL);
|
||
g_return_val_if_fail (width > 0 && height > 0, NULL);
|
||
|
||
f = fopen (filename, "rb");
|
||
if (!f) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Failed to open file '%s': %s"),
|
||
filename, g_strerror (errno));
|
||
return NULL;
|
||
}
|
||
|
||
loader = gdk_pixbuf_loader_new ();
|
||
|
||
info.width = width;
|
||
info.height = height;
|
||
|
||
g_signal_connect (loader, "size-prepared", G_CALLBACK (size_prepared_cb), &info);
|
||
|
||
while (!feof (f) && !ferror (f)) {
|
||
length = fread (buffer, 1, sizeof (buffer), f);
|
||
if (length > 0)
|
||
if (!gdk_pixbuf_loader_write (loader, buffer, length, error)) {
|
||
gdk_pixbuf_loader_close (loader, NULL);
|
||
fclose (f);
|
||
g_object_unref (loader);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
fclose (f);
|
||
|
||
if (!gdk_pixbuf_loader_close (loader, error)) {
|
||
g_object_unref (loader);
|
||
return NULL;
|
||
}
|
||
|
||
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
|
||
|
||
if (!pixbuf) {
|
||
g_object_unref (loader);
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_FAILED,
|
||
_("Failed to load image '%s': reason not known, probably a corrupt image file"),
|
||
filename);
|
||
return NULL;
|
||
}
|
||
|
||
g_object_ref (pixbuf);
|
||
|
||
g_object_unref (loader);
|
||
|
||
return pixbuf;
|
||
}
|
||
|
||
static void
|
||
info_cb (GdkPixbufLoader *loader,
|
||
int width,
|
||
int height,
|
||
gpointer data)
|
||
{
|
||
struct {
|
||
GdkPixbufFormat *format;
|
||
int width;
|
||
int height;
|
||
} *info = data;
|
||
|
||
g_return_if_fail (width > 0 && height > 0);
|
||
|
||
info->format = gdk_pixbuf_loader_get_format (loader);
|
||
info->width = width;
|
||
info->height = height;
|
||
|
||
gdk_pixbuf_loader_set_size (loader, 0, 0);
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_get_file_info:
|
||
* @filename: The name of the file to identify.
|
||
* @width: Return location for the width of the image, or %NULL
|
||
* @height: Return location for the height of the image, or %NULL
|
||
*
|
||
* Parses an image file far enough to determine its format and size.
|
||
*
|
||
* Returns: A #GdkPixbufFormat describing the image format of the file
|
||
* or %NULL if the image format wasn't recognized. The return value
|
||
* is owned by GdkPixbuf and should not be freed.
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
GdkPixbufFormat *
|
||
gdk_pixbuf_get_file_info (const gchar *filename,
|
||
gint *width,
|
||
gint *height)
|
||
{
|
||
GdkPixbufLoader *loader;
|
||
guchar buffer [4096];
|
||
int length;
|
||
FILE *f;
|
||
struct {
|
||
GdkPixbufFormat *format;
|
||
gint width;
|
||
gint height;
|
||
} info;
|
||
|
||
g_return_val_if_fail (filename != NULL, NULL);
|
||
|
||
f = fopen (filename, "rb");
|
||
if (!f)
|
||
return NULL;
|
||
|
||
loader = gdk_pixbuf_loader_new ();
|
||
|
||
info.format = NULL;
|
||
info.width = -1;
|
||
info.height = -1;
|
||
|
||
g_signal_connect (loader, "size-prepared", G_CALLBACK (info_cb), &info);
|
||
|
||
while (!feof (f) && !ferror (f)) {
|
||
length = fread (buffer, 1, sizeof (buffer), f);
|
||
if (length > 0) {
|
||
if (!gdk_pixbuf_loader_write (loader, buffer, length, NULL))
|
||
break;
|
||
}
|
||
if (info.format != NULL)
|
||
break;
|
||
}
|
||
|
||
fclose (f);
|
||
gdk_pixbuf_loader_close (loader, NULL);
|
||
g_object_unref (loader);
|
||
|
||
if (width)
|
||
*width = info.width;
|
||
if (height)
|
||
*height = info.height;
|
||
|
||
return info.format;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_new_from_xpm_data:
|
||
* @data: Pointer to inline XPM data.
|
||
*
|
||
* Creates a new pixbuf by parsing XPM data in memory. This data is commonly
|
||
* the result of including an XPM file into a program's C source.
|
||
*
|
||
* Return value: A newly-created pixbuf with a reference count of 1.
|
||
**/
|
||
GdkPixbuf *
|
||
gdk_pixbuf_new_from_xpm_data (const char **data)
|
||
{
|
||
GdkPixbuf *(* load_xpm_data) (const char **data);
|
||
GdkPixbuf *pixbuf;
|
||
GError *error = NULL;
|
||
GdkPixbufModule *xpm_module = _gdk_pixbuf_get_named_module ("xpm", &error);
|
||
if (xpm_module == NULL) {
|
||
g_warning ("Error loading XPM image loader: %s", error->message);
|
||
g_error_free (error);
|
||
return NULL;
|
||
}
|
||
|
||
if (xpm_module->module == NULL) {
|
||
if (!_gdk_pixbuf_load_module (xpm_module, &error)) {
|
||
g_warning ("Error loading XPM image loader: %s", error->message);
|
||
g_error_free (error);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
if (xpm_module->load_xpm_data == NULL) {
|
||
g_warning ("gdk-pixbuf XPM module lacks XPM data capability");
|
||
return NULL;
|
||
} else
|
||
load_xpm_data = xpm_module->load_xpm_data;
|
||
|
||
pixbuf = (* load_xpm_data) (data);
|
||
return pixbuf;
|
||
}
|
||
|
||
static void
|
||
collect_save_options (va_list opts,
|
||
gchar ***keys,
|
||
gchar ***vals)
|
||
{
|
||
gchar *key;
|
||
gchar *val;
|
||
gchar *next;
|
||
gint count;
|
||
|
||
count = 0;
|
||
*keys = NULL;
|
||
*vals = NULL;
|
||
|
||
next = va_arg (opts, gchar*);
|
||
while (next)
|
||
{
|
||
key = next;
|
||
val = va_arg (opts, gchar*);
|
||
|
||
++count;
|
||
|
||
/* woo, slow */
|
||
*keys = g_realloc (*keys, sizeof(gchar*) * (count + 1));
|
||
*vals = g_realloc (*vals, sizeof(gchar*) * (count + 1));
|
||
|
||
(*keys)[count-1] = g_strdup (key);
|
||
(*vals)[count-1] = g_strdup (val);
|
||
|
||
(*keys)[count] = NULL;
|
||
(*vals)[count] = NULL;
|
||
|
||
next = va_arg (opts, gchar*);
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
save_to_file_callback (const gchar *buf,
|
||
gsize count,
|
||
GError **error,
|
||
gpointer data)
|
||
{
|
||
FILE *filehandle = data;
|
||
gsize n;
|
||
|
||
n = fwrite (buf, 1, count, filehandle);
|
||
if (n != count) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Error writing to image file: %s"),
|
||
g_strerror (errno));
|
||
return FALSE;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
static gboolean
|
||
gdk_pixbuf_real_save (GdkPixbuf *pixbuf,
|
||
FILE *filehandle,
|
||
const char *type,
|
||
gchar **keys,
|
||
gchar **values,
|
||
GError **error)
|
||
{
|
||
GdkPixbufModule *image_module = NULL;
|
||
|
||
image_module = _gdk_pixbuf_get_named_module (type, error);
|
||
|
||
if (image_module == NULL)
|
||
return FALSE;
|
||
|
||
if (image_module->module == NULL)
|
||
if (!_gdk_pixbuf_load_module (image_module, error))
|
||
return FALSE;
|
||
|
||
if (image_module->save) {
|
||
/* save normally */
|
||
return (* image_module->save) (filehandle, pixbuf,
|
||
keys, values,
|
||
error);
|
||
}
|
||
else if (image_module->save_to_callback) {
|
||
/* save with simple callback */
|
||
return (* image_module->save_to_callback) (save_to_file_callback,
|
||
filehandle, pixbuf,
|
||
keys, values,
|
||
error);
|
||
}
|
||
else {
|
||
/* can't save */
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
|
||
_("This build of gdk-pixbuf does not support saving the image format: %s"),
|
||
type);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
#define TMP_FILE_BUF_SIZE 4096
|
||
|
||
static gboolean
|
||
save_to_callback_with_tmp_file (GdkPixbufModule *image_module,
|
||
GdkPixbuf *pixbuf,
|
||
GdkPixbufSaveFunc save_func,
|
||
gpointer user_data,
|
||
gchar **keys,
|
||
gchar **values,
|
||
GError **error)
|
||
{
|
||
int fd;
|
||
FILE *f = NULL;
|
||
gboolean retval = FALSE;
|
||
gchar *buf = NULL;
|
||
gsize n;
|
||
gchar *filename = NULL;
|
||
|
||
buf = g_try_malloc (TMP_FILE_BUF_SIZE);
|
||
if (buf == NULL) {
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
||
_("Insufficient memory to save image to callback"));
|
||
goto end;
|
||
}
|
||
|
||
fd = g_file_open_tmp ("gdkpixbuf-save-tmp.XXXXXX", &filename, error);
|
||
if (fd == -1)
|
||
goto end;
|
||
f = fdopen (fd, "wb+");
|
||
if (f == NULL) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Failed to open temporary file"));
|
||
goto end;
|
||
}
|
||
if (!(* image_module->save) (f, pixbuf, keys, values, error))
|
||
goto end;
|
||
rewind (f);
|
||
for (;;) {
|
||
n = fread (buf, 1, TMP_FILE_BUF_SIZE, f);
|
||
if (n > 0) {
|
||
if (!save_func (buf, n, error, user_data))
|
||
goto end;
|
||
}
|
||
if (n != TMP_FILE_BUF_SIZE)
|
||
break;
|
||
}
|
||
if (ferror (f)) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Failed to read from temporary file"));
|
||
goto end;
|
||
}
|
||
retval = TRUE;
|
||
|
||
end:
|
||
/* cleanup and return retval */
|
||
if (f)
|
||
fclose (f);
|
||
if (filename) {
|
||
unlink (filename);
|
||
g_free (filename);
|
||
}
|
||
g_free (buf);
|
||
|
||
return retval;
|
||
}
|
||
|
||
static gboolean
|
||
gdk_pixbuf_real_save_to_callback (GdkPixbuf *pixbuf,
|
||
GdkPixbufSaveFunc save_func,
|
||
gpointer user_data,
|
||
const char *type,
|
||
gchar **keys,
|
||
gchar **values,
|
||
GError **error)
|
||
{
|
||
GdkPixbufModule *image_module = NULL;
|
||
|
||
image_module = _gdk_pixbuf_get_named_module (type, error);
|
||
|
||
if (image_module == NULL)
|
||
return FALSE;
|
||
|
||
if (image_module->module == NULL)
|
||
if (!_gdk_pixbuf_load_module (image_module, error))
|
||
return FALSE;
|
||
|
||
if (image_module->save_to_callback) {
|
||
/* save normally */
|
||
return (* image_module->save_to_callback) (save_func, user_data,
|
||
pixbuf, keys, values,
|
||
error);
|
||
}
|
||
else if (image_module->save) {
|
||
/* use a temporary file */
|
||
return save_to_callback_with_tmp_file (image_module, pixbuf,
|
||
save_func, user_data,
|
||
keys, values,
|
||
error);
|
||
}
|
||
else {
|
||
/* can't save */
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
|
||
_("This build of gdk-pixbuf does not support saving the image format: %s"),
|
||
type);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* gdk_pixbuf_save:
|
||
* @pixbuf: a #GdkPixbuf.
|
||
* @filename: name of file to save.
|
||
* @type: name of file format.
|
||
* @error: return location for error, or %NULL
|
||
* @Varargs: list of key-value save options
|
||
*
|
||
* Saves pixbuf to a file in format @type. By default, "jpeg", "png" and
|
||
* "ico" are possible file formats to save in, but more formats may be
|
||
* installed. The list of all writable formats can be determined in the
|
||
* following way:
|
||
*
|
||
* <informalexample><programlisting>
|
||
* void add_if_writable (GdkPixbufFormat *data, GSList **list)
|
||
* {
|
||
* if (gdk_pixbuf_format_is_writable (data))
|
||
* *list = g_slist_prepend (*list, data);
|
||
* }
|
||
* <!-- -->
|
||
* GSList *formats = gdk_pixbuf_get_formats (<!-- -->);
|
||
* GSList *writable_formats = NULL;
|
||
* g_slist_foreach (formats, add_if_writable, &writable_formats);
|
||
* g_slist_free (formats);
|
||
* </programlisting></informalexample>
|
||
*
|
||
* If @error is set, %FALSE will be returned. Possible errors include
|
||
* those in the #GDK_PIXBUF_ERROR domain and those in the #G_FILE_ERROR domain.
|
||
*
|
||
* The variable argument list should be %NULL-terminated; if not empty,
|
||
* it should contain pairs of strings that modify the save
|
||
* parameters. For example:
|
||
* <informalexample><programlisting>
|
||
* gdk_pixbuf_save (pixbuf, handle, "jpeg", &error,
|
||
* "quality", "100", NULL);
|
||
* </programlisting></informalexample>
|
||
*
|
||
* Currently only few parameters exist. JPEG images can be saved with a
|
||
* "quality" parameter; its value should be in the range [0,100].
|
||
* Text chunks can be attached to PNG images by specifying parameters of
|
||
* the form "tEXt::key", where key is an ASCII string of length 1-79.
|
||
* The values are UTF-8 encoded strings.
|
||
* ICO images can be saved in depth 16, 24, or 32, by using the "depth"
|
||
* parameter. When the ICO saver is given "x_hot" and "y_hot" parameters,
|
||
* it produces a CUR instead of an ICO.
|
||
*
|
||
* Return value: whether an error was set
|
||
**/
|
||
|
||
gboolean
|
||
gdk_pixbuf_save (GdkPixbuf *pixbuf,
|
||
const char *filename,
|
||
const char *type,
|
||
GError **error,
|
||
...)
|
||
{
|
||
gchar **keys = NULL;
|
||
gchar **values = NULL;
|
||
va_list args;
|
||
gboolean result;
|
||
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
va_start (args, error);
|
||
|
||
collect_save_options (args, &keys, &values);
|
||
|
||
va_end (args);
|
||
|
||
result = gdk_pixbuf_savev (pixbuf, filename, type,
|
||
keys, values,
|
||
error);
|
||
|
||
g_strfreev (keys);
|
||
g_strfreev (values);
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_savev:
|
||
* @pixbuf: a #GdkPixbuf.
|
||
* @filename: name of file to save.
|
||
* @type: name of file format.
|
||
* @option_keys: name of options to set, %NULL-terminated
|
||
* @option_values: values for named options
|
||
* @error: return location for error, or %NULL
|
||
*
|
||
* Saves pixbuf to a file in @type, which is currently "jpeg", "png" or "ico".
|
||
* If @error is set, %FALSE will be returned.
|
||
* See gdk_pixbuf_save () for more details.
|
||
*
|
||
* Return value: whether an error was set
|
||
**/
|
||
|
||
gboolean
|
||
gdk_pixbuf_savev (GdkPixbuf *pixbuf,
|
||
const char *filename,
|
||
const char *type,
|
||
char **option_keys,
|
||
char **option_values,
|
||
GError **error)
|
||
{
|
||
FILE *f = NULL;
|
||
gboolean result;
|
||
|
||
|
||
g_return_val_if_fail (filename != NULL, FALSE);
|
||
g_return_val_if_fail (type != NULL, FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
f = fopen (filename, "wb");
|
||
|
||
if (f == NULL) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Failed to open '%s' for writing: %s"),
|
||
filename, g_strerror (errno));
|
||
return FALSE;
|
||
}
|
||
|
||
|
||
result = gdk_pixbuf_real_save (pixbuf, f, type,
|
||
option_keys, option_values,
|
||
error);
|
||
|
||
|
||
if (!result) {
|
||
g_return_val_if_fail (error == NULL || *error != NULL, FALSE);
|
||
fclose (f);
|
||
return FALSE;
|
||
}
|
||
|
||
if (fclose (f) < 0) {
|
||
g_set_error (error,
|
||
G_FILE_ERROR,
|
||
g_file_error_from_errno (errno),
|
||
_("Failed to close '%s' while writing image, all data may not have been saved: %s"),
|
||
filename, g_strerror (errno));
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_save_to_callback:
|
||
* @pixbuf: a #GdkPixbuf.
|
||
* @save_func: a function that is called to save each block of data that
|
||
* the save routine generates.
|
||
* @user_data: user data to pass to the save function.
|
||
* @type: name of file format.
|
||
* @error: return location for error, or %NULL
|
||
* @Varargs: list of key-value save options
|
||
*
|
||
* Saves pixbuf in format @type by feeding the produced data to a
|
||
* callback. Can be used when you want to store the image to something
|
||
* other than a file, such as an in-memory buffer or a socket.
|
||
* If @error is set, %FALSE will be returned. Possible errors
|
||
* include those in the #GDK_PIXBUF_ERROR domain and whatever the save
|
||
* function generates.
|
||
*
|
||
* See gdk_pixbuf_save() for more details.
|
||
*
|
||
* Return value: whether an error was set
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
gboolean
|
||
gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf,
|
||
GdkPixbufSaveFunc save_func,
|
||
gpointer user_data,
|
||
const char *type,
|
||
GError **error,
|
||
...)
|
||
{
|
||
gchar **keys = NULL;
|
||
gchar **values = NULL;
|
||
va_list args;
|
||
gboolean result;
|
||
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
va_start (args, error);
|
||
|
||
collect_save_options (args, &keys, &values);
|
||
|
||
va_end (args);
|
||
|
||
result = gdk_pixbuf_save_to_callbackv (pixbuf, save_func, user_data,
|
||
type, keys, values,
|
||
error);
|
||
|
||
g_strfreev (keys);
|
||
g_strfreev (values);
|
||
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_save_to_callbackv:
|
||
* @pixbuf: a #GdkPixbuf.
|
||
* @save_func: a function that is called to save each block of data that
|
||
* the save routine generates.
|
||
* @user_data: user data to pass to the save function.
|
||
* @type: name of file format.
|
||
* @option_keys: name of options to set, %NULL-terminated
|
||
* @option_values: values for named options
|
||
* @error: return location for error, or %NULL
|
||
*
|
||
* Saves pixbuf to a callback in format @type, which is currently "jpeg",
|
||
* "png" or "ico". If @error is set, %FALSE will be returned. See
|
||
* gdk_pixbuf_save_to_callback () for more details.
|
||
*
|
||
* Return value: whether an error was set
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
gboolean
|
||
gdk_pixbuf_save_to_callbackv (GdkPixbuf *pixbuf,
|
||
GdkPixbufSaveFunc save_func,
|
||
gpointer user_data,
|
||
const char *type,
|
||
char **option_keys,
|
||
char **option_values,
|
||
GError **error)
|
||
{
|
||
gboolean result;
|
||
|
||
|
||
g_return_val_if_fail (save_func != NULL, FALSE);
|
||
g_return_val_if_fail (type != NULL, FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
result = gdk_pixbuf_real_save_to_callback (pixbuf,
|
||
save_func, user_data, type,
|
||
option_keys, option_values,
|
||
error);
|
||
|
||
if (!result) {
|
||
g_return_val_if_fail (error == NULL || *error != NULL, FALSE);
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_save_to_buffer:
|
||
* @pixbuf: a #GdkPixbuf.
|
||
* @buffer: location to receive a pointer to the new buffer.
|
||
* @buffer_size: location to receive the size of the new buffer.
|
||
* @type: name of file format.
|
||
* @error: return location for error, or %NULL
|
||
* @Varargs: list of key-value save options
|
||
*
|
||
* Saves pixbuf to a new buffer in format @type, which is currently "jpeg",
|
||
* "png" or "ico". This is a convenience function that uses
|
||
* gdk_pixbuf_save_to_callback() to do the real work. Note that the buffer
|
||
* is not nul-terminated and may contain embedded nuls.
|
||
* If @error is set, %FALSE will be returned and @string will be set to
|
||
* %NULL. Possible errors include those in the #GDK_PIXBUF_ERROR
|
||
* domain.
|
||
*
|
||
* See gdk_pixbuf_save() for more details.
|
||
*
|
||
* Return value: whether an error was set
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
gboolean
|
||
gdk_pixbuf_save_to_buffer (GdkPixbuf *pixbuf,
|
||
gchar **buffer,
|
||
gsize *buffer_size,
|
||
const char *type,
|
||
GError **error,
|
||
...)
|
||
{
|
||
gchar **keys = NULL;
|
||
gchar **values = NULL;
|
||
va_list args;
|
||
gboolean result;
|
||
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
va_start (args, error);
|
||
|
||
collect_save_options (args, &keys, &values);
|
||
|
||
va_end (args);
|
||
|
||
result = gdk_pixbuf_save_to_bufferv (pixbuf, buffer, buffer_size,
|
||
type, keys, values,
|
||
error);
|
||
|
||
g_strfreev (keys);
|
||
g_strfreev (values);
|
||
|
||
return result;
|
||
}
|
||
|
||
struct SaveToBufferData {
|
||
gchar *buffer;
|
||
gsize len, max;
|
||
};
|
||
|
||
static gboolean
|
||
save_to_buffer_callback (const gchar *data,
|
||
gsize count,
|
||
GError **error,
|
||
gpointer user_data)
|
||
{
|
||
struct SaveToBufferData *sdata = user_data;
|
||
gchar *new_buffer;
|
||
gsize new_max;
|
||
|
||
if (sdata->len + count > sdata->max) {
|
||
new_max = MAX (sdata->max*2, sdata->len + count);
|
||
new_buffer = g_try_realloc (sdata->buffer, new_max);
|
||
if (!new_buffer) {
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
||
_("Insufficient memory to save image into a buffer"));
|
||
return FALSE;
|
||
}
|
||
sdata->buffer = new_buffer;
|
||
sdata->max = new_max;
|
||
}
|
||
memcpy (sdata->buffer + sdata->len, data, count);
|
||
sdata->len += count;
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_save_to_bufferv:
|
||
* @pixbuf: a #GdkPixbuf.
|
||
* @buffer: location to receive a pointer to the new buffer.
|
||
* @buffer_size: location to receive the size of the new buffer.
|
||
* @type: name of file format.
|
||
* @option_keys: name of options to set, %NULL-terminated
|
||
* @option_values: values for named options
|
||
* @error: return location for error, or %NULL
|
||
*
|
||
* Saves pixbuf to a new buffer in format @type, which is currently "jpeg",
|
||
* "png" or "ico". See gdk_pixbuf_save_to_buffer() for more details.
|
||
*
|
||
* Return value: whether an error was set
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
gboolean
|
||
gdk_pixbuf_save_to_bufferv (GdkPixbuf *pixbuf,
|
||
gchar **buffer,
|
||
gsize *buffer_size,
|
||
const char *type,
|
||
char **option_keys,
|
||
char **option_values,
|
||
GError **error)
|
||
{
|
||
static const gint initial_max = 1024;
|
||
struct SaveToBufferData sdata;
|
||
|
||
*buffer = NULL;
|
||
*buffer_size = 0;
|
||
|
||
sdata.buffer = g_try_malloc (initial_max);
|
||
sdata.max = initial_max;
|
||
sdata.len = 0;
|
||
if (!sdata.buffer) {
|
||
g_set_error (error,
|
||
GDK_PIXBUF_ERROR,
|
||
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
||
_("Insufficient memory to save image into a buffer"));
|
||
return FALSE;
|
||
}
|
||
|
||
if (!gdk_pixbuf_save_to_callbackv (pixbuf,
|
||
save_to_buffer_callback, &sdata,
|
||
type, option_keys, option_values,
|
||
error)) {
|
||
g_free (sdata.buffer);
|
||
return FALSE;
|
||
}
|
||
|
||
*buffer = sdata.buffer;
|
||
*buffer_size = sdata.len;
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_format_get_name:
|
||
* @format: a #GdkPixbufFormat
|
||
*
|
||
* Returns the name of the format.
|
||
*
|
||
* Return value: the name of the format.
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
gchar *
|
||
gdk_pixbuf_format_get_name (GdkPixbufFormat *format)
|
||
{
|
||
g_return_val_if_fail (format != NULL, NULL);
|
||
|
||
return g_strdup (format->name);
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_format_get_description:
|
||
* @format: a #GdkPixbufFormat
|
||
*
|
||
* Returns a description of the format.
|
||
*
|
||
* Return value: a description of the format.
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
gchar *
|
||
gdk_pixbuf_format_get_description (GdkPixbufFormat *format)
|
||
{
|
||
gchar *domain;
|
||
gchar *description;
|
||
g_return_val_if_fail (format != NULL, NULL);
|
||
|
||
if (format->domain != NULL)
|
||
domain = format->domain;
|
||
else
|
||
domain = GETTEXT_PACKAGE;
|
||
description = dgettext (domain, format->description);
|
||
|
||
return g_strdup (description);
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_format_get_mime_types:
|
||
* @format: a #GdkPixbufFormat
|
||
*
|
||
* Returns the mime types supported by the format.
|
||
*
|
||
* Return value: a %NULL-terminated array of mime types which must be freed with
|
||
* g_strfreev() when it is no longer needed.
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
gchar **
|
||
gdk_pixbuf_format_get_mime_types (GdkPixbufFormat *format)
|
||
{
|
||
g_return_val_if_fail (format != NULL, NULL);
|
||
|
||
return g_strdupv (format->mime_types);
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_format_get_extensions:
|
||
* @format: a #GdkPixbufFormat
|
||
*
|
||
* Returns the filename extensions typically used for files in the
|
||
* given format.
|
||
*
|
||
* Return value: a %NULL-terminated array of filename extensions which must be
|
||
* freed with g_strfreev() when it is no longer needed.
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
gchar **
|
||
gdk_pixbuf_format_get_extensions (GdkPixbufFormat *format)
|
||
{
|
||
g_return_val_if_fail (format != NULL, NULL);
|
||
|
||
return g_strdupv (format->extensions);
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_format_is_writable:
|
||
* @format: a #GdkPixbufFormat
|
||
*
|
||
* Returns whether pixbufs can be saved in the given format.
|
||
*
|
||
* Return value: whether pixbufs can be saved in the given format.
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
gboolean
|
||
gdk_pixbuf_format_is_writable (GdkPixbufFormat *format)
|
||
{
|
||
g_return_val_if_fail (format != NULL, FALSE);
|
||
|
||
return (format->flags & GDK_PIXBUF_FORMAT_WRITABLE) != 0;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_format_is_scalable:
|
||
* @format: a #GdkPixbufFormat
|
||
*
|
||
* Returns whether this image format is scalable. If a file is in a
|
||
* scalable format, it is preferable to load it at the desired size,
|
||
* rather than loading it at the default size and scaling the
|
||
* resulting pixbuf to the desired size.
|
||
*
|
||
* Return value: whether this image format is scalable.
|
||
*
|
||
* Since: 2.6
|
||
*/
|
||
gboolean
|
||
gdk_pixbuf_format_is_scalable (GdkPixbufFormat *format)
|
||
{
|
||
g_return_val_if_fail (format != NULL, FALSE);
|
||
|
||
return (format->flags & GDK_PIXBUF_FORMAT_SCALABLE) != 0;
|
||
}
|
||
|
||
GdkPixbufFormat *
|
||
_gdk_pixbuf_get_format (GdkPixbufModule *module)
|
||
{
|
||
g_return_val_if_fail (module != NULL, NULL);
|
||
|
||
return module->info;
|
||
}
|
||
|
||
/**
|
||
* gdk_pixbuf_get_formats:
|
||
*
|
||
* Obtains the available information about the image formats supported
|
||
* by GdkPixbuf.
|
||
*
|
||
* Returns: A list of #GdkPixbufFormat<!-- -->s describing the supported
|
||
* image formats. The list should be freed when it is no longer needed,
|
||
* but the structures themselves are owned by #GdkPixbuf and should not be
|
||
* freed.
|
||
*
|
||
* Since: 2.2
|
||
*/
|
||
GSList *
|
||
gdk_pixbuf_get_formats (void)
|
||
{
|
||
GSList *result = NULL;
|
||
GSList *modules;
|
||
|
||
for (modules = get_file_formats (); modules; modules = g_slist_next (modules)) {
|
||
GdkPixbufModule *module = (GdkPixbufModule *)modules->data;
|
||
GdkPixbufFormat *info = _gdk_pixbuf_get_format (module);
|
||
result = g_slist_prepend (result, info);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
|
||
|
||
|