gdk-pixbuf-io.h 5.69 KB
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/* GdkPixbuf library - Io handling.  This is an internal header for 
 * GdkPixbuf. You should never use it unless you are doing development for 
 * GdkPixbuf itself.
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 *
 * Copyright (C) 1999 The Free Software Foundation
 *
 * Authors: Mark Crichton <crichton@gimp.org>
 *          Miguel de Icaza <miguel@gnu.org>
 *          Federico Mena-Quintero <federico@gimp.org>
 *          Jonathan Blandford <jrb@redhat.com>
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 *          Michael Fulbright <drmike@redhat.com>
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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
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
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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
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
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#if !defined (GDK_PIXBUF_H_INSIDE) && !defined (GDK_PIXBUF_COMPILATION)
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#error "Only <gdk-pixbuf/gdk-pixbuf.h> can be included directly."
#endif

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#ifndef GDK_PIXBUF_IO_H
#define GDK_PIXBUF_IO_H

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#include <stdio.h>
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#include <glib.h>
#include <gmodule.h>
#include <gdk-pixbuf/gdk-pixbuf-core.h>
#include <gdk-pixbuf/gdk-pixbuf-animation.h>
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G_BEGIN_DECLS
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typedef struct _GdkPixbufFormat GdkPixbufFormat;
 
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GSList    *gdk_pixbuf_get_formats            (void);
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gchar     *gdk_pixbuf_format_get_name        (GdkPixbufFormat *format);
gchar     *gdk_pixbuf_format_get_description (GdkPixbufFormat *format);
gchar    **gdk_pixbuf_format_get_mime_types  (GdkPixbufFormat *format);
gchar    **gdk_pixbuf_format_get_extensions  (GdkPixbufFormat *format);
gboolean   gdk_pixbuf_format_is_writable     (GdkPixbufFormat *format);
gboolean   gdk_pixbuf_format_is_scalable     (GdkPixbufFormat *format);
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gboolean   gdk_pixbuf_format_is_disabled     (GdkPixbufFormat *format);
void       gdk_pixbuf_format_set_disabled    (GdkPixbufFormat *format,
					      gboolean         disabled);
gchar     *gdk_pixbuf_format_get_license     (GdkPixbufFormat *format);
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GdkPixbufFormat *gdk_pixbuf_get_file_info    (const gchar     *filename,
					      gint            *width, 
					      gint            *height);
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#ifdef GDK_PIXBUF_ENABLE_BACKEND
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typedef void (* GdkPixbufModuleSizeFunc)           (gint *width, 
						    gint *height, 
						    gpointer user_data);

typedef void (* GdkPixbufModulePreparedFunc) (GdkPixbuf          *pixbuf,
					      GdkPixbufAnimation *anim,
					      gpointer            user_data);
typedef void (* GdkPixbufModuleUpdatedFunc)  (GdkPixbuf *pixbuf,
					      int        x,
					      int        y,
					      int        width,
					      int        height,
					      gpointer   user_data);

typedef struct _GdkPixbufModulePattern GdkPixbufModulePattern;
struct _GdkPixbufModulePattern {
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	char *prefix;
	char *mask;
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	int relevance;
};
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typedef struct _GdkPixbufModule GdkPixbufModule;
struct _GdkPixbufModule {
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	char *module_name;
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	char *module_path;
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	GModule *module;
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	GdkPixbufFormat *info;
	
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        GdkPixbuf *(* load) (FILE    *f,
                             GError **error);
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        GdkPixbuf *(* load_xpm_data) (const char **data);
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        /* Incremental loading */
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        gpointer (* begin_load)     (GdkPixbufModuleSizeFunc size_func,
                                     GdkPixbufModulePreparedFunc prepare_func,
                                     GdkPixbufModuleUpdatedFunc update_func,
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                                     gpointer user_data,
                                     GError **error);
        gboolean (* stop_load)      (gpointer context,
                                     GError **error);
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        gboolean (* load_increment) (gpointer      context,
                                     const guchar *buf,
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                                     guint         size,
                                     GError      **error);
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	/* Animation loading */
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	GdkPixbufAnimation *(* load_animation) (FILE    *f,
                                                GError **error);
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        /* Saving */
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        gboolean (* save) (FILE      *f,
                           GdkPixbuf *pixbuf,
                           gchar    **param_keys,
                           gchar    **param_values,
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                           GError   **error);
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        gboolean (*save_to_callback) (GdkPixbufSaveFunc save_func,
				      gpointer user_data,
				      GdkPixbuf *pixbuf,
				      gchar **option_keys,
				      gchar **option_values,
				      GError **error);
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  /*< private >*/
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	void (*_reserved1) (void); 
	void (*_reserved2) (void); 
	void (*_reserved3) (void); 
	void (*_reserved4) (void); 
	void (*_reserved5) (void); 
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};
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typedef void (* GdkPixbufModuleFillVtableFunc) (GdkPixbufModule *module);
typedef void (* GdkPixbufModuleFillInfoFunc) (GdkPixbufFormat *info);

/*  key/value pairs that can be attached by the pixbuf loader  */

gboolean gdk_pixbuf_set_option  (GdkPixbuf   *pixbuf,
                                 const gchar *key,
                                 const gchar *value);

typedef enum /*< skip >*/
{
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  GDK_PIXBUF_FORMAT_WRITABLE = 1 << 0,
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  GDK_PIXBUF_FORMAT_SCALABLE = 1 << 1,
  GDK_PIXBUF_FORMAT_THREADSAFE = 1 << 2
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} GdkPixbufFormatFlags;

struct _GdkPixbufFormat {
  gchar *name;
  GdkPixbufModulePattern *signature;
  gchar *domain;
  gchar *description;
  gchar **mime_types;
  gchar **extensions;
  guint32 flags;
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  gboolean disabled;
  gchar *license;
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};
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#endif /* GDK_PIXBUF_ENABLE_BACKEND */
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G_END_DECLS
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#endif /* GDK_PIXBUF_IO_H */