1 /* GdkPixbuf library - GdkPixbuf data structure
3 * Copyright (C) 2003 The Free Software Foundation
5 * Authors: Mark Crichton <crichton@gimp.org>
6 * Miguel de Icaza <miguel@gnu.org>
7 * Federico Mena-Quintero <federico@gimp.org>
8 * Havoc Pennington <hp@redhat.com>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 02111-1307, USA.
26 #if defined(GDK_PIXBUF_DISABLE_SINGLE_INCLUDES) && !defined (GDK_PIXBUF_H_INSIDE) && !defined (GDK_PIXBUF_COMPILATION)
27 #error "Only <gdk-pixbuf/gdk-pixbuf.h> can be included directly."
30 #ifndef GDK_PIXBUF_CORE_H
31 #define GDK_PIXBUF_CORE_H
34 #include <glib-object.h>
39 /* Alpha compositing mode */
42 GDK_PIXBUF_ALPHA_BILEVEL,
46 /* Color spaces; right now only RGB is supported.
47 * Note that these values are encoded in inline pixbufs
48 * as ints, so don't reorder them
54 /* All of these are opaque structures */
55 typedef struct _GdkPixbuf GdkPixbuf;
57 #define GDK_TYPE_PIXBUF (gdk_pixbuf_get_type ())
58 #define GDK_PIXBUF(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_PIXBUF, GdkPixbuf))
59 #define GDK_IS_PIXBUF(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_PIXBUF))
62 /* Handler that must free the pixel array */
63 typedef void (* GdkPixbufDestroyNotify) (guchar *pixels, gpointer data);
65 #define GDK_PIXBUF_ERROR gdk_pixbuf_error_quark ()
68 /* image data hosed */
69 GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
70 /* no mem to load image */
71 GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
72 /* bad option passed to save routine */
73 GDK_PIXBUF_ERROR_BAD_OPTION,
74 /* unsupported image type (sort of an ENOSYS) */
75 GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
76 /* unsupported operation (load, save) for image type */
77 GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
78 GDK_PIXBUF_ERROR_FAILED
81 GQuark gdk_pixbuf_error_quark (void);
85 GType gdk_pixbuf_get_type (void) G_GNUC_CONST;
87 /* Reference counting */
89 #ifndef GDK_PIXBUF_DISABLE_DEPRECATED
90 GdkPixbuf *gdk_pixbuf_ref (GdkPixbuf *pixbuf);
91 void gdk_pixbuf_unref (GdkPixbuf *pixbuf);
94 /* GdkPixbuf accessors */
96 GdkColorspace gdk_pixbuf_get_colorspace (const GdkPixbuf *pixbuf);
97 int gdk_pixbuf_get_n_channels (const GdkPixbuf *pixbuf);
98 gboolean gdk_pixbuf_get_has_alpha (const GdkPixbuf *pixbuf);
99 int gdk_pixbuf_get_bits_per_sample (const GdkPixbuf *pixbuf);
100 guchar *gdk_pixbuf_get_pixels (const GdkPixbuf *pixbuf);
101 int gdk_pixbuf_get_width (const GdkPixbuf *pixbuf);
102 int gdk_pixbuf_get_height (const GdkPixbuf *pixbuf);
103 int gdk_pixbuf_get_rowstride (const GdkPixbuf *pixbuf);
107 /* Create a blank pixbuf with an optimal rowstride and a new buffer */
108 GdkPixbuf *gdk_pixbuf_new (GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample,
109 int width, int height);
113 GdkPixbuf *gdk_pixbuf_copy (const GdkPixbuf *pixbuf);
115 /* Create a pixbuf which points to the pixels of another pixbuf */
116 GdkPixbuf *gdk_pixbuf_new_subpixbuf (GdkPixbuf *src_pixbuf,
125 /* DLL ABI stability hack. */
126 #define gdk_pixbuf_new_from_file gdk_pixbuf_new_from_file_utf8
127 #define gdk_pixbuf_new_from_file_at_size gdk_pixbuf_new_from_file_at_size_utf8
128 #define gdk_pixbuf_new_from_file_at_scale gdk_pixbuf_new_from_file_at_scale_utf8
131 GdkPixbuf *gdk_pixbuf_new_from_file (const char *filename,
133 GdkPixbuf *gdk_pixbuf_new_from_file_at_size (const char *filename,
137 GdkPixbuf *gdk_pixbuf_new_from_file_at_scale (const char *filename,
140 gboolean preserve_aspect_ratio,
143 GdkPixbuf *gdk_pixbuf_new_from_data (const guchar *data,
144 GdkColorspace colorspace,
147 int width, int height,
149 GdkPixbufDestroyNotify destroy_fn,
150 gpointer destroy_fn_data);
152 GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const char **data);
153 GdkPixbuf* gdk_pixbuf_new_from_inline (gint data_length,
155 gboolean copy_pixels,
159 void gdk_pixbuf_fill (GdkPixbuf *pixbuf,
165 /* DLL ABI stability hack. */
166 #define gdk_pixbuf_save gdk_pixbuf_save_utf8
167 #define gdk_pixbuf_savev gdk_pixbuf_savev_utf8
170 gboolean gdk_pixbuf_save (GdkPixbuf *pixbuf,
171 const char *filename,
174 ...) G_GNUC_NULL_TERMINATED;
176 gboolean gdk_pixbuf_savev (GdkPixbuf *pixbuf,
177 const char *filename,
180 char **option_values,
183 /* Saving to a callback function */
185 typedef gboolean (*GdkPixbufSaveFunc) (const gchar *buf,
190 gboolean gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf,
191 GdkPixbufSaveFunc save_func,
195 ...) G_GNUC_NULL_TERMINATED;
197 gboolean gdk_pixbuf_save_to_callbackv (GdkPixbuf *pixbuf,
198 GdkPixbufSaveFunc save_func,
202 char **option_values,
205 /* Saving into a newly allocated char array */
207 gboolean gdk_pixbuf_save_to_buffer (GdkPixbuf *pixbuf,
212 ...) G_GNUC_NULL_TERMINATED;
214 gboolean gdk_pixbuf_save_to_bufferv (GdkPixbuf *pixbuf,
219 char **option_values,
222 GdkPixbuf *gdk_pixbuf_new_from_stream (GInputStream *stream,
223 GCancellable *cancellable,
226 GdkPixbuf *gdk_pixbuf_new_from_stream_at_scale (GInputStream *stream,
229 gboolean preserve_aspect_ratio,
230 GCancellable *cancellable,
233 gboolean gdk_pixbuf_save_to_stream (GdkPixbuf *pixbuf,
234 GOutputStream *stream,
236 GCancellable *cancellable,
240 /* Adding an alpha channel */
241 GdkPixbuf *gdk_pixbuf_add_alpha (const GdkPixbuf *pixbuf, gboolean substitute_color,
242 guchar r, guchar g, guchar b);
244 /* Copy an area of a pixbuf onto another one */
245 void gdk_pixbuf_copy_area (const GdkPixbuf *src_pixbuf,
246 int src_x, int src_y,
247 int width, int height,
248 GdkPixbuf *dest_pixbuf,
249 int dest_x, int dest_y);
251 /* Brighten/darken and optionally make it pixelated-looking */
252 void gdk_pixbuf_saturate_and_pixelate (const GdkPixbuf *src,
257 /* Transform an image to agree with its embedded orientation option / tag */
258 GdkPixbuf *gdk_pixbuf_apply_embedded_orientation (GdkPixbuf *src);
260 G_CONST_RETURN gchar * gdk_pixbuf_get_option (GdkPixbuf *pixbuf,
267 #endif /* GDK_PIXBUF_CORE_H */