/usr/include/gdk-pixbuf-2.0/gdk-pixbuf/gdk-pixbuf-core.h is in libgdk-pixbuf2.0-dev 2.30.7-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 | /* GdkPixbuf library - GdkPixbuf data structure
*
* Copyright (C) 2003 The Free Software Foundation
*
* Authors: Mark Crichton <crichton@gimp.org>
* Miguel de Icaza <miguel@gnu.org>
* Federico Mena-Quintero <federico@gimp.org>
* Havoc Pennington <hp@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GDK_PIXBUF_CORE_H
#define GDK_PIXBUF_CORE_H
#if defined(GDK_PIXBUF_DISABLE_SINGLE_INCLUDES) && !defined (GDK_PIXBUF_H_INSIDE) && !defined (GDK_PIXBUF_COMPILATION)
#error "Only <gdk-pixbuf/gdk-pixbuf.h> can be included directly."
#endif
#include <glib.h>
#include <glib-object.h>
#include <gio/gio.h>
G_BEGIN_DECLS
/**
* SECTION:gdk-pixbuf
* @Short_description: Information that describes an image.
* @Title: The GdkPixbuf Structure
*
* The #GdkPixbuf structure contains
* information that describes an image in memory.
*
* ## Image Data ## {#image-data}
*
* Image data in a pixbuf is stored in memory in uncompressed,
* packed format. Rows in the image are stored top to bottom, and
* in each row pixels are stored from left to right. There may be
* padding at the end of a row. The "rowstride" value of a pixbuf,
* as returned by gdk_pixbuf_get_rowstride(), indicates the number
* of bytes between rows.
*
* ## put_pixel() Example ## {#put-pixel}
*
* The following code illustrates a simple put_pixel()
* function for RGB pixbufs with 8 bits per channel with an alpha
* channel. It is not included in the gdk-pixbuf library for
* performance reasons; rather than making several function calls
* for each pixel, your own code can take shortcuts.
*
* |[<!-- language="C" -->
* static void
* put_pixel (GdkPixbuf *pixbuf, int x, int y, guchar red, guchar green, guchar blue, guchar alpha)
* {
* int width, height, rowstride, n_channels;
* guchar *pixels, *p;
*
* n_channels = gdk_pixbuf_get_n_channels (pixbuf);
*
* g_assert (gdk_pixbuf_get_colorspace (pixbuf) == GDK_COLORSPACE_RGB);
* g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
* g_assert (gdk_pixbuf_get_has_alpha (pixbuf));
* g_assert (n_channels == 4);
*
* width = gdk_pixbuf_get_width (pixbuf);
* height = gdk_pixbuf_get_height (pixbuf);
*
* g_assert (x >= 0 && x < width);
* g_assert (y >= 0 && y < height);
*
* rowstride = gdk_pixbuf_get_rowstride (pixbuf);
* pixels = gdk_pixbuf_get_pixels (pixbuf);
*
* p = pixels + y * rowstride + x * n_channels;
* p[0] = red;
* p[1] = green;
* p[2] = blue;
* p[3] = alpha;
* }
* ]|
*
* This function will not work for pixbufs with images that are
* other than 8 bits per sample or channel, but it will work for
* most of the pixbufs that GTK+ uses.
*
* If you are doing memcpy() of raw pixbuf data, note that the last row
* in the pixbuf may not be as wide as the full rowstride, but rather
* just as wide as the pixel data needs to be. That is, it is unsafe to
* do `memcpy (dest, pixels, rowstride * height)` to copy a whole pixbuf.
* Use gdk_pixbuf_copy() instead, or compute the width in bytes of the
* last row as `width * ((n_channels * bits_per_sample + 7) / 8)`.
*/
/**
* GdkPixbufAlphaMode:
* @GDK_PIXBUF_ALPHA_BILEVEL: A bilevel clipping mask (black and white)
* will be created and used to draw the image. Pixels below 0.5 opacity
* will be considered fully transparent, and all others will be
* considered fully opaque.
* @GDK_PIXBUF_ALPHA_FULL: For now falls back to #GDK_PIXBUF_ALPHA_BILEVEL.
* In the future it will do full alpha compositing.
*
* These values can be passed to
* gdk_pixbuf_render_to_drawable_alpha() to control how the alpha
* channel of an image should be handled. This function can create a
* bilevel clipping mask (black and white) and use it while painting
* the image. In the future, when the X Window System gets an alpha
* channel extension, it will be possible to do full alpha
* compositing onto arbitrary drawables. For now both cases fall
* back to a bilevel clipping mask.
*/
typedef enum
{
GDK_PIXBUF_ALPHA_BILEVEL,
GDK_PIXBUF_ALPHA_FULL
} GdkPixbufAlphaMode;
/**
* GdkColorspace:
* @GDK_COLORSPACE_RGB: Indicates a red/green/blue additive color space.
*
* This enumeration defines the color spaces that are supported by
* the gdk-pixbuf library. Currently only RGB is supported.
*/
/* Note that these values are encoded in inline pixbufs
* as ints, so don't reorder them
*/
typedef enum {
GDK_COLORSPACE_RGB
} GdkColorspace;
/* All of these are opaque structures */
/**
* GdkPixbuf:
*
* This is the main structure in the gdk-pixbuf library. It is
* used to represent images. It contains information about the
* image's pixel data, its color space, bits per sample, width and
* height, and the rowstride (the number of bytes between the start of
* one row and the start of the next).
*/
typedef struct _GdkPixbuf GdkPixbuf;
#define GDK_TYPE_PIXBUF (gdk_pixbuf_get_type ())
#define GDK_PIXBUF(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_PIXBUF, GdkPixbuf))
#define GDK_IS_PIXBUF(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_PIXBUF))
/**
* GdkPixbufDestroyNotify:
* @pixels: (array) (element-type guint8): The pixel array of the pixbuf
* that is being finalized.
* @data: (closure): User closure data.
*
* A function of this type is responsible for freeing the pixel array
* of a pixbuf. The gdk_pixbuf_new_from_data() function lets you
* pass in a pre-allocated pixel array so that a pixbuf can be
* created from it; in this case you will need to pass in a function
* of #GdkPixbufDestroyNotify so that the pixel data can be freed
* when the pixbuf is finalized.
*/
typedef void (* GdkPixbufDestroyNotify) (guchar *pixels, gpointer data);
/**
* GDK_PIXBUF_ERROR:
*
* Error domain used for pixbuf operations. Indicates that the error code
* will be in the #GdkPixbufError enumeration. See #GError for
* information on error domains and error codes.
*/
#define GDK_PIXBUF_ERROR gdk_pixbuf_error_quark ()
/**
* GdkPixbufError:
* @GDK_PIXBUF_ERROR_CORRUPT_IMAGE: An image file was broken somehow.
* @GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY: Not enough memory.
* @GDK_PIXBUF_ERROR_BAD_OPTION: A bad option was passed to a pixbuf save module.
* @GDK_PIXBUF_ERROR_UNKNOWN_TYPE: Unknown image type.
* @GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION: Don't know how to perform the
* given operation on the type of image at hand.
* @GDK_PIXBUF_ERROR_FAILED: Generic failure code, something went wrong.
*
* An error code in the #GDK_PIXBUF_ERROR domain. Many gdk-pixbuf
* operations can cause errors in this domain, or in the #G_FILE_ERROR
* domain.
*/
typedef enum {
/* image data hosed */
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
/* no mem to load image */
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
/* bad option passed to save routine */
GDK_PIXBUF_ERROR_BAD_OPTION,
/* unsupported image type (sort of an ENOSYS) */
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
/* unsupported operation (load, save) for image type */
GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
GDK_PIXBUF_ERROR_FAILED
} GdkPixbufError;
GQuark gdk_pixbuf_error_quark (void);
GType gdk_pixbuf_get_type (void) G_GNUC_CONST;
/* Reference counting */
#ifndef GDK_PIXBUF_DISABLE_DEPRECATED
G_DEPRECATED_FOR(g_object_ref)
GdkPixbuf *gdk_pixbuf_ref (GdkPixbuf *pixbuf);
G_DEPRECATED_FOR(g_object_unref)
void gdk_pixbuf_unref (GdkPixbuf *pixbuf);
#endif
/* GdkPixbuf accessors */
GdkColorspace gdk_pixbuf_get_colorspace (const GdkPixbuf *pixbuf);
int gdk_pixbuf_get_n_channels (const GdkPixbuf *pixbuf);
gboolean gdk_pixbuf_get_has_alpha (const GdkPixbuf *pixbuf);
int gdk_pixbuf_get_bits_per_sample (const GdkPixbuf *pixbuf);
guchar *gdk_pixbuf_get_pixels (const GdkPixbuf *pixbuf);
int gdk_pixbuf_get_width (const GdkPixbuf *pixbuf);
int gdk_pixbuf_get_height (const GdkPixbuf *pixbuf);
int gdk_pixbuf_get_rowstride (const GdkPixbuf *pixbuf);
gsize gdk_pixbuf_get_byte_length (const GdkPixbuf *pixbuf);
guchar *gdk_pixbuf_get_pixels_with_length (const GdkPixbuf *pixbuf,
guint *length);
/* Create a blank pixbuf with an optimal rowstride and a new buffer */
GdkPixbuf *gdk_pixbuf_new (GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample,
int width, int height);
/* Copy a pixbuf */
GdkPixbuf *gdk_pixbuf_copy (const GdkPixbuf *pixbuf);
/* Create a pixbuf which points to the pixels of another pixbuf */
GdkPixbuf *gdk_pixbuf_new_subpixbuf (GdkPixbuf *src_pixbuf,
int src_x,
int src_y,
int width,
int height);
/* Simple loading */
#ifndef __GTK_DOC_IGNORE__
#ifdef G_OS_WIN32
/* DLL ABI stability hack. */
#define gdk_pixbuf_new_from_file gdk_pixbuf_new_from_file_utf8
#define gdk_pixbuf_new_from_file_at_size gdk_pixbuf_new_from_file_at_size_utf8
#define gdk_pixbuf_new_from_file_at_scale gdk_pixbuf_new_from_file_at_scale_utf8
#endif
#endif
GdkPixbuf *gdk_pixbuf_new_from_file (const char *filename,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_file_at_size (const char *filename,
int width,
int height,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_file_at_scale (const char *filename,
int width,
int height,
gboolean preserve_aspect_ratio,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_resource (const char *resource_path,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_resource_at_scale (const char *resource_path,
int width,
int height,
gboolean preserve_aspect_ratio,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_data (const guchar *data,
GdkColorspace colorspace,
gboolean has_alpha,
int bits_per_sample,
int width, int height,
int rowstride,
GdkPixbufDestroyNotify destroy_fn,
gpointer destroy_fn_data);
GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const char **data);
GdkPixbuf* gdk_pixbuf_new_from_inline (gint data_length,
const guint8 *data,
gboolean copy_pixels,
GError **error);
/* Mutations */
void gdk_pixbuf_fill (GdkPixbuf *pixbuf,
guint32 pixel);
/* Saving */
#ifndef __GTK_DOC_IGNORE__
#ifdef G_OS_WIN32
/* DLL ABI stability hack. */
#define gdk_pixbuf_save gdk_pixbuf_save_utf8
#define gdk_pixbuf_savev gdk_pixbuf_savev_utf8
#endif
#endif
gboolean gdk_pixbuf_save (GdkPixbuf *pixbuf,
const char *filename,
const char *type,
GError **error,
...) G_GNUC_NULL_TERMINATED;
gboolean gdk_pixbuf_savev (GdkPixbuf *pixbuf,
const char *filename,
const char *type,
char **option_keys,
char **option_values,
GError **error);
/* Saving to a callback function */
/**
* GdkPixbufSaveFunc:
* @buf: (array length=count) (element-type guint8): bytes to be written.
* @count: number of bytes in @buf.
* @error: (out): A location to return an error.
* @data: (closure): user data passed to gdk_pixbuf_save_to_callback().
*
* Specifies the type of the function passed to
* gdk_pixbuf_save_to_callback(). It is called once for each block of
* bytes that is "written" by gdk_pixbuf_save_to_callback(). If
* successful it should return %TRUE. If an error occurs it should set
* @error and return %FALSE, in which case gdk_pixbuf_save_to_callback()
* will fail with the same error.
*
* Since: 2.4
* Returns: %TRUE if successful, %FALSE (with @error set) if failed.
*/
typedef gboolean (*GdkPixbufSaveFunc) (const gchar *buf,
gsize count,
GError **error,
gpointer data);
gboolean gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf,
GdkPixbufSaveFunc save_func,
gpointer user_data,
const char *type,
GError **error,
...) G_GNUC_NULL_TERMINATED;
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);
/* Saving into a newly allocated char array */
gboolean gdk_pixbuf_save_to_buffer (GdkPixbuf *pixbuf,
gchar **buffer,
gsize *buffer_size,
const char *type,
GError **error,
...) G_GNUC_NULL_TERMINATED;
gboolean gdk_pixbuf_save_to_bufferv (GdkPixbuf *pixbuf,
gchar **buffer,
gsize *buffer_size,
const char *type,
char **option_keys,
char **option_values,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_stream (GInputStream *stream,
GCancellable *cancellable,
GError **error);
void gdk_pixbuf_new_from_stream_async (GInputStream *stream,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GdkPixbuf *gdk_pixbuf_new_from_stream_finish (GAsyncResult *async_result,
GError **error);
GdkPixbuf *gdk_pixbuf_new_from_stream_at_scale (GInputStream *stream,
gint width,
gint height,
gboolean preserve_aspect_ratio,
GCancellable *cancellable,
GError **error);
void gdk_pixbuf_new_from_stream_at_scale_async (GInputStream *stream,
gint width,
gint height,
gboolean preserve_aspect_ratio,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
gboolean gdk_pixbuf_save_to_stream (GdkPixbuf *pixbuf,
GOutputStream *stream,
const char *type,
GCancellable *cancellable,
GError **error,
...);
void gdk_pixbuf_save_to_stream_async (GdkPixbuf *pixbuf,
GOutputStream *stream,
const gchar *type,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data,
...);
gboolean gdk_pixbuf_save_to_stream_finish (GAsyncResult *async_result,
GError **error);
/* Adding an alpha channel */
GdkPixbuf *gdk_pixbuf_add_alpha (const GdkPixbuf *pixbuf, gboolean substitute_color,
guchar r, guchar g, guchar b);
/* Copy an area of a pixbuf onto another one */
void gdk_pixbuf_copy_area (const GdkPixbuf *src_pixbuf,
int src_x, int src_y,
int width, int height,
GdkPixbuf *dest_pixbuf,
int dest_x, int dest_y);
/* Brighten/darken and optionally make it pixelated-looking */
void gdk_pixbuf_saturate_and_pixelate (const GdkPixbuf *src,
GdkPixbuf *dest,
gfloat saturation,
gboolean pixelate);
/* Transform an image to agree with its embedded orientation option / tag */
GdkPixbuf *gdk_pixbuf_apply_embedded_orientation (GdkPixbuf *src);
const gchar * gdk_pixbuf_get_option (GdkPixbuf *pixbuf,
const gchar *key);
G_END_DECLS
#endif /* GDK_PIXBUF_CORE_H */
|