/* GdkPixbuf library - GdkPixbuf data structure * * Copyright (C) 2003 The Free Software Foundation * * Authors: Mark Crichton * Miguel de Icaza * Federico Mena-Quintero * Havoc Pennington * * 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 . */ #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 can be included directly." #endif #include #include #include #include G_BEGIN_DECLS /** * 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. * * Control the alpha channel for drawables. * * These values can be passed to gdk_pixbuf_xlib_render_to_drawable_alpha() * in gdk-pixbuf-xlib 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. * * Deprecated: 2.42: There is no user of GdkPixbufAlphaMode in GdkPixbuf, * and the Xlib utility functions have been split out to their own * library, gdk-pixbuf-xlib */ 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 */ 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 type `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 the `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. * @GDK_PIXBUF_ERROR_INCOMPLETE_ANIMATION: Only part of the animation was loaded. * * 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, GDK_PIXBUF_ERROR_INCOMPLETE_ANIMATION } GdkPixbufError; GDK_PIXBUF_AVAILABLE_IN_ALL GQuark gdk_pixbuf_error_quark (void); GDK_PIXBUF_AVAILABLE_IN_ALL GType gdk_pixbuf_get_type (void) G_GNUC_CONST; /* Reference counting */ #ifndef GDK_PIXBUF_DISABLE_DEPRECATED GDK_PIXBUF_DEPRECATED_IN_2_0_FOR(g_object_ref) GdkPixbuf *gdk_pixbuf_ref (GdkPixbuf *pixbuf); GDK_PIXBUF_DEPRECATED_IN_2_0_FOR(g_object_unref) void gdk_pixbuf_unref (GdkPixbuf *pixbuf); #endif /* GdkPixbuf accessors */ GDK_PIXBUF_AVAILABLE_IN_ALL GdkColorspace gdk_pixbuf_get_colorspace (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL int gdk_pixbuf_get_n_channels (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL gboolean gdk_pixbuf_get_has_alpha (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL int gdk_pixbuf_get_bits_per_sample (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL guchar *gdk_pixbuf_get_pixels (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL int gdk_pixbuf_get_width (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL int gdk_pixbuf_get_height (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_ALL int gdk_pixbuf_get_rowstride (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_2_26 gsize gdk_pixbuf_get_byte_length (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_2_26 guchar *gdk_pixbuf_get_pixels_with_length (const GdkPixbuf *pixbuf, guint *length); GDK_PIXBUF_AVAILABLE_IN_2_32 const guint8* gdk_pixbuf_read_pixels (const GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_2_32 GBytes * gdk_pixbuf_read_pixel_bytes (const GdkPixbuf *pixbuf); /* Create a blank pixbuf with an optimal rowstride and a new buffer */ GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_new (GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample, int width, int height); GDK_PIXBUF_AVAILABLE_IN_2_36 gint gdk_pixbuf_calculate_rowstride (GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample, int width, int height); /* Copy a pixbuf */ GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_copy (const GdkPixbuf *pixbuf); /* Create a pixbuf which points to the pixels of another pixbuf */ GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_new_subpixbuf (GdkPixbuf *src_pixbuf, int src_x, int src_y, int width, int height); /* Simple loading */ #ifdef G_OS_WIN32 /* In previous versions these _utf8 variants where exported and linked to * by default. Export them here for ABI (and gi API) compat. */ GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_new_from_file_utf8 (const char *filename, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_4 GdkPixbuf *gdk_pixbuf_new_from_file_at_size_utf8 (const char *filename, int width, int height, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_6 GdkPixbuf *gdk_pixbuf_new_from_file_at_scale_utf8 (const char *filename, int width, int height, gboolean preserve_aspect_ratio, GError **error); #endif GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_new_from_file (const char *filename, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_4 GdkPixbuf *gdk_pixbuf_new_from_file_at_size (const char *filename, int width, int height, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_6 GdkPixbuf *gdk_pixbuf_new_from_file_at_scale (const char *filename, int width, int height, gboolean preserve_aspect_ratio, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_26 GdkPixbuf *gdk_pixbuf_new_from_resource (const char *resource_path, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_26 GdkPixbuf *gdk_pixbuf_new_from_resource_at_scale (const char *resource_path, int width, int height, gboolean preserve_aspect_ratio, GError **error); GDK_PIXBUF_AVAILABLE_IN_ALL 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); GDK_PIXBUF_AVAILABLE_IN_2_32 GdkPixbuf *gdk_pixbuf_new_from_bytes (GBytes *data, GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample, int width, int height, int rowstride); GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const char **data); #ifndef GDK_PIXBUF_DISABLE_DEPRECATED GDK_PIXBUF_DEPRECATED_IN_2_32 GdkPixbuf* gdk_pixbuf_new_from_inline (gint data_length, const guint8 *data, gboolean copy_pixels, GError **error); #endif /* Mutations */ GDK_PIXBUF_AVAILABLE_IN_ALL 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 #endif #endif GDK_PIXBUF_AVAILABLE_IN_ALL gboolean gdk_pixbuf_save (GdkPixbuf *pixbuf, const char *filename, const char *type, GError **error, ...) G_GNUC_NULL_TERMINATED; GDK_PIXBUF_AVAILABLE_IN_ALL gboolean gdk_pixbuf_savev (GdkPixbuf *pixbuf, const char *filename, const char *type, char **option_keys, char **option_values, GError **error); #ifdef G_OS_WIN32 GDK_PIXBUF_AVAILABLE_IN_ALL gboolean gdk_pixbuf_savev_utf8 (GdkPixbuf *pixbuf, const char *filename, const char *type, char **option_keys, char **option_values, GError **error); #endif /* 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(). * * Save functions used by [method@GdkPixbuf.Pixbuf.save_to_callback]. * * This function 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. * * Returns: `TRUE` if successful, `FALSE` otherwise * * Since: 2.4 */ typedef gboolean (*GdkPixbufSaveFunc) (const gchar *buf, gsize count, GError **error, gpointer data); GDK_PIXBUF_AVAILABLE_IN_2_4 gboolean gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf, GdkPixbufSaveFunc save_func, gpointer user_data, const char *type, GError **error, ...) G_GNUC_NULL_TERMINATED; GDK_PIXBUF_AVAILABLE_IN_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); /* Saving into a newly allocated char array */ GDK_PIXBUF_AVAILABLE_IN_2_4 gboolean gdk_pixbuf_save_to_buffer (GdkPixbuf *pixbuf, gchar **buffer, gsize *buffer_size, const char *type, GError **error, ...) G_GNUC_NULL_TERMINATED; GDK_PIXBUF_AVAILABLE_IN_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); GDK_PIXBUF_AVAILABLE_IN_2_14 GdkPixbuf *gdk_pixbuf_new_from_stream (GInputStream *stream, GCancellable *cancellable, GError **error); GDK_PIXBUF_AVAILABLE_IN_ALL void gdk_pixbuf_new_from_stream_async (GInputStream *stream, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data); GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *gdk_pixbuf_new_from_stream_finish (GAsyncResult *async_result, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_14 GdkPixbuf *gdk_pixbuf_new_from_stream_at_scale (GInputStream *stream, gint width, gint height, gboolean preserve_aspect_ratio, GCancellable *cancellable, GError **error); GDK_PIXBUF_AVAILABLE_IN_ALL 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); GDK_PIXBUF_AVAILABLE_IN_2_14 gboolean gdk_pixbuf_save_to_stream (GdkPixbuf *pixbuf, GOutputStream *stream, const char *type, GCancellable *cancellable, GError **error, ...); GDK_PIXBUF_AVAILABLE_IN_ALL void gdk_pixbuf_save_to_stream_async (GdkPixbuf *pixbuf, GOutputStream *stream, const gchar *type, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data, ...); GDK_PIXBUF_AVAILABLE_IN_ALL gboolean gdk_pixbuf_save_to_stream_finish (GAsyncResult *async_result, GError **error); GDK_PIXBUF_AVAILABLE_IN_2_36 void gdk_pixbuf_save_to_streamv_async (GdkPixbuf *pixbuf, GOutputStream *stream, const gchar *type, gchar **option_keys, gchar **option_values, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data); GDK_PIXBUF_AVAILABLE_IN_2_36 gboolean gdk_pixbuf_save_to_streamv (GdkPixbuf *pixbuf, GOutputStream *stream, const char *type, char **option_keys, char **option_values, GCancellable *cancellable, GError **error); /* Adding an alpha channel */ GDK_PIXBUF_AVAILABLE_IN_ALL 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 */ GDK_PIXBUF_AVAILABLE_IN_ALL 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 */ GDK_PIXBUF_AVAILABLE_IN_ALL 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 */ GDK_PIXBUF_AVAILABLE_IN_2_12 GdkPixbuf *gdk_pixbuf_apply_embedded_orientation (GdkPixbuf *src); /* key/value pairs that can be attached by the pixbuf loader */ GDK_PIXBUF_AVAILABLE_IN_ALL gboolean gdk_pixbuf_set_option (GdkPixbuf *pixbuf, const gchar *key, const gchar *value); GDK_PIXBUF_AVAILABLE_IN_ALL const gchar * gdk_pixbuf_get_option (GdkPixbuf *pixbuf, const gchar *key); GDK_PIXBUF_AVAILABLE_IN_2_36 gboolean gdk_pixbuf_remove_option (GdkPixbuf *pixbuf, const gchar *key); GDK_PIXBUF_AVAILABLE_IN_2_32 GHashTable * gdk_pixbuf_get_options (GdkPixbuf *pixbuf); GDK_PIXBUF_AVAILABLE_IN_2_36 gboolean gdk_pixbuf_copy_options (GdkPixbuf *src_pixbuf, GdkPixbuf *dest_pixbuf); G_END_DECLS #endif /* GDK_PIXBUF_CORE_H */