This enumeration defines the color spaces that are supported by the gdk-pixbuf library. Currently only RGB is supported. Indicates a red/green/blue additive color space. This enumeration describes the different interpolation modes that can be used with the scaling functions. `InterpType::Nearest` is the fastest scaling method, but has horrible quality when scaling down. `InterpType::Bilinear` is the best choice if you aren't sure what to choose, it has a good speed/quality balance. **Note**: Cubic filtering is missing from the list; hyperbolic interpolation is just as fast and results in higher quality. Nearest neighbor sampling; this is the fastest and lowest quality mode. Quality is normally unacceptable when scaling down, but may be OK when scaling up. This is an accurate simulation of the PostScript image operator without any interpolation enabled. Each pixel is rendered as a tiny parallelogram of solid color, the edges of which are implemented with antialiasing. It resembles nearest neighbor for enlargement, and bilinear for reduction. Best quality/speed balance; use this mode by default. Bilinear interpolation. For enlargement, it is equivalent to point-sampling the ideal bilinear-interpolated image. For reduction, it is equivalent to laying down small tiles and integrating over the coverage area. This is the slowest and highest quality reconstruction function. It is derived from the hyperbolic filters in Wolberg's "Digital Image Warping", and is formally defined as the hyperbolic-filter sampling the ideal hyperbolic-filter interpolated image (the filter is designed to be idempotent for 1:1 pixel mapping). **Deprecated**: this interpolation filter is deprecated, as in reality it has a lower quality than the `InterpType::Bilinear` filter (Since: 2.38) 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). # Implements [`gio::IconExt`](../gio/trait.IconExt.html), [`gio::LoadableIconExt`](../gio/trait.LoadableIconExt.html) Creates a new `Pixbuf` structure and allocates a buffer for it. The buffer has an optimal rowstride. Note that the buffer is not cleared; you will have to fill it completely yourself. ## `colorspace` Color space for image ## `has_alpha` Whether the image should have transparency information ## `bits_per_sample` Number of bits per color sample ## `width` Width of image in pixels, must be > 0 ## `height` Height of image in pixels, must be > 0 # Returns A newly-created `Pixbuf` with a reference count of 1, or `None` if not enough memory could be allocated for the image buffer. Creates a new `Pixbuf` out of in-memory readonly image data. Currently only RGB images with 8 bits per sample are supported. This is the `glib::Bytes` variant of `Pixbuf::new_from_data`. Feature: `v2_32` ## `data` Image data in 8-bit/sample packed format inside a `glib::Bytes` ## `colorspace` Colorspace for the image data ## `has_alpha` Whether the data has an opacity channel ## `bits_per_sample` Number of bits per sample ## `width` Width of the image in pixels, must be > 0 ## `height` Height of the image in pixels, must be > 0 ## `rowstride` Distance in bytes between row starts # Returns A newly-created `Pixbuf` structure with a reference count of 1. Creates a new `Pixbuf` out of in-memory image data. Currently only RGB images with 8 bits per sample are supported. Since you are providing a pre-allocated pixel buffer, you must also specify a way to free that data. This is done with a function of type ``GdkPixbufDestroyNotify``. When a pixbuf created with is finalized, your destroy notification function will be called, and it is its responsibility to free the pixel array. See also `Pixbuf::new_from_bytes`. ## `data` Image data in 8-bit/sample packed format ## `colorspace` Colorspace for the image data ## `has_alpha` Whether the data has an opacity channel ## `bits_per_sample` Number of bits per sample ## `width` Width of the image in pixels, must be > 0 ## `height` Height of the image in pixels, must be > 0 ## `rowstride` Distance in bytes between row starts ## `destroy_fn` Function used to free the data when the pixbuf's reference count drops to zero, or `None` if the data should not be freed ## `destroy_fn_data` Closure data to pass to the destroy notification function # Returns A newly-created `Pixbuf` structure with a reference count of 1. Creates a new pixbuf by loading an image from a file. The file format is detected automatically. If `None` is returned, then `error` will be set. Possible errors are in the `GDK_PIXBUF_ERROR` and `G_FILE_ERROR` domains. ## `filename` Name of file to load, in the GLib file name encoding # Returns A newly-created pixbuf with a reference count of 1, or `None` 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. Creates a new pixbuf by loading an image from a file. The file format is detected automatically. If `None` 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, optionally preserving the image's aspect ratio. When preserving the aspect ratio, a `width` of -1 will cause the image to be scaled to the exact given height, and a `height` of -1 will cause the image to be scaled to the exact given width. When not preserving aspect ratio, a `width` or `height` of -1 means to not scale the image at all in that dimension. Negative values for `width` and `height` are allowed since 2.8. ## `filename` Name of file to load, in the GLib file name encoding ## `width` The width the image should have or -1 to not constrain the width ## `height` The height the image should have or -1 to not constrain the height ## `preserve_aspect_ratio` `true` to preserve the image's aspect ratio # Returns A newly-created pixbuf with a reference count of 1, or `None` 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. Creates a new pixbuf by loading an image from a file. The file format is detected automatically. If `None` 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 the image's aspect ratio. Note that the returned pixbuf may be smaller than `width` x `height`, if the aspect ratio requires it. To load and image at the requested size, regardless of aspect ratio, use `Pixbuf::new_from_file_at_scale`. ## `filename` Name of file to load, in the GLib file name encoding ## `width` The width the image should have or -1 to not constrain the width ## `height` The height the image should have or -1 to not constrain the height # Returns A newly-created pixbuf with a reference count of 1, or `None` 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. Create a `Pixbuf` from a flat representation that is suitable for storing as inline data in a program. This is useful if you want to ship a program with images, but don't want to depend on any external files. gdk-pixbuf ships with a program called [gdk-pixbuf-csource][gdk-pixbuf-csource], which allows for conversion of ``GdkPixbufs`` into such a inline representation. In almost all cases, you should pass the `--raw` option to `gdk-pixbuf-csource`. A sample invocation would be: ```text gdk-pixbuf-csource --raw --name=myimage_inline myimage.png ``` For the typical case where the inline pixbuf is read-only static data, you don't need to copy the pixel data unless you intend to write to it, so you can pass `false` for `copy_pixels`. (If you pass `--rle` to `gdk-pixbuf-csource`, a copy will be made even if `copy_pixels` is `false`, so using this option is generally a bad idea.) If you create a pixbuf from const inline data compiled into your program, it's probably safe to ignore errors and disable length checks, since things will always succeed: ```text pixbuf = gdk_pixbuf_new_from_inline (-1, myimage_inline, FALSE, NULL); ``` For non-const inline data, you could get out of memory. For untrusted inline data located at runtime, you could have corrupt inline data in addition. # Deprecated since 2.32 Use `gio::Resource` instead. ## `data_length` Length in bytes of the `data` argument or -1 to disable length checks ## `data` Byte data containing a serialized ``GdkPixdata`` structure ## `copy_pixels` Whether to copy the pixel data, or use direct pointers `data` for the resulting pixbuf # Returns A newly-created `Pixbuf` structure with a reference, count of 1, or `None` if an error occurred. Creates a new pixbuf by loading an image from an resource. The file format is detected automatically. If `None` is returned, then `error` will be set. ## `resource_path` the path of the resource file # Returns A newly-created pixbuf, or `None` if any of several error conditions occurred: the file could not be opened, the image format is not supported, there was not enough memory to allocate the image buffer, the stream contained invalid data, or the operation was cancelled. Creates a new pixbuf by loading an image from an resource. The file format is detected automatically. If `None` is returned, then `error` will be set. The image will be scaled to fit in the requested size, optionally preserving the image's aspect ratio. When preserving the aspect ratio, a `width` of -1 will cause the image to be scaled to the exact given height, and a `height` of -1 will cause the image to be scaled to the exact given width. When not preserving aspect ratio, a `width` or `height` of -1 means to not scale the image at all in that dimension. The stream is not closed. ## `resource_path` the path of the resource file ## `width` The width the image should have or -1 to not constrain the width ## `height` The height the image should have or -1 to not constrain the height ## `preserve_aspect_ratio` `true` to preserve the image's aspect ratio # Returns A newly-created pixbuf, or `None` if any of several error conditions occurred: the file could not be opened, the image format is not supported, there was not enough memory to allocate the image buffer, the stream contained invalid data, or the operation was cancelled. Creates a new pixbuf by loading an image from an input stream. The file format is detected automatically. If `None` is returned, then `error` will be set. The `cancellable` can be used to abort the operation from another thread. If the operation was cancelled, the error `gio::IOErrorEnum::Cancelled` will be returned. Other possible errors are in the `GDK_PIXBUF_ERROR` and `G_IO_ERROR` domains. The stream is not closed. ## `stream` a `gio::InputStream` to load the pixbuf from ## `cancellable` optional `gio::Cancellable` object, `None` to ignore # Returns A newly-created pixbuf, or `None` if any of several error conditions occurred: the file could not be opened, the image format is not supported, there was not enough memory to allocate the image buffer, the stream contained invalid data, or the operation was cancelled. Creates a new pixbuf by loading an image from an input stream. The file format is detected automatically. If `None` is returned, then `error` will be set. The `cancellable` can be used to abort the operation from another thread. If the operation was cancelled, the error `gio::IOErrorEnum::Cancelled` will be returned. Other possible errors are in the `GDK_PIXBUF_ERROR` and `G_IO_ERROR` domains. The image will be scaled to fit in the requested size, optionally preserving the image's aspect ratio. When preserving the aspect ratio, a `width` of -1 will cause the image to be scaled to the exact given height, and a `height` of -1 will cause the image to be scaled to the exact given width. If both `width` and `height` are given, this function will behave as if the smaller of the two values is passed as -1. When not preserving aspect ratio, a `width` or `height` of -1 means to not scale the image at all in that dimension. The stream is not closed. ## `stream` a `gio::InputStream` to load the pixbuf from ## `width` The width the image should have or -1 to not constrain the width ## `height` The height the image should have or -1 to not constrain the height ## `preserve_aspect_ratio` `true` to preserve the image's aspect ratio ## `cancellable` optional `gio::Cancellable` object, `None` to ignore # Returns A newly-created pixbuf, or `None` if any of several error conditions occurred: the file could not be opened, the image format is not supported, there was not enough memory to allocate the image buffer, the stream contained invalid data, or the operation was cancelled. Finishes an asynchronous pixbuf creation operation started with `Pixbuf::new_from_stream_async`. ## `async_result` a `gio::AsyncResult` # Returns a `Pixbuf` or `None` on error. Free the returned object with `gobject::Object::unref`. 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. ## `data` Pointer to inline XPM data. # Returns A newly-created pixbuf with a reference count of 1. Calculates the rowstride that an image created with those values would have. This is useful for front-ends and backends that want to sanity check image values without needing to create them. Feature: `v2_36_8` ## `colorspace` Color space for image ## `has_alpha` Whether the image should have transparency information ## `bits_per_sample` Number of bits per color sample ## `width` Width of image in pixels, must be > 0 ## `height` Height of image in pixels, must be > 0 # Returns the rowstride for the given values, or -1 in case of error. Parses an image file far enough to determine its format and size. ## `filename` The name of the file to identify. ## `width` Return location for the width of the image, or `None` ## `height` Return location for the height of the image, or `None` # Returns A `PixbufFormat` describing the image format of the file or `None` if the image format wasn't recognized. The return value is owned by `Pixbuf` and should not be freed. Asynchronously parses an image file far enough to determine its format and size. For more details see `Pixbuf::get_file_info`, which is the synchronous version of this function. When the operation is finished, `callback` will be called in the main thread. You can then call `Pixbuf::get_file_info_finish` to get the result of the operation. Feature: `v2_32` ## `filename` The name of the file to identify ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `callback` a `GAsyncReadyCallback` to call when the file info is available ## `user_data` the data to pass to the callback function Finishes an asynchronous pixbuf parsing operation started with `Pixbuf::get_file_info_async`. Feature: `v2_32` ## `async_result` a `gio::AsyncResult` ## `width` Return location for the width of the image, or `None` ## `height` Return location for the height of the image, or `None` # Returns A `PixbufFormat` describing the image format of the file or `None` if the image format wasn't recognized. The return value is owned by `Pixbuf` and should not be freed. Obtains the available information about the image formats supported by `Pixbuf`. # Returns A list of ``GdkPixbufFormats`` describing the supported image formats. The list should be freed when it is no longer needed, but the structures themselves are owned by `Pixbuf` and should not be freed. Initalizes the gdk-pixbuf loader modules referenced by the loaders.cache file present inside that directory. This is to be used by applications that want to ship certain loaders in a different location from the system ones. This is needed when the OS or runtime ships a minimal number of loaders so as to reduce the potential attack surface of carefully crafted image files, especially for uncommon file types. Applications that require broader image file types coverage, such as image viewers, would be expected to ship the gdk-pixbuf modules in a separate location, bundled with the application in a separate directory from the OS or runtime- provided modules. Feature: `v2_40` ## `path` Path to directory where the loaders.cache is installed Creates a new pixbuf by asynchronously loading an image from an input stream. For more details see `Pixbuf::new_from_stream`, which is the synchronous version of this function. When the operation is finished, `callback` will be called in the main thread. You can then call `Pixbuf::new_from_stream_finish` to get the result of the operation. ## `stream` a `gio::InputStream` from which to load the pixbuf ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `callback` a `GAsyncReadyCallback` to call when the pixbuf is loaded ## `user_data` the data to pass to the callback function Creates a new pixbuf by asynchronously loading an image from an input stream. For more details see `Pixbuf::new_from_stream_at_scale`, which is the synchronous version of this function. When the operation is finished, `callback` will be called in the main thread. You can then call `Pixbuf::new_from_stream_finish` to get the result of the operation. ## `stream` a `gio::InputStream` from which to load the pixbuf ## `width` the width the image should have or -1 to not constrain the width ## `height` the height the image should have or -1 to not constrain the height ## `preserve_aspect_ratio` `true` to preserve the image's aspect ratio ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `callback` a `GAsyncReadyCallback` to call when the pixbuf is loaded ## `user_data` the data to pass to the callback function Finishes an asynchronous pixbuf save operation started with `Pixbuf::save_to_stream_async`. ## `async_result` a `gio::AsyncResult` # Returns `true` if the pixbuf was saved successfully, `false` if an error was set. Takes an existing pixbuf and adds an alpha channel to it. If the existing pixbuf already had an alpha channel, the channel values are copied from the original; otherwise, the alpha channel is initialized to 255 (full opacity). If `substitute_color` is `true`, then the color specified by (`r`, `g`, `b`) will be assigned zero opacity. That is, if you pass (255, 255, 255) for the substitute color, all white pixels will become fully transparent. ## `substitute_color` Whether to set a color to zero opacity. If this is `false`, then the (`r`, `g`, `b`) arguments will be ignored. ## `r` Red value to substitute. ## `g` Green value to substitute. ## `b` Blue value to substitute. # Returns A newly-created pixbuf with a reference count of 1. Takes an existing pixbuf and checks for the presence of an associated "orientation" option, which may be provided by the jpeg loader (which reads the exif orientation tag) or the tiff loader (which reads the tiff orientation tag, and compensates it for the partial transforms performed by libtiff). If an orientation option/tag is present, the appropriate transform will be performed so that the pixbuf is oriented correctly. # Returns A newly-created pixbuf, `None` if not enough memory could be allocated for it, or a reference to the input pixbuf (with an increased reference count). Creates a transformation of the source image `self` by scaling by `scale_x` and `scale_y` then translating by `offset_x` and `offset_y`. This gives an image in the coordinates of the destination pixbuf. The rectangle (`dest_x`, `dest_y`, `dest_width`, `dest_height`) is then alpha blended onto the corresponding rectangle of the original destination image. When the destination rectangle contains parts not in the source image, the data at the edges of the source image is replicated to infinity.  ## `dest` the `Pixbuf` into which to render the results ## `dest_x` the left coordinate for region to render ## `dest_y` the top coordinate for region to render ## `dest_width` the width of the region to render ## `dest_height` the height of the region to render ## `offset_x` the offset in the X direction (currently rounded to an integer) ## `offset_y` the offset in the Y direction (currently rounded to an integer) ## `scale_x` the scale factor in the X direction ## `scale_y` the scale factor in the Y direction ## `interp_type` the interpolation type for the transformation. ## `overall_alpha` overall alpha for source image (0..255) Creates a transformation of the source image `self` by scaling by `scale_x` and `scale_y` then translating by `offset_x` and `offset_y`, then alpha blends the rectangle (`dest_x` ,`dest_y`, `dest_width`, `dest_height`) of the resulting image with a checkboard of the colors `color1` and `color2` and renders it onto the destination image. If the source image has no alpha channel, and `overall_alpha` is 255, a fast path is used which omits the alpha blending and just performs the scaling. See `Pixbuf::composite_color_simple` for a simpler variant of this function suitable for many tasks. ## `dest` the `Pixbuf` into which to render the results ## `dest_x` the left coordinate for region to render ## `dest_y` the top coordinate for region to render ## `dest_width` the width of the region to render ## `dest_height` the height of the region to render ## `offset_x` the offset in the X direction (currently rounded to an integer) ## `offset_y` the offset in the Y direction (currently rounded to an integer) ## `scale_x` the scale factor in the X direction ## `scale_y` the scale factor in the Y direction ## `interp_type` the interpolation type for the transformation. ## `overall_alpha` overall alpha for source image (0..255) ## `check_x` the X offset for the checkboard (origin of checkboard is at -`check_x`, -`check_y`) ## `check_y` the Y offset for the checkboard ## `check_size` the size of checks in the checkboard (must be a power of two) ## `color1` the color of check at upper left ## `color2` the color of the other check Creates a new `Pixbuf` by scaling `self` to `dest_width` x `dest_height` and alpha blending the result with a checkboard of colors `color1` and `color2`. ## `dest_width` the width of destination image ## `dest_height` the height of destination image ## `interp_type` the interpolation type for the transformation. ## `overall_alpha` overall alpha for source image (0..255) ## `check_size` the size of checks in the checkboard (must be a power of two) ## `color1` the color of check at upper left ## `color2` the color of the other check # Returns the new `Pixbuf`, or `None` if not enough memory could be allocated for it. Creates a new `Pixbuf` with a copy of the information in the specified `self`. Note that this does not copy the options set on the original `Pixbuf`, use `Pixbuf::copy_options` for this. # Returns A newly-created pixbuf with a reference count of 1, or `None` if not enough memory could be allocated. Copies a rectangular area from `self` to `dest_pixbuf`. Conversion of pixbuf formats is done automatically. If the source rectangle overlaps the destination rectangle on the same pixbuf, it will be overwritten during the copy operation. Therefore, you can not use this function to scroll a pixbuf. ## `src_x` Source X coordinate within `self`. ## `src_y` Source Y coordinate within `self`. ## `width` Width of the area to copy. ## `height` Height of the area to copy. ## `dest_pixbuf` Destination pixbuf. ## `dest_x` X coordinate within `dest_pixbuf`. ## `dest_y` Y coordinate within `dest_pixbuf`. Copy the key/value pair options attached to a `Pixbuf` to another. This is useful to keep original metadata after having manipulated a file. However be careful to remove metadata which you've already applied, such as the "orientation" option after rotating the image. Feature: `v2_36` ## `dest_pixbuf` the `Pixbuf` to copy options to # Returns `true` on success. Clears a pixbuf to the given RGBA value, converting the RGBA value into the pixbuf's pixel format. The alpha will be ignored if the pixbuf doesn't have an alpha channel. ## `pixel` RGBA pixel to clear to (0xffffffff is opaque white, 0x00000000 transparent black) Flips a pixbuf horizontally or vertically and returns the result in a new pixbuf. ## `horizontal` `true` to flip horizontally, `false` to flip vertically # Returns the new `Pixbuf`, or `None` if not enough memory could be allocated for it. Queries the number of bits per color sample in a pixbuf. # Returns Number of bits per color sample. Returns the length of the pixel data, in bytes. # Returns The length of the pixel data. Queries the color space of a pixbuf. # Returns Color space. Queries whether a pixbuf has an alpha channel (opacity information). # Returns `true` if it has an alpha channel, `false` otherwise. Queries the height of a pixbuf. # Returns Height in pixels. Queries the number of channels of a pixbuf. # Returns Number of channels. Looks up `key` in the list of options that may have been attached to the `self` when it was loaded, or that may have been attached by another function using `Pixbuf::set_option`. For instance, the ANI loader provides "Title" and "Artist" options. The ICO, XBM, and XPM loaders provide "x_hot" and "y_hot" hot-spot options for cursor definitions. The PNG loader provides the tEXt ancillary chunk key/value pairs as options. Since 2.12, the TIFF and JPEG loaders return an "orientation" option string that corresponds to the embedded TIFF/Exif orientation tag (if present). Since 2.32, the TIFF loader sets the "multipage" option string to "yes" when a multi-page TIFF is loaded. Since 2.32 the JPEG and PNG loaders set "x-dpi" and "y-dpi" if the file contains image density information in dots per inch. Since 2.36.6, the JPEG loader sets the "comment" option with the comment EXIF tag. ## `key` a nul-terminated string. # Returns the value associated with `key`. This is a nul-terminated string that should not be freed or `None` if `key` was not found. Returns a `glib::HashTable` with a list of all the options that may have been attached to the `self` when it was loaded, or that may have been attached by another function using `Pixbuf::set_option`. See `Pixbuf::get_option` for more details. Feature: `v2_32` # Returns a `glib::HashTable` of key/values Queries a pointer to the pixel data of a pixbuf. # Returns A pointer to the pixbuf's pixel data. Please see the section on [image data][image-data] for information about how the pixel data is stored in memory. This function will cause an implicit copy of the pixbuf data if the pixbuf was created from read-only data. Queries a pointer to the pixel data of a pixbuf. ## `length` The length of the binary data. # Returns A pointer to the pixbuf's pixel data. Please see the section on [image data][image-data] for information about how the pixel data is stored in memory. This function will cause an implicit copy of the pixbuf data if the pixbuf was created from read-only data. Queries the rowstride of a pixbuf, which is the number of bytes between the start of a row and the start of the next row. # Returns Distance between row starts. Queries the width of a pixbuf. # Returns Width in pixels. Creates a new pixbuf which represents a sub-region of `self`. The new pixbuf shares its pixels with the original pixbuf, so writing to one affects both. The new pixbuf holds a reference to `self`, so `self` will not be finalized until the new pixbuf is finalized. Note that if `self` is read-only, this function will force it to be mutable. ## `src_x` X coord in `self` ## `src_y` Y coord in `self` ## `width` width of region in `self` ## `height` height of region in `self` # Returns a new pixbuf Provides a `glib::Bytes` buffer containing the raw pixel data; the data must not be modified. This function allows skipping the implicit copy that must be made if `Pixbuf::get_pixels` is called on a read-only pixbuf. Feature: `v2_32` # Returns A new reference to a read-only copy of the pixel data. Note that for mutable pixbufs, this function will incur a one-time copy of the pixel data for conversion into the returned `glib::Bytes`. Provides a read-only pointer to the raw pixel data; must not be modified. This function allows skipping the implicit copy that must be made if `Pixbuf::get_pixels` is called on a read-only pixbuf. Feature: `v2_32` # Returns a read-only pointer to the raw pixel data Remove the key/value pair option attached to a `Pixbuf`. Feature: `v2_36` ## `key` a nul-terminated string representing the key to remove. # Returns `true` if an option was removed, `false` if not. Rotates a pixbuf by a multiple of 90 degrees, and returns the result in a new pixbuf. If `angle` is 0, a copy of `self` is returned, avoiding any rotation. ## `angle` the angle to rotate by # Returns the new `Pixbuf`, or `None` if not enough memory could be allocated for it. Modifies saturation and optionally pixelates `self`, placing the result in `dest`. `self` and `dest` may be the same pixbuf with no ill effects. If `saturation` is 1.0 then saturation is not changed. If it's less than 1.0, saturation is reduced (the image turns toward grayscale); if greater than 1.0, saturation is increased (the image gets more vivid colors). If `pixelate` is `true`, then pixels are faded in a checkerboard pattern to create a pixelated image. `self` and `dest` must have the same image format, size, and rowstride. ## `dest` place to write modified version of `self` ## `saturation` saturation factor ## `pixelate` whether to pixelate Saves pixbuf to a file in format `type_`. By default, "jpeg", "png", "ico" and "bmp" 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: ```text 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); ``` 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 `None`-terminated; if not empty, it should contain pairs of strings that modify the save parameters. For example: ```text gdk_pixbuf_save (pixbuf, handle, "jpeg", &error, "quality", "100", NULL); ``` Currently only few parameters exist. JPEG images can be saved with a "quality" parameter; its value should be in the range [0,100]. JPEG and PNG density can be set by setting the "x-dpi" and "y-dpi" parameters to the appropriate values in dots per inch. 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. The PNG compression level can be specified using the "compression" parameter; it's value is in an integer in the range of [0,9]. ICC color profiles can also be embedded into PNG, JPEG and TIFF images. The "icc-profile" value should be the complete ICC profile encoded into base64. ```text gchar *contents; gchar *contents_encode; gsize length; g_file_get_contents ("/home/hughsie/.color/icc/L225W.icm", &contents, &length, NULL); contents_encode = g_base64_encode ((const guchar *) contents, length); gdk_pixbuf_save (pixbuf, handle, "png", &error, "icc-profile", contents_encode, NULL); ``` TIFF images recognize: (1) a "bits-per-sample" option (integer) which can be either 1 for saving bi-level CCITTFAX4 images, or 8 for saving 8-bits per sample; (2) a "compression" option (integer) which can be 1 for no compression, 2 for Huffman, 5 for LZW, 7 for JPEG and 8 for DEFLATE (see the libtiff documentation and tiff.h for all supported codec values); (3) an "icc-profile" option (zero-terminated string) containing a base64 encoded ICC color profile. 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. ## `filename` name of file to save. ## `type_` name of file format. ## `error` return location for error, or `None` # Returns whether an error was set Saves pixbuf to a new buffer in format `type_`, which is currently "jpeg", "png", "tiff", "ico" or "bmp". This is a convenience function that uses `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 `buffer` will be set to `None`. Possible errors include those in the `GDK_PIXBUF_ERROR` domain. See `Pixbuf::save` for more details. ## `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 `None` # Returns whether an error was set Saves pixbuf to a new buffer in format `type_`, which is currently "jpeg", "tiff", "png", "ico" or "bmp". See `Pixbuf::save_to_buffer` for more details. ## `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, `None`-terminated ## `option_values` values for named options # Returns whether an error was set 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 `Pixbuf::save` for more details. ## `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 `None` # Returns whether an error was set Saves pixbuf to a callback in format `type_`, which is currently "jpeg", "png", "tiff", "ico" or "bmp". If `error` is set, `false` will be returned. See gdk_pixbuf_save_to_callback () for more details. ## `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, `None`-terminated ## `option_values` values for named options # Returns whether an error was set Saves `self` to an output stream. Supported file formats are currently "jpeg", "tiff", "png", "ico" or "bmp". See `Pixbuf::save_to_buffer` for more details. The `cancellable` can be used to abort the operation from another thread. If the operation was cancelled, the error `gio::IOErrorEnum::Cancelled` will be returned. Other possible errors are in the `GDK_PIXBUF_ERROR` and `G_IO_ERROR` domains. The stream is not closed. ## `stream` a `gio::OutputStream` to save the pixbuf to ## `type_` name of file format ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `error` return location for error, or `None` # Returns `true` if the pixbuf was saved successfully, `false` if an error was set. Saves `self` to an output stream asynchronously. For more details see `Pixbuf::save_to_stream`, which is the synchronous version of this function. When the operation is finished, `callback` will be called in the main thread. You can then call `Pixbuf::save_to_stream_finish` to get the result of the operation. ## `stream` a `gio::OutputStream` to which to save the pixbuf ## `type_` name of file format ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `callback` a `GAsyncReadyCallback` to call when the pixbuf is saved ## `user_data` the data to pass to the callback function Saves `self` to an output stream. Supported file formats are currently "jpeg", "tiff", "png", "ico" or "bmp". See `Pixbuf::save_to_stream` for more details. Feature: `v2_36` ## `stream` a `gio::OutputStream` to save the pixbuf to ## `type_` name of file format ## `option_keys` name of options to set, `None`-terminated ## `option_values` values for named options ## `cancellable` optional `gio::Cancellable` object, `None` to ignore # Returns `true` if the pixbuf was saved successfully, `false` if an error was set. Saves `self` to an output stream asynchronously. For more details see `Pixbuf::save_to_streamv`, which is the synchronous version of this function. When the operation is finished, `callback` will be called in the main thread. You can then call `Pixbuf::save_to_stream_finish` to get the result of the operation. Feature: `v2_36` ## `stream` a `gio::OutputStream` to which to save the pixbuf ## `type_` name of file format ## `option_keys` name of options to set, `None`-terminated ## `option_values` values for named options ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `callback` a `GAsyncReadyCallback` to call when the pixbuf is saved ## `user_data` the data to pass to the callback function Saves pixbuf to a file in `type_`, which is currently "jpeg", "png", "tiff", "ico" or "bmp". If `error` is set, `false` will be returned. See gdk_pixbuf_save () for more details. ## `filename` name of file to save. ## `type_` name of file format. ## `option_keys` name of options to set, `None`-terminated ## `option_values` values for named options # Returns whether an error was set Creates a transformation of the source image `self` by scaling by `scale_x` and `scale_y` then translating by `offset_x` and `offset_y`, then renders the rectangle (`dest_x`, `dest_y`, `dest_width`, `dest_height`) of the resulting image onto the destination image replacing the previous contents. Try to use `Pixbuf::scale_simple` first, this function is the industrial-strength power tool you can fall back to if `Pixbuf::scale_simple` isn't powerful enough. If the source rectangle overlaps the destination rectangle on the same pixbuf, it will be overwritten during the scaling which results in rendering artifacts. ## `dest` the `Pixbuf` into which to render the results ## `dest_x` the left coordinate for region to render ## `dest_y` the top coordinate for region to render ## `dest_width` the width of the region to render ## `dest_height` the height of the region to render ## `offset_x` the offset in the X direction (currently rounded to an integer) ## `offset_y` the offset in the Y direction (currently rounded to an integer) ## `scale_x` the scale factor in the X direction ## `scale_y` the scale factor in the Y direction ## `interp_type` the interpolation type for the transformation. Create a new `Pixbuf` containing a copy of `self` scaled to `dest_width` x `dest_height`. Leaves `self` unaffected. `interp_type` should be `InterpType::Nearest` if you want maximum speed (but when scaling down `InterpType::Nearest` is usually unusably ugly). The default `interp_type` should be `InterpType::Bilinear` which offers reasonable quality and speed. You can scale a sub-portion of `self` by creating a sub-pixbuf pointing into `self`; see `Pixbuf::new_subpixbuf`. If `dest_width` and `dest_height` are equal to the `self` width and height, a copy of `self` is returned, avoiding any scaling. For more complicated scaling/alpha blending see `Pixbuf::scale` and `Pixbuf::composite`. ## `dest_width` the width of destination image ## `dest_height` the height of destination image ## `interp_type` the interpolation type for the transformation. # Returns the new `Pixbuf`, or `None` if not enough memory could be allocated for it. Attaches a key/value pair as an option to a `Pixbuf`. If `key` already exists in the list of options attached to `self`, the new value is ignored and `false` is returned. ## `key` a nul-terminated string. ## `value` a nul-terminated string. # Returns `true` on success. The number of bits per sample. Currently only 8 bit per sample are supported. The number of bits per sample. Currently only 8 bit per sample are supported. The number of samples per pixel. Currently, only 3 or 4 samples per pixel are supported. The number of samples per pixel. Currently, only 3 or 4 samples per pixel are supported. The number of bytes between the start of a row and the start of the next row. This number must (obviously) be at least as large as the width of the pixbuf. The number of bytes between the start of a row and the start of the next row. This number must (obviously) be at least as large as the width of the pixbuf. These values can be passed to `gdk_pixbuf_xlib_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. 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. For now falls back to `PixbufAlphaMode::Bilevel`. In the future it will do full alpha compositing. An opaque struct representing an animation. # Implements [`PixbufAnimationExt`](trait.PixbufAnimationExt.html) Trait containing all `PixbufAnimation` methods. # Implementors [`PixbufAnimation`](struct.PixbufAnimation.html), [`PixbufSimpleAnim`](struct.PixbufSimpleAnim.html) Creates a new animation by loading it from a file. The file format is detected automatically. If the file's format does not support multi-frame images, then an animation with a single frame will be created. Possible errors are in the `GDK_PIXBUF_ERROR` and `G_FILE_ERROR` domains. ## `filename` Name of file to load, in the GLib file name encoding # Returns A newly-created animation with a reference count of 1, or `None` if any of several error conditions ocurred: 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. Creates a new pixbuf animation by loading an image from an resource. The file format is detected automatically. If `None` is returned, then `error` will be set. ## `resource_path` the path of the resource file # Returns A newly-created animation, or `None` if any of several error conditions occurred: the file could not be opened, the image format is not supported, there was not enough memory to allocate the image buffer, the stream contained invalid data, or the operation was cancelled. Creates a new animation by loading it from an input stream. The file format is detected automatically. If `None` is returned, then `error` will be set. The `cancellable` can be used to abort the operation from another thread. If the operation was cancelled, the error `gio::IOErrorEnum::Cancelled` will be returned. Other possible errors are in the `GDK_PIXBUF_ERROR` and `G_IO_ERROR` domains. The stream is not closed. ## `stream` a `gio::InputStream` to load the pixbuf from ## `cancellable` optional `gio::Cancellable` object, `None` to ignore # Returns A newly-created pixbuf, or `None` if any of several error conditions occurred: the file could not be opened, the image format is not supported, there was not enough memory to allocate the image buffer, the stream contained invalid data, or the operation was cancelled. Finishes an asynchronous pixbuf animation creation operation started with `PixbufAnimation::new_from_stream_async`. ## `async_result` a `gio::AsyncResult` # Returns a `PixbufAnimation` or `None` on error. Free the returned object with `gobject::Object::unref`. Creates a new animation by asynchronously loading an image from an input stream. For more details see `Pixbuf::new_from_stream`, which is the synchronous version of this function. When the operation is finished, `callback` will be called in the main thread. You can then call `PixbufAnimation::new_from_stream_finish` to get the result of the operation. ## `stream` a `gio::InputStream` from which to load the animation ## `cancellable` optional `gio::Cancellable` object, `None` to ignore ## `callback` a `GAsyncReadyCallback` to call when the pixbuf is loaded ## `user_data` the data to pass to the callback function Queries the height of the bounding box of a pixbuf animation. # Returns Height of the bounding box of the animation. Get an iterator for displaying an animation. The iterator provides the frames that should be displayed at a given time. It should be freed after use with `gobject::Object::unref`. `start_time` would normally come from `g_get_current_time`, and marks the beginning of animation playback. After creating an iterator, you should immediately display the pixbuf returned by `PixbufAnimationIterExt::get_pixbuf`. Then, you should install a timeout (with `g_timeout_add`) or by some other mechanism ensure that you'll update the image after `PixbufAnimationIterExt::get_delay_time` milliseconds. Each time the image is updated, you should reinstall the timeout with the new, possibly-changed delay time. As a shortcut, if `start_time` is `None`, the result of `g_get_current_time` will be used automatically. To update the image (i.e. possibly change the result of `PixbufAnimationIterExt::get_pixbuf` to a new frame of the animation), call `PixbufAnimationIterExt::advance`. If you're using `PixbufLoader`, in addition to updating the image after the delay time, you should also update it whenever you receive the area_updated signal and `PixbufAnimationIterExt::on_currently_loading_frame` returns `true`. In this case, the frame currently being fed into the loader has received new data, so needs to be refreshed. The delay time for a frame may also be modified after an area_updated signal, for example if the delay time for a frame is encoded in the data after the frame itself. So your timeout should be reinstalled after any area_updated signal. A delay time of -1 is possible, indicating "infinite." ## `start_time` time when the animation starts playing # Returns an iterator to move over the animation If an animation is really just a plain image (has only one frame), this function returns that image. If the animation is an animation, this function returns a reasonable thing to display as a static unanimated image, which might be the first frame, or something more sophisticated. If an animation hasn't loaded any frames yet, this function will return `None`. # Returns unanimated image representing the animation Queries the width of the bounding box of a pixbuf animation. # Returns Width of the bounding box of the animation. If you load a file with `PixbufAnimation::new_from_file` and it turns out to be a plain, unanimated image, then this function will return `true`. Use `PixbufAnimationExt::get_static_image` to retrieve the image. # Returns `true` if the "animation" was really just an image An opaque struct representing an iterator which points to a certain position in an animation. # Implements [`PixbufAnimationIterExt`](trait.PixbufAnimationIterExt.html) Trait containing all `PixbufAnimationIter` methods. # Implementors [`PixbufAnimationIter`](struct.PixbufAnimationIter.html) Possibly advances an animation to a new frame. Chooses the frame based on the start time passed to `PixbufAnimationExt::get_iter`. `current_time` would normally come from `g_get_current_time`, and must be greater than or equal to the time passed to `PixbufAnimationExt::get_iter`, and must increase or remain unchanged each time `PixbufAnimationIterExt::get_pixbuf` is called. That is, you can't go backward in time; animations only play forward. As a shortcut, pass `None` for the current time and `g_get_current_time` will be invoked on your behalf. So you only need to explicitly pass `current_time` if you're doing something odd like playing the animation at double speed. If this function returns `false`, there's no need to update the animation display, assuming the display had been rendered prior to advancing; if `true`, you need to call `PixbufAnimationIterExt::get_pixbuf` and update the display with the new pixbuf. ## `current_time` current time # Returns `true` if the image may need updating Gets the number of milliseconds the current pixbuf should be displayed, or -1 if the current pixbuf should be displayed forever. `g_timeout_add` conveniently takes a timeout in milliseconds, so you can use a timeout to schedule the next update. Note that some formats, like GIF, might clamp the timeout values in the image file to avoid updates that are just too quick. The minimum timeout for GIF images is currently 20 milliseconds. # Returns delay time in milliseconds (thousandths of a second) Gets the current pixbuf which should be displayed; the pixbuf might not be the same size as the animation itself (`PixbufAnimationExt::get_width`, `PixbufAnimationExt::get_height`). This pixbuf should be displayed for `PixbufAnimationIterExt::get_delay_time` milliseconds. The caller of this function does not own a reference to the returned pixbuf; the returned pixbuf will become invalid when the iterator advances to the next frame, which may happen anytime you call `PixbufAnimationIterExt::advance`. Copy the pixbuf to keep it (don't just add a reference), as it may get recycled as you advance the iterator. # Returns the pixbuf to be displayed Used to determine how to respond to the area_updated signal on `PixbufLoader` when loading an animation. area_updated is emitted for an area of the frame currently streaming in to the loader. So if you're on the currently loading frame, you need to redraw the screen for the updated area. # Returns `true` if the frame we're on is partially loaded, or the last frame 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. An image file was broken somehow. Not enough memory. A bad option was passed to a pixbuf save module. Unknown image type. Don't know how to perform the given operation on the type of image at hand. Generic failure code, something went wrong. Only part of the animation was loaded. Creates a copy of `self` # Returns the newly allocated copy of a `PixbufFormat`. Use `PixbufFormat::free` to free the resources when done Frees the resources allocated when copying a `PixbufFormat` using `PixbufFormat::copy` Returns a description of the format. # Returns a description of the format. Returns the filename extensions typically used for files in the given format. # Returns a `None`-terminated array of filename extensions which must be freed with `g_strfreev` when it is no longer needed. Returns information about the license of the image loader for the format. The returned string should be a shorthand for a wellknown license, e.g. "LGPL", "GPL", "QPL", "GPL/QPL", or "other" to indicate some other license. This string should be freed with `g_free` when it's no longer needed. # Returns a string describing the license of `self`. Returns the mime types supported by the format. # Returns a `None`-terminated array of mime types which must be freed with `g_strfreev` when it is no longer needed. Returns the name of the format. # Returns the name of the format. Returns whether this image format is disabled. See `PixbufFormat::set_disabled`. # Returns whether this image format is disabled. Returns `true` if the save option specified by `option_key` is supported when saving a pixbuf using the module implementing `self`. See `Pixbuf::save` for more information about option keys. Feature: `v2_36` ## `option_key` the name of an option # Returns `true` if the specified option is supported 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. # Returns whether this image format is scalable. Returns whether pixbufs can be saved in the given format. # Returns whether pixbufs can be saved in the given format. Disables or enables an image format. If a format is disabled, gdk-pixbuf won't use the image loader for this format to load images. Applications can use this to avoid using image loaders with an inappropriate license, see `PixbufFormat::get_license`. ## `disabled` `true` to disable the format `self` The `PixbufLoader` struct contains only private fields. # Implements [`PixbufLoaderExt`](trait.PixbufLoaderExt.html) Trait containing all `PixbufLoader` methods. # Implementors [`PixbufLoader`](struct.PixbufLoader.html) Creates a new pixbuf loader object. # Returns A newly-created pixbuf loader. Creates a new pixbuf loader object that always attempts to parse image data as if it were an image of mime type `mime_type`, instead of identifying the type automatically. Useful if you want an error if the image isn't the expected mime type, for loading image formats that can't be reliably identified by looking at the data, or if the user manually forces a specific mime type. The list of supported mime types depends on what image loaders are installed, but typically "image/png", "image/jpeg", "image/gif", "image/tiff" and "image/x-xpixmap" are among the supported mime types. To obtain the full list of supported mime types, call `PixbufFormat::get_mime_types` on each of the `PixbufFormat` structs returned by `Pixbuf::get_formats`. ## `mime_type` the mime type to be loaded # Returns A newly-created pixbuf loader. Creates a new pixbuf loader object that always attempts to parse image data as if it were an image of type `image_type`, instead of identifying the type automatically. Useful if you want an error if the image isn't the expected type, for loading image formats that can't be reliably identified by looking at the data, or if the user manually forces a specific type. The list of supported image formats depends on what image loaders are installed, but typically "png", "jpeg", "gif", "tiff" and "xpm" are among the supported formats. To obtain the full list of supported image formats, call `PixbufFormat::get_name` on each of the `PixbufFormat` structs returned by `Pixbuf::get_formats`. ## `image_type` name of the image format to be loaded with the image # Returns A newly-created pixbuf loader. Informs a pixbuf loader that no further writes with `PixbufLoaderExt::write` will occur, so that it can free its internal loading structures. Also, tries to parse any data that hasn't yet been parsed; if the remaining data is partial or corrupt, an error will be returned. If `false` is returned, `error` will be set to an error from the `GDK_PIXBUF_ERROR` or `G_FILE_ERROR` domains. If you're just cancelling a load rather than expecting it to be finished, passing `None` for `error` to ignore it is reasonable. Remember that this does not unref the loader, so if you plan not to use it anymore, please `gobject::Object::unref` it. # Returns `true` if all image data written so far was successfully passed out via the update_area signal Queries the `PixbufAnimation` that a pixbuf loader is currently creating. In general it only makes sense to call this function after the "area-prepared" signal has been emitted by the loader. If the loader doesn't have enough bytes yet (hasn't emitted the "area-prepared" signal) this function will return `None`. # Returns The `PixbufAnimation` that the loader is loading, or `None` if not enough data has been read to determine the information. Obtains the available information about the format of the currently loading image file. # Returns A `PixbufFormat` or `None`. The return value is owned by `Pixbuf` and should not be freed. Queries the `Pixbuf` that a pixbuf loader is currently creating. In general it only makes sense to call this function after the "area-prepared" signal has been emitted by the loader; this means that enough data has been read to know the size of the image that will be allocated. If the loader has not received enough data via `PixbufLoaderExt::write`, then this function returns `None`. The returned pixbuf will be the same in all future calls to the loader, so simply calling `gobject::Object::ref` should be sufficient to continue using it. Additionally, if the loader is an animation, it will return the "static image" of the animation (see `PixbufAnimationExt::get_static_image`). # Returns The `Pixbuf` that the loader is creating, or `None` if not enough data has been read to determine how to create the image buffer. Causes the image to be scaled while it is loaded. The desired image size can be determined relative to the original size of the image by calling `PixbufLoaderExt::set_size` from a signal handler for the ::size-prepared signal. Attempts to set the desired image size are ignored after the emission of the ::size-prepared signal. ## `width` The desired width of the image being loaded. ## `height` The desired height of the image being loaded. This will cause a pixbuf loader to parse the next `count` bytes of an image. It will return `true` if the data was loaded successfully, and `false` if an error occurred. In the latter case, the loader will be closed, and will not accept further writes. If `false` is returned, `error` will be set to an error from the `GDK_PIXBUF_ERROR` or `G_FILE_ERROR` domains. ## `buf` Pointer to image data. ## `count` Length of the `buf` buffer in bytes. # Returns `true` if the write was successful, or `false` if the loader cannot parse the buffer. This will cause a pixbuf loader to parse a buffer inside a `glib::Bytes` for an image. It will return `true` if the data was loaded successfully, and `false` if an error occurred. In the latter case, the loader will be closed, and will not accept further writes. If `false` is returned, `error` will be set to an error from the `GDK_PIXBUF_ERROR` or `G_FILE_ERROR` domains. See also: `PixbufLoaderExt::write` ## `buffer` The image data as a `glib::Bytes` # Returns `true` if the write was successful, or `false` if the loader cannot parse the buffer. This signal is emitted when the pixbuf loader has allocated the pixbuf in the desired size. After this signal is emitted, applications can call `PixbufLoaderExt::get_pixbuf` to fetch the partially-loaded pixbuf. This signal is emitted when a significant area of the image being loaded has been updated. Normally it means that a complete scanline has been read in, but it could be a different area as well. Applications can use this signal to know when to repaint areas of an image that is being loaded. ## `x` X offset of upper-left corner of the updated area. ## `y` Y offset of upper-left corner of the updated area. ## `width` Width of updated area. ## `height` Height of updated area. This signal is emitted when `PixbufLoaderExt::close` is called. It can be used by different parts of an application to receive notification when an image loader is closed by the code that drives it. This signal is emitted when the pixbuf loader has been fed the initial amount of data that is required to figure out the size of the image that it will create. Applications can call `PixbufLoaderExt::set_size` in response to this signal to set the desired size to which the image should be scaled. ## `width` the original width of the image ## `height` the original height of the image The possible rotations which can be passed to `Pixbuf::rotate_simple`. To make them easier to use, their numerical values are the actual degrees. No rotation. Rotate by 90 degrees. Rotate by 180 degrees. Rotate by 270 degrees. An opaque struct representing a simple animation. # Implements [`PixbufAnimationExt`](trait.PixbufAnimationExt.html) Creates a new, empty animation. ## `width` the width of the animation ## `height` the height of the animation ## `rate` the speed of the animation, in frames per second # Returns a newly allocated `PixbufSimpleAnim` Adds a new frame to `self`. The `pixbuf` must have the dimensions specified when the animation was constructed. ## `pixbuf` the pixbuf to add Gets whether `self` should loop indefinitely when it reaches the end. # Returns `true` if the animation loops forever, `false` otherwise Sets whether `self` should loop indefinitely when it reaches the end. ## `loop_` whether to loop the animation Whether the animation should loop when it reaches the end. Whether the animation should loop when it reaches the end.