Signals

Type for the callback on the (unwrapped) C side.

A function of this type is responsible for freeing the pixel array of a pixbuf.

The pixbufNewFromData 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.

A function of this type is responsible for freeing the pixel array of a pixbuf.

The pixbufNewFromData 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.

A simple wrapper that ignores the closure arguments.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufDestroyNotify.

A convenience synonym for Nothing :: Maybe PixbufDestroyNotify.

A convenience synonym for Nothing :: Maybe PixbufDestroyNotify_WithClosures.

Wrap a PixbufDestroyNotify into a C_PixbufDestroyNotify.

Type for the callback on the (unwrapped) C side.

Defines the type of the function used to fill a PixbufFormat structure with information about a module.

Since: 2.2

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModuleFillInfoFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleFillInfoFunc.

Wrap a PixbufModuleFillInfoFunc into a C_PixbufModuleFillInfoFunc.

Type for the callback on the (unwrapped) C side.

Defines the type of the function used to set the vtable of a PixbufModule when it is loaded.

Since: 2.2

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModuleFillVtableFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleFillVtableFunc.

Wrap a PixbufModuleFillVtableFunc into a C_PixbufModuleFillVtableFunc.

Type for the callback on the (unwrapped) C side.

Incrementally loads a buffer into the image data.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Generate a function pointer callable from C code, from a C_PixbufModuleIncrementLoadFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleIncrementLoadFunc.

Type for the callback on the (unwrapped) C side.

Loads a file from a standard C file stream into a new GdkPixbufAnimation.

In case of error, this function should return NULL and set the error argument.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Generate a function pointer callable from C code, from a C_PixbufModuleLoadAnimationFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleLoadAnimationFunc.

Type for the callback on the (unwrapped) C side.

Loads a file from a standard C file stream into a new GdkPixbuf.

In case of error, this function should return NULL and set the error argument.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Generate a function pointer callable from C code, from a C_PixbufModuleLoadFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleLoadFunc.

Type for the callback on the (unwrapped) C side.

Loads XPM data into a new GdkPixbuf.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModuleLoadXpmDataFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleLoadXpmDataFunc.

Wrap a PixbufModuleLoadXpmDataFunc into a C_PixbufModuleLoadXpmDataFunc.

Type for the callback on the (unwrapped) C side.

Defines the type of the function that gets called once the initial setup of pixbuf is done.

PixbufLoader uses a function of this type to emit the "<link linkend="GdkPixbufLoader-area-prepared">area_prepared</link>" signal.

Since: 2.2

Defines the type of the function that gets called once the initial setup of pixbuf is done.

PixbufLoader uses a function of this type to emit the "<link linkend="GdkPixbufLoader-area-prepared">area_prepared</link>" signal.

Since: 2.2

A simple wrapper that ignores the closure arguments.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModulePreparedFunc.

A convenience synonym for Nothing :: Maybe PixbufModulePreparedFunc.

A convenience synonym for Nothing :: Maybe PixbufModulePreparedFunc_WithClosures.

Wrap a PixbufModulePreparedFunc into a C_PixbufModulePreparedFunc.

Type for the callback on the (unwrapped) C side.

Saves a GdkPixbuf into a standard C file stream.

The optional param_keys and param_values arrays contain the keys and values (in the same order) for attributes to be saved alongside the image data.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Generate a function pointer callable from C code, from a C_PixbufModuleSaveFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleSaveFunc.

Type for the callback on the (unwrapped) C side.

Checks whether the given option_key is supported when saving.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModuleSaveOptionSupportedFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleSaveOptionSupportedFunc.

Wrap a PixbufModuleSaveOptionSupportedFunc into a C_PixbufModuleSaveOptionSupportedFunc.

Type for the callback on the (unwrapped) C side.

Defines the type of the function that gets called once the size of the loaded image is known.

The function is expected to set width and height to the desired size to which the image should be scaled. If a module has no efficient way to achieve the desired scaling during the loading of the image, it may either ignore the size request, or only approximate it - gdk-pixbuf will then perform the required scaling on the completely loaded image.

If the function sets width or height to zero, the module should interpret this as a hint that it will be closed soon and shouldn't allocate further resources. This convention is used to implement pixbufGetFileInfo efficiently.

Since: 2.2

Defines the type of the function that gets called once the size of the loaded image is known.

The function is expected to set width and height to the desired size to which the image should be scaled. If a module has no efficient way to achieve the desired scaling during the loading of the image, it may either ignore the size request, or only approximate it - gdk-pixbuf will then perform the required scaling on the completely loaded image.

If the function sets width or height to zero, the module should interpret this as a hint that it will be closed soon and shouldn't allocate further resources. This convention is used to implement pixbufGetFileInfo efficiently.

Since: 2.2

A simple wrapper that ignores the closure arguments.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModuleSizeFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleSizeFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleSizeFunc_WithClosures.

Wrap a PixbufModuleSizeFunc into a C_PixbufModuleSizeFunc.

Type for the callback on the (unwrapped) C side.

Finalizes the image loading state.

This function is called on success and error states.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Generate a function pointer callable from C code, from a C_PixbufModuleStopLoadFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleStopLoadFunc.

Type for the callback on the (unwrapped) C side.

Defines the type of the function that gets called every time a region of pixbuf is updated.

PixbufLoader uses a function of this type to emit the "<link linkend="GdkPixbufLoader-area-updated">area_updated</link>" signal.

Since: 2.2

Defines the type of the function that gets called every time a region of pixbuf is updated.

PixbufLoader uses a function of this type to emit the "<link linkend="GdkPixbufLoader-area-updated">area_updated</link>" signal.

Since: 2.2

A simple wrapper that ignores the closure arguments.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufModuleUpdatedFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleUpdatedFunc.

A convenience synonym for Nothing :: Maybe PixbufModuleUpdatedFunc_WithClosures.

Wrap a PixbufModuleUpdatedFunc into a C_PixbufModuleUpdatedFunc.

Type for the callback on the (unwrapped) C side.

Save functions used by 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.

Since: 2.4

Save functions used by 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.

Since: 2.4

A simple wrapper that ignores the closure arguments.

Given a pointer to a foreign C function, wrap it into a function callable from Haskell.

Wrap the callback into a GClosure.

Generate a function pointer callable from C code, from a C_PixbufSaveFunc.

A convenience synonym for Nothing :: Maybe PixbufSaveFunc.

A convenience synonym for Nothing :: Maybe PixbufSaveFunc_WithClosures.

Wrap a PixbufSaveFunc into a C_PixbufSaveFunc.