FreeImageQt supports the following functions. Note that in average use you only need FIQT_Register to use this library.

bool FIQT_Register(bool new_formats_only = false);

Registers the FreeImage load functions in Qt and returns true if successful. If new_formats_only is true, only the bitmap formats not supported by Qt are registered. Else all bitmap formats supported by FreeImage are registered. You have to call this function to take advantage of FreeImage.

void FIQT_Unregister();

Removes all binding between FreeImage and Qt. You shouldn't normally have to call this function. It is called automatically on program exit.

Bool FIQT_IsLoaded();

Returns true if FreeImage was successfully registered into Qt's bitmap functionality handler, false otherwise.

const char *FIQT_GetVersion();

Returns the version string of the library.

const char *FIQT_GetVersion();

Returns a short copyright message you can include in your program.

int FIQT_GetFIFCount();

Returns the number of supported bitmap formats.

FREE_IMAGE_FORMAT FIQT_GetFIFFromFormat(const char *format);

Returns the FreeImage format ID for the given format string.

const char *FIQT_GetFormatFromFIF(FREE_IMAGE_FORMAT fif);

Returns a format string for the given FreeImage Format ID.

const char *FIQT_GetFIFExtensionList(FREE_IMAGE_FORMAT fif);

Returns a list of possible file extension for the given FreeImage Format ID. The extension list is a string containing one or more comma separated file extensions.

const char *FIQT_GetFIFDescription(FREE_IMAGE_FORMAT fif);

Returns a descriptive string for the given FreeImage Format ID.

FREE_IMAGE_FORMAT FIQT_GetFIFFromFilename(const char *filename);

Tries to identify a bitmap type by looking at the filename or a file extension. FreeImage_GetFIFFromFilename returns a valid FreeImage Format ID on success and FIF_UNKNOWN on failure.

BOOL FIQT_FIFSupportsReading(FREE_IMAGE_FORMAT fif);

Returns true if the plugin belonging to this FreeImage Format ID supports reading, false otherwise.

BOOL FIQT_FIFSupportsWriting(FREE_IMAGE_FORMAT fif);

Returns true if the plugin belonging to this FreeImage Format ID supports writing, false otherwise.

const char *FIQT_GetFileTypeFromFormat(FREE_IMAGE_FORMAT fif);

This function is deprecated. FIQT_GetFIFFromFormat has replaced its functionality.

const char *FIQT_GetFormatFromExtension(const char *extension);

Returns a FreeImage Format string for the given file extension.