News Overview Download Order F.A.Q. More info Support Links Welcome QuickStart ActiveX Control C++ Wrapper J2K_Image open easyDecode selectTiles getMetaData decode close •J2K_Frames open getFrames getFrame operators close API Reference General getVersion getLastError getErrorStr getLastErrorStr Unlock Open / Close Open Close Info GetInfo GetInfoEx GetResolutions GetResDimensions GetMetaData Decoding EasyDecode SelectTiles Decode Cancel Debug StartLogging StopLogging

J2K_Frames class It is usual practice for game developers to store animation frames as tiles in a single large image. For example, see the following picture: This class helps to handle such images and represent them as a collection of frames. To use it, you'll need to create a tiled JPEG2000 image (with or without alpha-channel), which holds each frame in a corresponding tile. J2K_Frames class will load such image and convert all tiles into frames. Each frame has the following format: Field Size Description Width 4 Width of the frame Height 4 Height of the frame isAlpha 4 Alpha presence flag (1 - alpha channel is present) Pixels ... Width × Height pixels (4 bytes each) See "f_Alpha" sample where this class is actually used. Members: errStr const char * Error description string. Will be set in case of an error. Methods: J2K_Frames::open() J2K_Frames::getFrames() J2K_Frames::getFrame() J2K_Frames operators J2K_Frames::close() Notes Don't forget to use tiled JPEG2000 images for this class to work. Simply combining all your frames into a single image is not enough. You must save it with tiles, equal in size to the frames.

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