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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_SelectTiles You need to use this function only if you want to decode a particular tile (or a tile range) from the image. int J2K_SelectTiles(void *image, int start_tile, int end_tile, int action); Parameters image A pointer, obtained from J2K_Open(). start_tile Start tile number of selection range. end_tile End tile number of selection range (inclusive). action Action to do: 1 - select, 0 - unselect (remove from processing).
Return value Returns J2KERR_SUCCESS or an error code if the function has failed. See the list of error codes here. Notes 1. By default (if this function is not used) all tiles are selected. 2. After you have selected some of the tiles, the following functions will use them as a base for their operation: J2K_GetResolutions() will return the number of resolution levels available in the selected tile-set.3. Tiles are numbered starting from 0 in the raster order (i.e. first - by X axis and then by Y). 4. If end_tile == -1 then the max tile number will be used instead. 5. If end_tile < start_tile they will be swapped. 6. If no tiles were selected then J2K_GetResolutions() and J2K_GetResolutionDimensions() will assume 1 resolution level available with the dimensions of the whole image, and no decoding will be done by J2K_Decode(). Example
void *image = J2K_Open("test.j2k"); J2K_Open() J2K_GetInfoEx() |
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