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J2K_Image::decode Use this function to decode a J2K image, opened by J2K_Image::open() function. int decode(char *options=0); Parameters options Options string. See the list of valid options here.
Return value Returns J2KERR_SUCCESS or an error code if the function has failed. See the list of error codes here. Notes 1. Before using this function you must call J2K_Image::open(). 2. By default the buffer member of the J2K_Image class is NULL so the buffer will be allocated inside this function. You may override this behavior by setting the buffer member to point to your own buffer before the call. Note, that in this case you also need to set size and pitch members and add "bpp" option into the options string to specify the bytes-per-pixel value of your buffer. 3. If the buffer is allocated inside, then by default it will have 1 byte per pixel for grayscale images and 4 bytes per pixel for color images. You can change the default BPP using the options string. 4. You must not free the buffer if it was allocated inside. It will be automatically destroyed in J2K_Image::close() function. 5. If you have allocated the buffer yourself, then you must free it as well. For calculating the buffer size see "Calculating buffer size" section. Example
J2K_Image image; J2K_Image::open() J2K_Image class |
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