J2K-Codec : JPEG2000 decoder help

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J2K_GetResolutions

Use this function to get the number of available resolution levels in the J2K image.

int J2K_GetResolutions(void *image, int *resolutions);

Parameters

image

A pointer, obtained from J2K_Open().

resolutions

Pointer to a variable, where the number of resolutions will be placed.

Return value

Returns J2KERR_SUCCESS or an error code if the function has failed. See the list of error codes here.

Example

int resolutions=0, rWidth, rHeight;

int j2k_err = J2K_GetResolutions(image, &resolutions;);
if(j2k_err != J2KERR_SUCCESS) printf("\n J2K-Codec error: %s.", J2K_getErrorStr(j2k_err));

printf("\n %u resolution(s) available.\n", resolutions);

for(int i=0; i<resolutions; i++)
{
J2K_GetResolutionDimensions(image, i, &rWidth;, &rHeight;);
printf(" - Resolution %u: %ux%u\n", i, rWidth, rHeight);
}