Function readHeaderMemWebP

deps/leptonica/src/webpio.c:211–236

! * \brief readHeaderMemWebP() * * \param[in] data * \param[in] size 100 bytes is sufficient * \param[out] pw width * \param[out] ph height * \param[out] pspp spp (3 or 4) * \return 0 if OK, 1 on error */

 * \return  0 if OK, 1 on error
 */
l_int32
readHeaderMemWebP(const l_uint8  *data,
                  size_t          size,
                  l_int32        *pw,
                  l_int32        *ph,
                  l_int32        *pspp)
{
WebPBitstreamFeatures  features;

    PROCNAME("readHeaderWebP");

    if (pw) *pw = 0;
    if (ph) *ph = 0;
    if (pspp) *pspp = 0;
    if (!data)
        return ERROR_INT("data not defined", procName, 1);
    if (!pw || !ph || !pspp)
        return ERROR_INT("input ptr(s) not defined", procName, 1);

    if (WebPGetFeatures(data, (l_int32)size, &features))
        return ERROR_INT("invalid WebP file", procName, 1);
    *pw = features.width;
    *ph = features.height;
    *pspp = (features.has_alpha) ? 4 : 3;
    return 0;
}


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