Function verifyCompressedTexture

src/textures/parsers/VerifyCompressedTexture.js:22–46

(data)

 * @return {boolean} Whether the compressed texture data is valid.
 */
var verifyCompressedTexture = function (data)
{
    // Check that mipmaps are power-of-two sized.
    // WebGL does not allow non-power-of-two textures for mip levels above 0.
    var mipmaps = data.mipmaps;
    for (var level = 1; level < mipmaps.length; level++)
    {
        var width = mipmaps[level].width;
        var height = mipmaps[level].height;
        if (!IsSizePowerOfTwo(width, height))
        {
            console.warn('Mip level ' + level + ' is not a power-of-two size: ' + width + 'x' + height);
            return false;
        }
    }

    // Check specific format requirements.
    var checker = formatCheckers[data.internalFormat];
    if (!checker)
    {
        console.warn('No format checker found for internal format ' + data.internalFormat + '. Assuming valid.');
        return true;
    }
    return checker(data);
};

/**
 * @ignore