Function GetType

common/dds.cpp:225–262

Get supported type. We currently support 10 different types.

// Get supported type. We currently support 10 different types.
static DDSType GetType( const DDSHeader & header )
{
    if( header.pf.flags & DDPF_RGB ) {
        if( header.pf.flags & DDPF_ALPHAPIXELS ) {
            switch( header.pf.bitcount ) {
            case 16:
                return (header.pf.amask == 0x8000) ? DDS_A1R5G5B5 : DDS_A4R4G4B4;
            case 32:
                return DDS_A8R8G8B8;
            }
        } else {
            switch( header.pf.bitcount ) {
            case 16:
                return DDS_R5G6B5;
            case 24:
                return DDS_R8G8B8;
            }
        }
    } else if( header.pf.flags & DDPF_FOURCC ) {
        switch( header.pf.fourcc ) {
        case FOURCC_DXT1:
            return DDS_DXT1;
        case FOURCC_DXT2:
            return DDS_DXT2;
        case FOURCC_DXT3:
            return DDS_DXT3;
        case FOURCC_DXT4:
            return DDS_DXT4;
        case FOURCC_DXT5:
            return DDS_DXT5;
        case FOURCC_RXGB:
            return DDS_RXGB;
        case FOURCC_ATI2:
            return DDS_ATI2;
        }
    }
    return DDS_UNKNOWN;
}

static bool HasAlpha( const DDSHeader & header )
{