Function LoadCubeMap

common/dds.cpp:882–948

Load unwrapped cube map.

// Load unwrapped cube map.
static bool LoadCubeMap( QDataStream & s, const DDSHeader & header, QImage & img )
{
    // Create dst image.
#if CUBE_LAYOUT == HORIZONTAL
    img = QImage( 4 * header.width, 3 * header.height, QImage::Format_RGB32 );
#elif CUBE_LAYOUT == VERTICAL
    img = QImage( 3 * header.width, 4 * header.height, QImage::Format_RGB32 );
#endif

    DDSType type = GetType( header );

    // Enable alpha buffer for transparent or DDS images.
    if( HasAlpha( header ) || type >= DDS_DXT1 ) {
        img = img.convertToFormat( QImage::Format_ARGB32 );
    }

    // Select texture loader.
    TextureLoader loader = GetTextureLoader( type );
    if( loader == NULL ) {
        return false;
    }

    // Clear background.
    img.fill( 0 );

    // Create face image.
    QImage face(header.width, header.height, QImage::Format_RGB32);

    int offset = s.device()->pos();
    int size = FaceOffset( header );

    for( int i = 0; i < 6; i++ ) {

        if( !(header.caps.caps2 & face_flags[i]) ) {
            // Skip face.
            continue;
        }

        // Seek device.
        s.device()->seek( offset );
        offset += size;

        // Load face from stream.
        if( !loader( s, header, face ) ) {
            return false;
        }

#if CUBE_LAYOUT == VERTICAL
        if( i == 5 ) {
            face = face.mirror(true, true);
        }
#endif

        // Compute face offsets.
        int offset_x = face_offset[i][0] * header.width;
        int offset_y = face_offset[i][1] * header.height;

        // Copy face on the image.