public UnhandledImageFormatException( TextureNativeSectionData.CompressionMode compression,
TextureNativeSectionData.RasterFormat format )
: base("Unhandled image format encountered: " +
( compression != TextureNativeSectionData.CompressionMode.None ?
compression.ToString() + "-" : "" ) + format.ToString())
{
}
public Texture2D( TextureNativeSectionData tex )
: base(TextureTarget.Texture2D)
{
Width = tex.Width;
Height = tex.Height;
WrapModeU = FindWrapMode( tex.WrapU );
WrapModeV = FindWrapMode( tex.WrapV );
InternalFormat = FindInternalFormat( tex.Compression, tex.Format );
ExternalFormat = FindExternalFormat( tex.Compression, tex.Format );
Compressed = tex.Compression != TextureNativeSectionData.CompressionMode.None;
Alpha = tex.Alpha;
MinFilter = FindMinFilter( tex.FilterFlags );
MipMapCount = 1; // tex.MipMapCount;
ContainsMipMaps = ( tex.Format & TextureNativeSectionData.RasterFormat.ExtMipMap ) != 0;
GenerateMipMaps = true; // ( tex.Format & TextureNativeSectionData.RasterFormat.ExtAutoMipMap ) != 0;
ImageLevelSizes = new int[ MipMapCount ];
for ( int i = 0; i < MipMapCount; ++i )
ImageLevelSizes[ i ] = FindImageDataSize( Width >> i, Height >> i, tex.Compression, tex.Format );
ImageLevelData = new byte[ MipMapCount ][];
for ( int i = 0; i < MipMapCount; ++i )
ImageLevelData[ i ] = tex.ImageLevelData[ i ];
}
private static TextureWrapMode FindWrapMode( TextureNativeSectionData.WrapMode mode )
{
switch ( mode )
{
case TextureNativeSectionData.WrapMode.Wrap:
return TextureWrapMode.Repeat;
case TextureNativeSectionData.WrapMode.Mirror:
return TextureWrapMode.MirroredRepeat;
case TextureNativeSectionData.WrapMode.Clamp:
return TextureWrapMode.Clamp;
default:
return TextureWrapMode.Repeat;
}
}
private static TextureMinFilter FindMinFilter( TextureNativeSectionData.Filter filter )
{
switch ( filter )
{
case TextureNativeSectionData.Filter.Nearest:
return TextureMinFilter.Nearest;
case TextureNativeSectionData.Filter.MipNearest:
return TextureMinFilter.NearestMipmapNearest;
case TextureNativeSectionData.Filter.MipLinear:
return TextureMinFilter.NearestMipmapLinear;
case TextureNativeSectionData.Filter.LinearMipNearest:
return TextureMinFilter.LinearMipmapNearest;
case TextureNativeSectionData.Filter.LinearMipLinear:
return TextureMinFilter.LinearMipmapLinear;
default:
return TextureMinFilter.Linear;
}
}
private static PixelInternalFormat FindInternalFormat(
TextureNativeSectionData.CompressionMode compression,
TextureNativeSectionData.RasterFormat format )
{
switch ( (TextureNativeSectionData.RasterFormat) ( (int) format & 0x0fff ) )
{
case TextureNativeSectionData.RasterFormat.R5G6B5:
if ( compression == TextureNativeSectionData.CompressionMode.DXT1 )
return PixelInternalFormat.CompressedRgbS3tcDxt1Ext;
goto default;
case TextureNativeSectionData.RasterFormat.A1R5G5B5:
if ( compression == TextureNativeSectionData.CompressionMode.DXT1 )
return PixelInternalFormat.CompressedRgbaS3tcDxt1Ext;
goto default;
case TextureNativeSectionData.RasterFormat.B8G8R8:
if ( compression == TextureNativeSectionData.CompressionMode.None )
return PixelInternalFormat.Rgba;
goto default;
case TextureNativeSectionData.RasterFormat.B8G8R8A8:
if ( compression == TextureNativeSectionData.CompressionMode.None )
return PixelInternalFormat.Rgba;
goto default;
case TextureNativeSectionData.RasterFormat.R4G4B4A4:
if ( compression == TextureNativeSectionData.CompressionMode.DXT3 )
return PixelInternalFormat.CompressedRgbaS3tcDxt3Ext;
goto default;
default:
throw new UnhandledImageFormatException( compression, format );
}
}
private static int FindImageDataSize( int width, int height,
TextureNativeSectionData.CompressionMode compression,
TextureNativeSectionData.RasterFormat format )
{
switch ( (TextureNativeSectionData.RasterFormat) ( (int) format & 0x0fff ) )
{
case TextureNativeSectionData.RasterFormat.R5G6B5:
if ( compression == TextureNativeSectionData.CompressionMode.DXT1 )
return ( width * height ) >> 1;
goto default;
case TextureNativeSectionData.RasterFormat.A1R5G5B5:
if ( compression == TextureNativeSectionData.CompressionMode.DXT1 )
return ( width * height ) >> 1;
goto default;
case TextureNativeSectionData.RasterFormat.B8G8R8:
if ( compression == TextureNativeSectionData.CompressionMode.None )
return ( width * height ) << 2;
goto default;
case TextureNativeSectionData.RasterFormat.B8G8R8A8:
if ( compression == TextureNativeSectionData.CompressionMode.None )
return ( width * height ) << 2;
goto default;
case TextureNativeSectionData.RasterFormat.R4G4B4A4:
if ( compression == TextureNativeSectionData.CompressionMode.DXT3 )
return ( width * height );
goto default;
default:
throw new UnhandledImageFormatException( compression, format );
}
}
private static PixelFormat FindExternalFormat(
TextureNativeSectionData.CompressionMode compression,
TextureNativeSectionData.RasterFormat format )
{
if ( compression != TextureNativeSectionData.CompressionMode.None )
return PixelFormat.Alpha;
switch ( (TextureNativeSectionData.RasterFormat) ( (int) format & 0x0fff ) )
{
case TextureNativeSectionData.RasterFormat.B8G8R8:
return PixelFormat.Bgra;
case TextureNativeSectionData.RasterFormat.B8G8R8A8:
return PixelFormat.Bgra;
default:
throw new UnhandledImageFormatException( compression, format );
}
}