public UnhandledImageFormatException(TextureNativeSectionData.CompressionMode compression,
TextureNativeSectionData.RasterFormat format)
: base("Unhandled image format encountered: " +
(compression != TextureNativeSectionData.CompressionMode.None ?
compression.ToString() + "-" : "") + format.ToString())
{
}
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);
}
}