public override Media.PixelFormat GetNativeFormat(Graphics.TextureType ttype, Media.PixelFormat format, Graphics.TextureUsage usage)
{
var caps = Root.Instance.RenderSystem.Capabilities;
//Check compressed texture support
//if a compressed formt not supported, rever to PixelFormat.A8R8G8B8
if (PixelUtil.IsCompressed(format) && !caps.HasCapability(Graphics.Capabilities.TextureCompressionDXT) && !caps.HasCapability(Graphics.Capabilities.TextureCompressionPVRTC))
{
return(PixelFormat.A8R8G8B8);
}
//if floating point texture not supported, rever to PixelFormat.A8R8G8B8
if (PixelUtil.IsFloatingPoint(format) && !caps.HasCapability(Graphics.Capabilities.TextureFloat))
{
return(PixelFormat.A8R8G8B8);
}
//Check if this is a valid rendertarget format
if ((usage & Graphics.TextureUsage.RenderTarget) == Graphics.TextureUsage.RenderTarget)
{
//Get closest supported alternative
//if format is supported it's returned
return(GLES2RTTManager.Instance.GetSupportedAlternative(format));
}
//Supported
return(format);
}
public override bool IsHardwareFilteringSupported(Graphics.TextureType ttype, Media.PixelFormat format, Graphics.TextureUsage usage, bool preciseFormatOnly)
{
if (format == PixelFormat.Unknown)
{
return(false);
}
//Check native format
PixelFormat nativeFormat = this.GetNativeFormat(ttype, format, usage);
if (preciseFormatOnly && format != nativeFormat)
{
return(false);
}
//Assume non-floaitng point is supported always
if (!PixelUtil.IsFloatingPoint(nativeFormat))
{
return(true);
}
return(false);
}