/// <summary>
/// Converts the specified texture to another format.
/// </summary>
/// <param name="format">The desired texture format.</param>
/// <returns>
/// The texture using <paramref name="format" />. Does nothing (returns <c>this</c>) if texture
/// already has the desired format.
/// </returns>
/// <exception cref="NotSupportedException">
/// Texture conversion to the specified format is not supported.
/// </exception>
public Texture ConvertTo(DataFormat format)
{
var srcFormat = Description.Format;
var dstFormat = format;
if (srcFormat == dstFormat)
return this;
// ----- Direct conversion:
// srcFormat -> dstFormat
if (TextureHelper.CanConvert(srcFormat, dstFormat))
{
var description = Description;
description.Format = dstFormat;
var texture = new Texture(description);
#if SINGLE_THREADED
for (int i = 0; i < Images.Count; i++)
#else
Parallel.For(0, Images.Count, i =>
#endif
{
TextureHelper.Convert(Images[i], texture.Images[i]);
}
#if !SINGLE_THREADED
);
#endif
return texture;
}
// ----- Conversion using intermediate formats:
// srcFormat -> R32G32B32A32_FLOAT -> dstFormat
if (TextureHelper.CanConvert(srcFormat, DataFormat.R32G32B32A32_FLOAT)
&& TextureHelper.CanConvert(DataFormat.R32G32B32A32_FLOAT, dstFormat))
{
var texture = ConvertTo(DataFormat.R32G32B32A32_FLOAT);
return texture.ConvertTo(dstFormat);
}
// srcFormat -> R8G8B8A8_UNORM -> dstFormat
if (TextureHelper.CanConvert(srcFormat, DataFormat.R8G8B8A8_UNORM)
&& TextureHelper.CanConvert(DataFormat.R8G8B8A8_UNORM, dstFormat))
{
var texture = ConvertTo(DataFormat.R8G8B8A8_UNORM);
return texture.ConvertTo(dstFormat);
}
throw new NotSupportedException(string.Format("Texture format conversion from {0} to {1} is not supported.", srcFormat, dstFormat));
}
/// <summary>
/// Determines whether conversion to the specified texture format is supported.
/// </summary>
/// <param name="format">The desired texture format.</param>
/// <returns>
/// <see langword="true"/> if the conversion from the current format to <paramref name="format"/>
/// is supported; otherwise, <see langword="false"/>.
/// </returns>
public bool CanConvertTo(DataFormat format)
{
var srcFormat = Description.Format;
var dstFormat = format;
// srcFormat -> dstFormat
if (TextureHelper.CanConvert(srcFormat, dstFormat))
return true;
// srcFormat -> R32G32B32A32_FLOAT -> dstFormat
if (TextureHelper.CanConvert(srcFormat, DataFormat.R32G32B32A32_FLOAT)
&& TextureHelper.CanConvert(DataFormat.R32G32B32A32_FLOAT, dstFormat))
return true;
// srcFormat -> R8G8B8A8_UNORM -> dstFormat
if (TextureHelper.CanConvert(srcFormat, DataFormat.R8G8B8A8_UNORM)
&& TextureHelper.CanConvert(DataFormat.R8G8B8A8_UNORM, dstFormat))
return true;
return false;
}
