public static string ToFileExtension(this DirectXTexFileType type)
{
switch (type)
{
case DirectXTexFileType.DDS:
return(".dds");
case DirectXTexFileType.HDR:
return(".hdr");
case DirectXTexFileType.TGA:
return(".tga");
case DirectXTexFileType.WIC:
return(DefaultFileExtensionForWIC);
default:
return("");
}
}
public static TexMetadata GetMetadataFromFile(string file
, DirectXTexFileType fileType = DirectXTexFileType.Unknown
, uint flags = 0)
{
Contract.Requires(!string.IsNullOrEmpty(file));
if (!File.Exists(file))
{
throw new FileNotFoundException(file);
}
if (fileType == DirectXTexFileType.Unknown)
{
fileType = FileTypeFromFileExtension(file);
}
if (fileType == DirectXTexFileType.Unknown)
{
throw new NotSupportedException(file);
}
var result = TexMetadata.Empty;
if (DirectXTexDLL.EntryPointsNotFound)
{
return(result);
}
try
{
var hresult = DirectXTexDLL.DirectXTex_GetMetadataFromFile(
fileType, out result, file, flags);
DirectXTexDLL.ThrowIfFailed(hresult);
}
catch (EntryPointNotFoundException ex)
{
DirectXTexDLL.HandleEntryPointNotFound(ex);
}
return(result);
}
public static TexMetadata GetMetadataFromMemory(
byte[] buffer, int startIndex, int length
, DirectXTexFileType fileType
, uint flags = 0)
{
Contract.Requires <ArgumentNullException>(buffer != null);
Contract.Requires <ArgumentOutOfRangeException>(startIndex >= 0);
Contract.Requires <ArgumentOutOfRangeException>(length >= 0);
Contract.Requires <ArgumentOutOfRangeException>((startIndex + length) <= buffer.Length);
var result = TexMetadata.Empty;
if (DirectXTexDLL.EntryPointsNotFound)
{
return(result);
}
var bufferHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
try
{
var buf = bufferHandle.AddrOfPinnedObject();
buf += startIndex;
var hresult = DirectXTexDLL.DirectXTex_GetMetadataFromMemory(
fileType, out result, buf, (uint)length, flags);
DirectXTexDLL.ThrowIfFailed(hresult);
}
catch (EntryPointNotFoundException ex)
{
DirectXTexDLL.HandleEntryPointNotFound(ex);
}
finally
{
bufferHandle.Free();
}
return(result);
}
public static extern int DirectXTex_GetMetadataFromMemory(
DirectXTexFileType fileType,
out TexMetadata metadata,
IntPtr source,
uint size,
uint flags);
public static extern int DirectXTex_GetMetadataFromFile(
DirectXTexFileType fileType,
out TexMetadata metadata,
string file,
uint flags);
