/// <summary>
/// Instantiates a <see cref="DDSImage"/> from the data of the specified DDS file.
/// </summary>
/// <param name="filePath">The file path of the DDS file to read.</param>
public static DDSImage CreateFromFile(string filePath)
{
using (var reader = new DDSFileReader(filePath))
{
return(reader.Read());
}
}
public void ReadingThrowsExceptionWhenMagicNumberIsInvalid()
{
var stream = new MemoryStream();
var writer = new BinaryWriter(stream);
writer.Write(DDSFile.MagicNumber + 1);
// Flush data and reset stream position for reader
writer.Flush();
stream.Position = 0;
var reader = new DDSFileReader(stream);
Assert.Throws <InvalidOperationException>(() => reader.Read());
reader.Dispose();
writer.Dispose();
}
public void ReadImageFromMemory()
{
int imageWidth = 4;
int imageHeight = 4;
var mainImage = new byte[8] {
1, 2, 3, 4, 5, 6, 7, 8
};
var stream = new MemoryStream();
var writer = new BinaryWriter(stream);
// Write the DDS "magic number"
writer.Write(DDSFile.MagicNumber);
// Write the header data structure directly to the buffer
var header = DDSFileWriter.CreateHeader(imageWidth, imageHeight, FourCC.BC1Unorm.Value);
var headerData = new byte[Marshal.SizeOf(typeof(DDSFileHeader))];
var handle = GCHandle.Alloc(headerData, GCHandleType.Pinned);
Marshal.StructureToPtr(header, handle.AddrOfPinnedObject(), true);
writer.Write(headerData);
// Write main image data
writer.Write(mainImage);
// Flush data and reset stream position for reader
writer.Flush();
stream.Position = 0;
// Act against test stream
var reader = new DDSFileReader(stream);
var ddsImage = reader.Read();
Assert.AreEqual(imageWidth, ddsImage.Width);
Assert.AreEqual(imageHeight, ddsImage.Height);
CollectionAssert.AreEqual(mainImage, ddsImage.GetBuffer());
reader.Dispose();
writer.Dispose();
}
