protected void ConstructRawTexture(string id, BinaryReader br, int size)
{
if (_rawTextureCache.ContainsKey(id) == false)
{
byte[] data = br.ReadBytes(size);
NanoJPEG nanoJPEG = new NanoJPEG();
nanoJPEG.njDecode(data);
byte[] rawPixels = nanoJPEG.njGetImage();
if (rawPixels != null && rawPixels.Length > 0 && rawPixels.Length == nanoJPEG.njGetWidth() * nanoJPEG.njGetHeight() * 3)
{
RawTexture texture = new RawTexture();
texture.ImgData = rawPixels;
texture.Width = nanoJPEG.njGetWidth();
texture.Height = nanoJPEG.njGetHeight();
_rawTextureCache.Add(id, texture);
}
}
}
/// <summary>
/// Decodes the image from the specified stream and sets the data to image.
/// </summary>
/// <param name="Image">The image, where the data should be set to. Cannot be null (Nothing in Visual Basic).</param>
/// <param name="Stream">The stream, where the image should be decoded from. Cannot be null (Nothing in Visual Basic).</param>
public void Decode(ExtendedImage Image, Stream Stream)
{
// Initialize the input.
byte[] Input = Stream is MemoryStream ? ((MemoryStream)Stream).ToArray() : null;
// Initialize a new instance of the NanoJPEG class.
NanoJPEG NanoJPEG = new NanoJPEG();
// Check if the input is invalid.
if (Input == null)
{
// Initialize a new instance of the MemoryStream class.
using (MemoryStream MemoryStream = new MemoryStream()) {
// Initialize the buffer.
byte[] Buffer = new byte[16 * 1024];
// Initialize the number of bytes read.
int Read;
// Read bytes and check if reading was successful.
while ((Read = Stream.Read(Buffer, 0, Buffer.Length)) > 0)
{
// Write the read bytes.
MemoryStream.Write(Buffer, 0, Read);
}
// Set the input.
Input = MemoryStream.ToArray();
}
}
// Decode the image.
if (NanoJPEG.njDecode(Input) == nj_result_t.NJ_OK)
{
// Initialize the status indicating color.
bool IsColor = NanoJPEG.njIsColor();
// Initialize the RGB-formatted image..
byte[] Output = NanoJPEG.njGetImage();
// Initialzie the iterator.
int i = Output.Length - 3, Height = NanoJPEG.njGetHeight(), Width = NanoJPEG.njGetWidth();
// Initialize NanoJPEG to dispose of copies.
NanoJPEG.njInit();
// Check if the image has color.
if (IsColor)
{
// Resize the RGB-formatted image to accommendate RGBA-formatting.
Array.Resize(ref Output, Output.Length * 4 / 3);
// Iterate through each pixel in the RGB-formatting.
for (int j = Output.Length - 4; i >= 0; i -= 3, j -= 4)
{
// Change the pixel from RGB-formatting to RGBA-formatting.
Buffer.BlockCopy(Output, i, Output, j, 3);
// Set the alpha channel for the pixel.
Output[j + 3] = 0;
}
}
else
{
// Resize the Grayscale image to accommendate RGBA-formatting.
Array.Resize(ref Output, Output.Length * 4);
// Iterate through each pixel in the RGB-formatting.
for (int j = Output.Length - 4; i >= 0; i -= 3, j -= 4)
{
// Change the pixel from Grayscale to RGBA-formatting.
Output[j] = Output[j + 1] = Output[j + 2] = Output[i];
// Set the alpha channel for the pixel.
Output[j + 3] = 0;
}
}
// Return the RGBA-formatted image.
Image.SetPixels(Width, Height, Output);
}
}
