//Decompress byte array into aBitmap with help of width, length and bitdepth
public static AccessibleBitmap Decompress(byte[] source, int width, int height, int pixelBytes)
{
//Create a BitStream from the input bytes becouse the decompress functions need this as input
BitStreamFIFO bitStream = new BitStreamFIFO(source);
//Create an empty bitmap with the correct dimensions, where the decompressed pixels will be written to
AccessibleBitmap aBitmap = new AccessibleBitmap(width, height, pixelBytes);
//Decompress the BitStream to a queue of integers for the lengths
Queue <int> pixels = new Queue <int>(VaryingIntArrayCompressor.Decompress(ref bitStream));
//Decompress the BitStream to a queue of integers for the pixel values
Queue <int> runs = new Queue <int>(VaryingIntArrayCompressor.Decompress(ref bitStream));
//Initialize
int pixelsToGo = runs.Dequeue() + 1; //The amount of pixels that should be written before the next run starts
byte[] currentPixel = new byte[pixelBytes]; //The pixel value of the current run: initialize with the correct amount of channels
//Loop trough all channels in the pixel of the current length
for (int i = 0; i < pixelBytes; i++)
{
//Take a byte from the queue of pixel values to put in the current channel
currentPixel[i] = (byte)pixels.Dequeue();
}
//Loop trough all lines of pixels
for (int y = 0; y < height; y++)
{
//Loop trough all pixels in this line
for (int x = 0; x < width; x++)
{
//Set the bit of the current pixel to the value of the current run
aBitmap.SetPixel(x, y, currentPixel);
//Decrease the length of the current run
pixelsToGo--;
//If the end of the run has been reached
if (pixelsToGo == 0 && (x * y != (height - 1) * (width - 1)))
{
//Read the new run length from the BitStream
pixelsToGo = runs.Dequeue() + 1;
//Loop trough all channels in the pixel of the current length
for (int i = 0; i < pixelBytes; i++)
{
//Take a byte from the queue of pixel values to put in the current channel
currentPixel[i] = (byte)pixels.Dequeue();
}
}
}
}
//Return the image as aBitmap
return(aBitmap);
}
public static AccessibleBitmap Decompress(byte[] source, int width, int height, int pixelBytes)
{
BitStreamFIFO bs = new BitStreamFIFO(source); // Convert the image into a bitstream
bool verticallyCompressed = bs.ReadBool(); // Store if image was vertically compressed or not
int maxBitCount = bs.ReadByte(); // Get the highest bitcount value
AccessibleBitmap bmp = new AccessibleBitmap(width, height, pixelBytes); // Create new bitmap to write all pixels to
// Ints to keep track of coords
int x = 0;
int y = 0;
// Loop while there are still bits to read
while (bs.Length > maxBitCount)
{
int counterValue = bs.ReadInt(maxBitCount); // Get the counter value of the next pixel value
byte[] pixel = bs.ReadByteArray(pixelBytes); // Get the pixel value
for (int i = 0; i < counterValue; i++)
{
bmp.SetPixel(x, y, pixel);
if (verticallyCompressed)
{
y++;
if (y >= height)
{
x++;
y = 0;
}
}else
{
x++;
if (x >= width)
{
y++;
x = 0;
}
}
}
}
// Return the bitmap
return bmp;
}