how to create Bitmap from Array?

Hello @mc ,

Thanks for your question.

Since your array is laid out row by row, you just iterate through the array and map each index to an (x, y) pixel position.

You can refer to following example:

From Color[]:

Color[] colors = new Color[48 * 12];

var bmp = new Bitmap(48, 12);
for (int i = 0; i < colors.Length; i++)
    bmp.SetPixel(i % 48, i / 48, colors[i]);

pictureBox1.Image = bmp;

From int[] (ARGB packed):

int[] colors = new int[48 * 12];

var bmp = new Bitmap(48, 12);
for (int i = 0; i < colors.Length; i++)
    bmp.SetPixel(i % 48, i / 48, Color.FromArgb(colors[i]));

pictureBox1.Image = bmp;

I hope this addresses your question. If this response was helpful, please consider following the guidance to provide feedback.

In Windows Forms (.NET), create a Bitmap and set its pixels from the array.

For an int[] of ARGB values (length = width * height):

int width = 48;
int height = 12;
int[] colors = new int[width * height];
// fill colors[y * width + x] with ARGB values

var bmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);

for (int y = 0; y < height; y++)
{
    for (int x = 0; x < width; x++)
    {
        int argb = colors[y * width + x];
        bmp.SetPixel(x, y, Color.FromArgb(argb));
    }
}

For a Color[] (length = width * height):

int width = 48;
int height = 12;
Color[] colors = new Color[width * height];
// fill colors[y * width + x]

var bmp = new Bitmap(width, height);

for (int y = 0; y < height; y++)
{
    for (int x = 0; x < width; x++)
    {
        bmp.SetPixel(x, y, colors[y * width + x]);
    }
}

If performance is critical, use LockBits and copy the raw bytes instead of SetPixel, but the above is the simplest approach for a 48×12 image.

References:

• BitmapSource.Create Method
• Bitmap Creation
• Bitmap Storage