Can I create an Int24 (24-bit type) in C #?
The main task:
Format24bppRgb color++ ( color++ for each next area).
You have approached the task from the wrong side. You, apparently, are trying to make a 24-bit data type to arrange it in an array that will repeat the image in structure. But in C #, this is difficult to do.
Instead, you can make a separate class with an indexer that will look like an array from the outside - and inside it will itself correctly distribute the pixel colors by bytes:
public class BitmapAccessor { private byte[] scan0; // Или любое другое хранилище private int stride; // (3 * width + 3) / 4 * 4. Ну или можно взять это число из BitmapData.Stride // ... public Color this[int x, int y] { get { var index = 3 * x + stride * y; return Color.FromArgb(scan0[index], scan0[index+1], scan0[index+2]); // точный формат не помню, возможно аргументы надо поменять местами } set { var index = 3 * x + stride * y; scan0[index] = value.R; scan0[index+1] = value.G; scan0[index+2] = value.B; } } } 
It is not necessary to build a bike. Take the ready-made System.Drawing.Bitmap class, it allows you to work with pixels as you like, including choosing the depth from 4 to 48 bits, the format you specified, and a few more specific formats. More details in the documentation .
Filling, however, will have to implement independently, there is no finished one. But you can take advantage of vector capabilities if you feed the Bitmap into the Graphics constructor.
You can work with color using the System.Drawing.Color class and the FromArgb() and ToArgb , which enable you to get and set the color with the usual int . Details in the documentation here , here and here .
GetPixel() class's GetPixel() method, but by working with a copy decomposed into a uint 'new matrix. - Artyom Ionashunsafe block, you can simply get a pointer to the image matrix and work with it directly. Although I have not done this yet. - rdornUse only 24 bits of the 32-bit number.
Create a separate structure with three bytes or a separate class with an array of 3 bytes.
Source: https://ru.stackoverflow.com/questions/504579/
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byte. But why? I would simply use an array of bytes corresponding to the memory fill, and write procedures that read / write the value at the index. (By the way, do not forget about stride.) - VladDInt24, are you going to copy it into memory of the image byte-by-byte? (Because, due to the alignment, you most likely will not be able to blit it). Believe my experience will be slow. (However, try it.) - VladDuintmatrix viaBuffer.BlockCopyto work with it in 2D coordinates. But theoretically, I wonder how it, for example, can be decomposed into a matrix of 24 bits fromBitmapData.Scan0. - Artyom Ionash