Bitmap Operations
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
namespace WiccanRede.Utils
{
static class BitmapOperations
{
/// <summary>
/// Metoda nacte pole barev z bitmapy
/// </summary>
/// <param name="bmp">Bitmapa, ze ktere se budou cist data</param>
/// <returns>Pole barev</returns>
public unsafe static Color[,] BitmapToColorArray(Bitmap bmp)
{
Color[,] img = new Color[bmp.Width, bmp.Height];
BitmapData data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
for (int y = 0; y < data.Height; y++)
{
// vypocte ukazatel na zacatek y-teho radku
int* retPos = (int*)((int)data.Scan0 + (y * data.Stride));
int x = 0;
while (x < data.Width)
{
// vyplni pixel nahodnou barvou
img[x, y] = Color.FromArgb(*retPos);
// posun na dalsi pixel
retPos++; x++;
}
}
bmp.UnlockBits(data);
return img;
}
/// <summary>
/// Metoda vytvori Bitmapu z pole barev
/// </summary>
/// <param name="pixels">Zadane pole barev</param>
/// <returns>Vytvorena bitmapa</returns>
public unsafe static Bitmap ColorArrayToBitmap(Color[,] pixels)
{
Bitmap bmp = new Bitmap(pixels.GetLength(0), pixels.GetLength(1));
BitmapData data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
for (int y = 0; y < data.Height; y++)
{
// vypocte ukazatel na zacatek y-teho radku
int* retPos = (int*)((int)data.Scan0 + (y * data.Stride));
int x = 0;
while (x < data.Width)
{
// vyplni pixel nahodnou barvou
*retPos = pixels[x, y].ToArgb();
// posun na dalsi pixel
retPos++; x++;
}
}
bmp.UnlockBits(data);
return bmp;
}
public static Color[,] Blur(Color[,] img)
{
Color[,] nMatrix = new Color[img.GetLength(0), img.GetLength(1)];
for (int i = 0; i < nMatrix.GetLength(0); i++)
{
for (int j = 0; j < nMatrix.GetLength(1); j++)
{
Color i1j1 = (j + 1 < img.GetLength(1) && (i + 1) < img.GetLength(0)) ? img[i + 1, j + 1] : Color.FromArgb(0, 0, 0);
Color ij1 = (j + 1 < img.GetLength(1)) ? img[i, j + 1] : Color.FromArgb(0, 0, 0);
Color i_1j1 = (j + 1 < img.GetLength(1) && (i - 1) > 0) ? img[i - 1, j + 1] : Color.FromArgb(0, 0, 0);
Color i1j = (i + 1 < img.GetLength(0)) ? img[i + 1, j] : Color.FromArgb(0, 0, 0);
Color ij = img[i, j];
Color i_1j = ((i - 1) > 0) ? img[i - 1, j] : Color.FromArgb(0, 0, 0);
Color i1j_1 = ((j - 1) > 0 && (i + 1) < img.GetLength(0)) ? img[i + 1, j - 1] : Color.FromArgb(0, 0, 0);
Color ij_1 = (j - 1 > 0) ? img[i, j - 1] : Color.FromArgb(0, 0, 0);
Color i_1j_1 = (j - 1 > 0 && (i - 1) > 0) ? img[i - 1, j - 1] : Color.FromArgb(0, 0, 0);
int blurR = i1j1.R + ij1.R + i_1j1.R + i1j.R + ij.R + i_1j.R + i1j_1.R + ij_1.R + i_1j_1.R;
int blurG = i1j1.G + ij1.G + i_1j1.G + i1j.G + ij.G + i_1j.G + i1j_1.G + ij_1.G + i_1j_1.G;
int blurB = i1j1.B + ij1.B + i_1j1.B + i1j.B + ij.B + i_1j.B + i1j_1.B + ij_1.B + i_1j_1.B;
blurR /= 9;
blurG /= 9;
blurB /= 9;
nMatrix[i, j] = Color.FromArgb(blurR, blurG, blurB);
}
}
return nMatrix;
}
}
}
Related examples in the same category
