1、
int
width = 50;
int
height = 50;
var
bitmap =
new
Bitmap(width, height, PixelFormat.Canonical);
for
(
int
y = 0; y < height; y++)
for
(
int
x = 0; x < width; x++)
{
int
red = 0;
int
green = 0;
int
blue = 0;
bitmap.SetPixel(x, y, Color.FromArgb(0, red, green, blue));
}
}
2、
//using System.Windows.Media.Imaging;
//using System.Windows.Media;
//using System.Drawing;
public static void savepng(WriteableBitmap wtbBmp, string filename)
{
if (wtbBmp == null)
{
return;
}
try
{
RenderTargetBitmap rtbitmap = new RenderTargetBitmap(wtbBmp.PixelWidth, wtbBmp.PixelHeight, wtbBmp.DpiX, wtbBmp.DpiY, PixelFormats.Default);
DrawingVisual drawingVisual = new DrawingVisual();
using (var dc = drawingVisual.RenderOpen())
{
dc.DrawImage(wtbBmp, new Rect(0, 0, wtbBmp.Width, wtbBmp.Height));
}
rtbitmap.Render(drawingVisual);
//System.Windows.Media.Imaging.
//BmpBitmapEncoder bitmapEncoder = new BmpBitmapEncoder();
PngBitmapEncoder bitmapEncoder = new PngBitmapEncoder();
bitmapEncoder.Frames.Add(BitmapFrame.Create(rtbitmap));
if (!File.Exists(filename))
{
FileStream file = new FileStream(filename, FileMode.OpenOrCreate);
//bitmapEncoder.Save(File.OpenWrite(filename));
MemoryStream stream = new MemoryStream();
bitmapEncoder.Save(stream);
long size = stream.Seek(0, SeekOrigin.Current);
file.Write(stream.ToArray(), 0, (int)size);
stream.Close();
file.Close();
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.ToString());
}
}
static void Main(string[] args)
{
int width = 600;
int height = 600;
WriteableBitmap tempBitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgra32, null);
tempBitmap.Lock();
int size = 600 * 600;
byte[] color = new byte[4] { 100, 100, 100, 255 };//bgra
byte[] content = new byte[size*4]; //第一字节不能为空，否则会保存图像失败
for (int i = 0; i < size; i++)
{
content[i * 4 + 0] = color[0];
content[i * 4 + 1] = color[1];
content[i * 4 + 2] = color[2];
content[i * 4 + 3] = color[3];
}
tempBitmap.WritePixels(new Int32Rect(0, 0, width, height), content, width * 4, 0);
tempBitmap.Unlock();
savepng(tempBitmap, "E:/aaa/test.png");
//Bitmap bmp = new Bitmap(128, 128, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
//Console.Read();
}