c# - 索引图像上的图形

我收到错误消息:



在功能上:

public static void AdjustImage(ImageAttributes imageAttributes, Image image)
{
        Rectangle rect = new Rectangle(0, 0, image.Width, image.Height);

        Graphics g = Graphics.FromImage(image);
        g.InterpolationMode = InterpolationMode.HighQualityBicubic;
        g.DrawImage(image, rect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, imageAttributes);
        g.Dispose();
}

我想问你，我该如何解决？

最佳答案

引用ojota，可以通过创建具有相同尺寸，正确的PixelFormat以及该位图上的绘制的空白位图来解决。

// The original bitmap with the wrong pixel format.
// You can check the pixel format with originalBmp.PixelFormat
Bitmap originalBmp = new (Bitmap)Image.FromFile("YourFileName.gif");

// Create a blank bitmap with the same dimensions
Bitmap tempBitmap = new Bitmap(originalBmp.Width, originalBmp.Height);

// From this bitmap, the graphics can be obtained, because it has the right PixelFormat
using(Graphics g = Graphics.FromImage(tempBitmap))
{
    // Draw the original bitmap onto the graphics of the new bitmap
    g.DrawImage(originalBmp, 0, 0);
    // Use g to do whatever you like
    g.DrawLine(...);
}

// Use tempBitmap as you would have used originalBmp
return tempBitmap;

关于c# - 索引图像上的图形，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/17313285/