本文整理匯總了C#中System.Pixel.GetUpperBound方法的典型用法代碼示例。如果您正苦於以下問題：C# Pixel.GetUpperBound方法的具體用法？C# Pixel.GetUpperBound怎麽用？C# Pixel.GetUpperBound使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Pixel的用法示例。
在下文中一共展示了Pixel.GetUpperBound方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: PixelsAsBitmap
/*
* This is an unsafe method call that locks the bitmap data
* and uses low-level pointers to perform the updates. This
* provides a crucial performance boost, and is generally
* the suggested method for doing large image updates.
*/
unsafe private Bitmap PixelsAsBitmap(Pixel[,] image)
{
int width = image.GetUpperBound(0)+1;
int height = image.GetUpperBound(1)+1;
// 24 bits per pixel Bitmap (8 bytes per color - R,G,B)
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);
BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, bmp.PixelFormat);
// Point to the beginning of our bitmap
byte* origin = (byte*) bmpData.Scan0;
// why not parallelize this too!
Parallel.For(0, width,
(xPixel) =>
{
for (int yPixel = 0; yPixel < height; yPixel++)
{
// this probably looks very strange. But, think of it this way,
// we generally work with images that are 2-dimensional arrays
// where we can access a pixel by image[x,y], however, we are only
// using one pointer to access every byte, so we have to translate.
// Rows have image width * 3 bytes in them, so each row is spaced (width *3)
// bytes apart, therefore, to access a certain row (or y) we add
// (yPixel * width * 3) to the origin, and then access the column (or x)
// by adding (xPixel * 3).
byte* pixel = origin + (yPixel * width * 3) + (xPixel * 3);
pixel[0] = image[xPixel, yPixel].r;
pixel[1] = image[xPixel, yPixel].g;
pixel[2] = image[xPixel, yPixel].b;
}
});
bmp.UnlockBits(bmpData);
return bmp;
}