C#圖象通明度調劑的辦法。本站提示廣大學習愛好者:(C#圖象通明度調劑的辦法)文章只能為提供參考,不一定能成為您想要的結果。以下是C#圖象通明度調劑的辦法正文
本文實例講述了C#圖象通明度調劑的辦法。分享給年夜家供年夜家參考。詳細以下:
//界說圖象通明度調劑函數 public Bitmap PTransparentAdjust(Bitmap src,int num) { try { int w = src.Width; int h = src.Height; Bitmap dstBitmap = new Bitmap(src.Width, src.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb); System.Drawing.Imaging.BitmapData srcData = src.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb); System.Drawing.Imaging.BitmapData dstData = dstBitmap.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb); unsafe { byte* pIn = (byte*)srcData.Scan0.ToPointer(); byte* pOut = (byte*)dstData.Scan0.ToPointer(); byte* p; int stride = srcData.Stride; int r, g, b; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { p = pIn; b = pIn[0]; g = pIn[1]; r = pIn[2]; pOut[1] = (byte)g; pOut[2] = (byte)r; pOut[3] = (byte)num; pOut[0] = (byte)b; pIn += 4; pOut += 4; } pIn += srcData.Stride - w * 4; pOut += srcData.Stride - w * 4; } src.UnlockBits(srcData); dstBitmap.UnlockBits(dstData); return dstBitmap; } } catch (Exception e) { MessageBox.Show(e.Message.ToString()); return null; } }
原圖:
後果圖(50%):
願望本文所述對年夜家的C#法式設計有所贊助。