C#以動畫方式顯示圖像(5)

淡出顯示圖像

private void button3_Click(object sender, EventArgs e)
{
try
{
Graphics g = this.panel1.CreateGraphics();
g.Clear(Color.Gray);
int width = MyBitmap.Width;
int height = MyBitmap.Height;
ImageAttributes attributes = new ImageAttributes();
ColorMatrix matrix = new ColorMatrix();
//創建淡出顏色矩陣
matrix.Matrix00 = (float)0.0;
matrix.Matrix01 = (float)0.0;
matrix.Matrix02 = (float)0.0;
matrix.Matrix03 = (float)0.0;
matrix.Matrix04 = (float)0.0;
matrix.Matrix10 = (float)0.0;
matrix.Matrix11 = (float)0.0;
matrix.Matrix12 = (float)0.0;
matrix.Matrix13 = (float)0.0;
matrix.Matrix14 = (float)0.0;
matrix.Matrix20 = (float)0.0;
matrix.Matrix21 = (float)0.0;
matrix.Matrix22 = (float)0.0;
matrix.Matrix23 = (float)0.0;
matrix.Matrix24 = (float)0.0;
matrix.Matrix30 = (float)0.0;
matrix.Matrix31 = (float)0.0;
matrix.Matrix32 = (float)0.0;
matrix.Matrix33 = (float)0.0;
matrix.Matrix34 = (float)0.0;
matrix.Matrix40 = (float)0.0;
matrix.Matrix41 = (float)0.0;
matrix.Matrix42 = (float)0.0;
matrix.Matrix43 = (float)0.0;
matrix.Matrix44 = (float)0.0;
matrix.Matrix33 = (float)1.0;
matrix.Matrix44 = (float)1.0;
//從1到0進行修改色彩變換矩陣主對角線上的數值
//依次減少每種色彩分量
Single count = (float)1.0;
while (count > 0.0)
{
matrix.Matrix00 = (float)count;
matrix.Matrix11 = (float)count;
matrix.Matrix22 = (float)count;
matrix.Matrix33 = (float)count;
attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
g.DrawImage(MyBitmap, new Rectangle(0, 0, width, height),
0, 0, width, height, GraphicsUnit.Pixel, attributes);
System.Threading.Thread.Sleep(20);
count = (float)(count - 0.01);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示");
}
}