C#以動畫方式顯示圖像(4)

原理: 使用 ImageAttrributes 類的 SetColorMatrix() 方法設置顏色, 調整矩陣實現淡出的效果. 此類還可以對顏色進行校正, 調暗, 調亮和移除等.

代碼:

淡入顯示效果

Code

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CODE:

private void button1_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();
//創建淡入顏色矩陣
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0到1進行修改色彩變換矩陣主對角線上的數值
//使三種基准色的飽和度漸增
Single count = (float)0.0;
while (count < 1.0)
{
matrix.Matrix00 = count;
matrix.Matrix11 = count;
matrix.Matrix22 = count;
matrix.Matrix33 = 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(200);
count = (float)(count + 0.02);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示");
}
}