private void SetBrushRemapTable_Click(object sender, System.EventArgs e)
{
Graphics g = this.CreateGraphics();
g.Clear(this.BackColor);
Color lClr = Color.FromArgb(245, 0, 0);
Color uClr = Color.FromArgb(255, 0, 0);
ColorMap[] clrMapTable = new ColorMap[1];
clrMapTable[0] = new ColorMap();
clrMapTable[0].OldColor = lClr;
clrMapTable[0].NewColor = uClr;
ImageAttributes ImgAttr = new ImageAttributes();
ImgAttr.SetBrushRemapTable(clrMapTable);
Image curImage = Image.FromFile(@"f:\dnWatcher.gif");
g.DrawImage(curImage, 0, 0);
Rectangle rect = new Rectangle(0, 0, 400, 400);
g.DrawImage(curImage, rect, 0, 0, 400, 400,
GraphicsUnit.Pixel, ImgAttr);
// Dispose
g.Dispose();
}
/// <summary>
/// 添加图片水印
/// </summary>
/// <param name="p_imageFile">图像文件</param>
/// <param name="p_saveFile">图像保存路径</param>
/// <param name="p_SimageFile">水印图片文件</param>
/// <param name="p_position">水印位置</param>
/// <param name="p_Transparent">透明度</param>
public void WaterMark(string p_ImageFile, string p_saveFile, string p_SimageFile, int p_position, int p_Transparent)
{
Image p_imageFile = new Bitmap(p_ImageFile);
int originalWidth = p_imageFile.Width;
int originalHeight = p_imageFile.Height;
using (Image newImage = new Bitmap(p_imageFile))
{
Graphics g = Graphics.FromImage(newImage);
Image SnewImage = new Bitmap(p_SimageFile);
if (SnewImage.Height < originalHeight && SnewImage.Width < originalWidth)
{
ImageAttributes Property = new ImageAttributes();
ColorMap Mapping = new ColorMap();
Mapping.OldColor = Color.FromArgb(255, 0, 0, 0);
Mapping.NewColor = Color.FromArgb(0, 0, 0, 0);
Property.SetBrushRemapTable(new ColorMap[] { Mapping });
float Transparent = 0.5F;
if (p_Transparent >= 1 && p_Transparent <= 10)
{
Transparent = p_Transparent / 10.0F;
}
float[][] MatrixNode =
{
new float[] { 1.0f, 0.0f, 0.0f, 0.0f, 0.0f },
new float[] { 0.0f, 1.0f, 0.0f, 0.0f, 0.0f },
new float[] { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f },
new float[] { 0.0f, 0.0f, 0.0f, Transparent, 0.0f },
new float[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f }
};
ColorMatrix Matrix = new ColorMatrix(MatrixNode);
Property.SetColorMatrix(Matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int x = 0;
int y = 0;
//水印位置
getImageST(p_position, originalWidth, originalHeight, SnewImage.Width, SnewImage.Height, out x, out y);
//绘图
g.DrawImage(SnewImage, new Rectangle(x, y, SnewImage.Width, SnewImage.Height), 0, 0, SnewImage.Width, SnewImage.Height, GraphicsUnit.Pixel, Property);
p_imageFile.Dispose();
SnewImage.Dispose();
g.Dispose();
if (string.IsNullOrEmpty(p_saveFile))
{
newImage.Save(p_ImageFile, ImageFormat.Jpeg);
}
else
{
newImage.Save(p_saveFile, ImageFormat.Jpeg);
}
}
}
}
// Snippet for: M:System.Drawing.Imaging.ImageAttributes.SetBrushRemapTable(System.Drawing.Imaging.ColorMap[])
// <snippet1>
public void SetBrushRemapTableExample(PaintEventArgs e)
{
// Create a color map.
ColorMap[] myColorMap = new ColorMap[1];
myColorMap[0] = new ColorMap();
myColorMap[0].OldColor = Color.Red;
myColorMap[0].NewColor = Color.Green;
// Create an ImageAttributes object, passing it to the myColorMap
// array.
ImageAttributes imageAttr = new ImageAttributes();
imageAttr.SetBrushRemapTable(myColorMap);
}
private void SetBrushRemapTable_Click(object sender,
System.EventArgs e)
{
Graphics g = this.CreateGraphics();
g.Clear(this.BackColor);
ColorMap[] clrMapTable = new ColorMap[1];
clrMapTable[0] = new ColorMap();
clrMapTable[0].OldColor = Color.Red;;
clrMapTable[0].NewColor = Color.Green;
ImageAttributes ImgAttr = new ImageAttributes();
ImgAttr.SetBrushRemapTable(clrMapTable);
Image curImage = Image.FromFile("Sample.bmp");
g.DrawImage(curImage, 0, 0);
Rectangle rect = new Rectangle(0, 0, 400, 400);
g.DrawImage(curImage, rect, 0, 0, 400, 400,
GraphicsUnit.Pixel, ImgAttr);
// Dispose
g.Dispose();
}