十一将至, 放假前将GDI+最后一部分今天终于完成: 以动画的方式显示图像。希望对 GDI+编程的园友有所帮助。
PPT 以动画方式显示幻灯片是其一个很重要的特点,相信里边一定有您喜欢的动画方式,今天我就带大家认识几款以动画方式显示幻灯片的制作方法,由于是GDI+编程, 这里以图像代替幻灯片(其实原理是相通的)来演示如何制作以动画方式显示图像。
说明: 由于是以动画方式显示图像, 这里没办法直接贴静态截图, 因此决定给园友开源, 将所有的可运行代码附在案例后面, 由于所有的动画处理图像的对象放在都pictureBox控件中, 同时定义的类都大同小异, 因此这里先把下面案例中要用到的所有类及装载图像的代码给大家, 运行时用这里的代码加下面任意一个实例的代码即可运行程序! 同时楼主保证每个案例代码都编译通过, 绝不忽悠!
private Bitmap SourceBitmap;
private Bitmap MyBitmap;
private void button2_Click(object sender, EventArgs e)
{
//打开图像文件
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "图像文件(JPeg, Gif, Bmp, etc.)
|*.jpg?http://www.xvna.com;*.jpeg;*.gif?http://www.xvna.com;*.bmp;*.tif; *.tiff; *.png| JPeg 图像文件(*.jpg?http://www.xvna.com;*.jpeg)
|*.jpg?http://www.xvna.com;*.jpeg |GIF 图像文件(*.gif?http://www.xvna.com)|*.gif?http://www.xvna.com |BMP图像文件(*.bmp)|*.bmp
|Tiff图像文件(*.tif;*.tiff)|*.tif;*.tiff|Png图像文件(*.png)| *.png |所有文件(*.*)|*.*";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
//得到原始大小的图像
SourceBitmap = new Bitmap(openFileDialog.FileName);
//得到缩放后的图像
MyBitmap = new Bitmap(SourceBitmap, this.pictureBox1.Width, this.pictureBox1.Height);
this.pictureBox1.Image = MyBitmap;
}
}
一. 以上下反转的方式显示图像.
原理: 计算图像位置和高度后以高度的一半为轴进行对换上下半边的图像.
代码:
private void button1_Click(object sender, EventArgs e)
{
try
{
int width = this.MyBitmap.Width; //图像宽度
int height = this.MyBitmap.Height; //图像高度
Graphics g = this.panel1.CreateGraphics();
g.Clear(Color.Gray);
for (int i = -width / 2; i <= width / 2; i++)
{
g.Clear(Color.Gray);
int j = Convert.ToInt32(i * (Convert.ToSingle(height) / Convert.ToSingle(width)));
Rectangle DestRect = new Rectangle(0, height / 2 -j, width, 2 * j);
Rectangle SrcRect = new Rectangle(0, 0, MyBitmap.Width, MyBitmap.Height);
g.DrawImage(MyBitmap, DestRect, SrcRect, GraphicsUnit.Pixel);
System.Threading.Thread.Sleep(10);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示");
}
}
二. 以上下对接的方式显示图像
原理: 首先将图像分为上下两部分, 然后分别显示.
代码:
private void button1_Click(object sender, EventArgs e)
{
try
{
int width = this.pictureBox1.Width; //图像宽度
int height = this.pictureBox1.Height; //图像高度
Graphics g = this.panel1.CreateGraphics();
g.Clear(Color.Gray);
Bitmap bitmap = new Bitmap(width, height);
int x = 0;
while (x <= height / 2)
{
for (int i = 0; i <= width - 1; i++)
{
bitmap.SetPixel(i, x, MyBitmap.GetPixel(i, x));
}
for (int i = 0; i <= width - 1; i++)
{
bitmap.SetPixel(i, height - x - 1, MyBitmap.GetPixel(i, height - x - 1));
}
x++;
this.panel1.Refresh();
g.DrawImage (bitmap,0,0);
System.Threading.Thread.Sleep(10);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示");
}
}
三. 以四周扩散的方式显示图像
原理: 首先设置图像显示的位置, 然后按高度和宽度的比例循环输出, 直到高度和宽度为原始大小.
代码:
private void button1_Click(object sender, EventArgs e)
{
try
{
int width = this.MyBitmap.Width; //图像宽度
int height = this.MyBitmap.Height; //图像高度
//取得Graphics对象
Graphics g = this.panel1.CreateGraphics();
g.Clear(Color.Gray); //初始为全灰色
for (int i = 0; i <= width / 2; i++)
{
int j = Convert.ToInt32 (i*(Convert.ToSingle(height) / Convert.ToSingle(width)));
Rectangle DestRect = new Rectangle(width / 2 - i, height/2-j, 2 * i, 2*j);
Rectangle SrcRect = new Rectangle(0, 0, MyBitmap.Width, MyBitmap.Height);
g.DrawImage(MyBitmap, DestRect, SrcRect, GraphicsUnit.Pixel);
System.Threading.Thread.Sleep(10);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示");
}
}
四. 以分块效果显示图像
原理: 首先将图分为几块, 再使用 Bitmap 类的 Clone方法从原图指定的块中复制图像, 最后将这些块依次显示出来便可
代码:
private void button1_Click(object sender, EventArgs e)
{
Graphics g = this.panel1.CreateGraphics();
g.Clear(Color.White);
int width = MyBitmap.Width;
int height = MyBitmap.Height;
//定义将图片切分成四个部分的区域
RectangleF[] block ={
new RectangleF(0,0,width/2,height/2),
new RectangleF(width/2,0,width/2,height/2),
new RectangleF(0,height/2,width/2,height/2),
new RectangleF(width/2,height/2,width/2,height/2)};
//分别克隆图片的四个部分
Bitmap[] MyBitmapBlack ={
MyBitmap.Clone(block[0],System.Drawing.Imaging.PixelFormat.DontCare),
MyBitmap.Clone(block[1],System.Drawing.Imaging.PixelFormat.DontCare),
MyBitmap.Clone(block[2],System.Drawing.Imaging.PixelFormat.DontCare),
MyBitmap.Clone(block[3],System.Drawing.Imaging.PixelFormat.DontCare)};
//绘制图片的四个部分,各部分绘制时间间隔为0.5秒
g.DrawImage(MyBitmapBlack[0], 0, 0);
System.Threading.Thread.Sleep(1000);
g.DrawImage(MyBitmapBlack[1], width / 2, 0);
System.Threading.Thread.Sleep(1000);
g.DrawImage(MyBitmapBlack[3], width / 2, height / 2);
System.Threading.Thread.Sleep(1000);
g.DrawImage(MyBitmapBlack[2], 0, height / 2);
}
五. 以淡入淡出效果显示图像
原理: 使用 ImageAttrributes 类的 SetColorMatrix() 方法设置颜色, 调整矩阵实现淡出的效果. 此类还可以对颜色进行校正, 调暗, 调亮和移除等.
代码:
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();
//创建淡入颜色矩阵
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;
//从0到1进行修改色彩变换矩阵主对角线上的数值
//使三种基准色的饱和度渐增
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);