C uses GDI to draw common graphics and text
- 2021-09-20 21:19:44
- OfStack
Needless to say, let's get to know this GDI + first and see what it looks like.
GDI +: Graphics Device Interface Plus is also a graphics device interface, which provides a variety of rich graphics and image processing functions; In C #. NET, GDI + is used to process 2D graphics and images, and DirectX is used to process 3D graphics and images. The main namespace used in graphics and image processing is System. Drawing: Provides access to basic graphics functions of GDI +, mainly including Graphics, Bitmap, classes inherited from Brush, Font, Icon, Image, Pen, Color, etc.
After understanding what GDI + is, let's show you what it can do with a few examples.
Step 1 Draw a straight line
private void btnDrawLine_Click(object sender, EventArgs e)
{
// Create 1 Drawing surface
Graphics g = this.CreateGraphics();
// Create 1 A pen
Pen pen = new Pen(Brushes.Red);
// Two coordinates of a straight line
Point pointStart = new Point(10, 10);
Point pointEnd = new Point(50, 50);
// Start drawing
g.DrawLine(pen, pointStart, pointEnd);
}
Step 2 Draw a rectangle
private void btnDrawRectangle_Click(object sender, EventArgs e)
{
// Create 1 Drawing surface
Graphics g = this.CreateGraphics();
// Create 1 A pen
Pen pen = new Pen(Brushes.DeepSkyBlue);
// Determine the starting point, length and height of the rectangle
g.DrawRectangle(pen, 50, 50, 60, 30);
}
3. Draw a string
private void btnDrawString_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Font font = new Font(" Huawei Song Style ", 12);
//Point1 Sample, except that the value is a floating-point type
PointF point = new PointF(50, 50);
g.DrawString(" I am Kimisme", font, Brushes.Coral, point);
}
Step 4 Draw a fan
private void btnDrawSector_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
g.DrawPie(new Pen(Brushes.Green),
new Rectangle(new Point(100, 70),
new Size(50, 50)), 60, 90);
}