Skia Graph Display

Question: How to draw different patterns on the canvas to reflect to the terminal.

The setdibitstodevice () function uses bitmap in srcx and srcy as the buffer by default. It has nothing to do with canvas. So how can we reflect the canvas rendering to the device?

Canvas = new skcanvas (* Bitmap );

Create a connection with the bitmap by initializing the canvas. In the future, no matter how many new bitmapx, canvas-> drawbitmap ();

Canvas-> drawtext ("Hello Sanghai", 15,400,400, paint );

Canvas-> drawsprite (* bitmap2, R. fleft, R. ftop, & paint );

Canvas-> drawbitmaprect (* bitmap3, R, & paint );

Canvas-> drawbitmaprecttorect (* bitmap4, & rect, R, & paint );

Canvas-> drawline (0, 0, bitmap-> width (), 0, paint );

And other operations on the canvas will be reflected on the device (HDC,

For canvas = new skcanvas ();

Canvas-> drawbitmap (* bitmap, R. fleft, R. ftop, & paint );

Canvas-> drawtext ()......

And so on, the canvas operation will only be the first bitmap to respond to the device DC.