drawing everything before drawing to the screen

schmintan

21y6.1kGDI+

i have created my own draw method to draw moving items to the screen. this is run from inside a thread. i get awaul flicker, which can be kinda controlled by adjusting the sleep time of the thread, but this is not fully effective. is there anyway to draw the full image to something ( a bitmap or some image object) before drawing this to the form? i dont think the built in doubble buffering is working as im not using the Form_OnPaint() method. SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.DoubleBuffer, true); any ideas on how to completely rid myself of flicker. heres my paint method. private void DrawToScreen(Graphics g) { g.FillRectangle(Brushes.Cyan,1,1,this.Width,this.Height); foreach (Wall w in this.walls) { w.DrawWall(g); } crowd.DrawToScreen(g); }

5 Replies

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bilnaad21y ago
the code draws everything you need to a bitmap in memory and then copies that bitmap into the control
bilnaad21y ago
As you can see imgBuff should be a Bitmap. Since a Bitmap instance is assigned to it.
schmintan21y ago
can you please explain whats going on in your code?
schmintan21y ago
what kind of object is ImageBuff? is it a bitmap, or what??
flyinglogic21y ago
I hope this will help you if (imgBuff == null) { imgBuff = new Bitmap(pictureBox1.Image.Width, pictureBox1.Image.Height); } using (Graphics g = Graphics.FromImage(imgBuff)) { g.Clear(Color.White); rectBuff = new Rectangle(xOffset, yOffset, pictureBox1.Image.Width, pictureBox1.Image.Height); g.DrawImage(pBxImg, 0, 0, rectBuff, GraphicsUnit.Pixel); } pictureBox1.Image = imgBuff;