Double buffering & drawing outside region

[leventesen]

Hello,

I am using ATmega128A and SSD1963 chips with µGFX library. 

The maximum fps is 4 when clearing screen with simple background colors with GDISP module.

This means that I see the redrawing tear effect.

After some experiments I achieved double buffering.

Here the details:

The Lcd TFT screen resolution 480x272.

LCD_Parameters struct is initialized with 480x544 resolution which has double screen size.

My program first fills the non visible area, then scrolls to this area by a SSD1963 command, then repeats this.

With this hardware supported scrolling mechanism, problem was solved.

But,

I want to use GWIN module and don't know how to implement this technique for widgets, containers etc.

Do you have an idea?