Skip to content

GitLab

Last edited by Vincent Wei
Page history
This is an old version of this page. You can view the most recent version or browse the history.

Using SyncUpdateDC to Reduce Screen Flicker

How to use MiniGUI's synchronous update mechanism to reduce screen flicker.

Table of Contents

Overview

Usage

  • Including option --enable-syncupdate when configuring MiniGUI.
  • Using a shadow NEWGAL engine and implementing UpdateRects method of your NEWGAL engine to update the dirty regions to your real screen frame buffer.
  • Calling SyncUpdateDC(HDC_SCREEN) when you want to update the screen. Generally, you can call this function after calling EndPaint function when handling MSG_PAINT message.

Restrictions

The synchronous update mechanism provides an easy way to reduce the screen flicker. However, it has the following restrictions:

  • It only works with low resolution.
  • It may hide a lot of inefficient code in your MiniGUI app.
  • It lacks support for hardware acceleration.

Therefore, for modern graphics stack (system shipped with a GPU), the better way is using off-screen surface and exploiting the hardware acceleration as far as possible.