running-cat

SDL example of animated shaped window

This application was created for learning SDL and how to create shaped window. The image of cat was taken from book SDL Game Development of Shaun Ross Mitchell

The applicaion only works properly on linux with X11 driver and patched SDL library of 2.0.8 version.

Requirements

• SDL2 2.0.8
• SDL2_image 2.0.2 extention

Build

if SDL library has different location on you machine set include directory and SDL_LIBRARY by appropriate values in CMakeList.txt, use sdl2-config --cflags --libs

cmake ./
make

SDL 2.0.8 Patch note

SDL has no function to reset shape assigned to window, when a shape is changed its value combined with previous shape. The only way I found is call SDL_ResizeWindow and bitmaks for shaper is cleaned inside SDL library. If your shape changed every 100ms then a window of application is blinked randomly and it looks awful. I add SDL_ResetWindowShape function which reset shaper bitmaks without resizing a window and there is no blinking window.