/Screen_Shot-SDL2

an screen shot app built with SDL2 (windows specific)

Primary LanguageC++MIT LicenseMIT

ScreenShot

This is an windows application built with SDL2 which can capture specific screen and save it as bmp file

Dependencies

  1. SDL2
  2. SDL2_image
  3. gdi32 (windows specific)
  4. Comdlg32 (windows common file dialog)

How to compile

  1. First compile icon and obj file
windres myIcon.rc -O coff -o myIcon.res
g++ -O2 -Wall -std=c++11 -c main.cpp -lgdi32 -lComdlg32 -lmingw32 -lSDL2main -lSDL2 -lSDL2_image -mwindows
  1. Next compile them into one program
g++ -O2 -Wall -std=c++11 -o run.exe main.o myIcon.res -lgdi32 -lComdlg32 -lmingw32 -lSDL2main -lSDL2 -lSDL2_image -mwindows

Sample Image
sample.jpg
Captured using itself (by opening two of this app)

Additional Infomation
In plain SDL2, it's impossible to capture the system screen. Therefore, I only use SDL2 as a window application tool. For the part of screen capture, I create MIPMAP obj from the current screen context, then transformed it into SDL_Surface object type. At last, I use the built in function SDL_SaveBMP to save the data as bmp file.
Taking a screenshot is quite system specific, and quite complicated. There's more to learn
Now I added common file dialog (old version using commdlg.h). It's quite a lot to learn when it comes deeper.