Migration Guide lacks SDL1 flags

SDL Development
1

Hi all.

New to SDL (either version) and I’m trying to convert AGAR (GUI) from SDL1.2 to SDL2.

The main dependencies that are causing an issue are the flags for various structures/calls.

SDL1                           SDL2
SDL_SRCCOLORKEY                SDL_GetColorKey()
SDL_SRCALPHA                   SDL_GetSurfaceAlphaMod() or SDL_ISPIXELFORMAT_ALPHA ???
SDL_RESIZABLE                  SDL_WINDOW_RESIZABLE
SDL_FULLSCREEN                 SDL_WINDOW_FULLSCREEN
SDL_NOFRAME                    SDL_WINDOW_BORDERLESS
SDL_DOUBLEBUF                  SDL_RENDERER_PRESENTVSYNC 
SDL_ASYNCBLIT                  ???
SDL_ANYFORMAT                  not really relevant anymore???
SDL_HWPALETTE                  not really relevant anymore???
SDL_OPENGL                     ???
SDL_OPENGLBLIT                 ???
SDL_HWSURFACE                  ???

Any tips regarding ??? would be appreciated

other related topics:

https://discourse.libsdl.org/t/migrating-from-sdl-1-2-to-sdl2-some-problems/21766

https://discourse.libsdl.org/t/sdl-1-2-to-sdl2-sdl-srccolorkey-sdl-srcalpha/24694/3

2

SDL_ASYNCBLIT
SDL 2 uses backbuffering, so this is obsolete: SDL_RenderPresent

SDL_ANYFORMAT
SDL_GetClosestDisplayMode

SDL_OPENGL
SDL_GL_CreateContext to create an OpenGL context. More GL functions available.

SDL_OPENGLBLIT
Obsolete due to above functions.

SDL_HWSURFACE
All textures are now hardware accelerated, (unless you’re in software mode). Quote: you almost always get hardware acceleration now, and the API has changed to reflect this.

3

SDL_WINDOW_OPENGL as a flag for SDL_CreateWindow() is also needed (and probably the closest equivalent to SDL1’s SDL_OPENGL)

4

Ooops, missed that. Sorry. :slight_smile: