SDL surfaces not implemented about quipkit HOT 7 CLOSED

I'll get right on it.

EDIT: I'll need to:

• make some sort of userdata handle to SDL_Surface structs
• return the screen surface for SetVideoMode
• implement BlitSurface, LoadBMP and Flip so I can tell it's all working

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Will the PNG library be able to work with it once implemented?

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Not for a while: this is really complicated.

I think SDL_Surface is the biggest struct in SDL, so getting it into Lua is a great deal of work. Some SDL_Surfaces must be freed, others must not be, complicating GC. It has a dumb pixel store, meaning that anything you put in there needs to be manually translated into the surface's pixel format, PNGs included. Plus that pixel format is itself another struct. And the non-trivial bitflag-to-Lua-table conversion is going to take quite a while on both of those structs.

For now, I'm putting in just BMP support, because it's built into SDL, skipping the whole pixel format situation that could take dozens of special cases to get right.

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Add very early SDL_Surface support. Closed by 12036cc.

• SDL functions added: BlitSurface, Flip, FreeSurface, LoadBMP.
• SetVideoMode now returns an SDL surface usable with the above
  functions.
• New test: test/blit.lua shows a square smiley for a few seconds.
• Many things not implemented yet, like loading PNGs into
  surfaces, getting surface flags, width/height, clipping rect.
• There's no way to access the surface pixel format or pixels
  either. Thought needs to be put into the design.
• I'm considering porting an existing Lua/SDL binding library. I
  don't want engine development to swamp the project.

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It has a dumb pixel store, meaning that anything you put in there needs to be manually translated into the surface's pixel format, PNGs included.

Actually, it looks like SDL_CreateRGBSurfaceFrom performs some conversion from raw pixel data, so PNG support may be doable after all. Create a new issue if you want it.

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Very impressive. You're making bounds and leaps here. :)

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Glad you like it. :)

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