sprite experiment

[ghost]

I was experimenting with sprites which might be a cool feature.

This uses SDL_Image to load an image. Currently it only handles 24 bit RGB png. Needs some flexibility to handle other formats like 32-bit RGBA. It stores the SDL_Surface pointer in a user data and caches it in the Lua registry.

Feel free to merge, modify or reject with suggestions.

[rlane]

Once you merge with antirez/master you should be able to use SDL_BlitSurface to draw the sprite.

If the image load fails, maybe it would be better to throw a Lua error instead of returning nothing?

[ghost]

Wanted to do that. After your makefile cleanup I can't build. Had to make two changes to the makefile. This is my first time using git, so still trying to figure out how to do this.

[rlane]

What's the error message? You'll need to add SDL_image to the PKGS list and install SDL_gfx if you don't already have it.

[ghost]

1) doesn't build liblua.a

$ make cc -O2 -Wall -W -Ilua/src pkg-config --cflags sdl SDL_gfx -c -o load81.o load81.c cc load81.o -lm lua/src/liblua.a pkg-config --libs sdl SDL_gfx -o load81 cc: error: lua/src/liblua.a: No such file or directory make: *\ [load81] Error 1

2) some error finding sin. had to swap -lm and liblua.

[ghost]

@rlane I have the blit working. I'll try to clean things up, including throwing an error, and resubmit later this evening.

[ghost]

BTW, where is the origin of the sprite in Codea? (Don't have an iPad yet.)