Suggestion for SDL 1.3

SDL Development
#1

Hi there,

Here is a suggestion for a small API change (so I guess this will have to
wait for SDL 1.3 or 2.0 or whatever…)

I’d like this function:
int SDL_SetAlpha(SDL_Surface *surface, Uint32 flag, Uint8 alpha);
changed to:
int SDL_SetAlpha(SDL_Surface *surface, Uint8 alpha);

I think flags are not needed in the parameters because:

  1. you can safely guess the value of SDL_SRCALPHA
    alpha<255 => set SDL_SRCALPHA
    alpha=255 => unset SDL_SRCALPHA

  2. SDL_RLEACCEL shouldn’t be set here ! It’s annoying to have to check if
    SDL_RLEACCEL was on not to remove it accidentaly by setting the alpha. We
    should have a new procedure SDL_SetRLEAccel or something like that.

the same comment applies to

int SDL_SetColorKey(SDL_Surface *surface, Uint32 flag, Uint32 key);

except here you might want to keep the flag to have the full 32bits of the
key argument to specify the color (not very usefull though since I don’t
think the 8bits of the alpha channel is of any use in a colorkey.

Ok, that’s it… for now… :wink:

-Ga?tan.

#2

Hi there,

Here is a suggestion for a small API change (so I guess this will have to
wait for SDL 1.3 or 2.0 or whatever…)

Noted, thanks.

See ya,
-Sam Lantinga, Software Engineer, Blizzard Entertainment