Stefan Viljoen wrote:
Given this code:
I don’t know what that line does, but it’s definitely wrong.
See the SDL_SetAlpha manpage for more info :
Can anybody tell me WHY black pixels still do not get masked out? Both
and buttons[OK_BUT_PRESSED] is loaded from a .JPEG file, which has its
transparent areas set to RGB8 0,0,0 using the GIMP.
It might also happen that the jpeg compression loses "perfectly black"
pixels in favor of “almost black” pixels. Usually you can’t see the
difference, but SDL will.
Darn - what file format can I use to store graphics, except JPG, that will not
"lose" certain colors? JPEG compresses nicely, but if it does this it
obviously cannot be used for sprites. TGA? BMP? What would be best?
I think you might have hit it on the nose here. Anybody else got any ideas?
Any ideas anyone? Pointers to where I can get example code showing how to
implement totally transparent pixels in a source surface?
It depends on what you want. Do you want both translucency and
colorkeying ? Looking at your message, it seems not. So you shouldn’t
use both SDL_SetAlpha and SDL_SetColorKey at the same time. Try removing
the SDL_SetAlpha call.
Hmm - did remove the setalpha call - still does not take the “black” pixels
out. On the first question, no I do not want translucency - just transparency
in certain areas with “black” pixels.
Anyway, thanks Stephane!
I appreciate it
Regards,From: firstname.lastname@example.org (Stephane Marchesin)
Potchefstroom Public Safety Dept.
Republic of South Africa
“We want you to be soldiers - deadly as long as you have one leg or one arm
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