10 replies to this topic

[flyingfisch]

OK, besides the fact that a lot of other forums have one of these, I want to have a place to dump code I find.

So, first one:

This will make 5-6-5 RGB for you:

uint16_t drawRGB24toRGB565(uint8_t r, uint8_t g, uint8_t <img src='/dot/public/style_emoticons/<#EMO_DIR#>/cool.png' class='bbc_emoticon' alt='B)' /> 
 { 
   return ((r / 8) << 11) | ((g / 4) << 5) | (b / 8); 
 }

Found at AdaFruit Forums

[Anonymouse]

That might not be optimal CPU-cycle-wise, depending on whether the compiler optimises the divisions into bit-shifts...

(also it won't compile because of the capital B )

uint16_t drawRGB24toRGB565(uint8_t r, uint8_t g, uint8_t <img src='/dot/public/style_emoticons/<#EMO_DIR#>/cool.png' class='bbc_emoticon' alt='B)' />
{
return (r >> 3 << 11) | (g >> 2 << 5) | (b >> 3);
}

[flyingfisch]

Thanks for fixing my code, I didn't actually test it, so i didnt notice the capital B.

Probably should have, though, before posting it.

[shinolife63]

I hate the way c is so particular with letter casing

[flyingfisch]

I hate the way c is so particular with letter casing

Most languages besides BASIC are particular about case.

[shinolife63]

Most languages besides BASIC are particular about case.

I guess, Ive just always hated the c family of languadges because of the overall layout, like the stupid ";" after every line, which is why thus far ive avoided learning it

[flyingfisch]

I guess, Ive just always hated the c family of languadges because of the overall layout, like the stupid ";" after every line, which is why thus far ive avoided learning it

Yes, that does get annoying, but almost all the lower-level languages have it. C is not designed to be as user-friendly as BASIC, it's designed to be powerful. I would try LuaFX if you don't feel you are ready for C just yet.

[shinolife63]

Yes, that does get annoying, but almost all the lower-level languages have it. C is not designed to be as user-friendly as BASIC, it's designed to be powerful. I would try LuaFX if you don't feel you are ready for C just yet.

Im kinda forced to learn it sooner or later, im going to highschool and taking classes working with circuitry, microproscesing and assembly languadge, might as well start now lol

[Casimo]

Hey, nothing against c!
It can be very user friendly, that depends on the way you use it! And that is the fact: You do not have functions like direct hardware access in LuaFX or Basic, so it is only user friendly because you cannot do anything big with it

[flyingfisch]

Hey, nothing against c!
It can be very user friendly, that depends on the way you use it! And that is the fact: You do not have functions like direct hardware access in LuaFX or Basic, so it is only user friendly because you cannot do anything big with it

Depends on your idea of "big". Also, it is not just the lack of direct hardware functions that makes lua more user-friendly. It is easy to make dynamic arrays in lua, in C its much harder.

[Casimo]

(This should be moved to an extra topic)

With "big" I mean fast, exciting games. In C, you can do everything, because LuaFX is made with C, so LuaFX cannot be better

Gotta make games in asm now