[SDL] Newbie: Color confusion in TTF_RenderUNICODE_Solid

Phuoc Can Hua phuoccanhua at yahoo.com.au
Fri Dec 21 05:19:29 PST 2007


I'm trying to draw text with outline font in two
colors. My codes look something like this:
SDL_Color black = { 0x00, 0x00, 0x00, 0 };
SDL_Color red = { 0xFF, 0x00, 0x00, 0 };

text0=
TTF_RenderUNICODE_Solid(font,(Uint16*)"aSfU\000",
red);
text1=
TTF_RenderUNICODE_Solid(font,(Uint16*)"aSfU\000",
black);

text2= SDL_ConvertSurface( text0, text0->format,
SDL_SWSURFACE);
// Draw outline with shifted text
dstrect.w = text2->w;
dstrect.h = text2->h;
dstrect.x = 0;
dstrect.y = 1;
SDL_BlitSurface( text0, NULL, text2, &dstrect);
dstrect.y = 3;
SDL_BlitSurface( text0, NULL, text2, &dstrect);
...

dstrect.x = 2;
SDL_BlitSurface( text0, NULL, text2, &dstrect);

// Draw the centre text in black
dstrect.x = 0;
dstrect.y = 2;
SDL_BlitSurface( text1, NULL, text2, &dstrect);
...

SDL_BlitSurface( text2, NULL, screen, &dstrect)

I know, It's a bit messy with the different surfaces.
Everything looks okay. But... when I start
experimenting with the RGB values for the centre text.
All other colors don't work. They either appear as red
or background color.

Is that because a palette is used in the format?
Is that the way I handle the 3 surfaces?
Can someone suggest a solution for that and any 2
colors can be used?

thanks
Phuoc Can HUA



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