I’m trying to add font support to my project.
I’ve downloaded SDL_ttf and everything works fine.
However, I’ve had a look at the glfont.c sample,
and it only shows how to do the blended mode
(which is the slowest/nicest one).
Are you using OpenGL or just plain SDL?
So I need to clarify something…In the SDL_GL_Enter2DMode
for this example, glEnable(GL_BLEND) and the glBlendFunc(…)
only need to be called for the blended more, right?
Don’t know, in my game engine GL_BLEND is all time enabled and they are rendered ok… probably if you disable GL_BLEND, your texts will also have background drawn (in shaded mode, solid should give the same results).
I.e. if I’m rendering in Solid or Shaded modes, I don’t
actually need to enable blending in openGL.
Is this correct?
See above… probably not, but output will vary.
Also, you could take a look at this little snippet I’ve found on my hard drive, it’s not in OGL (plain SDL) but if you want I can send you my SDL_TTF/OGL (very efficient*) font engine:
include <stdio.h>
#include <stdlib.h>
#include
#include
#include <time.h>
#include <SDL.h>
#include <SDL_TTF.h>
int main( int argc, char* argv[] ) {
if( SDL_Init(SDL_INIT_VIDEO)==(-1) ) {
printf(“Could not initialize SDL: %s.\n”, SDL_GetError());
exit(-1);
}
SDL_Surface *screen;
int WINWIDTH = 800, WINHEIGHT = 600, BPP = 32;
screen = SDL_SetVideoMode( WINWIDTH,WINHEIGHT, BPP, SDL_SWSURFACE | SDL_FULLSCREEN );
if( screen == NULL ) {
fprintf(stderr, “Couldn’t set %ix%ix%i video mode: %s\n”, WINWIDTH,WINHEIGHT,BPP, SDL_GetError());
exit(1);
}
TTF_Init();
TTF_Font *fntCourier = TTF_OpenFont( “cour.ttf”, 25 );
SDL_Color clrFg = {220,50,50,0}; // Blue (“Fg” is foreground)
SDL_Color clrBg = {0,0,0,0};
SDL_Rect rcDest = {20,20,0,0};
SDL_Surface * sText = TTF_RenderText_Solid( fntCourier, “Courier 12”, clrFg);
SDL_BlitSurface( sText,NULL, screen,&rcDest );
rcDest.y = 60;
sText = TTF_RenderText_Shaded( fntCourier, “Courier 12!@#$%^&*()_+[]”, clrFg, clrBg );
SDL_BlitSurface( sText,NULL, screen,&rcDest );
rcDest.y = 100;
sText = TTF_RenderText_Blended( fntCourier, “So we met there, and started to bangle \n each other and drink green tea (YEEEAH!).”, clrFg);
SDL_BlitSurface( sText,NULL, screen,&rcDest );
fprintf(stderr, " Width: %i Height: %i", sText->w, sText->h);
SDL_Flip(screen);
SDL_Event event ;
for ( ; ; )
{
if ( SDL_PollEvent ( &event ) )
{
if ( event.type == SDL_KEYDOWN ) break ;
}
}
SDL_FreeSurface( sText );
TTF_CloseFont( fntCourier );
TTF_Quit();
SDL_Quit();
return 0;
}
Koshmaar
-
- it uses Bob Pendelton’s solution for prerendering individual glyphs, therefore -> no need for dynamic memory allocation and sending textures to video card every frame
