Hi,
(and thanks for all the work you’ve done with SDL)
My problem
I’m using SDL2 and SDL2_TTF to try to render the two following strings with the following fonts:
“Un ?uf ?trange” (with an accent and an ‘?’) rendered with Liberation Serif
“'15#1” with Arundina Serif (available on most Linux distributions)
As you can see on the following screenshot, the rendered text is quite ugly and doesn’t look very natural:
[Image: http://oi44.tinypic.com/35b5beo.jpg ]
On the left is the SDL window, on the right is the way the text is displayed on LibreOffice with the same fonts and the same sizes.
I remember running in this problem in the past but I didn’t pay much attention. Now I’m wondering about what might cause this problem.
For the rendering, I have used
TTF_RenderUTF8_Blended
I have also tried with TTF_RenderText_Blended, _Shaded and _Solid but to no avail.
I’m running Fedora 20 but I had the same problem with Fedora 19, Ubuntu…
[b]The code[b]
Code:
#include<assert.h>
#include<locale.h>
#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<SDL2/SDL.h>
#include<SDL2/SDL_ttf.h>
static SDL_Renderer *s_renderer;
static SDL_Window *s_window;
static bool start_sdl(void) {
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) {
fprintf(stderr," Couldn’t initialize SDL2!\n=>\t%s\n", SDL_GetError());
return false;
}
if(TTF_Init() != 0) {
fprintf(stderr, "Couldn't initialize SDL2 ttf!\n=>\t%s\n", TTF_GetError());
return false;
}
return true;
}
static bool create_window(int width, int height) {
SDL_WindowFlags flags = 0;
s_window = SDL_CreateWindow("No title",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
width, height, flags);
if(!s_window) {
fprintf(stderr, "Couldn't create a %dx%d window!\n=>\t%s\n", width, height, SDL_GetError());
return false;
}
Uint32 renderer_flags = SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC;
s_renderer = SDL_CreateRenderer(s_window, -1, renderer_flags);
if(!s_renderer) {
fprintf(stderr, "Couldn't create a renderer for %dx%d window!\n=>\t%s\n", width, height, SDL_GetError());
return false;
}
return true;
}
static void stop_sdl(void) {
assert(s_window != NULL);
assert(s_renderer != NULL);
SDL_DestroyRenderer(s_renderer); s_renderer = NULL;
SDL_DestroyWindow(s_window); s_window = NULL;
/*
* quit SDL_ttf and SDL
*/
TTF_Quit();
SDL_Quit();
}
int main(void) {
start_sdl();
create_window(800, 600);
TTF_Font *font_standard = TTF_OpenFont("LiberationSerif-Regular.ttf", 52);
if(!font_standard) {
fprintf(stderr, "Couldn't open font! %s\n", TTF_GetError());
exit(EXIT_FAILURE);
}
TTF_Font *font_thai = TTF_OpenFont("ArundinaSerif.ttf", 32);
if(!font_thai) {
fprintf(stderr, "Couldn't open font! %s\n", TTF_GetError());
exit(EXIT_FAILURE);
}
SDL_Color font_color = {
0, 0, 0, 0
};
char *text_standard = "Un ?uf ?trange", *text_thai = "*'1*5#1";
SDL_Surface *surface_standard = TTF_RenderUTF8_Blended(font_standard, text_standard, font_color);
SDL_Surface *surface_thai = TTF_RenderUTF8_Blended(font_thai, text_thai, font_color);
SDL_Texture *texture_standard = SDL_CreateTextureFromSurface(s_renderer, surface_standard);
SDL_Texture *texture_thai = SDL_CreateTextureFromSurface(s_renderer, surface_thai);
SDL_Rect dst_standard = { .x = 50, .y = 50 };
SDL_Rect dst_thai = { .x = 50, .y = 200 };
TTF_SizeText(font_standard, text_standard, &dst_standard.w, &dst_standard.h);
TTF_SizeText(font_thai, text_thai, &dst_thai.w, &dst_thai.h);
SDL_SetRenderDrawColor(s_renderer, 255, 255, 255, 0);
SDL_RenderClear(s_renderer);
SDL_RenderCopy(s_renderer, texture_standard, NULL, &dst_standard);
SDL_RenderCopy(s_renderer, texture_thai, NULL, &dst_thai);
SDL_Event event;
bool leave = false;
while(!leave) {
while(SDL_PollEvent(&event)) {
if(
(event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) ||
event.type == SDL_QUIT
) {
leave = true;
break;
}
}
SDL_RenderPresent(s_renderer);
SDL_Delay(1000 / 30);
}
SDL_DestroyTexture(texture_standard);
SDL_DestroyTexture(texture_thai);
SDL_FreeSurface(surface_standard);
SDL_FreeSurface(surface_thai);
TTF_CloseFont(font_standard);
TTF_CloseFont(font_thai);
stop_sdl();
return EXIT_SUCCESS;
}
Do you have any idea of what is going on?
Thanks in advance.
