參考資訊:
https://wiki.libsdl.org/FrontPage
main.c
#include <stdio.h> #include <stdlib.h> #include <SDL.h> #include <SDL_ttf.h> int main(int argc, char **argv) { const int w = 320; const int h = 240; const int bpp = 16; SDL_Window *window = NULL; SDL_Surface *screen = NULL; SDL_Texture *texture = NULL; SDL_Renderer *renderer = NULL; SDL_Init(SDL_INIT_VIDEO); window = SDL_CreateWindow("main", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, SDL_WINDOW_SHOWN); renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC); screen = SDL_CreateRGBSurface(0, w, h, bpp, 0, 0, 0, 0); texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGB565, SDL_TEXTUREACCESS_STREAMING, w, h); TTF_Init(); TTF_Font *font = TTF_OpenFont("font.ttf", 30); SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0x00, 0x00, 0x00)); int ww = 0, hh = 0; SDL_Color col = {0, 255, 0}; SDL_Rect rt = {0, 100, 0, 0}; const char *cc = "司徒的教學網站"; TTF_SizeUTF8(font, cc, &ww, &hh); rt.x = (w - ww) / 2; SDL_Surface *msg = TTF_RenderUTF8_Solid(font, cc, col); SDL_BlitSurface(msg, NULL, screen, &rt); SDL_FreeSurface(msg); SDL_UpdateTexture(texture, NULL, screen->pixels, screen->pitch); SDL_RenderClear(renderer); SDL_RenderCopy(renderer, texture, NULL, NULL); SDL_RenderPresent(renderer); SDL_Delay(3000); TTF_CloseFont(font); TTF_Quit(); SDL_FreeSurface(screen); SDL_DestroyTexture(texture); SDL_DestroyRenderer(renderer); SDL_DestroyWindow(window); SDL_Quit(); return 0; }
編譯、執行
$ gcc main.c -o main -lSDL2 -lSDL2_ttf -I/usr/include/SDL2 $ ./main