pong/src/score.c

#include <fontconfig/fontconfig.h>

#include "score.h"

static const FcChar8 *SCORE_FONT_FAMILY = "Liberation Mono";
static const FcChar8 *SCORE_FONT_STYLE = "Bold";
static TTF_Font *SCORE_FONT = NULL;
static FcChar8 *SCORE_FONT_FILE = NULL;
static const int SCORE_FONT_PTSIZE = 16;
static const SDL_Color SCORE_FONT_COLOR = { 255, 255, 255 };

Score*
Score_init(int posX, int posY) {
  Score *s = malloc(sizeof(Score));
  *(int *)&s->POSX = posX;
  *(int *)&s->POSY = posY;
  s->score = 0;

  if (SCORE_FONT == NULL) {
    FcConfig *config = FcInitLoadConfigAndFonts();
    FcPattern *pat = FcPatternCreate();
    
    FcObjectSet* os = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, (char *) 0);
    FcFontSet* fs = FcFontList(config, pat, os);
  
    FcChar8 *style, *family;
    for (int i=0; fs && i < fs->nfont; ++i) {
      FcPattern* font = fs->fonts[i];
      if (FcPatternGetString(font, FC_FILE, 0, &SCORE_FONT_FILE) == FcResultMatch
	  && FcPatternGetString(font, FC_FAMILY, 0, &family) == FcResultMatch
	  && FcPatternGetString(font, FC_STYLE, 0, &style) == FcResultMatch
	  && strcmp(SCORE_FONT_FAMILY, family) == 0
	  && strcmp(SCORE_FONT_STYLE, style) == 0) {
	break;
      }
    }
    SCORE_FONT = TTF_OpenFont(SCORE_FONT_FILE, SCORE_FONT_PTSIZE);
    FcFontSetDestroy(fs);
    FcObjectSetDestroy(os);
    FcPatternDestroy(pat);
    FcConfigDestroy(config);
    if (SCORE_FONT == NULL) {
      printf("TTF_OpenFont fail with path '%s'. TTF_Error: %s\n", SCORE_FONT_FILE, TTF_GetError());
      free(s);
      return NULL;
    }
  }

  return s;
}

void
Score_free(Score *s) {
  if (SCORE_FONT != NULL) {
    TTF_CloseFont(SCORE_FONT);
    SCORE_FONT = NULL;
  }
  free(s);
}

int
Score_render(const Score *s, SDL_Renderer *renderer) {
  char score_str[3];
  SDL_Rect scoreRect = { s->POSX , s->POSY, SCORE_WIDTH, SCORE_HEIGHT };

  sprintf(score_str, "%i", s->score);
  SDL_Surface *scoreSurface = TTF_RenderText_Solid(SCORE_FONT, score_str, SCORE_FONT_COLOR);
  if (scoreSurface == NULL) {
    printf("Text rendering failed. TTF_Error: %s\n", TTF_GetError());
    return 1;
  }
  SDL_Texture *scoreTexture = SDL_CreateTextureFromSurface(renderer, scoreSurface);
  if (scoreTexture == NULL) {
    printf("Texture rendering failed. SDL_Error: %s\n", SDL_GetError());
    SDL_FreeSurface(scoreSurface);
    return 1;
  }
  SDL_RenderCopy(renderer, scoreTexture, NULL, &scoreRect);
  
  SDL_FreeSurface(scoreSurface);
  SDL_DestroyTexture(scoreTexture);

  return 0;
}