#include "EGA8x8.h"

#include <SDL.h>

SDL_Texture *load_font(SDL_Renderer *renderer) {
    SDL_Surface *s = SDL_LoadBMP_RW(SDL_RWFromConstMem(font_data, font_data_len), 1);
    SDL_SetColorKey(s, SDL_TRUE, SDL_MapRGB(s->format, 255, 0, 255));
    SDL_Texture *font_texture = SDL_CreateTextureFromSurface(renderer, s);
    SDL_FreeSurface(s);
    return font_texture;
}

void draw_text(SDL_Renderer *renderer, SDL_Texture *font,
    char *text, size_t len, int x, int y, uint8_t r, uint8_t g, uint8_t b) {
    if (font == NULL) return;
    SDL_SetTextureColorMod(font, r, g, b);    
    SDL_Rect src = { .w = font_w, .h = font_h },
             dst = { .x = x, .y = y, .w = font_w, .h = font_h };
    for (size_t i = 0; i < len; i++) {
        char c = text[i];
        if (c == 0) break;
        if (c == '\n') {
            dst.x = x;
            dst.y += font_h;
            continue;
        }
        src.x = (c & 0xf) * font_w;
        src.y = (c >> 4) * font_h;
        SDL_RenderCopy(renderer, font, &src, &dst);
        dst.x += font_w;
    }
    
}