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#include <SDL.h>
#include "digits.h"
static SDL_Texture *get_font(SDL_Renderer *rend) {
static SDL_Texture *font = NULL;
if (!font) {
font = SDL_CreateTexture(rend,
SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_STREAMING,
FONT_WIDTH, sizeof(digits) / FONT_WIDTH);
SDL_SetTextureBlendMode(font, SDL_BLENDMODE_BLEND);
SDL_assert(font);
int pitch;
void *out;
SDL_assert(SDL_LockTexture(font, NULL, &out, &pitch) >= 0);
SDL_Color *pixels = out;
for (int i = 0; i < sizeof(digits); i++) {
pixels[i] =
(SDL_Color) {0xFF, 0xFF, 0xFF, digits[i] ? 0xFF : 0x00};
}
SDL_UnlockTexture(font);
}
return font;
}
int draw_counter(SDL_Renderer *rend,
SDL_Point screen_pos, double size, SDL_Color color,
int number, int digits) {
double scale = size / FONT_HEIGHT;
SDL_Texture *font = get_font(rend);
SDL_SetTextureColorMod(font, color.r, color.g, color.b);
if (digits == 0) {
for (int n = number; n > 0; n /= DIGIT_BASE)
digits += 1;
digits = SDL_max(digits, 1);
}
int n = number;
for (int i = digits - 1; i >= 0; i--) {
int digit = n % DIGIT_BASE;
int width = (double) FONT_WIDTH * scale + 0.5;
int height = (double) FONT_HEIGHT * scale + 0.5;
int offset = (double) FONT_WIDTH * scale * (double) i + 0.5;
SDL_Rect draw = {screen_pos.x + offset, screen_pos.y, width, height};
SDL_Rect digit_rect = {
0, FONT_HEIGHT * digit, FONT_WIDTH, FONT_HEIGHT,
};
SDL_RenderCopy(rend, font, &digit_rect, &draw);
n /= DIGIT_BASE;
}
return (double) FONT_WIDTH * scale * (double) digits + 0.5;
}
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