domino-dungeon/game.c

#include <GLFW/glfw3.h>
#include <stdint.h>
#include <stdio.h>

#include "game.h"
#include "assets/dominos.h"

#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define CLAMP(x,a,b) (MIN(MAX(x,a),b))

int mouse_x = 0, mouse_y = 0;
int eyes_front = 0, eyes_back = 0;

void key_callback(int key, int scancode, int action, int mods) {
  if (action != GLFW_PRESS) return;
  switch (key) {
    case GLFW_KEY_ENTER:
      break;
    case GLFW_KEY_BACKSPACE:
      break;
  }
}

void cursor_position_callback(int xpos, int ypos) {
  mouse_x = xpos;
  mouse_y = ypos;
}

void mouse_button_callback(int button, int action, int mods) {
  printf("click!\n");

  if (button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS) {
    if (++eyes_back >= NUM_DOMINO_X) {
      eyes_back = 0;
      eyes_front = (eyes_front+1)%NUM_DOMINO_Y;
    }
  }
}

void draw_image(decoded_image img) {
  for (int i = 0; i < img.buf_size; i++) img.buf[i] = i;

  for (int y = 0; y < DOMINO_HEIGHT; y++) {
    for (int x = 0; x < DOMINO_WIDTH; x++) {
      img.buf[(CLAMP(mouse_y, 0, img.height) + y) * img.width + CLAMP(mouse_x, 0, img.width) + x] =
        (*(uint32_t*) &domino[eyes_front][eyes_back][y * DOMINO_WIDTH * BYTES_PER_PIXEL + x * BYTES_PER_PIXEL]);
    }
  }
}