feat: add dracula color macros

src/main.c

@@ -7,77 +7,73 @@
 static SDL_Window *window = NULL;
 static SDL_Renderer *renderer = NULL;
 
-static int window_width = 640;
-static int window_height = 480;
-static int grid_width = 32;
-static int grid_height = 24;
+#define WINDOW_WIDTH 640
+#define WINDOW_HEIGHT 480
+#define GRID_PADDING 2
+#define GRID_WIDTH 20
+#define GRID_HEIGHT 20
 
-static Uint64 last;
+enum GRID_TILES { EMPTY, SNAKE, FRUIT };
+enum SNAKE_PARTS { TAIL, BODY, HEAD };
 
-enum TILES { EMPTY, SNAKE, FRUIT };
-enum PARTS { TAIL, HEAD, BODY };
+#define COLOR_SNAKE 80, 250, 123, SDL_ALPHA_OPAQUE
+#define COLOR_FRUIT 255, 85, 85, SDL_ALPHA_OPAQUE
+#define COLOR_EMPTY 40, 42, 54, SDL_ALPHA_OPAQUE
+#define COLOR_BG 68, 71, 90, SDL_ALPHA_OPAQUE
 
 typedef enum DIRECTION { LEFT, RIGHT, UP, DOWN } DIRECTION;
 
+typedef struct Snake {
+  DIRECTION direction;
+  int length;
+} Snake;
+
 typedef struct State {
-  int *grid;
-  DIRECTION player_face;
-  SDL_FRect *r;
+  int grid[GRID_HEIGHT * GRID_WIDTH];
+  Snake *player;
 } State;
 
+#define SET_GRID_AT(grid, row, col, value) grid[row * GRID_WIDTH + col] = value
+#define GET_GRID_AT(grid, row, col) grid[row * GRID_WIDTH + col]
+
 void log_game_grid(int *game_grid) {
-  char *buf = SDL_malloc(sizeof(char) * grid_width * 2);
-  for (int i = 0; i < grid_height; i++) {
-    for (int j = 0; j < grid_width; j++) {
-      buf[2 * j] = '0' + game_grid[i * grid_width + j];
+  char buf[GRID_WIDTH * 2];
+  for (int i = 0; i < GRID_HEIGHT; i++) {
+    for (int j = 0; j < GRID_WIDTH; j++) {
+      buf[2 * j] = '0' + GET_GRID_AT(game_grid, i, j);
       buf[2 * j + 1] = ' ';
     }
-    buf[2 * grid_width] = '\0';
+    buf[2 * GRID_WIDTH - 1] = '\0';
     SDL_Log("%s", buf);
   }
-  SDL_free(buf);
 }
 
-void set_grid_at(int *grid, int row, int col, int value) { grid[row * grid_width + col] = value; }
-
-int get_grid_at(int *grid, int row, int col) { return grid[row * grid_width + col]; }
-
 SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
   if (!SDL_Init(SDL_INIT_VIDEO)) {
     SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
     return SDL_APP_FAILURE;
   }
 
-  if (!SDL_CreateWindowAndRenderer("examples/renderer/clear", window_width, window_height, 0,
-                                   &window, &renderer)) {
+  if (!SDL_CreateWindowAndRenderer("SnakeDL3", WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window,
+                                   &renderer)) {
     SDL_Log("Couldn't create window/renderer: %s", SDL_GetError());
     return SDL_APP_FAILURE;
   }
 
-  int *game_grid = SDL_malloc(sizeof(int) * grid_width * grid_height);
-  for (int i = 0; i < grid_height; i++) {
-    for (int j = 0; j < grid_width; j++) {
-      set_grid_at(game_grid, i, j, EMPTY);
-    }
-  }
-
-  set_grid_at(game_grid, 12, 16, SNAKE);
-  set_grid_at(game_grid, 4, 12, FRUIT);
-  set_grid_at(game_grid, 18, 5, FRUIT);
-
-  SDL_FRect *rect2 = SDL_malloc(sizeof(SDL_FRect));
-  rect2->y = 240;
-  rect2->x = 0;
-  rect2->w = 100;
-  rect2->h = 100;
-
   State *state = SDL_malloc(sizeof(State));
-  state->grid = game_grid;
-  state->player_face = UP;
-  state->r = rect2;
-  *appstate = state;
+  if (!state) {
+    SDL_Log("Failed to allocate state");
+    return SDL_APP_FAILURE;
+  }
+  SDL_memset(state->grid, EMPTY, sizeof(state->grid));
 
-  last = SDL_GetTicksNS();
+  SET_GRID_AT(state->grid, GRID_WIDTH / 2, GRID_HEIGHT / 2, SNAKE);
+  SET_GRID_AT(state->grid, 4, 12, FRUIT);
+  SET_GRID_AT(state->grid, 18, 5, FRUIT);
+
+  log_game_grid(state->grid);
+
+  *appstate = state;
 
   return SDL_APP_CONTINUE;
 }
@@ -93,47 +89,40 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
 SDL_AppResult SDL_AppIterate(void *appstate) {
   State *stateptr = appstate;
   int *game_grid = stateptr->grid;
-  Uint64 delta = SDL_GetTicksNS() - last;
-  double duration = (double)delta / (FPS * 1000);
 
-  SDL_SetRenderDrawColorFloat(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE_FLOAT);
+  SDL_SetRenderDrawColor(renderer, COLOR_BG);
   SDL_RenderClear(renderer);
 
   SDL_FRect rect;
-  rect.w = (float)window_width / grid_width;
-  rect.h = (float)window_height / grid_height;
-  for (int i = 0; i < grid_height; i++) {
-    for (int j = 0; j < grid_width; j++) {
-      switch (get_grid_at(game_grid, i, j)) {
+  rect.w = (float)(WINDOW_WIDTH - 2 * GRID_PADDING) / GRID_WIDTH;
+  rect.h = (float)(WINDOW_HEIGHT - 2 * GRID_PADDING) / GRID_HEIGHT;
+  for (int i = 0; i < GRID_HEIGHT; i++) {
+    for (int j = 0; j < GRID_WIDTH; j++) {
+      switch (GET_GRID_AT(game_grid, i, j)) {
       case EMPTY:
-        SDL_SetRenderDrawColorFloat(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE_FLOAT);
+        SDL_SetRenderDrawColor(renderer, COLOR_EMPTY);
         break;
       case SNAKE:
-        SDL_SetRenderDrawColorFloat(renderer, 255, 255, 255, SDL_ALPHA_OPAQUE_FLOAT);
+        SDL_SetRenderDrawColor(renderer, COLOR_SNAKE);
         break;
       case FRUIT:
-        SDL_SetRenderDrawColorFloat(renderer, 255, 0, 0, SDL_ALPHA_OPAQUE_FLOAT);
+        SDL_SetRenderDrawColor(renderer, COLOR_FRUIT);
         break;
       }
-      rect.x = j * rect.w;
-      rect.y = i * rect.h;
+      rect.x = j * rect.w + GRID_PADDING;
+      rect.y = i * rect.h + GRID_PADDING;
+      // SDL_Log("x: %f, y: %f, w: %f, h: %f", rect.x, rect.y, rect.w, rect.h);
       SDL_RenderFillRect(renderer, &rect);
     }
   }
-
-  SDL_FRect *rect2 = stateptr->r;
-  rect2->x += 5 * (double)delta / 1000000;
-  SDL_Log("%f %f %f %f", rect2->x, rect2->y, rect2->w, rect2->h);
-  SDL_SetRenderDrawColorFloat(renderer, 0, 255, 0, SDL_ALPHA_OPAQUE_FLOAT);
-  SDL_RenderFillRect(renderer, rect2);
+  // SDL_Log("---");
 
   SDL_RenderPresent(renderer);
 
-  last = SDL_GetTicksNS();
-
   return SDL_APP_CONTINUE;
 }
 
 void SDL_AppQuit(void *appstate, SDL_AppResult result) {
   /* SDL will clean up the window/renderer for us. */
+  SDL_free(appstate);
 }