keyboard input mapping

src/2048.c

@@ -1,8 +1,24 @@
 #include "2048.h"
 #include <stdlib.h>
 #include <time.h>
+#include <stdbool.h>
 
 void game_add_block(Game game) {
+
+    bool is_full = true;
+    for (int i = 0; i < game.field_size_y; i++) {
+        for (int j = 0; j < game.field_size_x; j++) {
+            if (game.field[j][i] == 0) {
+                is_full = false;
+                break;
+            }
+        }
+    }
+    if (is_full) {
+        game.game_over = true;
+        return 1;
+    }
+
     size_t x, y;
     int value;
     do {
@@ -15,6 +31,7 @@ void game_add_block(Game game) {
 
 Game game_init(size_t field_size_x, size_t field_size_y) {
     Game game;
+    game.game_over = false;
     game.field_size_x = field_size_x;
     game.field_size_y = field_size_y;
     game.score = 0;
@@ -38,7 +55,7 @@ void game_destroy(Game game) {
     game.field = NULL;
 }
 
-uint8_t game_move(Game *game, Direction direction) {
+void game_move(Game *game, Direction direction) {
     for (int i = 0; i < game->field_size_y; i++) {
         uint16_t **field = game->field;
         // move everything on one side
@@ -154,5 +171,4 @@ uint8_t game_move(Game *game, Direction direction) {
     }
 
     game_add_block(*game);
-    return 0;
 }

src/2048.h

@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdlib.h>
+#include <stdbool.h>
 
 #ifndef HEADER_2048
 #define HEADER_2048
@@ -17,10 +18,11 @@ typedef struct Game
     uint32_t score;
     size_t field_size_x, field_size_y;
     uint16_t **field;
+    bool game_over;
 } Game;
 
 Game game_init(size_t field_size_x, size_t field_size_y);
-uint8_t game_move(Game *game, Direction direction);
+void game_move(Game *game, Direction direction);
 void game_destroy(Game game);
 
 #endif

src/gui.c

@@ -49,7 +49,7 @@ void gui_init() {
     // load up textures
     tile_texture = texture_from_png("res/tile.png");
     tile_textures[0] = tile_texture;
-    tile_textures[1] = texture_from_png("res/2.png");
+    tile_textures[2] = texture_from_png("res/2.png");
     tile_textures[3] = texture_from_png("res/4.png");
     tile_textures[4] = texture_from_png("res/8.png");
     tile_textures[5] = texture_from_png("res/16.png");
@@ -69,6 +69,9 @@ void gui_destroy() {
     //Destroy window
     SDL_DestroyWindow( window );
     SDL_DestroyRenderer(window_renderer);
+    for (int i = 0; i < 13; i++) {
+        SDL_DestroyTexture(tile_textures[i]);
+    }
 
     //Quit SDL subsystems
     SDL_Quit();
@@ -83,11 +86,42 @@ void gui_loop(Game *game) {
     while(!quit) {
         while( SDL_PollEvent( &e ) != 0 )
         {
-            needs_redraw = true;
+            switch( e.type ) {
-            //User requests quit
+                /* Keyboard event */
-            if( e.type == SDL_QUIT )
+                /* Pass the event data onto PrintKeyInfo() */
-            {
+                case SDL_KEYDOWN:
-                quit = true;
+                    switch (e.key.keysym.sym) {
+                        case SDLK_h:
+                        case SDLK_LEFT:
+                        case SDLK_4:
+                            needs_redraw = true;
+                            game_move(game, Left);
+                            break;
+                        case SDLK_l:
+                        case SDLK_RIGHT:
+                        case SDLK_6:
+                            needs_redraw = true;
+                            game_move(game, Right);
+                            break;
+                        case SDLK_j:
+                        case SDLK_DOWN:
+                        case SDLK_2:
+                            needs_redraw = true;
+                            game_move(game, Down);
+                            break;
+                        case SDLK_k:
+                        case SDLK_UP:
+                        case SDLK_8:
+                            needs_redraw = true;
+                            game_move(game, Up);
+                            break;
+                    }
+                    break;
+
+                /* SDL_QUIT event (window close) */
+                case SDL_QUIT:
+                    quit = 1;
+                    break;
             }
         }
 
@@ -101,7 +135,7 @@ void gui_loop(Game *game) {
                     
                     // get texture index from  value
                     for (int k = 0; k < 13; k++) {
-                        if (!(game->field[i][j] >> k)) {
+                        if (!(game->field[j][i] >> k)) {
                             SDL_RenderCopy( window_renderer, tile_textures[k], NULL, &tile_rect);
                             break;
                         }
@@ -109,6 +143,9 @@ void gui_loop(Game *game) {
                     // SDL_RenderCopy( window_renderer, tile_texture, NULL, &tile_rect);
                 }
             }
+            if (game->game_over) {
+                // render game over screen
+            }
             SDL_RenderPresent(window_renderer);
             needs_redraw = false;
         }