Adding chess Peice sprites

chess_board.cpp

@@ -2,29 +2,101 @@
 #include <SDL.h>
 #include <SDL_video.h>
 #include "stdio.h"
+#include <stack>
+#include <string.h>
 
 #define MARGIN 200
 
-typedef enum 
-{
-    SQUARE_EMPTY = 0,
-    KING,
-    QUEEN,
-    ROOK,
-    KNIGHT,
-    BISHOP,
-    PAWN
-};
+#define PAWN_WHITE      0u
+#define PAWN_BLACK      1u
+#define KING_WHITE      2u
+#define KING_BLACK      3u
+#define QUEEN_WHITE     4u
+#define QUEEN_BLACK     5u
+#define ROOK_WHITE      6u
+#define ROOK_BLACK      7u
+#define KNIGHT_WHITE    8u
+#define KNIGHT_BLACK    9u
+#define BISHOP_WHITE    10u
+#define BISHOP_BLACK    11u
+#define SQUARE_EMPTY    12u
+#define SQUARE_SHIFT    4u
+
+#define POTENTIAL_MOVE  (1u << SQUARE_SHIFT)
+#define POTENTIAL_TAKE  (2u << SQUARE_SHIFT)
+#define SUGGESTED_MOVE  (3u << SQUARE_SHIFT)
+#define CHEATING_MOVE   (4u << SQUARE_SHIFT)
+
+const char file_names[12][16] = {"pawn_white.bmp", "pawn_black.bmp",
+                                    "king_white.bmp", "king_black.bmp",
+                                    "queen_white.bmp", "queen_black.bmp",
+                                    "rook_white.bmp", "rook_black.bmp",
+                                    "horse_white.bmp", "horse_black.bmp",
+                                    "tower_white.bmp", "tower_black.bmp"};
 
 static int height;
 static int width;
-static SDL_Texture *board_texture;
+static SDL_Texture * board_texture;
 static SDL_Rect rectangle;
 static int board_width;
-uint8_t board_state[8][8] = 0u;
+uint8_t board_state[8][8];
+SDL_Surface *bitmapSurface = NULL;
+SDL_Texture * bitmapTextures[12] = {NULL};
+std::stack<uint8_t> selected_peices;
 
+void pawn_move(uint8_t row, uint8_t column)
+{
+    if((0x0Fu & board_state[row][column]) == SQUARE_EMPTY)
+    {
+        board_state[row][column] = (uint8_t)((POTENTIAL_MOVE) | (board_state[row][column] & 0x0Fu));
+    }
+}
 
-bool click(SDL_Renderer *p_renderer, int x, int y)
+void pawn_take(uint8_t row, uint8_t column)
+{
+    if ((0x0Fu & board_state[row][column]) < SQUARE_EMPTY)
+    {
+        board_state[row][column] = (uint8_t)((POTENTIAL_TAKE) | (board_state[row][column] & 0x0Fu));
+    }
+}
+
+void Mark_Potential_Moves(uint8_t peice, uint8_t column, uint8_t row)
+{
+    switch (peice)
+    {
+        case PAWN_WHITE :
+            if (row == 6)
+            {
+                pawn_move(row - 2, column);
+            }
+            pawn_move(row - 1, column);
+            if(column >= 1)
+            {
+                pawn_take(row - 1, column - 1);
+            }
+            if (column <= 6)
+            {
+                pawn_take(row - 1, column + 1);
+            }
+            
+            break;
+        case PAWN_BLACK:
+            if (row == 1)
+            {
+                board_state[row + 2][column] = (uint8_t)((POTENTIAL_MOVE) | (board_state[row + 2][column] & 0x0Fu));
+            }
+            board_state[row + 1][column] = (uint8_t)((uint8_t)(POTENTIAL_MOVE) | (uint8_t)(board_state[row + 1][column] & 0x0Fu));
+            break;
+        case ROOK_WHITE:
+        case ROOK_BLACK:
+            break;  
+
+        default:
+            break;
+    }
+}
+
+bool click(SDL_Renderer *p_renderer, int x, int y, bool pick_up)
 {
     SDL_Point const point = {x, y};
     bool ret_val = false;
@@ -45,6 +117,21 @@ bool click(SDL_Renderer *p_renderer, int x, int y)
             {
                 if(SDL_PointInRect(&point, &rectangle))
                 {
+                    if (pick_up && (board_state[j][i] < SQUARE_EMPTY))
+                    {
+                        selected_peices.push(board_state[j][i]);
+                        Mark_Potential_Moves(board_state[j][i], i, j);
+                        board_state[j][i] = SQUARE_EMPTY;
+                    }
+                    else if (!selected_peices.empty() && (board_state[j][i] >= SQUARE_EMPTY))
+                    {
+                        board_state[j][i] = selected_peices.top();
+                        selected_peices.pop();
+                    }
+                    else
+                    {
+                        /* code */
+                    }
             
                     goto draw_square;
                 }
@@ -54,28 +141,72 @@ bool click(SDL_Renderer *p_renderer, int x, int y)
         }
         draw_square:
         SDL_SetRenderTarget(p_renderer, board_texture);
-        SDL_SetRenderDrawColor(p_renderer, 0x00, 0xFF, 0x00, 0x00);
-        SDL_RenderDrawRect(p_renderer, &rectangle);
-        SDL_RenderFillRect(p_renderer, &rectangle);
-        SDL_SetRenderTarget(p_renderer, NULL);
+        //SDL_SetRenderDrawColor(p_renderer, 0x00, 0xFF, 0x00, 0x00);
+        //SDL_RenderDrawRect(p_renderer, &rectangle);
+        //SDL_RenderFillRect(p_renderer, &rectangle);
+        //SDL_SetRenderTarget(p_renderer, NULL);
+        draw_board(p_renderer);
         SDL_RenderCopy(p_renderer, board_texture, NULL, NULL);
         SDL_RenderPresent(p_renderer);
     }
     return ret_val;
 }
 
-void chess_board_init(SDL_Renderer *p_renderer, int w, int h)
+void chess_board_resize(SDL_Renderer *p_renderer, int w, int h)
 {
     width = w;
     height = h;
     SDL_DestroyTexture(board_texture);
     board_texture = SDL_CreateTexture(p_renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h);
-    board_width = ((w > h) ? h : w ) - MARGIN;
-
+    board_width = ((w > h) ? h : w) - MARGIN;
     // get rid of rounding errors
     board_width -= board_width % 8;
 }
 
+void chess_board_init(SDL_Renderer *p_renderer)
+{   
+    for (uint8_t i = 0; i < 8; i++)
+    {
+        for (uint8_t j = 0; j < 8; j++)
+        {
+            board_state[i][j] = SQUARE_EMPTY;
+        }
+        
+    }
+    
+    //Place black peices
+    board_state[0][0] = BISHOP_BLACK;
+    board_state[0][7] = BISHOP_BLACK;
+    board_state[0][1] = KNIGHT_BLACK;
+    board_state[0][6] = KNIGHT_BLACK;
+    board_state[0][2] = ROOK_BLACK;
+    board_state[0][5] = ROOK_BLACK;
+    board_state[0][3] = QUEEN_BLACK;
+    board_state[0][4] = KING_BLACK;
+    board_state[7][0] = BISHOP_WHITE;
+    board_state[7][7] = BISHOP_WHITE;
+    board_state[7][1] = KNIGHT_WHITE;
+    board_state[7][6] = KNIGHT_WHITE;
+    board_state[7][2] = ROOK_WHITE;
+    board_state[7][5] = ROOK_WHITE;
+    board_state[7][3] = QUEEN_WHITE;
+    board_state[7][4] = KING_WHITE;
+    for (uint8_t i = 0; i < 8; i++)
+    {
+        board_state[1][i] = PAWN_BLACK;
+        board_state[6][i] = PAWN_WHITE;
+    }
+    for (uint8_t i = 0; i < 12; i++)
+    {
+        //location of all the sprites plus the size of file names
+        char file[25] = "sprites\\";
+        memcpy(&file[8], file_names[i], 16);
+        bitmapSurface = SDL_LoadBMP(file);
+        bitmapTextures[i] = SDL_CreateTextureFromSurface(p_renderer, bitmapSurface);
+    }
+    SDL_FreeSurface(bitmapSurface);
+}
+
 void draw_board(SDL_Renderer *p_renderer)
 {
     SDL_SetRenderTarget(p_renderer, board_texture);
@@ -88,7 +219,7 @@ void draw_board(SDL_Renderer *p_renderer)
     rectangle.x = (width - board_width) / 2;
     rectangle.y = (height - board_width) / 2;
     SDL_RenderFillRect(p_renderer, &rectangle);
-    SDL_SetRenderDrawColor(p_renderer, 0, 0, 0, 0x00);
+    SDL_SetRenderDrawColor(p_renderer, 0x85, 0x5E, 0x42, 0x00);
     int square_size = board_width / 8;
     int starting_x = rectangle.x;
     rectangle.w = square_size;
@@ -96,15 +227,36 @@ void draw_board(SDL_Renderer *p_renderer)
     for (size_t j = 0; j < 8; j++)
     {
         rectangle.x = starting_x;
-        if ((j % 2) == 0)
+        for (size_t i = 0; i < 8; i++)
         {
+            if((board_state[j][i] & 0xF0u) == POTENTIAL_MOVE)
+            {
+                SDL_SetRenderDrawColor(p_renderer, 0x00, 0xFF, 0x00, 0x00);
+                SDL_RenderFillRect(p_renderer, &rectangle);
+                SDL_SetRenderDrawColor(p_renderer, 0x85, 0x5E, 0x42, 0x00);
+            }
+            else if ((board_state[j][i] & 0xF0u) == POTENTIAL_TAKE)
+            {
+                SDL_SetRenderDrawColor(p_renderer, 0xFF, 0x00, 0x00, 0x00);
+                SDL_RenderFillRect(p_renderer, &rectangle);
+                SDL_SetRenderDrawColor(p_renderer, 0x85, 0x5E, 0x42, 0x00);
+            }
+            else if (((i % 2) + (j % 2))  == 1)
+            {
+                SDL_RenderFillRect(p_renderer, &rectangle);
+            }
+            else
+            {
+                /* code */
+            }
+            
+            if((board_state[j][i] & 0x0Fu) != SQUARE_EMPTY)
+            {
+                SDL_RenderCopy(p_renderer, bitmapTextures[(board_state[j][i] & 0x0Fu)], NULL, &rectangle);
+            }
+
             rectangle.x += square_size;
         }
-        for (size_t i = 0; i < 4; i++)
-        {
-            SDL_RenderFillRect(p_renderer, &rectangle);
-            rectangle.x += 2 * square_size;
-        }
         rectangle.y += square_size;
     }
     

chess_board.h

@@ -1,6 +1,7 @@
 #include <SDL.h>
 #include <SDL_video.h>
 
-bool click(SDL_Renderer *p_renderer, int x, int y);
-void chess_board_init(SDL_Renderer *p_renderer, int w, int h);
+bool click(SDL_Renderer *p_renderer, int x, int y, bool pick_up);
+void chess_board_resize(SDL_Renderer *p_renderer, int w, int h);
+void chess_board_init(SDL_Renderer *p_renderer);
 void draw_board(SDL_Renderer * p_renderer);

main.cpp

@@ -48,7 +48,8 @@ int main( int argc, const char* argv[] )
     srcR.w = 800;
     destR.h = 800;
     destR.w = 800;
-    chess_board_init(renderer, 800, 800);
+    chess_board_resize(renderer, 800, 800);
+    chess_board_init(renderer);
     srcR.x = 0;
     srcR.y = 0;
     destR.x = 0;
@@ -70,7 +71,11 @@ int main( int argc, const char* argv[] )
                 }
                 else if (event.button.button == SDL_BUTTON_LEFT) // scroll up
                 {
-                    redraw = click(renderer, event.button.x, event.button.y);
+                    redraw = click(renderer, event.button.x, event.button.y, true);
+                }
+                else if (event.button.button == SDL_BUTTON_RIGHT) // scroll up
+                {
+                    redraw = click(renderer, event.button.x, event.button.y, false);
                 }
                 else
                 {
@@ -98,7 +103,7 @@ int main( int argc, const char* argv[] )
                 case SDL_WINDOWEVENT_MAXIMIZED:
                     redraw = true;
                     SDL_GetWindowSize(win, &destR.w, &destR.h);
-                    chess_board_init(renderer, destR.w, destR.h);
+                    chess_board_resize(renderer, destR.w, destR.h);
                     break;
                 }
             }