1 files changed, 59 insertions, 6 deletions

diff --git a/apps/chess.c b/apps/chess.c
index d339534..3c4c0c3 100644
--- a/apps/chess.c
+++ b/apps/chess.c
@@ -1,14 +1,54 @@
 // MIT License, Copyright (c) 2021 Marvin Borner
+// Ugly chess implementation to find the limits of libgui
+// Asserts are generally not needed but don't hurt either
 
 #include <assert.h>
 #include <libgui/gui.h>
 #include <print.h>
 
 #define SIZE 8
-#define TILE 24
+#define TILE 36
 #define WHITE_STARTS 1
 
-typedef u32 board[SIZE][SIZE];
+#define DARK_COLOR 0xff946f51
+#define LIGHT_COLOR 0xfff0d9b5
+
+// Pieces
+#define NONE 0
+#define KING 1
+#define PAWN 2
+#define KNIGHT 3
+#define BISHOP 5
+#define ROOK 6
+#define QUEEN 7
+#define WHITE 8
+#define BLACK 16
+
+// Masks
+#define TYPE_MASK 7
+#define BLACK_MASK BLACK
+#define WHITE_MASK WHITE
+#define COLOR_MASK (WHITE_MASK | BLACK_MASK)
+
+// Macros
+#define COLOR(piece) (piece & COLOR_MASK)
+#define IS_COLOR(piece, color) (COLOR(piece) == color)
+#define TYPE(piece) (piece & TYPE_MASK)
+#define IS_ROOK_OR_QUEEN(piece) ((piece & 6) == 6)
+#define IS_BISHOP_OR_QUEEN(piece) ((piece & 5) == 5)
+#define IS_SLIDING_PIECE(piece) ((piece & 4) != 0)
+
+struct piece {
+	u32 piece;
+	u32 widget;
+	const char *icon;
+	struct {
+		u8 moved : 1;
+		// idk
+	} bits;
+};
+
+typedef struct piece board[SIZE][SIZE];
 
 static u32 win = 0; // Window
 static board tiles = { 0 }; // Matrix
@@ -20,8 +60,8 @@ static void mouseclick(u32 widget_id, vec2 pos)
 
 	u32 x = widget_id / SIZE;
 	u32 y = (widget_id % SIZE) - 1;
-	u32 widget = tiles[x][y];
-	assert(gui_fill(win, widget, COLOR_MAGENTA) == EOK);
+	u32 widget = tiles[x][y].widget;
+	assert(gui_fill(win, widget, GUI_LAYER_BG, COLOR_MAGENTA) == EOK);
 	gui_redraw_widget(win, widget);
 }
 
@@ -32,14 +72,27 @@ static void create_board(void)
 		for (u8 y = 0; y < 8; y++) {
 			widget = gui_new_widget(win, vec2(TILE, TILE), vec2(TILE * x, TILE * y));
 			assert(widget > 0);
-			tiles[x][y] = widget;
 
 			u8 colored = (x + y + 1) % 2 == 0;
+			u8 colored_piece = y < SIZE / 2;
 #if !WHITE_STARTS
 			colored = !colored;
+			colored_piece = !colored_piece;
 #endif
 
-			assert(gui_fill(win, widget, colored ? COLOR_BLACK : COLOR_WHITE) == EOK);
+			struct piece *tile = &tiles[x][y];
+			tile->piece |= colored_piece ? BLACK : WHITE;
+			tile->widget = widget;
+			tile->icon = "/icons/chess-king-36.png";
+
+			assert(gui_fill(win, widget, GUI_LAYER_BG,
+					colored ? DARK_COLOR : LIGHT_COLOR) == EOK);
+
+			enum gfx_filter filter =
+				colored_piece ? GFX_FILTER_NONE : GFX_FILTER_INVERT;
+			assert(gui_load_image_filter(win, widget, GUI_LAYER_FG, vec2(0, 0),
+						     vec2(TILE, TILE), filter, tile->icon) == EOK);
+
 			assert(gui_listen_widget(win, widget, GUI_LISTEN_MOUSECLICK,
 						 (u32)mouseclick) == EOK);
 		}