From 8fb45612a86f418c40abe199e91a43713ac06e03 Mon Sep 17 00:00:00 2001
From: hkz <tabaglio@posteo.net>
Date: Thu, 17 Jul 2025 21:21:23 +0200
Subject: [PATCH] Temporary drawing of the game board

---
 src/game_graphics.c | 35 ++++++++++++++++++++++++-----------
 src/main.c          |  2 ++
 2 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/src/game_graphics.c b/src/game_graphics.c
index 34fe95b..51205c7 100644
--- a/src/game_graphics.c
+++ b/src/game_graphics.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 
+#include "utility.h"
 #include "mem_map.h"
 #include "mem_registers.h"
 #include "line_data.h"
@@ -10,14 +11,14 @@
 #define SCREEN_WIDTH_B 40
 #define TILE_SIDE 35
 
-#define TOP_OFFSET 11 // Top is offset by 11 lines
+#define TOP_OFFSET 14 // Top is offset by 14 lines
 #define LEFT_OFFSET_B 1 // Left is offset by 1 bytes (7 pixels)
 
 static uint8_t *front_buf = (uint8_t*)DISPLAY_PAGE_1;
-static uint8_t *back_buf = (uint8_t*)DISPLAY_PAGE_1;
+static uint8_t *back_buf = (uint8_t*)DISPLAY_PAGE_2;
 
 // The grid is 5x5 squares,
-// It is offset on the left side by 7 pixels and on the top by 11
+// It is offset on the left side by 7 pixels and on the top by 14
 // Every square is 35x35 pixels
 
 void swap_display_buffers(void);
@@ -28,12 +29,12 @@ void draw_game_background(void) {
 	
 	// Horizontal borders
 	for(uint8_t col = 0; col < GRID_SIDE * (TILE_SIDE/7); col++) {
-		buf[line_offset_map[TOP_OFFSET] + col + LEFT_OFFSET_B] = 0x7F;
-		buf[line_offset_map[TOP_OFFSET + (TILE_SIDE * GRID_SIDE)] + col + LEFT_OFFSET_B] = 0x7F;		
+		buf[line_offset_map[TOP_OFFSET - 1] + col + LEFT_OFFSET_B] = 0x7F;
+		buf[line_offset_map[TOP_OFFSET + (TILE_SIDE * GRID_SIDE) + 1] + col + LEFT_OFFSET_B] = 0x7F;		
 	}
 
-	// TODO vertical borders
-	for(uint8_t row = 1; row < TILE_SIDE * GRID_SIDE; row++) { // Skipping one at the top
+	// Vertical borders
+	for(uint8_t row = 0; row < (TILE_SIDE * GRID_SIDE) + 1; row++) {
 		buf[line_offset_map[row + TOP_OFFSET] + LEFT_OFFSET_B - 1] = 0x40;
 		buf[line_offset_map[row + TOP_OFFSET] + LEFT_OFFSET_B + (GRID_SIDE * (TILE_SIDE/7))] = 0x01;
 	}
@@ -44,17 +45,29 @@ void draw_game_background(void) {
 }
 
 void draw_tiles(void) {
+	uint8_t* grid = get_front_grid();
+	
+	// Clear the grid so we'll be able to draw the boxes on
+	clear_box(GRID_SIDE * (TILE_SIDE/7), GRID_SIDE * TILE_SIDE, LEFT_OFFSET_B, TOP_OFFSET + 1, back_buf);
 
+
+	for (uint8_t tile = 0; tile < GRID_SIDE * GRID_SIDE; tile++) {
+		if(grid[tile]) {
+			uint8_t col = tile % GRID_SIDE;
+			uint8_t row = tile / GRID_SIDE;
+			
+			back_buf[line_offset_map[TOP_OFFSET + 15 + row * TILE_SIDE] + LEFT_OFFSET_B + 2 + (col * 5)] = grid[tile];
+		}
+	}
+	
 	swap_display_buffers();
 }
 
-void swap_display_buffers(void) {
-	static uint8_t dp_counter = 0;
-	
+void swap_display_buffers(void) {	
 	uint8_t *temp = front_buf;
 	front_buf = back_buf;
 	back_buf = temp;
 	
 	// Show the current buffer
-	PEEK((dp_counter++ & 0x01) ? IO_DISPLAY_PAGE1 : IO_DISPLAY_PAGE2);
+	PEEK(((uint16_t)front_buf == DISPLAY_PAGE_1) ? IO_DISPLAY_PAGE1 : IO_DISPLAY_PAGE2);
 }
diff --git a/src/main.c b/src/main.c
index 3eeb290..76158ae 100644
--- a/src/main.c
+++ b/src/main.c
@@ -33,7 +33,9 @@ __task int main(void) {
 		
 	while(1){ // Outer loop
 		reset_game();
+		
 		draw_game_background();
+		draw_tiles();
 
 		while(1) { // Game loop
 			lfsr_update();