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Temporary drawing of the game board

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hkz 2025-07-17 21:21:23 +02:00
commit 8fb45612a8
2 changed files with 26 additions and 11 deletions
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35
src/game_graphics.c
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@ -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);
}

2
src/main.c
View file

@ -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();