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Add tiles

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This commit is contained in:
hkz 2025-07-17 23:37:08 +02:00
commit 4c6f4932e5
17 changed files with 60 additions and 8 deletions
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19
src/game_graphics.c
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@ -7,11 +7,12 @@
#include "mem_registers.h"
#include "line_data.h"
#include "game_logic.h"
#include "tiles.h"
#define SCREEN_WIDTH_B 40
#define TILE_SIDE 35
#define TOP_OFFSET 14 // Top is offset by 14 lines
#define TOP_OFFSET 7
#define LEFT_OFFSET_B 1 // Left is offset by 1 bytes (7 pixels)
static uint8_t *front_buf = (uint8_t*)DISPLAY_PAGE_1;
@ -28,15 +29,15 @@ void draw_game_background(void) {
uint8_t* buf = (uint8_t*)DISPLAY_PAGE_1;
// Horizontal borders
for(uint8_t col = 0; col < GRID_SIDE * (TILE_SIDE/7); col++) {
for(uint8_t col = 0; col < (GRID_SIDE * (TILE_SIDE/7)) + 1; col++) {
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;
buf[line_offset_map[TOP_OFFSET + (TILE_SIDE * GRID_SIDE) + 7] + col + LEFT_OFFSET_B] = 0x7F;
}
// Vertical borders
for(uint8_t row = 0; row < (TILE_SIDE * GRID_SIDE) + 1; row++) {
for(uint8_t row = 0; row < (TILE_SIDE * GRID_SIDE) + 7; 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;
buf[line_offset_map[row + TOP_OFFSET] + LEFT_OFFSET_B + (GRID_SIDE * (TILE_SIDE/7)) + 1] = 0x01;
}
// Copy the data from display page 1 to 2
@ -48,15 +49,19 @@ 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);
clear_box(GRID_SIDE * (TILE_SIDE/7) + 1, (GRID_SIDE * TILE_SIDE) + 6, LEFT_OFFSET_B, TOP_OFFSET + 1, back_buf);
for (uint8_t tile = 0; tile < GRID_SIDE * GRID_SIDE; tile++) {
if(grid[tile]) {
const uint8_t *tile_data = tiles + (TILE_WIDTH_BYTES * TILE_HEIGHT * (grid[tile] - 1));
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];
for(uint8_t h = 0; h < TILE_HEIGHT; h++) {
memcpy(back_buf + line_offset_map[TOP_OFFSET + 7 + (row * TILE_SIDE) + h] + LEFT_OFFSET_B + 1 + (col * TILE_SIDE/7),
tile_data + (TILE_WIDTH_BYTES * h), TILE_WIDTH_BYTES);
}
}
}