hkzlab/TK2048
1
0
Fork 0
mirror of https://codeberg.org/hkzlab/TK2048.git synced 2025-12-25 18:32:16 +11:00
Code Issues Projects Releases Packages Wiki Activity

Add code to show partial background

Browse source
This commit is contained in:
hkz 2025-07-17 14:38:12 +02:00
commit ccf46b9afb
2 changed files with 45 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

3
Makefile
View file

@ -10,7 +10,8 @@ LIBS=clib-6502.a
# Common source files
ASM_SRCS = tk2k_startup.s
C_SRCS = main.c monitor_subroutines.c utility.c \
game_graphics.c game_logic.c input.c
game_graphics.c game_logic.c input.c \
line_data.c
# Object files
OBJS = $(ASM_SRCS:%.s=%.o) $(C_SRCS:%.c=%.o)

44
src/game_graphics.c
View file

@ -1,18 +1,60 @@
#include "game_graphics.h"
#include <string.h>
#include "mem_map.h"
#include "mem_registers.h"
#include "line_data.h"
#include "game_logic.h"
#define SCREEN_WIDTH_B 40
#define TILE_SIDE 28
#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;
// The grid is 5x5 squares,
// It is offset on the left side by 7 pixels and on the top by 14
// Every square is 28x28 pixels
void draw_game_background(void) {
void swap_display_buffers(void);
void draw_game_background(void) {
// Draw the background on display page 1
uint8_t* buf = (uint8_t*)DISPLAY_PAGE_1;
// Horizontal borders
for(uint8_t col = 0; col < GRID_SIDE * 4; 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;
}
// vertical borders
for(uint8_t col = 0; col < GRID_SIDE * 4; 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;
}
// Copy the data from display page 1 to 2
memcpy((void*)DISPLAY_PAGE_1, (void*)DISPLAY_PAGE_2, DISPLAY_PAGE_SIZE);
}
void draw_tiles(void) {
swap_display_buffers();
}
void swap_display_buffers(void) {
static uint8_t dp_counter = 0;
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);
}