Leahnaya/GBA_MultiMenu
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GBA_MultiMenu/source/main.c
Lesserkuma 3e0a6e89cb 1.1
2024-02-16 13:55:23 +01:00

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/*
GBA Multi Game Menu
Author: Lesserkuma (github.com/lesserkuma)
*/
#include <gba.h>
#include <gba_console.h>
#include <gba_video.h>
#include <gba_interrupt.h>
#include <gba_input.h>
#include <gba_dma.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "version.h"
#include "main.h"
#include "font.h"
#include "flash.h"
extern FontSpecs sFontSpecs;
extern u16 FallbackCharacter;
extern u16 ArrowCharacter;
extern s8 FontMarginTop;
extern s8 FontMarginBottom;
extern const u8* font;
extern u8 *itemlist;
extern u8 flash_type;
extern u16 itemlist_offset;
extern u32 flash_sector_size;
extern u32 flash_itemlist_sector_offset;
extern u32 flash_status_sector_offset;
extern u32 flash_save_sector_offset;
extern u8 data_buffer[0x10000];
ItemConfig sItemConfig;
FlashStatus sFlashStatus;
void SetPixel(volatile u16* buffer, u8 row, u8 col, u8 color) {
/* https://ianfinlayson.net/class/cpsc305/notes/09-graphics */
u16 offset = (row * SCREEN_WIDTH + col) >> 1;
u16 pixel = buffer[offset];
if (col & 1) {
buffer[offset] = (color << 8) | (pixel & 0x00FF);
} else {
buffer[offset] = (pixel & 0xFF00) | color;
}
}
void ClearList(void* vram, u8 top, u8 height) {
dmaCopy(bgBitmap + (top * (SCREEN_WIDTH >> 2)), (void*)AGB_VRAM+0xA000 + (top * SCREEN_WIDTH), SCREEN_WIDTH * height);
}
int main(void) {
char temp_ascii[64];
u16 temp_unicode[64];
s8 page_active = 0;
u8 page_total = 64;
u16 roms_total = 0;
s8 cursor_pos = 0;
u8 redraw_items = 0xFF;
u8 roms_page = 7;
u16 kHeld = 0;
u16 kHeld_boot = 0;
BOOL show_debug = FALSE;
BOOL show_credits = FALSE;
BOOL boot_failed = FALSE;
irqInit();
irqEnable(IRQ_VBLANK);
FlashDetectType();
// Load palette
memset((void*)AGB_VRAM, 255, SCREEN_WIDTH * SCREEN_HEIGHT * 2);
dmaCopy(bgPal, BG_PALETTE, 256 * 2);
((u16*)AGB_PRAM)[250] = 0xFFFF;
((u16*)AGB_PRAM)[251] = 0xB18C;
((u16*)AGB_PRAM)[252] = 0xDEF7;
((u16*)AGB_PRAM)[253] = 0x9084;
((u16*)AGB_PRAM)[254] = 0x8000;
((u16*)AGB_PRAM)[255] = 0xFFFF;
((u16*)AGB_PRAM)[240] = 0xFFFF;
((u16*)AGB_PRAM)[241] = 0xDD8C;
((u16*)AGB_PRAM)[242] = 0xFAF7;
((u16*)AGB_PRAM)[243] = 0xC084;
((u16*)AGB_PRAM)[244] = 0xC084;
((u16*)AGB_PRAM)[245] = 0xFFFF;
VBlankIntrWait();
// Load background
SetMode(MODE_4 | BG2_ENABLE);
dmaCopy(bgBitmap, (void*)AGB_VRAM+0xA000, SCREEN_WIDTH * SCREEN_HEIGHT);
// Check on-boot keys
scanKeys();
kHeld = keysHeld();
kHeld_boot = kHeld;
if ((kHeld & KEY_SELECT) && (kHeld & KEY_R)) {
show_credits = TRUE;
} else if (kHeld & KEY_SELECT) {
show_debug = TRUE;
}
if (kHeld) {
BOOL found_keys = FALSE;
for (itemlist_offset = 0; itemlist_offset < 0xE000; itemlist_offset += 0x70) {
memcpy(&sItemConfig, ((u8*)itemlist)+itemlist_offset, sizeof(sItemConfig));
if (sItemConfig.title_length == 0) break;
if (sItemConfig.title_length == 0xFF) break;
if (sItemConfig.keys == kHeld) {
found_keys = TRUE;
break;
}
}
if (!found_keys) {
kHeld = 0;
itemlist_offset = 0;
}
}
// Count number of ROMs
for (roms_total = 0; roms_total < 512; roms_total++) {
memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset)+(0x70*roms_total), sizeof(sItemConfig));
if (sItemConfig.keys != kHeld) break;
if (sItemConfig.title_length == 0) break;
if (sItemConfig.title_length == 0xFF) break;
}
if (roms_total == 0) {
LoadFont(2);
DrawText(0, 64, ALIGN_CENTER, u"Please use the ROM Builder to", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
DrawText(0, 64 + sFontSpecs.max_height, ALIGN_CENTER, u"create your own compilation.", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
LoadFont(0);
DrawText(0, 127, ALIGN_CENTER, u"https://github.com/lesserkuma/GBA_MultiMenu", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
DrawText(14, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_RIGHT, u"No ROMs", 10, font, (void*)AGB_VRAM+0xA000, FALSE);
REG_DISPCNT ^= 0x0010;
while (1) { VBlankIntrWait(); }
} else if (roms_total == 1) {
memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset), sizeof(sItemConfig));
u8 error_code = BootGame(sItemConfig, sFlashStatus);
boot_failed = error_code;
}
page_total = (roms_total + 8.0 - 1) / 8.0;
memcpy(&sFlashStatus, (void *)(AGB_ROM + flash_status_sector_offset * flash_sector_size), sizeof(sFlashStatus));
if ((sFlashStatus.magic != MAGIC_FLASH_STATUS) || (sFlashStatus.last_boot_menu_index >= roms_total)) {
sFlashStatus.magic = MAGIC_FLASH_STATUS;
sFlashStatus.version = 0;
sFlashStatus.battery_present = 1;
sFlashStatus.last_boot_menu_index = 0xFFFF;
sFlashStatus.last_boot_save_index = 0xFF;
sFlashStatus.last_boot_save_type = SRAM_NONE;
} else {
cursor_pos = sFlashStatus.last_boot_menu_index % 8;
page_active = sFlashStatus.last_boot_menu_index / 8;
}
s32 wait = 0;
u8 f = 0;
while (1) {
if (redraw_items != 0) {
if (redraw_items == 0xFF) {
// Full redraw (new page etc.)
roms_page = 7;
for (u8 i = 0; i < 8; i++) {
if ((page_active * 8 + i) >= roms_total) {
roms_page = i - 1;
break;
}
}
if (roms_page < 7) ClearList((void*)AGB_VRAM+0xA000, 26+(roms_page+1)*14, 14*(8-roms_page));
if (cursor_pos > roms_page) cursor_pos = roms_page;
for (u8 i = 0; i <= roms_page; i++) {
memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset)+0x70*(page_active*8+i), sizeof(sItemConfig));
ClearList((void*)AGB_VRAM+0xA000, 27+i*14, 14);
LoadFont(sItemConfig.font);
DrawText(28, 26+i*14, ALIGN_LEFT, sItemConfig.title, sItemConfig.title_length, font, (void*)AGB_VRAM+0xA000, i == cursor_pos);
}
} else {
// Re-draw only changed list items (cursor moved up or down)
for (u8 i = 0; i < 8; i++) {
if ((redraw_items >> i) & 1) {
memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset)+0x70*(page_active*8+i), sizeof(sItemConfig));
ClearList((void*)AGB_VRAM+0xA000, 27+i*14, 14);
LoadFont(sItemConfig.font);
DrawText(28, 26+i*14, ALIGN_LEFT, sItemConfig.title, sItemConfig.title_length, font, (void*)AGB_VRAM+0xA000, i == cursor_pos);
}
}
}
memcpy(&sItemConfig, ((u8*)itemlist+itemlist_offset)+0x70*(page_active*8+cursor_pos), sizeof(sItemConfig));
// Draw cursor
LoadFont(1);
ClearList((void*)AGB_VRAM+0xA000, SCREEN_HEIGHT - sFontSpecs.max_height - 1, sFontSpecs.max_height);
u16 arrow[1] = { ArrowCharacter };
DrawText(14, 26+cursor_pos*14, ALIGN_LEFT, (u16*)&arrow, 1, font, (void*)AGB_VRAM+0xA000, FALSE);
// Draw status bar
LoadFont(2);
memset(temp_unicode, 0, sizeof(temp_unicode));
snprintf(temp_ascii, 10+1, "%d/%d", page_active*8+cursor_pos+1, roms_total);
AsciiToUnicode(temp_ascii, temp_unicode);
DrawText(11, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_RIGHT, temp_unicode, 10, font, (void*)AGB_VRAM+0xA000, FALSE);
if (boot_failed) {
LoadFont(0);
if (boot_failed == 1) {
DrawText(5, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, u"Error: Unsupported cartridge!", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
} else if (boot_failed == 2) {
DrawText(5, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, u"Error: Mapper is not responding!", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
} else {
DrawText(5, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, u"Error: Game couldn't be launched!", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
}
} else if (show_credits) {
LoadFont(0);
memset(temp_unicode, 0, sizeof(temp_unicode));
snprintf(temp_ascii, 48, "Menu by LK - %s", BUILDTIME);
AsciiToUnicode(temp_ascii, temp_unicode);
DrawText(6, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, temp_unicode, 48, font, (void*)AGB_VRAM+0xA000, FALSE);
} else if (show_debug) {
LoadFont(0);
u8 a = ((sItemConfig.rom_offset / 0x40) & 0xF) << 4;
u8 b = 0x40 + (sItemConfig.rom_offset % 0x40);
u8 c = 0x40 - sItemConfig.rom_size;
snprintf(temp_ascii, 64, "%02X:%02X:%02X|0x%X~%dMiB|%X", a, b, c, (int)(sItemConfig.rom_offset * 512 * 1024), (int)(sItemConfig.rom_size * 512 >> 10), (int)(flash_save_sector_offset + sItemConfig.save_index));
memset(temp_unicode, 0, sizeof(temp_unicode));
AsciiToUnicode(temp_ascii, temp_unicode);
DrawText(6, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, temp_unicode, 64, font, (void*)AGB_VRAM+0xA000, FALSE);
}
// VRAM bank swapping
REG_DISPCNT ^= 0x0010;
dmaCopy((void*)AGB_VRAM+0xA000, (void*)AGB_VRAM, SCREEN_WIDTH * SCREEN_HEIGHT);
REG_DISPCNT ^= 0x0010;
redraw_items = 0;
}
// Check for menu keys
scanKeys();
kHeld = keysHeld();
if ((kHeld_boot == 0) || (kHeld != kHeld_boot)) {
kHeld_boot = 0;
} else {
kHeld = 0;
}
if (kHeld != 0) {
wait++;
} else {
f = 0;
}
if (((kHeld & 0x3FF) && !f) || (wait > 1000)) {
if (!f) {
wait = -8000;
} else {
wait = 0;
}
f = 1;
if (boot_failed) {
SystemCall(0); // Soft reset
}
if ((kHeld & KEY_A) || (kHeld & KEY_START)) {
sFlashStatus.last_boot_menu_index = page_active * 8 + cursor_pos;
if (!show_credits && !show_debug) {
LoadFont(0);
DrawText(5, SCREEN_HEIGHT - sFontSpecs.max_height - 3 - FontMarginBottom, ALIGN_LEFT, u"Loading… Don't turn off the power!", 48, font, (void*)AGB_VRAM+0xA000, FALSE);
REG_DISPCNT ^= 0x0010;
dmaCopy((void*)AGB_VRAM+0xA000, (void*)AGB_VRAM, SCREEN_WIDTH * SCREEN_HEIGHT);
REG_DISPCNT ^= 0x0010;
}
if (kHeld & KEY_SELECT) {
// Skips reading latest save data from SRAM
sFlashStatus.last_boot_save_type = SRAM_NONE;
}
u8 error_code = BootGame(sItemConfig, sFlashStatus);
boot_failed = error_code;
redraw_items = 0xFF;
REG_IE = 1;
} else if (kHeld & KEY_B) {
SystemCall(0); // Soft reset
} else if ((kHeld & KEY_LEFT) || (kHeld & KEY_RIGHT)) {
if (kHeld & KEY_LEFT) {
page_active--;
} else if (kHeld & KEY_RIGHT) {
page_active++;
}
if (page_active > page_total - 1) page_active = 0;
if (page_active < 0) page_active = page_total - 1;
redraw_items = 0xFF;
} else if ((kHeld & KEY_UP) || (kHeld & KEY_DOWN)) {
redraw_items |= 1 << cursor_pos;
if (kHeld & KEY_UP)
cursor_pos--;
else if (kHeld & KEY_DOWN)
cursor_pos++;
if (cursor_pos < 0) {
cursor_pos = 7;
page_active--;
redraw_items = 0xFF;
} else if (cursor_pos > roms_page) {
cursor_pos = 0;
page_active++;
redraw_items = 0xFF;
}
if (page_active > page_total - 1) page_active = 0;
if (page_active < 0) page_active = page_total - 1;
redraw_items |= 1 << cursor_pos;
}
}
}
while (1) { VBlankIntrWait(); }
}
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