minecraft-pi-reborn/mods/src/title-screen/title-screen.cpp

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#include <libreborn/libreborn.h>
#include <symbols/minecraft.h>
#include <mods/feature/feature.h>
#include <mods/init/init.h>
#include <mods/compat/compat.h>
// Improved Title Screen Background
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static void StartMenuScreen_render_Screen_renderBackground_injection(StartMenuScreen *screen) {
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// Draw
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Minecraft *minecraft = screen->minecraft;
Textures *textures = minecraft->textures;
std::string texture = "gui/titleBG.png";
(*Textures_loadAndBindTexture)(textures, &texture);
(*StartMenuScreen_blit)(screen, 0, 0, 0, 0, screen->width, screen->height, 0x100, 0x100);
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}
// Add Buttons Back To Classic Start Screen
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static void StartMenuScreen_init_injection(StartMenuScreen *screen) {
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// Call Original Method
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(*StartMenuScreen_init_non_virtual)(screen);
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// Add Button
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std::vector<Button *> *rendered_buttons = &screen->rendered_buttons;
std::vector<Button *> *selectable_buttons = &screen->selectable_buttons;
Button *options_button = &screen->options_button;
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rendered_buttons->push_back(options_button);
selectable_buttons->push_back(options_button);
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Button *create_button = &screen->create_button; // Repurpose Unused "Create" Button As Quit Button
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rendered_buttons->push_back(create_button);
selectable_buttons->push_back(create_button);
}
// Add Functionality To Quit Button
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static void StartMenuScreen_buttonClicked_injection(StartMenuScreen *screen, Button *button) {
Button *quit_button = &screen->create_button;
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if (button == quit_button) {
// Quit
compat_request_exit();
} else {
// Call Original Method
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(*StartMenuScreen_buttonClicked_non_virtual)(screen, button);
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}
}
// Init
void init_title_screen() {
// Improved Title Screen Background
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if (feature_has("Add Title Screen Background", server_disabled)) {
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// Switch Background
overwrite_call((void *) 0x39528, (void *) StartMenuScreen_render_Screen_renderBackground_injection);
overwrite_call((void *) 0x3dee0, (void *) StartMenuScreen_render_Screen_renderBackground_injection);
// Text Color
patch_address((void *) 0x397ac, (void *) 0xffffffff);
patch_address((void *) 0x3e10c, (void *) 0xffffffff);
}
// Improved Classic Title Screen
if (feature_has("Improved Classic Title Screen", server_disabled)) {
// Add Options Button Back To Classic Start Screen
patch_address(StartMenuScreen_init_vtable_addr, (void *) StartMenuScreen_init_injection);
// Fix Classic UI Button Size
unsigned char classic_button_height_patch[4] = {0x18, 0x30, 0xa0, 0xe3}; // "mov r3, #0x18"
patch((void *) 0x39a9c, classic_button_height_patch);
patch((void *) 0x39ae0, classic_button_height_patch);
// Fix Classic UI Buttons Spacing
{
// Join Button
unsigned char classic_join_button_spacing_patch[4] = {0x12, 0x20, 0x83, 0xe2}; // "add r2, r3, #0x12"
patch((void *) 0x39894, classic_join_button_spacing_patch);
// Start Button
unsigned char classic_start_button_spacing_patch[4] = {0x08, 0x20, 0x43, 0xe2}; // "sub r2, r3, #0x08"
patch((void *) 0x3988c, classic_start_button_spacing_patch);
// Options Button
unsigned char classic_options_button_spacing_patch[4] = {0x2c, 0x30, 0x83, 0xe2}; // "add r3, r3, #0x2c"
patch((void *) 0x39898, classic_options_button_spacing_patch);
}
// Rename "Create" Button To "Quit"
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patch_address((void *) Strings_classic_create_button_text, (void *) "Quit");
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// Add Functionality To Quit Button
patch_address(StartMenuScreen_buttonClicked_vtable_addr, (void *) StartMenuScreen_buttonClicked_injection);
}
}