231 lines
9.5 KiB
C++
231 lines
9.5 KiB
C++
#include <string>
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#include <vector>
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#include <sstream>
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#include <string.h>
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#include <libreborn/libreborn.h>
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#include "../feature/feature.h"
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#include "../home/home.h"
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#include "options.h"
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#include <symbols/minecraft.h>
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// Fix Initial Option Button Rendering
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// The calling function doesn't exist in MCPE v0.6.1, so its name is unknown.
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static unsigned char *OptionsPane_unknown_toggle_creating_function_OptionButton_injection(unsigned char *option_button, unsigned char *option) {
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// Call Original Method
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unsigned char *ret = (*OptionButton)(option_button, option);
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// Setup Image
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(*OptionButton_updateImage)(option_button, stored_options);
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// Return
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return ret;
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}
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// Actually Save options.txt
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// Hook Last Options::addOptionToSaveOutput Call
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static void Options_save_Options_addOptionToSaveOutput_injection(unsigned char *options, std::vector<std::string> &data, std::string option, int32_t value) {
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// Call Original Method
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(*Options_addOptionToSaveOutput)(options, data, option, value);
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// Save Fancy Graphics
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(*Options_addOptionToSaveOutput)(options, data, "gfx_fancygraphics", *(options + Options_fancy_graphics_property_offset));
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// Save File
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unsigned char *options_file = options + Options_options_file_property_offset;
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(*OptionsFile_save)(options_file, data);
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}
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// MCPI's OptionsFile::getOptionStrings is broken, this is the version in v0.7.0
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static std::vector<std::string> OptionsFile_getOptionStrings_injection(unsigned char *options_file) {
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// Get options.txt Path
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std::string path = *(std::string *) (options_file + OptionsFile_options_txt_path_property_offset);
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// Parse
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std::vector<std::string> ret;
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FILE *stream = fopen(path.c_str(), "r");
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char line[128];
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if (stream != NULL) {
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while (fgets(line, 0x80, stream) != NULL) {
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size_t sVar1 = strlen(line);
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if (2 < sVar1) {
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std::stringstream string_stream(line);
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while (true) {
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std::string data;
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std::getline(string_stream, data, ':');
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int iVar2 = data.find_last_not_of(" \n\r\t");
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data.erase(iVar2 + 1);
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if (data.length() == 0) {
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break;
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}
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ret.push_back(data);
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}
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}
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}
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fclose(stream);
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}
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return ret;
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}
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// Get New options.txt Path
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#ifndef MCPI_SERVER_MODE
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static char *get_new_options_txt_path() {
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static char *path = NULL;
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// Path
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if (path == NULL) {
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safe_asprintf(&path, "%s/options.txt", home_get());
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}
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// Return
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return path;
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}
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// Free
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__attribute__((destructor)) static void _free_new_options_txt_path() {
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free(get_new_options_txt_path());
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}
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#else
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static char *get_new_options_txt_path() {
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// Block options.txt On Servers
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return (char *) "/dev/null";
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}
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#endif
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// Modify Option Toggles
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static void OptionsPane_unknown_toggle_creating_function_injection(unsigned char *options_pane, unsigned char *unknown_object, std::string const& name, unsigned char *option) {
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// Modify
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std::string new_name = name;
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if (name == "Fancy Graphics") {
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option = Options_Option_GRAPHICS;
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} else if (name == "Soft shadows") {
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option = Options_Option_AMBIENT_OCCLUSION;
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} else if (name == "Fancy Skies" || name == "Animated water") {
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// These have no corresponding option, so disable the toggle.
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return;
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} else if (name == "Third person camera") {
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// This isn't saved/loaded, so disable the toggle.
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return;
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} else if (name == "Lefty" || name == "Use touch screen" || name == "Split touch controls") {
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// These toggles require touch support, so disable them.
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return;
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} else if (name == "Vibrate on destroy") {
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// This toggle requires vibration support, so disable it.
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return;
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} else if (name == "Invert X-axis") {
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// Fix Incorrect Name
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new_name = "Invert Y-axis";
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}
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// Call Original Method
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(*OptionsPane_unknown_toggle_creating_function)(options_pane, unknown_object, new_name, option);
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}
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// Add Missing Options To Options::getBooleanValue
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static bool Options_getBooleanValue_injection(unsigned char *options, unsigned char *option) {
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// Check
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if (option == Options_Option_GRAPHICS) {
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return *(options + Options_fancy_graphics_property_offset);
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} else {
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// Call Original Method
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return (*Options_getBooleanValue)(options, option);
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}
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}
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// Add Options Button Back To Classic Start Screen
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static void StartMenuScreen_init_injection(unsigned char *screen) {
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// Call Original Method
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(*StartMenuScreen_init)(screen);
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// Add Button
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std::vector<unsigned char *> *rendered_buttons = (std::vector<unsigned char *> *) (screen + Screen_rendered_buttons_property_offset);
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std::vector<unsigned char *> *selectable_buttons = (std::vector<unsigned char *> *) (screen + Screen_selectable_buttons_property_offset);
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unsigned char *options_button = screen + StartMenuScreen_options_button_property_offset;
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rendered_buttons->push_back(options_button);
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selectable_buttons->push_back(options_button);
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}
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// Init C++
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void _init_options_cpp() {
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// NOP
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unsigned char nop_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop"
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// Fix Options Screen
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if (feature_has("Fix Options Screen", server_disabled)) {
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// Fix Initial Option Button Rendering
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overwrite_call((void *) 0x24510, (void *) OptionsPane_unknown_toggle_creating_function_OptionButton_injection);
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// "Gui Scale" slider is broken, so disable it.
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patch((void *) 0x35a10, nop_patch);
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// "Vibrate on destroy" is disabled, so "Feedback" is empty, so disable it.
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patch((void *) 0x35960, nop_patch);
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// Disconnect "This works?" Slider From Difficulty
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unsigned char this_works_slider_patch[4] = {0x00, 0x30, 0xa0, 0xe3}; // "mov r3, #0x0"
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patch((void *) 0x3577c, this_works_slider_patch);
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// Modify Option Toggles
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overwrite_calls((void *) OptionsPane_unknown_toggle_creating_function, (void *) OptionsPane_unknown_toggle_creating_function_injection);
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// Add Missing Options To Options::getBooleanValue
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overwrite_calls((void *) Options_getBooleanValue, (void *) Options_getBooleanValue_injection);
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// Add Options Button Back To Classic Start Screen
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patch_address(StartMenuScreen_init_vtable_addr, (void *) StartMenuScreen_init_injection);
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// Fix Classic UI Options Button Size
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unsigned char classic_options_button_width_patch[4] = {0xa0, 0x00, 0xa0, 0xe3}; // "mov r0, #0xa0"
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patch((void *) 0x39a98, classic_options_button_width_patch);
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unsigned char classic_options_button_height_patch[4] = {0x18, 0x30, 0xa0, 0xe3}; // "mov r3, #0x18"
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patch((void *) 0x39a9c, classic_options_button_height_patch);
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// Fix Classic UI Buttons Spacing
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{
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// Join Button
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unsigned char classic_join_button_spacing_patch[4] = {0x12, 0x20, 0x83, 0xe2}; // "add r2, r3, #0x12"
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patch((void *) 0x39894, classic_join_button_spacing_patch);
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// Start Button
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unsigned char classic_start_button_spacing_patch[4] = {0x08, 0x20, 0x43, 0xe2}; // "sub r2, r3, #0x08"
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patch((void *) 0x3988c, classic_start_button_spacing_patch);
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// Options Button
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unsigned char classic_options_button_spacing_patch[4] = {0x2c, 0x30, 0x83, 0xe2}; // "add r3, r3, #0x2c"
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patch((void *) 0x39898, classic_options_button_spacing_patch);
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}
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}
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// Actually Save options.txt
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overwrite_call((void *) 0x197fc, (void *) Options_save_Options_addOptionToSaveOutput_injection);
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// Fix options.txt Path
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patch_address((void *) options_txt_path, (void *) get_new_options_txt_path());
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// When Loading, options.txt Should Be Opened In Read Mode
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patch_address((void *) options_txt_fopen_mode_when_loading, (void *) "r");
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// Fix OptionsFile::getOptionStrings
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overwrite_calls((void *) OptionsFile_getOptionStrings, (void *) OptionsFile_getOptionStrings_injection);
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// Sensitivity Loading/Saving Is Broken, Disable It
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patch((void *) 0x1931c, nop_patch);
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patch((void *) 0x1973c, nop_patch);
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// Unsplit Touch Controls Breaks Things, Never Load/Save It
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unsigned char cmp_r0_r0_patch[4] = {0x00, 0x00, 0x50, 0xe1}; // "cmp r0, r0"
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patch((void *) 0x19378, cmp_r0_r0_patch);
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patch((void *) 0x197cc, nop_patch);
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// Custom Username Is Loaded Manually, Disable Loading From options.txt
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patch((void *) 0x192ac, nop_patch);
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// Replace "feedback_vibration" Loading/Saving With "gfx_ao"
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{
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// Replace String
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static const char *new_feedback_vibration_options_txt_nam = "gfx_ao";
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patch_address((void *) feedback_vibration_options_txt_name_1, (void *) &new_feedback_vibration_options_txt_nam);
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patch_address((void *) feedback_vibration_options_txt_name_2, (void *) &new_feedback_vibration_options_txt_nam);
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// Loading
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unsigned char gfx_ao_loading_patch[4] = {(unsigned char) Options_ambient_occlusion_property_offset, 0x10, 0x84, 0xe2}; // "add param_2, r4, #OFFSET"
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patch((void *) 0x193b8, gfx_ao_loading_patch);
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// Saving
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unsigned char gfx_ao_saving_patch[4] = {(unsigned char) Options_ambient_occlusion_property_offset, 0x30, 0xd4, 0xe5}; // "ldrb r3, [r4, #OFFSET]"
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patch((void *) 0x197f8, gfx_ao_saving_patch);
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}
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// Disable "gfx_lowquality" Loading
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patch((void *) 0x19414, nop_patch);
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patch((void *) 0x1941c, nop_patch);
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}
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