minecraft-pi-reborn/mods/src/options/options.cpp

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#include <string>
#include <vector>
#include <sstream>
#include <string.h>
#include <libreborn/libreborn.h>
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#include <mods/feature/feature.h>
#include <mods/home/home.h>
#include "options-internal.h"
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#include <symbols/minecraft.h>
// Fix Initial Option Button Rendering
// The calling function doesn't exist in MCPE v0.6.1, so its name is unknown.
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static OptionButton *OptionsPane_unknown_toggle_creating_function_OptionButton_injection(OptionButton *option_button, Options_Option *option) {
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// Call Original Method
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OptionButton *ret = OptionButton_constructor(option_button, option);
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// Setup Image
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OptionButton_updateImage(option_button, stored_options);
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// Return
return ret;
}
// Actually Save options.txt
// Hook Last Options::addOptionToSaveOutput Call
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static void Options_save_Options_addOptionToSaveOutput_injection(Options *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->fancy_graphics);
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// Save 3D Anaglyph
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Options_addOptionToSaveOutput(options, data, "gfx_anaglyph", options->anaglyph_3d);
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// Save File
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OptionsFile *options_file = &options->options_file;
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OptionsFile_save(options_file, data);
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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(OptionsFile *options_file) {
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// Get options.txt Path
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std::string path = options_file->options_txt_path;
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// Parse
std::vector<std::string> ret;
FILE *stream = fopen(path.c_str(), "r");
char line[128];
if (stream != NULL) {
while (fgets(line, 0x80, stream) != NULL) {
size_t sVar1 = strlen(line);
if (2 < sVar1) {
std::stringstream string_stream(line);
while (true) {
std::string data;
std::getline(string_stream, data, ':');
int iVar2 = data.find_last_not_of(" \n\r\t");
data.erase(iVar2 + 1);
if (data.length() == 0) {
break;
}
ret.push_back(data);
}
}
}
fclose(stream);
}
return ret;
}
// Get New options.txt Path
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#ifndef MCPI_SERVER_MODE
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static char *get_new_options_txt_path() {
static char *path = NULL;
// Path
if (path == NULL) {
safe_asprintf(&path, "%s/options.txt", home_get());
}
// Return
return path;
}
// Free
__attribute__((destructor)) static void _free_new_options_txt_path() {
free(get_new_options_txt_path());
}
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#else
static char *get_new_options_txt_path() {
// Block options.txt On Servers
return (char *) "/dev/null";
}
#endif
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// Modify Option Toggles
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static void OptionsPane_unknown_toggle_creating_function_injection(OptionsPane *options_pane, uint32_t group_id, std::string *name_ptr, Options_Option *option) {
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// Modify
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std::string name = *name_ptr;
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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") {
// These have no corresponding option, so disable the toggle.
return;
} else if (name == "Third person camera") {
// This isn't saved/loaded, so disable the toggle.
return;
} else if (name == "Lefty" || name == "Use touch screen" || name == "Split touch controls") {
// These toggles require touch support, so disable them.
return;
} else if (name == "Vibrate on destroy") {
// This toggle requires vibration support, so disable it.
return;
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} else if (name == "Invert X-axis") {
// Fix Incorrect Name
new_name = "Invert Y-axis";
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}
// Call Original Method
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OptionsPane_unknown_toggle_creating_function(options_pane, group_id, &new_name, option);
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// Add 3D Anaglyph
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if (option == &Options_Option_GRAPHICS) {
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std::string cpp_string = "3D Anaglyph";
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OptionsPane_unknown_toggle_creating_function(options_pane, group_id, &cpp_string, &Options_Option_ANAGLYPH);
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}
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// Add Peaceful Mode
if (option == &Options_Option_SERVER_VISIBLE) {
std::string cpp_string = "Peaceful mode";
OptionsPane_unknown_toggle_creating_function(options_pane, group_id, &cpp_string, &Options_Option_DIFFICULTY);
}
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}
// Add Missing Options To Options::getBooleanValue
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static bool Options_getBooleanValue_injection(Options *options, Options_Option *option) {
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// Check
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if (option == &Options_Option_GRAPHICS) {
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return options->fancy_graphics;
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} else if (option == &Options_Option_DIFFICULTY) {
return options->game_difficulty == 0;
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} else {
// Call Original Method
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return Options_getBooleanValue(options, option);
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}
}
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// Fix Difficulty When Toggling
static void OptionButton_toggle_Options_save_injection(Options *self) {
// Fix Value
if (self->game_difficulty == 1) {
// Disable Peaceful
self->game_difficulty = 2;
} else if (self->game_difficulty == 3) {
// Switch To Peaceful
self->game_difficulty = 0;
}
// Call Original Method
Options_save(self);
}
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// Init C++
void _init_options_cpp() {
// NOP
unsigned char nop_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop"
// Fix Options Screen
if (feature_has("Fix Options Screen", server_disabled)) {
// Fix Initial Option Button Rendering
overwrite_call((void *) 0x24510, (void *) OptionsPane_unknown_toggle_creating_function_OptionButton_injection);
// "Gui Scale" slider is broken, so disable it.
patch((void *) 0x35a10, nop_patch);
// "Vibrate on destroy" is disabled, so "Feedback" is empty, so disable it.
patch((void *) 0x35960, nop_patch);
// Disconnect "This works?" Slider From Difficulty
unsigned char this_works_slider_patch[4] = {0x00, 0x30, 0xa0, 0xe3}; // "mov r3, #0x0"
patch((void *) 0x3577c, this_works_slider_patch);
// Modify Option Toggles
overwrite_calls((void *) OptionsPane_unknown_toggle_creating_function, (void *) OptionsPane_unknown_toggle_creating_function_injection);
// Add Missing Options To Options::getBooleanValue
overwrite_calls((void *) Options_getBooleanValue, (void *) Options_getBooleanValue_injection);
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// Fix Difficulty When Toggling
overwrite_call((void *) 0x1cd00, (void *) OptionButton_toggle_Options_save_injection);
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}
// Actually Save options.txt
overwrite_call((void *) 0x197fc, (void *) Options_save_Options_addOptionToSaveOutput_injection);
// Fix options.txt Path
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patch_address((void *) Strings_options_txt_path_pointer, (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 *) Strings_options_txt_fopen_mode_when_loading_pointer, (void *) "r");
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// Fix OptionsFile::getOptionStrings
overwrite_calls((void *) OptionsFile_getOptionStrings, (void *) OptionsFile_getOptionStrings_injection);
// Sensitivity Loading/Saving Is Broken, Disable It
patch((void *) 0x1931c, nop_patch);
patch((void *) 0x1973c, nop_patch);
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// Unsplit Touch Controls Breaks Things, Never Load/Save It
unsigned char cmp_r0_r0_patch[4] = {0x00, 0x00, 0x50, 0xe1}; // "cmp r0, r0"
patch((void *) 0x19378, cmp_r0_r0_patch);
patch((void *) 0x197cc, nop_patch);
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// Custom Username Is Loaded Manually, Disable Loading From options.txt
patch((void *) 0x192ac, nop_patch);
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// Replace "feedback_vibration" Loading/Saving With "gfx_ao"
{
// Replace String
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static const char *new_feedback_vibration_options_txt_name = "gfx_ao";
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patch_address((void *) Strings_feedback_vibration_options_txt_name_1_pointer, (void *) &new_feedback_vibration_options_txt_name);
patch_address((void *) Strings_feedback_vibration_options_txt_name_2_pointer, (void *) &new_feedback_vibration_options_txt_name);
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// Loading
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unsigned char offset = (unsigned char) offsetof(Options, ambient_occlusion);
unsigned char gfx_ao_loading_patch[4] = {offset, 0x10, 0x84, 0xe2}; // "add r1, r4, #OFFSET"
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patch((void *) 0x193b8, gfx_ao_loading_patch);
// Saving
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unsigned char gfx_ao_saving_patch[4] = {offset, 0x30, 0xd4, 0xe5}; // "ldrb r3, [r4, #OFFSET]"
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patch((void *) 0x197f8, gfx_ao_saving_patch);
}
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// Replace "gfx_lowquality" Loading With "gfx_anaglyph"
{
// Replace String
static const char *new_gfx_lowquality_options_txt_name = "gfx_anaglyph";
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patch_address((void *) Strings_gfx_lowquality_options_txt_name_pointer, (void *) &new_gfx_lowquality_options_txt_name);
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// Loading
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unsigned char offset = (unsigned char) offsetof(Options, anaglyph_3d);
unsigned char gfx_anaglyph_loading_patch[4] = {offset, 0x10, 0x84, 0xe2}; // "add r1, r4, #OFFSET"
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patch((void *) 0x19400, gfx_anaglyph_loading_patch);
// Disable Loading Side Effects
patch((void *) 0x19414, nop_patch);
patch((void *) 0x1941c, nop_patch);
}
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}