94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <libreborn/libreborn.h>
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#include <libreborn/minecraft.h>
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#include "../feature/feature.h"
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#include "misc.h"
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#include "../init/init.h"
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// Minecraft Pi User Data Root
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#define NEW_PATH "/.minecraft-pi/"
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// Maximum Username Length
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#define MAX_USERNAME_LENGTH 16
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// Render Selected Item Text
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static void Gui_renderChatMessages_injection(unsigned char *gui, int32_t param_1, uint32_t param_2, uint32_t param_3, unsigned char *font) {
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// Call Original Method
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(*Gui_renderChatMessages)(gui, param_1, param_2, param_3, font);
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// Calculate Selected Item Text Scale
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unsigned char *minecraft = *(unsigned char **) (gui + Gui_minecraft_property_offset);
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int32_t screen_width = *(int32_t *) (minecraft + Minecraft_screen_width_property_offset);
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float scale = ((float) screen_width) * *InvGuiScale;
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// Render Selected Item Text
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(*Gui_renderOnSelectItemNameText)(gui, (int32_t) scale, font, param_1 - 0x13);
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}
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// Reset Selected Item Text Timer On Slot Select
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static uint32_t reset_selected_item_text_timer = 0;
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static void Gui_tick_injection(unsigned char *gui) {
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// Call Original Method
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(*Gui_tick)(gui);
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// Handle Reset
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float *selected_item_text_timer = (float *) (gui + Gui_selected_item_text_timer_property_offset);
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if (reset_selected_item_text_timer) {
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// Reset
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*selected_item_text_timer = 0;
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reset_selected_item_text_timer = 0;
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}
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}
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// Trigger Reset Selected Item Text Timer On Slot Select
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static void Inventory_selectSlot_injection(unsigned char *inventory, int32_t slot) {
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// Call Original Method
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(*Inventory_selectSlot)(inventory, slot);
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// Trigger Reset Selected Item Text Timer
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reset_selected_item_text_timer = 1;
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}
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// Sanitize Username
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static void LoginPacket_read_injection(unsigned char *packet, unsigned char *bit_stream) {
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// Call Original Method
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(*LoginPacket_read)(packet, bit_stream);
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// Prepare
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unsigned char *rak_string = packet + LoginPacket_username_property_offset;
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// Get Original Username
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unsigned char *shared_string = *(unsigned char **) (rak_string + RakNet_RakString_sharedString_property_offset);
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char *c_str = *(char **) (shared_string + RakNet_RakString_SharedString_c_str_property_offset);
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// Sanitize
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char *new_username = strdup(c_str);
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ALLOC_CHECK(new_username);
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sanitize_string(&new_username, MAX_USERNAME_LENGTH, 0);
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// Set New Username
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(*RakNet_RakString_Assign)(rak_string, new_username);
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// Free
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free(new_username);
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}
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void init_misc() {
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// Store Data In ~/.minecraft-pi Instead Of ~/.minecraft
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patch_address((void *) default_path, (void *) NEW_PATH);
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if (feature_has("Remove Invalid Item Background")) {
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// Remove Invalid Item Background (A Red Background That Appears For Items That Are Not Included In The gui_blocks Atlas)
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unsigned char invalid_item_background_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop"
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patch((void *) 0x63c98, invalid_item_background_patch);
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}
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// Fix Selected Item Text
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overwrite_calls((void *) Gui_renderChatMessages, (void *) Gui_renderChatMessages_injection);
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overwrite_calls((void *) Gui_tick, (void *) Gui_tick_injection);
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overwrite_calls((void *) Inventory_selectSlot, (void *) Inventory_selectSlot_injection);
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// Sanitize Username
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patch_address(LoginPacket_read_vtable_addr, (void *) LoginPacket_read_injection);
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// Show FPS Monitor
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if (feature_has("Show FPS Monitor")) {
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setenv("GALLIUM_HUD", "simple,fps", 1);
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}
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// Init C++
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init_misc_cpp();
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} |