minecraft-pi-reborn/mods/src/touch/touch.c
2021-09-12 00:08:01 -04:00

55 lines
2.0 KiB
C

#include <libreborn/libreborn.h>
#include "../feature/feature.h"
#include "../init/init.h"
#include <symbols/minecraft.h>
// Enable Touch GUI
static int32_t Minecraft_isTouchscreen_injection(__attribute__((unused)) unsigned char *minecraft) {
return 1;
}
// Custom Cursor Rendering
// The Default Behavior For Touch GUI Is To Only Render The Cursor When The Mouse Is Clicking, This Fixes That
static void GameRenderer_render_injection(unsigned char *game_renderer, float param_1) {
// Call Real Method
(*GameRenderer_render)(game_renderer, param_1);
// Render Cursor
unsigned char *minecraft = *(unsigned char **) (game_renderer + GameRenderer_minecraft_property_offset);
unsigned char *current_screen = *(unsigned char **) (minecraft + Minecraft_screen_property_offset);
// Check If Cursor Should Render
if (current_screen != NULL) {
// Get X And Y
float x = (*Mouse_getX)() * (*InvGuiScale);
float y = (*Mouse_getY)() * (*InvGuiScale);
// Render
(*renderCursor)(x, y, minecraft);
}
}
// Init
void init_touch() {
int touch_gui = feature_has("Touch GUI", 0);
if (touch_gui) {
// Main UI
overwrite((void *) Minecraft_isTouchscreen, (void *) Minecraft_isTouchscreen_injection);
// Disable Normal Cursor Rendering
unsigned char disable_cursor_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop"
patch((void *) 0x4a6c0, disable_cursor_patch);
// Add Custom Cursor Rendering
overwrite_calls((void *) GameRenderer_render, (void *) GameRenderer_render_injection);
// Force Correct Toolbar Size
unsigned char toolbar_patch[4] = {0x01, 0x00, 0x50, 0xe3}; // "cmp r0, #0x1"
patch((void *) 0x257b0, toolbar_patch);
}
// Show Block Outlines
int block_outlines = feature_has("Show Block Outlines", 0);
unsigned char outline_patch[4] = {block_outlines ? !touch_gui : touch_gui, 0x00, 0x50, 0xe3}; // "cmp r0, #0x1" or "cmp r0, #0x0"
patch((void *) 0x4a210, outline_patch);
}