Add Smooth Lighting

CREDITS.md

@@ -0,0 +1,10 @@
+# Credits
+| Project | Reason |
+| --- | --- |
+| [mhsjlw/mcpilauncher](https://github.com/mhsjlw/mcpilauncher/blob/master/trampoline/trampoline.c) | Information On Getting Minecraft: Pi Eiditon To Run On Desktop Linux |
+| [Phirel's Survival Patch](https://www.minecraftforum.net/forums/minecraft-editions/minecraft-pi-edition/1960005-survival-mode-patch) | Information On Survival Mode Support |
+| [zhuowei/MinecraftPEModWiki](https://github.com/zhuowei/MinecraftPEModWiki/wiki/How-some-unlocks-are-made) | Information On Smooth Lighting Support |
+| [Ghidra](https://ghidra-sre.org) | Used For Decompiling Minecraft: Pi Edition |
+| [RetDec](https://retdec.com) | Used For Decompiling Minecraft: Pi Edition |
+| [minecraft-linux/mcpelauncher-core](https://github.com/minecraft-linux/mcpelauncher-core/blob/6b5e17b5685a612143297ae4595bdd12327284f3/src/patch_utils.cpp#L42) | Original Function Overwrite Code |
+| [Hooking C Functions at Runtime - Thomas Finch](http://thomasfinch.me/blog/2015/07/24/Hooking-C-Functions-At-Runtime.html) | Original Patching Code |

debian/client/common/usr/bin/minecraft-pi

@@ -4,7 +4,21 @@ set -e
 
 # Ensure Features Are Selected
 if [ -z "${MCPI_SUBSHELL}" ]; then
-    MCPI_FEATURES="$(zenity --class 'Minecraft - Pi edition' --list --checklist --column 'Enabled' --column 'Feature' TRUE 'Touch GUI' FALSE 'Survival Mode' TRUE 'Fix Bow & Arrow' TRUE 'Fix Attacking' TRUE 'Mob Spawning' TRUE 'Fancy Graphics' TRUE 'Disable Autojump By Default' TRUE 'Fix Sign Placement' TRUE 'Show Block Outlines' FALSE 'Expand Creative Inventory' FALSE 'Peaceful Mode' TRUE 'Animated Water' TRUE 'Remove Invalid Item Background')"
+    MCPI_FEATURES="$(zenity --class 'Minecraft - Pi edition' --list --checklist --column 'Enabled' --column 'Feature' \
+        TRUE 'Touch GUI' \
+        FALSE 'Survival Mode' \
+        TRUE 'Fix Bow & Arrow' \
+        TRUE 'Fix Attacking' \
+        TRUE 'Mob Spawning' \
+        TRUE 'Fancy Graphics' \
+        TRUE 'Disable Autojump By Default' \
+        TRUE 'Fix Sign Placement' \
+        TRUE 'Show Block Outlines' \
+        FALSE 'Expand Creative Inventory' \
+        FALSE 'Peaceful Mode' \
+        TRUE 'Animated Water' \
+        TRUE 'Remove Invalid Item Background' \
+        TRUE 'Smooth Lighting')"
     MCPI_USERNAME="$(zenity --class 'Minecraft - Pi edition' --entry --text 'Minecraft Username:' --entry-text 'StevePi')"
 fi
 export MCPI_FEATURES

mods/src/compat.c

@@ -455,6 +455,12 @@ HOOK(SDL_GetWMInfo, int, (SDL_SysWMinfo *info)) {
     return 1;
 }
 
+// Force Smooth Shading In Smooth Lighting Mode
+HOOK(glShadeModel, void, (GLenum mode)) {
+    ensure_glShadeModel();
+    (*real_glShadeModel)(extra_get_smooth_lighting() ?  GL_SMOOTH : mode);
+}
+
 #include <stdlib.h>
 
 // Use VirGL

mods/src/extra.c

@@ -7,10 +7,12 @@
 #include "server/server.h"
 
 static int mob_spawning = 0;
+// Override Mob Spawning
 static uint32_t LevelData_getSpawnMobs_injection(__attribute__((unused)) unsigned char *level_data) {
     return mob_spawning;
 }
 
+// Store Right-Click Status
 static int is_right_click = 0;
 void extra_set_is_right_click(int val) {
     is_right_click = val;
@@ -27,6 +29,7 @@ static Player_isUsingItem_t Player_isUsingItem = (Player_isUsingItem_t) 0x8f15c;
 // Enable Bow & Arrow Fix
 static int fix_bow = 0;
 
+// Handle Input Fixes
 static void Minecraft_tickInput_injection(unsigned char *minecraft) {
     // Call Original Method
     (*Minecraft_tickInput)(minecraft);
@@ -52,6 +55,7 @@ static Gui_tickItemDrop_t Gui_tickItemDrop = (Gui_tickItemDrop_t) 0x27778;
 
 #include <SDL/SDL_events.h>
 
+// Block UI Interaction When Mouse Is Locked
 static void Gui_tickItemDrop_injection(unsigned char *this) {
     if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
         // Call Original Method
@@ -62,6 +66,7 @@ static void Gui_tickItemDrop_injection(unsigned char *this) {
 typedef void (*Gui_handleClick_t)(unsigned char *this, int32_t param_2, int32_t param_3, int32_t param_4);
 static Gui_handleClick_t Gui_handleClick = (Gui_handleClick_t) 0x2599c;
 
+// Block UI Interaction When Mouse Is Locked
 static void Gui_handleClick_injection(unsigned char *this, int32_t param_2, int32_t param_3, int32_t param_4) {
     if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
         // Call Original Method
@@ -98,6 +103,7 @@ static void set_is_survival(int new_is_survival) {
 typedef void (*Minecraft_setIsCreativeMode_t)(unsigned char *, int32_t);
 static Minecraft_setIsCreativeMode_t Minecraft_setIsCreativeMode = (Minecraft_setIsCreativeMode_t) 0x16ec4;
 
+// Handle Gamemode Switching
 static void Minecraft_setIsCreativeMode_injection(unsigned char *this, int32_t new_game_mode) {
     set_is_survival(!new_game_mode);
 
@@ -105,6 +111,7 @@ static void Minecraft_setIsCreativeMode_injection(unsigned char *this, int32_t n
     (*Minecraft_setIsCreativeMode)(this, new_game_mode);
 }
 
+// Get Custom Username
 static char *get_username() {
     char *username = getenv("MCPI_USERNAME");
     if (username == NULL) {
@@ -118,6 +125,7 @@ static Minecraft_init_t Minecraft_init = (Minecraft_init_t) 0x1700c;
 
 static int fancy_graphics;
 static int peaceful_mode;
+// Configure Options
 static void Minecraft_init_injection(unsigned char *this) {
     // Call Original Method
     (*Minecraft_init)(this);
@@ -157,6 +165,7 @@ int extra_has_feature(const char *name) {
     }
 }
 
+// Get Graphics Mode
 int extra_get_mode() {
     char *mode = getenv("MCPI_MODE");
     if (mode == NULL) {
@@ -172,10 +181,17 @@ int extra_get_mode() {
     }
 }
 
+// Enable Touch GUI
 static int32_t Minecraft_isTouchscreen(__attribute__((unused)) unsigned char *minecraft) {
     return 1;
 }
 
+// Store Smooth Lighting
+static int smooth_lighting;
+int extra_get_smooth_lighting() {
+    return smooth_lighting;
+}
+
 __attribute__((constructor)) static void init() {
     is_server = extra_get_mode() == 2;
     if (is_server) {
@@ -286,4 +302,11 @@ __attribute__((constructor)) static void init() {
         unsigned char invalid_item_background_patch[4] = {0x00, 0xf0, 0x20, 0xe3};
         patch((void *) 0x63c98, invalid_item_background_patch);
     }
+
+    smooth_lighting = extra_has_feature("Smooth Lighting");
+    if (smooth_lighting) {
+        // Enable Smooth Lighting
+        unsigned char smooth_lighting_patch[4] = {0x01, 0x00, 0x53, 0xe3};
+        patch((void *) 0x59ea4, smooth_lighting_patch);
+    }
 }

mods/src/extra.cpp

@@ -13,6 +13,7 @@
 #include <cstdio>
 
 extern "C" {
+    // Read Asset File
     static cxx11_string AppPlatform_readAssetFile(__attribute__((unused)) unsigned char *app_platform, std::string const& path) {
         std::string full_path("./data/");
         full_path.append(path);
@@ -27,6 +28,7 @@ extern "C" {
     typedef void (*Minecraft_setScreen_t)(unsigned char *, unsigned char *);
     static Minecraft_setScreen_t Minecraft_setScreen = (Minecraft_setScreen_t) 0x15d6c;
 
+    // Open Sign Screen
     static void LocalPlayer_openTextEdit(unsigned char *local_player, unsigned char *sign) {
         if (*(int *)(sign + 0x18) == 4) {
             unsigned char *minecraft = *(unsigned char **) (local_player + 0xc90);
@@ -42,6 +44,7 @@ extern "C" {
         return (key >= 32 && key <= 126) || key == BACKSPACE_KEY;
     }
 
+    // Store Text Input
     std::vector<char> input;
     void extra_key_press(char key) {
         if (is_valid_key(key)) {
@@ -58,8 +61,9 @@ extern "C" {
     typedef void (*Screen_keyboardNewChar_t)(unsigned char *screen, char key);
     typedef void (*Screen_keyPressed_t)(unsigned char *screen, int32_t key);
 
+    // Handle Text Input
     static void Screen_updateEvents_injection(unsigned char *screen) {
-        // Call Original
+        // Call Original Method
         (*Screen_updateEvents)(screen);
 
         if (*(char *)(screen + 4) == '\0') {

mods/src/extra.h

@@ -14,6 +14,8 @@ void extra_clear_input();
 
 void extra_set_is_right_click(int val);
 
+int extra_get_smooth_lighting();
+
 #ifdef __cplusplus
 }
 #endif