WIP UI Scale Slider

launcher/src/client/cache.cpp

@@ -17,6 +17,57 @@ static std::string get_cache_path() {
 }
 
 // Load
+static void read_cache(std::ifstream &stream, State &ret) {
+    // Cache Version
+    unsigned char cache_version;
+    stream.read((char *) &cache_version, 1);
+    if (stream.eof()) {
+        // Unable To Read Version
+        WARN("Unable To Read Launcher Cache Version");
+        return;
+    }
+
+    // Support Older Versions
+    bool load_gui_scale = true;
+    if (cache_version == 0) {
+        // Pre-v3.0.0 Cache
+        load_gui_scale = false;
+    } else if (cache_version != (unsigned char) CACHE_VERSION) {
+        // Invalid Version
+        WARN("Invalid Launcher Cache Version (Expected: %i, Actual: %i)", CACHE_VERSION, (int) cache_version);
+        return;
+    }
+
+    // Load Username And Render Distance
+    State state;
+    std::getline(stream, state.username, '\0');
+    std::getline(stream, state.render_distance, '\0');
+    if (load_gui_scale) {
+        stream.read((char *) &state.gui_scale, sizeof(float));
+    }
+
+    // Load Feature Flags
+    std::unordered_map<std::string, bool> flags;
+    std::string flag;
+    while (!stream.eof() && std::getline(stream, flag, '\0')) {
+        if (!flag.empty()) {
+            bool is_enabled = false;
+            stream.read((char *) &is_enabled, sizeof(bool));
+            flags[flag] = is_enabled;
+        }
+        stream.peek();
+    }
+    state.flags.from_cache(flags);
+
+    // Check For Error
+    if (!stream) {
+        WARN("Failure While Loading Launcher Cache");
+        return;
+    }
+
+    // Success
+    ret = state;
+}
 State load_cache() {
     // Log
     DEBUG("Loading Launcher Cache...");
@@ -35,42 +86,8 @@ State load_cache() {
         // Lock File
         int lock_fd = lock_file(get_cache_path().c_str());
 
-        // Check Version
+        // Load
-        unsigned char cache_version;
+        read_cache(stream, ret);
-        stream.read((char *) &cache_version, 1);
-        if (stream.eof()) {
-            // Unable To Read Version
-            WARN("Unable To Read Launcher Cache Version");
-        } else if (cache_version != (unsigned char) CACHE_VERSION) {
-            // Invalid Version
-            WARN("Invalid Launcher Cache Version (Expected: %i, Actual: %i)", CACHE_VERSION, (int) cache_version);
-        } else {
-            // Load Username And Render Distance
-            State state;
-            std::getline(stream, state.username, '\0');
-            std::getline(stream, state.render_distance, '\0');
-
-            // Load Feature Flags
-            std::unordered_map<std::string, bool> flags;
-            std::string flag;
-            while (!stream.eof() && std::getline(stream, flag, '\0')) {
-                if (!flag.empty()) {
-                    bool is_enabled = false;
-                    stream.read((char *) &is_enabled, sizeof(bool));
-                    flags[flag] = is_enabled;
-                }
-                stream.peek();
-            }
-            state.flags.from_cache(flags);
-
-            // Check For Error
-            if (!stream) {
-                WARN("Failure While Loading Launcher Cache");
-            } else {
-                // Success
-                ret = state;
-            }
-        }
 
         // Close
         stream.close();
@@ -84,9 +101,26 @@ State load_cache() {
 }
 
 // Save
-static void write_env_to_stream(std::ofstream &stream, const std::string &value) {
+static void write_env_to_stream(std::ostream &stream, const std::string &value) {
     stream.write(value.c_str(), int(value.size()) + 1);
 }
+void write_cache(std::ostream &stream, const State &state) {
+    // Save Cache Version
+    constexpr unsigned char cache_version = CACHE_VERSION;
+    stream.write((const char *) &cache_version, 1);
+
+    // Save Username And Render Distance
+    write_env_to_stream(stream, state.username);
+    write_env_to_stream(stream, state.render_distance);
+    stream.write((const char *) &state.gui_scale, sizeof(float));
+
+    // Save Feature Flags
+    const std::unordered_map<std::string, bool> flags_cache = state.flags.to_cache();
+    for (const std::pair<const std::string, bool> &it : flags_cache) {
+        stream.write(it.first.c_str(), int(it.first.size()) + 1);
+        stream.write((const char *) &it.second, sizeof(bool));
+    }
+}
 void save_cache(const State &state) {
     // Log
     DEBUG("Saving Launcher Cache...");
@@ -98,22 +132,10 @@ void save_cache(const State &state) {
         WARN("Unable To Open Launcher Cache For Saving");
     } else {
         // Lock File
-        int lock_fd = lock_file(get_cache_path().c_str());
+        const int lock_fd = lock_file(get_cache_path().c_str());
 
-        // Save Cache Version
+        // Write
-        constexpr unsigned char cache_version = CACHE_VERSION;
+        write_cache(stream, state);
-        stream.write((const char *) &cache_version, 1);
-
-        // Save Username And Render Distance
-        write_env_to_stream(stream, state.username);
-        write_env_to_stream(stream, state.render_distance);
-
-        // Save Feature Flags
-        const std::unordered_map<std::string, bool> flags_cache = state.flags.to_cache();
-        for (const std::pair<const std::string, bool> &it : flags_cache) {
-            stream.write(it.first.c_str(), int(it.first.size()) + 1);
-            stream.write((const char *) &it.second, sizeof(bool));
-        }
 
         // Finish
         stream.close();

launcher/src/client/cache.h

@@ -1,13 +1,16 @@
 #pragma once
 
+#include <ostream>
+
 // Cache Version
-#define CACHE_VERSION 0
+#define CACHE_VERSION 1
 
 // Load Cache
 struct State;
 State load_cache();
 
 // Save Cache
+void write_cache(std::ostream &stream, const State &state);
 void save_cache(const State &state);
 
 // Wipe Cache

launcher/src/client/configuration.cpp

@@ -1,6 +1,7 @@
+#include <sstream>
+
 #include <libreborn/env.h>
 
-#include "../util/util.h"
 #include "configuration.h"
 #include "cache.h"
 
@@ -8,17 +9,17 @@
 State::State(): flags("") {
     username = DEFAULT_USERNAME;
     render_distance = DEFAULT_RENDER_DISTANCE;
+    gui_scale = AUTO_GUI_SCALE;
     flags = Flags::get();
 }
 template <typename T>
 static void update_from_env(const char *env, T &value, const bool save) {
     if (save) {
-        const std::string str = static_cast<std::string>(value);
+        set_and_print_env(env, obj_to_env_value(value).c_str());
-        set_and_print_env(env, str.c_str());
     } else {
         const char *env_value = getenv(env);
         if (env_value != nullptr) {
-            value = env_value;
+            env_value_to_obj(value, env_value);
         }
     }
 }
@@ -26,11 +27,14 @@ void State::update(const bool save) {
     update_from_env(MCPI_FEATURE_FLAGS_ENV, flags, save);
     update_from_env(MCPI_USERNAME_ENV, username, save);
     update_from_env(MCPI_RENDER_DISTANCE_ENV, render_distance, save);
+    update_from_env(MCPI_GUI_SCALE_ENV, gui_scale, save);
 }
 bool State::operator==(const State &other) const {
-#define test(x) static_cast<std::string>(x) == static_cast<std::string>(other.x)
+    std::ostringstream one;
-    return test(username) && test(render_distance) && test(flags);
+    write_cache(one, *this);
-#undef test
+    std::ostringstream two;
+    write_cache(two, other);
+    return one.str() == two.str();
 }
 
 // Handle Non-Launch Commands

launcher/src/client/configuration.h

@@ -11,6 +11,7 @@
 // Default Configuration
 #define DEFAULT_USERNAME "StevePi"
 #define DEFAULT_RENDER_DISTANCE "Short"
+#define AUTO_GUI_SCALE 0
 
 // State
 struct State {
@@ -21,6 +22,7 @@ struct State {
     // Properties
     std::string username;
     std::string render_distance;
+    float gui_scale;
     Flags flags;
 };
 

launcher/src/client/ui.cpp

@@ -16,9 +16,9 @@ static constexpr std::array render_distances = {
 };
 
 // Tooltips/Text
-static constexpr std::string revert_text = "Revert";
+static const char *revert_text = "Revert";
-static constexpr std::string revert_tooltip_text = "Last Saved";
+static const char *revert_tooltip_text = "Last Saved";
-static constexpr std::string make_tooltip(const std::string &text, const std::string &type) {
+static std::string make_tooltip(const std::string &text, const std::string &type) {
     return "Use " + text + ' ' + type;
 }
 
@@ -123,20 +123,35 @@ int ConfigurationUI::get_render_distance_index() const {
 }
 void ConfigurationUI::draw_main() const {
     const ImGuiStyle &style = ImGui::GetStyle();
-    const char *labels[] = {"Username", "Render Distance"};
+    const char *labels[] = {"Username", "Render Distance", "UI Scale"};
     // Calculate Label Size
     float label_size = 0;
     for (const char *label : labels) {
         label_size = std::max(label_size, ImGui::CalcTextSize(label).x + style.ItemInnerSpacing.x);
     }
     ImGui::PushItemWidth(-label_size);
-    // Options
+    // Username
     ImGui::InputText(labels[0], &state.username);
+    // Render Distance
     int render_distance_index = get_render_distance_index();
     if (ImGui::Combo(labels[1], &render_distance_index, render_distances.data(), int(render_distances.size()))) {
         state.render_distance = render_distances[render_distance_index];
     }
+    // UI Scale
+    std::string scale_format = "%i";
+    scale_format += 'x';
+    if (state.gui_scale <= AUTO_GUI_SCALE) {
+        scale_format = "Auto";
+    }
+    int gui_scale_int = int(state.gui_scale);
+    if (ImGui::SliderInt(labels[2], &gui_scale_int, 0, 8, scale_format.c_str())) {
+        state.gui_scale = float(gui_scale_int);
+        if (state.gui_scale < AUTO_GUI_SCALE) {
+            state.gui_scale = AUTO_GUI_SCALE;
+        }
+    }
     ImGui::PopItemWidth();
+    // Launcher Cache
     ImGui::Checkbox("Save Settings On Launch", &save_settings);
 }
 
@@ -193,7 +208,7 @@ void ConfigurationUI::draw_servers() {
     // Revert/Save
     int clicked_button = -1;
     ImGui::BeginDisabled(!are_servers_unsaved());
-    draw_right_aligned_buttons({revert_text.c_str(), "Save"}, [&clicked_button](const int id, const bool was_clicked) {
+    draw_right_aligned_buttons({revert_text, "Save"}, [&clicked_button](const int id, const bool was_clicked) {
         if (id == 0) {
             ImGui::SetItemTooltip("%s", make_tooltip(revert_tooltip_text, "Server List").c_str());
         }

libreborn/include/libreborn/env.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <string>
+
 #define ENV(name, ...) extern const char *const name##_ENV;
 #include "env-list.h"
 #undef ENV
@@ -9,3 +11,12 @@ void clear_internal_env_vars();
 
 // Set Environmental Variable
 void set_and_print_env(const char *name, const char *value);
+
+// Convert Variable To Value And Vice-Versa
+struct Flags;
+std::string obj_to_env_value(const std::string &obj);
+std::string obj_to_env_value(const float &obj);
+std::string obj_to_env_value(const Flags &obj);
+void env_value_to_obj(std::string &out, const char *value);
+void env_value_to_obj(float &out, const char *value);
+void env_value_to_obj(Flags &out, const char *value);

libreborn/include/libreborn/flags.h

@@ -36,8 +36,9 @@ struct Flags {
     explicit Flags(const std::string &data);
     static Flags get();
     // To/From Strings
-    explicit operator std::string() const;
+    std::string to_string() const;
-    Flags &operator=(const std::string &str);
+    void from_string(const std::string &str);
+    bool operator==(const Flags &other) const;
     // To/From Cache
     [[nodiscard]] std::unordered_map<std::string, bool> to_cache() const;
     void from_cache(const std::unordered_map<std::string, bool> &cache);

libreborn/src/util/env.cpp

@@ -1,6 +1,7 @@
 #include <libreborn/env.h>
 #include <libreborn/exec.h>
 #include <libreborn/log.h>
+#include <libreborn/flags.h>
 
 // Define Constants
 #define ENV(name, ...) const char *const name##_ENV = #name;
@@ -36,3 +37,23 @@ void set_and_print_env(const char *name, const char *value) {
     // Print New Value
     DEBUG("Set %s = %s", name, value != NULL ? value : "(unset)");
 }
+
+// Conversion
+std::string obj_to_env_value(const std::string &obj) {
+    return obj;
+}
+std::string obj_to_env_value(const float &obj) {
+    return std::to_string(obj);
+}
+std::string obj_to_env_value(const Flags &obj) {
+    return obj.to_string();
+}
+void env_value_to_obj(std::string &out, const char *value) {
+    out = value;
+}
+void env_value_to_obj(float &out, const char *value) {
+    out = strtof(value, nullptr);
+}
+void env_value_to_obj(Flags &out, const char *value) {
+    out.from_string(value);
+}

libreborn/src/util/flags/flags.cpp

@@ -62,7 +62,7 @@ Flags::Flags(const std::string &data) {
         }
     });
 }
-Flags::operator std::string() const {
+std::string Flags::to_string() const {
     std::string out;
     root.for_each_const([&out](const FlagNode &flag) {
         if (flag.value) {
@@ -74,7 +74,7 @@ Flags::operator std::string() const {
     });
     return out;
 }
-Flags &Flags::operator=(const std::string &str) {
+void Flags::from_string(const std::string &str) {
     // Find Flags To Enable
     std::unordered_set<std::string> to_enable;
     std::stringstream stream(str);
@@ -88,7 +88,9 @@ Flags &Flags::operator=(const std::string &str) {
     root.for_each([&to_enable](FlagNode &flag) {
         flag.value = to_enable.contains(flag.name);
     });
-    return *this;
+}
+bool Flags::operator==(const Flags &other) const {
+    return to_string() == other.to_string();
 }
 std::unordered_map<std::string, bool> Flags::to_cache() const {
     std::unordered_map<std::string, bool> out;

mods/src/feature/feature.cpp

@@ -20,7 +20,7 @@ bool _feature_has(const char *name, const int server_default) {
     if (!loaded) {
         const char *env = getenv(MCPI_FEATURE_FLAGS_ENV);
         if (env) {
-            flags = env;
+            flags.from_string(env);
         }
         loaded = true;
     }

mods/src/misc/ui.cpp

@@ -15,9 +15,8 @@
 // Heart Food Overlay
 static int heal_amount = 0, heal_amount_drawing = 0;
 static void Gui_renderHearts_injection(Gui_renderHearts_t original, Gui *gui) {
-    // Get heal_amount
+    // Calculate heal_amount
     heal_amount = heal_amount_drawing = 0;
-
     Inventory *inventory = gui->minecraft->player->inventory;
     const ItemInstance *held_ii = inventory->getSelected();
     if (held_ii) {
@@ -30,7 +29,7 @@ static void Gui_renderHearts_injection(Gui_renderHearts_t original, Gui *gui) {
         }
     }
 
-    // Call original
+    // Call Original Method
     original(gui);
 }
 #define PINK_HEART_FULL 70
@@ -306,13 +305,16 @@ void _init_misc_ui() {
     // Custom GUI Scale
     const char *gui_scale_str = getenv(MCPI_GUI_SCALE_ENV);
     if (gui_scale_str != nullptr) {
-        unsigned char nop_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop"
+        float gui_scale;
-        patch((void *) 0x173e8, nop_patch);
+        env_value_to_obj(gui_scale, gui_scale_str);
-        patch((void *) 0x173f0, nop_patch);
+        if (gui_scale > 0) {
-        const float gui_scale = strtof(gui_scale_str, nullptr);
+            unsigned char nop_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop"
-        uint32_t gui_scale_raw;
+            patch((void *) 0x173e8, nop_patch);
-        memcpy(&gui_scale_raw, &gui_scale, sizeof (gui_scale_raw));
+            patch((void *) 0x173f0, nop_patch);
-        patch_address((void *) 0x17520, (void *) gui_scale_raw);
+            uint32_t gui_scale_raw;
+            memcpy(&gui_scale_raw, &gui_scale, sizeof (gui_scale_raw));
+            patch_address((void *) 0x17520, (void *) gui_scale_raw);
+        }
     }
 
     // Don't Wrap Text On '\r' Or '\t' Because They Are Actual Characters In MCPI

mods/src/title-screen/splashes.cpp

@@ -103,7 +103,7 @@ static bool draw_splash(StartMenuScreen *screen, const float y_factor, const boo
     const int text_width = screen->font->width(current_splash);
     float splash_width = float(text_width) * scale;
     if (splash_width > float(max_width)) {
-        const float multiplier = (float(max_width) / splash_width);
+        const float multiplier = float(max_width) / splash_width;
         scale *= multiplier;
         splash_width *= multiplier;
     }