Batch Font Rendering

docs/CHANGELOG.md

@@ -58,6 +58,7 @@
     * `Close Editor When Sign Is Destroyed` (Enabled By Default)
     * `Remove Chest Placement Restrictions` (Enabled By Default)
     * `Fix Hanging When No Valid Spawn Point Exists` (Enabled By Default)
+    * `Batch Font Rendering` (Enabled By Default)
   * Existing Functionality (All Enabled By Default)
     * `Fix Screen Rendering When Hiding HUD`
     * `Sanitize Usernames`

libreborn/src/util/env/flags/available-feature-flags

@@ -49,6 +49,7 @@ CATEGORY Rendering
         TRUE Optimized Chunk Sorting
         TRUE Multidraw Rendering
         TRUE Increase Render Chunk Size
+        TRUE Batch Font Rendering
     CATEGORY Camera
         TRUE Enable Camera Rendering
         TRUE Render Camera Legs

mods/src/misc/ui.cpp

@@ -280,6 +280,22 @@ static void Minecraft_setSize_injection(Minecraft_setSize_t original, Minecraft
     original(self, width, height);
 }
 
+// Batch Font Rendering
+template <typename... Args>
+static void Font_draw_injection(const std::function<void(Args...)> &original, Args... args) {
+    Tesselator &t = Tesselator::instance;
+    const bool was_already_overridden = t.void_begin_end;
+    if (!was_already_overridden) {
+        t.begin(GL_QUADS);
+        t.voidBeginAndEndCalls(true);
+    }
+    original(std::forward<Args>(args)...);
+    if (!was_already_overridden) {
+        t.voidBeginAndEndCalls(false);
+        t.draw();
+    }
+}
+
 // Init
 void _init_misc_ui() {
     // Food Overlay
@@ -392,4 +408,11 @@ void _init_misc_ui() {
         // Fix Signs
         overwrite_calls(LocalPlayer_openTextEdit, LocalPlayer_openTextEdit_injection);
     }
+
+    // Batch Font Rendering
+    if (feature_has("Batch Font Rendering", server_disabled)) {
+        overwrite_calls(Font_drawSlow, Font_draw_injection<Font *, const char *, float, float, unsigned int, bool>);
+        overwrite_calls(Font_drawShadow, Font_draw_injection<Font *, const std::string &, float, float, unsigned int>);
+        overwrite_calls(Font_drawShadow_raw, Font_draw_injection<Font *, const char *, float, float, unsigned int>);
+    }
 }