From 5e3b5dd86e77e817b312504dee4336bb4f7a08ef Mon Sep 17 00:00:00 2001
From: Dario <dariosamo@gmail.com>
Date: Sat, 27 Jul 2024 12:12:54 -0300
Subject: [PATCH] Add a placeholder mod loader for texture packs.

---
 include/zelda_render.h           |  2 ++
 lib/rt64                         |  2 +-
 src/main/rt64_render_context.cpp | 40 ++++++++++++++++++++++++++++++++
 src/ui/ui_launcher.cpp           |  2 +-
 4 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/include/zelda_render.h b/include/zelda_render.h
index 684672b..884f374 100644
--- a/include/zelda_render.h
+++ b/include/zelda_render.h
@@ -26,9 +26,11 @@ namespace zelda64 {
             uint32_t get_display_framerate() const override;
             float get_resolution_scale() const override;
             void load_shader_cache(std::span<const char> cache_binary) override;
+            bool load_texture_packs();
 
         protected:
             std::unique_ptr<RT64::Application> app;
+            bool texture_packs_checked = false;
         };
 
         std::unique_ptr<ultramodern::renderer::RendererContext> create_render_context(uint8_t *rdram, ultramodern::renderer::WindowHandle window_handle, bool developer_mode);
diff --git a/lib/rt64 b/lib/rt64
index 88c618c..6853ac4 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit 88c618c1f8d8089f94e78537e49e0d77798fc0be
+Subproject commit 6853ac4c35dab2190060bb4c9c399a9ca369a508
diff --git a/src/main/rt64_render_context.cpp b/src/main/rt64_render_context.cpp
index 497e504..3954be1 100644
--- a/src/main/rt64_render_context.cpp
+++ b/src/main/rt64_render_context.cpp
@@ -8,6 +8,7 @@
 #include "ultramodern/ultramodern.hpp"
 #include "ultramodern/config.hpp"
 
+#include "zelda_config.h"
 #include "zelda_render.h"
 #include "recomp_ui.h"
 
@@ -285,7 +286,46 @@ zelda64::renderer::RT64Context::RT64Context(uint8_t* rdram, ultramodern::rendere
 
 zelda64::renderer::RT64Context::~RT64Context() = default;
 
+bool zelda64::renderer::RT64Context::load_texture_packs() {
+    const std::u8string RTZExtension(u8".rtz");
+    std::filesystem::path mods_folder_path = zelda64::get_app_folder_path() / "mods" / "mm";
+    if (!std::filesystem::exists(mods_folder_path)) {
+        return true;
+    }
+
+    std::vector<RT64::ReplacementDirectory> replacement_directories;
+    for (std::filesystem::directory_entry entry : std::filesystem::directory_iterator(mods_folder_path)) {
+        if (!entry.is_regular_file()) {
+            continue;
+        }
+
+        std::filesystem::path path = entry.path();
+        std::u8string ext = path.extension().u8string();
+        std::transform(ext.begin(), ext.end(), ext.begin(), [](char8_t c) { return std::tolower(c); });
+        if (ext != RTZExtension) {
+            continue;
+        }
+
+        replacement_directories.emplace_back(path);
+    }
+
+    if (!replacement_directories.empty()) {
+        return app->textureCache->loadReplacementDirectories(replacement_directories);
+    }
+    else {
+        return true;
+    }
+}
+
 void zelda64::renderer::RT64Context::send_dl(const OSTask* task) {
+    if (!texture_packs_checked) {
+        if (!load_texture_packs()) {
+            ultramodern::error_handling::message_box("One or more texture packs could not be loaded successfully. Make sure the files are not corrupt.\n\nNo texture packs will be loaded in the game.");
+        }
+
+        texture_packs_checked = true;
+    }
+
     app->state->rsp->reset();
     app->interpreter->loadUCodeGBI(task->t.ucode & 0x3FFFFFF, task->t.ucode_data & 0x3FFFFFF, true);
     app->processDisplayLists(app->core.RDRAM, task->t.data_ptr & 0x3FFFFFF, 0, true);
diff --git a/src/ui/ui_launcher.cpp b/src/ui/ui_launcher.cpp
index b4b6312..52847e0 100644
--- a/src/ui/ui_launcher.cpp
+++ b/src/ui/ui_launcher.cpp
@@ -6,7 +6,7 @@
 #include "nfd.h"
 #include <filesystem>
 
-std::string version_number = "v1.1.1";
+std::string version_number = "v1.1.1-texturepacks";
 
 Rml::DataModelHandle model_handle;
 bool mm_rom_valid = false;