add canvas:create_texture(...)

src/assets/Assets.hpp

@@ -72,6 +72,11 @@ public:
         assets[typeid(T)][name].reset(asset.release());
     }
 
+    template <class T>
+    void store(std::shared_ptr<T> asset, const std::string& name) {
+        assets[typeid(T)][name] = std::move(asset);
+    }
+
     template <class T>
     T* get(const std::string& name) const {
         const auto& mapIter = assets.find(typeid(T));

src/logic/scripting/lua/lua_custom_types.hpp

@@ -118,6 +118,12 @@ namespace lua {
             return mTexture != nullptr;
         }
 
+        auto shareTexture() const {
+            return mTexture;
+        }
+
+        void createTexture();
+
         static int createMetatable(lua::State*);
         inline static std::string TYPENAME = "Canvas";
     private:

src/logic/scripting/lua/usertypes/lua_type_canvas.cpp

@@ -4,6 +4,8 @@
 #include "graphics/core/Texture.hpp"
 #include "logic/scripting/lua/lua_custom_types.hpp"
 #include "logic/scripting/lua/lua_util.hpp"
+#include "engine/Engine.hpp"
+#include "assets/Assets.hpp"
 
 using namespace lua;
 
@@ -13,6 +15,10 @@ LuaCanvas::LuaCanvas(
     : mTexture(std::move(inTexture)), mData(std::move(inData)) {
 }
 
+void LuaCanvas::createTexture() {
+    mTexture = Texture::from(mData.get());
+}
+
 union RGBA {
     struct {
         uint8_t r, g, b, a;
@@ -166,6 +172,19 @@ static int l_update(State* L) {
     return 0;
 }
 
+static int l_create_texture(State* L) {
+    if (auto canvas = touserdata<LuaCanvas>(L, 1)) {
+        if (!canvas->hasTexture()) {
+            canvas->createTexture();
+        }
+        if (canvas->hasTexture()) {
+            std::string name = require_string(L, 2);
+            scripting::engine->getAssets()->store(canvas->shareTexture(), name);
+        }
+    }
+    return 0;
+}
+
 static std::unordered_map<std::string, lua_CFunction> methods {
     {"at", lua::wrap<l_at>},
     {"set", lua::wrap<l_set>},
@@ -173,6 +192,7 @@ static std::unordered_map<std::string, lua_CFunction> methods {
     {"blit", lua::wrap<l_blit>},
     {"clear", lua::wrap<l_clear>},
     {"update", lua::wrap<l_update>},
+    {"create_texture", lua::wrap<l_create_texture>},
     {"_set_data", lua::wrap<l_set_data>},
 };