Slang actually worked.

src/dawn/component/display/material/SimpleTexturedMaterial.cpp

@@ -23,7 +23,7 @@ void SimpleTexturedMaterial::load(std::shared_ptr<SceneLoadContext> ctx) {
 }
 
 struct Color SimpleTexturedMaterial::getColor() {
-  return this->data.color;
+  return this->data.data.color;
 }
 
 std::shared_ptr<Texture> SimpleTexturedMaterial::getTexture() {
@@ -37,25 +37,25 @@ void SimpleTexturedMaterial::setTexture(
 }
 
 void SimpleTexturedMaterial::setColor(const struct Color color) {
-  this->data.color = color;
+  this->data.data.color = color;
 }
 
 std::vector<std::shared_ptr<IRenderPass>> SimpleTexturedMaterial::getPasses(
   struct RenderPassContext &ctx
 ) {
-  this->data.model = this->getItem()->getWorldTransform();
-  this->data.projection = ctx.camera->getProjection();
-  this->data.view = ctx.camera->getItem()->getWorldTransform();
+  this->data.data.model = this->getItem()->getWorldTransform();
+  this->data.data.projection = ctx.camera->getProjection();
+  this->data.data.view = ctx.camera->getItem()->getWorldTransform();
   auto textures = std::unordered_map<
     shadertexturebinding_t, std::shared_ptr<Texture>
   >();
   
   if(this->texture) {
-    this->data.hasTexture = true;
+    this->data.data.hasTexture = true;
     this->data.texture = 0;
     textures[this->data.texture] = this->texture;
   } else {
-    this->data.hasTexture = false;
+    this->data.data.hasTexture = false;
   }
 
   return {

src/dawn/display/shader/ShaderManager.hpp

@@ -9,7 +9,7 @@
 namespace Dawn {
   class ShaderManager {
     private:
-      std::vector<std::weak_ptr<IShaderBase>> shaders;
+      std::vector<std::shared_ptr<IShaderBase>> shaders;
 
     public:
       /**
@@ -23,7 +23,8 @@ namespace Dawn {
       std::shared_ptr<T> getShader() {
         auto itShaders = shaders.begin();
         while(itShaders != shaders.end()) {
-          auto shader = itShaders->lock();
+          // auto shader = itShaders->lock();
+          auto shader = *itShaders;
           if(!shader) {
             itShaders = shaders.erase(itShaders);
             continue;