Bunch of changes + fixes

engine/src/rendering/imgui_renderer.cpp

@@ -91,12 +91,13 @@ void ImGuiRenderer::beginFrame() {
 }
 
 ImTextureID ImGuiRenderer::getTextureId(RenderTargetHandle handle) {
-  vk::ImageView view =
-      resources.renderTargetPool.get(handle).getImage().getView();
+  const RenderTarget& target = resources.renderTargetPool.get(handle);
+  vk::ImageView view = target.getImage().getView();
 
   auto it = textures.find(handle.index);
   if (it != textures.end()) {
-    if (it->second.generation == handle.generation && it->second.view == view) {
+    if (it->second.generation == handle.generation &&
+        it->second.version == target.getVersion()) {
       return (ImTextureID)it->second.descriptorSet;
     }
     ImGui_ImplVulkan_RemoveTexture(it->second.descriptorSet);
@@ -107,7 +108,8 @@ ImTextureID ImGuiRenderer::getTextureId(RenderTargetHandle handle) {
   // left in once the scene pass has finished.
   VkDescriptorSet descriptorSet = ImGui_ImplVulkan_AddTexture(
       static_cast<VkImageView>(view), VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
-  textures[handle.index] = {handle.generation, view, descriptorSet};
+  textures[handle.index] = {handle.generation, target.getVersion(),
+                            descriptorSet};
   return (ImTextureID)descriptorSet;
 }
 
@@ -120,7 +122,7 @@ void ImGuiRenderer::releaseStaleTextures() {
 
     bool stale =
         !renderTargetPool.isAlive(handle) ||
-        renderTargetPool.get(handle).getImage().getView() != it->second.view;
+        renderTargetPool.get(handle).getVersion() != it->second.version;
     if (stale) {
       ImGui_ImplVulkan_RemoveTexture(it->second.descriptorSet);
       it = textures.erase(it);

engine/src/rendering/imgui_renderer.hpp

@@ -37,7 +37,7 @@ class ImGuiRenderer {
 
   struct Texture {
     u32 generation;
-    vk::ImageView view;
+    u32 version;
     VkDescriptorSet descriptorSet;
   };
 

engine/src/resources/render_target.cpp

@@ -39,6 +39,7 @@ void RenderTarget::applyPendingResize() {
 }
 
 void RenderTarget::create(u32 width, u32 height) {
+  this->version++;
   this->image = Image::Builder(this->device)
                     .setExtent(width, height)
                     .setFormat(this->format)

engine/src/resources/render_target.hpp

@@ -27,6 +27,7 @@ class RenderTarget {
   Image& getImage() const { return *this->image; }
 
   vk::Extent2D getExtent() const;
+  u32 getVersion() const { return this->version; }
 
   void requestResize(u32 width, u32 height);
 
@@ -46,6 +47,7 @@ class RenderTarget {
   std::unique_ptr<Image> image;
 
   std::optional<vk::Extent2D> pendingExtent;
+  u32 version = 0;
 };
 
 }  // namespace sophia

engine/src/scene/scene.cpp

@@ -16,6 +16,24 @@ Entity Scene::createEntity(const std::string& name) {
   return entity;
 }
 
+Entity Scene::createCamera(const std::string& name) {
+  Entity camera = createEntity(name);
+  camera.addComponent<CameraComponent>();
+  if (this->activeCamera == entt::null) {
+    this->activeCamera = camera;
+  }
+  return camera;
+}
+
+Entity Scene::getActiveCamera() {
+  if (this->activeCamera == entt::null) {
+    return {};
+  }
+  return {this->activeCamera, this};
+}
+
+void Scene::setActiveCamera(Entity camera) { this->activeCamera = camera; }
+
 void Scene::destroyEntity(Entity entity) {
   if (this->activeCamera == entity) {
     this->activeCamera = entt::null;