feat: move rendering to an imgui window

destrum/include/destrum/App.h

@@ -51,6 +51,8 @@ public:
     virtual void customFixedUpdate(float dt) = 0;
 
     virtual void onWindowResize(int, int) {};
+    virtual void onViewportResize(int, int) {}
+    virtual void drawViewportOverlay() {}
 
     virtual void onPlayModeChanged(bool) {}
 
@@ -61,6 +63,15 @@ public:
 
     virtual void customWindowsMenu() {}
 
+    struct ViewportRect {
+        glm::vec2 min{0.0f};
+        glm::vec2 size{0.0f};
+    };
+
+    [[nodiscard]] bool usesEditorViewport() const { return m_params.showDebugUi; }
+    [[nodiscard]] const ViewportRect& getViewportRect() const { return viewportRect; }
+    void claimViewportMouse() { viewportMouseClaimed = true; }
+
 protected:
     Window window;
     AppParams m_params{};
@@ -105,6 +116,16 @@ protected:
     void drawPhysicsPanel(float dt, float fixedDt, float accumulator);
 
 private:
+    void drawDockSpace();
+    void drawViewportWindow();
+    void applyViewportResize();
+
+    ViewportRect viewportRect{};
+    glm::ivec2 viewportDesiredSize{0};
+    bool viewportHovered{false};
+    bool viewportFocused{false};
+    bool viewportMouseClaimed{false};
+
     void drawPlayControls();
     void applyPlayModeToggle();
     bool enterPlayMode();

destrum/include/destrum/Graphics/GfxDevice.h

@@ -52,6 +52,7 @@ public:
         VkClearColorValue clearColor{{0.f, 0.f, 0.f, 1.f}};
         glm::ivec4 drawImageBlitRect{};
         ImguiPass* imguiPass{nullptr};
+        bool copyDrawImageToSwapchain{true};
     };
 
 public:

destrum/include/destrum/Util/RectGizmo.h

@@ -9,16 +9,17 @@ class RectGizmo final {
 public:
     [[nodiscard]] static bool CanManipulate(GameObject& object);
 
-    // drawImageSize is what the canvas renders into, it is stretched over the main ImGui viewport
-    bool Manipulate(GameObject& object, const glm::vec2& drawImageSize);
+    bool Manipulate(GameObject& object, const glm::vec2& drawImageSize, const glm::vec2& viewMin, const glm::vec2& viewSize);
 
     [[nodiscard]] bool IsUsing() const { return m_ActiveHandle >= 0; }
+    [[nodiscard]] bool IsInteracting() const { return m_ActiveHandle >= 0 || m_Hovered; }
 
     bool snap{false};
     float snapStep{5.0f};
 
 private:
     int m_ActiveHandle{-1};
+    bool m_Hovered{false};
     glm::vec2 m_DragStartMouse{0.0f};
     glm::vec2 m_DragStartPosition{0.0f};
     glm::vec2 m_DragStartSize{0.0f};

destrum/include/destrum/Util/TransformGizmo.h

@@ -1,6 +1,8 @@
 #ifndef DESTRUM_TRANSFORMGIZMO_H
 #define DESTRUM_TRANSFORMGIZMO_H
 
+#include <glm/glm.hpp>
+
 class Camera;
 class GameObject;
 
@@ -19,7 +21,7 @@ class TransformGizmo final {
 public:
     void HandleShortcuts();
     void DrawToolbar();
-    bool Manipulate(GameObject& object, const Camera& camera);
+    bool Manipulate(GameObject& object, const Camera& camera, const glm::vec2& viewMin, const glm::vec2& viewSize);
 
     [[nodiscard]] bool IsUsing() const;
     [[nodiscard]] bool IsOver() const;