feat: add canvas rework

editor/include/editor/CanvasView.h

@@ -0,0 +1,45 @@
+#ifndef EDITOR_CANVASVIEW_H
+#define EDITOR_CANVASVIEW_H
+
+#include <glm/glm.hpp>
+
+#include <destrum/Components/UI/CanvasFrame.h>
+
+class GameObject;
+class RectGizmo;
+class Scene;
+struct ImDrawList;
+
+class CanvasView final {
+public:
+    [[nodiscard]] bool IsEnabled() const { return m_Enabled; }
+    void SetEnabled(bool enabled);
+    void Toggle() { SetEnabled(!m_Enabled); }
+
+    [[nodiscard]] bool ShowsScene() const { return m_ShowScene; }
+    [[nodiscard]] bool IsPanning() const { return m_Panning; }
+    [[nodiscard]] CanvasFrame GetFrame() const;
+
+    void SetDrawImageSize(const glm::vec2& size);
+    void Fit();
+
+    bool HandleInput(const glm::vec2& mousePixel, const glm::vec2& pixelsPerPoint, bool hovered);
+    void SubmitBackdrop() const;
+    void DrawOverlay(ImDrawList& drawList, const glm::vec2& viewMin, const glm::vec2& viewScale) const;
+    void DrawToolbar(RectGizmo& gizmo);
+
+    [[nodiscard]] static GameObject* Pick(Scene& scene, const glm::vec2& pixel);
+
+private:
+    bool m_Enabled{false};
+    bool m_ShowScene{false};
+    bool m_Fitted{true};
+    bool m_Panning{false};
+    int m_Preset{0};
+    glm::ivec2 m_Resolution{1920, 1080};
+    glm::vec2 m_DrawImageSize{1.0f};
+    glm::vec2 m_FrameMin{0.0f};
+    float m_Zoom{1.0f};
+};
+
+#endif // EDITOR_CANVASVIEW_H

editor/include/editor/Editor.h

@@ -11,6 +11,7 @@
 #include <destrum/AppLayer.h>
 
 #include <editor/AssetBrowser.h>
+#include <editor/CanvasView.h>
 #include <editor/EditorCamera.h>
 #include <editor/PlayMode.h>
 #include <editor/RectGizmo.h>
@@ -44,6 +45,7 @@ public:
     [[nodiscard]] Camera* viewCamera() override;
     [[nodiscard]] bool hostsViewport() const override { return true; }
     [[nodiscard]] InputFocus gameInputFocus() const override;
+    [[nodiscard]] std::optional<CanvasFrame> canvasFrame() const override;
 
     bool OpenScene(std::string_view path);
     bool SaveScene();
@@ -81,7 +83,8 @@ private:
 
     // Editor.cpp
     [[nodiscard]] Scene* CurrentScene() const;
-    [[nodiscard]] bool UsesEditorCamera();
+    [[nodiscard]] bool UsesEditorCamera() const;
+    [[nodiscard]] bool CanvasViewActive() const;
     void HandleShortcuts();
     void Undo();
     void Redo();
@@ -126,6 +129,7 @@ private:
     ResourcesInspector m_ResourcesInspector;
     TransformGizmo m_TransformGizmo;
     RectGizmo m_RectGizmo;
+    CanvasView m_CanvasView;
     ShaderHotReload m_ShaderHotReload;
 
     Panels m_Panels;