1 files changed, 56 insertions, 0 deletions
diff --git a/src/rendering/renderer_backend.h b/src/rendering/renderer_backend.h
new file mode 100644
index 0000000..51da214
--- /dev/null
+++ b/src/rendering/renderer_backend.h
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <glm/glm.hpp>
+#include <functional>
+#include <string>
+#include <vector>
+
+namespace Donut
+{
+    struct SceneObject
+    {
+        glm::vec3 position = { 0.0f, 2.0f, 0.0f };
+        float     radius   = 2.0f;
+        glm::vec3 color    = { 0.85f, 0.35f, 0.2f };
+    };
+
+    struct BlackHoleParams
+    {
+        float disk_inner_rs = 3.0f;
+        float disk_outer_rs = 12.0f;
+        float temperature   = 4800.0f;
+        float brightness    = 0.9f;
+        float turbulence    = 0.4f;
+        int   quality_steps = 15000;
+        float fov_degrees   = 60.0f;
+    };
+
+    class RendererBackend
+    {
+    public:
+        virtual ~RendererBackend() = default;
+
+        virtual auto init(void* glfwWindow, int width, int height) -> bool = 0;
+
+        virtual auto init_ui() -> bool = 0;
+        virtual auto shutdown() -> void = 0;
+        virtual auto resize(int width, int height) -> void = 0;
+
+        virtual auto draw_frame(const glm::vec4& clear_color,
+                                const std::function<void()>& build_ui) -> void = 0;
+
+        virtual auto set_scene_mode(bool enabled) -> void = 0;
+        virtual auto is_scene_mode() const -> bool = 0;
+        virtual auto set_free_fly(bool enabled) -> void = 0;
+        virtual auto is_free_fly() const -> bool = 0;
+        virtual auto reset_camera() -> void = 0;
+
+        virtual auto set_hdri(const std::string& path) -> void = 0;
+        virtual auto current_hdri() const -> const std::string& = 0;
+        virtual auto scene_objects() -> std::vector<SceneObject>& = 0;
+        virtual auto set_selected_object(int index) -> void = 0;
+        virtual auto black_hole_params() -> BlackHoleParams& = 0;
+
+        virtual auto device_name() const -> const std::string& = 0;
+    };
+}