1 files changed, 65 insertions, 0 deletions
diff --git a/src/rendering/framebuffer.h b/src/rendering/framebuffer.h
new file mode 100644
index 0000000..1d42d85
--- /dev/null
+++ b/src/rendering/framebuffer.h
@@ -0,0 +1,65 @@
+#pragma once
+
+#include "core/memory.h"
+#include "texture.h"
+
+namespace Donut
+{
+    enum class FramebufferTextureFormat
+    {
+        None = 0,
+        
+        RGBA8,
+        RED_INTEGER,
+        
+        DEPTH24STENCIL8,
+        
+        Depth = DEPTH24STENCIL8
+    };
+
+    struct FramebufferTextureSpecification
+    {
+        FramebufferTextureSpecification() = default;
+        FramebufferTextureSpecification(FramebufferTextureFormat format)
+            : texture_format(format) {}
+
+        FramebufferTextureFormat texture_format = FramebufferTextureFormat::None;
+    };
+
+    struct FramebufferAttachmentSpecification
+    {
+        FramebufferAttachmentSpecification() = default;
+        FramebufferAttachmentSpecification(std::initializer_list<FramebufferTextureSpecification> attachments)
+            : attachments(attachments) {}
+
+        std::vector<FramebufferTextureSpecification> attachments;
+    };
+
+    struct FramebufferSpecification
+    {
+        uint32_t Width = 0, Height = 0;
+        FramebufferAttachmentSpecification attachments;
+        uint32_t Samples = 1;
+
+        bool SwapChainTarget = false;
+    };
+
+    class Framebuffer
+    {
+    public:
+        virtual ~Framebuffer() = default;
+
+        virtual void bind()   = 0;
+        virtual void unbind() = 0;
+
+        virtual void resize(uint32_t width, uint32_t height)           = 0;
+        virtual int  read_pixel(uint32_t attachment_index, int x, int y) = 0;
+
+        virtual void clear_attachment(uint32_t attachment_index, int value)       = 0;
+        virtual uint32_t get_color_attachment_renderer_id(uint32_t index = 0) const = 0;
+
+        virtual const FramebufferSpecification& get_specification() const = 0;
+
+        static Ref<Framebuffer> create(const FramebufferSpecification& spec);
+    };
+};