[Feat] (MG_State/FramebufferState): Implement FramebufferAttachment, FramebufferObject and FramebufferState.

2026-09-08 20:28:32 +09:00 · 2025-10-02 21:27:33 +08:00
parent 776e1d99cf
commit d6b54f8e30
7 changed files with 353 additions and 0 deletions
@@ -0,0 +1,105 @@
+#pragma once
+#include "MG_Util/Types.h"
+#include <Includes.h>
+#include <MG_State/GLState/TextureState/TextureObject.h>
+
+namespace MobileGL {
+    enum class FramebufferTarget {
+        Draw,
+        Read,
+        FramebufferTargetCount,
+        Unknown = -1
+    };
+
+    enum class FramebufferAttachmentType {
+        Color0,
+        Color1,
+        Color2,
+        Color3,
+        Color4,
+        Color5,
+        Color6,
+        Color7,
+        Color8,
+        Color9,
+        Color10,
+        Color11,
+        Color12,
+        Color13,
+        Color14,
+        Color15,
+        Color16,
+        Color17,
+        Color18,
+        Color19,
+        Color20,
+        Color21,
+        Color22,
+        Color23,
+        Color24,
+        Color25,
+        Color26,
+        Color27,
+        Color28,
+        Color29,
+        Color30,
+        Color31,
+        Depth,
+        Stencil,
+        DepthStencil,
+        FramebufferAttachmentTypeCount,
+        Unknown = -1
+    };
+
+    namespace MG_State {
+        namespace GLState {
+            class RenderbufferObjectStub {}; // TODO
+
+            class FramebufferAttachment {
+            public:
+                // TODO: add Renderbuffer when it is implemented
+                explicit FramebufferAttachment(SharedPtr<MG_State::GLState::ITextureObject> texture, Int level = 0);
+                explicit FramebufferAttachment(SharedPtr<RenderbufferObjectStub> renderbuffer);
+                explicit FramebufferAttachment(std::nullptr_t);
+
+                Bool IsTexture() const;
+                Bool IsRenderbuffer() const;
+                Bool IsEmpty();
+                SharedPtr<MG_State::GLState::ITextureObject> GetTexture() const;
+                SharedPtr<RenderbufferObjectStub> GetRenderbuffer() const;
+                Int GetTextureLevel() const;
+                Bool IsComplete() const;
+                IntVec3 GetSize() const;
+
+            private:
+                SharedPtr<MG_State::GLState::ITextureObject> m_texture;
+                SharedPtr<RenderbufferObjectStub> m_renderbuffer;
+                Int m_textureLevel = 0;
+            };
+
+            class FramebufferObject {
+            public:
+                using TargetEnum = FramebufferTarget;
+
+                FramebufferObject();
+
+                void AttachTexture(FramebufferAttachmentType type, SharedPtr<ITextureObject> texture, int level = 0);
+                void AttachRenderbuffer(FramebufferAttachmentType type,
+                                        std::shared_ptr<RenderbufferObjectStub> renderbuffer);
+                void Detach(FramebufferAttachmentType type);
+                const FramebufferAttachment& GetAttachment(FramebufferAttachmentType type) const;
+                Bool CheckCompleteness() const;
+                void SetDrawBuffers(const std::vector<FramebufferAttachmentType>& buffers);
+                const Vector<FramebufferAttachmentType>& GetDrawBuffers() const;
+
+            private:
+                Array<FramebufferAttachment,
+                      static_cast<SizeT>(FramebufferAttachmentType::FramebufferAttachmentTypeCount)>
+                    m_attachments;
+                Bool m_drawBuffersDirty = true;
+                Vector<FramebufferAttachmentType> m_drawBuffers;
+            };
+
+        } // namespace GLState
+    } // namespace MG_State
+} // namespace MobileGL