SWRasterizer: Move framebuffer operation functions to their own file

src/video_core/swrasterizer/framebuffer.h

@@ -0,0 +1,23 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "common/vector_math.h"
+#include "video_core/regs_framebuffer.h"
+
+namespace Pica {
+namespace Rasterizer {
+
+void DrawPixel(int x, int y, const Math::Vec4<u8>& color);
+const Math::Vec4<u8> GetPixel(int x, int y);
+u32 GetDepth(int x, int y);
+u8 GetStencil(int x, int y);
+void SetDepth(int x, int y, u32 value);
+void SetStencil(int x, int y, u8 value);
+u8 PerformStencilAction(FramebufferRegs::StencilAction action, u8 old_stencil, u8 ref);
+
+} // namespace Rasterizer
+} // namespace Pica