Make a SharedGraphics directory for classes shared between Kernel and LibGUI.

SharedGraphics/GraphicsBitmap.h

@@ -0,0 +1,58 @@
+#pragma once
+
+#include "Color.h"
+#include "Size.h"
+#include <AK/Retainable.h>
+#include <AK/RetainPtr.h>
+
+#ifdef KERNEL
+#include "Process.h"
+#endif
+
+class GraphicsBitmap : public Retainable<GraphicsBitmap> {
+public:
+#ifdef KERNEL
+    static RetainPtr<GraphicsBitmap> create(Process&, const Size&);
+#endif
+    static RetainPtr<GraphicsBitmap> create_wrapper(const Size&, RGBA32*);
+    ~GraphicsBitmap();
+
+    RGBA32* scanline(int y);
+    const RGBA32* scanline(int y) const;
+
+    Size size() const { return m_size; }
+    int width() const { return m_size.width(); }
+    int height() const { return m_size.height(); }
+    size_t pitch() const { return m_pitch; }
+
+#ifdef KERNEL
+    Region* client_region() { return m_client_region; }
+    Region* server_region() { return m_server_region; }
+#endif
+
+private:
+#ifdef KERNEL
+    GraphicsBitmap(Process&, const Size&);
+#endif
+    GraphicsBitmap(const Size&, RGBA32*);
+
+    Size m_size;
+    RGBA32* m_data { nullptr };
+    size_t m_pitch { 0 };
+
+#ifdef KERNEL
+    Process* m_client_process { nullptr };
+    Region* m_client_region { nullptr };
+    Region* m_server_region { nullptr };
+#endif
+};
+
+inline RGBA32* GraphicsBitmap::scanline(int y)
+{
+    return reinterpret_cast<RGBA32*>((((byte*)m_data) + (y * m_pitch)));
+}
+
+inline const RGBA32* GraphicsBitmap::scanline(int y) const
+{
+    return reinterpret_cast<const RGBA32*>((((const byte*)m_data) + (y * m_pitch)));
+}