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Kernel: Add a simple shared memory API for two processes only.

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And use this to implement shared bitmaps between WindowServer and clients.
This commit is contained in:
Andreas Kling 2019-02-16 12:13:43 +01:00
parent 4db78dabd3
commit 4ea28bf0a5
13 changed files with 240 additions and 48 deletions
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15
SharedGraphics/GraphicsBitmap.h
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@ -7,18 +7,16 @@
#include <AK/RetainPtr.h>
#include <AK/AKString.h>
#ifdef KERNEL
#include "Process.h"
#endif
class Region;
class GraphicsBitmap : public Retainable<GraphicsBitmap> {
public:
#ifdef KERNEL
static RetainPtr<GraphicsBitmap> create(Process&, const Size&);
static RetainPtr<GraphicsBitmap> create_kernel_only(const Size&);
#endif
static RetainPtr<GraphicsBitmap> create_wrapper(const Size&, RGBA32*);
static RetainPtr<GraphicsBitmap> load_from_file(const String& path, const Size&);
static RetainPtr<GraphicsBitmap> create_with_shared_buffer(int shared_buffer_id, const Size&, RGBA32* buffer = nullptr);
~GraphicsBitmap();
RGBA32* scanline(int y);
@ -31,16 +29,17 @@ public:
size_t pitch() const { return m_pitch; }
#ifdef KERNEL
Region* client_region() { return m_client_region; }
Region* server_region() { return m_server_region; }
#endif
int shared_buffer_id() const { return m_shared_buffer_id; }
private:
#ifdef KERNEL
GraphicsBitmap(Process&, const Size&);
GraphicsBitmap(const Size&);
#endif
GraphicsBitmap(const Size&, RGBA32*);
GraphicsBitmap(int shared_buffer_id, const Size&, RGBA32*);
Size m_size;
RGBA32* m_data { nullptr };
@ -50,9 +49,9 @@ private:
bool m_mmaped { false };
#endif
int m_shared_buffer_id { -1 };
#ifdef KERNEL
WeakPtr<Process> m_client_process;
Region* m_client_region { nullptr };
Region* m_server_region { nullptr };
#endif
};