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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_MAC_IO_SURFACE_H_
#define UI_GFX_MAC_IO_SURFACE_H_
#include <IOSurface/IOSurface.h>
#include <mach/mach.h>
#include "base/mac/scoped_cftyperef.h"
#include "ui/gfx/buffer_types.h"
#include "ui/gfx/generic_shared_memory_id.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
namespace internal {
struct IOSurfaceMachPortTraits {
GFX_EXPORT static mach_port_t InvalidValue() { return MACH_PORT_NULL; }
GFX_EXPORT static mach_port_t Retain(mach_port_t);
GFX_EXPORT static void Release(mach_port_t);
};
struct ScopedInUseIOSurfaceTraits {
static IOSurfaceRef InvalidValue() { return nullptr; }
static IOSurfaceRef Retain(IOSurfaceRef io_surface) {
CFRetain(io_surface);
IOSurfaceIncrementUseCount(io_surface);
return io_surface;
}
static void Release(IOSurfaceRef io_surface) {
IOSurfaceDecrementUseCount(io_surface);
CFRelease(io_surface);
}
};
} // namespace internal
using IOSurfaceId = GenericSharedMemoryId;
// Helper function to create an IOSurface with a specified size and format.
GFX_EXPORT IOSurfaceRef CreateIOSurface(const Size& size, BufferFormat format);
// A scoper for handling Mach port names that are send rights for IOSurfaces.
// This scoper is both copyable and assignable, which will increase the kernel
// reference count of the right. On destruction, the reference count is
// decremented.
using ScopedRefCountedIOSurfaceMachPort =
base::ScopedTypeRef<mach_port_t, internal::IOSurfaceMachPortTraits>;
// A scoper for holding a reference to an IOSurface and also incrementing its
// in-use counter while the scoper exists.
using ScopedInUseIOSurface =
base::ScopedTypeRef<IOSurfaceRef, internal::ScopedInUseIOSurfaceTraits>;
} // namespace gfx
#endif // UI_GFX_MAC_IO_SURFACE_H_
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