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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_NATIVE_PIXMAP_HANDLE_H_
#define UI_GFX_NATIVE_PIXMAP_HANDLE_H_
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "base/optional.h"
#include "base/unguessable_token.h"
#include "build/build_config.h"
#include "ui/gfx/gfx_export.h"
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
#include "base/files/scoped_file.h"
#endif
#if defined(OS_FUCHSIA)
#include <lib/zx/vmo.h>
#endif
namespace gfx {
// NativePixmapPlane is used to carry the plane related information for GBM
// buffer. More fields can be added if they are plane specific.
struct GFX_EXPORT NativePixmapPlane {
NativePixmapPlane();
NativePixmapPlane(int stride,
int offset,
uint64_t size
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
,
base::ScopedFD fd
#elif defined(OS_FUCHSIA)
,
zx::vmo vmo
#endif
);
NativePixmapPlane(NativePixmapPlane&& other);
~NativePixmapPlane();
NativePixmapPlane& operator=(NativePixmapPlane&& other);
// The strides and offsets in bytes to be used when accessing the buffers via
// a memory mapping. One per plane per entry.
uint32_t stride;
uint64_t offset;
// Size in bytes of the plane.
// This is necessary to map the buffers.
uint64_t size;
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
// File descriptor for the underlying memory object (usually dmabuf).
base::ScopedFD fd;
#elif defined(OS_FUCHSIA)
zx::vmo vmo;
#endif
};
#if defined(OS_FUCHSIA)
// Buffer collection ID is used to identify sysmem buffer collections across
// processes.
using SysmemBufferCollectionId = base::UnguessableToken;
#endif
struct GFX_EXPORT NativePixmapHandle {
// This is the same value as DRM_FORMAT_MOD_INVALID, which is not a valid
// modifier. We use this to indicate that layout information
// (tiling/compression) if any will be communicated out of band.
static constexpr uint64_t kNoModifier = 0x00ffffffffffffffULL;
NativePixmapHandle();
NativePixmapHandle(NativePixmapHandle&& other);
~NativePixmapHandle();
NativePixmapHandle& operator=(NativePixmapHandle&& other);
std::vector<NativePixmapPlane> planes;
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
// The modifier is retrieved from GBM library and passed to EGL driver.
// Generally it's platform specific, and we don't need to modify it in
// Chromium code. Also one per plane per entry.
uint64_t modifier = kNoModifier;
#endif
#if defined(OS_FUCHSIA)
base::Optional<SysmemBufferCollectionId> buffer_collection_id;
uint32_t buffer_index = 0;
// Set to true for sysmem buffers which are initialized with RAM coherency
// domain. This means that clients that write to the buffers must flush CPU
// cache.
bool ram_coherency = false;
#endif
};
// Returns an instance of |handle| which can be sent over IPC. This duplicates
// the file-handles, so that the IPC code take ownership of them, without
// invalidating |handle|.
GFX_EXPORT NativePixmapHandle
CloneHandleForIPC(const NativePixmapHandle& handle);
} // namespace gfx
#endif // UI_GFX_NATIVE_PIXMAP_HANDLE_H_
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