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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 "build/build_config.h"
#include "ui/gfx/gfx_export.h"
#if defined(OS_LINUX)
#include "base/file_descriptor_posix.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 {
// 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;
NativePixmapPlane();
NativePixmapPlane(int stride,
int offset,
uint64_t size,
uint64_t modifier = kNoModifier);
NativePixmapPlane(const NativePixmapPlane& other);
~NativePixmapPlane();
// The strides and offsets in bytes to be used when accessing the buffers via
// a memory mapping. One per plane per entry.
int stride;
int offset;
// Size in bytes of the plane.
// This is necessary to map the buffers.
uint64_t size;
// 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;
};
struct GFX_EXPORT NativePixmapHandle {
NativePixmapHandle();
NativePixmapHandle(const NativePixmapHandle& other);
~NativePixmapHandle();
#if defined(OS_LINUX)
// File descriptors for the underlying memory objects (usually dmabufs).
std::vector<base::FileDescriptor> fds;
#endif
std::vector<NativePixmapPlane> planes;
};
#if defined(OS_LINUX)
// 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);
#endif
} // namespace gfx
#endif // UI_GFX_NATIVE_PIXMAP_HANDLE_H_
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