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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/native_pixmap_handle.h"
#include <utility>
#include "base/logging.h"
#include "build/build_config.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/geometry/size.h"
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include <drm_fourcc.h>
#include <unistd.h>
#include "base/posix/eintr_wrapper.h"
#endif
#if BUILDFLAG(IS_FUCHSIA)
#include <lib/zx/vmo.h>
#include "base/fuchsia/fuchsia_logging.h"
#endif
namespace gfx {
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
static_assert(NativePixmapHandle::kNoModifier == DRM_FORMAT_MOD_INVALID,
"gfx::NativePixmapHandle::kNoModifier should be an alias for"
"DRM_FORMAT_MOD_INVALID");
#endif
NativePixmapPlane::NativePixmapPlane() : stride(0), offset(0), size(0) {}
NativePixmapPlane::NativePixmapPlane(int stride,
int offset,
uint64_t size
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
,
base::ScopedFD fd
#elif BUILDFLAG(IS_FUCHSIA)
,
zx::vmo vmo
#endif
)
: stride(stride),
offset(offset),
size(size)
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
,
fd(std::move(fd))
#elif BUILDFLAG(IS_FUCHSIA)
,
vmo(std::move(vmo))
#endif
{
}
NativePixmapPlane::NativePixmapPlane(NativePixmapPlane&& other) = default;
NativePixmapPlane::~NativePixmapPlane() = default;
NativePixmapPlane& NativePixmapPlane::operator=(NativePixmapPlane&& other) =
default;
NativePixmapHandle::NativePixmapHandle() = default;
NativePixmapHandle::NativePixmapHandle(NativePixmapHandle&& other) = default;
NativePixmapHandle::~NativePixmapHandle() = default;
NativePixmapHandle& NativePixmapHandle::operator=(NativePixmapHandle&& other) =
default;
NativePixmapHandle CloneHandleForIPC(const NativePixmapHandle& handle) {
NativePixmapHandle clone;
for (auto& plane : handle.planes) {
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
DCHECK(plane.fd.is_valid());
// Combining the HANDLE_EINTR and ScopedFD's constructor causes the compiler
// to emit some very strange assembly that tends to cause FD ownership
// violations. see crbug.com/c/1287325.
int checked_dup = HANDLE_EINTR(dup(plane.fd.get()));
base::ScopedFD fd_dup(checked_dup);
if (!fd_dup.is_valid()) {
PLOG(ERROR) << "dup";
return NativePixmapHandle();
}
NativePixmapPlane cloned_plane;
cloned_plane.stride = plane.stride;
cloned_plane.offset = plane.offset;
cloned_plane.size = plane.size;
cloned_plane.fd = std::move(fd_dup);
clone.planes.push_back(std::move(cloned_plane));
#elif BUILDFLAG(IS_FUCHSIA)
zx::vmo vmo_dup;
// VMO may be set to NULL for pixmaps that cannot be mapped.
if (plane.vmo) {
zx_status_t status = plane.vmo.duplicate(ZX_RIGHT_SAME_RIGHTS, &vmo_dup);
if (status != ZX_OK) {
ZX_DLOG(ERROR, status) << "zx_handle_duplicate";
return NativePixmapHandle();
}
}
NativePixmapPlane cloned_plane;
cloned_plane.stride = plane.stride;
cloned_plane.offset = plane.offset;
cloned_plane.size = plane.size;
cloned_plane.vmo = std::move(vmo_dup);
clone.planes.push_back(std::move(cloned_plane));
#else
#error Unsupported OS
#endif
}
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
clone.modifier = handle.modifier;
clone.supports_zero_copy_webgpu_import =
handle.supports_zero_copy_webgpu_import;
#endif
#if BUILDFLAG(IS_FUCHSIA)
if (handle.buffer_collection_handle) {
zx_status_t status = handle.buffer_collection_handle.duplicate(
ZX_RIGHT_SAME_RIGHTS, &clone.buffer_collection_handle);
if (status != ZX_OK) {
ZX_DLOG(ERROR, status) << "zx_handle_duplicate";
return NativePixmapHandle();
}
}
clone.buffer_index = handle.buffer_index;
clone.ram_coherency = handle.ram_coherency;
#endif
return clone;
}
bool CanFitImageForSizeAndFormat(const gfx::NativePixmapHandle& handle,
const gfx::Size& size,
gfx::BufferFormat format,
bool assume_single_memory_object) {
size_t expected_planes = gfx::NumberOfPlanesForLinearBufferFormat(format);
if (expected_planes == 0 || handle.planes.size() != expected_planes)
return false;
size_t total_size = 0u;
if (assume_single_memory_object) {
if (!base::IsValueInRangeForNumericType<size_t>(
handle.planes.back().offset) ||
!base::IsValueInRangeForNumericType<size_t>(
handle.planes.back().size)) {
return false;
}
const base::CheckedNumeric<size_t> total_size_checked =
base::CheckAdd(base::checked_cast<size_t>(handle.planes.back().offset),
base::checked_cast<size_t>(handle.planes.back().size));
if (!total_size_checked.IsValid())
return false;
total_size = total_size_checked.ValueOrDie();
}
for (size_t i = 0; i < handle.planes.size(); ++i) {
const size_t plane_stride =
base::strict_cast<size_t>(handle.planes[i].stride);
size_t min_stride = 0;
if (!gfx::RowSizeForBufferFormatChecked(
base::checked_cast<size_t>(size.width()), format, i, &min_stride) ||
plane_stride < min_stride) {
return false;
}
const size_t subsample_factor = SubsamplingFactorForBufferFormat(format, i);
const base::CheckedNumeric<size_t> plane_height =
base::CheckDiv(base::CheckAdd(base::checked_cast<size_t>(size.height()),
base::CheckSub(subsample_factor, 1)),
subsample_factor);
const base::CheckedNumeric<size_t> min_size = plane_height * plane_stride;
if (!min_size.IsValid<uint64_t>() ||
handle.planes[i].size < min_size.ValueOrDie<uint64_t>()) {
return false;
}
// The stride must be a valid integer in order to be consistent with the
// GpuMemoryBuffer::stride()/gfx::ClientNativePixmap::GetStride() APIs.
// Also, refer to http://crbug.com/1093644#c1 for some comments on this
// check and others in this method.
if (!base::IsValueInRangeForNumericType<int>(plane_stride))
return false;
if (assume_single_memory_object) {
if (!base::IsValueInRangeForNumericType<size_t>(
handle.planes[i].offset) ||
!base::IsValueInRangeForNumericType<size_t>(handle.planes[i].size)) {
return false;
}
base::CheckedNumeric<size_t> end_pos =
base::CheckAdd(base::checked_cast<size_t>(handle.planes[i].offset),
base::checked_cast<size_t>(handle.planes[i].size));
if (!end_pos.IsValid() || end_pos.ValueOrDie() > total_size)
return false;
}
}
return true;
}
} // namespace gfx
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