exo: Add support for importing YVU_420 buffers.

components/exo/display.cc

 // 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.
 
 #include "components/exo/display.h"
 
 #include <iterator>
 #include <utility>
 
 #include "ash/common/shell_window_ids.h"
@@ skipping 42 matching lines @@
   TRACE_EVENT1("exo", "Display::CreateSharedMemory", "size", size);
 
   if (!base::SharedMemory::IsHandleValid(handle))
     return nullptr;
 
   return base::WrapUnique(new SharedMemory(handle));
 }
 
 #if defined(USE_OZONE)
 std::unique_ptr<Buffer> Display::CreateLinuxDMABufBuffer(
-    base::ScopedFD fd,
     const gfx::Size& size,
     gfx::BufferFormat format,
-    int stride) {
+    const std::vector<int>& strides,
+    const std::vector<int>& offsets,
+    std::vector<base::ScopedFD>&& fds) {
   TRACE_EVENT1("exo", "Display::CreateLinuxDMABufBuffer", "size",
                size.ToString());
 
   gfx::GpuMemoryBufferHandle handle;
   handle.type = gfx::OZONE_NATIVE_PIXMAP;
-  handle.native_pixmap_handle.fds.emplace_back(
-      base::FileDescriptor(std::move(fd)));
-  handle.native_pixmap_handle.strides_and_offsets.emplace_back(stride, 0);
+  for (auto& fd : fds)
+    handle.native_pixmap_handle.fds.emplace_back(std::move(fd));
+
+  DCHECK_EQ(strides.size(), offsets.size());
+  for (size_t plane = 0; plane < strides.size(); ++plane) {
+    handle.native_pixmap_handle.strides_and_offsets.emplace_back(
+        strides[plane], offsets[plane]);
+  }
 
   std::unique_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer =
       aura::Env::GetInstance()
           ->context_factory()
           ->GetGpuMemoryBufferManager()
           ->CreateGpuMemoryBufferFromHandle(handle, size, format);
   if (!gpu_memory_buffer) {
     LOG(ERROR) << "Failed to create GpuMemoryBuffer from handle";
     return nullptr;
   }
@@ skipping 87 matching lines @@
 
   if (surface->HasSurfaceDelegate()) {
     DLOG(ERROR) << "Surface has already been assigned a role";
     return nullptr;
   }
 
   return base::WrapUnique(new SubSurface(surface, parent));
 }
 
 }  // namespace exo