chromium/gpu/ipc/common/client_gmb_interface.mojom

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module gpu.mojom;

import "ui/gfx/mojom/buffer_types.mojom";
import "ui/gfx/geometry/mojom/geometry.mojom";
import "gpu/ipc/common/surface_handle.mojom";
import "mojo/public/mojom/base/shared_memory.mojom";

// Interface used by clients in the renderer process to create
// GpuMemoryBuffers. This interface is only enabled and used when the feature
// UseClientGmbInterface is enabled.
interface ClientGmbInterface {

  // Create a new GMB and return the GMB handle.
  CreateGpuMemoryBuffer(gfx.mojom.GpuMemoryBufferId id,
                        gfx.mojom.Size size,
                        gfx.mojom.BufferFormat format,
                        gfx.mojom.BufferUsage usage,
                        gpu.mojom.SurfaceHandle surface_handle)
      => (gfx.mojom.GpuMemoryBufferHandle buffer_handle);

  // Destroys the GMB.
  DestroyGpuMemoryBuffer(gfx.mojom.GpuMemoryBufferId id);

  // Copies GMB pixel data to |shared_memory|.
  // Returns |true| if the copy has succeeded.
  CopyGpuMemoryBuffer(gfx.mojom.GpuMemoryBufferHandle buffer_handle,
                     mojo_base.mojom.UnsafeSharedMemoryRegion shared_memory)
                     => (bool success);

};