dom/webgpu/ExternalTexture.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef ExternalTexture_H_
   7 #define ExternalTexture_H_
   8
   9 #include "mozilla/gfx/Point.h"
  10 #include "mozilla/layers/LayersSurfaces.h"
  11 #include "mozilla/webgpu/ffi/wgpu.h"
  12
  13 namespace mozilla {
  14
  15 namespace ipc {
  16 class Shmem;
  17 }
  18
  19 namespace webgpu {
  20
  21 // A texture that can be used by the WebGPU implementation but is created and
  22 // owned by Gecko
  23 class ExternalTexture {
  24  public:
  25   static UniquePtr<ExternalTexture> Create(
  26       const uint32_t aWidth, const uint32_t aHeight,
  27       const struct ffi::WGPUTextureFormat aFormat,
  28       const ffi::WGPUTextureUsages aUsage);
  29
  30   ExternalTexture(const uint32_t aWidth, const uint32_t aHeight,
  31                   const struct ffi::WGPUTextureFormat aFormat,
  32                   const ffi::WGPUTextureUsages aUsage);
  33   virtual ~ExternalTexture();
  34
  35   virtual void* GetExternalTextureHandle() { return nullptr; }
  36
  37   virtual Maybe<layers::SurfaceDescriptor> ToSurfaceDescriptor(
  38       Maybe<gfx::FenceInfo>& aFenceInfo) = 0;
  39
  40   virtual void GetSnapshot(const ipc::Shmem& aDestShmem,
  41                            const gfx::IntSize& aSize) {}
  42
  43   gfx::IntSize GetSize() { return gfx::IntSize(mWidth, mHeight); }
  44
  45   void SetSubmissionIndex(uint64_t aSubmissionIndex);
  46   uint64_t GetSubmissionIndex() const { return mSubmissionIndex; }
  47
  48   const uint32_t mWidth;
  49   const uint32_t mHeight;
  50   const struct ffi::WGPUTextureFormat mFormat;
  51   const ffi::WGPUTextureUsages mUsage;
  52
  53  protected:
  54   uint64_t mSubmissionIndex = 0;
  55 };
  56
  57 }  // namespace webgpu
  58 }  // namespace mozilla
  59
  60 #endif  // GPU_ExternalTexture_H_