From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 gfx/layers/D3D11ShareHandleImage.cpp | 163 +++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 gfx/layers/D3D11ShareHandleImage.cpp

(limited to 'gfx/layers/D3D11ShareHandleImage.cpp')

diff --git a/gfx/layers/D3D11ShareHandleImage.cpp b/gfx/layers/D3D11ShareHandleImage.cpp
new file mode 100644
index 000000000..e00a5e3b7
--- /dev/null
+++ b/gfx/layers/D3D11ShareHandleImage.cpp
@@ -0,0 +1,163 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WMF.h"
+#include "D3D11ShareHandleImage.h"
+#include "gfxImageSurface.h"
+#include "gfxWindowsPlatform.h"
+#include "mozilla/layers/TextureClient.h"
+#include "mozilla/layers/TextureD3D11.h"
+#include "mozilla/layers/CompositableClient.h"
+#include "mozilla/layers/CompositableForwarder.h"
+#include "d3d11.h"
+
+namespace mozilla {
+namespace layers {
+
+D3D11ShareHandleImage::D3D11ShareHandleImage(const gfx::IntSize& aSize,
+                                             const gfx::IntRect& aRect)
+ : Image(nullptr, ImageFormat::D3D11_SHARE_HANDLE_TEXTURE),
+   mSize(aSize),
+   mPictureRect(aRect)
+{
+}
+
+bool
+D3D11ShareHandleImage::AllocateTexture(D3D11RecycleAllocator* aAllocator, ID3D11Device* aDevice)
+{
+  if (aAllocator) {
+    mTextureClient = aAllocator->CreateOrRecycleClient(gfx::SurfaceFormat::B8G8R8A8, mSize);
+    if (mTextureClient) {
+      mTexture = static_cast<D3D11TextureData*>(mTextureClient->GetInternalData())->GetD3D11Texture();
+      return true;
+    }
+    return false;
+  } else {
+    MOZ_ASSERT(aDevice);
+    CD3D11_TEXTURE2D_DESC newDesc(DXGI_FORMAT_B8G8R8A8_UNORM,
+                                  mSize.width, mSize.height, 1, 1,
+                                  D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE);
+    newDesc.MiscFlags = D3D11_RESOURCE_MISC_SHARED;
+
+    HRESULT hr = aDevice->CreateTexture2D(&newDesc, nullptr, getter_AddRefs(mTexture));
+    return SUCCEEDED(hr);
+  }
+}
+
+gfx::IntSize
+D3D11ShareHandleImage::GetSize()
+{
+  return mSize;
+}
+
+TextureClient*
+D3D11ShareHandleImage::GetTextureClient(KnowsCompositor* aForwarder)
+{
+  return mTextureClient;
+}
+
+already_AddRefed<gfx::SourceSurface>
+D3D11ShareHandleImage::GetAsSourceSurface()
+{
+  RefPtr<ID3D11Texture2D> texture = GetTexture();
+  if (!texture) {
+    NS_WARNING("Cannot readback from shared texture because no texture is available.");
+    return nullptr;
+  }
+
+  RefPtr<ID3D11Device> device;
+  texture->GetDevice(getter_AddRefs(device));
+
+  D3D11_TEXTURE2D_DESC desc;
+  texture->GetDesc(&desc);
+
+  CD3D11_TEXTURE2D_DESC softDesc(desc.Format, desc.Width, desc.Height);
+  softDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
+  softDesc.BindFlags = 0;
+  softDesc.MiscFlags = 0;
+  softDesc.MipLevels = 1;
+  softDesc.Usage = D3D11_USAGE_STAGING;
+
+  RefPtr<ID3D11Texture2D> softTexture;
+  HRESULT hr = device->CreateTexture2D(&softDesc,
+                                       NULL,
+                                       static_cast<ID3D11Texture2D**>(getter_AddRefs(softTexture)));
+
+  if (FAILED(hr)) {
+    NS_WARNING("Failed to create 2D staging texture.");
+    return nullptr;
+  }
+
+  RefPtr<ID3D11DeviceContext> context;
+  device->GetImmediateContext(getter_AddRefs(context));
+  if (!context) {
+    return nullptr;
+  }
+
+  context->CopyResource(softTexture, texture);
+
+  RefPtr<gfx::DataSourceSurface> surface =
+    gfx::Factory::CreateDataSourceSurface(mSize, gfx::SurfaceFormat::B8G8R8A8);
+  if (NS_WARN_IF(!surface)) {
+    return nullptr;
+  }
+
+  gfx::DataSourceSurface::MappedSurface mappedSurface;
+  if (!surface->Map(gfx::DataSourceSurface::WRITE, &mappedSurface)) {
+    return nullptr;
+  }
+
+  D3D11_MAPPED_SUBRESOURCE map;
+  hr = context->Map(softTexture, 0, D3D11_MAP_READ, 0, &map);
+  if (!SUCCEEDED(hr)) {
+    surface->Unmap();
+    return nullptr;
+  }
+
+  for (int y = 0; y < mSize.height; y++) {
+    memcpy(mappedSurface.mData + mappedSurface.mStride * y,
+           (unsigned char*)(map.pData) + map.RowPitch * y,
+           mSize.width * 4);
+  }
+
+  context->Unmap(softTexture, 0);
+  surface->Unmap();
+
+  return surface.forget();
+}
+
+ID3D11Texture2D*
+D3D11ShareHandleImage::GetTexture() const {
+  return mTexture;
+}
+
+already_AddRefed<TextureClient>
+D3D11RecycleAllocator::Allocate(gfx::SurfaceFormat aFormat,
+                                gfx::IntSize aSize,
+                                BackendSelector aSelector,
+                                TextureFlags aTextureFlags,
+                                TextureAllocationFlags aAllocFlags)
+{
+  return CreateD3D11TextureClientWithDevice(aSize, aFormat,
+                                            aTextureFlags, aAllocFlags,
+                                            mDevice, mSurfaceAllocator->GetTextureForwarder());
+}
+
+already_AddRefed<TextureClient>
+D3D11RecycleAllocator::CreateOrRecycleClient(gfx::SurfaceFormat aFormat,
+                                             const gfx::IntSize& aSize)
+{
+  RefPtr<TextureClient> textureClient =
+    CreateOrRecycle(aFormat,
+                    aSize,
+                    BackendSelector::Content,
+                    layers::TextureFlags::DEFAULT,
+                    TextureAllocationFlags::ALLOC_MANUAL_SYNCHRONIZATION);
+  return textureClient.forget();
+}
+
+
+} // namespace layers
+} // namespace mozilla
-- 
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