The Tor Browser: gfx/2d/SourceSurfaceD2D.cpp@97036ab72558 (annotated)

gfx/2d/SourceSurfaceD2D.cpp@97036ab72558 (annotated)

gfx/2d/SourceSurfaceD2D.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- 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 "SourceSurfaceD2D.h"
 #include "DrawTargetD2D.h"
 #include "Logging.h"
 #include "Tools.h"
 namespace mozilla {
 namespace gfx {
 SourceSurfaceD2D::SourceSurfaceD2D()
 {
 }
 SourceSurfaceD2D::~SourceSurfaceD2D()
 {
   if (mBitmap) {
     DrawTargetD2D::mVRAMUsageSS -= GetByteSize();
   }
 }
 IntSize
 SourceSurfaceD2D::GetSize() const
 {
   return mSize;
 }
 SurfaceFormat
 SourceSurfaceD2D::GetFormat() const
 {
   return mFormat;
 }
 bool
 SourceSurfaceD2D::IsValid() const
 {
   return mDevice == Factory::GetDirect3D10Device();
 }
 TemporaryRef<DataSourceSurface>
 SourceSurfaceD2D::GetDataSurface()
 {
   RefPtr<DataSourceSurfaceD2D> result = new DataSourceSurfaceD2D(this);
   if (result->IsValid()) {
     return result;
   }
   return nullptr;
 }
 bool
 SourceSurfaceD2D::InitFromData(unsigned char *aData,
                                const IntSize &aSize,
                                int32_t aStride,
                                SurfaceFormat aFormat,
                                ID2D1RenderTarget *aRT)
 {
   HRESULT hr;
   mFormat = aFormat;
   mSize = aSize;
   if ((uint32_t)aSize.width > aRT->GetMaximumBitmapSize() ||
       (uint32_t)aSize.height > aRT->GetMaximumBitmapSize()) {
     gfxDebug() << "Bitmap does not fit in texture.";
     return false;
   }
   D2D1_BITMAP_PROPERTIES props = D2D1::BitmapProperties(D2DPixelFormat(aFormat));
   hr = aRT->CreateBitmap(D2DIntSize(aSize), aData, aStride, props, byRef(mBitmap));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create D2D Bitmap for data. Code: " << hr;
     return false;
   }
   DrawTargetD2D::mVRAMUsageSS += GetByteSize();
   mDevice = Factory::GetDirect3D10Device();
   return true;
 }
 bool
 SourceSurfaceD2D::InitFromTexture(ID3D10Texture2D *aTexture,
                                   SurfaceFormat aFormat,
                                   ID2D1RenderTarget *aRT)
 {
   HRESULT hr;
   RefPtr<IDXGISurface> surf;
   hr = aTexture->QueryInterface((IDXGISurface**)&surf);
   if (FAILED(hr)) {
     gfxWarning() << "Failed to QI texture to surface. Code: " << hr;
     return false;
   }
   D3D10_TEXTURE2D_DESC desc;
   aTexture->GetDesc(&desc);
   mSize = IntSize(desc.Width, desc.Height);
   mFormat = aFormat;
   D2D1_BITMAP_PROPERTIES props = D2D1::BitmapProperties(D2DPixelFormat(aFormat));
   hr = aRT->CreateSharedBitmap(IID_IDXGISurface, surf, &props, byRef(mBitmap));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create SharedBitmap. Code: " << hr;
     return false;
   }
   aTexture->GetDevice(byRef(mDevice));
   DrawTargetD2D::mVRAMUsageSS += GetByteSize();
   return true;
 }
 uint32_t
 SourceSurfaceD2D::GetByteSize() const
 {
   return mSize.width * mSize.height * BytesPerPixel(mFormat);
 }
 DataSourceSurfaceD2D::DataSourceSurfaceD2D(SourceSurfaceD2D* aSourceSurface)
   : mTexture(nullptr)
   , mFormat(aSourceSurface->mFormat)
   , mSize(aSourceSurface->mSize)
   , mMapped(false)
 {
   // We allocate ourselves a regular D3D surface (sourceTexture) and paint the
   // D2D bitmap into it via a DXGI render target. Then we need to copy
   // sourceTexture into a staging texture (mTexture), which we will lazily map
   // to get the data.
   CD3D10_TEXTURE2D_DESC desc(DXGIFormat(mFormat), mSize.width, mSize.height);
   desc.MipLevels = 1;
   desc.Usage = D3D10_USAGE_DEFAULT;
   desc.BindFlags = D3D10_BIND_RENDER_TARGET | D3D10_BIND_SHADER_RESOURCE;
   RefPtr<ID3D10Texture2D> sourceTexture;
   HRESULT hr = aSourceSurface->mDevice->CreateTexture2D(&desc, nullptr,
                                                         byRef(sourceTexture));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create texture. Code: " << hr;
     return;
   }
   RefPtr<IDXGISurface> dxgiSurface;
   hr = sourceTexture->QueryInterface((IDXGISurface**)byRef(dxgiSurface));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create DXGI surface. Code: " << hr;
     return;
   }
   D2D1_RENDER_TARGET_PROPERTIES rtProps = D2D1::RenderTargetProperties(
             D2D1_RENDER_TARGET_TYPE_DEFAULT,
             D2D1::PixelFormat(DXGI_FORMAT_UNKNOWN, D2D1_ALPHA_MODE_PREMULTIPLIED));
   RefPtr<ID2D1RenderTarget> renderTarget;
   hr = DrawTargetD2D::factory()->CreateDxgiSurfaceRenderTarget(dxgiSurface,
                                                                &rtProps,
                                                                byRef(renderTarget));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create render target. Code: " << hr;
     return;
   }
   renderTarget->BeginDraw();
   renderTarget->Clear(D2D1::ColorF(0, 0.0f));
   renderTarget->DrawBitmap(aSourceSurface->mBitmap,
                            D2D1::RectF(0, 0,
                                        Float(mSize.width),
                                        Float(mSize.height)));
   hr = renderTarget->EndDraw();
   if (FAILED(hr)) {
     gfxWarning() << "Failed to draw bitmap. Code: " << hr;
     return;
   }
   desc.CPUAccessFlags = D3D10_CPU_ACCESS_READ | D3D10_CPU_ACCESS_WRITE;
   desc.Usage = D3D10_USAGE_STAGING;
   desc.BindFlags = 0;
   hr = aSourceSurface->mDevice->CreateTexture2D(&desc, nullptr, byRef(mTexture));
   if (FAILED(hr)) {
     gfxWarning() << "Failed to create staging texture. Code: " << hr;
     mTexture = nullptr;
     return;
   }
   aSourceSurface->mDevice->CopyResource(mTexture, sourceTexture);
 }
 DataSourceSurfaceD2D::~DataSourceSurfaceD2D()
 {
   if (mMapped) {
     mTexture->Unmap(0);
   }
 }
 unsigned char*
 DataSourceSurfaceD2D::GetData()
 {
   EnsureMappedTexture();
   if (!mMapped) {
     return nullptr;
   }
   return reinterpret_cast<unsigned char*>(mData.pData);
 }
 int32_t
 DataSourceSurfaceD2D::Stride()
 {
   EnsureMappedTexture();
   if (!mMapped) {
     return 0;
   }
   return mData.RowPitch;
 }
 IntSize
 DataSourceSurfaceD2D::GetSize() const
 {
   return mSize;
 }
 SurfaceFormat
 DataSourceSurfaceD2D::GetFormat() const
 {
   return mFormat;
 }
 bool
 DataSourceSurfaceD2D::Map(MapType aMapType, MappedSurface *aMappedSurface)
 {
   // DataSourceSurfaces used with the new Map API should not be used with GetData!!
   MOZ_ASSERT(!mMapped);
   MOZ_ASSERT(!mIsMapped);
   if (!mTexture) {
     return false;
   }
   D3D10_MAP mapType;
   if (aMapType == MapType::READ) {
     mapType = D3D10_MAP_READ;
   } else if (aMapType == MapType::WRITE) {
     mapType = D3D10_MAP_WRITE;
   } else {
     mapType = D3D10_MAP_READ_WRITE;
   }
   D3D10_MAPPED_TEXTURE2D map;
   HRESULT hr = mTexture->Map(0, mapType, 0, &map);
   if (FAILED(hr)) {
     gfxWarning() << "Texture map failed with code: " << hr;
     return false;
   }
   aMappedSurface->mData = (uint8_t*)map.pData;
   aMappedSurface->mStride = map.RowPitch;
   mIsMapped = true;
   return true;
 }
 void
 DataSourceSurfaceD2D::Unmap()
 {
   MOZ_ASSERT(mIsMapped);
   mIsMapped = false;
   mTexture->Unmap(0);
 }
 void
 DataSourceSurfaceD2D::EnsureMappedTexture()
 {
   // Do not use GetData() after having used Map!
   MOZ_ASSERT(!mIsMapped);
   if (mMapped ||
       !mTexture) {
     return;
   }
   HRESULT hr = mTexture->Map(0, D3D10_MAP_READ, 0, &mData);
   if (FAILED(hr)) {
     gfxWarning() << "Failed to map texture. Code: " << hr;
     mTexture = nullptr;
   } else {
     mMapped = true;
   }
 }
 }
 }

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gfx/2d/SourceSurfaceD2D.cpp@97036ab72558 (annotated)

gfx/2d/SourceSurfaceD2D.cpp