The Tor Browser: gfx/layers/ipc/ShadowLayerUtilsGralloc.cpp@b8a032363ba2 (annotated)

gfx/layers/ipc/ShadowLayerUtilsGralloc.cpp@b8a032363ba2 (annotated)

gfx/layers/ipc/ShadowLayerUtilsGralloc.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * vim: sw=2 ts=8 et :
  */
 /* 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 "mozilla/DebugOnly.h"
 #include "mozilla/gfx/Point.h"
 #include "mozilla/layers/PGrallocBufferChild.h"
 #include "mozilla/layers/PGrallocBufferParent.h"
 #include "mozilla/layers/LayerTransactionChild.h"
 #include "mozilla/layers/ShadowLayers.h"
 #include "mozilla/layers/LayerManagerComposite.h"
 #include "mozilla/layers/CompositorTypes.h"
 #include "mozilla/layers/TextureHost.h"
 #include "mozilla/unused.h"
 #include "nsXULAppAPI.h"
 #include "ShadowLayerUtilsGralloc.h"
 #include "nsIMemoryReporter.h"
 #include "gfxPlatform.h"
 #include "gfx2DGlue.h"
 #include "GLContext.h"
 #include "GeckoProfiler.h"
 #include "cutils/properties.h"
 #include "MainThreadUtils.h"
 using namespace android;
 using namespace base;
 using namespace mozilla::layers;
 using namespace mozilla::gl;
 namespace IPC {
 void
 ParamTraits<MagicGrallocBufferHandle>::Write(Message* aMsg,
                                              const paramType& aParam)
 {
 #if ANDROID_VERSION >= 19
   sp<GraphicBuffer> flattenable = aParam.mGraphicBuffer;
 #else
   Flattenable *flattenable = aParam.mGraphicBuffer.get();
 #endif
   size_t nbytes = flattenable->getFlattenedSize();
   size_t nfds = flattenable->getFdCount();
   char data[nbytes];
   int fds[nfds];
 #if ANDROID_VERSION >= 19
   // Make a copy of "data" and "fds" for flatten() to avoid casting problem
   void *pdata = (void *)data;
   int *pfds = fds;
   flattenable->flatten(pdata, nbytes, pfds, nfds);
   // In Kitkat, flatten() will change the value of nbytes and nfds, which dues
   // to multiple parcelable object consumption. The actual size and fd count
   // which returned by getFlattenedSize() and getFdCount() are not changed.
   // So we change nbytes and nfds back by call corresponding calls.
   nbytes = flattenable->getFlattenedSize();
   nfds = flattenable->getFdCount();
 #else
   flattenable->flatten(data, nbytes, fds, nfds);
 #endif
   aMsg->WriteSize(nbytes);
   aMsg->WriteSize(nfds);
   aMsg->WriteBytes(data, nbytes);
   for (size_t n = 0; n < nfds; ++n) {
     // These buffers can't die in transit because they're created
     // synchonously and the parent-side buffer can only be dropped if
     // there's a crash.
     aMsg->WriteFileDescriptor(FileDescriptor(fds[n], false));
   }
 }
 bool
 ParamTraits<MagicGrallocBufferHandle>::Read(const Message* aMsg,
                                             void** aIter, paramType* aResult)
 {
   size_t nbytes;
   size_t nfds;
   const char* data;
   if (!aMsg->ReadSize(aIter, &nbytes) ||
       !aMsg->ReadSize(aIter, &nfds) ||
       !aMsg->ReadBytes(aIter, &data, nbytes)) {
     return false;
   }
   int fds[nfds];
   for (size_t n = 0; n < nfds; ++n) {
     FileDescriptor fd;
     if (!aMsg->ReadFileDescriptor(aIter, &fd)) {
       return false;
     }
     // If the GraphicBuffer was shared cross-process, SCM_RIGHTS does
     // the right thing and dup's the fd.  If it's shared cross-thread,
     // SCM_RIGHTS doesn't dup the fd.  That's surprising, but we just
     // deal with it here.  NB: only the "default" (master) process can
     // alloc gralloc buffers.
     bool sameProcess = (XRE_GetProcessType() == GeckoProcessType_Default);
     int dupFd = sameProcess ? dup(fd.fd) : fd.fd;
     fds[n] = dupFd;
   }
   sp<GraphicBuffer> buffer(new GraphicBuffer());
 #if ANDROID_VERSION >= 19
   // Make a copy of "data" and "fds" for unflatten() to avoid casting problem
   void const *pdata = (void const *)data;
   int const *pfds = fds;
   if (NO_ERROR == buffer->unflatten(pdata, nbytes, pfds, nfds)) {
 #else
   Flattenable *flattenable = buffer.get();
   if (NO_ERROR == flattenable->unflatten(data, nbytes, fds, nfds)) {
 #endif
     aResult->mGraphicBuffer = buffer;
     return true;
   }
   return false;
 }
 } // namespace IPC
 namespace mozilla {
 namespace layers {
 MagicGrallocBufferHandle::MagicGrallocBufferHandle(const sp<GraphicBuffer>& aGraphicBuffer)
   : mGraphicBuffer(aGraphicBuffer)
 {
 }
 //-----------------------------------------------------------------------------
 // Parent process
 static gfxImageFormat
 ImageFormatForPixelFormat(android::PixelFormat aFormat)
 {
   switch (aFormat) {
   case PIXEL_FORMAT_RGBA_8888:
     return gfxImageFormat::ARGB32;
   case PIXEL_FORMAT_RGBX_8888:
     return gfxImageFormat::RGB24;
   case PIXEL_FORMAT_RGB_565:
     return gfxImageFormat::RGB16_565;
   default:
     MOZ_CRASH("Unknown gralloc pixel format");
   }
   return gfxImageFormat::ARGB32;
 }
 static android::PixelFormat
 PixelFormatForImageFormat(gfxImageFormat aFormat)
 {
   switch (aFormat) {
   case gfxImageFormat::ARGB32:
     return android::PIXEL_FORMAT_RGBA_8888;
   case gfxImageFormat::RGB24:
     return android::PIXEL_FORMAT_RGBX_8888;
   case gfxImageFormat::RGB16_565:
     return android::PIXEL_FORMAT_RGB_565;
   case gfxImageFormat::A8:
     NS_WARNING("gralloc does not support gfxImageFormat::A8");
     return android::PIXEL_FORMAT_UNKNOWN;
   default:
     MOZ_CRASH("Unknown gralloc pixel format");
   }
   return android::PIXEL_FORMAT_RGBA_8888;
 }
 static size_t
 BytesPerPixelForPixelFormat(android::PixelFormat aFormat)
 {
   switch (aFormat) {
   case PIXEL_FORMAT_RGBA_8888:
   case PIXEL_FORMAT_RGBX_8888:
   case PIXEL_FORMAT_BGRA_8888:
     return 4;
   case PIXEL_FORMAT_RGB_888:
     return 3;
   case PIXEL_FORMAT_RGB_565:
   case PIXEL_FORMAT_RGBA_5551:
   case PIXEL_FORMAT_RGBA_4444:
     return 2;
   default:
     return 0;
   }
   return 0;
 }
 static android::PixelFormat
 PixelFormatForContentType(gfxContentType aContentType)
 {
   return PixelFormatForImageFormat(
     gfxPlatform::GetPlatform()->OptimalFormatForContent(aContentType));
 }
 static gfxContentType
 ContentTypeFromPixelFormat(android::PixelFormat aFormat)
 {
   return gfxASurface::ContentFromFormat(ImageFormatForPixelFormat(aFormat));
 }
 class GrallocReporter MOZ_FINAL : public nsIMemoryReporter
 {
   friend class GrallocBufferActor;
 public:
   NS_DECL_ISUPPORTS
   GrallocReporter()
   {
 #ifdef DEBUG
     // There must be only one instance of this class, due to |sAmount|
     // being static.  Assert this.
     static bool hasRun = false;
     MOZ_ASSERT(!hasRun);
     hasRun = true;
 #endif
   }
   NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
                             nsISupports* aData)
   {
     return MOZ_COLLECT_REPORT(
       "gralloc", KIND_OTHER, UNITS_BYTES, sAmount,
 "Special RAM that can be shared between processes and directly accessed by "
 "both the CPU and GPU. Gralloc memory is usually a relatively precious "
 "resource, with much less available than generic RAM. When it's exhausted, "
 "graphics performance can suffer. This value can be incorrect because of race "
 "conditions.");
   }
 private:
   static int64_t sAmount;
 };
 NS_IMPL_ISUPPORTS(GrallocReporter, nsIMemoryReporter)
 int64_t GrallocReporter::sAmount = 0;
 void InitGralloc() {
   NS_ASSERTION(NS_IsMainThread(), "Should be on main thread.");
   RegisterStrongMemoryReporter(new GrallocReporter());
 }
 GrallocBufferActor::GrallocBufferActor()
 : mAllocBytes(0)
 , mTextureHost(nullptr)
 {
 }
 GrallocBufferActor::~GrallocBufferActor()
 {
   if (mAllocBytes > 0) {
     GrallocReporter::sAmount -= mAllocBytes;
   }
 }
 /*static*/ PGrallocBufferParent*
 GrallocBufferActor::Create(const gfx::IntSize& aSize,
                            const uint32_t& aFormat,
                            const uint32_t& aUsage,
                            MaybeMagicGrallocBufferHandle* aOutHandle)
 {
   PROFILER_LABEL("GrallocBufferActor", "Create");
   GrallocBufferActor* actor = new GrallocBufferActor();
   *aOutHandle = null_t();
   uint32_t format = aFormat;
   uint32_t usage = aUsage;
   if (format == 0 || usage == 0) {
     printf_stderr("GrallocBufferActor::Create -- format and usage must be non-zero");
     return actor;
   }
   // If the requested size is too big (i.e. exceeds the commonly used max GL texture size)
   // then we risk OOMing the parent process. It's better to just deny the allocation and
   // kill the child process, which is what the following code does.
   // TODO: actually use GL_MAX_TEXTURE_SIZE instead of hardcoding 4096
   if (aSize.width > 4096 || aSize.height > 4096) {
     printf_stderr("GrallocBufferActor::Create -- requested gralloc buffer is too big. Killing child instead.");
     delete actor;
     return nullptr;
   }
   sp<GraphicBuffer> buffer(new GraphicBuffer(aSize.width, aSize.height, format, usage));
   if (buffer->initCheck() != OK)
     return actor;
   size_t bpp = BytesPerPixelForPixelFormat(format);
   actor->mAllocBytes = aSize.width * aSize.height * bpp;
   GrallocReporter::sAmount += actor->mAllocBytes;
   actor->mGraphicBuffer = buffer;
   *aOutHandle = MagicGrallocBufferHandle(buffer);
   return actor;
 }
 void GrallocBufferActor::ActorDestroy(ActorDestroyReason)
 {
   // Used only for hacky fix for bug 966446.
   if (mTextureHost) {
     mTextureHost->ForgetBufferActor();
     mTextureHost = nullptr;
   }
 }
 void GrallocBufferActor::AddTextureHost(TextureHost* aTextureHost)
 {
   mTextureHost = aTextureHost;
 }
 void GrallocBufferActor::RemoveTextureHost()
 {
   mTextureHost = nullptr;
 }
 /*static*/ bool
 LayerManagerComposite::SupportsDirectTexturing()
 {
   return true;
 }
 /*static*/ void
 LayerManagerComposite::PlatformSyncBeforeReplyUpdate()
 {
   // Nothing to be done for gralloc.
 }
 //-----------------------------------------------------------------------------
 // Child process
 /*static*/ PGrallocBufferChild*
 GrallocBufferActor::Create()
 {
   return new GrallocBufferActor();
 }
 void
 GrallocBufferActor::InitFromHandle(const MagicGrallocBufferHandle& aHandle)
 {
   MOZ_ASSERT(!mGraphicBuffer.get());
   MOZ_ASSERT(aHandle.mGraphicBuffer.get());
   mGraphicBuffer = aHandle.mGraphicBuffer;
 }
 PGrallocBufferChild*
 ShadowLayerForwarder::AllocGrallocBuffer(const gfx::IntSize& aSize,
                                          uint32_t aFormat,
                                          uint32_t aUsage,
                                          MaybeMagicGrallocBufferHandle* aHandle)
 {
   if (!mShadowManager->IPCOpen()) {
     return nullptr;
   }
   return mShadowManager->SendPGrallocBufferConstructor(aSize, aFormat, aUsage, aHandle);
 }
 void
 ShadowLayerForwarder::DeallocGrallocBuffer(PGrallocBufferChild* aChild)
 {
   MOZ_ASSERT(aChild);
   PGrallocBufferChild::Send__delete__(aChild);
 }
 //-----------------------------------------------------------------------------
 // Both processes
 android::GraphicBuffer*
 GrallocBufferActor::GetGraphicBuffer()
 {
   return mGraphicBuffer.get();
 }
 /*static*/ void
 ShadowLayerForwarder::PlatformSyncBeforeUpdate()
 {
   // Nothing to be done for gralloc.
 }
 } // namespace layers
 } // namespace mozilla

The Tor Browser / annotate

gfx/layers/ipc/ShadowLayerUtilsGralloc.cpp@b8a032363ba2 (annotated)

gfx/layers/ipc/ShadowLayerUtilsGralloc.cpp