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 /* -*- 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 "CompositableTransactionParent.h"

 #include "CompositableHost.h"           // for CompositableParent, etc

 #include "CompositorParent.h"           // for CompositorParent

 #include "GLContext.h"                  // for GLContext

 #include "Layers.h"                     // for Layer

 #include "RenderTrace.h"                // for RenderTraceInvalidateEnd, etc

 #include "TiledLayerBuffer.h"           // for TiledLayerComposer

 #include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc

 #include "mozilla/RefPtr.h"             // for RefPtr

 #include "mozilla/layers/CompositorTypes.h"

 #include "mozilla/layers/ContentHost.h"  // for ContentHostBase

 #include "mozilla/layers/LayerManagerComposite.h"

 #include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor

 #include "mozilla/layers/LayersTypes.h"  // for MOZ_LAYERS_LOG

 #include "mozilla/layers/TextureHost.h"  // for TextureHost

 #include "mozilla/layers/TextureHostOGL.h"  // for TextureHostOGL

 #include "mozilla/layers/ThebesLayerComposite.h"

 #include "mozilla/mozalloc.h"           // for operator delete

 #include "nsDebug.h"                    // for NS_WARNING, NS_ASSERTION

 #include "nsRegion.h"                   // for nsIntRegion

 namespace mozilla {

 namespace layers {

 class ClientTiledLayerBuffer;

 class Compositor;

 template<typename Op>

 CompositableHost* AsCompositable(const Op& op)

 {

   return CompositableHost::FromIPDLActor(op.compositableParent());

 }

 // This function can in some cases fail and return false without it being a bug.

 // This can theoretically happen if the ImageBridge sends frames before

 // we created the layer tree. Since we can't enforce that the layer

 // tree is already created before ImageBridge operates, there isn't much

 // we can do about it, but in practice it is very rare.

 // Typically when a tab with a video is dragged from a window to another,

 // there can be a short time when the video is still sending frames

 // asynchonously while the layer tree is not reconstructed. It's not a

 // big deal.

 // Note that Layers transactions do not need to call this because they always

 // schedule the composition, in LayerManagerComposite::EndTransaction.

 template<typename T>

 bool ScheduleComposition(const T& op)

 {

   CompositableHost* comp = AsCompositable(op);

   uint64_t id = comp->GetCompositorID();

   if (!comp || !id) {

     return false;

   }

   CompositorParent* cp = CompositorParent::GetCompositor(id);

   if (!cp) {

     return false;

   }

   cp->ScheduleComposition();

   return true;

 }

 bool

 CompositableParentManager::ReceiveCompositableUpdate(const CompositableOperation& aEdit,

                                                      EditReplyVector& replyv)

 {

   switch (aEdit.type()) {

     case CompositableOperation::TOpCreatedIncrementalTexture: {

       MOZ_LAYERS_LOG(("[ParentSide] Created texture"));

       const OpCreatedIncrementalTexture& op = aEdit.get_OpCreatedIncrementalTexture();

       CompositableHost* compositable = AsCompositable(op);

       bool success =

         compositable->CreatedIncrementalTexture(this,

                                                 op.textureInfo(),

                                                 op.bufferRect());

       if (!success) {

         return false;

       }

       break;

     }

     case CompositableOperation::TOpPaintTextureRegion: {

       MOZ_LAYERS_LOG(("[ParentSide] Paint ThebesLayer"));

       const OpPaintTextureRegion& op = aEdit.get_OpPaintTextureRegion();

       CompositableHost* compositable = AsCompositable(op);

       Layer* layer = compositable->GetLayer();

       if (!layer || layer->GetType() != Layer::TYPE_THEBES) {

         return false;

       }

       ThebesLayerComposite* thebes = static_cast<ThebesLayerComposite*>(layer);

       const ThebesBufferData& bufferData = op.bufferData();

       RenderTraceInvalidateStart(thebes, "FF00FF", op.updatedRegion().GetBounds());

       nsIntRegion frontUpdatedRegion;

       if (!compositable->UpdateThebes(bufferData,

                                       op.updatedRegion(),

                                       thebes->GetValidRegion(),

                                       &frontUpdatedRegion))

       {

         return false;

       }

       replyv.push_back(

         OpContentBufferSwap(op.compositableParent(), nullptr, frontUpdatedRegion));

       RenderTraceInvalidateEnd(thebes, "FF00FF");

       // return texure data to client if necessary

       ReturnTextureDataIfNecessary(compositable, replyv, op.compositableParent());

       break;

     }

     case CompositableOperation::TOpPaintTextureIncremental: {

       MOZ_LAYERS_LOG(("[ParentSide] Paint ThebesLayer"));

       const OpPaintTextureIncremental& op = aEdit.get_OpPaintTextureIncremental();

       CompositableHost* compositable = AsCompositable(op);

       SurfaceDescriptor desc = op.image();

       compositable->UpdateIncremental(op.textureId(),

                                       desc,

                                       op.updatedRegion(),

                                       op.bufferRect(),

                                       op.bufferRotation());

       break;

     }

     case CompositableOperation::TOpUpdatePictureRect: {

       const OpUpdatePictureRect& op = aEdit.get_OpUpdatePictureRect();

       CompositableHost* compositable = AsCompositable(op);

       MOZ_ASSERT(compositable);

       compositable->SetPictureRect(op.picture());

       break;

     }

     case CompositableOperation::TOpUseTiledLayerBuffer: {

       MOZ_LAYERS_LOG(("[ParentSide] Paint TiledLayerBuffer"));

       const OpUseTiledLayerBuffer& op = aEdit.get_OpUseTiledLayerBuffer();

       CompositableHost* compositable = AsCompositable(op);

       TiledLayerComposer* tileComposer = compositable->AsTiledLayerComposer();

       NS_ASSERTION(tileComposer, "compositable is not a tile composer");

       const SurfaceDescriptorTiles& tileDesc = op.tileLayerDescriptor();

       tileComposer->UseTiledLayerBuffer(this, tileDesc);

       break;

     }

     case CompositableOperation::TOpRemoveTexture: {

       const OpRemoveTexture& op = aEdit.get_OpRemoveTexture();

       CompositableHost* compositable = AsCompositable(op);

       RefPtr<TextureHost> tex = TextureHost::AsTextureHost(op.textureParent());

       MOZ_ASSERT(tex.get());

       compositable->RemoveTextureHost(tex);

       // return texure data to client if necessary

       ReturnTextureDataIfNecessary(compositable, replyv, op.compositableParent());

       break;

     }

     case CompositableOperation::TOpUseTexture: {

       const OpUseTexture& op = aEdit.get_OpUseTexture();

       CompositableHost* compositable = AsCompositable(op);

       RefPtr<TextureHost> tex = TextureHost::AsTextureHost(op.textureParent());

       MOZ_ASSERT(tex.get());

       compositable->UseTextureHost(tex);

       if (IsAsync()) {

         ScheduleComposition(op);

         // Async layer updates don't trigger invalidation, manually tell the layer

         // that its content have changed.

         if (compositable->GetLayer()) {

           compositable->GetLayer()->SetInvalidRectToVisibleRegion();

         }

       }

       // return texure data to client if necessary

       ReturnTextureDataIfNecessary(compositable, replyv, op.compositableParent());

       break;

     }

     case CompositableOperation::TOpUseComponentAlphaTextures: {

       const OpUseComponentAlphaTextures& op = aEdit.get_OpUseComponentAlphaTextures();

       CompositableHost* compositable = AsCompositable(op);

       RefPtr<TextureHost> texOnBlack = TextureHost::AsTextureHost(op.textureOnBlackParent());

       RefPtr<TextureHost> texOnWhite = TextureHost::AsTextureHost(op.textureOnWhiteParent());

       MOZ_ASSERT(texOnBlack && texOnWhite);

       compositable->UseComponentAlphaTextures(texOnBlack, texOnWhite);

       if (IsAsync()) {

         ScheduleComposition(op);

       }

       // return texure data to client if necessary

       ReturnTextureDataIfNecessary(compositable, replyv, op.compositableParent());

       break;

     }

     case CompositableOperation::TOpUpdateTexture: {

       const OpUpdateTexture& op = aEdit.get_OpUpdateTexture();

       RefPtr<TextureHost> texture = TextureHost::AsTextureHost(op.textureParent());

       MOZ_ASSERT(texture);

       texture->Updated(op.region().type() == MaybeRegion::TnsIntRegion

                        ? &op.region().get_nsIntRegion()

                        : nullptr); // no region means invalidate the entire surface

       break;

     }

     default: {

       MOZ_ASSERT(false, "bad type");

     }

   }

   return true;

 }

 #if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17

 void

 CompositableParentManager::ReturnTextureDataIfNecessary(CompositableHost* aCompositable,

                                                         EditReplyVector& replyv,

                                                         PCompositableParent* aParent)

 {

   if (!aCompositable || !aCompositable->GetCompositableBackendSpecificData()) {

     return;

   }

   const std::vector< RefPtr<TextureHost> > textureList =

         aCompositable->GetCompositableBackendSpecificData()->GetPendingReleaseFenceTextureList();

   // Return pending Texture data

   for (size_t i = 0; i < textureList.size(); i++) {

     // File descriptor number is limited to 4 per IPC message.

     // See Bug 986253

     if (mPrevFenceHandles.size() >= 4) {

       break;

     }

     TextureHostOGL* hostOGL = textureList[i]->AsHostOGL();

     PTextureParent* actor = textureList[i]->GetIPDLActor();

     if (!hostOGL || !actor) {

       continue;

     }

     android::sp<android::Fence> fence = hostOGL->GetAndResetReleaseFence();

     if (fence.get() && fence->isValid()) {

       FenceHandle handle = FenceHandle(fence);

       replyv.push_back(ReturnReleaseFence(aParent, nullptr, actor, nullptr, handle));

       // Hold fence handle to prevent fence's file descriptor is closed before IPC happens.

       mPrevFenceHandles.push_back(handle);

     }

   }

   aCompositable->GetCompositableBackendSpecificData()->ClearPendingReleaseFenceTextureList();

 }

 #else

 void

 CompositableParentManager::ReturnTextureDataIfNecessary(CompositableHost* aCompositable,

                                                        EditReplyVector& replyv,

                                                        PCompositableParent* aParent)

 {

   if (!aCompositable || !aCompositable->GetCompositableBackendSpecificData()) {

     return;

   }

   aCompositable->GetCompositableBackendSpecificData()->ClearPendingReleaseFenceTextureList();

 }

 #endif

 void

 CompositableParentManager::ClearPrevFenceHandles()

 {

   mPrevFenceHandles.clear();

 }

 } // namespace

 } // namespace