tor-browser

HostWebGLContext.cpp (6043B)

---

/* -*- 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 "HostWebGLContext.h"

#include "CompositableHost.h"
#include "MozFramebuffer.h"
#include "TexUnpackBlob.h"
#include "WebGL2Context.h"
#include "WebGLBuffer.h"
#include "WebGLContext.h"
#include "WebGLFramebuffer.h"
#include "WebGLMemoryTracker.h"
#include "WebGLParent.h"
#include "WebGLProgram.h"
#include "WebGLQuery.h"
#include "WebGLRenderbuffer.h"
#include "WebGLSampler.h"
#include "WebGLShader.h"
#include "WebGLSync.h"
#include "WebGLTexture.h"
#include "WebGLTransformFeedback.h"
#include "WebGLVertexArray.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/layers/LayersSurfaces.h"

namespace mozilla {

// -

static StaticMutex sContextSetLock MOZ_UNANNOTATED;

static std::unordered_set<HostWebGLContext*>& DeferredStaticContextSet() {
 static std::unordered_set<HostWebGLContext*> sContextSet;
 return sContextSet;
}

LockedOutstandingContexts::LockedOutstandingContexts()
   : contexts(DeferredStaticContextSet()) {
 sContextSetLock.Lock();
}

LockedOutstandingContexts::~LockedOutstandingContexts() {
 sContextSetLock.Unlock();
}

// -

/*static*/
std::unique_ptr<HostWebGLContext> HostWebGLContext::Create(
   const OwnerData& ownerData, const webgl::InitContextDesc& desc,
   webgl::InitContextResult* const out) {
 auto host =
     std::unique_ptr<HostWebGLContext>(new HostWebGLContext(ownerData));
 auto webgl = WebGLContext::Create(host.get(), desc, out);
 if (!webgl) return nullptr;
 return host;
}

HostWebGLContext::HostWebGLContext(const OwnerData& ownerData)
   : mOwnerData(ownerData) {
 StaticMutexAutoLock lock(sContextSetLock);
 auto& contexts = DeferredStaticContextSet();
 (void)contexts.insert(this);
}

HostWebGLContext::~HostWebGLContext() {
 StaticMutexAutoLock lock(sContextSetLock);
 auto& contexts = DeferredStaticContextSet();
 (void)contexts.erase(this);
}

// -

void HostWebGLContext::OnContextLoss(const webgl::ContextLossReason reason) {
 if (mOwnerData.inProcess) {
   mOwnerData.inProcess->OnContextLoss(reason);
 } else {
   (void)mOwnerData.outOfProcess->SendOnContextLoss(reason);
 }
}

void HostWebGLContext::JsWarning(const std::string& text) const {
 if (mOwnerData.inProcess) {
   mOwnerData.inProcess->JsWarning(text);
   return;
 }
 (void)mOwnerData.outOfProcess->SendJsWarning(text);
}

Maybe<layers::SurfaceDescriptor> HostWebGLContext::GetFrontBuffer(
   const ObjectId xrFb, const bool webvr) const {
 return mContext->GetFrontBuffer(AutoResolve(xrFb), webvr);
}

//////////////////////////////////////////////
// Creation

void HostWebGLContext::CreateBuffer(const ObjectId id) {
 auto& slot = mBufferMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateBuffer();
}

void HostWebGLContext::CreateFramebuffer(const ObjectId id) {
 auto& slot = mFramebufferMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateFramebuffer();
}

bool HostWebGLContext::CreateOpaqueFramebuffer(
   const ObjectId id, const webgl::OpaqueFramebufferOptions& options) {
 auto& slot = mFramebufferMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return false;
 }
 slot = mContext->CreateOpaqueFramebuffer(options);
 return slot;
}

void HostWebGLContext::CreateProgram(const ObjectId id) {
 auto& slot = mProgramMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateProgram();
}

void HostWebGLContext::CreateQuery(const ObjectId id) {
 auto& slot = mQueryMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateQuery();
}

void HostWebGLContext::CreateRenderbuffer(const ObjectId id) {
 auto& slot = mRenderbufferMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateRenderbuffer();
}

void HostWebGLContext::CreateSampler(const ObjectId id) {
 auto& slot = mSamplerMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = GetWebGL2Context()->CreateSampler();
}

void HostWebGLContext::CreateShader(const ObjectId id, GLenum type) {
 auto& slot = mShaderMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateShader(type);
}

void HostWebGLContext::CreateSync(const ObjectId id) {
 auto& slot = mSyncMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = GetWebGL2Context()->FenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);

 if (!slot) return;

 slot->OnCompleteTaskAdd([host = WeakPtr{this}, id]() {
   if (!host) return;
   if (host->mOwnerData.inProcess) {
     host->mOwnerData.inProcess->OnSyncComplete(id);
   } else if (host->mOwnerData.outOfProcess) {
     (void)host->mOwnerData.outOfProcess->SendOnSyncComplete(id);
   }
 });
}

void HostWebGLContext::CreateTexture(const ObjectId id) {
 auto& slot = mTextureMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateTexture();
}

void HostWebGLContext::CreateTransformFeedback(const ObjectId id) {
 auto& slot = mTransformFeedbackMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = GetWebGL2Context()->CreateTransformFeedback();
}

void HostWebGLContext::CreateVertexArray(const ObjectId id) {
 auto& slot = mVertexArrayMap[id];
 if (slot) {
   MOZ_ASSERT(false, "duplicate ID");
   return;
 }
 slot = mContext->CreateVertexArray();
}

////////////////////////

#define _(X) \
 void HostWebGLContext::Delete##X(const ObjectId id) { m##X##Map.erase(id); }

_(Buffer)
_(Framebuffer)
_(Program)
_(Query)
_(Renderbuffer)
_(Sampler)
_(Shader)
_(Sync)
_(Texture)
_(TransformFeedback)
_(VertexArray)

#undef _

}  // namespace mozilla