From 797a4eae16d986b62324149d2be40a8d3db60ddf Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Tue, 27 Aug 2019 23:49:05 +1000
Subject: [PATCH] share contexts on all renderthreads

---
 app/node/processor/renderer/renderer.cpp       |  2 +-
 app/node/processor/renderer/rendererthread.cpp |  5 ++++-
 app/node/processor/renderer/rendererthread.h   |  5 ++++-
 app/render/renderinstance.cpp                  | 13 +++++++++++++
 app/render/renderinstance.h                    |  4 ++++
 5 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/app/node/processor/renderer/renderer.cpp b/app/node/processor/renderer/renderer.cpp
index 79f898f63..9bb112edc 100644
--- a/app/node/processor/renderer/renderer.cpp
+++ b/app/node/processor/renderer/renderer.cpp
@@ -192,7 +192,7 @@ void RendererProcessor::Start()
   threads_.resize(QThread::idealThreadCount());
 
   for (int i=0;i<threads_.size();i++) {
-    threads_[i] = std::make_shared<RendererThread>(width_, height_, format_, mode_);
+    threads_[i] = std::make_shared<RendererThread>(QOpenGLContext::currentContext(), width_, height_, format_, mode_);
     threads_[i]->StartThread(QThread::HighPriority);
 
     // Ensure this connection is "Queued" so that it always runs in this object's threaded rather than any of the
diff --git a/app/node/processor/renderer/rendererthread.cpp b/app/node/processor/renderer/rendererthread.cpp
index 3f40a6918..21654dedb 100644
--- a/app/node/processor/renderer/rendererthread.cpp
+++ b/app/node/processor/renderer/rendererthread.cpp
@@ -22,7 +22,8 @@
 
 #include <QDebug>
 
-RendererThread::RendererThread(const int &width, const int &height, const olive::PixelFormat &format, const olive::RenderMode &mode) :
+RendererThread::RendererThread(QOpenGLContext *share_ctx, const int &width, const int &height, const olive::PixelFormat &format, const olive::RenderMode &mode) :
+  share_ctx_(share_ctx),
   cancelled_(false),
   width_(width),
   height_(height),
@@ -80,6 +81,8 @@ void RendererThread::run()
   RenderInstance instance(width_, height_, format_, mode_);
   render_instance_ = &instance;
 
+  instance.SetShareContext(share_ctx_);
+
   // Allocate and create resources
   if (instance.Start()) {
 
diff --git a/app/node/processor/renderer/rendererthread.h b/app/node/processor/renderer/rendererthread.h
index 91856cd80..0f9abe3a1 100644
--- a/app/node/processor/renderer/rendererthread.h
+++ b/app/node/processor/renderer/rendererthread.h
@@ -34,7 +34,8 @@ class RendererThread : public QThread
 {
   Q_OBJECT
 public:
-  RendererThread(const int& width,
+  RendererThread(QOpenGLContext* share_ctx,
+                 const int& width,
                  const int& height,
                  const olive::PixelFormat& format,
                  const olive::RenderMode& mode);
@@ -53,6 +54,8 @@ signals:
   void FinishedPath();
 
 private:
+  QOpenGLContext* share_ctx_;
+
   QWaitCondition wait_cond_;
 
   QMutex mutex_;
diff --git a/app/render/renderinstance.cpp b/app/render/renderinstance.cpp
index b0d72a942..9a49d3720 100644
--- a/app/render/renderinstance.cpp
+++ b/app/render/renderinstance.cpp
@@ -26,6 +26,7 @@ RenderInstance::RenderInstance(const int& width,
                                const int& height,
                                const olive::PixelFormat& format,
                                const olive::RenderMode& mode) :
+  share_ctx_(nullptr),
   width_(width),
   height_(height),
   format_(format),
@@ -33,8 +34,20 @@ RenderInstance::RenderInstance(const int& width,
 {
 }
 
+void RenderInstance::SetShareContext(QOpenGLContext *share)
+{
+  Q_ASSERT(!IsStarted());
+
+  share_ctx_ = share;
+}
+
 bool RenderInstance::Start()
 {
+  // If we're sharing resources, set this up now
+  if (share_ctx_ != nullptr) {
+    ctx_.setShareContext(share_ctx_);
+  }
+
   // Create OpenGL context (automatically destroys any existing if there is one)
   if (!ctx_.create()) {
     qWarning() << tr("Failed to create OpenGL context in thread %1").arg(reinterpret_cast<quintptr>(this));
diff --git a/app/render/renderinstance.h b/app/render/renderinstance.h
index 58a390309..01b518eb0 100644
--- a/app/render/renderinstance.h
+++ b/app/render/renderinstance.h
@@ -43,6 +43,8 @@ public:
                  const olive::PixelFormat& format,
                  const olive::RenderMode& mode);
 
+  void SetShareContext(QOpenGLContext* share);
+
   bool Start();
 
   void Stop();
@@ -54,6 +56,8 @@ public:
 private:
   QOpenGLContext ctx_;
 
+  QOpenGLContext* share_ctx_;
+
   QOffscreenSurface surface_;
 
   RenderFramebuffer buffer_;