[GPU] GLES2 lost context recovery

webkit/tools/pepper_test_plugin/plugin_object.cc

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 290 matching lines @@
       device2d_(NULL),
       device3d_(NULL),
 #if !defined(INDEPENDENT_PLUGIN)
       pgl_context_(NULL),
 #endif
       deviceaudio_(NULL) {
   memset(&context_audio_, 0, sizeof(context_audio_));
 }
 
 PluginObject::~PluginObject() {
+#if !defined(INDEPENDENT_PLUGIN)
+  if (pgl_context_)
+    Destroy3D();
+#endif
+
   deviceaudio_->destroyContext(npp_, &context_audio_);
   // FIXME(brettw) destroy the context.
   browser->releaseobject(test_object_);
 }
 
 // static
 NPClass* PluginObject::GetPluginClass() {
   return &plugin_class;
 }
 
@@ skipping 24 matching lines @@
   CHECK(device2d_);
 
   device3d_ = extensions->acquireDevice(npp_, NPPepper3DDevice);
   CHECK(device3d_);
 
   deviceaudio_ =  extensions->acquireDevice(npp_, NPPepperAudioDevice);
   CHECK(deviceaudio_);
 }
 
 void PluginObject::SetWindow(const NPWindow& window) {
+  width_ = window.width;
+  height_ = window.height;
+
   if (dimensions_ == 2) {
-    width_ = window.width;
-    height_ = window.height;
-
     NPDeviceContext2DConfig config;
     NPDeviceContext2D context;
     device2d_->initializeContext(npp_, &config, &context);
 
     DrawSampleBitmap(context.region, width_, height_);
 
     // TODO(brettw) figure out why this cast is necessary, the functions seem to
     // match. Could be a calling convention mismatch?
     NPDeviceFlushContextCallbackPtr callback =
         reinterpret_cast<NPDeviceFlushContextCallbackPtr>(&FlushCallback);
     device2d_->flushContext(npp_, &context, callback, NULL);
   } else {
 #if !defined(INDEPENDENT_PLUGIN)
-    if (!pgl_context_) {
-      // Initialize a 3D context.
-      NPDeviceContext3DConfig config;
-      config.commandBufferSize = kCommandBufferSize;
-      device3d_->initializeContext(npp_, &config, &context3d_);
-
-      // Create a PGL context.
-      pgl_context_ = pglCreateContext(npp_, device3d_, &context3d_);
-    }
-
-    // Reset the viewport to new window size.
-    pglMakeCurrent(pgl_context_);
-    glViewport(0, 0, window.width, window.height);
-    pglMakeCurrent(NULL);
+    if (!pgl_context_)
+      Initialize3D();
 
     // Schedule the first call to Draw.
     browser->pluginthreadasynccall(npp_, Draw3DCallback, this);
 #endif
   }
 
   // testing any field would do
   if (!context_audio_.config.callback) {
     NPDeviceContextAudioConfig cfg;
     cfg.sampleRate       = 44100;
     cfg.sampleType       = NPAudioSampleTypeInt16;
     cfg.outputChannelMap = NPAudioChannelStereo;
     cfg.inputChannelMap  = NPAudioChannelNone;
     cfg.sampleFrameCount = 2048;
     cfg.flags            = 0;
     cfg.callback         = &SineWaveCallback<200, int16>;
     deviceaudio_->initializeContext(npp_, &cfg, &context_audio_);
   }
 }
 
+void PluginObject::Initialize3D() {
+#if !defined(INDEPENDENT_PLUGIN)
+  DCHECK(!pgl_context_);
+
+  // Initialize a 3D context.
+  NPDeviceContext3DConfig config;
+  config.commandBufferSize = kCommandBufferSize;
+  device3d_->initializeContext(npp_, &config, &context3d_);
+
+  // Create a PGL context.
+  pgl_context_ = pglCreateContext(npp_, device3d_, &context3d_);
+
+  // Initialize the demo GL state.
+  pglMakeCurrent(pgl_context_);
+  GLFromCPPInit();
+  pglMakeCurrent(NULL);
+#endif  // INDEPENDENT_PLUGIN
+}
+
+void PluginObject::Destroy3D() {
+#if !defined(INDEPENDENT_PLUGIN)
+  DCHECK(pgl_context_);
+
+  // Destroy the PGL context.
+  pglDestroyContext(pgl_context_);
+  pgl_context_ = NULL;
+
+  // Destroy the Device3D context.
+  device3d_->destroyContext(npp_, &context3d_);
+#endif  // INDEPENDENT_PLUGIN
+}
+
 void PluginObject::Draw3D() {
 #if !defined(INDEPENDENT_PLUGIN)
-  // Render some stuff.
-  pglMakeCurrent(pgl_context_);
-  GLFromCPPTestFunction();
+  if (!pglMakeCurrent(pgl_context_) && pglGetError() == PGL_CONTEXT_LOST) {
+    Destroy3D();
+    Initialize3D();
+    pglMakeCurrent(pgl_context_);
+  }
+
+  glViewport(0, 0, width_, height_);
+  GLFromCPPDraw();
   pglSwapBuffers();
   pglMakeCurrent(NULL);
 
   // Schedule another call to Draw.
   browser->pluginthreadasynccall(npp_, Draw3DCallback, this);
-#endif
+#endif  // INDEPENDENT_PLUGIN
 }