commit 24ddc7a894d19d269fa3a266f5ee506806a9ea82
author Geoff Lang <geofflang@chromium.org> Mon Jun 11 14:56:34 2018 -0400
committer Commit Bot <commit-bot@chromium.org> Thu Jun 21 20:21:27 2018 +0000
tree 6522f596fb1f2e07764f5484beaecaa5a122baf1
parent 5bdf8bd1cf5664c4b4f8184026135e2ca307f1c0

WGL: Support unvirtualized contexts and unsafe multithreading.

When using unvirtualized contexts, DisplayWGL still creates a Renderer for
managing any internal GL resources such as emulated back buffers for
DXGISwapChainWindowSurfaceWGL or D3DTextureSurfaceWGL but also creates a new
Renderer for each GL context.  All created contexts share resources.

BUG=angleproject:2464

Change-Id: I945502514079368e062beef70bed49c61ed44403
Reviewed-on: https://chromium-review.googlesource.com/1097459
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

src/libANGLE/renderer/renderer_utils.cpp

diff --git a/src/libANGLE/renderer/renderer_utils.cpp b/src/libANGLE/renderer/renderer_utils.cpp
index 5bfecd1..07a68a1 100644
--- a/src/libANGLE/renderer/renderer_utils.cpp
+++ b/src/libANGLE/renderer/renderer_utils.cpp
@@ -442,6 +442,20 @@
 #endif  // defined(ANGLE_ENABLE_ASSERTS)
 }
 
+bool ShouldUseVirtualizedContexts(const egl::AttributeMap &attribs, bool defaultValue)
+{
+    EGLAttrib virtualizedContextRequest =
+        attribs.get(EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE, EGL_DONT_CARE);
+    if (defaultValue)
+    {
+        return (virtualizedContextRequest != EGL_FALSE);
+    }
+    else
+    {
+        return (virtualizedContextRequest == EGL_TRUE);
+    }
+}
+
 void CopyImageCHROMIUM(const uint8_t *sourceData,
                        size_t sourceRowPitch,
                        size_t sourcePixelBytes,