Add null default backend environment variable option

ANGLE_DEFAULT_PLATFORM environment variable now accepts 'null' as a valid option. This will set the default platform type to the null backend. Bug: angleproject:3893 Change-Id: Ieddcdf3ae840f927c1b276e56f3b753b67d9b73d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1784062Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Mohan Maiya <m.maiya@samsung.com> Commit-Queue: Mohan Maiya <m.maiya@samsung.com>

Add null default backend environment variable option
0c35e0f4 · Brandon Schade · Commit Bot · 7e44ec26 · 0c35e0f4
Commit 0c35e0f4 authored Sep 03, 2019 by Brandon Schade Committed by Commit Bot Sep 05, 2019
Hide whitespace changes
Inline Side-by-side

Showing with 8 additions and 1 deletion

Display.cpp src/libANGLE/Display.cpp +8 -1

No files found.
--- a/src/libANGLE/Display.cpp
+++ b/src/libANGLE/Display.cpp
@@ -142,7 +142,7 @@ rx::DisplayImpl *CreateDisplayFromDevice(Device *eglDevice, const DisplayState &
 // On platforms with support for multiple back-ends, allow an environment variable to control
 // the default.  This is useful to run angle with benchmarks without having to modify the
 // benchmark source.  Possible values for this environment variable (ANGLE_DEFAULT_PLATFORM)
-// are: vulkan, gl, d3d11.
+// are: vulkan, gl, d3d11, null.
 EGLAttrib GetDisplayTypeFromEnvironment()
 {
    std::string angleDefaultEnv = angle::GetEnvironmentVar("ANGLE_DEFAULT_PLATFORM");
@@ -169,6 +169,13 @@ EGLAttrib GetDisplayTypeFromEnvironment()
    }
 #endif

+#if defined(ANGLE_ENABLE_NULL)
+    if (angleDefaultEnv == "null")
+    {
+        return EGL_PLATFORM_ANGLE_TYPE_NULL_ANGLE;
+    }
+#endif
+
 #if defined(ANGLE_ENABLE_D3D11)
    return EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE;
 #elif defined(ANGLE_ENABLE_D3D9)