Made a proper command-line flag out of disabling GL context resetting. --disable_gl_context_reset

src/xenia/gpu/gl4/gl4_gpu-private.h

@@ -15,6 +15,7 @@
 #include "xenia/gpu/gl4/gl4_gpu.h"
 
 DECLARE_bool(thread_safe_gl);
+DECLARE_bool(disable_gl_context_reset);
 
 DECLARE_bool(gl_debug_output);
 DECLARE_bool(gl_debug_output_synchronous);

src/xenia/gpu/gl4/gl4_gpu.cc

@@ -15,6 +15,10 @@
 DEFINE_bool(thread_safe_gl, false,
             "Only allow one GL context to be active at a time.");
 
+DEFINE_bool(disable_gl_context_reset, false,
+            "Do not aggressively reset the GL context (helps with capture "
+            "programs such as OBS or FRAPS).");
+
 DEFINE_bool(gl_debug_output, false, "Dump ARB_debug_output to stderr.");
 DEFINE_bool(gl_debug_output_synchronous, true,
             "ARB_debug_output will synchronize to be thread safe.");

src/xenia/gpu/gl4/gl_context.cc

@@ -332,7 +332,9 @@ bool GLContext::MakeCurrent() {
 }
 
 void GLContext::ClearCurrent() {
-  wglMakeCurrent(nullptr, nullptr);
+  if (!FLAGS_disable_gl_context_reset) {
+    wglMakeCurrent(nullptr, nullptr);
+  }
   tls_glew_context_ = nullptr;
   tls_wglew_context_ = nullptr;