OpenGL: Fix fast-forward on some OpenGL drivers where it may block early

CHANGES

@@ -28,6 +28,7 @@ Bugfixes:
  - GBA: Fix warnings when creating and loading savestates
  - Qt: Add additional checks in CheatModel to prevent crashes
  - GBA Hardware: Fix Game Boy Player rumble in Pokemon Pinball
+ - OpenGL: Fix fast-forward on some OpenGL drivers where it may block early
 Misc:
  - Qt: Window size command line options are now supported
  - Qt: Increase usability of key mapper

src/platform/qt/DisplayGL.cpp

@@ -16,7 +16,7 @@ extern "C" {
 #endif
 #if !defined(_WIN32) || defined(USE_EPOXY)
 #include "platform/opengl/gles2.h"
-#ifdef _WIN32 
+#ifdef _WIN32
 #include <epoxy/wgl.h>
 #endif
 #endif
@@ -264,10 +264,10 @@ void PainterGL::draw() {
 	}
 	if (GBASyncWaitFrameStart(&m_context->sync) || !m_queue.isEmpty()) {
 		dequeue();
+		GBASyncWaitFrameEnd(&m_context->sync);
 		m_painter.begin(m_gl->context()->device());
 		performDraw();
 		m_painter.end();
-		GBASyncWaitFrameEnd(&m_context->sync);
 		m_backend->swap(m_backend);
 	} else {
 		GBASyncWaitFrameEnd(&m_context->sync);

src/platform/sdl/gl-sdl.c

@@ -64,8 +64,8 @@ void GBASDLGLRunloop(struct GBAThread* context, struct SDLSoftwareRenderer* rend
 		if (GBASyncWaitFrameStart(&context->sync)) {
 			v->postFrame(v, renderer->d.outputBuffer);
 		}
-		v->drawFrame(v);
 		GBASyncWaitFrameEnd(&context->sync);
+		v->drawFrame(v);
 		v->swap(v);
 	}
 }

src/platform/sdl/gles2-sdl.c

@@ -117,8 +117,8 @@ void GBASDLGLES2Runloop(struct GBAThread* context, struct SDLSoftwareRenderer* r
 		if (GBASyncWaitFrameStart(&context->sync)) {
 			v->postFrame(v, renderer->d.outputBuffer);
 		}
-		v->drawFrame(v);
 		GBASyncWaitFrameEnd(&context->sync);
+		v->drawFrame(v);
 #ifdef BUILD_RASPI
 		eglSwapBuffers(renderer->display, renderer->surface);
 #else