diff options
Diffstat (limited to 'platform/windows/context_gl_windows.cpp')
| -rw-r--r-- | platform/windows/context_gl_windows.cpp | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/platform/windows/context_gl_windows.cpp b/platform/windows/context_gl_windows.cpp index e715999378..21d954a736 100644 --- a/platform/windows/context_gl_windows.cpp +++ b/platform/windows/context_gl_windows.cpp @@ -5,8 +5,8 @@ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ -/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */ -/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */ +/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ @@ -34,6 +34,8 @@ #include "context_gl_windows.h" +#include <dwmapi.h> + #define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091 #define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092 #define WGL_CONTEXT_FLAGS_ARB 0x2094 @@ -63,16 +65,52 @@ int ContextGL_Windows::get_window_height() { return OS::get_singleton()->get_video_mode().height; } +bool ContextGL_Windows::should_vsync_via_compositor() { + + if (OS::get_singleton()->is_window_fullscreen() || !OS::get_singleton()->is_vsync_via_compositor_enabled()) { + return false; + } + + // Note: All Windows versions supported by Godot have a compositor. + // It can be disabled on earlier Windows versions. + BOOL dwm_enabled; + + if (SUCCEEDED(DwmIsCompositionEnabled(&dwm_enabled))) { + return dwm_enabled; + } + + return false; +} + void ContextGL_Windows::swap_buffers() { SwapBuffers(hDC); + + if (use_vsync) { + bool vsync_via_compositor_now = should_vsync_via_compositor(); + + if (vsync_via_compositor_now) { + DwmFlush(); + } + + if (vsync_via_compositor_now != vsync_via_compositor) { + // The previous frame had a different operating mode than this + // frame. Set the 'vsync_via_compositor' member variable and the + // OpenGL swap interval to their proper values. + set_use_vsync(true); + } + } } void ContextGL_Windows::set_use_vsync(bool p_use) { + vsync_via_compositor = p_use && should_vsync_via_compositor(); + if (wglSwapIntervalEXT) { - wglSwapIntervalEXT(p_use ? 1 : 0); + int swap_interval = (p_use && !vsync_via_compositor) ? 1 : 0; + wglSwapIntervalEXT(swap_interval); } + use_vsync = p_use; } @@ -177,6 +215,7 @@ ContextGL_Windows::ContextGL_Windows(HWND hwnd, bool p_opengl_3_context) { opengl_3_context = p_opengl_3_context; hWnd = hwnd; use_vsync = false; + vsync_via_compositor = false; } ContextGL_Windows::~ContextGL_Windows() { |