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authorMichael Lutz <michi@icosahedron.de>2021-01-16 16:43:18 +0100
committerMichael Lutz <michi@icosahedron.de>2021-02-22 22:16:07 +0100
commitb1818596294346a87bcb2ddb23d0b471c5c31284 (patch)
tree38cd657acb71ded902050cf05a0f11601838c738 /src
parent9a069faa0135b02f3ea8601594e174ada73fcd74 (diff)
downloadopenttd-b1818596294346a87bcb2ddb23d0b471c5c31284.tar.xz
Change: [Win32] Disable VSync for OpenGL by default.
Diffstat (limited to 'src')
-rw-r--r--src/video/win32_v.cpp12
-rw-r--r--src/video/win32_v.h1
2 files changed, 13 insertions, 0 deletions
diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
index 975fee974..e32b80497 100644
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -1328,6 +1328,7 @@ void VideoDriver_Win32GDI::PaintThread()
#endif
static PFNWGLCREATECONTEXTATTRIBSARBPROC _wglCreateContextAttribsARB = nullptr;
+static PFNWGLSWAPINTERVALEXTPROC _wglSwapIntervalEXT = nullptr;
static bool _hasWGLARBCreateContextProfile = false; ///< Is WGL_ARB_create_context_profile supported?
/** Platform-specific callback to get an OpenGL funtion pointer. */
@@ -1398,6 +1399,9 @@ static void LoadWGLExtensions()
_wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
}
_hasWGLARBCreateContextProfile = FindStringInExtensionList(wgl_exts, "WGL_ARB_create_context_profile") != nullptr;
+ if (FindStringInExtensionList(wgl_exts, "WGL_EXT_swap_control") != nullptr) {
+ _wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
+ }
}
wglMakeCurrent(nullptr, nullptr);
@@ -1416,6 +1420,7 @@ const char *VideoDriver_Win32OpenGL::Start(const StringList &param)
if (BlitterFactory::GetCurrentBlitter()->GetScreenDepth() != 32) return "Only 32bpp blitters supported";
Dimension old_res = _cur_resolution; // Save current screen resolution in case of errors, as MakeWindow invalidates it.
+ this->vsync = GetDriverParamBool(param, "vsync");
LoadWGLExtensions();
@@ -1487,6 +1492,13 @@ const char *VideoDriver_Win32OpenGL::AllocateContext()
}
if (!wglMakeCurrent(this->dc, rc)) return "Can't active GL context";
+ /* Enable/disable Vsync if supported. */
+ if (_wglSwapIntervalEXT != nullptr) {
+ _wglSwapIntervalEXT(this->vsync ? 1 : 0);
+ } else if (vsync) {
+ DEBUG(driver, 0, "OpenGL: Vsync requested, but not supported by driver");
+ }
+
this->gl_rc = rc;
return OpenGLBackend::Create(&GetOGLProcAddressCallback);
}
diff --git a/src/video/win32_v.h b/src/video/win32_v.h
index 061f39c0a..1ec3517d1 100644
--- a/src/video/win32_v.h
+++ b/src/video/win32_v.h
@@ -143,6 +143,7 @@ public:
protected:
HDC dc; ///< Window device context.
HGLRC gl_rc; ///< OpenGL context.
+ bool vsync; ///< Enable VSync?
uint8 GetFullscreenBpp() override { return 32; } // OpenGL is always 32 bpp.