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Change: [Win32] Disable VSync for OpenGL by default.

This commit is contained in:
Michael Lutz 2021-01-16 16:43:18 +01:00
parent 9a069faa01
commit b181859629
2 changed files with 13 additions and 0 deletions
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12
src/video/win32_v.cpp
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@ -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);
}

1
src/video/win32_v.h
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@ -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.