ShuriZma
/
duckstation
mirror of https://github.com/stenzek/duckstation
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Qt: Hack for setting swap interval at runtime (currently Windows only)

This commit is contained in:
Connor McLaughlin 2020-01-02 16:26:12 +10:00
parent b135b32159
commit ac6a7bad3f
1 changed files with 37 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
src/duckstation-qt/opengldisplaywindow.cpp
View File

@ -18,6 +18,42 @@ static void* GetProcAddressCallback(const char* name)
return (void*)ctx->getProcAddress(name);
}
#ifdef WIN32
#include "YBaseLib/Windows/WindowsHeaders.h"
#endif
/// Changes the swap interval on a window. Since Qt doesn't expose this functionality, we need to change it manually
/// ourselves it by calling system-specific functions. Assumes the context is current.
static void SetSwapInterval(QWindow* window, QOpenGLContext* context, int interval)
{
static QOpenGLContext* last_context = nullptr;
#ifdef WIN32
static void(WINAPI * wgl_swap_interval_ext)(int) = nullptr;
if (last_context != context)
{
wgl_swap_interval_ext = nullptr;
last_context = context;
HMODULE gl_module = GetModuleHandleA("opengl32.dll");
if (!gl_module)
return;
const auto wgl_get_proc_address =
reinterpret_cast<PROC(WINAPI*)(LPCSTR)>(GetProcAddress(gl_module, "wglGetProcAddress"));
if (!wgl_get_proc_address)
return;
wgl_swap_interval_ext =
reinterpret_cast<decltype(wgl_swap_interval_ext)>(wgl_get_proc_address("wglSwapIntervalEXT"));
}
if (wgl_swap_interval_ext)
wgl_swap_interval_ext(interval);
#endif
}
class OpenGLHostDisplayTexture : public HostDisplayTexture
{
public:
@ -142,7 +178,7 @@ void OpenGLDisplayWindow::SetVSync(bool enabled)
GLint current_fbo = 0;
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &current_fbo);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
// SDL_GL_SetSwapInterval(enabled ? 1 : 0);
SetSwapInterval(this, m_gl_context, enabled ? 1 : 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, current_fbo);
}