mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2025-09-05 19:08:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

windows: Use wglSwapLayerBuffers if available.

Browse Source 
It apparently works better (or can work better?) on multimonitor setups
than SwapBuffers.

This should be available back to Windows 95, but just in case, it falls
back to standard SwapBuffers if not available.

Fixes #13269.
This commit is contained in:
Ryan C. Gordon
2025-07-11 12:29:12 -04:00
parent cfb8e591cb
commit f286558bae
2 changed files with 13 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/video/windows/SDL_windowsopengl.c
View File

@@ -141,6 +141,9 @@ bool WIN_GL_LoadLibrary(SDL_VideoDevice *_this, const char *path)
SDL_LoadFunction(handle, "wglMakeCurrent");
_this->gl_data->wglShareLists = (BOOL (WINAPI *)(HGLRC, HGLRC))
SDL_LoadFunction(handle, "wglShareLists");
_this->gl_data->wglSwapLayerBuffers = (BOOL (WINAPI *)(HDC, UINT))
SDL_LoadFunction(handle, "wglSwapLayerBuffers");
/* *INDENT-ON* */ // clang-format on
#if defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
@@ -886,8 +889,14 @@ bool WIN_GL_SwapWindow(SDL_VideoDevice *_this, SDL_Window *window)
{
HDC hdc = window->internal->hdc;
if (!SwapBuffers(hdc)) {
return WIN_SetError("SwapBuffers()");
if (_this->gl_data->wglSwapLayerBuffers) {
if (!_this->gl_data->wglSwapLayerBuffers(hdc, WGL_SWAP_MAIN_PLANE)) {
return WIN_SetError("wglSwapLayerBuffers()");
}
} else {
if (!SwapBuffers(hdc)) {
return WIN_SetError("SwapBuffers()");
}
}
return true;
}

2
src/video/windows/SDL_windowsopengl.h
View File

@@ -85,6 +85,8 @@ struct SDL_GLDriverData
BOOL (WINAPI *wglGetPixelFormatAttribivARB)(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
BOOL (WINAPI *wglSwapIntervalEXT)(int interval);
int (WINAPI *wglGetSwapIntervalEXT)(void);
BOOL (WINAPI *wglSwapLayerBuffers)(HDC hdc, UINT flags);
#if defined(SDL_PLATFORM_XBOXONE) || defined(SDL_PLATFORM_XBOXSERIES)
BOOL (WINAPI *wglSwapBuffers)(HDC hdc);
int (WINAPI *wglDescribePixelFormat)(HDC hdc,