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Bypass DwmIsCompositionEnabled checks on Win8+.

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DWM composition is always enabled on Win8+, so there's no need to call DwmIsCompositionEnabled on those platforms.
This commit is contained in:
Cliff Smolinsky 2019-03-19 09:22:59 -07:00 committed by GitHub
parent 8055dad7e4
commit 1d8424e207
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 4 deletions
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18
src/wgl_context.c
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@ -321,10 +321,15 @@ static void swapBuffersWGL(_GLFWwindow* window)
{ {
if (IsWindowsVistaOrGreater()) if (IsWindowsVistaOrGreater())
{ {
BOOL enabled; BOOL enabled = FALSE;
// DWM Composition is always enabled on Win8+
if (IsWindows8OrGreater())
enabled = TRUE;
// HACK: Use DwmFlush when desktop composition is enabled // HACK: Use DwmFlush when desktop composition is enabled
if (SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled) if (enabled ||
(SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled))
{ {
int count = abs(window->context.wgl.interval); int count = abs(window->context.wgl.interval);
while (count--) while (count--)
@ -346,11 +351,16 @@ static void swapIntervalWGL(int interval)
{ {
if (IsWindowsVistaOrGreater()) if (IsWindowsVistaOrGreater())
{ {
BOOL enabled; BOOL enabled = FALSE;
// DWM Composition is always enabled on Win8+
if (IsWindows8OrGreater())
enabled = TRUE;
// HACK: Disable WGL swap interval when desktop composition is enabled to // HACK: Disable WGL swap interval when desktop composition is enabled to
// avoid interfering with DWM vsync // avoid interfering with DWM vsync
if (SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled) if (enabled ||
(SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled))
interval = 0; interval = 0;
} }
} }