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ui/cocoa: Take refresh rate into account

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Retrieve the refresh rate of the display and reflect it with
dpy_set_ui_info() and update_displaychangelistener(), allowing the
guest and DisplayChangeListener to consume the information.

The information will be used as a hint how often the display should
be updated. For example, when we run 30 Hz physical display updates
it is pointless for the guest to update the screen at 60Hz
frequency, the guest can spare some work instead.

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20220702142519.12188-1-akihiko.odaki@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Akihiko Odaki 2022-07-02 23:25:19 +09:00 committed by Philippe Mathieu-Daudé
parent 713911a107
commit 52eaefd36c
2 changed files with 14 additions and 1 deletions
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3
meson.build
View file

@ -583,7 +583,8 @@ if get_option('attr').allowed()
endif
endif
cocoa = dependency('appleframeworks', modules: 'Cocoa', required: get_option('cocoa'))
cocoa = dependency('appleframeworks', modules: ['Cocoa', 'CoreVideo'],
required: get_option('cocoa'))
if cocoa.found() and get_option('sdl').enabled()
error('Cocoa and SDL cannot be enabled at the same time')
endif

12
ui/cocoa.m
View file

@ -561,8 +561,20 @@ - (void) updateUIInfoLocked
CGDirectDisplayID display = [[description objectForKey:@"NSScreenNumber"] unsignedIntValue];
NSSize screenSize = [[[self window] screen] frame].size;
CGSize screenPhysicalSize = CGDisplayScreenSize(display);
CVDisplayLinkRef displayLink;
frameSize = isFullscreen ? screenSize : [self frame].size;
if (!CVDisplayLinkCreateWithCGDisplay(display, &displayLink)) {
CVTime period = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(displayLink);
CVDisplayLinkRelease(displayLink);
if (!(period.flags & kCVTimeIsIndefinite)) {
update_displaychangelistener(&dcl,
1000 * period.timeValue / period.timeScale);
info.refresh_rate = (int64_t)1000 * period.timeScale / period.timeValue;
}
}
info.width_mm = frameSize.width / screenSize.width * screenPhysicalSize.width;
info.height_mm = frameSize.height / screenSize.height * screenPhysicalSize.height;
} else {