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Cocoa: Only create per-monitor display link once

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From upstream: b4a8eb9b19.
This commit is contained in:
Luflosi 2020-01-02 18:05:38 +01:00
parent 003f77b257
commit e725c647ef
No known key found for this signature in database
GPG Key ID: 4E41E29EDCC345D0
2 changed files with 33 additions and 22 deletions
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54
glfw/cocoa_monitor.m
View File

@ -146,7 +146,7 @@ static bool modeIsGood(CGDisplayModeRef mode)
// Convert Core Graphics display mode to GLFW video mode
//
static GLFWvidmode vidmodeFromCGDisplayMode(CGDisplayModeRef mode,
CVDisplayLinkRef link)
double fallbackRefreshRate)
{
GLFWvidmode result;
result.width = (int) CGDisplayModeGetWidth(mode);
@ -154,11 +154,7 @@ static GLFWvidmode vidmodeFromCGDisplayMode(CGDisplayModeRef mode,
result.refreshRate = (int) round(CGDisplayModeGetRefreshRate(mode));
if (result.refreshRate == 0)
{
const CVTime time = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(link);
if (!(time.flags & kCVTimeIsIndefinite))
result.refreshRate = (int) (time.timeScale / (double) time.timeValue);
}
result.refreshRate = (int) round(fallbackRefreshRate);
#if MAC_OS_X_VERSION_MAX_ALLOWED <= 101100
CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
@ -240,6 +236,30 @@ static bool refreshMonitorScreen(_GLFWmonitor* monitor)
return false;
}
// Returns a fallback refresh rate for when Core Graphics says it is zero
//
static double getFallbackRefreshRate(_GLFWmonitor* monitor)
{
CGDisplayModeRef mode = CGDisplayCopyDisplayMode(monitor->ns.displayID);
double refreshRate = CGDisplayModeGetRefreshRate(mode);
CGDisplayModeRelease(mode);
if (refreshRate == 0.0)
{
CVDisplayLinkRef link = NULL;
CVDisplayLinkCreateWithCGDisplay(monitor->ns.displayID, &link);
const CVTime time = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(link);
if (!(time.flags & kCVTimeIsIndefinite))
refreshRate = (int) (time.timeScale / (double) time.timeValue);
CVDisplayLinkRelease(link);
}
return refreshRate;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
@ -331,6 +351,7 @@ void _glfwPollMonitorsNS(void)
_GLFWmonitor* monitor = _glfwAllocMonitor(name, (int)size.width, (int)size.height);
monitor->ns.displayID = displays[i];
monitor->ns.unitNumber = unitNumber;
monitor->ns.fallbackRefreshRate = getFallbackRefreshRate(monitor);
createDisplayLink(monitor->ns.displayID);
free(name);
@ -360,9 +381,6 @@ void _glfwSetVideoModeNS(_GLFWmonitor* monitor, const GLFWvidmode* desired)
if (_glfwCompareVideoModes(&current, best) == 0)
return;
CVDisplayLinkRef link;
CVDisplayLinkCreateWithCGDisplay(monitor->ns.displayID, &link);
CFArrayRef modes = CGDisplayCopyAllDisplayModes(monitor->ns.displayID, NULL);
const CFIndex count = CFArrayGetCount(modes);
CGDisplayModeRef native = NULL;
@ -373,7 +391,8 @@ void _glfwSetVideoModeNS(_GLFWmonitor* monitor, const GLFWvidmode* desired)
if (!modeIsGood(dm))
continue;
const GLFWvidmode mode = vidmodeFromCGDisplayMode(dm, link);
const GLFWvidmode mode =
vidmodeFromCGDisplayMode(dm, monitor->ns.fallbackRefreshRate);
if (_glfwCompareVideoModes(best, &mode) == 0)
{
native = dm;
@ -392,7 +411,6 @@ void _glfwSetVideoModeNS(_GLFWmonitor* monitor, const GLFWvidmode* desired)
}
CFRelease(modes);
CVDisplayLinkRelease(link);
}
// Restore the previously saved (original) video mode
@ -469,9 +487,6 @@ GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
{
*count = 0;
CVDisplayLinkRef link;
CVDisplayLinkCreateWithCGDisplay(monitor->ns.displayID, &link);
CFArrayRef modes = CGDisplayCopyAllDisplayModes(monitor->ns.displayID, NULL);
const CFIndex found = CFArrayGetCount(modes);
GLFWvidmode* result = calloc(found, sizeof(GLFWvidmode));
@ -482,7 +497,8 @@ GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
if (!modeIsGood(dm))
continue;
const GLFWvidmode mode = vidmodeFromCGDisplayMode(dm, link);
const GLFWvidmode mode =
vidmodeFromCGDisplayMode(dm, monitor->ns.fallbackRefreshRate);
for (CFIndex j = 0; j < *count; j++)
{
@ -499,20 +515,14 @@ GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
}
CFRelease(modes);
CVDisplayLinkRelease(link);
return result;
}
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode *mode)
{
CVDisplayLinkRef link;
CVDisplayLinkCreateWithCGDisplay(monitor->ns.displayID, &link);
CGDisplayModeRef native = CGDisplayCopyDisplayMode(monitor->ns.displayID);
*mode = vidmodeFromCGDisplayMode(native, link);
*mode = vidmodeFromCGDisplayMode(native, monitor->ns.fallbackRefreshRate);
CGDisplayModeRelease(native);
CVDisplayLinkRelease(link);
}
bool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)

1
glfw/cocoa_platform.h vendored
View File

@ -201,6 +201,7 @@ typedef struct _GLFWmonitorNS
CGDisplayModeRef previousMode;
uint32_t unitNumber;
id screen;
double fallbackRefreshRate;
} _GLFWmonitorNS;