ref: 23156d38de052b1480bed45468ec019e6b5bbea8
dir: /external/glfw/src/cocoa_monitor.m/
//========================================================================
// GLFW 3.3 macOS - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================
#include "internal.h"
#include <stdlib.h>
#include <limits.h>
#include <math.h>
#include <IOKit/graphics/IOGraphicsLib.h>
#include <ApplicationServices/ApplicationServices.h>
// Get the name of the specified display, or NULL
//
static char* getDisplayName(CGDirectDisplayID displayID)
{
io_iterator_t it;
io_service_t service;
CFDictionaryRef info;
if (IOServiceGetMatchingServices(kIOMasterPortDefault,
IOServiceMatching("IODisplayConnect"),
&it) != 0)
{
// This may happen if a desktop Mac is running headless
return NULL;
}
while ((service = IOIteratorNext(it)) != 0)
{
info = IODisplayCreateInfoDictionary(service,
kIODisplayOnlyPreferredName);
CFNumberRef vendorIDRef =
CFDictionaryGetValue(info, CFSTR(kDisplayVendorID));
CFNumberRef productIDRef =
CFDictionaryGetValue(info, CFSTR(kDisplayProductID));
if (!vendorIDRef || !productIDRef)
{
CFRelease(info);
continue;
}
unsigned int vendorID, productID;
CFNumberGetValue(vendorIDRef, kCFNumberIntType, &vendorID);
CFNumberGetValue(productIDRef, kCFNumberIntType, &productID);
if (CGDisplayVendorNumber(displayID) == vendorID &&
CGDisplayModelNumber(displayID) == productID)
{
// Info dictionary is used and freed below
break;
}
CFRelease(info);
}
IOObjectRelease(it);
if (!service)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Failed to find service port for display");
return NULL;
}
CFDictionaryRef names =
CFDictionaryGetValue(info, CFSTR(kDisplayProductName));
CFStringRef nameRef;
if (!names || !CFDictionaryGetValueIfPresent(names, CFSTR("en_US"),
(const void**) &nameRef))
{
// This may happen if a desktop Mac is running headless
CFRelease(info);
return NULL;
}
const CFIndex size =
CFStringGetMaximumSizeForEncoding(CFStringGetLength(nameRef),
kCFStringEncodingUTF8);
char* name = calloc(size + 1, 1);
CFStringGetCString(nameRef, name, size, kCFStringEncodingUTF8);
CFRelease(info);
return name;
}
// Check whether the display mode should be included in enumeration
//
static GLFWbool modeIsGood(CGDisplayModeRef mode)
{
uint32_t flags = CGDisplayModeGetIOFlags(mode);
if (!(flags & kDisplayModeValidFlag) || !(flags & kDisplayModeSafeFlag))
return GLFW_FALSE;
if (flags & kDisplayModeInterlacedFlag)
return GLFW_FALSE;
if (flags & kDisplayModeStretchedFlag)
return GLFW_FALSE;
#if MAC_OS_X_VERSION_MAX_ALLOWED <= 101100
CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) &&
CFStringCompare(format, CFSTR(IO32BitDirectPixels), 0))
{
CFRelease(format);
return GLFW_FALSE;
}
CFRelease(format);
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED */
return GLFW_TRUE;
}
// Convert Core Graphics display mode to GLFW video mode
//
static GLFWvidmode vidmodeFromCGDisplayMode(CGDisplayModeRef mode,
double fallbackRefreshRate)
{
GLFWvidmode result;
result.width = (int) CGDisplayModeGetWidth(mode);
result.height = (int) CGDisplayModeGetHeight(mode);
result.refreshRate = (int) round(CGDisplayModeGetRefreshRate(mode));
if (result.refreshRate == 0)
result.refreshRate = (int) round(fallbackRefreshRate);
#if MAC_OS_X_VERSION_MAX_ALLOWED <= 101100
CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) == 0)
{
result.redBits = 5;
result.greenBits = 5;
result.blueBits = 5;
}
else
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED */
{
result.redBits = 8;
result.greenBits = 8;
result.blueBits = 8;
}
#if MAC_OS_X_VERSION_MAX_ALLOWED <= 101100
CFRelease(format);
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED */
return result;
}
// Starts reservation for display fading
//
static CGDisplayFadeReservationToken beginFadeReservation(void)
{
CGDisplayFadeReservationToken token = kCGDisplayFadeReservationInvalidToken;
if (CGAcquireDisplayFadeReservation(5, &token) == kCGErrorSuccess)
{
CGDisplayFade(token, 0.3,
kCGDisplayBlendNormal,
kCGDisplayBlendSolidColor,
0.0, 0.0, 0.0,
TRUE);
}
return token;
}
// Ends reservation for display fading
//
static void endFadeReservation(CGDisplayFadeReservationToken token)
{
if (token != kCGDisplayFadeReservationInvalidToken)
{
CGDisplayFade(token, 0.5,
kCGDisplayBlendSolidColor,
kCGDisplayBlendNormal,
0.0, 0.0, 0.0,
FALSE);
CGReleaseDisplayFadeReservation(token);
}
}
// Finds and caches the NSScreen corresponding to the specified monitor
//
static GLFWbool refreshMonitorScreen(_GLFWmonitor* monitor)
{
if (monitor->ns.screen)
return GLFW_TRUE;
for (NSScreen* screen in [NSScreen screens])
{
NSNumber* displayID = [screen deviceDescription][@"NSScreenNumber"];
// HACK: Compare unit numbers instead of display IDs to work around
// display replacement on machines with automatic graphics
// switching
if (monitor->ns.unitNumber == CGDisplayUnitNumber([displayID unsignedIntValue]))
{
monitor->ns.screen = screen;
return GLFW_TRUE;
}
}
_glfwInputError(GLFW_PLATFORM_ERROR, "Cocoa: Failed to find a screen for monitor");
return GLFW_FALSE;
}
// Returns the display refresh rate queried from the I/O registry
//
static double getFallbackRefreshRate(CGDirectDisplayID displayID)
{
double refreshRate = 60.0;
io_iterator_t it;
io_service_t service;
if (IOServiceGetMatchingServices(kIOMasterPortDefault,
IOServiceMatching("IOFramebuffer"),
&it) != 0)
{
return refreshRate;
}
while ((service = IOIteratorNext(it)) != 0)
{
const CFNumberRef indexRef =
IORegistryEntryCreateCFProperty(service,
CFSTR("IOFramebufferOpenGLIndex"),
kCFAllocatorDefault,
kNilOptions);
if (!indexRef)
continue;
uint32_t index = 0;
CFNumberGetValue(indexRef, kCFNumberIntType, &index);
CFRelease(indexRef);
if (CGOpenGLDisplayMaskToDisplayID(1 << index) != displayID)
continue;
const CFNumberRef clockRef =
IORegistryEntryCreateCFProperty(service,
CFSTR("IOFBCurrentPixelClock"),
kCFAllocatorDefault,
kNilOptions);
const CFNumberRef countRef =
IORegistryEntryCreateCFProperty(service,
CFSTR("IOFBCurrentPixelCount"),
kCFAllocatorDefault,
kNilOptions);
if (!clockRef || !countRef)
break;
uint32_t clock = 0, count = 0;
CFNumberGetValue(clockRef, kCFNumberIntType, &clock);
CFNumberGetValue(countRef, kCFNumberIntType, &count);
CFRelease(clockRef);
CFRelease(countRef);
if (clock > 0 && count > 0)
refreshRate = clock / (double) count;
break;
}
IOObjectRelease(it);
return refreshRate;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Poll for changes in the set of connected monitors
//
void _glfwPollMonitorsNS(void)
{
uint32_t displayCount;
CGGetOnlineDisplayList(0, NULL, &displayCount);
CGDirectDisplayID* displays = calloc(displayCount, sizeof(CGDirectDisplayID));
CGGetOnlineDisplayList(displayCount, displays, &displayCount);
for (int i = 0; i < _glfw.monitorCount; i++)
_glfw.monitors[i]->ns.screen = nil;
_GLFWmonitor** disconnected = NULL;
uint32_t disconnectedCount = _glfw.monitorCount;
if (disconnectedCount)
{
disconnected = calloc(_glfw.monitorCount, sizeof(_GLFWmonitor*));
memcpy(disconnected,
_glfw.monitors,
_glfw.monitorCount * sizeof(_GLFWmonitor*));
}
for (uint32_t i = 0; i < displayCount; i++)
{
if (CGDisplayIsAsleep(displays[i]))
continue;
// HACK: Compare unit numbers instead of display IDs to work around
// display replacement on machines with automatic graphics
// switching
const uint32_t unitNumber = CGDisplayUnitNumber(displays[i]);
for (uint32_t j = 0; j < disconnectedCount; j++)
{
if (disconnected[j] && disconnected[j]->ns.unitNumber == unitNumber)
{
disconnected[j] = NULL;
break;
}
}
const CGSize size = CGDisplayScreenSize(displays[i]);
char* name = getDisplayName(displays[i]);
if (!name)
name = _glfw_strdup("Unknown");
_GLFWmonitor* monitor = _glfwAllocMonitor(name, size.width, size.height);
monitor->ns.displayID = displays[i];
monitor->ns.unitNumber = unitNumber;
free(name);
CGDisplayModeRef mode = CGDisplayCopyDisplayMode(displays[i]);
if (CGDisplayModeGetRefreshRate(mode) == 0.0)
monitor->ns.fallbackRefreshRate = getFallbackRefreshRate(displays[i]);
CGDisplayModeRelease(mode);
_glfwInputMonitor(monitor, GLFW_CONNECTED, _GLFW_INSERT_LAST);
}
for (uint32_t i = 0; i < disconnectedCount; i++)
{
if (disconnected[i])
_glfwInputMonitor(disconnected[i], GLFW_DISCONNECTED, 0);
}
free(disconnected);
free(displays);
}
// Change the current video mode
//
void _glfwSetVideoModeNS(_GLFWmonitor* monitor, const GLFWvidmode* desired)
{
GLFWvidmode current;
_glfwPlatformGetVideoMode(monitor, ¤t);
const GLFWvidmode* best = _glfwChooseVideoMode(monitor, desired);
if (_glfwCompareVideoModes(¤t, best) == 0)
return;
CFArrayRef modes = CGDisplayCopyAllDisplayModes(monitor->ns.displayID, NULL);
const CFIndex count = CFArrayGetCount(modes);
CGDisplayModeRef native = NULL;
for (CFIndex i = 0; i < count; i++)
{
CGDisplayModeRef dm = (CGDisplayModeRef) CFArrayGetValueAtIndex(modes, i);
if (!modeIsGood(dm))
continue;
const GLFWvidmode mode =
vidmodeFromCGDisplayMode(dm, monitor->ns.fallbackRefreshRate);
if (_glfwCompareVideoModes(best, &mode) == 0)
{
native = dm;
break;
}
}
if (native)
{
if (monitor->ns.previousMode == NULL)
monitor->ns.previousMode = CGDisplayCopyDisplayMode(monitor->ns.displayID);
CGDisplayFadeReservationToken token = beginFadeReservation();
CGDisplaySetDisplayMode(monitor->ns.displayID, native, NULL);
endFadeReservation(token);
}
CFRelease(modes);
}
// Restore the previously saved (original) video mode
//
void _glfwRestoreVideoModeNS(_GLFWmonitor* monitor)
{
if (monitor->ns.previousMode)
{
CGDisplayFadeReservationToken token = beginFadeReservation();
CGDisplaySetDisplayMode(monitor->ns.displayID,
monitor->ns.previousMode, NULL);
endFadeReservation(token);
CGDisplayModeRelease(monitor->ns.previousMode);
monitor->ns.previousMode = NULL;
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor)
{
}
void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
{
@autoreleasepool {
const CGRect bounds = CGDisplayBounds(monitor->ns.displayID);
if (xpos)
*xpos = (int) bounds.origin.x;
if (ypos)
*ypos = (int) bounds.origin.y;
} // autoreleasepool
}
void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
float* xscale, float* yscale)
{
@autoreleasepool {
if (!refreshMonitorScreen(monitor))
return;
const NSRect points = [monitor->ns.screen frame];
const NSRect pixels = [monitor->ns.screen convertRectToBacking:points];
if (xscale)
*xscale = (float) (pixels.size.width / points.size.width);
if (yscale)
*yscale = (float) (pixels.size.height / points.size.height);
} // autoreleasepool
}
void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor,
int* xpos, int* ypos,
int* width, int* height)
{
@autoreleasepool {
if (!refreshMonitorScreen(monitor))
return;
const NSRect frameRect = [monitor->ns.screen visibleFrame];
if (xpos)
*xpos = frameRect.origin.x;
if (ypos)
*ypos = _glfwTransformYNS(frameRect.origin.y + frameRect.size.height - 1);
if (width)
*width = frameRect.size.width;
if (height)
*height = frameRect.size.height;
} // autoreleasepool
}
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
{
@autoreleasepool {
*count = 0;
CFArrayRef modes = CGDisplayCopyAllDisplayModes(monitor->ns.displayID, NULL);
const CFIndex found = CFArrayGetCount(modes);
GLFWvidmode* result = calloc(found, sizeof(GLFWvidmode));
for (CFIndex i = 0; i < found; i++)
{
CGDisplayModeRef dm = (CGDisplayModeRef) CFArrayGetValueAtIndex(modes, i);
if (!modeIsGood(dm))
continue;
const GLFWvidmode mode =
vidmodeFromCGDisplayMode(dm, monitor->ns.fallbackRefreshRate);
CFIndex j;
for (j = 0; j < *count; j++)
{
if (_glfwCompareVideoModes(result + j, &mode) == 0)
break;
}
// Skip duplicate modes
if (i < *count)
continue;
(*count)++;
result[*count - 1] = mode;
}
CFRelease(modes);
return result;
} // autoreleasepool
}
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode *mode)
{
@autoreleasepool {
CGDisplayModeRef native = CGDisplayCopyDisplayMode(monitor->ns.displayID);
*mode = vidmodeFromCGDisplayMode(native, monitor->ns.fallbackRefreshRate);
CGDisplayModeRelease(native);
} // autoreleasepool
}
GLFWbool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
{
@autoreleasepool {
uint32_t size = CGDisplayGammaTableCapacity(monitor->ns.displayID);
CGGammaValue* values = calloc(size * 3, sizeof(CGGammaValue));
CGGetDisplayTransferByTable(monitor->ns.displayID,
size,
values,
values + size,
values + size * 2,
&size);
_glfwAllocGammaArrays(ramp, size);
for (uint32_t i = 0; i < size; i++)
{
ramp->red[i] = (unsigned short) (values[i] * 65535);
ramp->green[i] = (unsigned short) (values[i + size] * 65535);
ramp->blue[i] = (unsigned short) (values[i + size * 2] * 65535);
}
free(values);
return GLFW_TRUE;
} // autoreleasepool
}
void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
{
@autoreleasepool {
CGGammaValue* values = calloc(ramp->size * 3, sizeof(CGGammaValue));
for (unsigned int i = 0; i < ramp->size; i++)
{
values[i] = ramp->red[i] / 65535.f;
values[i + ramp->size] = ramp->green[i] / 65535.f;
values[i + ramp->size * 2] = ramp->blue[i] / 65535.f;
}
CGSetDisplayTransferByTable(monitor->ns.displayID,
ramp->size,
values,
values + ramp->size,
values + ramp->size * 2);
free(values);
} // autoreleasepool
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI CGDirectDisplayID glfwGetCocoaMonitor(GLFWmonitor* handle)
{
_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(kCGNullDirectDisplay);
return monitor->ns.displayID;
}