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//========================================================================
// GLFW 3.0 OS X - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.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.
//
//========================================================================
#include "internal.h"
#include <stdlib.h>
#include <limits.h>
#include <IOKit/graphics/IOGraphicsLib.h>
// Get the name of the specified display
//
static const char* getDisplayName(CGDirectDisplayID displayID)
{
char* name;
CFDictionaryRef info, names;
CFStringRef value;
CFIndex size;
info = IODisplayCreateInfoDictionary(CGDisplayIOServicePort(displayID),
kIODisplayOnlyPreferredName);
names = CFDictionaryGetValue(info, CFSTR(kDisplayProductName));
if (!CFDictionaryGetValueIfPresent(names, CFSTR("en_US"),
(const void**) &value))
{
CFRelease(info);
return strdup("Unknown");
}
size = CFStringGetMaximumSizeForEncoding(CFStringGetLength(value),
kCFStringEncodingUTF8);
name = calloc(size + 1, sizeof(char));
CFStringGetCString(value, name, size, kCFStringEncodingUTF8);
CFRelease(info);
return name;
}
// Check whether the display mode should be included in enumeration
//
static GLboolean modeIsGood(CGDisplayModeRef mode)
{
uint32_t flags = CGDisplayModeGetIOFlags(mode);
if (!(flags & kDisplayModeValidFlag) || !(flags & kDisplayModeSafeFlag))
return GL_FALSE;
if (flags & kDisplayModeInterlacedFlag)
return GL_FALSE;
if (flags & kDisplayModeTelevisionFlag)
return GL_FALSE;
if (flags & kDisplayModeStretchedFlag)
return GL_FALSE;
CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) &&
CFStringCompare(format, CFSTR(IO32BitDirectPixels), 0))
{
CFRelease(format);
return GL_FALSE;
}
CFRelease(format);
return GL_TRUE;
}
// Convert Core Graphics display mode to GLFW video mode
//
static GLFWvidmode vidmodeFromCGDisplayMode(CGDisplayModeRef mode)
{
GLFWvidmode result;
result.width = CGDisplayModeGetWidth(mode);
result.height = CGDisplayModeGetHeight(mode);
result.refreshRate = (int) CGDisplayModeGetRefreshRate(mode);
CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) == 0)
{
result.redBits = 5;
result.greenBits = 5;
result.blueBits = 5;
}
else
{
result.redBits = 8;
result.greenBits = 8;
result.blueBits = 8;
}
CFRelease(format);
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);
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Change the current video mode
//
GLboolean _glfwSetVideoMode(_GLFWmonitor* monitor, const GLFWvidmode* desired)
{
CGDisplayModeRef bestMode = NULL;
CFArrayRef modes;
CFIndex count, i;
unsigned int sizeDiff, leastSizeDiff = UINT_MAX;
unsigned int rateDiff, leastRateDiff = UINT_MAX;
const int bpp = desired->redBits - desired->greenBits - desired->blueBits;
modes = CGDisplayCopyAllDisplayModes(monitor->ns.displayID, NULL);
count = CFArrayGetCount(modes);
for (i = 0; i < count; i++)
{
CGDisplayModeRef mode = (CGDisplayModeRef) CFArrayGetValueAtIndex(modes, i);
if (!modeIsGood(mode))
continue;
int modeBPP;
// Identify display mode pixel encoding
{
CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) == 0)
modeBPP = 16;
else
modeBPP = 32;
CFRelease(format);
}
const int modeWidth = (int) CGDisplayModeGetWidth(mode);
const int modeHeight = (int) CGDisplayModeGetHeight(mode);
const int modeRate = (int) CGDisplayModeGetRefreshRate(mode);
sizeDiff = (abs(modeBPP - bpp) << 25) |
((modeWidth - desired->width) * (modeWidth - desired->width) +
(modeHeight - desired->height) * (modeHeight - desired->height));
if (desired->refreshRate)
rateDiff = abs(modeRate - desired->refreshRate);
else
rateDiff = UINT_MAX - modeRate;
if ((sizeDiff < leastSizeDiff) ||
(sizeDiff == leastSizeDiff && rateDiff < leastRateDiff))
{
bestMode = mode;
leastSizeDiff = sizeDiff;
leastRateDiff = rateDiff;
}
}
if (!bestMode)
{
CFRelease(modes);
return GL_FALSE;
}
monitor->ns.previousMode = CGDisplayCopyDisplayMode(monitor->ns.displayID);
CGDisplayFadeReservationToken token = beginFadeReservation();
CGDisplayCapture(monitor->ns.displayID);
CGDisplaySetDisplayMode(monitor->ns.displayID, bestMode, NULL);
endFadeReservation(token);
CFRelease(modes);
return GL_TRUE;
}
// Restore the previously saved (original) video mode
//
void _glfwRestoreVideoMode(_GLFWmonitor* monitor)
{
CGDisplayFadeReservationToken token = beginFadeReservation();
CGDisplaySetDisplayMode(monitor->ns.displayID, monitor->ns.previousMode, NULL);
CGDisplayRelease(monitor->ns.displayID);
endFadeReservation(token);
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
_GLFWmonitor** _glfwPlatformGetMonitors(int* count)
{
uint32_t i, found = 0, monitorCount;
_GLFWmonitor** monitors;
CGDirectDisplayID* displays;
*count = 0;
CGGetActiveDisplayList(0, NULL, &monitorCount);
displays = calloc(monitorCount, sizeof(CGDirectDisplayID));
monitors = calloc(monitorCount, sizeof(_GLFWmonitor*));
CGGetActiveDisplayList(monitorCount, displays, &monitorCount);
for (i = 0; i < monitorCount; i++)
{
const CGSize size = CGDisplayScreenSize(displays[i]);
monitors[found] = _glfwCreateMonitor(getDisplayName(displays[i]),
size.width, size.height);
monitors[found]->ns.displayID = displays[i];
found++;
}
free(displays);
for (i = 0; i < monitorCount; i++)
{
if (CGDisplayIsMain(monitors[i]->ns.displayID))
{
_GLFWmonitor* temp = monitors[0];
monitors[0] = monitors[i];
monitors[i] = temp;
break;
}
}
NSArray* screens = [NSScreen screens];
for (i = 0; i < monitorCount; i++)
{
int j;
for (j = 0; j < [screens count]; j++)
{
NSScreen* screen = [screens objectAtIndex:j];
NSDictionary* dictionary = [screen deviceDescription];
NSNumber* number = [dictionary objectForKey:@"NSScreenNumber"];
if (monitors[i]->ns.displayID == [number unsignedIntegerValue])
{
monitors[i]->ns.screen = screen;
break;
}
}
if (monitors[i]->ns.screen == nil)
{
_glfwDestroyMonitors(monitors, monitorCount);
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Failed to find NSScreen for CGDisplay %s",
monitors[i]->name);
free(monitors);
return NULL;
}
}
*count = monitorCount;
return monitors;
}
GLboolean _glfwPlatformIsSameMonitor(_GLFWmonitor* first, _GLFWmonitor* second)
{
return first->ns.displayID == second->ns.displayID;
}
void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
{
const CGRect bounds = CGDisplayBounds(monitor->ns.displayID);
if (xpos)
*xpos = (int) bounds.origin.x;
if (ypos)
*ypos = (int) bounds.origin.y;
}
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* found)
{
CFArrayRef modes;
CFIndex count, i;
GLFWvidmode* result;
modes = CGDisplayCopyAllDisplayModes(monitor->ns.displayID, NULL);
count = CFArrayGetCount(modes);
result = calloc(count, sizeof(GLFWvidmode));
*found = 0;
for (i = 0; i < count; i++)
{
CGDisplayModeRef mode;
mode = (CGDisplayModeRef) CFArrayGetValueAtIndex(modes, i);
if (modeIsGood(mode))
{
result[*found] = vidmodeFromCGDisplayMode(mode);
(*found)++;
}
}
CFRelease(modes);
return result;
}
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode *mode)
{
CGDisplayModeRef displayMode;
displayMode = CGDisplayCopyDisplayMode(monitor->ns.displayID);
*mode = vidmodeFromCGDisplayMode(displayMode);
CGDisplayModeRelease(displayMode);
}

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