GHOST_DisplayManagerCarbon.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "GHOST_DisplayManagerCarbon.h"
#include "GHOST_Debug.h"

// We do not support multiple monitors at the moment


GHOST_DisplayManagerCarbon::GHOST_DisplayManagerCarbon(void)
{
    if (::CGGetActiveDisplayList(0, NULL, &m_numDisplays) != CGDisplayNoErr)
    {
        m_numDisplays = 0;
        m_displayIDs = NULL;
    }
    if (m_numDisplays > 0)
    {
        m_displayIDs = new CGDirectDisplayID [m_numDisplays];
        GHOST_ASSERT((m_displayIDs!=NULL), "GHOST_DisplayManagerCarbon::GHOST_DisplayManagerCarbon(): memory allocation failed");
        ::CGGetActiveDisplayList(m_numDisplays, m_displayIDs, &m_numDisplays);
    }
}


GHOST_TSuccess GHOST_DisplayManagerCarbon::getNumDisplays(GHOST_TUns8& numDisplays) const
{
    numDisplays = (GHOST_TUns8) m_numDisplays;
    return GHOST_kSuccess;
}


GHOST_TSuccess GHOST_DisplayManagerCarbon::getNumDisplaySettings(GHOST_TUns8 display, GHOST_TInt32& numSettings) const
{
    GHOST_ASSERT((display==kMainDisplay), "GHOST_DisplayManagerCarbon::getNumDisplaySettings(): only main display is supported");
    
    CFArrayRef displayModes;
    displayModes = ::CGDisplayAvailableModes(m_displayIDs[display]);
    CFIndex numModes = ::CFArrayGetCount(displayModes);
    numSettings = (GHOST_TInt32)numModes;
    
    return GHOST_kSuccess;
}


GHOST_TSuccess GHOST_DisplayManagerCarbon::getDisplaySetting(GHOST_TUns8 display, GHOST_TInt32 index, GHOST_DisplaySetting& setting) const
{
    GHOST_ASSERT((display==kMainDisplay), "GHOST_DisplayManagerCarbon::getDisplaySetting(): only main display is supported");
    
    CFArrayRef displayModes;
    CGDirectDisplayID d = m_displayIDs[display];
    displayModes = ::CGDisplayAvailableModes(d);
    //CFIndex numModes = ::CFArrayGetCount(displayModes);/*unused*/
    //GHOST_TInt32 numSettings = (GHOST_TInt32)numModes; /*unused*/
    CFDictionaryRef displayModeValues = (CFDictionaryRef)::CFArrayGetValueAtIndex(displayModes, index);
            
    setting.xPixels     = getValue(displayModeValues, kCGDisplayWidth);
    setting.yPixels     = getValue(displayModeValues, kCGDisplayHeight);
    setting.bpp         = getValue(displayModeValues, kCGDisplayBitsPerPixel);
    setting.frequency   = getValue(displayModeValues, kCGDisplayRefreshRate);
            
#ifdef GHOST_DEBUG
    printf("display mode: width=%d, height=%d, bpp=%d, frequency=%d\n", setting.xPixels, setting.yPixels, setting.bpp, setting.frequency);
#endif // GHOST_DEBUG

    return GHOST_kSuccess;
}


GHOST_TSuccess GHOST_DisplayManagerCarbon::getCurrentDisplaySetting(GHOST_TUns8 display, GHOST_DisplaySetting& setting) const
{
    GHOST_ASSERT((display==kMainDisplay), "GHOST_DisplayManagerCarbon::getCurrentDisplaySetting(): only main display is supported");
        
    CFDictionaryRef displayModeValues = ::CGDisplayCurrentMode(m_displayIDs[display]);
    
    setting.xPixels     = getValue(displayModeValues, kCGDisplayWidth);
    setting.yPixels     = getValue(displayModeValues, kCGDisplayHeight);
    setting.bpp         = getValue(displayModeValues, kCGDisplayBitsPerPixel);
    setting.frequency   = getValue(displayModeValues, kCGDisplayRefreshRate);

#ifdef GHOST_DEBUG
    printf("current display mode: width=%d, height=%d, bpp=%d, frequency=%d\n", setting.xPixels, setting.yPixels, setting.bpp, setting.frequency);
#endif // GHOST_DEBUG

    return GHOST_kSuccess;
}


GHOST_TSuccess GHOST_DisplayManagerCarbon::setCurrentDisplaySetting(GHOST_TUns8 display, const GHOST_DisplaySetting& setting)
{
    GHOST_ASSERT((display==kMainDisplay), "GHOST_DisplayManagerCarbon::setCurrentDisplaySetting(): only main display is supported");

#ifdef GHOST_DEBUG
    printf("GHOST_DisplayManagerCarbon::setCurrentDisplaySetting(): requested settings:\n");
    printf("  setting.xPixels=%d\n", setting.xPixels);
    printf("  setting.yPixels=%d\n", setting.yPixels);
    printf("  setting.bpp=%d\n", setting.bpp);
    printf("  setting.frequency=%d\n", setting.frequency);
#endif // GHOST_DEBUG

    CFDictionaryRef displayModeValues = ::CGDisplayBestModeForParametersAndRefreshRate(
        m_displayIDs[display],
        (size_t)setting.bpp,
        (size_t)setting.xPixels,
        (size_t)setting.yPixels,
        (CGRefreshRate)setting.frequency,
        NULL);

#ifdef GHOST_DEBUG
    printf("GHOST_DisplayManagerCarbon::setCurrentDisplaySetting(): switching to:\n");
    printf("  setting.xPixels=%d\n", getValue(displayModeValues, kCGDisplayWidth));
    printf("  setting.yPixels=%d\n", getValue(displayModeValues, kCGDisplayHeight));
    printf("  setting.bpp=%d\n", getValue(displayModeValues, kCGDisplayBitsPerPixel));
    printf("  setting.frequency=%d\n", getValue(displayModeValues, kCGDisplayRefreshRate));
#endif // GHOST_DEBUG

    CGDisplayErr err = ::CGDisplaySwitchToMode(m_displayIDs[display], displayModeValues);
        
    return err == CGDisplayNoErr ? GHOST_kSuccess : GHOST_kFailure;
}


long GHOST_DisplayManagerCarbon::getValue(CFDictionaryRef values, CFStringRef key) const
{
    CFNumberRef numberValue = (CFNumberRef) CFDictionaryGetValue(values, key);
    
    if (!numberValue)
    {
        return -1;
    }
    
    long intValue;
    
    if (!CFNumberGetValue(numberValue, kCFNumberLongType, &intValue))
    {
        return -1;
    }
    
    return intValue;
}