GHOST_DisplayManager.cpp

Go to the documentation of this file.

/*
 * $Id: GHOST_DisplayManager.cpp 35152 2011-02-25 11:28:33Z jesterking $
 * ***** 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_DisplayManager.h"
#include "GHOST_Debug.h"


GHOST_DisplayManager::GHOST_DisplayManager(
        void)
: m_settingsInitialized(false)
{
}


GHOST_DisplayManager::~GHOST_DisplayManager(void)
{
}


GHOST_TSuccess
GHOST_DisplayManager::initialize(
        void)
{
        GHOST_TSuccess success;
        if (!m_settingsInitialized) {
                success = initializeSettings();
                m_settingsInitialized = true;
        }
        else {
                success = GHOST_kSuccess;
        }
        return success;
}


GHOST_TSuccess
GHOST_DisplayManager::getNumDisplays(
        GHOST_TUns8& /*numDisplays*/) const
{
        // Don't know if we have a display...
        return GHOST_kFailure;
}


GHOST_TSuccess
GHOST_DisplayManager::getNumDisplaySettings(
        GHOST_TUns8 display, 
        GHOST_TInt32& numSettings) const
{
        GHOST_TSuccess success;

        GHOST_ASSERT(m_settingsInitialized, "GHOST_DisplayManager::getNumDisplaySettings(): m_settingsInitialized=false");
        GHOST_TUns8 numDisplays;
        success = getNumDisplays(numDisplays);
        if (success == GHOST_kSuccess) {
                if (display < numDisplays) {
                        numSettings = m_settings[display].size();
                }
                else {
                        success = GHOST_kFailure;
                }
        }
        return success;
}


GHOST_TSuccess
GHOST_DisplayManager::getDisplaySetting(
        GHOST_TUns8 display, 
        GHOST_TInt32 index, 
        GHOST_DisplaySetting& setting) const
{
        GHOST_TSuccess success;

        GHOST_ASSERT(m_settingsInitialized, "GHOST_DisplayManager::getNumDisplaySettings(): m_settingsInitialized=false");
        GHOST_TUns8 numDisplays;
        success = getNumDisplays(numDisplays);
        if (success == GHOST_kSuccess) {
                if (display < numDisplays && ((GHOST_TUns8)index < m_settings[display].size())) {
                        setting = m_settings[display][index];
                }
                else {
                        success = GHOST_kFailure;
                }
        }
        return success;
}


GHOST_TSuccess
GHOST_DisplayManager::getCurrentDisplaySetting(
        GHOST_TUns8 /*display*/,
        GHOST_DisplaySetting& /*setting*/) const
{
        return GHOST_kFailure;
}


GHOST_TSuccess
GHOST_DisplayManager::setCurrentDisplaySetting(
        GHOST_TUns8 /*display*/,
        const GHOST_DisplaySetting& /*setting*/)
{
        return GHOST_kFailure;
}


GHOST_TSuccess
GHOST_DisplayManager::findMatch(
        GHOST_TUns8 display, 
        const GHOST_DisplaySetting& setting, 
        GHOST_DisplaySetting& match) const
{
        GHOST_TSuccess success = GHOST_kSuccess;
        GHOST_ASSERT(m_settingsInitialized, "GHOST_DisplayManager::findMatch(): m_settingsInitialized=false");

        int criteria[4] = { setting.xPixels, setting.yPixels, setting.bpp, setting.frequency };
        int capabilities[4];
        double field, score;
        double best = 1e12; // A big number
        int found = 0;

        // Look at all the display modes
        for (int i = 0; (i < (int)m_settings[display].size()); i++) {
                // Store the capabilities of the display device
                capabilities[0] = m_settings[display][i].xPixels;
                capabilities[1] = m_settings[display][i].yPixels;
                capabilities[2] = m_settings[display][i].bpp;
                capabilities[3] = m_settings[display][i].frequency;

                // Match against all the fields of the display settings
                score = 0;
                for (int j = 0; j < 4; j++) {
                        field = capabilities[j] - criteria[j];
                        score += field * field;
                }

                if (score < best) {
                        found = i;
                        best = score;
                }
        }
        
        match = m_settings[display][found];
        
        GHOST_PRINT("GHOST_DisplayManager::findMatch(): settings of match:\n");
        GHOST_PRINT("  setting.xPixels=" << match.xPixels << "\n");
        GHOST_PRINT("  setting.yPixels=" << match.yPixels << "\n");
        GHOST_PRINT("  setting.bpp=" << match.bpp << "\n");
        GHOST_PRINT("  setting.frequency=" << match.frequency << "\n");

        return success;
}


GHOST_TSuccess
GHOST_DisplayManager::initializeSettings(
        void)
{
        GHOST_TUns8 numDisplays;
        GHOST_TSuccess success = getNumDisplays(numDisplays);
        if (success == GHOST_kSuccess) {
                for (GHOST_TUns8 display = 0; (display < numDisplays) && (success == GHOST_kSuccess); display++) {
                        GHOST_DisplaySettings displaySettings;
                        m_settings.push_back(displaySettings);
                        GHOST_TInt32 numSettings;
                        success = getNumDisplaySettings(display, numSettings);
                        if (success == GHOST_kSuccess) {
                                GHOST_TInt32 index;
                                GHOST_DisplaySetting setting;
                                for (index = 0; (index < numSettings) && (success == GHOST_kSuccess); index++) {
                                        success = getDisplaySetting(display, index, setting);
                                        m_settings[display].push_back(setting);
                                }
                        }
                        else {
                                break;
                        }
                }
        }
        return success;
}