VideoMode.cpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
//
// 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.
//

// Headers
#include <SFML/Window/VideoMode.hpp>
#include <SFML/Window/VideoModeSupport.hpp>
#include <algorithm>
#include <vector>
 

namespace
{
    // Global array of supported video modes
    std::vector<sf::VideoMode> SupportedModes;
 
    // Functor for sorting modes from highest to lowest
    struct CompareModes
    {
        bool operator ()(const sf::VideoMode& v1, const sf::VideoMode& v2) const
        {
            if (v1.BitsPerPixel > v2.BitsPerPixel)
                return true;
            else if (v1.BitsPerPixel < v2.BitsPerPixel)
                return false;
            else if (v1.Width > v2.Width)
                return true;
            else if (v1.Width < v2.Width)
                return false;
            else
                return (v1.Height > v2.Height);
        }
    };
}
 
 
namespace sf
{
VideoMode::VideoMode() :
Width       (0),
Height      (0),
BitsPerPixel(0)
{
 
}
 

VideoMode::VideoMode(unsigned int ModeWidth, unsigned int ModeHeight, unsigned int ModeBpp) :
Width       (ModeWidth),
Height      (ModeHeight),
BitsPerPixel(ModeBpp)
{
 
}
 

VideoMode VideoMode::GetDesktopMode()
{
    // Directly forward to the video mode support
    return priv::VideoModeSupport::GetDesktopVideoMode();
}
 

VideoMode VideoMode::GetMode(std::size_t Index)
{
    if (SupportedModes.empty())
        InitializeModes();
 
    if (Index < GetModesCount())
        return SupportedModes[Index];
    else
        return VideoMode();
}
 

std::size_t VideoMode::GetModesCount()
{
    if (SupportedModes.empty())
        InitializeModes();
 
    return SupportedModes.size();
}
 

bool VideoMode::IsValid() const
{
    if (SupportedModes.empty())
        InitializeModes();
 
    return std::find(SupportedModes.begin(), SupportedModes.end(), *this) != SupportedModes.end();
}
 

bool VideoMode::operator ==(const VideoMode& Other) const
{
    return (Width        == Other.Width)        &&
           (Height       == Other.Height)       &&
           (BitsPerPixel == Other.BitsPerPixel);
}
 

bool VideoMode::operator !=(const VideoMode& Other) const
{
    return !(*this == Other);
}
 

void VideoMode::InitializeModes()
{
    // We request the array of valid modes
    priv::VideoModeSupport::GetSupportedVideoModes(SupportedModes);
 
    // And we sort them from highest to lowest (so that number 0 is the best)
    std::sort(SupportedModes.begin(), SupportedModes.end(), CompareModes());
}
 
} // namespace sf