o3de/Code/Editor/Util/PredefinedAspectRatios.cpp

/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */


#include "EditorDefs.h"

#include "PredefinedAspectRatios.h"

// Editor
#include "Settings.h"

CPredefinedAspectRatios::CPredefinedAspectRatios()
{
    m_aspectRatios.reserve(10);

    AddAspectRatio(5, 4);
    AddAspectRatio(4, 3);
    AddAspectRatio(3, 2);
    AddAspectRatio(16, 10);
    AddAspectRatio(16, 9);
    AddAspectRatio(1.85f, 1);
    AddAspectRatio(2.39f, 1);
}

CPredefinedAspectRatios::~CPredefinedAspectRatios()
{
}

void CPredefinedAspectRatios::AddAspectRatio(float x, int y)
{
    if (y == 0)
    {
        return;
    }

    SAspectRatio aspectRatio;
    aspectRatio.name = QStringLiteral("%1:%2").arg(x, 0, 'f', 2).arg(y);
    aspectRatio.value = x / y;

    m_aspectRatios.push_back(aspectRatio);
}

void CPredefinedAspectRatios::AddAspectRatio(int x, int y)
{
    if (y == 0)
    {
        return;
    }

    SAspectRatio aspectRatio;
    aspectRatio.name = QStringLiteral("%1:%2").arg(x).arg(y);
    aspectRatio.value = float( x ) / y;

    m_aspectRatios.push_back(aspectRatio);
}


float CPredefinedAspectRatios::GetCurrentValue() const
{
    return gSettings.viewports.fDefaultAspectRatio;
}

bool CPredefinedAspectRatios::IsEmpty() const
{
    return m_aspectRatios.empty();
}

size_t CPredefinedAspectRatios::GetCount() const
{
    return m_aspectRatios.size();
}


const QString& CPredefinedAspectRatios::GetName(size_t aspectRatioId) const
{
    bool validAspectRatioId = (aspectRatioId < GetCount());
    assert(validAspectRatioId);
    if (!validAspectRatioId)
    {
        static QString dummyAspectRatioName("1:1");
        return dummyAspectRatioName;
    }

    const SAspectRatio& aspectRatio = m_aspectRatios[ aspectRatioId ];

    return aspectRatio.name;
}

float CPredefinedAspectRatios::GetValue(size_t aspectRatioId) const
{
    bool validAspectRatioId = (aspectRatioId < GetCount());
    assert(validAspectRatioId);
    if (!validAspectRatioId)
    {
        return 1;
    }

    const SAspectRatio& aspectRatio = m_aspectRatios[ aspectRatioId ];

    return aspectRatio.value;
}

bool CPredefinedAspectRatios::IsCurrent(size_t aspectRatioId) const
{
    float selectedValue = GetValue(aspectRatioId);
    float currentValue = GetCurrentValue();

    const float THRESHOLD = 0.01f;

    bool valuesCloseEnough = (fabs(selectedValue - currentValue) <= THRESHOLD);

    return valuesCloseEnough;
}