#include "rm_math.h"
#include <qmath.h>

float QAspectScaleFit(QSize sourceSize, QRect destRect)
{
    QSize destSize = destRect.size();
    float scaleW = (float)destSize.width() / (float)sourceSize.width();
    float scaleH = (float)destSize.height() / (float)sourceSize.height();
    return qMin(scaleW, scaleH);
}
QRect QRectFRound(QRectF r)
{
    double xmin = floor(r.left());
    double ymin = floor(r.top());

    double width = ceil(r.width() + (r.left()-xmin));
    double height = ceil(r.height() + (r.top()-ymin));
    return QRect(xmin,ymin,width,height);
}

// Fit
QRect QRectAspectFitRect(QSize sourceSize, QRect destRect)
{
    QSize destSize = destRect.size();
    float destScale = QAspectScaleFit(sourceSize, destRect);

    float newWidth = (float)sourceSize.width() * destScale;
    float newHeight = (float)sourceSize.height() * destScale;

    float dWidth = (((float)destSize.width() - newWidth) / 2.0f);
    float dHeight = (((float)destSize.height() - newHeight) / 2.0f);

    QRect rect = QRect(dWidth + destRect.left(), dHeight + destRect.top(), newWidth, newHeight);
    return rect;
}
QRect QRectCenter(QSize sourceSize, QRect destRect)
{
    int xo = (destRect.width() - sourceSize.width()) / 2;
    int yo = (destRect.height() - sourceSize.height()) / 2;
    return QRect(destRect.left()+xo,destRect.top()+yo,sourceSize.width(),sourceSize.height());
}

QRect QRectAspectFillRect(QSize sourceSize, QRect destRect)
{
    QSize destSize = destRect.size();
    float destScale = QAspectScaleFill(sourceSize, destRect);

    float newWidth = (float)sourceSize.width() * destScale;
    float newHeight = (float)sourceSize.height() * destScale;

    float dWidth = (((float)destSize.width() - newWidth) / 2.0f);
    float dHeight = (((float)destSize.height() - newHeight) / 2.0f);

    // l,t,r,b
    QRect rect = QRect(dWidth + destRect.left(), dHeight + destRect.top(), newWidth, newHeight);
    return rect;
}
float QAspectScaleFill(QSize sourceSize, QRect destRect)
{
    QSize destSize = destRect.size();
    float scaleW = (float)destSize.width() / (float)sourceSize.width();
    float scaleH = (float)destSize.height() / (float)sourceSize.height();
    return qMax(scaleW, scaleH);
}