public bool Scale(ScaleType scaleType, PositionType positionType, AspectRatio aspectRatio, Vector2 padding)
{
if (!_rs232Device.Enabled)
{
return(false);
}
if (padding == null)
{
padding = new Vector2();
}
var outputEdid = GetOutputRate();
int inputWidth = (int)GetActivePixels();
int inputHeight = (int)GetActiveLines();
int inputWidthWithoutPadding = inputWidth - (int)Math.Round(padding.X * 2);
int inputHeightWithoutPadding = inputHeight - (int)Math.Round(padding.Y * 2);
if (aspectRatio != AspectRatio.RatioPreserve)
{
inputHeightWithoutPadding = (int)(inputWidthWithoutPadding * (1.0f / aspectRatio.GetRatio()));
inputHeight = (int)(inputWidth * (1.0f / aspectRatio.GetRatio()));
}
float edidRatio = (float)outputEdid.Width / (float)outputEdid.Height;
float inputRatio = (float)inputWidth / (float)inputHeight;
int vSize = 0;
int hSize = 0;
int vPos = 0;
int hPos = 0;
switch (scaleType)
{
case ScaleType.PixelPerfect:
vSize = inputHeight;
hSize = inputWidth;
break;
case ScaleType.Fit:
if (inputHeight > inputWidth) //Portrait
{
vSize = outputEdid.Height;
hSize = (int)(vSize * inputRatio);
if (hSize > outputEdid.Width)
{
float scale = (float)outputEdid.Width / (float)hSize;
hSize = (int)((float)hSize * scale);
vSize = (int)((float)vSize * scale);
}
}
else //Landscape or Square
{
hSize = outputEdid.Width;
vSize = (int)(hSize * (1 / inputRatio));
if (vSize > outputEdid.Height)
{
float scale = (float)outputEdid.Height / (float)vSize;
hSize = (int)((float)hSize * scale);
vSize = (int)((float)vSize * scale);
}
}
break;
case ScaleType.FitWidth:
{
var widthPaddingScale = (float)inputWidth / inputWidthWithoutPadding;
hSize = (int)(outputEdid.Width * (float)widthPaddingScale);
vSize = (int)(hSize * (1 / inputRatio));
}
break;
}
switch (positionType)
{
case PositionType.Centre:
hPos = ((outputEdid.Width - hSize) / 2);
vPos = ((outputEdid.Height - vSize) / 2);
break;
}
var result = SetImagePositionAndSize(new PositionAndSize(hPos, vPos, hSize, vSize));
return(result);
}