// Get scaling factor limited to available memory
private static float GetUpperScalingLimit(SizeF scaledSize, float scalingFactor)
{
// estimate required memory and use 60% as threshold value
var required = EffectGraph.GetEstimatedRequiredMemory(scaledSize);
var threshold = (EffectGraph.AvailableMemory * 100) / 60;
if (required > threshold)
{
// limit scaling factor to fit available memory
var maxPixels = EffectGraph.GetMaximumPixelCount(threshold);
var originalPixels = ((double)scaledSize.Width * scaledSize.Height) / scalingFactor;
return((float)(maxPixels / originalPixels));
}
return(scalingFactor);
}
// Once the scaled style image exceed a certain size, warn the user.
// The models are not GPU-accellerated and might be very slow to
// calculate if the image size is rather large plus a large amount
// of RAM is required
private void WarnAboutImageSize()
{
var s = trackBarSize.Value / 100.0;
var pixels = (long?)(pictureBoxStyle.Image?.Width * pictureBoxStyle.Image?.Height * s * s);
var maximum = EffectGraph.GetMaximumPixelCount((long)(EffectGraph.AvailableMemory * 0.8));
if (pixels > maximum)
{
labelStyleDimensions.ForeColor = labelSizeWarning.ForeColor;
labelStyleDimensions.Font = labelSizeWarning.Font;
labelSizeWarning.Visible = true;
panelWarning.Visible = true;
}
else
{
labelStyleDimensions.ForeColor = labelStyle.ForeColor;
labelStyleDimensions.Font = labelStyle.Font;
labelSizeWarning.Visible = false;
panelWarning.Visible = false;
}
}