/// gets suitability rating for format and takes preferred format into account
public int GetFormatRating(GliFormat format, GliFormat preferredFormat)
{
var rating = GetFormatRating(format);
var preferredPixelType = preferredFormat.GetDataType();
var pixelType = format.GetDataType();
bool isSrgb = preferredPixelType == PixelDataType.Srgb;
bool hasRgb = preferredFormat.HasRgb();
if (format == preferredFormat)
{
rating += 150;
}
// keep srgb specifier
if (isSrgb == (format.GetDataType() == PixelDataType.Srgb))
{
rating += 200;
}
else
{
rating -= 200;
}
// small bonus for same datatype
if (preferredPixelType == pixelType)
{
rating += 5;
}
// small bonus for rgb match
if (hasRgb == format.HasRgb())
{
rating += 15;
}
// small bonus for high precision
if (!preferredFormat.IsLessThan8Bit() && !format.IsLessThan8Bit())
{
rating += 20;
}
// small bonus for kept compression
if (preferredFormat.IsCompressed() && format.IsCompressed())
{
rating += 10;
}
return(rating);
}
/// gets suitability rating for format and takes preferred format into account
public int GetFormatRating(GliFormat format, GliFormat preferredFormat)
{
var rating = GetFormatRating(format);
var preferredPixelType = preferredFormat.GetDataType();
var pixelType = format.GetDataType();
bool isSrgb = preferredPixelType == PixelDataType.Srgb;
bool hasRgb = preferredFormat.HasRgb();
if (format == preferredFormat)
{
rating += 150;
}
// keep srgb specifier
if (isSrgb == (pixelType == PixelDataType.Srgb))
{
rating += 200;
}
else
{
// prefer srgb formats over unorm etc. when converting from hdr to ldr
if (!preferredFormat.IsAtMost8bit() && !preferredPixelType.IsUnormed() && pixelType == PixelDataType.Srgb)
{
rating -= 50;
}
else
{
rating -= 200;
}
}
// small bonus for same datatype
if (preferredPixelType == pixelType)
{
rating += 5;
}
// small bonus for rgb match
if (hasRgb == format.HasRgb())
{
rating += 15;
}
// small bonus for high precision
if (!preferredFormat.IsLessThan8Bit() && !format.IsLessThan8Bit())
{
rating += 20;
}
// small bonus for kept compression
if (preferredFormat.IsCompressed() && format.IsCompressed())
{
rating += 10;
}
// try to keep hdr formats
if (!preferredFormat.IsAtMost8bit() && !format.IsAtMost8bit())
{
// keep unorm property
if (preferredPixelType.IsUnormed() == pixelType.IsUnormed())
{
rating += 50;
}
}
return(rating);
}
