public void Encode_PreserveTrns(string imagePath, PngBitDepth pngBitDepth, PngColorType pngColorType)
{
var options = new PngEncoder();
var testFile = TestFile.Create(imagePath);
using (Image <Rgba32> input = testFile.CreateImage())
{
PngMetaData inMeta = input.MetaData.GetFormatMetaData(PngFormat.Instance);
Assert.True(inMeta.HasTrans);
using (var memStream = new MemoryStream())
{
input.Save(memStream, options);
memStream.Position = 0;
using (var output = Image.Load <Rgba32>(memStream))
{
PngMetaData outMeta = output.MetaData.GetFormatMetaData(PngFormat.Instance);
Assert.True(outMeta.HasTrans);
switch (pngColorType)
{
case PngColorType.Grayscale:
if (pngBitDepth.Equals(PngBitDepth.Bit16))
{
Assert.True(outMeta.TransparentGray16.HasValue);
Assert.Equal(inMeta.TransparentGray16, outMeta.TransparentGray16);
}
else
{
Assert.True(outMeta.TransparentGray8.HasValue);
Assert.Equal(inMeta.TransparentGray8, outMeta.TransparentGray8);
}
break;
case PngColorType.Rgb:
if (pngBitDepth.Equals(PngBitDepth.Bit16))
{
Assert.True(outMeta.TransparentRgb48.HasValue);
Assert.Equal(inMeta.TransparentRgb48, outMeta.TransparentRgb48);
}
else
{
Assert.True(outMeta.TransparentRgb24.HasValue);
Assert.Equal(inMeta.TransparentRgb24, outMeta.TransparentRgb24);
}
break;
}
}
}
}
}
public void CloneIsDeep()
{
var meta = new PngMetaData()
{
BitDepth = PngBitDepth.Bit16,
ColorType = PngColorType.GrayscaleWithAlpha,
Gamma = 2
};
var clone = (PngMetaData)meta.DeepClone();
clone.BitDepth = PngBitDepth.Bit2;
clone.ColorType = PngColorType.Palette;
clone.Gamma = 1;
Assert.False(meta.BitDepth.Equals(clone.BitDepth));
Assert.False(meta.ColorType.Equals(clone.ColorType));
Assert.False(meta.Gamma.Equals(clone.Gamma));
}
public void Encode_PreserveBits(string imagePath, PngBitDepth pngBitDepth)
{
var options = new PngEncoder();
var testFile = TestFile.Create(imagePath);
using (Image <Rgba32> input = testFile.CreateImage())
{
using (var memStream = new MemoryStream())
{
input.Save(memStream, options);
memStream.Position = 0;
using (var output = Image.Load <Rgba32>(memStream))
{
PngMetaData meta = output.MetaData.GetFormatMetaData(PngFormat.Instance);
Assert.Equal(pngBitDepth, meta.BitDepth);
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="PngMetaData"/> class.
/// </summary>
/// <param name="other">The metadata to create an instance from.</param>
private PngMetaData(PngMetaData other)
{
this.BitDepth = other.BitDepth;
this.ColorType = other.ColorType;
this.Gamma = other.Gamma;
}
