private void TestGetOrientation_VariousAPP1Location(string APP1, int expectOri)
{
string IMAGE_WITH_STRUCT_1 = SOI + APP1 + DQT + DHT + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_2 = SOI + DQT + APP1 + DHT + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_3 = SOI + DQT + DHT + APP1 + DRI + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_4 = SOI + DQT + DHT + DRI + APP1 + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_5 = SOI + DQT + DHT + DRI + SOF + APP1 + SOS + EOI;
string IMAGE_WITH_STRUCT_6 = SOI + DQT + DHT + SOF + APP1 + SOS + EOI;
string IMAGE_WITH_STRUCT_7 = SOI + APP0 + APP2 + APP1 + DQT + DHT + DRI + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_8 = SOI + APP0 + APP1 + APP2 + DQT + DHT + DRI + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_9 = SOI + APP1 + APP2 + DQT + DHT + DRI + SOF + SOS + EOI;
string IMAGE_WITH_STRUCT_10 = SOI + APP1 + SOS + EOI;
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_1)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_2)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_3)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_4)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_5)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_6)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_7)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_8)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_9)));
Assert.AreEqual(expectOri, JfifUtil.GetOrientation(
HexStringToByteArray(IMAGE_WITH_STRUCT_10)));
}
/// <summary>
/// Sets the encoded image meta data.
/// </summary>
public async Task ParseMetaDataAsync()
{
ImageFormat format = ImageFormatChecker.GetImageFormat_WrapIOException(
GetInputStream());
Format = format;
// Dimensions decoding is not yet supported for WebP since
// BitmapUtil.DecodeDimensions has a bug where it will return 100x100 for
// some WebPs even though those are not its actual dimensions.
if (!ImageFormatHelper.IsWebpFormat(Format))
{
Tuple <int, int> dimensions = await BitmapUtil
.DecodeDimensionsAsync(GetInputStream())
.ConfigureAwait(false);
if (dimensions != default(Tuple <int, int>))
{
Width = dimensions.Item1;
Height = dimensions.Item2;
// Load the rotation angle only if we have the dimensions
if (Format == ImageFormat.JPEG)
{
if (RotationAngle == UNKNOWN_ROTATION_ANGLE)
{
RotationAngle = JfifUtil.GetAutoRotateAngleFromOrientation(
JfifUtil.GetOrientation(GetInputStream()));
}
}
else
{
RotationAngle = 0;
}
}
}
}
/// <summary>
/// Gets the correction angle based on the image's orientation.
/// </summary>
/// <param name="stream">The image stream.</param>
/// <returns>The rotation angle.</returns>
private int GetRotationAngle(Stream stream)
{
return(JfifUtil.GetAutoRotateAngleFromOrientation(
JfifUtil.GetOrientation(stream)));
}
private void TestGetOrientation_WithEndian(bool littleEnd)
{
string IFD_ENTRY_1 = MakeIfdEntry(IFD_ENTRY_TAG_1, TYPE_SHORT, 1, 255, 2, littleEnd);
string IFD_ENTRY_2 = MakeIfdEntry(IFD_ENTRY_TAG_2, TYPE_SHORT, 1, 255, 2, littleEnd);
string IFD_ENTRY_3 = MakeIfdEntry(IFD_ENTRY_TAG_3, TYPE_SHORT, 1, 255, 2, littleEnd);
string TIFF_IFD_0 = MakeIfd(
new string[]
{
IFD_ENTRY_1, IFD_ENTRY_2, IFD_ENTRY_3
},
0,
littleEnd);
string TIFF_IFD_1 = MakeIfd(
new string[]
{
MakeOrientationEntry(1, littleEnd), IFD_ENTRY_1, IFD_ENTRY_2
},
0,
littleEnd);
string TIFF_IFD_3 = MakeIfd(
new string[]
{
MakeOrientationEntry(3, littleEnd), IFD_ENTRY_1, IFD_ENTRY_2
},
0,
littleEnd);
string TIFF_IFD_6A = MakeIfd(
new string[]
{
MakeOrientationEntry(6, littleEnd), IFD_ENTRY_1, IFD_ENTRY_2
},
0,
littleEnd);
string TIFF_IFD_6B = MakeIfd(
new string[]
{
IFD_ENTRY_1, MakeOrientationEntry(6, littleEnd), IFD_ENTRY_2
},
0,
littleEnd);
string TIFF_IFD_6C = MakeIfd(
new string[]
{
IFD_ENTRY_1, IFD_ENTRY_2, MakeOrientationEntry(6, littleEnd)
},
0,
littleEnd);
string TIFF_IFD_8 = MakeIfd(
new string[]
{
MakeOrientationEntry(8, littleEnd), IFD_ENTRY_1, IFD_ENTRY_2
},
0,
littleEnd);
string APP1_0 = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_0, littleEnd));
string APP1_1 = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_1, littleEnd));
string APP1_3 = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_3, littleEnd));
string APP1_6A = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_6A, littleEnd));
string APP1_6B = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_6B, littleEnd));
string APP1_6C = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_6C, littleEnd));
string APP1_8 = MakeAPP1_EXIF(MakeTiff(TIFF_IFD_8, littleEnd));
Assert.AreEqual(0, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_0))));
Assert.AreEqual(1, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_1))));
Assert.AreEqual(3, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_3))));
Assert.AreEqual(6, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_6A))));
Assert.AreEqual(6, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_6B))));
Assert.AreEqual(6, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_6C))));
Assert.AreEqual(8, JfifUtil.GetOrientation(
HexStringToByteArray(MakeTestImageWithAPP1(APP1_8))));
TestGetOrientation_VariousAPP1Location(APP1_3, 3);
}
public void TestGetOrientation_NoAPP1()
{
Assert.AreEqual(0, JfifUtil.GetOrientation(HexStringToByteArray(NO_ORI_IMAGE_1)));
Assert.AreEqual(0, JfifUtil.GetOrientation(HexStringToByteArray(NO_ORI_IMAGE_2)));
}
