public string Execute(string[] args)
{
NetVips.CacheSetMax(0);
Image b;
using (var a = Image.NewFromMemory(Enumerable.Repeat((byte)255, 200).ToArray(), 20, 10, 1, "uchar"))
{
b = a / 2;
} // g_object_unref
Console.WriteLine($"Reference count b: {b.RefCount}");
var average = b.Avg();
Console.WriteLine($"Before GC: {average}");
GC.Collect();
GC.WaitForPendingFinalizers();
average = b.Avg();
Console.WriteLine($"After GC: {average}");
return("All done!");
}
public void TestMatrixinvert()
{
// matrixinvert was added in libvips 8.10.
Skip.IfNot(NetVips.AtLeastLibvips(8, 10), "requires libvips >= 8.10");
// 4x4 matrix to check if PLU decomposition works
var mat = Image.NewFromArray(new[, ]
{
{ 4, 0, 0, 0 },
{ 0, 0, 2, 0 },
{ 0, 1, 2, 0 },
{ 1, 0, 0, 1 }
});
var im = mat.Matrixinvert();
Assert.Equal(4, im.Width);
Assert.Equal(4, im.Height);
Assert.Equal(1, im.Bands);
Assert.Equal(Enums.BandFormat.Double, im.Format);
var p = im[0, 0];
Assert.Equal(0.25, p[0]);
p = im[3, 3];
Assert.Equal(1.0, p[0]);
}
public void TestSwitch()
{
// switch was added in libvips 8.9.
Skip.IfNot(NetVips.AtLeastLibvips(8, 9), "requires libvips >= 8.9");
var x = Image.Grey(256, 256, uchar: true);
// slice into two at 128, we should get 50% of pixels in each half
var index = Image.Switch(x < 128, x >= 128);
Assert.Equal(0.5, index.Avg());
// slice into four
index = Image.Switch(
x < 64,
x >= 64 && x < 128,
x >= 128 && x < 192,
x >= 192
);
Assert.Equal(1.5, index.Avg());
// no match should return n + 1
index = Image.Switch(x.Equal(1000), x.Equal(2000));
Assert.Equal(2, index.Avg());
}
public void TestCase()
{
// case was added in libvips 8.9.
Skip.IfNot(NetVips.AtLeastLibvips(8, 9), "requires libvips >= 8.9");
var x = Image.Grey(256, 256, uchar: true);
// slice into two at 128, we should get 50% of pixels in each half
var index = Image.Switch(x < 128, x >= 128);
var y = index.Case(10, 20);
Assert.Equal(15, y.Avg());
// slice into four
index = Image.Switch(
x < 64,
x >= 64 && x < 128,
x >= 128 && x < 192,
x >= 192
);
Assert.Equal(25, index.Case(10, 20, 30, 40).Avg());
// values over N should use the last value
Assert.Equal(22.5, index.Case(10, 20, 30).Avg());
}
public void TestSplit7()
{
string[] Split(string path)
{
var filename7 = NetVips.PathFilename7(path);
var mode7 = NetVips.PathMode7(path);
return(new[] { filename7, mode7 });
}
var cases = new Dictionary <string, string[]>
{
{
"c:\\silly:dir:name\\fr:ed.tif:jpeg:95,,,,c:\\icc\\srgb.icc",
new[]
{
"c:\\silly:dir:name\\fr:ed.tif",
"jpeg:95,,,,c:\\icc\\srgb.icc"
}
},
{
"I180:",
new[]
{
"I180",
""
}
},
{
"c:\\silly:",
new[]
{
"c:\\silly",
""
}
},
{
"c:\\program files\\x:hello",
new[]
{
"c:\\program files\\x",
"hello"
}
},
{
"C:\\fixtures\\2569067123_aca715a2ee_o.jpg",
new[]
{
"C:\\fixtures\\2569067123_aca715a2ee_o.jpg",
""
}
}
};
foreach (var entry in cases)
{
Assert.Equal(entry.Value, Split(entry.Key));
}
}
public GenerateImageClass()
{
if (NetVips.AtLeastLibvips(8, 9))
{
_gTypeToCSharpDict.Add(GValue.SourceType, "Source");
_gTypeToCSharpDict.Add(GValue.TargetType, "Target");
}
}
public string Execute(string[] args)
{
using var fileStream = File.OpenRead(Filename);
using var image = Image.NewFromStream(fileStream);
Parallel.For(0, 1000, new ParallelOptions {
MaxDegreeOfParallelism = NetVips.ConcurrencyGet()
},
i => RandomCrop(image, TileSize).WriteToFile($"x_{i}.png"));
return("Done!");
}
public void TestGetFields()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 5), "requires libvips >= 8.5");
var im = Image.Black(10, 10);
var fields = im.GetFields();
// we might add more fields later
Assert.True(fields.Length > 10);
Assert.Equal("width", fields[0]);
}
public GenerateImageClass()
{
// Classes
_gTypeToCSharpDict.Add(GValue.SourceType, "Source");
_gTypeToCSharpDict.Add(GValue.TargetType, "Target");
// Enums
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsAccess"), "Enums.Access");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsAlign"), "Enums.Align");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsAngle"), "Enums.Angle");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsAngle45"), "Enums.Angle45");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsBandFormat"), "Enums.BandFormat");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsBlendMode"), "Enums.BlendMode");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsCoding"), "Enums.Coding");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsCombine"), "Enums.Combine");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsCombineMode"), "Enums.CombineMode");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsCompassDirection"), "Enums.CompassDirection");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsDemandStyle"), "Enums.DemandStyle");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsDirection"), "Enums.Direction");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsExtend"), "Enums.Extend");
_gTypeToCSharpDict.Add(FailOnType, "Enums.FailOn");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignDzContainer"), "Enums.ForeignDzContainer");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignDzDepth"), "Enums.ForeignDzDepth");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignDzLayout"), "Enums.ForeignDzLayout");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignHeifCompression"), "Enums.ForeignHeifCompression");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignPpmFormat"), "Enums.ForeignPpmFormat");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignSubsample"), "Enums.ForeignSubsample");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignTiffCompression"), "Enums.ForeignTiffCompression");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignTiffPredictor"), "Enums.ForeignTiffPredictor");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignTiffResunit"), "Enums.ForeignTiffResunit");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignWebpPreset"), "Enums.ForeignWebpPreset");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsIntent"), "Enums.Intent");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsInteresting"), "Enums.Interesting");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsInterpretation"), "Enums.Interpretation");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsKernel"), "Enums.Kernel");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationBoolean"), "Enums.OperationBoolean");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationComplex"), "Enums.OperationComplex");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationComplex2"), "Enums.OperationComplex2");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationComplexget"), "Enums.OperationComplexget");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationMath"), "Enums.OperationMath");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationMath2"), "Enums.OperationMath2");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationMorphology"), "Enums.OperationMorphology");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationRelational"), "Enums.OperationRelational");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsOperationRound"), "Enums.OperationRound");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsPCS"), "Enums.PCS");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsPrecision"), "Enums.Precision");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsRegionShrink"), "Enums.RegionShrink");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsSize"), "Enums.Size");
// Flags
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignFlags"), "Enums.ForeignFlags");
_gTypeToCSharpDict.Add(NetVips.TypeFromName("VipsForeignPngFilter"), "Enums.ForeignPngFilter");
}
public void TestGetSuffixes()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 8), "requires libvips >= 8.8");
var suffixes = NetVips.GetSuffixes();
// vips supports these file types by default
// (without being dependent on external dependencies):
// - Native file format (`*.v`, `*.vips`).
// - PPM images (`*.ppm`, `*.pgm`, `*.pbm`, `*.pfm`).
// - Analyze images (`*.hdr`).
Assert.True(suffixes.Length >= 7);
}
public void TestCmyk()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 8), "requires libvips >= 8.8");
// even without lcms, we should have a working approximation
var test = Image.NewFromFile(Helper.JpegFile);
var im = test.Colourspace(Enums.Interpretation.Cmyk).Colourspace(Enums.Interpretation.Srgb);
var before = test[582, 210];
var after = im[582, 210];
Helper.AssertAlmostEqualObjects(before, after, 10);
}
public void TestFlags()
{
// the OperationFlags enum is created when the first op is made --
// make it ourselves in case we are run before that
NetVips.VipsOperationFlagsGetType();
var operationflagsGtype = NetVips.TypeFromName("VipsOperationFlags");
var gv = new GValue();
gv.SetType(operationflagsGtype);
gv.Set(12);
var value = gv.Get();
Assert.Equal(12u, value);
}
public void TestEnum()
{
// the Interpretation enum is created when the first image is made --
// make it ourselves in case we are run before the first image
NetVips.VipsInterpretationGetType();
var interpretationGtype = NetVips.TypeFromName("VipsInterpretation");
var gv = new GValue();
gv.SetType(interpretationGtype);
gv.Set("xyz");
var value = gv.Get();
Assert.Equal("xyz", value);
}
public void TestGifLoad()
{
Skip.IfNot(Helper.Have("gifload") && File.Exists(Helper.GifFile), "no gif support, skipping test");
void GifValid(Image im)
{
var a = im[10, 10];
Assert.Equal(new double[] { 33 }, a);
Assert.Equal(159, im.Width);
Assert.Equal(203, im.Height);
Assert.Equal(1, im.Bands);
}
FileLoader("gifload", Helper.GifFile, GifValid);
BufferLoader("gifload_buffer", Helper.GifFile, GifValid);
// 'n' param added in 8.5
if (NetVips.AtLeastLibvips(8, 5))
{
var x1 = Image.NewFromFile(Helper.GifAnimFile);
var x2 = Image.NewFromFile(Helper.GifAnimFile, kwargs: new VOption
{
{ "n", 2 }
});
Assert.Equal(2 * x1.Height, x2.Height);
var pageHeight = x2.Get("page-height");
Assert.Equal(x1.Height, pageHeight);
x2 = Image.NewFromFile(Helper.GifAnimFile, kwargs: new VOption
{
{ "n", -1 }
});
Assert.Equal(5 * x1.Height, x2.Height);
// delay metadata was added in libvips 8.9
if (NetVips.AtLeastLibvips(8, 9))
{
// our test gif has delay 0 for the first frame set in error
Assert.Equal(new[] { 0, 50, 50, 50, 50 }, x2.Get("delay"));
}
x2 = Image.NewFromFile(Helper.GifAnimFile, kwargs: new VOption
{
{ "page", 1 },
{ "n", -1 }
});
Assert.Equal(4 * x1.Height, x2.Height);
}
}
public void TestTanh()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 12), "requires libvips >= 8.12");
dynamic Tanh(dynamic x)
{
if (x is Image image)
{
return(image.Tanh());
}
return(Math.Tanh(x));
}
RunUnary(_allImages, Tanh, Helper.NonComplexFormats);
}
/// <summary>
/// Map a GType to the name of the C# type we use to represent it.
/// </summary>
/// <param name="name">The GType identifier.</param>
/// <param name="gtype">The GType to map.</param>
/// <returns>The C# type we use to represent it.</returns>
private string GTypeToCSharp(string name, IntPtr gtype)
{
if (_gTypeToCSharpDict.ContainsKey(gtype))
{
return(_gTypeToCSharpDict[gtype]);
}
var fundamental = NetVips.FundamentalType(gtype);
if (_gTypeToCSharpDict.ContainsKey(fundamental))
{
return(_gTypeToCSharpDict[fundamental]);
}
throw new Exception($"Unsupported type: {gtype} name: {name}");
}
/// <summary>
/// Map a GType to the name of the C# type we use to represent it.
/// </summary>
/// <param name="gtype">The GType to map.</param>
/// <returns>The C# type we use to represent it.</returns>
private string GTypeToCSharp(IntPtr gtype)
{
if (_gTypeToCSharpDict.ContainsKey(gtype))
{
return(_gTypeToCSharpDict[gtype]);
}
var fundamental = NetVips.FundamentalType(gtype);
if (_gTypeToCSharpDict.ContainsKey(fundamental))
{
return(_gTypeToCSharpDict[fundamental]);
}
return("object");
}
public void TestMagickSave()
{
Skip.IfNot(Helper.Have("magicksave"), "no magick support, skipping test");
// save to a file and load again ... we can't use SaveLoadFile since
// we want to make sure we use magickload/save
// don't use BMP - GraphicsMagick always adds an alpha
// don't use TIF - IM7 will save as 16-bit
var filename = Helper.GetTemporaryFile(_tempDir, ".jpg");
_colour.Magicksave(filename);
var x = Image.Magickload(filename);
Assert.Equal(_colour.Width, x.Width);
Assert.Equal(_colour.Height, x.Height);
Assert.Equal(_colour.Bands, x.Bands);
Assert.Equal(_colour.Height, x.Height);
var maxDiff = (_colour - x).Abs().Max();
Assert.True(maxDiff <= 60);
SaveLoadBuffer("magicksave_buffer", "magickload_buffer", _colour, 60, new VOption
{
{ "format", "JPG" }
});
// try an animation
if (Helper.Have("gifload"))
{
var x1 = Image.NewFromFile(Helper.GifAnimFile, kwargs: new VOption
{
{ "n", -1 }
});
var w1 = x1.MagicksaveBuffer(format: "GIF");
var x2 = Image.NewFromBuffer(w1, kwargs: new VOption
{
{ "n", -1 }
});
var delayName = NetVips.AtLeastLibvips(8, 9) ? "delay" : "gif-delay";
Assert.Equal(x2.Get(delayName), x1.Get(delayName));
Assert.Equal(x2.Get("page-height"), x1.Get("page-height"));
// magicks vary in how they handle this ... just pray we are close
Assert.True(Math.Abs((int)x1.Get("gif-loop") - (int)x2.Get("gif-loop")) < 5);
}
}
public void TestEnum()
{
// the Interpretation enum is created when the first image is made --
// make it ourselves in case we are run before the first image
NetVips.VipsInterpretationGetType();
var gtype = NetVips.TypeFromName("VipsInterpretation");
Enums.Interpretation actual;
using (var gv = new GValue())
{
gv.SetType(gtype);
gv.Set(Enums.Interpretation.Xyz);
actual = (Enums.Interpretation)gv.Get();
}
Assert.Equal(Enums.Interpretation.Xyz, actual);
}
public void TestFlags()
{
// the OperationFlags enum is created when the first op is made --
// make it ourselves in case we are run before that
NetVips.VipsOperationFlagsGetType();
var gtype = NetVips.TypeFromName("VipsOperationFlags");
Enums.OperationFlags actual;
using (var gv = new GValue())
{
gv.SetType(gtype);
gv.Set(Enums.OperationFlags.DEPRECATED);
actual = (Enums.OperationFlags)gv.Get();
}
Assert.Equal(Enums.OperationFlags.DEPRECATED, actual);
}
/// <summary>
/// Load from memory buffer 10000 times.
///
/// It runs in a fairly steady 60MB of ram for me. Watching the output, you see
/// stuff like:
///
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 24 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 21 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 23 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 16 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 7 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 7 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 9 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
/// 4 vips objects known to net-vips
/// memory processing <NetVips.Image 4120x2747 uchar, 3 bands, srgb>
///
/// So when around 25 vips objects are alive, the C# gc runs and they all get
/// flushed.
///
/// If you want it to run in less ram than that, you'll need to expose the GC and
/// trigger it manually every so often.
/// </summary>
/// <param name="args">Command-line arguments.</param>
/// <returns>Result.</returns>
public string Execute(string[] args)
{
NetVips.LeakSet(true);
NetVips.CacheSetMax(0);
var imageBytes = File.ReadAllBytes(Filename);
for (var i = 0; i < 10000; i++)
{
using var img = Image.NewFromBuffer(imageBytes);
Console.WriteLine($"memory processing {img}");
// uncomment this line together with the `NObjects` variable in GObject
// Console.WriteLine($"{GObject.NObjects} vips objects known to net-vips");
}
return("All done!");
}
public void TestAtan2()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 12), "requires libvips >= 8.12");
dynamic Atan2(dynamic x, dynamic y)
{
if (x is Image left)
{
return(left.Atan2(y));
}
return(Math.Atan2(x[0], y[0]) * (180.0 / Math.PI));
}
var im = (Image.Black(100, 100) + new[] { 0, 1, 2 }) / 3.0;
RunBinary(im.Bandsplit(), Atan2, Helper.NonComplexFormats);
}
public void TestAtanh()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 12), "requires libvips >= 8.12");
dynamic Atanh(dynamic x)
{
if (x is Image image)
{
return(image.Atanh());
}
return(Math.Atanh(x));
}
var im = (Image.Black(100, 100) + new[] { 0, 1, 2 }) / 3.0;
RunUnary(new[] { im }, Atanh, Helper.NonComplexFormats);
}
public string Execute(string[] args)
{
NetVips.CacheSetMax(0);
using var fileStream = File.OpenRead(Filename);
using var image = Image.NewFromStream(fileStream);
for (var i = 0; i < 1000; i++)
{
using var crop = image.Crop(0, 0, 256, 256);
var _ = crop.Avg();
Console.WriteLine($"reference count: {image.RefCount}");
// RefCount should not increase (i.e. operation should be freed)
Debug.Assert(image.RefCount == 2u);
}
var count = 0;
var locker = new object();
Parallel.For(0, 1000, new ParallelOptions {
MaxDegreeOfParallelism = NetVips.ConcurrencyGet()
},
i =>
{
Interlocked.Increment(ref count);
using var crop = image.Crop(0, 0, 256, 256);
lock (locker)
{
var _ = crop.Avg();
Console.WriteLine($"reference count: {image.RefCount} with {count} active threads");
// RefCount -1 must be lower than or equal to the number of active threads
Debug.Assert(image.RefCount - 1 <= (uint)count);
}
Interlocked.Decrement(ref count);
});
return("All done!");
}
public void TestRegion()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 8), "requires libvips >= 8.8");
var im = Image.Black(100, 100);
var region = Region.New(im);
var data = region.Fetch(0, 0, 10, 10);
Assert.Equal(10, region.Width);
Assert.Equal(10, region.Height);
Assert.True(data.Length == 100);
Assert.True(data.All(p => p == 0));
data = region.Fetch(0, 0, 20, 10);
Assert.Equal(20, region.Width);
Assert.Equal(10, region.Height);
Assert.True(data.Length == 200);
Assert.True(data.All(p => p == 0));
}
public void TestHistLocal()
{
var im = Image.NewFromFile(Helper.JpegFile);
var im2 = im.HistLocal(10, 10);
Assert.Equal(im.Width, im2.Width);
Assert.Equal(im.Height, im2.Height);
Assert.True(im.Avg() < im2.Avg());
Assert.True(im.Deviate() < im2.Deviate());
if (NetVips.AtLeastLibvips(8, 5))
{
var im3 = im.HistLocal(10, 10, maxSlope: 3);
Assert.Equal(im.Width, im3.Width);
Assert.Equal(im.Height, im3.Height);
Assert.True(im3.Deviate() < im2.Deviate());
}
}
public void TestThumbnail()
{
Skip.IfNot(NetVips.AtLeastLibvips(8, 5), "requires libvips >= 8.5");
var im = Image.Thumbnail(Helper.JpegFile, 100);
Assert.Equal(100, im.Width);
Assert.Equal(3, im.Bands);
// the average shouldn't move too much
var imOrig = Image.NewFromFile(Helper.JpegFile);
Assert.True(Math.Abs(imOrig.Avg() - im.Avg()) < 1);
// make sure we always get the right width
for (var width = 1000; width >= 1; width -= 13)
{
im = Image.Thumbnail(Helper.JpegFile, width);
Assert.Equal(width, im.Width);
}
// should fit one of width or height
im = Image.Thumbnail(Helper.JpegFile, 100, height: 300);
Assert.Equal(100, im.Width);
Assert.NotEqual(300, im.Height);
im = Image.Thumbnail(Helper.JpegFile, 300, height: 100);
Assert.NotEqual(300, im.Width);
Assert.Equal(100, im.Height);
// with @crop, should fit both width and height
im = Image.Thumbnail(Helper.JpegFile, 100, height: 300, crop: "centre");
Assert.Equal(100, im.Width);
Assert.Equal(300, im.Height);
var im1 = Image.Thumbnail(Helper.JpegFile, 100);
var buf = File.ReadAllBytes(Helper.JpegFile);
var im2 = Image.ThumbnailBuffer(buf, 100);
Assert.True(Math.Abs(im1.Avg() - im2.Avg()) < 1);
}
/// <summary>
/// Map a GType to the name of the C# type we use to represent it.
/// </summary>
/// <param name="name">The GType identifier.</param>
/// <param name="gtype">The GType to map.</param>
/// <returns>The C# type we use to represent it.</returns>
private string GTypeToCSharp(string name, IntPtr gtype)
{
if (_gTypeToCSharpDict.ContainsKey(gtype))
{
return(_gTypeToCSharpDict[gtype]);
}
var fundamental = NetVips.FundamentalType(gtype);
if (_gTypeToCSharpDict.ContainsKey(fundamental))
{
return(_gTypeToCSharpDict[fundamental]);
}
if (fundamental == GValue.GFlagsType)
{
return(name switch
{
"flags" => "Enums.ForeignFlags",
"filter" => "Enums.ForeignPngFilter",
_ => throw new Exception($"Unsupported type: {gtype} name: {name}")
});
public void TestText()
{
Skip.IfNot(Helper.Have("text"), "no text in this vips, skipping test");
var im = Image.Text("Hello, world!", dpi: 300);
Assert.True(im.Width > 10);
Assert.True(im.Height > 10);
Assert.Equal(1, im.Bands);
Assert.Equal(Enums.BandFormat.Uchar, im.Format);
Assert.Equal(255, im.Max());
Assert.Equal(0, im.Min());
if (NetVips.AtLeastLibvips(8, 9))
{
// test autofit
im = Image.Text("Hello, world!", width: 500, height: 500);
// quite a large threshold, since we need to work with a huge range of
// text rendering systems
Assert.True(Math.Abs(im.Width - 500) < 50);
}
}
public void TestOpenexrLoad()
{
Skip.IfNot(Helper.Have("openexrload") && File.Exists(Helper.ExrFile), "no openexr support, skipping test");
void ExrValid(Image im)
{
var a = im[10, 10];
Helper.AssertAlmostEqualObjects(new[]
{
0.124512,
0.159668,
0.040375,
// OpenEXR alpha is scaled to 0 - 255 in libvips 8.7+
NetVips.AtLeastLibvips(8, 7) ? 255 : 1.0
}, a, 0.00001);
Assert.Equal(610, im.Width);
Assert.Equal(406, im.Height);
Assert.Equal(4, im.Bands);
}
FileLoader("openexrload", Helper.ExrFile, ExrValid);
}
