public void CanGeneratePngFromCalRGBImageData()
{
var decodedBytes = ImageHelpers.LoadFileBytes("calrgb-decoded.bin");
var image = new TestPdfImage
{
ColorSpaceDetails = new CalRGBColorSpaceDetails(
whitePoint: new List <decimal> {
0.95043m, 1, 1.09m
},
blackPoint: null,
gamma: new List <decimal> {
2.2m, 2.2m, 2.2m
},
matrix: new List <decimal> {
0.41239m, 0.21264m, 0.01933m,
0.35758m, 0.71517m, 0.11919m,
0.18045m, 0.07218m, 0.9504m
}),
DecodedBytes = decodedBytes,
WidthInSamples = 153,
HeightInSamples = 83,
BitsPerComponent = 8
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("calrgb.png"), bytes));
}
public void AlternateColorSpaceDetailsIsCurrentlyUsedInPdfPigWhenGeneratingPngsFromICCBasedImageData()
{
var decodedBytes = ImageHelpers.LoadFileBytes("iccbased-decoded.bin");
var iccBasedImage = new TestPdfImage
{
ColorSpaceDetails = new ICCBasedColorSpaceDetails(
numberOfColorComponents: 3,
alternateColorSpaceDetails: DeviceRgbColorSpaceDetails.Instance,
range: new List <decimal> {
0, 1, 0, 1, 0, 1
},
metadata: null),
DecodedBytes = decodedBytes,
WidthInSamples = 1,
HeightInSamples = 1,
BitsPerComponent = 8
};
var deviceRGBImage = new TestPdfImage
{
ColorSpaceDetails = DeviceRgbColorSpaceDetails.Instance,
DecodedBytes = decodedBytes,
WidthInSamples = 1,
HeightInSamples = 1,
BitsPerComponent = 8
};
Assert.True(PngFromPdfImageFactory.TryGenerate(iccBasedImage, out var iccPngBytes));
Assert.True(PngFromPdfImageFactory.TryGenerate(deviceRGBImage, out var deviceRgbBytes));
Assert.Equal(iccPngBytes, deviceRgbBytes);
}
public void CanGeneratePngFromCcittFaxDecodedImageData()
{
var decodedBytes = ImageHelpers.LoadFileBytes("ccittfax-decoded.bin");
var image = new TestPdfImage
{
ColorSpaceDetails = IndexedColorSpaceDetails.Stencil(DeviceGrayColorSpaceDetails.Instance, new[] { 1m, 0 }),
DecodedBytes = decodedBytes,
WidthInSamples = 1800,
HeightInSamples = 3113,
BitsPerComponent = 1
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("ccittfax.png"), bytes));
}
public void CanGeneratePngFromIndexedImageData8bpc()
{
var indices = new byte[]
{
1, 0, 1,
0, 1, 0,
1, 0, 1
};
var image = new TestPdfImage
{
ColorSpaceDetails = new IndexedColorSpaceDetails(DeviceRgbColorSpaceDetails.Instance, 1, RgbPalette.SelectMany(b => b).ToArray()),
DecodedBytes = indices,
WidthInSamples = 3,
HeightInSamples = 3
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("3x3.png"), bytes));
}
public void CanGeneratePngFromDeviceGrayscaleImageData()
{
var pixels = new[]
{
GrayscaleWhite, GrayscaleBlack, GrayscaleWhite,
GrayscaleBlack, GrayscaleWhite, GrayscaleBlack,
GrayscaleWhite, GrayscaleBlack, GrayscaleWhite
};
var image = new TestPdfImage
{
ColorSpaceDetails = DeviceGrayColorSpaceDetails.Instance,
DecodedBytes = pixels,
WidthInSamples = 3,
HeightInSamples = 3
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("3x3.png"), bytes));
}
public void CanGeneratePngFromDeviceCMYKImageData()
{
var pixels = new[]
{
CmykWhite, CmykBlack, CmykWhite,
CmykBlack, CmykWhite, CmykBlack,
CmykWhite, CmykBlack, CmykWhite
};
var image = new TestPdfImage
{
ColorSpaceDetails = DeviceCmykColorSpaceDetails.Instance,
DecodedBytes = pixels.SelectMany(b => b).ToArray(),
WidthInSamples = 3,
HeightInSamples = 3
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("3x3.png"), bytes));
}
public void CanGeneratePngFromCalGrayImageData()
{
var decodedBytes = ImageHelpers.LoadFileBytes("calgray-decoded.bin", isCompressed: true);
var image = new TestPdfImage
{
ColorSpaceDetails = new CalGrayColorSpaceDetails(
whitePoint: new List <decimal> {
0.9505000114m, 1, 1.0889999866m
},
blackPoint: null,
gamma: 2.2000000477m),
DecodedBytes = decodedBytes,
WidthInSamples = 2480,
HeightInSamples = 1748,
BitsPerComponent = 8,
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("calgray.png"), bytes));
}
public void CanGeneratePngFromICCBasedImageData()
{
var decodedBytes = ImageHelpers.LoadFileBytes("iccbased-decoded.bin");
var image = new TestPdfImage
{
ColorSpaceDetails = new ICCBasedColorSpaceDetails(
numberOfColorComponents: 3,
alternateColorSpaceDetails: DeviceRgbColorSpaceDetails.Instance,
range: new List <decimal> {
0, 1, 0, 1, 0, 1
},
metadata: null),
DecodedBytes = decodedBytes,
WidthInSamples = 1,
HeightInSamples = 1,
BitsPerComponent = 8
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("iccbased.png"), bytes));
}
public void CanGeneratePngFromIndexedImageData1bpc()
{
// Indices for a 3x3 RGB image, each index is represented by a single bit
// 1, 0, 1,
// 0, 1, 0,
// 1, 0, 1
//
// A scanline must be at least one byte wide, so the remaining five bits are padding:
// Byte 0: 10100000 (bits #7 and #5 are 1)
// Byte 1: 01000000 (bit #6 is 1)
// Byte 2: 10100000 (bits #7 and #5 are 1)
// ||||||||
// Bit # : 76543210
var lines = new byte[3];
lines[0] |= (1 << 7); // Set bit #7 to 1
lines[0] |= (1 << 5); // Set bit #5 to 1
lines[1] |= (1 << 6); // Set bit #6 to 1
lines[2] |= (1 << 7); // Set bit #7 to 1
lines[2] |= (1 << 5); // Set bit #5 to 1
var colorTable = RgbPalette.SelectMany(b => b).ToArray();
var image = new TestPdfImage
{
ColorSpaceDetails = new IndexedColorSpaceDetails(DeviceRgbColorSpaceDetails.Instance, 1, colorTable),
DecodedBytes = lines,
WidthInSamples = 3,
HeightInSamples = 3,
BitsPerComponent = 1
};
Assert.True(PngFromPdfImageFactory.TryGenerate(image, out var bytes));
Assert.True(ImageHelpers.ImagesAreEqual(LoadImage("3x3.png"), bytes));
}
