private static void TestPngEncoderCore <TPixel>(
TestImageProvider <TPixel> provider,
PngColorType pngColorType,
PngFilterMethod pngFilterMethod,
PngBitDepth bitDepth,
PngInterlaceMode interlaceMode,
int compressionLevel = 6,
int paletteSize = 255,
bool appendPngColorType = false,
bool appendPngFilterMethod = false,
bool appendPixelType = false,
bool appendCompressionLevel = false,
bool appendPaletteSize = false,
bool appendPngBitDepth = false)
where TPixel : struct, IPixel <TPixel>
{
using (Image <TPixel> image = provider.GetImage())
{
var encoder = new PngEncoder
{
ColorType = pngColorType,
FilterMethod = pngFilterMethod,
CompressionLevel = compressionLevel,
BitDepth = bitDepth,
Quantizer = new WuQuantizer(paletteSize),
InterlaceMethod = interlaceMode
};
string pngColorTypeInfo = appendPngColorType ? pngColorType.ToString() : string.Empty;
string pngFilterMethodInfo = appendPngFilterMethod ? pngFilterMethod.ToString() : string.Empty;
string compressionLevelInfo = appendCompressionLevel ? $"_C{compressionLevel}" : string.Empty;
string paletteSizeInfo = appendPaletteSize ? $"_PaletteSize-{paletteSize}" : string.Empty;
string pngBitDepthInfo = appendPngBitDepth ? bitDepth.ToString() : string.Empty;
string pngInterlaceModeInfo = interlaceMode != PngInterlaceMode.None ? $"_{interlaceMode}" : string.Empty;
string debugInfo = $"{pngColorTypeInfo}{pngFilterMethodInfo}{compressionLevelInfo}{paletteSizeInfo}{pngBitDepthInfo}{pngInterlaceModeInfo}";
string actualOutputFile = provider.Utility.SaveTestOutputFile(image, "png", encoder, debugInfo, appendPixelType);
// Compare to the Magick reference decoder.
IImageDecoder referenceDecoder = TestEnvironment.GetReferenceDecoder(actualOutputFile);
// We compare using both our decoder and the reference decoder as pixel transformation
// occurs within the encoder itself leaving the input image unaffected.
// This means we are benefiting from testing our decoder also.
using (var imageSharpImage = Image.Load <TPixel>(actualOutputFile, new PngDecoder()))
using (var referenceImage = Image.Load <TPixel>(actualOutputFile, referenceDecoder))
{
ImageComparer.Exact.VerifySimilarity(referenceImage, imageSharpImage);
}
}
}
public PngHeader(
int width,
int height,
byte bitDepth,
PngColorType colorType,
byte compressionMethod,
byte filterMethod,
PngInterlaceMode interlaceMethod)
{
this.Width = width;
this.Height = height;
this.BitDepth = bitDepth;
this.ColorType = colorType;
this.CompressionMethod = compressionMethod;
this.FilterMethod = filterMethod;
this.InterlaceMethod = interlaceMethod;
}
