Decode Portable PixMap images in .NET8.
| Magic Number | Type | Extension | Image Type | Encoding |
|---|---|---|---|---|
| P1 | PBM | .pbm | B/W | ASCII |
| P2 | PGM | .pgm | Gray | ASCII |
| P3 | PPM | .ppm | RGB | ASCII |
| P4 | PBM | .pbm | B/W | Binary |
| P5 | PGM | .pgm | Gray | Binary |
| P6 | PPM | .ppm | RGB | Binary |
// Read pbm/pgm/ppm image
IPpmImage ppmImage = await PpmImageReader.ReadAsync(@"C:\image.ppm");
// Read raw image
IImage rawImage = await RawImageReader.ReadAsync((@"C:\image.raw", 1920, 1080, 12, 0);BenchmarkDotNet v0.13.12, Windows 11 (10.0.22621.3007/22H2/2022Update/SunValley2) AMD Ryzen 7 PRO 4750GE with Radeon Graphics, 1 CPU, 16 logical and 8 physical cores .NET SDK 8.0.200-preview.23624.5 [Host] : .NET 8.0.1 (8.0.123.58001), X64 RyuJIT AVX2 [AttachedDebugger] DefaultJob : .NET 8.0.1 (8.0.123.58001), X64 RyuJIT AVX2
| Method | Filename | Mean | Error | StdDev | Median | Gen0 | Gen1 | Gen2 | Allocated |
|---|---|---|---|---|---|---|---|---|---|
| ReadHeader | P1-200x200.pbm | 78.65 us | 0.508 us | 0.475 us | 78.45 us | 4.0283 | - | - | 7.96 KB |
| ReadImage | P1-200x200.pbm | 459.96 us | 9.005 us | 11.709 us | 455.43 us | 25.3906 | - | - | 51.87 KB |
| ReadHeader | P2-300x200.pgm | 75.32 us | 0.255 us | 0.226 us | 75.34 us | 4.0283 | - | - | 7.94 KB |
| ReadImage | P2-300x200.pgm | 1,138.71 us | 14.674 us | 13.726 us | 1,140.11 us | 35.1563 | - | - | 75.98 KB |
| ReadHeader | P3-300x300.ppm | 78.10 us | 0.712 us | 0.594 us | 78.21 us | 4.0283 | - | - | 8.13 KB |
| ReadImage | P3-300x300.ppm | 6,935.08 us | 104.674 us | 97.912 us | 6,985.39 us | 78.1250 | 78.1250 | 78.1250 | 321.88 KB |
| ReadHeader | P4-305x400.pbm | 77.23 us | 1.494 us | 1.889 us | 76.07 us | 3.7842 | - | - | 7.62 KB |
| ReadImage | P4-305x400.pbm | 216.83 us | 3.972 us | 3.521 us | 216.33 us | 38.0859 | 38.0859 | 38.0859 | 128.74 KB |
| ReadHeader | P5-300x246.pgm | 78.56 us | 1.184 us | 1.108 us | 78.68 us | 3.7842 | - | - | 7.76 KB |
| ReadImage | P5-300x246.pgm | 123.08 us | 2.279 us | 2.132 us | 122.29 us | 41.5039 | - | - | 82.11 KB |
| ReadHeader | P6-640x426.ppm | 79.81 us | 0.578 us | 0.512 us | 79.80 us | 3.7842 | - | - | 7.76 KB |
| ReadImage | P6-640x426.ppm | 537.06 us | 10.726 us | 17.624 us | 535.36 us | 249.0234 | 249.0234 | 249.0234 | 808.97 KB |