ReadingImages.md

Reading images

Read image

// Read from file.
using var imageFromFile = new MagickImage(SampleFiles.SnakewareJpg);

// Read from stream.
using var memStream = LoadMemoryStreamImage();
using var imageFromStream = new MagickImage(memStream);

// Read from byte array.
var data = LoadImageBytes();
using var imageFromBytes = new MagickImage(data);

// Read image that has no predefined dimensions.
var settings = new MagickReadSettings();
settings.Width = 800;
settings.Height = 600;
using var yellow = new MagickImage("xc:yellow", settings);

using var image = new MagickImage();
image.Read(SampleFiles.SnakewareJpg);
image.Read(data);
image.Read("xc:yellow", settings);

using var stream = LoadMemoryStreamImage();
image.Read(stream);

Read basic image information:

// Read from file
var info = new MagickImageInfo(SampleFiles.SnakewarePng);

// Read from stream
using var memStream = LoadMemoryStreamImage();
info = new MagickImageInfo(memStream);

// Read from byte array
var data = LoadImageBytes();
info = new MagickImageInfo(data);

info = new MagickImageInfo();
info.Read(SampleFiles.SnakewarePng);
using var stream = LoadMemoryStreamImage();
info.Read(stream);
info.Read(data);

Console.WriteLine(info.Width);
Console.WriteLine(info.Height);
Console.WriteLine(info.ColorSpace);
Console.WriteLine(info.Format);
if (info.Density is not null)
{
    Console.WriteLine(info.Density.X);
    Console.WriteLine(info.Density.Y);
    Console.WriteLine(info.Density.Units);
}

Read image with multiple layers/frames:

// Read from file
using var imagesFromFile = new MagickImageCollection(SampleFiles.SnakewareJpg);

// Read from stream
using var memStream = LoadMemoryStreamImage();
using var imagesFromStream = new MagickImageCollection(memStream);

// Read from byte array
var data = LoadImageBytes();
using var imagesFromByteArray = new MagickImageCollection(data);

// Read pdf with custom density.
var settings = new MagickReadSettings();
settings.Density = new Density(144);

using var pdf = new MagickImageCollection(SampleFiles.SnakewarePdf, settings);

using var images = new MagickImageCollection();
images.Read(SampleFiles.SnakewareJpg);
using var stream = LoadMemoryStreamImage();
images.Read(stream);
images.Read(data);
images.Read(SampleFiles.SnakewarePdf, settings);