Convert EPUB to BMP | C# Examples

BMP is a bitmap format developed by Microsoft that is used to store virtually any type of bitmap data. The BMP file format supports various color depths, alpha channels, color profiles, and optional data compression, thus making it relatively versatile. With Aspose.HTML, you can convert EPUB to BMP format programmatically with full control over a wide range of conversion parameters.

In this article, you find information on how to convert EPUB to BMP using ConvertEPUB() methods of the Converter class, and how to apply ImageSaveOptions and ICreateStreamProvider parameters.

Online EPUB Converter

You can convert EPUB to other formats with Aspose.HTML for .NET API in real time. First, load an EPUB file from your local drive and then run the example. The save options in the example are set by default. You will immediately receive the conversion result as a separate file.

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If you want to convert EPUB to BMP programmatically, please see the following C# code examples.

Convert EPUB to BMP in C#

Using Converter.ConvertEPUB methods is the most common way to convert EPUB files into various formats. You should follow a few steps:

  1. Open an existing EPUB file. In the example, we use the OpenRead() method of System.IO.FileStream class to open and read an EPUB file from the file system at the specified path.
  2. Create a new ImageSaveOptions object with BMP ImageFormat. By default, the Format property is PNG.
  3. Use the ConvertEPUB() method of the Converter class to save EPUB as a BMP image. You need to pass the EPUB file stream, ImageSaveOptions, and output file path to the ConvertEPUB() method for EPUB to BMP conversion.

Please take a look over the following C# code snippet which shows the process of converting EPUB to BMP using Aspose.HTML for .NET.

using System.IO;
using Aspose.Html;
using Aspose.Html.Converters;
using Aspose.Html.Rendering.Image;
using Aspose.Html.Saving;
...
    // Open an existing EPUB file for reading
    using var stream = File.OpenRead(DataDir + "input.epub");

    // Prepare a path for converted file saving 
    string savePath = Path.Combine(OutputDir, "input-output.bmp");
    
    // Initialize ImageSaveOptions 
    var options = new ImageSaveOptions(ImageFormat.Bmp);
    
    // Call the ConvertEPUB method to convert EPUB to BMP
    Converter.ConvertEPUB(stream, options, savePath);

Save Options

Aspose.HTML allows converting EPUB to BMP using default or custom save options. ImageSaveOptions usage enables you to tune the rendering process. You can specify the page size, margins, CSS media-type, etc.

Property Description
Compression Sets Tagged Image File Format (TIFF) Compression. By default, this property is LZW.
CSS Gets a CssOptions object which is used for configuration of CSS properties processing.
Format Sets the ImageFormat (JPG, PNG, BMP, TIFF, or GIF). By default, this property is PNG.
BackgroundColor This property sets the color that will fill the background. By default, this property is Transparent.
PageSetup This property gets a page setup object and uses it for configuration output page-set.
HorizontalResolution Sets horizontal resolution for output images in pixels per inch. The default value is 300 dpi.
VerticalResolution Sets vertical resolution for output images in pixels per inch. The default value is 300 dpi.
SmoothingMode This property sets the rendering quality for this image. Available values are Invalid, Default, HighSpeed, HighQuality, None, and AntiAlias.
Text Gets a TextOptions object which is used for configuration of text rendering.

Convert EPUB to BMP using ImageSaveOptions

To convert EPUB to BMP with ImageSaveOptions specifying, you should follow a few steps:

  1. Open an existing EPUB file.
  2. Create a new ImageSaveOptions object and specify save options.
  3. Use the ConvertEPUB() method of the Converter class to save EPUB as a BMP image. You need to pass the EPUB file stream, ImageSaveOptions, and output file path to the ConvertEPUB() method to convert EPUB to BMP.

The following C# code snippet shows how to convert EPUB to BMP using custom save options:

using System.IO;
using Aspose.Html;
using Aspose.Html.Converters;
using Aspose.Html.Rendering.Image;
using Aspose.Html.Saving;
using System.Drawing;
using System.Drawing.Drawing2D;
...
    // Open an existing EPUB file for reading
    using var stream = File.OpenRead(DataDir + "input.epub");

    // Prepare a path for converted file saving 
    string savePath = Path.Combine(OutputDir, "input-options.bmp");
    
    // Initialize ImageSaveOptions 
    var options = new ImageSaveOptions(ImageFormat.Bmp)
    {
        SmoothingMode = SmoothingMode.HighQuality,
        HorizontalResolution = 400,
        VerticalResolution = 400,
        BackgroundColor = Color.AliceBlue
    };            
    
    // Call the ConvertEPUB method to convert EPUB to BMP
    Converter.ConvertEPUB(stream, options, savePath);

The ImageSaveOptions() constructor initializes an instance of the ImageSaveOptions class that is passed to ConvertEPUB() method. The ConvertEPUB() method takes the stream, options, output file path savePath and performs the conversion operation.

In the example, we use:

  • BackgroundColor property that specifies the color that the background will be filled in. The default BackgroundColor is Transparent;
  • HorizontalResolution and VerticalResolution properties that set horizontal/vertical resolution for output images in pixels per inch. By default, these properties are 300 dpi;
  • SmoothingMode property that sets the rendering quality for this image.

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