Supported file formats

Image formats

This section describes the image file formats supported for loading and/or saving images when the ImageFormats module (Module.ImageFormats) is enabled.

BMP file format

The BMP file format, also known as bitmap image file or device independent bitmap (DIB) file format, is a raster graphics image file format used to store bitmap digital images, independently of the display device.[1]
The BMP file format is supported for both input (loading) and output (saving), with some limitations related to compression modes.

Table 1. BMP format
Capability Load Save

Color mode

Black & white

✔

✔

Grayscale

✔

✔

Color

✔

✔

Compression

BI_RGB (no compression)

✔

✔

BI_RLE8

✘

✘

BI_RLE4

✘

✘

BI_BITFIELDS

✘

✘

BI_JPEG

✘

✘

BI_PNG

✘

✘
The BITMAPINFOHEADER structure is the currently supported format.

PNG file format

PNG (Portable Network Graphics) is a raster graphics file format that supports lossless data compression.[2]
The PNG file format is supported for both input (loading) and output (saving).

Table 2. PNG format
Color mode Load Save

Black & white

✔

✔

Grayscale

✔

✔

Color

✔

✔

JPEG file format

JPEG is a commonly used method of lossy compression for digital photography (image). The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality.[3]
The JPEG file format is supported for both input (loading) and output (saving), with some limitations related to color modes.

Table 3. JPEG format
Color mode Load Save

Grayscale

✔

✔

Color

✔

✔

TIFF file format

TIFF (Tagged Image File Format) is a file format for storing images, popular among graphic artists, the publishing industry and both amateur and professional photographers in general. The TIFF format is widely supported by image-manipulation applications, by publishing and page layout applications, by scanning, faxing, word processing, optical character recognition and other applications.[4]

Table 4. TIFF format
Capability Load Save

Color mode

Black & white

✔

✔

Grayscale

✔

✔

Color

✔

✔

Color with alpha channel

✔

✘

Compression

No compression

✔

✘

Packbits

✔

✔

CCITT T.4

✔

✔

CCITT Group 3

✔

✘

JPEG

✔

✔

LZW

✔

✘

CCITT T.6x

✘

✘

Page number

Single page

✔

✔

Multi-page

✔

✔

JPEG2000 file format

JPEG 2000 is an image compression standard and coding system. It was created by the Joint Photographic Experts Group committee in 2000 with the intention of superseding their original discrete cosine transform-based JPEG standard with a newly designed, wavelet-based method.[5]
The JPEG2000 file format is supported for output (saving) only.

JBIG2 file format

JBIG2 is an image compression standard for bi-level images. It is suitable for both lossless and lossy compression.[6]
The JBIG2 file format is supported for output (saving) only.

PDF file format

Portable Document Format (PDF) is a file format used to represent documents in a manner independent of application software, hardware, and operating systems.[7]

The PDF file format is supported for both input (loading) and output (saving). However, the output PDF file contains only images. If you want to save images and editable text, you should use the Document Output module.
Using PDF files as input is currently available via extension PdfInput of ImageFormats module.

Table 5. PDF format
Format Load Save

PDF

✔
See Loading a PDF with its content

✔
PDF-image only - PDF 1.4 version

Document formats in output

Table 6. Documents formats (created via CDocumentWriter.Save)
Output/Save format Specifications

PDF

For more details on the available options, go to PDF options.

DOCX

For more details on the available options, go to DOCX options.

XLSX

For more details on the available options, go to XLSX options.

PPTX

Image and text, similar to the ImageOverText display in PDFs.

HTML

Same options as DOCX options minus the PageLayout::Editable.

RTF

Same options as DOCX options.

TXT

Encoding option: the supported Unicode encodings are UTF-8 and UTF-16.

ODT

Same options as DOCX options.

EPUB