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# Third-Party Licenses Used in Qt

Run `configure -help` to see any options that may be available for controlling the use of these libraries.

- dlopen() Compatibility Library for Darwin (`dlcompat`)
- FreeType 2 (`freetype`)
- The Independent JPEG Group's JPEG Software (`libjpeg`)
- PNG Reference Library (`libpng`)
- SQLite (`sqlite`)
- Wintab API (`wintab`)
- Data Compression Library (`zlib`)

## dlopen() Compatibility Library for Darwin (`dlcompat`)

Dlcompat is] a small library that emulates the dlopen() interface on top of Darwin's dyld API. -- quoted from `src/3rdparty/dlcompat/README`.

See `src/3rdparty/dlcompat/LICENSE` for license details.

## FreeType 2 (`freetype`)

The FreeType project is a team of volunteers who develop free, portable and high-quality software solutions for digital typography. We specifically target embedded systems and focus on bringing small, efficient and ubiquitous products. -- quoted from `3rdparty/freetype/docs/freetype2.html`.

See `src/3rdparty/freetype/docs/FTL.txt` and `src/3rdparty/freetype/docs/GPL.txt` for license details.

See also the files in `src/3rdparty/opentype`, which are used by FreeType.

## The Independent JPEG Group's JPEG Software (`libjpeg`)

This package contains C software to implement JPEG image compression and decompression. JPEG (pronounced "jay-peg") is a standardized compression method for full-color and gray-scale images. JPEG is intended for compressing "real-world" scenes; line drawings, cartoons and other non-realistic images are not its strong suit. JPEG is lossy, meaning that the output image is not exactly identical to the input image. -- quoted from `src/3rdparty/libjpeg/README`.

See `src/3rdparty/libjpeg/README` for license details.

## PNG Reference Library (`libpng`)

Libpng was written as a companion to the PNG specification, as a way of reducing the amount of time and effort it takes to support the PNG file format in application programs. -- quoted from `src/3rdparty/libpng/libpng.txt`.

See `src/3rdparty/libpng/LICENSE` for license details.

## SQLite (`sqlite`)

SQLite is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine. -- quoted from www.sqlite.org.

According to the comments in the source files, the code is in the public domain.

## Wintab API (`wintab`)

Wintab is a de facto API for pointing devices on Windows. The wintab code is from http://www.pointing.com/WINTAB.HTM.

See `src/3rdparty/wintab/wintab.h` for license details.

## Data Compression Library (`zlib`)

zlib is a general purpose data compression library. All the code is thread safe. The data format used by the zlib library is described by RFCs (Request for Comments) 1950 to 1952 -- quoted from `src/3rdparty/zlib/README`.

See `src/3rdparty/zlib/README` for license details.