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Vadim Zeitlin c92e746f66 Fix creating wxBitmap of depth 32 but without real alpha in wxMSW 
This worked until 7e9afad53a (Add real support for monochrome bitmaps to
wxMSW, 2020-10-19) because we always created the DIB of the depth
matching the alpha presence, i.e. 32bpp only if alpha was used and 24bpp
otherwise, but since this change we can use different depths, and hence
different number of bytes per pixel, for the source and destination
pixel data and so need to account for it.

An alternative fix could be to still create 24bpp DIBs even when depth
of 32 is explicitly requested, as it was done before, but it's probably
better to respect the explicitly specified depth, even if, admittedly,
it's not really clear what, if any, effect does this have in practice.

See #22552.

Closes #22548.
2022-06-20 00:42:21 +02:00
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README.md

About

wxWidgets is a free and open source cross-platform C++ framework for writing advanced GUI applications using native controls.

wxWidgets Logo

wxWidgets allows you to write native-looking GUI applications for all the major desktop platforms and also helps with abstracting the differences in the non-GUI aspects between them. It is free for the use in both open source and commercial applications, comes with the full, easy to read and modify, source and extensive documentation and a collection of more than a hundred examples. You can learn more about wxWidgets at https://www.wxwidgets.org/ and read its documentation online at https://docs.wxwidgets.org/

Platforms

AppVeyor Unix (make) Unix (CMake) MSW (MSVC) MSW (gcc) Mac OSS-Fuzz

This version of wxWidgets supports the following primary platforms:

  • Windows XP, Vista, 7, 8, 10 and 11 (32/64 bits).
  • Most Unix variants using the GTK+ toolkit (version 2.6 or newer or 3.x).
  • macOS (10.10 or newer) using Cocoa under both amd64 and ARM platforms.

Most popular C++ compilers are supported including but not limited to:

  • Microsoft Visual C++ 2005 or later (up to 2022).
  • g++ 4 or later (up to 12), including MinGW/MinGW-64/TDM under Windows.
  • Clang (up to 14).
  • Intel icc compiler.
  • Oracle (ex-Sun) CC.

Licence

wxWidgets licence is a modified version of LGPL explicitly allowing not distributing the sources of an application using the library even in the case of static linking.

Building

For building the library, please see platform-specific documentation under docs/<port> directory, e.g. here are the instructions for wxGTK, wxMSW and wxOSX.

If you're building the sources checked out from Git, and not from a released version, please see these additional Git-specific notes.

Further information

If you are looking for community support, you can get it from

Commercial support is also available.

Finally, keep in mind that wxWidgets is an open source project collaboratively developed by its users and your contributions to it are always welcome. Please check our guidelines if you'd like to do it.

Have fun!

The wxWidgets Team.