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Sam Lantinga de2d482b3e Fixed bug 2979 - SDL_ConvertSurface does not convert color keys consistently 
Edmund Horner

When a 16-bit "565 format" surface has a colour key set, it will blit with correct transparency.  If, however, it has its colour key set then is converted to a 32-bit ARGB format surface, the colour key in the converted image will not necessarily be the same pixel value as the transparent pixels.  It may not blit correctly, because the colour key does not match the right pixels.

In my case, with an image using 0xB54A for transparency, the colour key was converted to 180,170,82; but the corresponding pixels (with the same original value) were converted to 180,169,82.  Blitting the converted image did not use transparency where expected.

I have attached a test case.  The bug has been replicated on both x86_64 Linux (SDL 2.0.2), and 32-bit MS C++ 2010 on Windows (SDL 2.0.0).
2017-08-12 16:59:00 -07:00
acinclude Fixed bug 3481 - Configure fails to detect dynamic library support on powerpc64le 2016-11-06 20:26:48 -08:00
android-project Fixed bug 3191 - haptic system on android? 2017-08-12 08:15:09 -07:00
build-scripts Disable static builds for static analysis. 2017-07-30 14:36:01 -04:00
cmake cmake: whoops, Sam and I both fixed this bug at the same time. :) 2017-08-09 22:34:45 -04:00
debian We don't actually build with the Xt library 2017-01-10 23:23:32 -08:00
docs README-linux.md: added libsndio-dev to the package list. 2017-08-07 00:36:45 -04:00
include Added a note about number key keycodes always being SDLK_0...SDLK_9 even on AZERTY layouts 2017-08-12 15:45:46 -07:00
src Fixed bug 2979 - SDL_ConvertSurface does not convert color keys consistently 2017-08-12 16:59:00 -07:00
test Fixed bug 3639 - SDL_GetPrefPath returns a path with two consecutive slashes on Unix if org is omitted 2017-08-11 11:32:00 -07:00
VisualC Updated Visual Studio 2008 project 2017-07-10 15:55:13 -07:00
VisualC-WinRT WinRT: removed Windows 8.0 from build-bot + NuGet package creation scripts 2017-02-25 21:23:12 -05:00
visualtest Updated copyright for 2017 2017-01-01 18:33:28 -08:00
Xcode Updated copyright for 2017 2017-01-01 18:33:28 -08:00
Xcode-iOS ios: Fixed math include in demos. 2017-05-25 23:01:59 +02:00
.hgignore wayland: Build own version of core protocol 2016-06-23 18:39:05 +08:00
.hgtags Added tag release-2.0.5 for changeset 007dfe83abf8 2016-10-19 21:22:42 -07:00
Android.mk Fixed bug 3191 - haptic system on android? 2017-08-12 08:15:09 -07:00
autogen.sh Don't use pushd/popd in autogen.sh; Ubuntu's /bin/sh doesn't support it. 2016-12-26 22:58:58 -05:00
BUGS.txt BUGS.txt: Changed mailing list link to discourse.libsdl.org. 2017-04-01 00:05:25 -04:00
cmake_uninstall.cmake.in Add suport for "make uninstall" to cmake. 2014-06-16 10:58:09 -03:00
CMakeLists.txt Forgot to add function check for fopen64 to CMake build 2017-08-11 21:17:10 -07:00
configure Fixed bug 3208 - Minor improvements to the configure script 2017-08-12 15:00:33 -07:00
configure.in Fixed bug 3208 - Minor improvements to the configure script 2017-08-12 15:00:33 -07:00
COPYING.txt Updated copyright for 2017 2017-01-01 18:33:28 -08:00
CREDITS.txt Added Julian Winter to the credits for the SDL 2.0 website. 2013-08-12 08:45:37 -07:00
INSTALL.txt More HTTPS doc tweaks. 2017-02-16 16:59:07 -05:00
Makefile.in Fixed bug 3208 - Minor improvements to the configure script 2017-08-12 15:00:33 -07:00
Makefile.minimal Added SDL_GetBasePath() and SDL_GetPrefPath() in new filesystem module. 2013-08-20 19:57:11 -04:00
Makefile.pandora pandora: Fixed compiler warning about redefining SDL_REVISION. 2017-06-18 23:00:27 +02:00
Makefile.psp PSP: Added missing object for generic TLS to Makefile. 2016-02-13 17:34:14 +01:00
Makefile.wiz Pandora: Updated SDL version in Makefile. 2016-07-19 21:01:30 +02:00
README-SDL.txt More HTTPS changes in the documentation. 2017-02-16 16:52:03 -05:00
README.txt readme: correct webpage URL to use HTTPS. 2017-02-16 13:30:34 -05:00
sdl2-config.cmake.in Applied Ubuntu patch bug_822210_fix_sdl2-config.cmake_whitespace.patch 2016-10-07 15:08:37 -07:00
sdl2-config.in Revert fix for bug 1392 because it breaks linking with mingw32 2013-10-21 10:28:57 -07:00
sdl2.m4 Fixed bug 3429 - Update AM_PATH_SDL2() to also check for SDL2.framework 2016-09-29 16:37:08 -07:00
sdl2.pc.in Revert fix for bug 1392 because it breaks linking with mingw32 2013-10-21 10:28:57 -07:00
SDL2.spec.in Fixed docs path in RPM .spec file. 2015-06-04 19:05:01 -04:00
SDL2Config.cmake Fixed bug 3651 - CMake build does not install CMake package configuration 2017-08-09 19:03:10 -07:00
TODO.txt Added __WINDOWS__ to reflect both 32 and 64-bit windows platforms 2013-10-20 20:41:30 -07:00
VisualC.html Fixed two typos in documentation. 2016-01-12 22:23:53 +01:00
WhatsNew.txt Added note for David Carlier's work on OpenBSD 2016-10-12 18:57:12 -07:00

README.txt 

                         Simple DirectMedia Layer

                                  (SDL)

                                Version 2.0

---
https://www.libsdl.org/

Simple DirectMedia Layer is a cross-platform development library designed
to provide low level access to audio, keyboard, mouse, joystick, and graphics
hardware via OpenGL and Direct3D. It is used by video playback software,
emulators, and popular games including Valve's award winning catalog
and many Humble Bundle games.

More extensive documentation is available in the docs directory, starting
with README.md

Enjoy!
	Sam Lantinga				(slouken@libsdl.org)