Log Message:
allegro5: update to 5.2.7

Changes from 5.2.6 to 5.2.7 (March 2021)
****************************************

The main developers this time were: SiegeLord, Peter Hull, Elias
Pschernig, Aldrik Ramaekers, Andreas Rönnquist.

Build system:

   • Allow generating projects with a suffix (lorry-lee).

   • Fix build under Clang-CL in Visual Studio.

Core:

   • Avoid some undefined behavior errors.

   • Return key modifiers in ‘ALLEGRO_EVENT_KEY_UP’ and
     ‘ALLEGRO_EVENT_KEY_DOWN’.

   • Allow calling ‘al_map_*’ color functions before Allegro is
     initialized.

   • Allow minimum bitmap size to be something other than 16 on
     non-Android platforms (controlled via ‘allegro5.cfg’).

   • Add ‘al_get_monitor_refresh_rate’ (only implemented on Windows for
     now).

Graphics:

   • Fix ‘ALLEGRO_KEEP_INDEX’ flag for bitmaps.

   • Add ‘ALLEGRO_OPENGL_CORE_PROFILE’ display flag.

Emscripten:

   • The experimental Emscripten support (via the SDL backend) is now
     documented in ‘README_sdl.txt’.

OSX:

   • Move more Cocoa operations to the main thread.

   • Explicitly link CoreVideo to fix the static build.

Windows:

   • Issue #1125: Speed up OpenGL extension detection (Tobias Scheuer).

   • Use Unicode APIs when enumerating joysticks.

   • Use ‘WM_DEVICECHANGE’ rather than polling to detect joystick
     hotlugging, reducing input drops and lags (Todd Cope).

   • Fix joystick polling period.

   • Restore WinXP compatibility by using slightly older API when
     loading shared libraries (Julian Smythe).

   • Fix build with HLSL disabled (Julian Smythe).

   • Raise DirectInput ‘MAX_JOYSTICKS’ to 32 and ‘DEVICE_BUFFER_SIZE’ to
     128.

SDL:

   • Issue #1224: Fix bug in SDL voice driver.

Audio addon:

   • Allows playing sounds in reverse by specifying a negative speed.

Acodec addon:

   • Fix edge-case looping in Ogg Vorbis stream (Cody Licorish)

Audio addon:

   • Use more sensible values for PulseAudio’s playback buffer,
     potentially resolving some crashes and high CPU usage.

Native Dialog Addon:

   • Migrate from GTK2 to GTK3.  Sadly, we lose menu icons as GTK3
     dropped support for them.

TTF addon:

   • Allow initializing TTF addon before the Font addon.

   • Shut-down the TTF addon automatically in ‘al_uninstall_system’.

PhysFS addon:

   • Fix handling of native path separators.

   • Stop using deprecated PhysFS API.

Primitives addon:

   • Fix segfault in ‘al_draw_ribbon’ when ‘num_segments > 128’ (Rodolfo
     Borges).

   • Issue 1215: Correctly handle small scales when determining
     subdivision level for high level primitives (Robin Heydon).

Documentation:

   • Fix LaTeX errors in the generation of the reference manual PDF.

   • Add links to examples into the reference manual.

   • Allow pressing ‘S’ to focus the search bar in the docs.

   • Assorted documentation improvements.

Misc:

   • Add a security policy and an associated private security mailing
     list - allegro-security@lists.liballeg.org.

   • Add Emscripten-powered examples to
     https://liballeg.org/examples_demos.html.

Examples:

   • ‘ex_audio_simple’ now displays instructions and supports
     bidirectional looping.

   • Add default files to some audio examples.