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.

(nia)