QNX specifics

DIGI_*/QNX
GFX_*/QNX
MIDI_*/QNX
qnx_get_window

Drivers GFX_*/QNX

QNX Allegro supports the following card parameters for the set_gfx_mode() function:

GFX_TEXT
This closes any graphic mode previously opened with set_gfx_mode.
GFX_AUTODETECT
Let Allegro pick an appropriate graphics driver.
GFX_AUTODETECT_FULLSCREEN
Autodetects a graphics driver, but will only use fullscreen drivers, failing if these are not available on current platform.
GFX_AUTODETECT_WINDOWED
Same as above, but uses only windowed drivers.
GFX_SAFE
Special driver for when you want to reliably set a graphics mode and don't really care what resolution. See the set_gfx_mode() documentation for details.
GFX_PHOTON
Alias for GFX_PHOTON_ACCEL.
GFX_PHOTON_ACCEL
Fullscreen exclusive mode through Photon, running with hardware acceleration enabled.
GFX_PHOTON_SOFT
Fullscreen exclusive mode that only uses software drawing, rather than any hardware accelerated features.
GFX_PHOTON_SAFE
Simplified fullscreen exclusive driver that doesn't support any hardware acceleration, video or system bitmaps, etc.
GFX_PHOTON_WIN
The regular windowed Photon driver, running in color conversion mode when the color depth doesn't match that of the Photon desktop. Color conversion is much slower than direct drawing. Note that, mainly for performance reasons, this driver requires the width of the screen to be a multiple of 4.

See also: set_gfx_mode.

Drivers DIGI_*/QNX

The QNX sound functions support the following digital soundcards:

      DIGI_AUTODETECT      - let Allegro pick a digital sound driver
      DIGI_NONE            - no digital sound
      DIGI_ALSA            - ALSA sound driver

See also: detect_digi_driver, install_sound, install_sound_input.

Drivers MIDI_*/QNX

The QNX sound functions support the following MIDI soundcards:

      MIDI_AUTODETECT      - let Allegro pick a MIDI sound driver
      MIDI_NONE            - no MIDI sound
      MIDI_ALSA            - ALSA RawMIDI driver
      MIDI_DIGMID          - sample-based software wavetable player

The following functions provide a platform specific interface to seamlessly integrate Allegro into general purpose QNX programs. To use these routines, you must include qnxalleg.h after other Allegro headers.

See also: detect_midi_driver, install_sound, install_sound_input.

PtWidget_t qnx_get_window(void);

Retrieves a handle to the window used by Allegro. Note that Allegro uses an underlying window even though you don't set any graphics mode, unless you have installed the neutral system driver (SYSTEM_NONE).

Back to contents