Add QNX video and audio modules

CMakeLists.txt

@@ -1534,6 +1534,12 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
         file(GLOB NETBSD_AUDIO_SOURCES ${SDL3_SOURCE_DIR}/src/audio/netbsd/*.c)
         list(APPEND SOURCE_FILES ${NETBSD_AUDIO_SOURCES})
         set(HAVE_SDL_AUDIO TRUE)
+    elseif(QNX)
+        set(SDL_AUDIO_DRIVER_QNX 1)
+        file(GLOB QNX_AUDIO_SOURCES ${SDL3_SOURCE_DIR}/src/audio/qnx/*.c)
+        list(APPEND SOURCE_FILES ${QNX_AUDIO_SOURCES})
+        list(APPEND EXTRA_LIBS asound)
+        set(HAVE_SDL_AUDIO TRUE)
     endif()
     CheckOSS()
     CheckALSA()
@@ -1562,6 +1568,7 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
       set(SDL_VIDEO_VULKAN 1)
       set(HAVE_VULKAN TRUE)
     endif()
+    CheckQNXScreen()
   endif()
 
   if(UNIX)

cmake/sdlchecks.cmake

@@ -756,6 +756,22 @@ macro(CheckOpenGLES)
   endif()
 endmacro()
 
+# Requires:
+# - EGL
+macro(CheckQNXScreen)
+  if(QNX AND HAVE_OPENGL_EGL)
+    check_c_source_compiles("
+        #include <screen/screen.h>
+        int main (int argc, char** argv) { return 0; }" HAVE_QNX_SCREEN)
+    if(HAVE_QNX_SCREEN)
+      set(SDL_VIDEO_DRIVER_QNX 1)
+      file(GLOB QNX_VIDEO_SOURCES ${SDL3_SOURCE_DIR}/src/video/qnx/*.c)
+      list(APPEND SOURCE_FILES ${QNX_VIDEO_SOURCES})
+      list(APPEND EXTRA_LIBS screen EGL)
+    endif()
+  endif()
+endmacro()
+
 # Requires:
 # - nada
 # Optional:

include/build_config/SDL_build_config.h.cmake

@@ -303,6 +303,7 @@
 #cmakedefine SDL_AUDIO_DRIVER_PSP @SDL_AUDIO_DRIVER_PSP@
 #cmakedefine SDL_AUDIO_DRIVER_PS2 @SDL_AUDIO_DRIVER_PS2@
 #cmakedefine SDL_AUDIO_DRIVER_N3DS @SDL_AUDIO_DRIVER_N3DS@
+#cmakedefine SDL_AUDIO_DRIVER_QNX @SDL_AUDIO_DRIVER_QNX@
 
 /* Enable various input drivers */
 #cmakedefine SDL_INPUT_LINUXEV @SDL_INPUT_LINUXEV@
@@ -419,6 +420,7 @@
 #cmakedefine SDL_VIDEO_DRIVER_X11_XRANDR @SDL_VIDEO_DRIVER_X11_XRANDR@
 #cmakedefine SDL_VIDEO_DRIVER_X11_XSCRNSAVER @SDL_VIDEO_DRIVER_X11_XSCRNSAVER@
 #cmakedefine SDL_VIDEO_DRIVER_X11_XSHAPE @SDL_VIDEO_DRIVER_X11_XSHAPE@
+#cmakedefine SDL_VIDEO_DRIVER_QNX @SDL_VIDEO_DRIVER_QNX@
 
 #ifdef SDL_VIDEO_DRIVER_ANDROID
 #define SDL_ENABLE_SYSWM_ANDROID

src/audio/SDL_audio.c

@@ -91,6 +91,9 @@ static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_OSS
     &DSP_bootstrap,
 #endif
+#if SDL_AUDIO_DRIVER_QNX
+    &QSAAUDIO_bootstrap,
+#endif
 #if SDL_AUDIO_DRIVER_DISK
     &DISKAUDIO_bootstrap,
 #endif

src/audio/SDL_sysaudio.h

@@ -198,5 +198,6 @@ extern AudioBootStrap PSPAUDIO_bootstrap;
 extern AudioBootStrap VITAAUD_bootstrap;
 extern AudioBootStrap N3DSAUDIO_bootstrap;
 extern AudioBootStrap EMSCRIPTENAUDIO_bootstrap;
+extern AudioBootStrap QSAAUDIO_bootstrap;
 
 #endif /* SDL_sysaudio_h_ */

src/audio/qnx/SDL_qsa_audio.c

@@ -0,0 +1,682 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/*
+ * !!! FIXME: streamline this a little by removing all the
+ * !!! FIXME:  if (capture) {} else {} sections that are identical
+ * !!! FIXME:  except for one flag.
+ */
+
+/* !!! FIXME: can this target support hotplugging? */
+
+#include "../../SDL_internal.h"
+
+#if SDL_AUDIO_DRIVER_QNX
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sched.h>
+#include <sys/select.h>
+#include <sys/neutrino.h>
+#include <sys/asoundlib.h>
+
+#include "SDL3/SDL_timer.h"
+#include "SDL3/SDL_audio.h"
+#include "../../core/unix/SDL_poll.h"
+#include "../SDL_audio_c.h"
+#include "SDL_qsa_audio.h"
+
+/* default channel communication parameters */
+#define DEFAULT_CPARAMS_RATE   44100
+#define DEFAULT_CPARAMS_VOICES 1
+
+#define DEFAULT_CPARAMS_FRAG_SIZE 4096
+#define DEFAULT_CPARAMS_FRAGS_MIN 1
+#define DEFAULT_CPARAMS_FRAGS_MAX 1
+
+/* List of found devices */
+#define QSA_MAX_DEVICES       32
+#define QSA_MAX_NAME_LENGTH   81+16     /* Hardcoded in QSA, can't be changed */
+
+typedef struct _QSA_Device
+{
+    char name[QSA_MAX_NAME_LENGTH];     /* Long audio device name for SDL  */
+    int cardno;
+    int deviceno;
+} QSA_Device;
+
+QSA_Device qsa_playback_device[QSA_MAX_DEVICES];
+uint32_t qsa_playback_devices;
+
+QSA_Device qsa_capture_device[QSA_MAX_DEVICES];
+uint32_t qsa_capture_devices;
+
+static SDL_INLINE int
+QSA_SetError(const char *fn, int status)
+{
+    return SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status));
+}
+
+/* !!! FIXME: does this need to be here? Does the SDL version not work? */
+static void
+QSA_ThreadInit(_THIS)
+{
+    /* Increase default 10 priority to 25 to avoid jerky sound */
+    struct sched_param param;
+    if (SchedGet(0, 0, &param) != -1) {
+        param.sched_priority = param.sched_curpriority + 15;
+        SchedSet(0, 0, SCHED_NOCHANGE, &param);
+    }
+}
+
+/* PCM channel parameters initialize function */
+static void
+QSA_InitAudioParams(snd_pcm_channel_params_t * cpars)
+{
+    SDL_zerop(cpars);
+    cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
+    cpars->mode = SND_PCM_MODE_BLOCK;
+    cpars->start_mode = SND_PCM_START_DATA;
+    cpars->stop_mode = SND_PCM_STOP_STOP;
+    cpars->format.format = SND_PCM_SFMT_S16_LE;
+    cpars->format.interleave = 1;
+    cpars->format.rate = DEFAULT_CPARAMS_RATE;
+    cpars->format.voices = DEFAULT_CPARAMS_VOICES;
+    cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
+    cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
+    cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
+}
+
+/* This function waits until it is possible to write a full sound buffer */
+static void
+QSA_WaitDevice(_THIS)
+{
+    int result;
+
+    /* Setup timeout for playing one fragment equal to 2 seconds          */
+    /* If timeout occured than something wrong with hardware or driver    */
+    /* For example, Vortex 8820 audio driver stucks on second DAC because */
+    /* it doesn't exist !                                                 */
+    result = SDL_IOReady(this->hidden->audio_fd,
+                         this->hidden->iscapture ? SDL_IOR_READ : SDL_IOR_WRITE,
+                         2 * 1000);
+    switch (result) {
+    case -1:
+        SDL_SetError("QSA: SDL_IOReady() failed: %s", strerror(errno));
+        break;
+    case 0:
+        SDL_SetError("QSA: timeout on buffer waiting occured");
+        this->hidden->timeout_on_wait = 1;
+        break;
+    default:
+        this->hidden->timeout_on_wait = 0;
+        break;
+    }
+}
+
+static void
+QSA_PlayDevice(_THIS)
+{
+    snd_pcm_channel_status_t cstatus;
+    int written;
+    int status;
+    int towrite;
+    void *pcmbuffer;
+
+    if (!SDL_AtomicGet(&this->enabled) || !this->hidden) {
+        return;
+    }
+
+    towrite = this->spec.size;
+    pcmbuffer = this->hidden->pcm_buf;
+
+    /* Write the audio data, checking for EAGAIN (buffer full) and underrun */
+    do {
+        written =
+            snd_pcm_plugin_write(this->hidden->audio_handle, pcmbuffer,
+                                 towrite);
+        if (written != towrite) {
+            /* Check if samples playback got stuck somewhere in hardware or in */
+            /* the audio device driver */
+            if ((errno == EAGAIN) && (written == 0)) {
+                if (this->hidden->timeout_on_wait != 0) {
+                    SDL_SetError("QSA: buffer playback timeout");
+                    return;
+                }
+            }
+
+            /* Check for errors or conditions */
+            if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
+                /* Let a little CPU time go by and try to write again */
+                SDL_Delay(1);
+
+                /* if we wrote some data */
+                towrite -= written;
+                pcmbuffer += written * this->spec.channels;
+                continue;
+            } else {
+                if ((errno == EINVAL) || (errno == EIO)) {
+                    SDL_zero(cstatus);
+                    if (!this->hidden->iscapture) {
+                        cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
+                    } else {
+                        cstatus.channel = SND_PCM_CHANNEL_CAPTURE;
+                    }
+
+                    status =
+                        snd_pcm_plugin_status(this->hidden->audio_handle,
+                                              &cstatus);
+                    if (status < 0) {
+                        QSA_SetError("snd_pcm_plugin_status", status);
+                        return;
+                    }
+
+                    if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) ||
+                        (cstatus.status == SND_PCM_STATUS_READY)) {
+                        if (!this->hidden->iscapture) {
+                            status =
+                                snd_pcm_plugin_prepare(this->hidden->
+                                                       audio_handle,
+                                                       SND_PCM_CHANNEL_PLAYBACK);
+                        } else {
+                            status =
+                                snd_pcm_plugin_prepare(this->hidden->
+                                                       audio_handle,
+                                                       SND_PCM_CHANNEL_CAPTURE);
+                        }
+                        if (status < 0) {
+                            QSA_SetError("snd_pcm_plugin_prepare", status);
+                            return;
+                        }
+                    }
+                    continue;
+                } else {
+                    return;
+                }
+            }
+        } else {
+            /* we wrote all remaining data */
+            towrite -= written;
+            pcmbuffer += written * this->spec.channels;
+        }
+    } while ((towrite > 0) && SDL_AtomicGet(&this->enabled));
+
+    /* If we couldn't write, assume fatal error for now */
+    if (towrite != 0) {
+        SDL_OpenedAudioDeviceDisconnected(this);
+    }
+}
+
+static Uint8 *
+QSA_GetDeviceBuf(_THIS)
+{
+    return this->hidden->pcm_buf;
+}
+
+static void
+QSA_CloseDevice(_THIS)
+{
+    if (this->hidden->audio_handle != NULL) {
+#if _NTO_VERSION < 710
+        if (!this->hidden->iscapture) {
+            /* Finish playing available samples */
+            snd_pcm_plugin_flush(this->hidden->audio_handle,
+                                 SND_PCM_CHANNEL_PLAYBACK);
+        } else {
+            /* Cancel unread samples during capture */
+            snd_pcm_plugin_flush(this->hidden->audio_handle,
+                                 SND_PCM_CHANNEL_CAPTURE);
+        }
+#endif
+        snd_pcm_close(this->hidden->audio_handle);
+    }
+
+    SDL_free(this->hidden->pcm_buf);
+    SDL_free(this->hidden);
+}
+
+static int
+QSA_OpenDevice(_THIS, const char *devname)
+{
+#if 0
+    /* !!! FIXME: SDL2 used to pass this handle. What's the alternative? */
+    const QSA_Device *device = (const QSA_Device *) handle;
+#else
+    const QSA_Device *device = NULL;
+#endif
+    int status = 0;
+    int format = 0;
+    SDL_AudioFormat test_format = 0;
+    int found = 0;
+    snd_pcm_channel_setup_t csetup;
+    snd_pcm_channel_params_t cparams;
+    SDL_bool iscapture = this->iscapture;
+
+    /* Initialize all variables that we clean on shutdown */
+    this->hidden =
+        (struct SDL_PrivateAudioData *) SDL_calloc(1,
+                                                   (sizeof
+                                                    (struct
+                                                     SDL_PrivateAudioData)));
+    if (this->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    /* Initialize channel transfer parameters to default */
+    QSA_InitAudioParams(&cparams);
+
+    /* Initialize channel direction: capture or playback */
+    this->hidden->iscapture = iscapture ? SDL_TRUE : SDL_FALSE;
+
+    if (device != NULL) {
+        /* Open requested audio device */
+        this->hidden->deviceno = device->deviceno;
+        this->hidden->cardno = device->cardno;
+        status = snd_pcm_open(&this->hidden->audio_handle,
+                              device->cardno, device->deviceno,
+                              iscapture ? SND_PCM_OPEN_CAPTURE : SND_PCM_OPEN_PLAYBACK);
+    } else {
+        /* Open system default audio device */
+        status = snd_pcm_open_preferred(&this->hidden->audio_handle,
+                                        &this->hidden->cardno,
+                                        &this->hidden->deviceno,
+                                        iscapture ? SND_PCM_OPEN_CAPTURE : SND_PCM_OPEN_PLAYBACK);
+    }
+
+    /* Check if requested device is opened */
+    if (status < 0) {
+        this->hidden->audio_handle = NULL;
+        return QSA_SetError("snd_pcm_open", status);
+    }
+
+    /* Try for a closest match on audio format */
+    format = 0;
+    /* can't use format as SND_PCM_SFMT_U8 = 0 in qsa */
+    found = 0;
+
+    for (test_format = SDL_FirstAudioFormat(this->spec.format); !found;) {
+        /* if match found set format to equivalent QSA format */
+        switch (test_format) {
+        case AUDIO_U8:
+            {
+                format = SND_PCM_SFMT_U8;
+                found = 1;
+            }
+            break;
+        case AUDIO_S8:
+            {
+                format = SND_PCM_SFMT_S8;
+                found = 1;
+            }
+            break;
+        case AUDIO_S16LSB:
+            {
+                format = SND_PCM_SFMT_S16_LE;
+                found = 1;
+            }
+            break;
+        case AUDIO_S16MSB:
+            {
+                format = SND_PCM_SFMT_S16_BE;
+                found = 1;
+            }
+            break;
+        case AUDIO_U16LSB:
+            {
+                format = SND_PCM_SFMT_U16_LE;
+                found = 1;
+            }
+            break;
+        case AUDIO_U16MSB:
+            {
+                format = SND_PCM_SFMT_U16_BE;
+                found = 1;
+            }
+            break;
+        case AUDIO_S32LSB:
+            {
+                format = SND_PCM_SFMT_S32_LE;
+                found = 1;
+            }
+            break;
+        case AUDIO_S32MSB:
+            {
+                format = SND_PCM_SFMT_S32_BE;
+                found = 1;
+            }
+            break;
+        case AUDIO_F32LSB:
+            {
+                format = SND_PCM_SFMT_FLOAT_LE;
+                found = 1;
+            }
+            break;
+        case AUDIO_F32MSB:
+            {
+                format = SND_PCM_SFMT_FLOAT_BE;
+                found = 1;
+            }
+            break;
+        default:
+            {
+                break;
+            }
+        }
+
+        if (!found) {
+            test_format = SDL_NextAudioFormat();
+        }
+    }
+
+    /* assumes test_format not 0 on success */
+    if (test_format == 0) {
+        return SDL_SetError("QSA: Couldn't find any hardware audio formats");
+    }
+
+    this->spec.format = test_format;
+
+    /* Set the audio format */
+    cparams.format.format = format;
+
+    /* Set mono/stereo/4ch/6ch/8ch audio */
+    cparams.format.voices = this->spec.channels;
+
+    /* Set rate */
+    cparams.format.rate = this->spec.freq;
+
+    /* Setup the transfer parameters according to cparams */
+    status = snd_pcm_plugin_params(this->hidden->audio_handle, &cparams);
+    if (status < 0) {
+        return QSA_SetError("snd_pcm_plugin_params", status);
+    }
+
+    /* Make sure channel is setup right one last time */
+    SDL_zero(csetup);
+    if (!this->hidden->iscapture) {
+        csetup.channel = SND_PCM_CHANNEL_PLAYBACK;
+    } else {
+        csetup.channel = SND_PCM_CHANNEL_CAPTURE;
+    }
+
+    /* Setup an audio channel */
+    if (snd_pcm_plugin_setup(this->hidden->audio_handle, &csetup) < 0) {
+        return SDL_SetError("QSA: Unable to setup channel");
+    }
+
+    /* Calculate the final parameters for this audio specification */
+    SDL_CalculateAudioSpec(&this->spec);
+
+    this->hidden->pcm_len = this->spec.size;
+
+    if (this->hidden->pcm_len == 0) {
+        this->hidden->pcm_len =
+            csetup.buf.block.frag_size * this->spec.channels *
+            (snd_pcm_format_width(format) / 8);
+    }
+
+    /*
+     * Allocate memory to the audio buffer and initialize with silence
+     *  (Note that buffer size must be a multiple of fragment size, so find
+     *  closest multiple)
+     */
+    this->hidden->pcm_buf =
+        (Uint8 *) SDL_malloc(this->hidden->pcm_len);
+    if (this->hidden->pcm_buf == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_memset(this->hidden->pcm_buf, this->spec.silence,
+               this->hidden->pcm_len);
+
+    /* get the file descriptor */
+    if (!this->hidden->iscapture) {
+        this->hidden->audio_fd =
+            snd_pcm_file_descriptor(this->hidden->audio_handle,
+                                    SND_PCM_CHANNEL_PLAYBACK);
+    } else {
+        this->hidden->audio_fd =
+            snd_pcm_file_descriptor(this->hidden->audio_handle,
+                                    SND_PCM_CHANNEL_CAPTURE);
+    }
+
+    if (this->hidden->audio_fd < 0) {
+        return QSA_SetError("snd_pcm_file_descriptor", status);
+    }
+
+    /* Prepare an audio channel */
+    if (!this->hidden->iscapture) {
+        /* Prepare audio playback */
+        status =
+            snd_pcm_plugin_prepare(this->hidden->audio_handle,
+                                   SND_PCM_CHANNEL_PLAYBACK);
+    } else {
+        /* Prepare audio capture */
+        status =
+            snd_pcm_plugin_prepare(this->hidden->audio_handle,
+                                   SND_PCM_CHANNEL_CAPTURE);
+    }
+
+    if (status < 0) {
+        return QSA_SetError("snd_pcm_plugin_prepare", status);
+    }
+
+    /* We're really ready to rock and roll. :-) */
+    return 0;
+}
+
+static void
+QSA_DetectDevices(void)
+{
+    uint32_t it;
+    uint32_t cards;
+    uint32_t devices;
+    int32_t status;
+
+    /* Detect amount of available devices       */
+    /* this value can be changed in the runtime */
+    cards = snd_cards();
+
+    /* If io-audio manager is not running we will get 0 as number */
+    /* of available audio devices                                 */
+    if (cards == 0) {
+        /* We have no any available audio devices */
+        return;
+    }
+
+    /* !!! FIXME: code duplication */
+    /* Find requested devices by type */
+    {  /* output devices */
+        /* Playback devices enumeration requested */
+        for (it = 0; it < cards; it++) {
+            devices = 0;
+            do {
+                status =
+                    snd_card_get_longname(it,
+                                          qsa_playback_device
+                                          [qsa_playback_devices].name,
+                                          QSA_MAX_NAME_LENGTH);
+                if (status == EOK) {
+                    snd_pcm_t *handle;
+
+                    /* Add device number to device name */
+                    sprintf(qsa_playback_device[qsa_playback_devices].name +
+                            SDL_strlen(qsa_playback_device
+                                       [qsa_playback_devices].name), " d%d",
+                            devices);
+
+                    /* Store associated card number id */
+                    qsa_playback_device[qsa_playback_devices].cardno = it;
+
+                    /* Check if this device id could play anything */
+                    status =
+                        snd_pcm_open(&handle, it, devices,
+                                     SND_PCM_OPEN_PLAYBACK);
+                    if (status == EOK) {
+                        qsa_playback_device[qsa_playback_devices].deviceno =
+                            devices;
+                        status = snd_pcm_close(handle);
+                        if (status == EOK) {
+                            /* Note that spec is NULL, because we are required to open the device before
+                             * acquiring the mix format, making this information inaccessible at
+                             * enumeration time
+                             */
+                            SDL_AddAudioDevice(SDL_FALSE, qsa_playback_device[qsa_playback_devices].name, NULL, &qsa_playback_device[qsa_playback_devices]);
+                            qsa_playback_devices++;
+                        }
+                    } else {
+                        /* Check if we got end of devices list */
+                        if (status == -ENOENT) {
+                            break;
+                        }
+                    }
+                } else {
+                    break;
+                }
+
+                /* Check if we reached maximum devices count */
+                if (qsa_playback_devices >= QSA_MAX_DEVICES) {
+                    break;
+                }
+                devices++;
+            } while (1);
+
+            /* Check if we reached maximum devices count */
+            if (qsa_playback_devices >= QSA_MAX_DEVICES) {
+                break;
+            }
+        }
+    }
+
+    {  /* capture devices */
+        /* Capture devices enumeration requested */
+        for (it = 0; it < cards; it++) {
+            devices = 0;
+            do {
+                status =
+                    snd_card_get_longname(it,
+                                          qsa_capture_device
+                                          [qsa_capture_devices].name,
+                                          QSA_MAX_NAME_LENGTH);
+                if (status == EOK) {
+                    snd_pcm_t *handle;
+
+                    /* Add device number to device name */
+                    sprintf(qsa_capture_device[qsa_capture_devices].name +
+                            SDL_strlen(qsa_capture_device
+                                       [qsa_capture_devices].name), " d%d",
+                            devices);
+
+                    /* Store associated card number id */
+                    qsa_capture_device[qsa_capture_devices].cardno = it;
+
+                    /* Check if this device id could play anything */
+                    status =
+                        snd_pcm_open(&handle, it, devices,
+                                     SND_PCM_OPEN_CAPTURE);
+                    if (status == EOK) {
+                        qsa_capture_device[qsa_capture_devices].deviceno =
+                            devices;
+                        status = snd_pcm_close(handle);
+                        if (status == EOK) {
+                            /* Note that spec is NULL, because we are required to open the device before
+                             * acquiring the mix format, making this information inaccessible at
+                             * enumeration time
+                             */
+                            SDL_AddAudioDevice(SDL_TRUE, qsa_capture_device[qsa_capture_devices].name, NULL, &qsa_capture_device[qsa_capture_devices]);
+                            qsa_capture_devices++;
+                        }
+                    } else {
+                        /* Check if we got end of devices list */
+                        if (status == -ENOENT) {
+                            break;
+                        }
+                    }
+
+                    /* Check if we reached maximum devices count */
+                    if (qsa_capture_devices >= QSA_MAX_DEVICES) {
+                        break;
+                    }
+                } else {
+                    break;
+                }
+                devices++;
+            } while (1);
+
+            /* Check if we reached maximum devices count */
+            if (qsa_capture_devices >= QSA_MAX_DEVICES) {
+                break;
+            }
+        }
+    }
+}
+
+static void
+QSA_Deinitialize(void)
+{
+    /* Clear devices array on shutdown */
+    /* !!! FIXME: we zero these on init...any reason to do it here? */
+    SDL_zeroa(qsa_playback_device);
+    SDL_zeroa(qsa_capture_device);
+    qsa_playback_devices = 0;
+    qsa_capture_devices = 0;
+}
+
+static SDL_bool
+QSA_Init(SDL_AudioDriverImpl * impl)
+{
+    /* Clear devices array */
+    SDL_zeroa(qsa_playback_device);
+    SDL_zeroa(qsa_capture_device);
+    qsa_playback_devices = 0;
+    qsa_capture_devices = 0;
+
+    /* Set function pointers                                     */
+    /* DeviceLock and DeviceUnlock functions are used default,   */
+    /* provided by SDL, which uses pthread_mutex for lock/unlock */
+    impl->DetectDevices = QSA_DetectDevices;
+    impl->OpenDevice = QSA_OpenDevice;
+    impl->ThreadInit = QSA_ThreadInit;
+    impl->WaitDevice = QSA_WaitDevice;
+    impl->PlayDevice = QSA_PlayDevice;
+    impl->GetDeviceBuf = QSA_GetDeviceBuf;
+    impl->CloseDevice = QSA_CloseDevice;
+    impl->Deinitialize = QSA_Deinitialize;
+    impl->LockDevice = NULL;
+    impl->UnlockDevice = NULL;
+
+    impl->ProvidesOwnCallbackThread = 0;
+    impl->HasCaptureSupport = 1;
+    impl->OnlyHasDefaultOutputDevice = 0;
+    impl->OnlyHasDefaultCaptureDevice = 0;
+
+    return SDL_TRUE;   /* this audio target is available. */
+}
+
+AudioBootStrap QSAAUDIO_bootstrap = {
+    "qsa", "QNX QSA Audio", QSA_Init, 0
+};
+
+#endif /* SDL_AUDIO_DRIVER_QNX */
+
+/* vi: set ts=4 sw=4 expandtab: */

src/audio/qnx/SDL_qsa_audio.h

@@ -0,0 +1,57 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#ifndef __SDL_QSA_AUDIO_H__
+#define __SDL_QSA_AUDIO_H__
+
+#include <sys/asoundlib.h>
+
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the audio functions */
+#define _THIS SDL_AudioDevice* this
+
+struct SDL_PrivateAudioData
+{
+    /* SDL capture state */
+    SDL_bool iscapture;
+
+    /* The audio device handle */
+    int cardno;
+    int deviceno;
+    snd_pcm_t *audio_handle;
+
+    /* The audio file descriptor */
+    int audio_fd;
+
+    /* Select timeout status */
+    uint32_t timeout_on_wait;
+
+    /* Raw mixing buffer */
+    Uint8 *pcm_buf;
+    Uint32 pcm_len;
+};
+
+#endif /* __SDL_QSA_AUDIO_H__ */
+
+/* vi: set ts=4 sw=4 expandtab: */

src/video/SDL_sysvideo.h

@@ -483,6 +483,7 @@ extern VideoBootStrap VIVANTE_bootstrap;
 extern VideoBootStrap Emscripten_bootstrap;
 extern VideoBootStrap OFFSCREEN_bootstrap;
 extern VideoBootStrap NGAGE_bootstrap;
+extern VideoBootStrap QNX_bootstrap;
 
 /* Use SDL_OnVideoThread() sparingly, to avoid regressions in use cases that currently happen to work */
 extern SDL_bool SDL_OnVideoThread(void);

src/video/SDL_video.c

@@ -115,6 +115,9 @@ static VideoBootStrap *bootstrap[] = {
 #if SDL_VIDEO_DRIVER_EMSCRIPTEN
     &Emscripten_bootstrap,
 #endif
+#if SDL_VIDEO_DRIVER_QNX
+    &QNX_bootstrap,
+#endif
 #if SDL_VIDEO_DRIVER_OFFSCREEN
     &OFFSCREEN_bootstrap,
 #endif

src/video/qnx/gl.c

@@ -0,0 +1,286 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 2017 BlackBerry Limited
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+#include "sdl_qnx.h"
+
+static EGLDisplay   egl_disp;
+
+/**
+ * Detertmines the pixel format to use based on the current display and EGL
+ * configuration.
+ * @param   egl_conf    EGL configuration to use
+ * @return  A SCREEN_FORMAT* constant for the pixel format to use
+ */
+static int
+chooseFormat(EGLConfig egl_conf)
+{
+    EGLint buffer_bit_depth;
+    EGLint alpha_bit_depth;
+
+    eglGetConfigAttrib(egl_disp, egl_conf, EGL_BUFFER_SIZE, &buffer_bit_depth);
+    eglGetConfigAttrib(egl_disp, egl_conf, EGL_ALPHA_SIZE, &alpha_bit_depth);
+
+    switch (buffer_bit_depth) {
+        case 32:
+            return SCREEN_FORMAT_RGBX8888;
+        case 24:
+            return SCREEN_FORMAT_RGB888;
+        case 16:
+            switch (alpha_bit_depth) {
+                case 4:
+                    return SCREEN_FORMAT_RGBX4444;
+                case 1:
+                    return SCREEN_FORMAT_RGBA5551;
+                default:
+                    return SCREEN_FORMAT_RGB565;
+            }
+        default:
+            return 0;
+    }
+}
+
+/**
+ * Enumerates the supported EGL configurations and chooses a suitable one.
+ * @param[out]  pconf   The chosen configuration
+ * @param[out]  pformat The chosen pixel format
+ * @return 0 if successful, -1 on error
+ */
+int
+glGetConfig(EGLConfig *pconf, int *pformat)
+{
+    EGLConfig egl_conf = (EGLConfig)0;
+    EGLConfig *egl_configs;
+    EGLint egl_num_configs;
+    EGLint val;
+    EGLBoolean rc;
+    EGLint i;
+
+    // Determine the numbfer of configurations.
+    rc = eglGetConfigs(egl_disp, NULL, 0, &egl_num_configs);
+    if (rc != EGL_TRUE) {
+        return -1;
+    }
+
+    if (egl_num_configs == 0) {
+        return -1;
+    }
+
+    // Allocate enough memory for all configurations.
+    egl_configs = SDL_malloc(egl_num_configs * sizeof(*egl_configs));
+    if (egl_configs == NULL) {
+        return -1;
+    }
+
+    // Get the list of configurations.
+    rc = eglGetConfigs(egl_disp, egl_configs, egl_num_configs,
+                       &egl_num_configs);
+    if (rc != EGL_TRUE) {
+        SDL_free(egl_configs);
+        return -1;
+    }
+
+    // Find a good configuration.
+    for (i = 0; i < egl_num_configs; i++) {
+        eglGetConfigAttrib(egl_disp, egl_configs[i], EGL_SURFACE_TYPE, &val);
+        if (!(val & EGL_WINDOW_BIT)) {
+            continue;
+        }
+
+        eglGetConfigAttrib(egl_disp, egl_configs[i], EGL_RENDERABLE_TYPE, &val);
+        if (!(val & EGL_OPENGL_ES2_BIT)) {
+            continue;
+        }
+
+        eglGetConfigAttrib(egl_disp, egl_configs[i], EGL_DEPTH_SIZE, &val);
+        if (val == 0) {
+            continue;
+        }
+
+        egl_conf = egl_configs[i];
+        break;
+    }
+
+    SDL_free(egl_configs);
+    *pconf = egl_conf;
+    *pformat = chooseFormat(egl_conf);
+
+    return 0;
+}
+
+/**
+ * Initializes the EGL library.
+ * @param   _THIS
+ * @param   name    unused
+ * @return  0 if successful, -1 on error
+ */
+int
+glLoadLibrary(_THIS, const char *name)
+{
+    EGLNativeDisplayType    disp_id = EGL_DEFAULT_DISPLAY;
+
+    egl_disp = eglGetDisplay(disp_id);
+    if (egl_disp == EGL_NO_DISPLAY) {
+        return -1;
+    }
+
+    if (eglInitialize(egl_disp, NULL, NULL) == EGL_FALSE) {
+        return -1;
+    }
+
+    return 0;
+}
+
+/**
+ * Finds the address of an EGL extension function.
+ * @param   proc    Function name
+ * @return  Function address
+ */
+void *
+glGetProcAddress(_THIS, const char *proc)
+{
+    return eglGetProcAddress(proc);
+}
+
+/**
+ * Associates the given window with the necessary EGL structures for drawing and
+ * displaying content.
+ * @param   _THIS
+ * @param   window  The SDL window to create the context for
+ * @return  A pointer to the created context, if successful, NULL on error
+ */
+SDL_GLContext
+glCreateContext(_THIS, SDL_Window *window)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    EGLContext      context;
+    EGLSurface      surface;
+
+    struct {
+        EGLint client_version[2];
+        EGLint none;
+    } egl_ctx_attr = {
+        .client_version = { EGL_CONTEXT_CLIENT_VERSION, 2 },
+        .none = EGL_NONE
+    };
+
+    struct {
+        EGLint render_buffer[2];
+        EGLint none;
+    } egl_surf_attr = {
+        .render_buffer = { EGL_RENDER_BUFFER, EGL_BACK_BUFFER },
+        .none = EGL_NONE
+    };
+
+    context = eglCreateContext(egl_disp, impl->conf, EGL_NO_CONTEXT,
+                               (EGLint *)&egl_ctx_attr);
+    if (context == EGL_NO_CONTEXT) {
+        return NULL;
+    }
+
+    surface = eglCreateWindowSurface(egl_disp, impl->conf,
+                                     (EGLNativeWindowType)impl->window,
+                                     (EGLint *)&egl_surf_attr);
+    if (surface == EGL_NO_SURFACE) {
+        return NULL;
+    }
+
+    eglMakeCurrent(egl_disp, surface, surface, context);
+
+    impl->surface = surface;
+    return context;
+}
+
+/**
+ * Sets a new value for the number of frames to display before swapping buffers.
+ * @param   _THIS
+ * @param   interval    New interval value
+ * @return  0 if successful, -1 on error
+ */
+int
+glSetSwapInterval(_THIS, int interval)
+{
+    if (eglSwapInterval(egl_disp, interval) != EGL_TRUE) {
+        return -1;
+    }
+
+    return 0;
+}
+
+/**
+ * Swaps the EGL buffers associated with the given window
+ * @param   _THIS
+ * @param   window  Window to swap buffers for
+ * @return  0 if successful, -1 on error
+ */
+int
+glSwapWindow(_THIS, SDL_Window *window)
+{
+    /* !!! FIXME: should we migrate this all over to use SDL_egl.c? */
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    return eglSwapBuffers(egl_disp, impl->surface) == EGL_TRUE ? 0 : -1;
+}
+
+/**
+ * Makes the given context the current one for drawing operations.
+ * @param   _THIS
+ * @param   window  SDL window associated with the context (maybe NULL)
+ * @param   context The context to activate
+ * @return  0 if successful, -1 on error
+ */
+int
+glMakeCurrent(_THIS, SDL_Window *window, SDL_GLContext context)
+{
+    window_impl_t   *impl;
+    EGLSurface      surface = NULL;
+
+    if (window) {
+        impl = (window_impl_t *)window->driverdata;
+        surface = impl->surface;
+    }
+
+    if (eglMakeCurrent(egl_disp, surface, surface, context) != EGL_TRUE) {
+        return -1;
+    }
+
+    return 0;
+}
+
+/**
+ * Destroys a context.
+ * @param   _THIS
+ * @param   context The context to destroy
+ */
+void
+glDeleteContext(_THIS, SDL_GLContext context)
+{
+    eglDestroyContext(egl_disp, context);
+}
+
+/**
+ * Terminates access to the EGL library.
+ * @param   _THIS
+ */
+void
+glUnloadLibrary(_THIS)
+{
+    eglTerminate(egl_disp);
+}

src/video/qnx/keyboard.c

@@ -0,0 +1,133 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 2017 BlackBerry Limited
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+#include "../../events/SDL_keyboard_c.h"
+#include "SDL3/SDL_scancode.h"
+#include "SDL3/SDL_events.h"
+#include "sdl_qnx.h"
+#include <sys/keycodes.h>
+
+/**
+ * A map thta translates Screen key names to SDL scan codes.
+ * This map is incomplete, but should include most major keys.
+ */
+static int key_to_sdl[] = {
+    [KEYCODE_SPACE] = SDL_SCANCODE_SPACE,
+    [KEYCODE_APOSTROPHE] = SDL_SCANCODE_APOSTROPHE,
+    [KEYCODE_COMMA] = SDL_SCANCODE_COMMA,
+    [KEYCODE_MINUS] = SDL_SCANCODE_MINUS,
+    [KEYCODE_PERIOD] = SDL_SCANCODE_PERIOD,
+    [KEYCODE_SLASH] = SDL_SCANCODE_SLASH,
+    [KEYCODE_ZERO] = SDL_SCANCODE_0,
+    [KEYCODE_ONE] = SDL_SCANCODE_1,
+    [KEYCODE_TWO] = SDL_SCANCODE_2,
+    [KEYCODE_THREE] = SDL_SCANCODE_3,
+    [KEYCODE_FOUR] = SDL_SCANCODE_4,
+    [KEYCODE_FIVE] = SDL_SCANCODE_5,
+    [KEYCODE_SIX] = SDL_SCANCODE_6,
+    [KEYCODE_SEVEN] = SDL_SCANCODE_7,
+    [KEYCODE_EIGHT] = SDL_SCANCODE_8,
+    [KEYCODE_NINE] = SDL_SCANCODE_9,
+    [KEYCODE_SEMICOLON] = SDL_SCANCODE_SEMICOLON,
+    [KEYCODE_EQUAL] = SDL_SCANCODE_EQUALS,
+    [KEYCODE_LEFT_BRACKET] = SDL_SCANCODE_LEFTBRACKET,
+    [KEYCODE_BACK_SLASH] = SDL_SCANCODE_BACKSLASH,
+    [KEYCODE_RIGHT_BRACKET] = SDL_SCANCODE_RIGHTBRACKET,
+    [KEYCODE_GRAVE] = SDL_SCANCODE_GRAVE,
+    [KEYCODE_A] = SDL_SCANCODE_A,
+    [KEYCODE_B] = SDL_SCANCODE_B,
+    [KEYCODE_C] = SDL_SCANCODE_C,
+    [KEYCODE_D] = SDL_SCANCODE_D,
+    [KEYCODE_E] = SDL_SCANCODE_E,
+    [KEYCODE_F] = SDL_SCANCODE_F,
+    [KEYCODE_G] = SDL_SCANCODE_G,
+    [KEYCODE_H] = SDL_SCANCODE_H,
+    [KEYCODE_I] = SDL_SCANCODE_I,
+    [KEYCODE_J] = SDL_SCANCODE_J,
+    [KEYCODE_K] = SDL_SCANCODE_K,
+    [KEYCODE_L] = SDL_SCANCODE_L,
+    [KEYCODE_M] = SDL_SCANCODE_M,
+    [KEYCODE_N] = SDL_SCANCODE_N,
+    [KEYCODE_O] = SDL_SCANCODE_O,
+    [KEYCODE_P] = SDL_SCANCODE_P,
+    [KEYCODE_Q] = SDL_SCANCODE_Q,
+    [KEYCODE_R] = SDL_SCANCODE_R,
+    [KEYCODE_S] = SDL_SCANCODE_S,
+    [KEYCODE_T] = SDL_SCANCODE_T,
+    [KEYCODE_U] = SDL_SCANCODE_U,
+    [KEYCODE_V] = SDL_SCANCODE_V,
+    [KEYCODE_W] = SDL_SCANCODE_W,
+    [KEYCODE_X] = SDL_SCANCODE_X,
+    [KEYCODE_Y] = SDL_SCANCODE_Y,
+    [KEYCODE_Z] = SDL_SCANCODE_Z,
+    [KEYCODE_UP] = SDL_SCANCODE_UP,
+    [KEYCODE_DOWN] = SDL_SCANCODE_DOWN,
+    [KEYCODE_LEFT] = SDL_SCANCODE_LEFT,
+    [KEYCODE_PG_UP] = SDL_SCANCODE_PAGEUP,
+    [KEYCODE_PG_DOWN] = SDL_SCANCODE_PAGEDOWN,
+    [KEYCODE_RIGHT] = SDL_SCANCODE_RIGHT,
+    [KEYCODE_RETURN] = SDL_SCANCODE_RETURN,
+    [KEYCODE_TAB] = SDL_SCANCODE_TAB,
+    [KEYCODE_ESCAPE] = SDL_SCANCODE_ESCAPE,
+};
+
+/**
+ * Called from the event dispatcher when a keyboard event is encountered.
+ * Translates the event such that it can be handled by SDL.
+ * @param   event   Screen keyboard event
+ */
+void
+handleKeyboardEvent(screen_event_t event)
+{
+    int             val;
+    SDL_Scancode    scancode;
+
+    // Get the key value.
+    if (screen_get_event_property_iv(event, SCREEN_PROPERTY_SYM, &val) < 0) {
+        return;
+    }
+
+    // Skip unrecognized keys.
+    if ((val < 0) || (val >= SDL_TABLESIZE(key_to_sdl))) {
+        return;
+    }
+
+    // Translate to an SDL scan code.
+    scancode = key_to_sdl[val];
+    if (scancode == 0) {
+        return;
+    }
+
+    // Get event flags (key state).
+    if (screen_get_event_property_iv(event, SCREEN_PROPERTY_FLAGS, &val) < 0) {
+        return;
+    }
+
+    // Propagate the event to SDL.
+    // FIXME:
+    // Need to handle more key states (such as key combinations).
+    if (val & KEY_DOWN) {
+        SDL_SendKeyboardKey(0, SDL_PRESSED, scancode);
+    } else {
+        SDL_SendKeyboardKey(0, SDL_RELEASED, scancode);
+    }
+}

src/video/qnx/sdl_qnx.h

@@ -0,0 +1,48 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 2017 BlackBerry Limited
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef __SDL_QNX_H__
+#define __SDL_QNX_H__
+
+#include "../SDL_sysvideo.h"
+#include <screen/screen.h>
+#include <EGL/egl.h>
+
+typedef struct
+{
+    screen_window_t window;
+    EGLSurface      surface;
+    EGLConfig       conf;
+} window_impl_t;
+
+extern void handleKeyboardEvent(screen_event_t event);
+
+extern int glGetConfig(EGLConfig *pconf, int *pformat);
+extern int glLoadLibrary(_THIS, const char *name);
+void *glGetProcAddress(_THIS, const char *proc);
+extern SDL_GLContext glCreateContext(_THIS, SDL_Window *window);
+extern int glSetSwapInterval(_THIS, int interval);
+extern int glSwapWindow(_THIS, SDL_Window *window);
+extern int glMakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context);
+extern void glDeleteContext(_THIS, SDL_GLContext context);
+extern void glUnloadLibrary(_THIS);
+
+#endif

src/video/qnx/video.c

@@ -0,0 +1,357 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 2017 BlackBerry Limited
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+#include "../SDL_sysvideo.h"
+#include "sdl_qnx.h"
+
+static screen_context_t context;
+static screen_event_t   event;
+
+/**
+ * Initializes the QNX video plugin.
+ * Creates the Screen context and event handles used for all window operations
+ * by the plugin.
+ * @param   _THIS
+ * @return  0 if successful, -1 on error
+ */
+static int
+videoInit(_THIS)
+{
+    SDL_VideoDisplay display;
+
+    if (screen_create_context(&context, 0) < 0) {
+        return -1;
+    }
+
+    if (screen_create_event(&event) < 0) {
+        return -1;
+    }
+
+    SDL_zero(display);
+
+    if (SDL_AddVideoDisplay(&display, SDL_FALSE) < 0) {
+        return -1;
+    }
+
+    _this->num_displays = 1;
+    return 0;
+}
+
+static void
+videoQuit(_THIS)
+{
+}
+
+/**
+ * Creates a new native Screen window and associates it with the given SDL
+ * window.
+ * @param   _THIS
+ * @param   window  SDL window to initialize
+ * @return  0 if successful, -1 on error
+ */
+static int
+createWindow(_THIS, SDL_Window *window)
+{
+    window_impl_t   *impl;
+    int             size[2];
+    int             numbufs;
+    int             format;
+    int             usage;
+
+    impl = SDL_calloc(1, sizeof(*impl));
+    if (impl == NULL) {
+        return -1;
+    }
+
+    // Create a native window.
+    if (screen_create_window(&impl->window, context) < 0) {
+        goto fail;
+    }
+
+    // Set the native window's size to match the SDL window.
+    size[0] = window->w;
+    size[1] = window->h;
+
+    if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SIZE,
+                                      size) < 0) {
+        goto fail;
+    }
+
+    if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SOURCE_SIZE,
+                                      size) < 0) {
+        goto fail;
+    }
+
+    // Create window buffer(s).
+    if (window->flags & SDL_WINDOW_OPENGL) {
+        if (glGetConfig(&impl->conf, &format) < 0) {
+            goto fail;
+        }
+        numbufs = 2;
+
+        usage = SCREEN_USAGE_OPENGL_ES2;
+        if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_USAGE,
+                                          &usage) < 0) {
+            return -1;
+        }
+    } else {
+        format = SCREEN_FORMAT_RGBX8888;
+        numbufs = 1;
+    }
+
+    // Set pixel format.
+    if (screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_FORMAT,
+                                      &format) < 0) {
+        goto fail;
+    }
+
+    // Create buffer(s).
+    if (screen_create_window_buffers(impl->window, numbufs) < 0) {
+        goto fail;
+    }
+
+    window->driverdata = impl;
+    return 0;
+
+fail:
+    if (impl->window) {
+        screen_destroy_window(impl->window);
+    }
+
+    SDL_free(impl);
+    return -1;
+}
+
+/**
+ * Gets a pointer to the Screen buffer associated with the given window. Note
+ * that the buffer is actually created in createWindow().
+ * @param       _THIS
+ * @param       window  SDL window to get the buffer for
+ * @param[out]  pixles  Holds a pointer to the window's buffer
+ * @param[out]  format  Holds the pixel format for the buffer
+ * @param[out]  pitch   Holds the number of bytes per line
+ * @return  0 if successful, -1 on error
+ */
+static int
+createWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format,
+                        void ** pixels, int *pitch)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    screen_buffer_t buffer;
+
+    // Get a pointer to the buffer's memory.
+    if (screen_get_window_property_pv(impl->window, SCREEN_PROPERTY_BUFFERS,
+                                      (void **)&buffer) < 0) {
+        return -1;
+    }
+
+    if (screen_get_buffer_property_pv(buffer, SCREEN_PROPERTY_POINTER,
+                                      pixels) < 0) {
+        return -1;
+    }
+
+    // Set format and pitch.
+    if (screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_STRIDE,
+                                      pitch) < 0) {
+        return -1;
+    }
+
+    *format = SDL_PIXELFORMAT_RGB888;
+    return 0;
+}
+
+/**
+ * Informs the window manager that the window needs to be updated.
+ * @param   _THIS
+ * @param   window      The window to update
+ * @param   rects       An array of reectangular areas to update
+ * @param   numrects    Rect array length
+ * @return  0 if successful, -1 on error
+ */
+static int
+updateWindowFramebuffer(_THIS, SDL_Window *window, const SDL_Rect *rects,
+                        int numrects)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    screen_buffer_t buffer;
+
+    if (screen_get_window_property_pv(impl->window, SCREEN_PROPERTY_BUFFERS,
+                                      (void **)&buffer) < 0) {
+        return -1;
+    }
+
+    screen_post_window(impl->window, buffer, numrects, (int *)rects, 0);
+    screen_flush_context(context, 0);
+    return 0;
+}
+
+/**
+ * Runs the main event loop.
+ * @param   _THIS
+ */
+static void
+pumpEvents(_THIS)
+{
+    int             type;
+
+    for (;;) {
+        if (screen_get_event(context, event, 0) < 0) {
+            break;
+        }
+
+        if (screen_get_event_property_iv(event, SCREEN_PROPERTY_TYPE, &type)
+            < 0) {
+            break;
+        }
+
+        if (type == SCREEN_EVENT_NONE) {
+            break;
+        }
+
+        switch (type) {
+        case SCREEN_EVENT_KEYBOARD:
+            handleKeyboardEvent(event);
+            break;
+
+        default:
+            break;
+        }
+    }
+}
+
+/**
+ * Updates the size of the native window using the geometry of the SDL window.
+ * @param   _THIS
+ * @param   window  SDL window to update
+ */
+static void
+setWindowSize(_THIS, SDL_Window *window)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    int             size[2];
+
+    size[0] = window->w;
+    size[1] = window->h;
+
+    screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SIZE, size);
+    screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_SOURCE_SIZE,
+                                  size);
+}
+
+/**
+ * Makes the native window associated with the given SDL window visible.
+ * @param   _THIS
+ * @param   window  SDL window to update
+ */
+static void
+showWindow(_THIS, SDL_Window *window)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    const int       visible = 1;
+
+    screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_VISIBLE,
+                                  &visible);
+}
+
+/**
+ * Makes the native window associated with the given SDL window invisible.
+ * @param   _THIS
+ * @param   window  SDL window to update
+ */
+static void
+hideWindow(_THIS, SDL_Window *window)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+    const int       visible = 0;
+
+    screen_set_window_property_iv(impl->window, SCREEN_PROPERTY_VISIBLE,
+        &visible);
+}
+
+/**
+ * Destroys the native window associated with the given SDL window.
+ * @param   _THIS
+ * @param   window  SDL window that is being destroyed
+ */
+static void
+destroyWindow(_THIS, SDL_Window *window)
+{
+    window_impl_t   *impl = (window_impl_t *)window->driverdata;
+
+    if (impl) {
+        screen_destroy_window(impl->window);
+        window->driverdata = NULL;
+    }
+}
+
+/**
+ * Frees the plugin object created by createDevice().
+ * @param   device  Plugin object to free
+ */
+static void
+deleteDevice(SDL_VideoDevice *device)
+{
+    SDL_free(device);
+}
+
+/**
+ * Creates the QNX video plugin used by SDL.
+ * @return  Initialized device if successful, NULL otherwise
+ */
+static SDL_VideoDevice *
+createDevice()
+{
+    SDL_VideoDevice *device;
+
+    device = (SDL_VideoDevice *)SDL_calloc(1, sizeof(SDL_VideoDevice));
+    if (device == NULL) {
+        return NULL;
+    }
+
+    device->driverdata = NULL;
+    device->VideoInit = videoInit;
+    device->VideoQuit = videoQuit;
+    device->CreateSDLWindow = createWindow;
+    device->CreateWindowFramebuffer = createWindowFramebuffer;
+    device->UpdateWindowFramebuffer = updateWindowFramebuffer;
+    device->SetWindowSize = setWindowSize;
+    device->ShowWindow = showWindow;
+    device->HideWindow = hideWindow;
+    device->PumpEvents = pumpEvents;
+    device->DestroyWindow = destroyWindow;
+
+    device->GL_LoadLibrary = glLoadLibrary;
+    device->GL_GetProcAddress = glGetProcAddress;
+    device->GL_CreateContext = glCreateContext;
+    device->GL_SetSwapInterval = glSetSwapInterval;
+    device->GL_SwapWindow = glSwapWindow;
+    device->GL_MakeCurrent = glMakeCurrent;
+    device->GL_DeleteContext = glDeleteContext;
+    device->GL_UnloadLibrary = glUnloadLibrary;
+
+    device->free = deleteDevice;
+    return device;
+}
+
+VideoBootStrap QNX_bootstrap = {
+    "qnx", "QNX Screen",
+    createDevice
+};