mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-01-11 01:45:33 +00:00
Code Issues 1 Projects Releases Wiki Activity

gstqmlgl: rework WGL-specific context init code

Browse source 
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1032>
This commit is contained in:
Dmitry Shusharin 2021-07-30 17:20:59 +07:00 committed by GStreamer Marge Bot
parent 83dbeac150
commit 5dca098f6a
1 changed files with 69 additions and 71 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

140
ext/qt/gstqtglutility.cc
View file

@ -119,16 +119,16 @@ gst_qt_get_gl_display (gboolean sink)
if (QString::fromUtf8("eglfs") == app->platformName()) {
#if GST_GL_HAVE_WINDOW_VIV_FB
/* FIXME: Could get the display directly from Qt like this
QPlatformNativeInterface *native =
QGuiApplication::platformNativeInterface();
EGLDisplay egl_display = (EGLDisplay)
native->nativeResourceForWindow("egldisplay", NULL);
However we seem to have no way for getting the EGLNativeDisplayType, aka
native_display, via public API. As such we have to assume that display 0
is always used. Only way around that is parsing the index the same way as
Qt does in QEGLDeviceIntegration::fbDeviceName(), so let's do that.
*/
* QPlatformNativeInterface *native =
* QGuiApplication::platformNativeInterface();
* EGLDisplay egl_display = (EGLDisplay)
* native->nativeResourceForWindow("egldisplay", NULL);
*
* However we seem to have no way for getting the EGLNativeDisplayType, aka
* native_display, via public API. As such we have to assume that display 0
* is always used. Only way around that is parsing the index the same way as
* Qt does in QEGLDeviceIntegration::fbDeviceName(), so let's do that.
*/
const gchar *fb_dev;
gint disp_idx = 0;
@ -182,21 +182,11 @@ gst_qt_get_gl_wrapcontext (GstGLDisplay * display,
GstGLPlatform G_GNUC_UNUSED platform = (GstGLPlatform) 0;
GstGLAPI G_GNUC_UNUSED gl_api;
guintptr G_GNUC_UNUSED gl_handle;
GError *error = NULL;
GstGLContext *current;
GError *error;
g_return_val_if_fail (display != NULL && wrap_glcontext != NULL, FALSE);
/* see if we already have a current GL context in GStreamer for this thread */
{
GstGLContext *current = gst_gl_context_get_current ();
if (current) {
if (current->display == display) {
*wrap_glcontext = static_cast<GstGLContext *> (gst_object_ref (current));
return TRUE;
}
}
}
#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
if (GST_IS_GL_DISPLAY_X11 (display)) {
#if GST_GL_HAVE_PLATFORM_GLX
@ -237,62 +227,70 @@ gst_qt_get_gl_wrapcontext (GstGLDisplay * display,
gl_api = gst_gl_context_get_current_gl_api (platform, NULL, NULL);
gl_handle = gst_gl_context_get_current_gl_context (platform);
if (gl_handle)
*wrap_glcontext =
gst_gl_context_new_wrapped (display, gl_handle,
platform, gl_api);
if (!*wrap_glcontext) {
GST_ERROR ("cannot wrap qt OpenGL context");
return FALSE;
/* see if we already have a current GL context in GStreamer for this thread */
current = gst_gl_context_get_current ();
if (current && current->display == display) {
/* just use current context we found */
*wrap_glcontext = static_cast<GstGLContext *> (gst_object_ref (current));
}
else {
if (gl_handle)
*wrap_glcontext =
gst_gl_context_new_wrapped (display, gl_handle,
platform, gl_api);
if (!*wrap_glcontext) {
GST_ERROR ("cannot wrap qt OpenGL context");
return FALSE;
}
gst_gl_context_activate(*wrap_glcontext, TRUE);
if (!gst_gl_context_fill_info (*wrap_glcontext, &error)) {
GST_ERROR ("failed to retrieve qt context info: %s", error->message);
gst_clear_object (wrap_glcontext);
return FALSE;
}
gst_gl_context_activate(*wrap_glcontext, TRUE);
if (!gst_gl_context_fill_info (*wrap_glcontext, &error)) {
GST_ERROR ("failed to retrieve qt context info: %s", error->message);
gst_object_unref (*wrap_glcontext);
*wrap_glcontext = NULL;
return FALSE;
} else {
gst_gl_display_filter_gl_api (display, gst_gl_context_get_gl_api (*wrap_glcontext));
#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
g_return_val_if_fail (context != NULL, FALSE);
G_STMT_START {
/* If there's no wglCreateContextAttribsARB() support, then we would fallback to
* wglShareLists() which will fail with ERROR_BUSY (0xaa) if either of the GL
* contexts are current in any other thread.
*
* The workaround here is to temporarily disable Qt's GL context while we
* set up our own.
*
* Sometimes wglCreateContextAttribsARB()
* exists, but isn't functional (some Intel drivers), so it's easiest to do this
* unconditionally.
*/
/* retrieve Qt's GL device context as current device context */
HDC device = wglGetCurrentDC ();
wglMakeCurrent (device, 0);
*context = gst_gl_context_new (display);
if (!gst_gl_context_create (*context, *wrap_glcontext, &error)) {
GST_ERROR ("failed to create shared GL context: %s", error->message);
gst_object_unref (*context);
*context = NULL;
gst_object_unref (*wrap_glcontext);
*wrap_glcontext = NULL;
wglMakeCurrent (device, (HGLRC) gl_handle);
return FALSE;
}
wglMakeCurrent (device, (HGLRC) gl_handle);
} G_STMT_END;
#endif
gst_gl_context_activate (*wrap_glcontext, FALSE);
}
#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
g_return_val_if_fail (context != NULL, FALSE);
G_STMT_START {
/* If there's no wglCreateContextAttribsARB() support, then we would fallback to
* wglShareLists() which will fail with ERROR_BUSY (0xaa) if either of the GL
* contexts are current in any other thread.
*
* The workaround here is to temporarily disable Qt's GL context while we
* set up our own.
*
* Sometimes wglCreateContextAttribsARB()
* exists, but isn't functional (some Intel drivers), so it's easiest to do this
* unconditionally.
*/
/* retrieve Qt's GL device context as current device context */
HDC device = wglGetCurrentDC ();
*context = gst_gl_context_new (display);
wglMakeCurrent (NULL, NULL);
if (!gst_gl_context_create (*context, *wrap_glcontext, &error)) {
GST_ERROR ("failed to create shared GL context: %s", error->message);
gst_clear_object (wrap_glcontext);
gst_clear_object (context);
}
wglMakeCurrent (device, (HGLRC) gl_handle);
if (!*context)
return FALSE;
} G_STMT_END;
#endif
return TRUE;
}