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gstreamer/ext/qt/gstqtglutility.cc
Matthew Waters 92c89e2a31 gl/caopengllayer: use public GstGLContext instead of Cocoa-specific one 
Allows keeping the GstGLCAOpenGLLayer public but not the winsys-specific
context/display/window.
2017-11-27 15:20:28 +11:00

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/*
* GStreamer
* Copyright (C) 2016 Freescale Semiconductor, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstqtglutility.h"
#include <QtGui/QGuiApplication>
#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
#include <QX11Info>
#include <gst/gl/x11/gstgldisplay_x11.h>
#if GST_GL_HAVE_PLATFORM_GLX
#include <gst/gl/x11/gstglcontext_glx.h>
#elif GST_GL_HAVE_PLATFORM_EGL
#include <gst/gl/egl/gstglcontext_egl.h>
#endif
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_WAYLAND)
#include <qpa/qplatformnativeinterface.h>
#include <gst/gl/wayland/gstgldisplay_wayland.h>
#endif
#if GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_EGLFS)
#if GST_GL_HAVE_WINDOW_VIV_FB
#include <qpa/qplatformnativeinterface.h>
#include <gst/gl/viv-fb/gstgldisplay_viv_fb.h>
#else
#include <gst/gl/egl/gstegl.h>
#include <gst/gl/egl/gstgldisplay_egl.h>
#endif
#include <gst/gl/egl/gstglcontext_egl.h>
#endif
#define GST_CAT_DEFAULT qt_gl_utils_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
GstGLDisplay *
gst_qt_get_gl_display ()
{
GstGLDisplay *display = NULL;
QGuiApplication *app = static_cast<QGuiApplication *> (QCoreApplication::instance ());
static volatile gsize _debug;
g_assert (app != NULL);
if (g_once_init_enter (&_debug)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qtglutility", 0,
"Qt gl utility functions");
g_once_init_leave (&_debug, 1);
}
GST_INFO ("QGuiApplication::instance()->platformName() %s", app->platformName().toUtf8().data());
#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
if (QString::fromUtf8 ("xcb") == app->platformName())
display = (GstGLDisplay *)
gst_gl_display_x11_new_with_display (QX11Info::display ());
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_WAYLAND)
if (QString::fromUtf8 ("wayland") == app->platformName()
|| QString::fromUtf8 ("wayland-egl") == app->platformName()){
struct wl_display * wayland_display;
QPlatformNativeInterface *native =
QGuiApplication::platformNativeInterface();
wayland_display = (struct wl_display *)
native->nativeResourceForWindow("display", NULL);
display = (GstGLDisplay *)
gst_gl_display_wayland_new_with_display (wayland_display);
}
#endif
#if GST_GL_HAVE_PLATFORM_EGL && GST_GL_HAVE_WINDOW_ANDROID
if (QString::fromUtf8 ("android") == app->platformName())
display = (GstGLDisplay *) gst_gl_display_egl_new_with_egl_display (eglGetDisplay(EGL_DEFAULT_DISPLAY));
#elif GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_EGLFS)
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.
*/
const gchar *fb_dev;
gint disp_idx = 0;
fb_dev = g_getenv ("QT_QPA_EGLFS_FB");
if (fb_dev) {
if (sscanf (fb_dev, "/dev/fb%d", &disp_idx) != 1)
disp_idx = 0;
}
display = (GstGLDisplay *) gst_gl_display_viv_fb_new (disp_idx);
#else
display = (GstGLDisplay *) gst_gl_display_egl_new_with_egl_display (eglGetDisplay(EGL_DEFAULT_DISPLAY));
#endif
}
#endif
#if GST_GL_HAVE_WINDOW_COCOA && GST_GL_HAVE_PLATFORM_CGL && defined (HAVE_QT_MAC)
if (QString::fromUtf8 ("cocoa") == app->platformName())
display = (GstGLDisplay *) gst_gl_display_new ();
#endif
#if GST_GL_HAVE_WINDOW_EAGL && GST_GL_HAVE_PLATFORM_EAGL && defined (HAVE_QT_IOS)
if (QString::fromUtf8 ("ios") == app->platformName())
display = gst_gl_display_new ();
#endif
#if GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
if (QString::fromUtf8 ("windows") == app->platformName())
display = gst_gl_display_new ();
#endif
if (!display)
display = gst_gl_display_new ();
return display;
}
gboolean
gst_qt_get_gl_wrapcontext (GstGLDisplay * display,
GstGLContext **wrap_glcontext, GstGLContext **context)
{
GstGLPlatform platform = (GstGLPlatform) 0;
GstGLAPI gl_api;
guintptr gl_handle;
GError *error = NULL;
g_return_val_if_fail (display != NULL && wrap_glcontext != NULL, FALSE);
#if GST_GL_HAVE_WINDOW_X11 && defined (HAVE_QT_X11)
if (GST_IS_GL_DISPLAY_X11 (display)) {
#if GST_GL_HAVE_PLATFORM_GLX
platform = GST_GL_PLATFORM_GLX;
#elif GST_GL_HAVE_PLATFORM_EGL
platform = GST_GL_PLATFORM_EGL;
#endif
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND && defined (HAVE_QT_WAYLAND)
if (GST_IS_GL_DISPLAY_WAYLAND (display)) {
platform = GST_GL_PLATFORM_EGL;
}
#endif
#if GST_GL_HAVE_PLATFORM_EGL && defined (HAVE_QT_EGLFS)
#if GST_GL_HAVE_WINDOW_VIV_FB
if (GST_IS_GL_DISPLAY_VIV_FB (display)) {
#else
if (GST_IS_GL_DISPLAY_EGL (display)) {
#endif
platform = GST_GL_PLATFORM_EGL;
}
#endif
if (platform == 0) {
#if GST_GL_HAVE_WINDOW_COCOA && GST_GL_HAVE_PLATFORM_CGL && defined (HAVE_QT_MAC)
platform = GST_GL_PLATFORM_CGL;
#elif GST_GL_HAVE_WINDOW_EAGL && GST_GL_HAVE_PLATFORM_EAGL && defined (HAVE_QT_IOS)
platform = GST_GL_PLATFORM_EAGL;
#elif GST_GL_HAVE_WINDOW_WIN32 && GST_GL_HAVE_PLATFORM_WGL && defined (HAVE_QT_WIN32)
platform = GST_GL_PLATFORM_WGL;
#else
GST_ERROR ("Unknown platform");
return FALSE;
#endif
}
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;
}
(void) platform;
(void) gl_api;
(void) gl_handle;
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);
g_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 {
GstGLWindow *window;
HDC device;
/* 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.
*/
*context = gst_gl_context_new (display);
window = gst_gl_context_get_window (*context);
device = (HDC) gst_gl_window_get_display (window);
wglMakeCurrent (device, 0);
gst_object_unref (window);
if (!gst_gl_context_create (*context, *wrap_glcontext, &error)) {
GST_ERROR ("%p failed to create shared GL context: %s", this, error->message);
g_object_unref (*context);
*context = NULL;
g_object_unref (*wrap_glcontext);
*wrap_glcontext = NULL;
wglMakeCurrent (device, (HGLRC) gl_handle);
return FALSE;
}
wglMakeCurrent (device, (HGLRC) gl_handle);
}
#endif
gst_gl_context_activate (*wrap_glcontext, FALSE);
} G_STMT_END;
return TRUE;
}
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