gstreamer/gst-libs/gst/gl/x11/gstglwindow_x11.c
Matthew Waters 384434b060 glwindow_x11: allow expose events to redraw our window
otherwise we will not update the window contents on low framerate
streams until the next buffer

https://bugzilla.gnome.org/show_bug.cgi?id=723529
2017-12-09 19:31:42 +00:00

666 lines
19 KiB
C

/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
*
* 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.
*/
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <locale.h>
#include "x11_event_source.h"
#include "gstglwindow_x11.h"
#include "gstgldisplay_x11.h"
#define GST_GL_WINDOW_X11_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW_X11, GstGLWindowX11Private))
#define GST_CAT_DEFAULT gst_gl_window_debug
#define gst_gl_window_x11_parent_class parent_class
G_DEFINE_TYPE (GstGLWindowX11, gst_gl_window_x11, GST_GL_TYPE_WINDOW);
/* X error trap */
static int TrappedErrorCode = 0;
static int (*old_error_handler) (Display *, XErrorEvent *);
gboolean gst_gl_window_x11_handle_event (GstGLWindowX11 * window_x11);
enum
{
ARG_0,
ARG_DISPLAY
};
struct _GstGLWindowX11Private
{
gboolean activate;
gboolean activate_result;
};
guintptr gst_gl_window_x11_get_display (GstGLWindow * window);
guintptr gst_gl_window_x11_get_gl_context (GstGLWindow * window);
gboolean gst_gl_window_x11_activate (GstGLWindow * window, gboolean activate);
void gst_gl_window_x11_set_window_handle (GstGLWindow * window,
guintptr handle);
guintptr gst_gl_window_x11_get_window_handle (GstGLWindow * window);
void gst_gl_window_x11_draw_unlocked (GstGLWindow * window, guint width,
guint height);
void gst_gl_window_x11_draw (GstGLWindow * window, guint width, guint height);
void gst_gl_window_x11_run (GstGLWindow * window);
void gst_gl_window_x11_quit (GstGLWindow * window);
void gst_gl_window_x11_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
gboolean gst_gl_window_x11_create_context (GstGLWindow * window,
GstGLAPI gl_api, guintptr external_gl_context, GError ** error);
gboolean gst_gl_window_x11_open (GstGLWindow * window, GError ** error);
void gst_gl_window_x11_close (GstGLWindow * window);
static void
gst_gl_window_x11_finalize (GObject * object)
{
g_return_if_fail (GST_GL_IS_WINDOW_X11 (object));
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_gl_window_x11_class_init (GstGLWindowX11Class * klass)
{
GObjectClass *obj_class = G_OBJECT_CLASS (klass);
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLWindowX11Private));
obj_class->finalize = gst_gl_window_x11_finalize;
window_class->get_display = GST_DEBUG_FUNCPTR (gst_gl_window_x11_get_display);
window_class->set_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_set_window_handle);
window_class->get_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_get_window_handle);
window_class->draw_unlocked =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_draw_unlocked);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_x11_draw);
window_class->run = GST_DEBUG_FUNCPTR (gst_gl_window_x11_run);
window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_x11_quit);
window_class->send_message_async =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_send_message_async);
window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_x11_open);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_x11_close);
}
static void
gst_gl_window_x11_init (GstGLWindowX11 * window)
{
window->priv = GST_GL_WINDOW_X11_GET_PRIVATE (window);
}
/* Must be called in the gl thread */
GstGLWindowX11 *
gst_gl_window_x11_new (GstGLDisplay * display)
{
GstGLWindowX11 *window = NULL;
if ((display->type & GST_GL_DISPLAY_TYPE_X11) == GST_GL_DISPLAY_TYPE_NONE) {
GST_INFO ("Wrong display type %u for this window type %u", display->type,
GST_GL_DISPLAY_TYPE_X11);
return NULL;
}
window = g_object_new (GST_GL_TYPE_WINDOW_X11, NULL);
return window;
}
gboolean
gst_gl_window_x11_open (GstGLWindow * window, GError ** error)
{
GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);
GstGLDisplayX11 *display_x11 = (GstGLDisplayX11 *) window->display;
window_x11->device = XOpenDisplay (display_x11->name);
// window_x11->device = display_x11->display;
if (window_x11->device == NULL) {
g_set_error (error, GST_GL_WINDOW_ERROR,
GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE,
"Failed to connect to X display server");
goto failure;
}
XSynchronize (window_x11->device, FALSE);
GST_LOG ("gl device id: %ld", (gulong) window_x11->device);
window_x11->screen = DefaultScreenOfDisplay (window_x11->device);
window_x11->screen_num = DefaultScreen (window_x11->device);
window_x11->visual =
DefaultVisual (window_x11->device, window_x11->screen_num);
window_x11->root = DefaultRootWindow (window_x11->device);
window_x11->white = XWhitePixel (window_x11->device, window_x11->screen_num);
window_x11->black = XBlackPixel (window_x11->device, window_x11->screen_num);
window_x11->depth = DefaultDepthOfScreen (window_x11->screen);
GST_LOG ("gl root id: %lud", (gulong) window_x11->root);
window_x11->device_width =
DisplayWidth (window_x11->device, window_x11->screen_num);
window_x11->device_height =
DisplayHeight (window_x11->device, window_x11->screen_num);
window_x11->x11_source = x11_event_source_new (window_x11);
window_x11->main_context = g_main_context_new ();
window_x11->loop = g_main_loop_new (window_x11->main_context, FALSE);
g_source_attach (window_x11->x11_source, window_x11->main_context);
window_x11->allow_extra_expose_events = TRUE;
return TRUE;
failure:
return FALSE;
}
gboolean
gst_gl_window_x11_create_window (GstGLWindowX11 * window_x11)
{
XSetWindowAttributes win_attr;
XTextProperty text_property;
XWMHints wm_hints;
unsigned long mask;
const gchar *title = "OpenGL renderer";
Atom wm_atoms[1];
gint x = 0, y = 0, width = 1, height = 1;
if (window_x11->visual_info->visual != window_x11->visual)
GST_LOG ("selected visual is different from the default");
GST_LOG ("visual XID:%d, screen:%d, visualid:%d, depth:%d, class:%d, "
"red_mask:%ld, green_mask:%ld, blue_mask:%ld bpp:%d",
(gint) XVisualIDFromVisual (window_x11->visual_info->visual),
window_x11->visual_info->screen, (gint) window_x11->visual_info->visualid,
window_x11->visual_info->depth, window_x11->visual_info->class,
window_x11->visual_info->red_mask, window_x11->visual_info->green_mask,
window_x11->visual_info->blue_mask,
window_x11->visual_info->bits_per_rgb);
win_attr.event_mask =
StructureNotifyMask | ExposureMask | VisibilityChangeMask;
win_attr.do_not_propagate_mask = NoEventMask;
win_attr.background_pixmap = None;
win_attr.background_pixel = 0;
win_attr.border_pixel = 0;
win_attr.colormap =
XCreateColormap (window_x11->device, window_x11->root,
window_x11->visual_info->visual, AllocNone);
mask = CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask;
window_x11->internal_win_id =
XCreateWindow (window_x11->device,
window_x11->parent_win ? window_x11->parent_win : window_x11->root,
x, y, width, height, 0,
window_x11->visual_info->depth, InputOutput,
window_x11->visual_info->visual, mask, &win_attr);
XSync (window_x11->device, FALSE);
XSetWindowBackgroundPixmap (window_x11->device,
window_x11->internal_win_id, None);
GST_LOG ("gl window id: %lud", (gulong) window_x11->internal_win_id);
GST_LOG ("gl window props: x:%d y:%d", x, y);
wm_atoms[0] = XInternAtom (window_x11->device, "WM_DELETE_WINDOW", True);
if (wm_atoms[0] == None)
GST_DEBUG ("Cannot create WM_DELETE_WINDOW");
XSetWMProtocols (window_x11->device, window_x11->internal_win_id,
wm_atoms, 1);
wm_hints.flags = StateHint;
wm_hints.initial_state = NormalState;
wm_hints.input = False;
XStringListToTextProperty ((char **) &title, 1, &text_property);
XSetWMProperties (window_x11->device, window_x11->internal_win_id,
&text_property, &text_property, 0, 0, NULL, &wm_hints, NULL);
XFree (text_property.value);
return TRUE;
}
void
gst_gl_window_x11_close (GstGLWindow * window)
{
GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);
GstGLDisplay *display = window->display;
XEvent event;
if (window_x11->device) {
/* Avoid BadDrawable Errors... */
if (gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_X11)
XSync (GST_GL_DISPLAY_X11 (display)->display, FALSE);
if (window_x11->internal_win_id)
XUnmapWindow (window_x11->device, window_x11->internal_win_id);
XFree (window_x11->visual_info);
if (window_x11->internal_win_id) {
XReparentWindow (window_x11->device, window_x11->internal_win_id,
window_x11->root, 0, 0);
XDestroyWindow (window_x11->device, window_x11->internal_win_id);
}
XSync (window_x11->device, FALSE);
while (XPending (window_x11->device))
XNextEvent (window_x11->device, &event);
XCloseDisplay (window_x11->device);
GST_DEBUG ("display receiver closed");
}
g_source_destroy (window_x11->x11_source);
g_source_unref (window_x11->x11_source);
window_x11->x11_source = NULL;
g_main_loop_unref (window_x11->loop);
window_x11->loop = NULL;
g_main_context_unref (window_x11->main_context);
window_x11->main_context = NULL;
window_x11->running = FALSE;
}
static void
set_window_handle_cb (gpointer data)
{
GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (data);
XWindowAttributes attr;
XGetWindowAttributes (window_x11->device, window_x11->parent_win, &attr);
XResizeWindow (window_x11->device, window_x11->internal_win_id,
attr.width, attr.height);
XReparentWindow (window_x11->device, window_x11->internal_win_id,
window_x11->parent_win, 0, 0);
XSync (window_x11->device, FALSE);
}
/* Not called by the gl thread */
void
gst_gl_window_x11_set_window_handle (GstGLWindow * window, guintptr id)
{
GstGLWindowX11 *window_x11;
window_x11 = GST_GL_WINDOW_X11 (window);
window_x11->parent_win = (Window) id;
/* The loop may not exist yet because it's created in GstGLWindow::open
* which is only called when going from READY to PAUSED state.
* If no loop then the parent is directly set in XCreateWindow
*/
if (window_x11->loop && g_main_loop_is_running (window_x11->loop)) {
GST_LOG ("set parent window id: %" G_GUINTPTR_FORMAT, id);
gst_gl_window_send_message (window, (GstGLWindowCB) set_window_handle_cb,
window_x11);
}
}
guintptr
gst_gl_window_x11_get_window_handle (GstGLWindow * window)
{
GstGLWindowX11 *window_x11;
window_x11 = GST_GL_WINDOW_X11 (window);
return window_x11->internal_win_id;
}
/* Called in the gl thread */
void
gst_gl_window_x11_draw_unlocked (GstGLWindow * window, guint width,
guint height)
{
GstGLWindowX11 *window_x11;
window_x11 = GST_GL_WINDOW_X11 (window);
if (g_main_loop_is_running (window_x11->loop)
&& window_x11->allow_extra_expose_events) {
if (window->draw) {
GstGLContext *context = gst_gl_window_get_context (window);
GstGLContextClass *context_class = GST_GL_CONTEXT_GET_CLASS (context);
window->draw (window->draw_data);
context_class->swap_buffers (context);
gst_object_unref (context);
}
}
}
struct draw
{
GstGLWindowX11 *window;
guint width, height;
};
static void
draw_cb (gpointer data)
{
struct draw *draw_data = data;
GstGLWindowX11 *window_x11 = draw_data->window;
guint width = draw_data->width;
guint height = draw_data->height;
if (g_main_loop_is_running (window_x11->loop)) {
XWindowAttributes attr;
XGetWindowAttributes (window_x11->device, window_x11->internal_win_id,
&attr);
if (!window_x11->visible) {
if (!window_x11->parent_win) {
attr.width = width;
attr.height = height;
XResizeWindow (window_x11->device, window_x11->internal_win_id,
attr.width, attr.height);
XSync (window_x11->device, FALSE);
}
XMapWindow (window_x11->device, window_x11->internal_win_id);
window_x11->visible = TRUE;
}
if (window_x11->parent_win) {
XWindowAttributes attr_parent;
XGetWindowAttributes (window_x11->device, window_x11->parent_win,
&attr_parent);
if (attr.width != attr_parent.width || attr.height != attr_parent.height) {
XMoveResizeWindow (window_x11->device, window_x11->internal_win_id,
0, 0, attr_parent.width, attr_parent.height);
XSync (window_x11->device, FALSE);
attr.width = attr_parent.width;
attr.height = attr_parent.height;
GST_LOG ("parent resize: %d, %d",
attr_parent.width, attr_parent.height);
}
}
gst_gl_window_x11_draw_unlocked (GST_GL_WINDOW (window_x11), width, height);
}
}
/* Not called by the gl thread */
void
gst_gl_window_x11_draw (GstGLWindow * window, guint width, guint height)
{
struct draw draw_data;
draw_data.window = GST_GL_WINDOW_X11 (window);
draw_data.width = width;
draw_data.height = height;
/* Call from the GL thread */
gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, &draw_data);
}
void
gst_gl_window_x11_run (GstGLWindow * window)
{
GstGLWindowX11 *window_x11;
window_x11 = GST_GL_WINDOW_X11 (window);
g_main_loop_run (window_x11->loop);
}
static inline const gchar *
event_type_to_string (guint type)
{
switch (type) {
case CreateNotify:
return "CreateNotify";
case ConfigureNotify:
return "ConfigureNotify";
case DestroyNotify:
return "DestroyNotify";
case MapNotify:
return "MapNotify";
case UnmapNotify:
return "UnmapNotify";
case Expose:
return "Expose";
case VisibilityNotify:
return "VisibilityNotify";
case PropertyNotify:
return "PropertyNotify";
case SelectionClear:
return "SelectionClear";
case SelectionNotify:
return "SelectionNotify";
case SelectionRequest:
return "SelectionRequest";
case ClientMessage:
return "ClientMessage";
default:
return "unknown";
}
}
gboolean
gst_gl_window_x11_handle_event (GstGLWindowX11 * window_x11)
{
GstGLContext *context;
GstGLContextClass *context_class;
GstGLWindow *window;
gboolean ret = TRUE;
window = GST_GL_WINDOW (window_x11);
if (g_main_loop_is_running (window_x11->loop)
&& XPending (window_x11->device)) {
XEvent event;
/* XSendEvent (which are called in other threads) are done from another display structure */
XNextEvent (window_x11->device, &event);
window_x11->allow_extra_expose_events = XPending (window_x11->device) <= 2;
GST_LOG ("got event %s", event_type_to_string (event.type));
switch (event.type) {
case ClientMessage:
{
Atom wm_delete =
XInternAtom (window_x11->device, "WM_DELETE_WINDOW", True);
if (wm_delete == None)
GST_DEBUG ("Cannot create WM_DELETE_WINDOW");
/* User clicked on the cross */
if (wm_delete != None && (Atom) event.xclient.data.l[0] == wm_delete) {
GST_DEBUG ("Close %lud", (gulong) window_x11->internal_win_id);
if (window->close)
window->close (window->close_data);
ret = FALSE;
}
break;
}
case CreateNotify:
case ConfigureNotify:
{
if (window->resize)
window->resize (window->resize_data, event.xconfigure.width,
event.xconfigure.height);
break;
}
case DestroyNotify:
break;
case Expose:
/* non-zero means that other Expose follows
* so just wait for the last one
* in theory we should not receive non-zero because
* we have no sub areas here but just in case */
if (event.xexpose.count != 0) {
break;
}
/* We need to redraw on expose */
if (window->draw) {
context = gst_gl_window_get_context (window);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
window->draw (window->draw_data);
context_class->swap_buffers (context);
gst_object_unref (context);
}
break;
case VisibilityNotify:
/* actually nothing to do here */
break;
default:
GST_DEBUG ("unknown XEvent type: %u", event.type);
break;
} // switch
} // while running
return ret;
}
/* Not called by the gl thread */
void
gst_gl_window_x11_quit (GstGLWindow * window)
{
GstGLWindowX11 *window_x11;
window_x11 = GST_GL_WINDOW_X11 (window);
GST_LOG ("sending quit");
g_main_loop_quit (window_x11->loop);
GST_LOG ("quit sent");
}
typedef struct _GstGLMessage
{
GstGLWindowCB callback;
gpointer data;
GDestroyNotify destroy;
} GstGLMessage;
static gboolean
_run_message (GstGLMessage * message)
{
if (message->callback)
message->callback (message->data);
if (message->destroy)
message->destroy (message->data);
g_slice_free (GstGLMessage, message);
return FALSE;
}
void
gst_gl_window_x11_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy)
{
GstGLWindowX11 *window_x11;
GstGLMessage *message;
window_x11 = GST_GL_WINDOW_X11 (window);
message = g_slice_new (GstGLMessage);
message->callback = callback;
message->data = data;
message->destroy = destroy;
g_main_context_invoke (window_x11->main_context, (GSourceFunc) _run_message,
message);
}
static int
error_handler (Display * xdpy, XErrorEvent * error)
{
TrappedErrorCode = error->error_code;
return 0;
}
/**
* gst_gl_window_x11_trap_x_errors:
*
* Traps every X error until gst_gl_window_x11_untrap_x_errors() is called.
*/
void
gst_gl_window_x11_trap_x_errors (void)
{
TrappedErrorCode = 0;
old_error_handler = XSetErrorHandler (error_handler);
}
/**
* gst_gl_window_x11_untrap_x_errors:
*
* Removes the X error trap and returns the current status.
*
* Return value: the trapped error code, or 0 for success
*/
gint
gst_gl_window_x11_untrap_x_errors (void)
{
XSetErrorHandler (old_error_handler);
return TrappedErrorCode;
}
guintptr
gst_gl_window_x11_get_display (GstGLWindow * window)
{
GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);
return (guintptr) window_x11->device;
}