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mutter/src/backends/meta-screen-cast-monitor-stream-src.c
Jonas Ådahl 29ec2d2e20 screen-cast/src: Never dequeue pw_buffer's we refuse to record to 
The DMA buffer paths vs MemFd paths differ slightly in when content is
recorded. This was in some places done by trying to record but bail if
the dequeued buffer had the wrong type. This is problematic for two
reasons: we'd update the timestamp even if we refused to record, making
the follow-up attempt fail, and we'd dequeue and queue buffers that
didn't get any content, meaning the receiving end would see empty
buffers potentially with only cursor updates.

Fix this by keeping track if a stream is DMA buffer able or not, and
don't attempt to record at all in the places we would previously require
DMA buffers. This avoids both issues: we don't dequeue/queue pw_buffers
that we refuse to record to, and we won't update the recorded timestamp
when we didn't intend to record to begin with.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2783
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2987>
2023-05-04 13:00:07 +00:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2017 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
*/
#include "config.h"
#include "backends/meta-screen-cast-monitor-stream-src.h"
#include <spa/buffer/meta.h>
#include "backends/meta-backend-private.h"
#include "backends/meta-cursor-tracker-private.h"
#include "backends/meta-logical-monitor.h"
#include "backends/meta-monitor.h"
#include "backends/meta-screen-cast-monitor-stream.h"
#include "backends/meta-screen-cast-session.h"
#include "backends/meta-stage-private.h"
#include "clutter/clutter.h"
#include "clutter/clutter-mutter.h"
#include "core/boxes-private.h"
struct _MetaScreenCastMonitorStreamSrc
{
MetaScreenCastStreamSrc parent;
gboolean cursor_bitmap_invalid;
gboolean hw_cursor_inhibited;
GList *watches;
gulong position_invalidated_handler_id;
gulong cursor_changed_handler_id;
gulong stage_prepare_frame_handler_id;
guint maybe_record_idle_id;
};
static void
hw_cursor_inhibitor_iface_init (MetaHwCursorInhibitorInterface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaScreenCastMonitorStreamSrc,
meta_screen_cast_monitor_stream_src,
META_TYPE_SCREEN_CAST_STREAM_SRC,
G_IMPLEMENT_INTERFACE (META_TYPE_HW_CURSOR_INHIBITOR,
hw_cursor_inhibitor_iface_init))
static MetaBackend *
get_backend (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastSession *session = meta_screen_cast_stream_get_session (stream);
MetaScreenCast *screen_cast =
meta_screen_cast_session_get_screen_cast (session);
return meta_screen_cast_get_backend (screen_cast);
}
static ClutterStage *
get_stage (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaScreenCastStreamSrc *src;
MetaScreenCastStream *stream;
MetaScreenCastMonitorStream *monitor_stream;
src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
stream = meta_screen_cast_stream_src_get_stream (src);
monitor_stream = META_SCREEN_CAST_MONITOR_STREAM (stream);
return meta_screen_cast_monitor_stream_get_stage (monitor_stream);
}
static MetaMonitor *
get_monitor (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaScreenCastStreamSrc *src;
MetaScreenCastStream *stream;
MetaScreenCastMonitorStream *monitor_stream;
src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
stream = meta_screen_cast_stream_src_get_stream (src);
monitor_stream = META_SCREEN_CAST_MONITOR_STREAM (stream);
return meta_screen_cast_monitor_stream_get_monitor (monitor_stream);
}
static gboolean
meta_screen_cast_monitor_stream_src_get_specs (MetaScreenCastStreamSrc *src,
int *width,
int *height,
float *frame_rate)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaBackend *backend = get_backend (monitor_src);
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
float scale;
MetaMonitorMode *mode;
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
mode = meta_monitor_get_current_mode (monitor);
if (meta_backend_is_stage_views_scaled (backend))
scale = logical_monitor->scale;
else
scale = 1.0;
*width = (int) roundf (logical_monitor->rect.width * scale);
*height = (int) roundf (logical_monitor->rect.height * scale);
*frame_rate = meta_monitor_mode_get_refresh_rate (mode);
return TRUE;
}
static gboolean
maybe_record_frame_on_idle (gpointer user_data)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (user_data);
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
MetaScreenCastRecordFlag flags;
monitor_src->maybe_record_idle_id = 0;
flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
meta_screen_cast_stream_src_maybe_record_frame (src, flags, NULL);
return G_SOURCE_REMOVE;
}
static void
stage_painted (MetaStage *stage,
ClutterStageView *view,
ClutterPaintContext *paint_context,
ClutterFrame *frame,
gpointer user_data)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (user_data);
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
MetaScreenCastRecordResult record_result =
META_SCREEN_CAST_RECORD_RESULT_RECORDED_NOTHING;
int64_t presentation_time_us;
if (monitor_src->maybe_record_idle_id)
return;
if (!clutter_frame_get_target_presentation_time (frame, &presentation_time_us))
presentation_time_us = g_get_monotonic_time ();
if (meta_screen_cast_stream_src_uses_dma_bufs (src))
{
MetaScreenCastRecordFlag flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
record_result =
meta_screen_cast_stream_src_maybe_record_frame_with_timestamp (src,
flags,
NULL,
presentation_time_us);
}
if (!(record_result & META_SCREEN_CAST_RECORD_RESULT_RECORDED_FRAME))
{
monitor_src->maybe_record_idle_id = g_idle_add (maybe_record_frame_on_idle,
src);
g_source_set_name_by_id (monitor_src->maybe_record_idle_id,
"[mutter] maybe_record_frame_on_idle [monitor-src]");
}
}
static void
before_stage_painted (MetaStage *stage,
ClutterStageView *view,
ClutterPaintContext *paint_context,
ClutterFrame *frame,
gpointer user_data)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (user_data);
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
MetaScreenCastRecordFlag flags;
int64_t presentation_time_us;
if (monitor_src->maybe_record_idle_id)
return;
if (!meta_screen_cast_stream_src_uses_dma_bufs (src))
return;
if (!clutter_stage_view_peek_scanout (view))
return;
if (!clutter_frame_get_target_presentation_time (frame, &presentation_time_us))
presentation_time_us = g_get_monotonic_time ();
flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
meta_screen_cast_stream_src_maybe_record_frame_with_timestamp (src,
flags,
NULL,
presentation_time_us);
}
static gboolean
is_cursor_in_stream (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaBackend *backend = get_backend (monitor_src);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
MetaRectangle logical_monitor_layout;
graphene_rect_t logical_monitor_rect;
MetaCursorSprite *cursor_sprite;
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
logical_monitor_layout = meta_logical_monitor_get_layout (logical_monitor);
logical_monitor_rect =
meta_rectangle_to_graphene_rect (&logical_monitor_layout);
cursor_sprite = meta_cursor_renderer_get_cursor (cursor_renderer);
if (cursor_sprite)
{
graphene_rect_t cursor_rect;
cursor_rect = meta_cursor_renderer_calculate_rect (cursor_renderer,
cursor_sprite);
return graphene_rect_intersection (&cursor_rect,
&logical_monitor_rect,
NULL);
}
else
{
MetaCursorTracker *cursor_tracker =
meta_backend_get_cursor_tracker (backend);
graphene_point_t cursor_position;
meta_cursor_tracker_get_pointer (cursor_tracker, &cursor_position, NULL);
return graphene_rect_contains_point (&logical_monitor_rect,
&cursor_position);
}
}
static gboolean
is_redraw_queued (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaBackend *backend = get_backend (monitor_src);
MetaRenderer *renderer = meta_backend_get_renderer (backend);
ClutterStage *stage = get_stage (monitor_src);
MetaMonitor *monitor = get_monitor (monitor_src);
g_autoptr (GList) views = NULL;
GList *l;
views = meta_renderer_get_views_for_monitor (renderer, monitor);
for (l = views; l; l = l->next)
{
MetaRendererView *view = l->data;
if (clutter_stage_is_redraw_queued_on_view (stage, CLUTTER_STAGE_VIEW (view)))
return TRUE;
}
return FALSE;
}
static void
sync_cursor_state (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
MetaScreenCastRecordFlag flags;
if (is_redraw_queued (monitor_src))
return;
if (meta_screen_cast_stream_src_pending_follow_up_frame (src))
return;
flags = META_SCREEN_CAST_RECORD_FLAG_CURSOR_ONLY;
meta_screen_cast_stream_src_maybe_record_frame (src, flags, NULL);
}
static void
pointer_position_invalidated (MetaCursorTracker *cursor_tracker,
MetaScreenCastMonitorStreamSrc *monitor_src)
{
ClutterStage *stage = get_stage (monitor_src);
clutter_stage_schedule_update (stage);
}
static void
cursor_changed (MetaCursorTracker *cursor_tracker,
MetaScreenCastMonitorStreamSrc *monitor_src)
{
monitor_src->cursor_bitmap_invalid = TRUE;
sync_cursor_state (monitor_src);
}
static void
on_prepare_frame (ClutterStage *stage,
ClutterStageView *stage_view,
ClutterFrame *frame,
MetaScreenCastMonitorStreamSrc *monitor_src)
{
sync_cursor_state (monitor_src);
}
static void
inhibit_hw_cursor (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaHwCursorInhibitor *inhibitor;
MetaBackend *backend;
g_return_if_fail (!monitor_src->hw_cursor_inhibited);
backend = get_backend (monitor_src);
inhibitor = META_HW_CURSOR_INHIBITOR (monitor_src);
meta_backend_add_hw_cursor_inhibitor (backend, inhibitor);
monitor_src->hw_cursor_inhibited = TRUE;
}
static void
uninhibit_hw_cursor (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaHwCursorInhibitor *inhibitor;
MetaBackend *backend;
g_return_if_fail (monitor_src->hw_cursor_inhibited);
backend = get_backend (monitor_src);
inhibitor = META_HW_CURSOR_INHIBITOR (monitor_src);
meta_backend_remove_hw_cursor_inhibitor (backend, inhibitor);
monitor_src->hw_cursor_inhibited = FALSE;
}
static void
add_view_watches (MetaScreenCastMonitorStreamSrc *monitor_src,
MetaStageWatchPhase watch_phase,
MetaStageWatchFunc callback)
{
MetaBackend *backend = get_backend (monitor_src);
MetaRenderer *renderer = meta_backend_get_renderer (backend);
ClutterStage *stage;
MetaStage *meta_stage;
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
MetaRectangle logical_monitor_layout;
GList *l;
stage = get_stage (monitor_src);
meta_stage = META_STAGE (stage);
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
logical_monitor_layout = meta_logical_monitor_get_layout (logical_monitor);
for (l = meta_renderer_get_views (renderer); l; l = l->next)
{
MetaRendererView *view = l->data;
MetaRectangle view_layout;
clutter_stage_view_get_layout (CLUTTER_STAGE_VIEW (view), &view_layout);
if (meta_rectangle_overlap (&logical_monitor_layout, &view_layout))
{
MetaStageWatch *watch;
watch = meta_stage_watch_view (meta_stage,
CLUTTER_STAGE_VIEW (view),
watch_phase,
callback,
monitor_src);
monitor_src->watches = g_list_prepend (monitor_src->watches, watch);
}
}
}
static void
reattach_watches (MetaScreenCastMonitorStreamSrc *monitor_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (monitor_src);
MetaScreenCastStream *stream;
ClutterStage *stage;
GList *l;
stream = meta_screen_cast_stream_src_get_stream (src);
stage = get_stage (monitor_src);
for (l = monitor_src->watches; l; l = l->next)
meta_stage_remove_watch (META_STAGE (stage), l->data);
g_clear_pointer (&monitor_src->watches, g_list_free);
add_view_watches (monitor_src,
META_STAGE_WATCH_BEFORE_PAINT,
before_stage_painted);
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
add_view_watches (monitor_src,
META_STAGE_WATCH_AFTER_ACTOR_PAINT,
stage_painted);
break;
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
add_view_watches (monitor_src,
META_STAGE_WATCH_AFTER_PAINT,
stage_painted);
break;
}
}
static void
on_monitors_changed (MetaMonitorManager *monitor_manager,
MetaScreenCastMonitorStreamSrc *monitor_src)
{
reattach_watches (monitor_src);
}
static void
meta_screen_cast_monitor_stream_src_enable (MetaScreenCastStreamSrc *src)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaBackend *backend = get_backend (monitor_src);
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
ClutterStage *stage = get_stage (monitor_src);
MetaScreenCastStream *stream;
stream = meta_screen_cast_stream_src_get_stream (src);
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
monitor_src->position_invalidated_handler_id =
g_signal_connect_after (cursor_tracker, "position-invalidated",
G_CALLBACK (pointer_position_invalidated),
monitor_src);
monitor_src->cursor_changed_handler_id =
g_signal_connect_after (cursor_tracker, "cursor-changed",
G_CALLBACK (cursor_changed),
monitor_src);
monitor_src->stage_prepare_frame_handler_id =
g_signal_connect_after (stage, "prepare-frame",
G_CALLBACK (on_prepare_frame),
monitor_src);
meta_cursor_tracker_track_position (cursor_tracker);
break;
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
break;
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
inhibit_hw_cursor (monitor_src);
meta_cursor_tracker_track_position (cursor_tracker);
break;
}
reattach_watches (monitor_src);
g_signal_connect_object (monitor_manager, "monitors-changed-internal",
G_CALLBACK (on_monitors_changed),
monitor_src, 0);
clutter_actor_queue_redraw (CLUTTER_ACTOR (get_stage (monitor_src)));
}
static void
meta_screen_cast_monitor_stream_src_disable (MetaScreenCastStreamSrc *src)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaBackend *backend = get_backend (monitor_src);
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
ClutterStage *stage;
MetaStage *meta_stage;
GList *l;
stage = get_stage (monitor_src);
meta_stage = META_STAGE (stage);
for (l = monitor_src->watches; l; l = l->next)
{
MetaStageWatch *watch = l->data;
meta_stage_remove_watch (meta_stage, watch);
}
g_clear_pointer (&monitor_src->watches, g_list_free);
if (monitor_src->hw_cursor_inhibited)
uninhibit_hw_cursor (monitor_src);
g_clear_signal_handler (&monitor_src->position_invalidated_handler_id,
cursor_tracker);
g_clear_signal_handler (&monitor_src->cursor_changed_handler_id,
cursor_tracker);
g_clear_signal_handler (&monitor_src->stage_prepare_frame_handler_id,
stage);
g_clear_handle_id (&monitor_src->maybe_record_idle_id, g_source_remove);
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
meta_cursor_tracker_untrack_position (cursor_tracker);
break;
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
break;
}
}
static gboolean
meta_screen_cast_monitor_stream_src_record_to_buffer (MetaScreenCastStreamSrc *src,
int width,
int height,
int stride,
uint8_t *data,
GError **error)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaBackend *backend = get_backend (monitor_src);
ClutterStage *stage;
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
float scale;
ClutterPaintFlag paint_flags = CLUTTER_PAINT_FLAG_CLEAR;
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
stage = get_stage (monitor_src);
if (meta_backend_is_stage_views_scaled (backend))
scale = meta_logical_monitor_get_scale (logical_monitor);
else
scale = 1.0;
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
paint_flags |= CLUTTER_PAINT_FLAG_NO_CURSORS;
break;
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
paint_flags |= CLUTTER_PAINT_FLAG_FORCE_CURSORS;
break;
}
if (!clutter_stage_paint_to_buffer (stage, &logical_monitor->rect, scale,
data,
stride,
CLUTTER_CAIRO_FORMAT_ARGB32,
paint_flags,
error))
return FALSE;
return TRUE;
}
static gboolean
meta_screen_cast_monitor_stream_src_record_to_framebuffer (MetaScreenCastStreamSrc *src,
CoglFramebuffer *framebuffer,
GError **error)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaBackend *backend = get_backend (monitor_src);
ClutterStage *stage = get_stage (monitor_src);
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
MetaRectangle logical_monitor_layout;
float view_scale;
ClutterPaintFlag paint_flags = CLUTTER_PAINT_FLAG_CLEAR;
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
logical_monitor_layout = meta_logical_monitor_get_layout (logical_monitor);
if (meta_backend_is_stage_views_scaled (backend))
view_scale = meta_logical_monitor_get_scale (logical_monitor);
else
view_scale = 1.0;
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
paint_flags |= CLUTTER_PAINT_FLAG_NO_CURSORS;
break;
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
paint_flags |= CLUTTER_PAINT_FLAG_FORCE_CURSORS;
break;
}
clutter_stage_paint_to_framebuffer (stage,
framebuffer,
&logical_monitor_layout,
view_scale,
paint_flags);
cogl_framebuffer_flush (framebuffer);
return TRUE;
}
static void
meta_screen_cast_monitor_stream_record_follow_up (MetaScreenCastStreamSrc *src)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaBackend *backend = get_backend (monitor_src);
MetaRenderer *renderer = meta_backend_get_renderer (backend);
ClutterStage *stage = get_stage (monitor_src);
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
MetaRectangle logical_monitor_layout;
GList *l;
g_clear_handle_id (&monitor_src->maybe_record_idle_id, g_source_remove);
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
logical_monitor_layout = meta_logical_monitor_get_layout (logical_monitor);
for (l = meta_renderer_get_views (renderer); l; l = l->next)
{
MetaRendererView *view = l->data;
MetaRectangle view_layout;
MetaRectangle damage;
clutter_stage_view_get_layout (CLUTTER_STAGE_VIEW (view), &view_layout);
if (!meta_rectangle_overlap (&logical_monitor_layout, &view_layout))
continue;
damage = (cairo_rectangle_int_t) {
.x = view_layout.x,
.y = view_layout.y,
.width = 1,
.height = 1,
};
clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stage), &damage);
}
}
static void
meta_screen_cast_monitor_stream_src_set_cursor_metadata (MetaScreenCastStreamSrc *src,
struct spa_meta_cursor *spa_meta_cursor)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (src);
MetaBackend *backend = get_backend (monitor_src);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MetaCursorTracker *cursor_tracker =
meta_backend_get_cursor_tracker (backend);
MetaCursorSprite *cursor_sprite;
MetaMonitor *monitor;
MetaLogicalMonitor *logical_monitor;
MetaRectangle logical_monitor_layout;
graphene_rect_t logical_monitor_rect;
float view_scale;
graphene_point_t cursor_position;
int x, y;
cursor_sprite = meta_cursor_renderer_get_cursor (cursor_renderer);
if (!meta_cursor_tracker_get_pointer_visible (cursor_tracker) ||
!is_cursor_in_stream (monitor_src))
{
meta_screen_cast_stream_src_unset_cursor_metadata (src,
spa_meta_cursor);
return;
}
monitor = get_monitor (monitor_src);
logical_monitor = meta_monitor_get_logical_monitor (monitor);
logical_monitor_layout = meta_logical_monitor_get_layout (logical_monitor);
logical_monitor_rect =
meta_rectangle_to_graphene_rect (&logical_monitor_layout);
if (meta_backend_is_stage_views_scaled (backend))
view_scale = meta_logical_monitor_get_scale (logical_monitor);
else
view_scale = 1.0;
meta_cursor_tracker_get_pointer (cursor_tracker, &cursor_position, NULL);
cursor_position.x -= logical_monitor_rect.origin.x;
cursor_position.y -= logical_monitor_rect.origin.y;
cursor_position.x *= view_scale;
cursor_position.y *= view_scale;
x = (int) roundf (cursor_position.x);
y = (int) roundf (cursor_position.y);
if (monitor_src->cursor_bitmap_invalid)
{
if (cursor_sprite)
{
float cursor_scale;
float scale;
MetaMonitorTransform transform;
cursor_scale = meta_cursor_sprite_get_texture_scale (cursor_sprite);
scale = view_scale * cursor_scale;
transform = meta_cursor_sprite_get_texture_transform (cursor_sprite);
meta_screen_cast_stream_src_set_cursor_sprite_metadata (src,
spa_meta_cursor,
cursor_sprite,
x, y,
scale,
transform);
}
else
{
meta_screen_cast_stream_src_set_empty_cursor_sprite_metadata (src,
spa_meta_cursor,
x, y);
}
monitor_src->cursor_bitmap_invalid = FALSE;
}
else
{
meta_screen_cast_stream_src_set_cursor_position_metadata (src,
spa_meta_cursor,
x, y);
}
}
static gboolean
meta_screen_cast_monitor_stream_src_is_cursor_inhibited (MetaHwCursorInhibitor *inhibitor)
{
MetaScreenCastMonitorStreamSrc *monitor_src =
META_SCREEN_CAST_MONITOR_STREAM_SRC (inhibitor);
return is_cursor_in_stream (monitor_src);
}
static void
hw_cursor_inhibitor_iface_init (MetaHwCursorInhibitorInterface *iface)
{
iface->is_cursor_inhibited =
meta_screen_cast_monitor_stream_src_is_cursor_inhibited;
}
MetaScreenCastMonitorStreamSrc *
meta_screen_cast_monitor_stream_src_new (MetaScreenCastMonitorStream *monitor_stream,
GError **error)
{
return g_initable_new (META_TYPE_SCREEN_CAST_MONITOR_STREAM_SRC, NULL, error,
"stream", monitor_stream,
NULL);
}
static void
meta_screen_cast_monitor_stream_src_init (MetaScreenCastMonitorStreamSrc *monitor_src)
{
monitor_src->cursor_bitmap_invalid = TRUE;
}
static void
meta_screen_cast_monitor_stream_src_class_init (MetaScreenCastMonitorStreamSrcClass *klass)
{
MetaScreenCastStreamSrcClass *src_class =
META_SCREEN_CAST_STREAM_SRC_CLASS (klass);
src_class->get_specs = meta_screen_cast_monitor_stream_src_get_specs;
src_class->enable = meta_screen_cast_monitor_stream_src_enable;
src_class->disable = meta_screen_cast_monitor_stream_src_disable;
src_class->record_to_buffer =
meta_screen_cast_monitor_stream_src_record_to_buffer;
src_class->record_to_framebuffer =
meta_screen_cast_monitor_stream_src_record_to_framebuffer;
src_class->record_follow_up =
meta_screen_cast_monitor_stream_record_follow_up;
src_class->set_cursor_metadata =
meta_screen_cast_monitor_stream_src_set_cursor_metadata;
}
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