/*
* Copyright (C) 2020 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, see .
*
*/
#include "config.h"
#include "backends/meta-screen-cast-area-stream-src.h"
#include
#include "backends/meta-backend-private.h"
#include "backends/meta-cursor-tracker-private.h"
#include "backends/meta-dbus-session-manager.h"
#include "backends/meta-screen-cast-area-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 _MetaScreenCastAreaStreamSrc
{
MetaScreenCastStreamSrc parent;
gboolean cursor_bitmap_invalid;
gboolean hw_cursor_inhibited;
GList *watches;
gulong position_invalidated_handler_id;
gulong cursor_changed_handler_id;
gulong prepare_frame_handler_id;
guint maybe_record_idle_id;
};
static void
hw_cursor_inhibitor_iface_init (MetaHwCursorInhibitorInterface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaScreenCastAreaStreamSrc,
meta_screen_cast_area_stream_src,
META_TYPE_SCREEN_CAST_STREAM_SRC,
G_IMPLEMENT_INTERFACE (META_TYPE_HW_CURSOR_INHIBITOR,
hw_cursor_inhibitor_iface_init))
static ClutterStage *
get_stage (MetaScreenCastAreaStreamSrc *area_src)
{
MetaScreenCastStreamSrc *src;
MetaScreenCastStream *stream;
MetaScreenCastAreaStream *area_stream;
src = META_SCREEN_CAST_STREAM_SRC (area_src);
stream = meta_screen_cast_stream_src_get_stream (src);
area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
return meta_screen_cast_area_stream_get_stage (area_stream);
}
static MetaBackend *
get_backend (MetaScreenCastAreaStreamSrc *area_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_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 gboolean
meta_screen_cast_area_stream_src_get_specs (MetaScreenCastStreamSrc *src,
int *width,
int *height,
float *frame_rate)
{
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
MtkRectangle *area;
float scale;
area = meta_screen_cast_area_stream_get_area (area_stream);
scale = meta_screen_cast_area_stream_get_scale (area_stream);
*width = (int) roundf (area->width * scale);
*height = (int) roundf (area->height * scale);
*frame_rate = 60.0;
return TRUE;
}
static gboolean
is_cursor_in_stream (MetaScreenCastAreaStreamSrc *area_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
MetaBackend *backend = get_backend (area_src);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MtkRectangle *area;
graphene_rect_t area_rect;
MetaCursorSprite *cursor_sprite;
area = meta_screen_cast_area_stream_get_area (area_stream);
area_rect = mtk_rectangle_to_graphene_rect (area);
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, &area_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 (&area_rect, &cursor_position);
}
}
static gboolean
is_redraw_queued (MetaScreenCastAreaStreamSrc *area_src)
{
ClutterStage *stage = get_stage (area_src);
GList *l;
for (l = clutter_stage_peek_stage_views (stage); l; l = l->next)
{
ClutterStageView *view = l->data;
if (clutter_stage_is_redraw_queued_on_view (stage, view))
return TRUE;
}
return FALSE;
}
static void
sync_cursor_state (MetaScreenCastAreaStreamSrc *area_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
MetaScreenCastRecordFlag flags;
if (is_redraw_queued (area_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,
MetaScreenCastAreaStreamSrc *area_src)
{
ClutterStage *stage = get_stage (area_src);
clutter_stage_schedule_update (stage);
}
static void
cursor_changed (MetaCursorTracker *cursor_tracker,
MetaScreenCastAreaStreamSrc *area_src)
{
area_src->cursor_bitmap_invalid = TRUE;
sync_cursor_state (area_src);
}
static void
on_prepare_frame (ClutterStage *stage,
ClutterStageView *stage_view,
ClutterFrame *frame,
MetaScreenCastAreaStreamSrc *area_src)
{
sync_cursor_state (area_src);
}
static void
inhibit_hw_cursor (MetaScreenCastAreaStreamSrc *area_src)
{
MetaHwCursorInhibitor *inhibitor;
MetaBackend *backend;
g_return_if_fail (!area_src->hw_cursor_inhibited);
backend = get_backend (area_src);
inhibitor = META_HW_CURSOR_INHIBITOR (area_src);
meta_backend_add_hw_cursor_inhibitor (backend, inhibitor);
area_src->hw_cursor_inhibited = TRUE;
}
static void
uninhibit_hw_cursor (MetaScreenCastAreaStreamSrc *area_src)
{
MetaHwCursorInhibitor *inhibitor;
MetaBackend *backend;
g_return_if_fail (area_src->hw_cursor_inhibited);
backend = get_backend (area_src);
inhibitor = META_HW_CURSOR_INHIBITOR (area_src);
meta_backend_remove_hw_cursor_inhibitor (backend, inhibitor);
area_src->hw_cursor_inhibited = FALSE;
}
static gboolean
maybe_record_frame_on_idle (gpointer user_data)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (user_data);
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
MetaScreenCastRecordFlag flags;
area_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
before_stage_painted (MetaStage *stage,
ClutterStageView *view,
const cairo_region_t *redraw_clip,
ClutterFrame *frame,
gpointer user_data)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (user_data);
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
if (area_src->maybe_record_idle_id)
return;
if (!clutter_stage_view_peek_scanout (view))
return;
area_src->maybe_record_idle_id = g_idle_add (maybe_record_frame_on_idle, src);
}
static void
stage_painted (MetaStage *stage,
ClutterStageView *view,
const cairo_region_t *redraw_clip,
ClutterFrame *frame,
gpointer user_data)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (user_data);
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
MtkRectangle *area;
if (area_src->maybe_record_idle_id)
return;
area = meta_screen_cast_area_stream_get_area (area_stream);
if (redraw_clip)
{
switch (cairo_region_contains_rectangle (redraw_clip, area))
{
case CAIRO_REGION_OVERLAP_IN:
case CAIRO_REGION_OVERLAP_PART:
break;
case CAIRO_REGION_OVERLAP_OUT:
return;
}
}
area_src->maybe_record_idle_id = g_idle_add (maybe_record_frame_on_idle, src);
}
static void
add_view_painted_watches (MetaScreenCastAreaStreamSrc *area_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (area_src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
MetaBackend *backend = get_backend (area_src);
MetaRenderer *renderer = meta_backend_get_renderer (backend);
ClutterStage *stage;
MetaStage *meta_stage;
MtkRectangle *area;
GList *l;
stage = get_stage (area_src);
meta_stage = META_STAGE (stage);
area = meta_screen_cast_area_stream_get_area (area_stream);
for (l = meta_renderer_get_views (renderer); l; l = l->next)
{
MetaRendererView *view = l->data;
MtkRectangle view_layout;
clutter_stage_view_get_layout (CLUTTER_STAGE_VIEW (view), &view_layout);
if (mtk_rectangle_overlap (area, &view_layout))
{
MetaStageWatch *watch;
watch = meta_stage_watch_view (meta_stage,
CLUTTER_STAGE_VIEW (view),
META_STAGE_WATCH_BEFORE_PAINT,
before_stage_painted,
area_src);
area_src->watches = g_list_prepend (area_src->watches, watch);
watch = meta_stage_watch_view (meta_stage,
CLUTTER_STAGE_VIEW (view),
META_STAGE_WATCH_AFTER_ACTOR_PAINT,
stage_painted,
area_src);
area_src->watches = g_list_prepend (area_src->watches, watch);
}
}
}
static void
on_monitors_changed (MetaMonitorManager *monitor_manager,
MetaScreenCastAreaStreamSrc *area_src)
{
MetaStage *stage = META_STAGE (get_stage (area_src));
GList *l;
for (l = area_src->watches; l; l = l->next)
meta_stage_remove_watch (stage, l->data);
g_clear_pointer (&area_src->watches, g_list_free);
add_view_painted_watches (area_src);
}
static void
meta_screen_cast_area_stream_src_enable (MetaScreenCastStreamSrc *src)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (src);
MetaBackend *backend = get_backend (area_src);
MetaMonitorManager *monitor_manager =
meta_backend_get_monitor_manager (backend);
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
ClutterStage *stage;
MetaScreenCastStream *stream;
stream = meta_screen_cast_stream_src_get_stream (src);
stage = get_stage (area_src);
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
area_src->position_invalidated_handler_id =
g_signal_connect_after (cursor_tracker, "position-invalidated",
G_CALLBACK (pointer_position_invalidated),
area_src);
area_src->cursor_changed_handler_id =
g_signal_connect_after (cursor_tracker, "cursor-changed",
G_CALLBACK (cursor_changed),
area_src);
area_src->prepare_frame_handler_id =
g_signal_connect_after (stage, "prepare-frame",
G_CALLBACK (on_prepare_frame),
area_src);
meta_cursor_tracker_track_position (cursor_tracker);
G_GNUC_FALLTHROUGH;
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
add_view_painted_watches (area_src);
break;
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
inhibit_hw_cursor (area_src);
meta_cursor_tracker_track_position (cursor_tracker);
add_view_painted_watches (area_src);
break;
}
g_signal_connect_object (monitor_manager, "monitors-changed-internal",
G_CALLBACK (on_monitors_changed),
area_src, 0);
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
}
static void
meta_screen_cast_area_stream_src_disable (MetaScreenCastStreamSrc *src)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaBackend *backend = get_backend (area_src);
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
ClutterStage *stage;
MetaStage *meta_stage;
GList *l;
stage = get_stage (area_src);
meta_stage = META_STAGE (stage);
for (l = area_src->watches; l; l = l->next)
{
MetaStageWatch *watch = l->data;
meta_stage_remove_watch (meta_stage, watch);
}
g_clear_pointer (&area_src->watches, g_list_free);
if (area_src->hw_cursor_inhibited)
uninhibit_hw_cursor (area_src);
g_clear_signal_handler (&area_src->position_invalidated_handler_id,
cursor_tracker);
g_clear_signal_handler (&area_src->cursor_changed_handler_id,
cursor_tracker);
g_clear_signal_handler (&area_src->prepare_frame_handler_id,
stage);
g_clear_handle_id (&area_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_area_stream_src_record_to_buffer (MetaScreenCastStreamSrc *src,
int width,
int height,
int stride,
uint8_t *data,
GError **error)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
ClutterStage *stage;
MtkRectangle *area;
float scale;
ClutterPaintFlag paint_flags = CLUTTER_PAINT_FLAG_CLEAR;
stage = get_stage (area_src);
area = meta_screen_cast_area_stream_get_area (area_stream);
scale = meta_screen_cast_area_stream_get_scale (area_stream);
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, area, scale,
data,
stride,
CLUTTER_CAIRO_FORMAT_ARGB32,
paint_flags,
error))
return FALSE;
return TRUE;
}
static gboolean
meta_screen_cast_area_stream_src_record_to_framebuffer (MetaScreenCastStreamSrc *src,
CoglFramebuffer *framebuffer,
GError **error)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
MetaBackend *backend = get_backend (area_src);
ClutterStage *stage;
MtkRectangle *area;
float scale;
ClutterPaintFlag paint_flags = CLUTTER_PAINT_FLAG_CLEAR;
stage = CLUTTER_STAGE (meta_backend_get_stage (backend));
area = meta_screen_cast_area_stream_get_area (area_stream);
scale = meta_screen_cast_area_stream_get_scale (area_stream);
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,
area, scale,
paint_flags);
cogl_framebuffer_flush (framebuffer);
return TRUE;
}
static void
meta_screen_cast_area_stream_record_follow_up (MetaScreenCastStreamSrc *src)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (src);
MetaScreenCastRecordFlag flags;
g_clear_handle_id (&area_src->maybe_record_idle_id, g_source_remove);
flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
meta_screen_cast_stream_src_maybe_record_frame (src, flags, NULL);
}
static void
meta_screen_cast_area_stream_src_set_cursor_metadata (MetaScreenCastStreamSrc *src,
struct spa_meta_cursor *spa_meta_cursor)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaScreenCastAreaStream *area_stream = META_SCREEN_CAST_AREA_STREAM (stream);
MetaBackend *backend = get_backend (area_src);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MetaCursorTracker *cursor_tracker =
meta_backend_get_cursor_tracker (backend);
MetaCursorSprite *cursor_sprite;
MtkRectangle *area;
float 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 (area_src))
{
meta_screen_cast_stream_src_unset_cursor_metadata (src,
spa_meta_cursor);
return;
}
area = meta_screen_cast_area_stream_get_area (area_stream);
scale = meta_screen_cast_area_stream_get_scale (area_stream);
meta_cursor_tracker_get_pointer (cursor_tracker, &cursor_position, NULL);
cursor_position.x -= area->x;
cursor_position.y -= area->y;
cursor_position.x *= scale;
cursor_position.y *= scale;
x = (int) roundf (cursor_position.x);
y = (int) roundf (cursor_position.y);
if (area_src->cursor_bitmap_invalid)
{
if (cursor_sprite)
{
float cursor_scale;
float metadata_scale;
MetaMonitorTransform transform;
cursor_scale = meta_cursor_sprite_get_texture_scale (cursor_sprite);
metadata_scale = 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,
transform,
metadata_scale);
}
else
{
meta_screen_cast_stream_src_set_empty_cursor_sprite_metadata (src,
spa_meta_cursor,
x, y);
}
area_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_area_stream_src_is_cursor_inhibited (MetaHwCursorInhibitor *inhibitor)
{
MetaScreenCastAreaStreamSrc *area_src =
META_SCREEN_CAST_AREA_STREAM_SRC (inhibitor);
return is_cursor_in_stream (area_src);
}
static void
hw_cursor_inhibitor_iface_init (MetaHwCursorInhibitorInterface *iface)
{
iface->is_cursor_inhibited =
meta_screen_cast_area_stream_src_is_cursor_inhibited;
}
MetaScreenCastAreaStreamSrc *
meta_screen_cast_area_stream_src_new (MetaScreenCastAreaStream *area_stream,
GError **error)
{
return g_initable_new (META_TYPE_SCREEN_CAST_AREA_STREAM_SRC, NULL, error,
"stream", area_stream,
NULL);
}
static void
meta_screen_cast_area_stream_src_init (MetaScreenCastAreaStreamSrc *area_src)
{
area_src->cursor_bitmap_invalid = TRUE;
}
static void
meta_screen_cast_area_stream_src_class_init (MetaScreenCastAreaStreamSrcClass *klass)
{
MetaScreenCastStreamSrcClass *src_class =
META_SCREEN_CAST_STREAM_SRC_CLASS (klass);
src_class->get_specs = meta_screen_cast_area_stream_src_get_specs;
src_class->enable = meta_screen_cast_area_stream_src_enable;
src_class->disable = meta_screen_cast_area_stream_src_disable;
src_class->record_to_buffer =
meta_screen_cast_area_stream_src_record_to_buffer;
src_class->record_to_framebuffer =
meta_screen_cast_area_stream_src_record_to_framebuffer;
src_class->record_follow_up =
meta_screen_cast_area_stream_record_follow_up;
src_class->set_cursor_metadata =
meta_screen_cast_area_stream_src_set_cursor_metadata;
}