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mutter-performance-source/src/backends/meta-screen-cast-window-stream-src.c
Georges Basile Stavracas Neto 91bdb2b692 screen-cast/src: Track paint phase 
Track where we are in terms of the paint cycle. Do this through an
enumeration that is passed through the paint vfuncs of screencast
sources.

Right now, this information is not used by any one of the sources,
but next patch will use it to prevent blitting when detached from
the paint cycle.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3406>
2023-11-22 07:55:04 +00:00

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/*
* Copyright (C) 2018 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 <http://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include "backends/meta-screen-cast-window-stream-src.h"
#include "backends/meta-backend-private.h"
#include "backends/meta-cursor-tracker-private.h"
#include "backends/meta-screen-cast-session.h"
#include "backends/meta-screen-cast-window.h"
#include "backends/meta-screen-cast-window-stream.h"
#include "compositor/meta-window-actor-private.h"
struct _MetaScreenCastWindowStreamSrc
{
MetaScreenCastStreamSrc parent;
MetaScreenCastWindow *screen_cast_window;
gulong screen_cast_window_damaged_handler_id;
gulong screen_cast_window_destroyed_handler_id;
gulong position_invalidated_handler_id;
gulong cursor_changed_handler_id;
gulong prepare_frame_handler_id;
gboolean cursor_bitmap_invalid;
};
G_DEFINE_TYPE (MetaScreenCastWindowStreamSrc,
meta_screen_cast_window_stream_src,
META_TYPE_SCREEN_CAST_STREAM_SRC)
static MetaBackend *
get_backend (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_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 (MetaScreenCastWindowStreamSrc *window_src)
{
return CLUTTER_STAGE (meta_backend_get_stage (get_backend (window_src)));
}
static MetaScreenCastWindowStream *
get_window_stream (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastStreamSrc *src;
MetaScreenCastStream *stream;
src = META_SCREEN_CAST_STREAM_SRC (window_src);
stream = meta_screen_cast_stream_src_get_stream (src);
return META_SCREEN_CAST_WINDOW_STREAM (stream);
}
static MetaWindow *
get_window (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastWindowStream *window_stream;
window_stream = get_window_stream (window_src);
return meta_screen_cast_window_stream_get_window (window_stream);
}
static int
get_stream_width (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastWindowStream *window_stream;
window_stream = get_window_stream (window_src);
return meta_screen_cast_window_stream_get_width (window_stream);
}
static int
get_stream_height (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastWindowStream *window_stream;
window_stream = get_window_stream (window_src);
return meta_screen_cast_window_stream_get_height (window_stream);
}
static void
maybe_draw_cursor_sprite (MetaScreenCastWindowStreamSrc *window_src,
uint8_t *data,
MtkRectangle *stream_rect)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
MetaBackend *backend = get_backend (window_src);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MetaCursorTracker *cursor_tracker =
meta_backend_get_cursor_tracker (backend);
MetaCursorSprite *cursor_sprite;
CoglTexture *cursor_texture;
MetaScreenCastWindow *screen_cast_window;
graphene_point_t cursor_position;
graphene_point_t relative_cursor_position;
cairo_surface_t *cursor_surface;
uint8_t *cursor_surface_data;
GError *error = NULL;
cairo_surface_t *stream_surface;
int width, height;
float scale;
MetaMonitorTransform transform;
int hotspot_x, hotspot_y;
cairo_t *cr;
cursor_sprite = meta_cursor_renderer_get_cursor (cursor_renderer);
if (!cursor_sprite)
return;
cursor_texture = meta_cursor_sprite_get_cogl_texture (cursor_sprite);
if (!cursor_texture)
return;
screen_cast_window = window_src->screen_cast_window;
meta_cursor_tracker_get_pointer (cursor_tracker, &cursor_position, NULL);
if (!meta_screen_cast_window_transform_cursor_position (screen_cast_window,
cursor_sprite,
&cursor_position,
&scale,
&transform,
&relative_cursor_position))
return;
meta_cursor_sprite_get_hotspot (cursor_sprite, &hotspot_x, &hotspot_y);
width = cogl_texture_get_width (cursor_texture) * scale;
height = cogl_texture_get_height (cursor_texture) * scale;
cursor_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width, height);
cursor_surface_data = cairo_image_surface_get_data (cursor_surface);
if (!meta_screen_cast_stream_src_draw_cursor_into (src,
cursor_texture,
scale,
transform,
cursor_surface_data,
&error))
{
g_warning ("Failed to draw cursor: %s", error->message);
g_error_free (error);
cairo_surface_destroy (cursor_surface);
return;
}
stream_surface =
cairo_image_surface_create_for_data (data, CAIRO_FORMAT_ARGB32,
stream_rect->width,
stream_rect->height,
stream_rect->width * 4);
cr = cairo_create (stream_surface);
cairo_surface_mark_dirty (cursor_surface);
cairo_surface_flush (cursor_surface);
cairo_set_source_surface (cr, cursor_surface,
relative_cursor_position.x - hotspot_x * scale,
relative_cursor_position.y - hotspot_y * scale);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (stream_surface);
cairo_surface_destroy (cursor_surface);
}
static void
maybe_blit_cursor_sprite (MetaScreenCastWindowStreamSrc *window_src,
CoglFramebuffer *framebuffer,
MtkRectangle *stream_rect)
{
MetaBackend *backend = get_backend (window_src);
CoglContext *cogl_context =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MetaCursorTracker *cursor_tracker =
meta_backend_get_cursor_tracker (backend);
MetaScreenCastWindow *screen_cast_window;
MetaCursorSprite *cursor_sprite;
graphene_point_t relative_cursor_position;
graphene_point_t cursor_position;
CoglTexture *cursor_texture;
CoglPipeline *pipeline;
int width, height;
float scale;
MetaMonitorTransform transform;
int hotspot_x, hotspot_y;
float x, y;
graphene_matrix_t matrix;
cursor_sprite = meta_cursor_renderer_get_cursor (cursor_renderer);
if (!cursor_sprite)
return;
cursor_texture = meta_cursor_sprite_get_cogl_texture (cursor_sprite);
if (!cursor_texture)
return;
screen_cast_window = window_src->screen_cast_window;
meta_cursor_tracker_get_pointer (cursor_tracker, &cursor_position, NULL);
if (!meta_screen_cast_window_transform_cursor_position (screen_cast_window,
cursor_sprite,
&cursor_position,
&scale,
&transform,
&relative_cursor_position))
return;
meta_cursor_sprite_get_hotspot (cursor_sprite, &hotspot_x, &hotspot_y);
x = (relative_cursor_position.x - hotspot_x) * scale;
y = (relative_cursor_position.y - hotspot_y) * scale;
width = cogl_texture_get_width (cursor_texture);
height = cogl_texture_get_height (cursor_texture);
pipeline = cogl_pipeline_new (cogl_context);
cogl_pipeline_set_layer_texture (pipeline, 0, cursor_texture);
cogl_pipeline_set_layer_filters (pipeline, 0,
COGL_PIPELINE_FILTER_LINEAR,
COGL_PIPELINE_FILTER_LINEAR);
graphene_matrix_init_identity (&matrix);
meta_monitor_transform_transform_matrix (transform,
&matrix);
cogl_pipeline_set_layer_matrix (pipeline, 0, &matrix);
cogl_framebuffer_draw_rectangle (framebuffer,
pipeline,
x, y,
x + width, y + height);
g_object_unref (pipeline);
}
static gboolean
capture_into (MetaScreenCastWindowStreamSrc *window_src,
int width,
int height,
int stride,
uint8_t *data)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
MtkRectangle stream_rect;
MetaScreenCastStream *stream;
stream_rect = (MtkRectangle) {
.width = width,
.height = height,
};
meta_screen_cast_window_capture_into (window_src->screen_cast_window,
&stream_rect, data);
stream = meta_screen_cast_stream_src_get_stream (src);
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
maybe_draw_cursor_sprite (window_src, data, &stream_rect);
break;
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
break;
}
return TRUE;
}
static gboolean
meta_screen_cast_window_stream_src_get_specs (MetaScreenCastStreamSrc *src,
int *width,
int *height,
float *frame_rate)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
*width = get_stream_width (window_src);
*height = get_stream_height (window_src);
*frame_rate = 60.0f;
return TRUE;
}
static gboolean
meta_screen_cast_window_stream_src_get_videocrop (MetaScreenCastStreamSrc *src,
MtkRectangle *crop_rect)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
MtkRectangle stream_rect;
meta_screen_cast_window_get_buffer_bounds (window_src->screen_cast_window,
crop_rect);
stream_rect.x = 0;
stream_rect.y = 0;
stream_rect.width = get_stream_width (window_src);
stream_rect.height = get_stream_height (window_src);
mtk_rectangle_intersect (crop_rect, &stream_rect, crop_rect);
return TRUE;
}
static void
meta_screen_cast_window_stream_src_stop (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
MetaScreenCastStream *stream = meta_screen_cast_stream_src_get_stream (src);
MetaBackend *backend = get_backend (window_src);
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
ClutterStage *stage = get_stage (window_src);
if (!window_src->screen_cast_window)
return;
g_clear_signal_handler (&window_src->screen_cast_window_damaged_handler_id,
window_src->screen_cast_window);
g_clear_signal_handler (&window_src->screen_cast_window_destroyed_handler_id,
window_src->screen_cast_window);
g_clear_signal_handler (&window_src->position_invalidated_handler_id,
cursor_tracker);
g_clear_signal_handler (&window_src->cursor_changed_handler_id,
cursor_tracker);
g_clear_signal_handler (&window_src->prepare_frame_handler_id,
stage);
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 void
screen_cast_window_damaged (MetaWindowActor *actor,
MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
MetaScreenCastPaintPhase paint_phase;
MetaScreenCastRecordFlag flags;
flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
paint_phase = META_SCREEN_CAST_PAINT_PHASE_DETACHED;
meta_screen_cast_stream_src_maybe_record_frame (src, flags,
paint_phase,
NULL);
}
static void
screen_cast_window_destroyed (MetaWindowActor *actor,
MetaScreenCastWindowStreamSrc *window_src)
{
meta_screen_cast_window_stream_src_stop (window_src);
window_src->screen_cast_window = NULL;
}
static void
sync_cursor_state (MetaScreenCastWindowStreamSrc *window_src)
{
MetaScreenCastStreamSrc *src = META_SCREEN_CAST_STREAM_SRC (window_src);
MetaScreenCastPaintPhase paint_phase;
MetaScreenCastRecordFlag flags;
if (meta_screen_cast_window_has_damage (window_src->screen_cast_window))
return;
flags = META_SCREEN_CAST_RECORD_FLAG_CURSOR_ONLY;
paint_phase = META_SCREEN_CAST_PAINT_PHASE_DETACHED;
meta_screen_cast_stream_src_maybe_record_frame (src, flags,
paint_phase,
NULL);
}
static void
pointer_position_invalidated (MetaCursorTracker *cursor_tracker,
MetaScreenCastWindowStreamSrc *window_src)
{
ClutterStage *stage = get_stage (window_src);
clutter_stage_schedule_update (stage);
}
static void
cursor_changed (MetaCursorTracker *cursor_tracker,
MetaScreenCastWindowStreamSrc *window_src)
{
window_src->cursor_bitmap_invalid = TRUE;
sync_cursor_state (window_src);
}
static void
on_prepare_frame (ClutterStage *stage,
ClutterStageView *stage_view,
ClutterFrame *frame,
MetaScreenCastWindowStreamSrc *window_src)
{
sync_cursor_state (window_src);
}
static void
meta_screen_cast_window_stream_src_enable (MetaScreenCastStreamSrc *src)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
MetaBackend *backend = get_backend (window_src);
ClutterStage *stage = get_stage (window_src);
MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
MetaScreenCastPaintPhase paint_phase;
MetaWindowActor *window_actor;
MetaScreenCastStream *stream;
MetaScreenCastRecordFlag flags;
window_actor = meta_window_actor_from_window (get_window (window_src));
if (!window_actor)
return;
window_src->screen_cast_window = META_SCREEN_CAST_WINDOW (window_actor);
window_src->screen_cast_window_damaged_handler_id =
g_signal_connect (window_src->screen_cast_window,
"damaged",
G_CALLBACK (screen_cast_window_damaged),
window_src);
window_src->screen_cast_window_destroyed_handler_id =
g_signal_connect (window_src->screen_cast_window,
"destroy",
G_CALLBACK (screen_cast_window_destroyed),
window_src);
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:
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
window_src->position_invalidated_handler_id =
g_signal_connect_after (cursor_tracker, "position-invalidated",
G_CALLBACK (pointer_position_invalidated),
window_src);
window_src->cursor_changed_handler_id =
g_signal_connect_after (cursor_tracker, "cursor-changed",
G_CALLBACK (cursor_changed),
window_src);
window_src->prepare_frame_handler_id =
g_signal_connect_after (stage, "prepare_frame",
G_CALLBACK (on_prepare_frame),
window_src);
meta_cursor_tracker_track_position (cursor_tracker);
break;
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
break;
}
flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
paint_phase = META_SCREEN_CAST_PAINT_PHASE_DETACHED;
meta_screen_cast_stream_src_maybe_record_frame (src, flags,
paint_phase,
NULL);
}
static void
meta_screen_cast_window_stream_src_disable (MetaScreenCastStreamSrc *src)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
meta_screen_cast_window_stream_src_stop (window_src);
}
static gboolean
meta_screen_cast_window_stream_src_record_to_buffer (MetaScreenCastStreamSrc *src,
MetaScreenCastPaintPhase paint_phase,
int width,
int height,
int stride,
uint8_t *data,
GError **error)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
capture_into (window_src, width, height, stride, data);
return TRUE;
}
static gboolean
meta_screen_cast_window_stream_src_record_to_framebuffer (MetaScreenCastStreamSrc *src,
MetaScreenCastPaintPhase paint_phase,
CoglFramebuffer *framebuffer,
GError **error)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
MetaScreenCastStream *stream;
MtkRectangle stream_rect;
stream_rect.x = 0;
stream_rect.y = 0;
stream_rect.width = cogl_framebuffer_get_width (framebuffer);
stream_rect.height = cogl_framebuffer_get_height (framebuffer);
if (!meta_screen_cast_window_blit_to_framebuffer (window_src->screen_cast_window,
&stream_rect,
framebuffer))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Failed to blit window content to framebuffer");
return FALSE;
}
stream = meta_screen_cast_stream_src_get_stream (src);
switch (meta_screen_cast_stream_get_cursor_mode (stream))
{
case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
maybe_blit_cursor_sprite (window_src, framebuffer, &stream_rect);
break;
case META_SCREEN_CAST_CURSOR_MODE_METADATA:
case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
break;
}
cogl_framebuffer_flush (framebuffer);
return TRUE;
}
static void
meta_screen_cast_window_stream_record_follow_up (MetaScreenCastStreamSrc *src)
{
MetaScreenCastPaintPhase paint_phase;
MetaScreenCastRecordFlag flags;
flags = META_SCREEN_CAST_RECORD_FLAG_NONE;
paint_phase = META_SCREEN_CAST_PAINT_PHASE_DETACHED;
meta_screen_cast_stream_src_maybe_record_frame (src, flags,
paint_phase,
NULL);
}
static void
meta_screen_cast_window_stream_src_set_cursor_metadata (MetaScreenCastStreamSrc *src,
struct spa_meta_cursor *spa_meta_cursor)
{
MetaScreenCastWindowStreamSrc *window_src =
META_SCREEN_CAST_WINDOW_STREAM_SRC (src);
MetaBackend *backend = get_backend (window_src);
MetaCursorRenderer *cursor_renderer =
meta_backend_get_cursor_renderer (backend);
MetaCursorTracker *cursor_tracker =
meta_backend_get_cursor_tracker (backend);
MetaScreenCastWindow *screen_cast_window = window_src->screen_cast_window;
MetaCursorSprite *cursor_sprite;
graphene_point_t cursor_position;
float scale;
MetaMonitorTransform transform;
graphene_point_t relative_cursor_position;
int x, y;
cursor_sprite = meta_cursor_renderer_get_cursor (cursor_renderer);
meta_cursor_tracker_get_pointer (cursor_tracker, &cursor_position, NULL);
if (!meta_cursor_tracker_get_pointer_visible (cursor_tracker) ||
!meta_screen_cast_window_transform_cursor_position (screen_cast_window,
cursor_sprite,
&cursor_position,
&scale,
&transform,
&relative_cursor_position))
{
meta_screen_cast_stream_src_unset_cursor_metadata (src,
spa_meta_cursor);
return;
}
x = (int) roundf (relative_cursor_position.x);
y = (int) roundf (relative_cursor_position.y);
if (window_src->cursor_bitmap_invalid)
{
if (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);
}
window_src->cursor_bitmap_invalid = FALSE;
}
else
{
meta_screen_cast_stream_src_set_cursor_position_metadata (src,
spa_meta_cursor,
x, y);
}
}
static CoglPixelFormat
meta_screen_cast_window_stream_src_get_preferred_format (MetaScreenCastStreamSrc *src)
{
return COGL_PIXEL_FORMAT_BGRA_8888_PRE;
}
MetaScreenCastWindowStreamSrc *
meta_screen_cast_window_stream_src_new (MetaScreenCastWindowStream *window_stream,
GError **error)
{
return g_initable_new (META_TYPE_SCREEN_CAST_WINDOW_STREAM_SRC, NULL, error,
"stream", window_stream,
NULL);
}
static void
meta_screen_cast_window_stream_src_init (MetaScreenCastWindowStreamSrc *window_src)
{
window_src->cursor_bitmap_invalid = TRUE;
}
static void
meta_screen_cast_window_stream_src_class_init (MetaScreenCastWindowStreamSrcClass *klass)
{
MetaScreenCastStreamSrcClass *src_class =
META_SCREEN_CAST_STREAM_SRC_CLASS (klass);
src_class->get_specs = meta_screen_cast_window_stream_src_get_specs;
src_class->enable = meta_screen_cast_window_stream_src_enable;
src_class->disable = meta_screen_cast_window_stream_src_disable;
src_class->record_to_buffer =
meta_screen_cast_window_stream_src_record_to_buffer;
src_class->record_to_framebuffer =
meta_screen_cast_window_stream_src_record_to_framebuffer;
src_class->record_follow_up =
meta_screen_cast_window_stream_record_follow_up;
src_class->get_videocrop = meta_screen_cast_window_stream_src_get_videocrop;
src_class->set_cursor_metadata = meta_screen_cast_window_stream_src_set_cursor_metadata;
src_class->get_preferred_format =
meta_screen_cast_window_stream_src_get_preferred_format;
}
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