mutter/src/compositor/meta-surface-actor.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* SECTION:meta-surface-actor
* @title: MetaSurfaceActor
* @short_description: An actor representing a surface in the scene graph
*
* A surface can be either a shaped texture, or a group of shaped texture,
* used to draw the content of a window.
*/
#include <config.h>
#include <clutter/clutter.h>
#include <cogl/cogl-wayland-server.h>
#include <cogl/cogl-texture-pixmap-x11.h>
#include <meta/meta-shaped-texture.h>
#include "meta-surface-actor.h"
#include "meta-wayland-private.h"
#include "meta-cullable.h"
#include "meta-shaped-texture-private.h"
struct _MetaSurfaceActorPrivate
{
MetaShapedTexture *texture;
MetaWaylandBuffer *buffer;
/* The region that is visible, used to optimize out redraws */
cairo_region_t *unobscured_region;
};
static void cullable_iface_init (MetaCullableInterface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaSurfaceActor, meta_surface_actor, CLUTTER_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
static gboolean
meta_surface_actor_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
MetaSurfaceActor *self = META_SURFACE_ACTOR (actor);
MetaSurfaceActorPrivate *priv = self->priv;
if (!CLUTTER_ACTOR_CLASS (meta_surface_actor_parent_class)->get_paint_volume (actor, volume))
return FALSE;
if (priv->unobscured_region)
{
ClutterVertex origin;
cairo_rectangle_int_t bounds, unobscured_bounds;
/* I hate ClutterPaintVolume so much... */
clutter_paint_volume_get_origin (volume, &origin);
bounds.x = origin.x;
bounds.y = origin.y;
bounds.width = clutter_paint_volume_get_width (volume);
bounds.height = clutter_paint_volume_get_height (volume);
cairo_region_get_extents (priv->unobscured_region, &unobscured_bounds);
gdk_rectangle_intersect (&bounds, &unobscured_bounds, &bounds);
origin.x = bounds.x;
origin.y = bounds.y;
clutter_paint_volume_set_origin (volume, &origin);
clutter_paint_volume_set_width (volume, bounds.width);
clutter_paint_volume_set_height (volume, bounds.height);
}
return TRUE;
}
static void
meta_surface_actor_dispose (GObject *object)
{
MetaSurfaceActor *self = META_SURFACE_ACTOR (object);
MetaSurfaceActorPrivate *priv = self->priv;
g_clear_pointer (&priv->unobscured_region, cairo_region_destroy);
G_OBJECT_CLASS (meta_surface_actor_parent_class)->dispose (object);
}
static void
meta_surface_actor_class_init (MetaSurfaceActorClass *klass)
{
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
actor_class->get_paint_volume = meta_surface_actor_get_paint_volume;
object_class->dispose = meta_surface_actor_dispose;
g_type_class_add_private (klass, sizeof (MetaSurfaceActorPrivate));
}
static void
set_unobscured_region (MetaSurfaceActor *self,
cairo_region_t *unobscured_region)
{
MetaSurfaceActorPrivate *priv = self->priv;
if (priv->unobscured_region)
cairo_region_destroy (priv->unobscured_region);
if (unobscured_region)
priv->unobscured_region = cairo_region_copy (unobscured_region);
else
priv->unobscured_region = NULL;
}
static void
meta_surface_actor_cull_out (MetaCullable *cullable,
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cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
MetaSurfaceActor *self = META_SURFACE_ACTOR (cullable);
set_unobscured_region (self, unobscured_region);
meta_cullable_cull_out_children (cullable, unobscured_region, clip_region);
}
static void
meta_surface_actor_reset_culling (MetaCullable *cullable)
{
MetaSurfaceActor *self = META_SURFACE_ACTOR (cullable);
set_unobscured_region (self, NULL);
meta_cullable_reset_culling_children (cullable);
}
static void
cullable_iface_init (MetaCullableInterface *iface)
{
iface->cull_out = meta_surface_actor_cull_out;
iface->reset_culling = meta_surface_actor_reset_culling;
}
static void
meta_surface_actor_init (MetaSurfaceActor *self)
{
MetaSurfaceActorPrivate *priv;
priv = self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
META_TYPE_SURFACE_ACTOR,
MetaSurfaceActorPrivate);
priv->texture = META_SHAPED_TEXTURE (meta_shaped_texture_new ());
clutter_actor_add_child (CLUTTER_ACTOR (self), CLUTTER_ACTOR (priv->texture));
}
cairo_surface_t *
meta_surface_actor_get_image (MetaSurfaceActor *self,
cairo_rectangle_int_t *clip)
{
return meta_shaped_texture_get_image (self->priv->texture, clip);
}
MetaShapedTexture *
meta_surface_actor_get_texture (MetaSurfaceActor *self)
{
return self->priv->texture;
}
static void
update_area (MetaSurfaceActor *self,
int x, int y, int width, int height)
{
MetaSurfaceActorPrivate *priv = self->priv;
if (meta_is_wayland_compositor ())
{
struct wl_resource *resource = priv->buffer->resource;
struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get (resource);
if (shm_buffer)
{
CoglTexture2D *texture = COGL_TEXTURE_2D (priv->buffer->texture);
cogl_wayland_texture_set_region_from_shm_buffer (texture, x, y, width, height, shm_buffer, x, y, 0, NULL);
}
}
else
{
CoglTexturePixmapX11 *texture = COGL_TEXTURE_PIXMAP_X11 (meta_shaped_texture_get_texture (priv->texture));
cogl_texture_pixmap_x11_update_area (texture, x, y, width, height);
}
}
static cairo_region_t *
effective_unobscured_region (MetaSurfaceActor *self)
{
MetaSurfaceActorPrivate *priv = self->priv;
return clutter_actor_has_mapped_clones (CLUTTER_ACTOR (self)) ? NULL : priv->unobscured_region;
}
gboolean
meta_surface_actor_damage_all (MetaSurfaceActor *self)
{
MetaSurfaceActorPrivate *priv = self->priv;
CoglTexture *texture = meta_shaped_texture_get_texture (priv->texture);
update_area (self, 0, 0, cogl_texture_get_width (texture), cogl_texture_get_height (texture));
return meta_shaped_texture_update_area (priv->texture,
0, 0,
cogl_texture_get_width (texture),
cogl_texture_get_height (texture),
effective_unobscured_region (self));
}
gboolean
meta_surface_actor_damage_area (MetaSurfaceActor *self,
int x,
int y,
int width,
int height)
{
MetaSurfaceActorPrivate *priv = self->priv;
update_area (self, x, y, width, height);
return meta_shaped_texture_update_area (priv->texture,
x, y, width, height,
effective_unobscured_region (self));
}
gboolean
meta_surface_actor_is_obscured (MetaSurfaceActor *self)
{
MetaSurfaceActorPrivate *priv = self->priv;
if (priv->unobscured_region)
return cairo_region_is_empty (priv->unobscured_region);
else
return FALSE;
}
void
meta_surface_actor_attach_wayland_buffer (MetaSurfaceActor *self,
MetaWaylandBuffer *buffer)
{
MetaSurfaceActorPrivate *priv = self->priv;
priv->buffer = buffer;
if (buffer)
meta_shaped_texture_set_texture (priv->texture, buffer->texture);
else
meta_shaped_texture_set_texture (priv->texture, NULL);
}
void
meta_surface_actor_set_texture (MetaSurfaceActor *self,
CoglTexture *texture)
{
MetaSurfaceActorPrivate *priv = self->priv;
meta_shaped_texture_set_texture (priv->texture, texture);
}
void
meta_surface_actor_set_input_region (MetaSurfaceActor *self,
cairo_region_t *region)
{
MetaSurfaceActorPrivate *priv = self->priv;
meta_shaped_texture_set_input_shape_region (priv->texture, region);
}
void
meta_surface_actor_set_opaque_region (MetaSurfaceActor *self,
cairo_region_t *region)
{
MetaSurfaceActorPrivate *priv = self->priv;
meta_shaped_texture_set_opaque_region (priv->texture, region);
}
MetaSurfaceActor *
meta_surface_actor_new (void)
{
return g_object_new (META_TYPE_SURFACE_ACTOR, NULL);
}