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mutter-performance-source/clutter/wayland/clutter-wayland-surface.c
Emmanuele Bassi 0b76ba332d Fixes for the API reference 
Typos, missing symbols, and missing documentation.
2012-04-27 12:30:48 +01:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2011 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
/**
* SECTION:clutter-wayland-surface
* @Title: ClutterWaylandSurface
* @short_description: An actor which displays the content of a client surface
*
* #ClutterWaylandSurface is an actor for displaying the contents of a client
* surface. It is intended to support developers implementing Clutter based
* wayland compositors.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define CLUTTER_ENABLE_EXPERIMENTAL_API
#include "clutter-wayland-surface.h"
#include "clutter-actor-private.h"
#include "clutter-marshal.h"
#include "clutter-paint-volume-private.h"
#include "clutter-private.h"
#include "clutter-backend.h"
#include <cogl/cogl.h>
#include <cogl/cogl-wayland-server.h>
enum
{
PROP_SURFACE = 1,
PROP_SURFACE_WIDTH,
PROP_SURFACE_HEIGHT,
PROP_COGL_TEXTURE,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
enum
{
QUEUE_DAMAGE_REDRAW,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0, };
struct _ClutterWaylandSurfacePrivate
{
struct wl_surface *surface;
CoglTexture2D *buffer;
int width, height;
CoglPipeline *pipeline;
};
G_DEFINE_TYPE (ClutterWaylandSurface,
clutter_wayland_surface,
CLUTTER_TYPE_ACTOR);
static gboolean
clutter_wayland_surface_get_paint_volume (ClutterActor *self,
ClutterPaintVolume *volume)
{
return clutter_paint_volume_set_from_allocation (volume, self);
}
static void
clutter_wayland_surface_queue_damage_redraw (ClutterWaylandSurface *texture,
gint x,
gint y,
gint width,
gint height)
{
ClutterWaylandSurfacePrivate *priv = texture->priv;
ClutterActor *self = CLUTTER_ACTOR (texture);
ClutterActorBox allocation;
float scale_x;
float scale_y;
cairo_rectangle_int_t clip;
/* NB: clutter_actor_queue_redraw_with_clip expects a box in the actor's
* coordinate space so we need to convert from surface coordinates to
* actor coordinates...
*/
/* Calling clutter_actor_get_allocation_box() is enormously expensive
* if the actor has an out-of-date allocation, since it triggers
* a full redraw. clutter_actor_queue_redraw_with_clip() would redraw
* the whole stage anyways in that case, so just go ahead and do
* it here.
*/
if (!clutter_actor_has_allocation (self))
{
clutter_actor_queue_redraw (self);
return;
}
if (priv->width == 0 || priv->height == 0)
return;
clutter_actor_get_allocation_box (self, &allocation);
scale_x = (allocation.x2 - allocation.x1) / priv->width;
scale_y = (allocation.y2 - allocation.y1) / priv->height;
clip.x = x * scale_x;
clip.y = y * scale_y;
clip.width = width * scale_x;
clip.height = height * scale_y;
clutter_actor_queue_redraw_with_clip (self, &clip);
}
static void
free_pipeline (ClutterWaylandSurface *self)
{
ClutterWaylandSurfacePrivate *priv = self->priv;
if (priv->pipeline)
{
cogl_object_unref (priv->pipeline);
priv->pipeline = NULL;
}
}
static void
opacity_change_cb (ClutterWaylandSurface *self)
{
free_pipeline (self);
}
static void
clutter_wayland_surface_init (ClutterWaylandSurface *self)
{
ClutterWaylandSurfacePrivate *priv =
G_TYPE_INSTANCE_GET_PRIVATE (self,
CLUTTER_WAYLAND_TYPE_SURFACE,
ClutterWaylandSurfacePrivate);
priv->surface = NULL;
priv->width = 0;
priv->height = 0;
self->priv = priv;
g_signal_connect (self, "notify::opacity", G_CALLBACK (opacity_change_cb), NULL);
}
static void
free_surface_buffers (ClutterWaylandSurface *self)
{
ClutterWaylandSurfacePrivate *priv = self->priv;
if (priv->buffer)
{
cogl_object_unref (priv->buffer);
priv->buffer = NULL;
free_pipeline (self);
}
}
static void
clutter_wayland_surface_dispose (GObject *object)
{
ClutterWaylandSurface *self = CLUTTER_WAYLAND_SURFACE (object);
ClutterWaylandSurfacePrivate *priv = self->priv;
free_pipeline (self);
free_surface_buffers (self);
priv->surface = NULL;
G_OBJECT_CLASS (clutter_wayland_surface_parent_class)->dispose (object);
}
static void
set_size (ClutterWaylandSurface *self,
int width,
int height)
{
ClutterWaylandSurfacePrivate *priv = self->priv;
if (priv->width != width)
{
priv->width = width;
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_SURFACE_WIDTH]);
}
if (priv->height != height)
{
priv->height = height;
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_SURFACE_HEIGHT]);
}
clutter_actor_set_size (CLUTTER_ACTOR (self), priv->width, priv->height);
}
/**
* clutter_wayland_surface_get_surface:
* @self: a #ClutterWaylandSurface
*
* Retrieves a point to the Wayland surface used by the actor.
*
* Return value: (transfer none): a wl_surface pointer, or %NULL
*
* Since: 1.10
*/
struct wl_surface *
clutter_wayland_surface_get_surface (ClutterWaylandSurface *self)
{
ClutterWaylandSurfacePrivate *priv = self->priv;
return priv->surface;
}
/**
* clutter_wayland_surface_set_surface:
* @self: a #ClutterWaylandSurface
* @surface: a Wayland wl_surface pointer
*
* Sets the Wayland surface to be used by the actor.
*
* Since: 1.10
*/
void
clutter_wayland_surface_set_surface (ClutterWaylandSurface *self,
struct wl_surface *surface)
{
ClutterWaylandSurfacePrivate *priv;
g_return_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self));
priv = self->priv;
if (priv->surface == surface)
return;
if (priv->surface)
{
free_pipeline (self);
free_surface_buffers (self);
g_signal_emit (self, signals[QUEUE_DAMAGE_REDRAW],
0,
0, 0, priv->width, priv->height);
}
priv->surface = surface;
/* XXX: should we freeze/thaw notifications? */
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_SURFACE]);
/* We have to wait until the next attach event to find out the surface
* geometry... */
set_size (self, 0, 0);
}
static void
clutter_wayland_surface_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterWaylandSurface *self = CLUTTER_WAYLAND_SURFACE (object);
switch (prop_id)
{
case PROP_SURFACE:
clutter_wayland_surface_set_surface (self, g_value_get_pointer (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_wayland_surface_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterWaylandSurface *self = CLUTTER_WAYLAND_SURFACE (object);
ClutterWaylandSurfacePrivate *priv = self->priv;
switch (prop_id)
{
case PROP_SURFACE:
g_value_set_pointer (value, priv->surface);
break;
case PROP_SURFACE_WIDTH:
g_value_set_uint (value, priv->width);
break;
case PROP_SURFACE_HEIGHT:
g_value_set_uint (value, priv->height);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_wayland_surface_paint (ClutterActor *self)
{
ClutterWaylandSurfacePrivate *priv;
ClutterActorBox box;
g_return_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self));
priv = CLUTTER_WAYLAND_SURFACE (self)->priv;
if (G_UNLIKELY (priv->pipeline == NULL))
{
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
guint8 paint_opacity = clutter_actor_get_paint_opacity (self);
priv->pipeline = cogl_pipeline_new (ctx);
cogl_pipeline_set_color4ub (priv->pipeline,
paint_opacity,
paint_opacity,
paint_opacity,
paint_opacity);
cogl_pipeline_set_layer_texture (priv->pipeline, 0,
COGL_TEXTURE (priv->buffer));
}
cogl_set_source (priv->pipeline);
clutter_actor_get_allocation_box (self, &box);
cogl_rectangle (0, 0, box.x2 - box.x1, box.y2 - box.y1);
}
static void
clutter_wayland_surface_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
ClutterWaylandSurfacePrivate *priv;
g_return_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self));
priv = CLUTTER_WAYLAND_SURFACE (self)->priv;
if (min_width_p)
*min_width_p = 0;
if (natural_width_p)
*natural_width_p = priv->width;
}
static void
clutter_wayland_surface_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
ClutterWaylandSurfacePrivate *priv;
g_return_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self));
priv = CLUTTER_WAYLAND_SURFACE (self)->priv;
if (min_height_p)
*min_height_p = 0;
if (natural_height_p)
*natural_height_p = priv->height;
}
static gboolean
clutter_wayland_surface_has_overlaps (ClutterActor *self)
{
/* Rectangles never need an offscreen redirect because there are
never any overlapping primitives */
return FALSE;
}
static void
clutter_wayland_surface_class_init (ClutterWaylandSurfaceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (ClutterWaylandSurfacePrivate));
actor_class->get_paint_volume = clutter_wayland_surface_get_paint_volume;
actor_class->paint = clutter_wayland_surface_paint;
actor_class->get_preferred_width =
clutter_wayland_surface_get_preferred_width;
actor_class->get_preferred_height =
clutter_wayland_surface_get_preferred_height;
actor_class->has_overlaps = clutter_wayland_surface_has_overlaps;
object_class->dispose = clutter_wayland_surface_dispose;
object_class->set_property = clutter_wayland_surface_set_property;
object_class->get_property = clutter_wayland_surface_get_property;
pspec = g_param_spec_pointer ("surface",
P_("Surface"),
P_("The underlying wayland surface"),
CLUTTER_PARAM_READWRITE|
G_PARAM_CONSTRUCT_ONLY);
obj_props[PROP_SURFACE] = pspec;
g_object_class_install_property (object_class, PROP_SURFACE, pspec);
pspec = g_param_spec_uint ("surface-width",
P_("Surface width"),
P_("The width of the underlying wayland surface"),
0, G_MAXUINT,
0,
G_PARAM_READABLE);
obj_props[PROP_SURFACE_WIDTH] = pspec;
g_object_class_install_property (object_class, PROP_SURFACE_WIDTH, pspec);
pspec = g_param_spec_uint ("surface-height",
P_("Surface height"),
P_("The height of the underlying wayland surface"),
0, G_MAXUINT,
0,
G_PARAM_READABLE);
obj_props[PROP_SURFACE_HEIGHT] = pspec;
g_object_class_install_property (object_class, PROP_SURFACE_HEIGHT, pspec);
pspec = g_param_spec_boxed ("cogl-texture",
P_("Cogl Texture"),
P_("The underlying Cogl texture handle used to draw this actor"),
COGL_TYPE_HANDLE,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_COGL_TEXTURE] = pspec;
g_object_class_install_property (object_class, PROP_COGL_TEXTURE, pspec);
/**
* ClutterWaylandSurface::queue-damage-redraw:
* @texture: the object which received the signal
* @x: The top left x position of the damage region
* @y: The top left y position of the damage region
* @width: The width of the damage region
* @height: The height of the damage region
*
* ::queue-damage-redraw is emitted to notify that some sub-region
* of the texture has been changed. This usually means a redraw
* needs to be queued for the actor.
*
* The default handler will queue a clipped redraw in response to
* the damage, using the assumption that the pixmap is being painted
* to a rectangle covering the transformed allocation of the actor.
* If you sub-class and change the paint method so this isn't true
* then you must also provide your own damage signal handler to
* queue a redraw that blocks this default behaviour.
*
* Since: 1.10
*/
signals[QUEUE_DAMAGE_REDRAW] =
g_signal_new (g_intern_static_string ("queue-damage-redraw"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterWaylandSurfaceClass, queue_damage_redraw),
NULL, NULL,
_clutter_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
klass->queue_damage_redraw = clutter_wayland_surface_queue_damage_redraw;
}
/**
* clutter_wayland_surface_new:
* @surface: the Wayland surface this actor should represent
*
* Creates a new #ClutterWaylandSurface for @surface
*
* Return value: A new #ClutterWaylandSurface representing @surface
*
* Since: 1.8
* Stability: unstable
*/
ClutterActor *
clutter_wayland_surface_new (struct wl_surface *surface)
{
ClutterActor *actor;
actor = g_object_new (CLUTTER_WAYLAND_TYPE_SURFACE,
"surface", surface,
NULL);
return actor;
}
/**
* clutter_wayland_surface_attach_buffer:
* @self: A #ClutterWaylandSurface actor
* @buffer: A compositor side struct wl_buffer pointer
* @error: A #GError
*
* This associates a client's buffer with the #ClutterWaylandSurface
* actor @self. This will automatically result in @self being re-drawn
* with the new buffer contents.
*
* Since: 1.8
* Stability: unstable
*/
gboolean
clutter_wayland_surface_attach_buffer (ClutterWaylandSurface *self,
struct wl_buffer *buffer,
GError **error)
{
ClutterWaylandSurfacePrivate *priv;
ClutterBackend *backend = clutter_get_default_backend ();
CoglContext *context = clutter_backend_get_cogl_context (backend);
g_return_val_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self), TRUE);
priv = self->priv;
free_surface_buffers (self);
set_size (self, buffer->width, buffer->height);
priv->buffer =
cogl_wayland_texture_2d_new_from_buffer (context, buffer, error);
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_COGL_TEXTURE]);
/* NB: We don't queue a redraw of the actor here because we don't
* know how much of the buffer has changed with respect to the
* previous buffer. We only ever queue a redraw in response to
* surface damage. */
if (!priv->buffer)
return FALSE;
return TRUE;
}
/**
* clutter_wayland_surface_damage_buffer:
* @self: A #ClutterWaylandSurface actor
* @buffer: A compositor side struct wl_buffer pointer
* @x: The x coordinate of the damaged rectangle
* @y: The y coordinate of the damaged rectangle
* @width: The width of the damaged rectangle
* @height: The height of the damaged rectangle
*
* This marks a region of the given @buffer has having been changed by
* the client. This will automatically result in the corresponding damaged
* region of the actor @self being redrawn.
*
* If multiple regions are changed then this should be called multiple
* times with different damage rectangles.
*
* Since: 1.8
* Stability: unstable
*/
void
clutter_wayland_surface_damage_buffer (ClutterWaylandSurface *self,
struct wl_buffer *buffer,
gint32 x,
gint32 y,
gint32 width,
gint32 height)
{
ClutterWaylandSurfacePrivate *priv;
g_return_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self));
priv = self->priv;
if (priv->buffer && wl_buffer_is_shm (buffer))
{
CoglPixelFormat format;
switch (wl_shm_buffer_get_format (buffer))
{
#if G_BYTE_ORDER == G_BIG_ENDIAN
case WL_SHM_FORMAT_ARGB8888:
format = COGL_PIXEL_FORMAT_ARGB_8888_PRE;
break;
case WL_SHM_FORMAT_XRGB8888:
format = COGL_PIXEL_FORMAT_ARGB_8888;
break;
#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
case WL_SHM_FORMAT_ARGB8888:
format = COGL_PIXEL_FORMAT_BGRA_8888_PRE;
break;
case WL_SHM_FORMAT_XRGB8888:
format = COGL_PIXEL_FORMAT_BGRA_8888;
break;
#endif
default:
g_warn_if_reached ();
format = COGL_PIXEL_FORMAT_ARGB_8888;
}
cogl_texture_set_region (COGL_TEXTURE (priv->buffer),
x, y,
x, y,
width, height,
width, height,
format,
wl_shm_buffer_get_stride (buffer),
wl_shm_buffer_get_data (buffer));
}
g_signal_emit (self, signals[QUEUE_DAMAGE_REDRAW],
0,
x, y, width, height);
}
/**
* clutter_wayland_surface_get_cogl_texture:
* @self: a #ClutterWaylandSurface
*
* Retrieves the Cogl texture with the contents of the Wayland surface.
*
* Return value: (transfer none): a Cogl texture, or %NULL
*
* Since: 1.10
*/
CoglTexture *
clutter_wayland_surface_get_cogl_texture (ClutterWaylandSurface *self)
{
g_return_val_if_fail (CLUTTER_WAYLAND_IS_SURFACE (self), NULL);
return COGL_TEXTURE (self->priv->buffer);
}
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