mutter/clutter/clutter-image.c

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/*
* Clutter.
*
* An OpenGL based 'interactive image' library.
*
* Copyright (C) 2012 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/>.
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-image.h"
#include "clutter-color.h"
#include "clutter-content-private.h"
#include "clutter-debug.h"
#include "clutter-paint-node.h"
#include "clutter-paint-nodes.h"
#include "clutter-private.h"
struct _ClutterImagePrivate
{
CoglTexture *texture;
};
static void clutter_content_iface_init (ClutterContentIface *iface);
G_DEFINE_TYPE_WITH_CODE (ClutterImage, clutter_image, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_CONTENT,
clutter_content_iface_init))
GQuark
clutter_image_error_quark (void)
{
return g_quark_from_static_string ("clutter-image-error-quark");
}
static void
clutter_image_finalize (GObject *gobject)
{
ClutterImagePrivate *priv = CLUTTER_IMAGE (gobject)->priv;
if (priv->texture != NULL)
{
cogl_object_unref (priv->texture);
priv->texture = NULL;
}
G_OBJECT_CLASS (clutter_image_parent_class)->finalize (gobject);
}
static void
clutter_image_class_init (ClutterImageClass *klass)
{
g_type_class_add_private (klass, sizeof (ClutterImagePrivate));
G_OBJECT_CLASS (klass)->finalize = clutter_image_finalize;
}
static void
clutter_image_init (ClutterImage *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, CLUTTER_TYPE_IMAGE,
ClutterImagePrivate);
}
static void
clutter_image_paint_content (ClutterContent *content,
ClutterActor *actor,
ClutterPaintNode *root)
{
ClutterImagePrivate *priv = CLUTTER_IMAGE (content)->priv;
ClutterScalingFilter min_f, mag_f;
ClutterPaintNode *node;
ClutterActorBox box;
ClutterColor color;
guint8 paint_opacity;
if (priv->texture == NULL)
return;
clutter_actor_get_content_box (actor, &box);
paint_opacity = clutter_actor_get_paint_opacity (actor);
clutter_actor_get_content_scaling_filters (actor, &min_f, &mag_f);
color.red = paint_opacity;
color.green = paint_opacity;
color.blue = paint_opacity;
color.alpha = paint_opacity;
node = clutter_texture_node_new (priv->texture, &color, min_f, mag_f);
clutter_paint_node_set_name (node, "Image");
clutter_paint_node_add_rectangle (node, &box);
clutter_paint_node_add_child (root, node);
clutter_paint_node_unref (node);
}
static gboolean
clutter_image_get_preferred_size (ClutterContent *content,
gfloat *width,
gfloat *height)
{
ClutterImagePrivate *priv = CLUTTER_IMAGE (content)->priv;
if (priv->texture == NULL)
return FALSE;
if (width != NULL)
*width = cogl_texture_get_width (priv->texture);
if (height != NULL)
*height = cogl_texture_get_height (priv->texture);
return TRUE;
}
static void
clutter_content_iface_init (ClutterContentIface *iface)
{
iface->get_preferred_size = clutter_image_get_preferred_size;
iface->paint_content = clutter_image_paint_content;
}
/**
* clutter_image_new:
*
* FIXME
*
* Return value: (transfer full): FIXME
*
* Since: 1.10
*/
ClutterContent *
clutter_image_new (void)
{
return g_object_new (CLUTTER_TYPE_IMAGE, NULL);
}
gboolean
clutter_image_set_data (ClutterImage *image,
const guint8 *data,
CoglPixelFormat pixel_format,
guint width,
guint height,
guint row_stride,
GError **error)
{
ClutterImagePrivate *priv;
g_return_val_if_fail (CLUTTER_IS_IMAGE (image), FALSE);
g_return_val_if_fail (data != NULL, FALSE);
priv = image->priv;
if (priv->texture != NULL)
cogl_object_unref (priv->texture);
priv->texture = cogl_texture_new_from_data (width, height,
COGL_TEXTURE_NONE,
pixel_format,
COGL_PIXEL_FORMAT_ANY,
row_stride,
data);
if (priv->texture == NULL)
{
g_set_error_literal (error, CLUTTER_IMAGE_ERROR,
CLUTTER_IMAGE_ERROR_INVALID_DATA,
_("Unable to load image data"));
return FALSE;
}
clutter_content_invalidate (CLUTTER_CONTENT (image));
return TRUE;
}