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clutter: Add new ClutterContent type ClutterTextureContent

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A simply wrapper around `CoglTexture`, making it easy to reuse
content without roundtrip from GPU to CPU memory and back.

It optionally takes a clip rectangle which is implemented by
creating a `CoglSubTexture`. A limitation here is that floating
point clips are not supported.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1888>
This commit is contained in:
Robert Mader 2019-01-21 14:15:51 +01:00
parent a466738945
commit 8da65d7dcd
4 changed files with 225 additions and 0 deletions
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169
clutter/clutter/clutter-texture-content.c Normal file
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@ -0,0 +1,169 @@
/*
* Clutter.
*
* An OpenGL based 'interactive image' library.
*
* Copyright (C) 2012 Intel Corporation.
* Copyright (C) 2021 Robert Mader.
*
* 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>
* Robert Mader <robert.mader@posteo.de>
*/
#include "clutter-build-config.h"
#include "clutter-texture-content.h"
#include "clutter-actor-private.h"
#include "clutter-content-private.h"
#include "clutter-paint-node.h"
struct _ClutterTextureContent
{
GObject parent_instance;
CoglTexture *texture;
};
static void clutter_content_iface_init (ClutterContentInterface *iface);
G_DEFINE_TYPE_WITH_CODE (ClutterTextureContent, clutter_texture_content,
G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_CONTENT,
clutter_content_iface_init))
static void
clutter_texture_content_finalize (GObject *gobject)
{
ClutterTextureContent *texture_content = CLUTTER_TEXTURE_CONTENT (gobject);
g_clear_pointer (&texture_content->texture, cogl_object_unref);
G_OBJECT_CLASS (clutter_texture_content_parent_class)->finalize (gobject);
}
static void
clutter_texture_content_class_init (ClutterTextureContentClass *klass)
{
G_OBJECT_CLASS (klass)->finalize = clutter_texture_content_finalize;
}
static void
clutter_texture_content_init (ClutterTextureContent *texture_content)
{
}
static void
clutter_texture_content_paint_content (ClutterContent *content,
ClutterActor *actor,
ClutterPaintNode *root,
ClutterPaintContext *paint_context)
{
ClutterTextureContent *texture_content = CLUTTER_TEXTURE_CONTENT (content);
ClutterPaintNode *node;
node = clutter_actor_create_texture_paint_node (actor,
texture_content->texture);
clutter_paint_node_set_static_name (node, "Texture Content");
clutter_paint_node_add_child (root, node);
clutter_paint_node_unref (node);
}
static gboolean
clutter_texture_content_get_preferred_size (ClutterContent *content,
float *width,
float *height)
{
ClutterTextureContent *texture_content = CLUTTER_TEXTURE_CONTENT (content);
if (width != NULL)
*width = cogl_texture_get_width (texture_content->texture);
if (height != NULL)
*height = cogl_texture_get_height (texture_content->texture);
return TRUE;
}
static void
clutter_content_iface_init (ClutterContentInterface *iface)
{
iface->get_preferred_size = clutter_texture_content_get_preferred_size;
iface->paint_content = clutter_texture_content_paint_content;
}
/**
* clutter_texture_content_new_from_texture:
* @texture: a #CoglTexture
* @clip: (nullable): A clipping rectangle
*
* Creates a new #ClutterTextureContent instance for @texture, taking an
* internal reference to @texture.
*
* If you change the contents of the #CoglTexture you will need
* to manually invalidate the @texture_content with clutter_content_invalidate()
* in order to update the actors using @texture_content as their content.
*
* Return value: (transfer full): the newly created #ClutterTextureContent instance.
* Use g_object_unref() when done.
*/
ClutterContent *
clutter_texture_content_new_from_texture (CoglTexture *texture,
cairo_rectangle_int_t *clip)
{
ClutterTextureContent *texture_content;
g_return_val_if_fail (texture != NULL, NULL);
texture_content = g_object_new (CLUTTER_TYPE_TEXTURE_CONTENT, NULL);
if (clip)
{
texture_content->texture =
cogl_texture_new_from_sub_texture (texture,
clip->x,
clip->y,
clip->width,
clip->height);
}
else
{
texture_content->texture = cogl_object_ref (texture);
}
return CLUTTER_CONTENT (texture_content);
}
/**
* clutter_texture_content_get_texture:
* @texture_content: a #ClutterTextureContent
*
* Retrieves a pointer to the #CoglTexture used by @texture_content.
*
* If you change the contents of the returned #CoglTexture you will need
* to manually invalidate the @texture_content with clutter_content_invalidate()
* in order to update the actors using @texture_content as their content.
*
* Return value: (transfer none): a pointer to the #CoglTexture
*/
CoglTexture *
clutter_texture_content_get_texture (ClutterTextureContent *texture_content)
{
g_return_val_if_fail (CLUTTER_IS_TEXTURE_CONTENT (texture_content), NULL);
return texture_content->texture;
}

53
clutter/clutter/clutter-texture-content.h Normal file
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@ -0,0 +1,53 @@
/*
* Clutter.
*
* An OpenGL based 'interactive image' library.
*
* Copyright (C) 2012 Intel Corporation.
* Copyright (C) 2021 Robert Mader.
*
* 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>
* Robert Mader <robert.mader@posteo.de>
*/
#ifndef CLUTTER_TEXTURE_CONTENT_H
#define CLUTTER_TEXTURE_CONTENT_H
#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
#error "Only <clutter/clutter.h> can be included directly."
#endif
#include <cogl/cogl.h>
#include <clutter/clutter-types.h>
G_BEGIN_DECLS
#define CLUTTER_TYPE_TEXTURE_CONTENT (clutter_texture_content_get_type ())
CLUTTER_EXPORT
G_DECLARE_FINAL_TYPE (ClutterTextureContent, clutter_texture_content,
CLUTTER, TEXTURE_CONTENT, GObject)
CLUTTER_EXPORT
ClutterContent * clutter_texture_content_new_from_texture (CoglTexture *texture,
cairo_rectangle_int_t *clip);
CLUTTER_EXPORT
CoglTexture * clutter_texture_content_get_texture (ClutterTextureContent *texture_content);
G_END_DECLS
#endif /* CLUTTER_TEXTURE_CONTENT_H */

1
clutter/clutter/clutter.h
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@ -102,6 +102,7 @@
#include "clutter-stage-view.h"
#include "clutter-tap-action.h"
#include "clutter-text.h"
#include "clutter-texture-content.h"
#include "clutter-timeline.h"
#include "clutter-transition-group.h"
#include "clutter-transition.h"

2
clutter/clutter/meson.build
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@ -80,6 +80,7 @@ clutter_headers = [
'clutter-tap-action.h',
'clutter-text.h',
'clutter-text-buffer.h',
'clutter-texture-content.h',
'clutter-timeline.h',
'clutter-transition-group.h',
'clutter-transition.h',
@ -173,6 +174,7 @@ clutter_sources = [
'clutter-tap-action.c',
'clutter-text.c',
'clutter-text-buffer.c',
'clutter-texture-content.c',
'clutter-transition-group.c',
'clutter-transition.c',
'clutter-timeline.c',