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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2014 Red Hat
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include "config.h"
#include "meta-cursor-renderer.h"
#include "meta-cursor-private.h"
#include <meta/meta-backend.h>
#include <meta/util.h>
#include <cogl/cogl.h>
#include <clutter/clutter.h>
#include "meta-stage.h"
typedef struct
{
CoglTexture *texture;
MetaRectangle current_rect;
} MetaCursorLayer;
struct _MetaCursorRendererPrivate
{
int current_x, current_y;
MetaCursorLayer core_layer;
MetaCursorLayer dnd_layer;
MetaCursorReference *displayed_cursor;
int dnd_surface_offset_x, dnd_surface_offset_y;
gboolean cursor_handled_by_backend;
};
typedef struct _MetaCursorRendererPrivate MetaCursorRendererPrivate;
G_DEFINE_TYPE_WITH_PRIVATE (MetaCursorRenderer, meta_cursor_renderer, G_TYPE_OBJECT);
static void
queue_redraw (MetaCursorRenderer *renderer)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
MetaBackend *backend = meta_get_backend ();
ClutterActor *stage = meta_backend_get_stage (backend);
CoglTexture *texture;
/* During early initialization, we can have no stage */
if (!stage)
return;
/* Pointer cursor */
if (!priv->cursor_handled_by_backend)
texture = priv->core_layer.texture;
else
texture = NULL;
meta_stage_set_cursor (META_STAGE (stage), texture,
&priv->core_layer.current_rect);
/* DnD surface */
meta_stage_set_dnd_surface (META_STAGE (stage),
priv->dnd_layer.texture,
&priv->dnd_layer.current_rect);
}
static gboolean
meta_cursor_renderer_real_update_cursor (MetaCursorRenderer *renderer)
{
return FALSE;
}
static void
meta_cursor_renderer_class_init (MetaCursorRendererClass *klass)
{
klass->update_cursor = meta_cursor_renderer_real_update_cursor;
}
static void
meta_cursor_renderer_init (MetaCursorRenderer *renderer)
{
}
static void
update_layer (MetaCursorRenderer *renderer,
MetaCursorLayer *layer,
CoglTexture *texture,
int offset_x,
int offset_y)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
layer->texture = texture;
if (layer->texture)
{
layer->current_rect.x = priv->current_x + offset_x;
layer->current_rect.y = priv->current_y + offset_y;
layer->current_rect.width = cogl_texture_get_width (layer->texture);
layer->current_rect.height = cogl_texture_get_height (layer->texture);
}
else
{
layer->current_rect.x = 0;
layer->current_rect.y = 0;
layer->current_rect.width = 0;
layer->current_rect.height = 0;
}
}
static void
emit_update_cursor (MetaCursorRenderer *renderer,
gboolean force)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
gboolean handled_by_backend, should_redraw = FALSE;
handled_by_backend = META_CURSOR_RENDERER_GET_CLASS (renderer)->update_cursor (renderer);
if (handled_by_backend != priv->cursor_handled_by_backend)
{
priv->cursor_handled_by_backend = handled_by_backend;
should_redraw = TRUE;
}
if (force || !handled_by_backend || priv->dnd_layer.texture)
should_redraw = TRUE;
if (should_redraw)
queue_redraw (renderer);
}
static void
update_cursor (MetaCursorRenderer *renderer)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
CoglTexture *texture;
int hot_x, hot_y;
/* Cursor layer */
if (priv->displayed_cursor)
{
texture = meta_cursor_reference_get_cogl_texture (priv->displayed_cursor,
&hot_x, &hot_y);
}
else
{
texture = NULL;
hot_x = 0;
hot_y = 0;
}
update_layer (renderer, &priv->core_layer, texture, -hot_x, -hot_y);
/* The DnD surface layer will also need updating position */
update_layer (renderer, &priv->dnd_layer, priv->dnd_layer.texture,
priv->dnd_surface_offset_x, priv->dnd_surface_offset_y);
emit_update_cursor (renderer, FALSE);
}
MetaCursorRenderer *
meta_cursor_renderer_new (void)
{
return g_object_new (META_TYPE_CURSOR_RENDERER, NULL);
}
void
meta_cursor_renderer_set_cursor (MetaCursorRenderer *renderer,
MetaCursorReference *cursor)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
if (priv->displayed_cursor == cursor)
return;
priv->displayed_cursor = cursor;
update_cursor (renderer);
}
void
meta_cursor_renderer_set_dnd_surface (MetaCursorRenderer *renderer,
CoglTexture *texture,
int offset_x,
int offset_y)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
g_assert (meta_is_wayland_compositor ());
priv->dnd_surface_offset_x = offset_x;
priv->dnd_surface_offset_y = offset_y;
update_layer (renderer, &priv->dnd_layer, texture, offset_x, offset_y);
emit_update_cursor (renderer, TRUE);
}
void
meta_cursor_renderer_set_position (MetaCursorRenderer *renderer,
int x, int y)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
g_assert (meta_is_wayland_compositor ());
priv->current_x = x;
priv->current_y = y;
update_cursor (renderer);
}
MetaCursorReference *
meta_cursor_renderer_get_cursor (MetaCursorRenderer *renderer)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
return priv->displayed_cursor;
}
const MetaRectangle *
meta_cursor_renderer_get_rect (MetaCursorRenderer *renderer)
{
MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
return &priv->core_layer.current_rect;
}
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