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/* tidy-texture-reflection.c: adds a reflection on a texture
*
* Copyright (C) 2007 OpenedHand
*
* 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: Matthew Allum <mallum@o-hand.com>
*/
/**
* SECTION:tidy-texture-reflection
* @short_description: Creates a reflection of a texture
*
* #ClutterReflectTexture allows the cloning of existing #ClutterTexture with
* a reflection-like effect.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <clutter/cogl.h>
#include <clutter/clutter-util.h>
#include "tidy-texture-reflection.h"
#include "tidy-private.h"
enum
{
PROP_0,
PROP_REFLECTION_HEIGHT
};
#define TIDY_TEXTURE_REFLECTION_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
TIDY_TYPE_TEXTURE_REFLECTION, \
TidyTextureReflectionPrivate))
struct _TidyTextureReflectionPrivate
{
gint reflection_height;
};
G_DEFINE_TYPE (TidyTextureReflection,
tidy_texture_reflection,
CLUTTER_TYPE_CLONE_TEXTURE);
static void
reflect_texture_render_to_gl_quad (TidyTextureReflection *texture,
ClutterTexture *parent,
gint x1,
gint y1,
gint x2,
gint y2)
{
TidyTextureReflectionPrivate *priv = texture->priv;
gint qx1 = 0, qx2 = 0, qy1 = 0, qy2 = 0;
gint qwidth = 0, qheight = 0;
gint x, y, i =0, lastx = 0, lasty = 0;
gint n_x_tiles, n_y_tiles;
gint pwidth, pheight, rheight;
float tx, ty, ty2 = 0.0;
ClutterColor white = { 255, 255, 255, 255 };
qwidth = x2 - x1;
qheight = y2 - y1;
rheight = priv->reflection_height;
if (rheight < 0)
rheight = clutter_actor_get_height (CLUTTER_ACTOR (parent)) / 2;
if (rheight > qheight)
rheight = qheight;
/* Only paint if parent is in a state to do so */
if (!clutter_texture_has_generated_tiles (parent))
return;
clutter_texture_get_base_size (parent, &pwidth, &pheight);
if (!clutter_texture_is_tiled (parent))
{
clutter_texture_bind_tile (parent, 0);
/* NPOTS textures *always* used if extension available
*/
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
{
tx = (float) pwidth;
ty = (float) pheight;
ty2 = (float) (clutter_actor_get_height (CLUTTER_ACTOR (texture)) * rheight)
/ pheight;
ty2 = pheight - ty2;
}
else
{
tx = (float) pwidth / clutter_util_next_p2 (pwidth);
ty = (float) pheight / clutter_util_next_p2 (pheight);
}
qx1 = x1; qx2 = x2;
qy1 = y1; qy2 = y1 + rheight;
#ifdef CLUTTER_COGL_HAS_GL
glBegin (GL_QUADS);
white.alpha = clutter_actor_get_opacity (CLUTTER_ACTOR (texture));
cogl_color (&white);
glTexCoord2f (0, ty);
glVertex2i (qx1, qy1);
glTexCoord2f (tx, ty);
glVertex2i (qx2, qy1);
white.alpha = 0;
cogl_color (&white);
glTexCoord2f (tx, ty2);
glVertex2i (qx2, qy2);
glTexCoord2f (0, ty2);
glVertex2i (qx1, qy2);
glEnd ();
#else
#warning "TidyTextureReflection does not currently support GL ES"
#endif
return;
}
else
{
g_warning("TidyTextureReflection doesn't support tiled textures..");
}
/* FIXME: Below wont actually render the corrent graduated effect. */
#ifdef CLUTTER_COGL_HAS_GL
clutter_texture_get_n_tiles (parent, &n_x_tiles, &n_y_tiles);
for (x = 0; x < n_x_tiles; x++)
{
lasty = 0;
for (y = 0; y < n_y_tiles; y++)
{
gint actual_w, actual_h;
gint xpos, ypos, xsize, ysize, ywaste, xwaste;
clutter_texture_bind_tile (parent, i);
clutter_texture_get_x_tile_detail (parent, x,
&xpos, &xsize, &xwaste);
clutter_texture_get_y_tile_detail (parent, y,
&ypos, &ysize, &ywaste);
actual_w = xsize - xwaste;
actual_h = ysize - ywaste;
tx = (float) actual_w / xsize;
ty = (float) actual_h / ysize;
qx1 = x1 + lastx;
qx2 = qx1 + ((qwidth * actual_w ) / pwidth );
qy1 = y1 + lasty;
qy2 = qy1 + ((qheight * actual_h) / pheight );
glBegin (GL_QUADS);
glTexCoord2f (tx, ty); glVertex2i (qx2, qy2);
glTexCoord2f (0, ty); glVertex2i (qx1, qy2);
glTexCoord2f (0, 0); glVertex2i (qx1, qy1);
glTexCoord2f (tx, 0); glVertex2i (qx2, qy1);
glEnd ();
lasty += qy2 - qy1;
i++;
}
lastx += qx2 - qx1;
}
#endif
}
static void
tidy_texture_reflection_paint (ClutterActor *actor)
{
#ifdef CLUTTER_COGL_HAS_GL
TidyTextureReflection *texture;
ClutterCloneTexture *clone;
ClutterTexture *parent;
ClutterActorBox box = { 0, };
COGLenum target_type;
ClutterColor white = { 255, 255, 255, 255 };
texture = TIDY_TEXTURE_REFLECTION (actor);
clone = CLUTTER_CLONE_TEXTURE (actor);
parent = clutter_clone_texture_get_parent_texture (clone);
if (!parent)
return;
if (!CLUTTER_ACTOR_IS_REALIZED (parent))
clutter_actor_realize (CLUTTER_ACTOR (parent));
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE) &&
clutter_texture_is_tiled (parent) == FALSE)
{
target_type = CGL_TEXTURE_RECTANGLE_ARB;
cogl_enable (CGL_ENABLE_TEXTURE_RECT | CGL_ENABLE_BLEND);
}
else
{
target_type = CGL_TEXTURE_2D;
cogl_enable (CGL_ENABLE_TEXTURE_2D | CGL_ENABLE_BLEND);
}
cogl_push_matrix ();
white.alpha = clutter_actor_get_opacity (actor);
cogl_color (&white);
clutter_actor_query_coords (actor, &box);
reflect_texture_render_to_gl_quad (texture, parent,
0, 0,
CLUTTER_UNITS_TO_DEVICE (box.x2 - box.x1),
CLUTTER_UNITS_TO_DEVICE (box.y2 - box.y1));
cogl_pop_matrix ();
#endif
}
static void
tidy_texture_reflection_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
TidyTextureReflection *texture;
texture = TIDY_TEXTURE_REFLECTION (gobject);
switch (prop_id)
{
case PROP_REFLECTION_HEIGHT:
tidy_texture_reflection_set_reflection_height (texture,
g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
tidy_texture_reflection_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
TidyTextureReflection *texture;
texture = TIDY_TEXTURE_REFLECTION (gobject);
switch (prop_id)
{
case PROP_REFLECTION_HEIGHT:
g_value_set_int (value,
tidy_texture_reflection_get_reflection_height (texture));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
tidy_texture_reflection_class_init (TidyTextureReflectionClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
g_type_class_add_private (klass, sizeof (TidyTextureReflectionPrivate));
gobject_class->set_property = tidy_texture_reflection_set_property;
gobject_class->get_property = tidy_texture_reflection_get_property;
actor_class->paint = tidy_texture_reflection_paint;
g_object_class_install_property (gobject_class,
PROP_REFLECTION_HEIGHT,
g_param_spec_int ("reflection-height",
"Reflection Height",
"Height of the reflection, or -1",
-1, G_MAXINT, -1,
TIDY_PARAM_READWRITE));
}
static void
tidy_texture_reflection_init (TidyTextureReflection *texture)
{
TidyTextureReflectionPrivate *priv;
texture->priv = priv = TIDY_TEXTURE_REFLECTION_GET_PRIVATE (texture);
priv->reflection_height = -1;
}
ClutterActor *
tidy_texture_reflection_new (ClutterTexture *texture)
{
g_return_val_if_fail (texture == NULL || CLUTTER_IS_TEXTURE (texture), NULL);
return g_object_new (TIDY_TYPE_TEXTURE_REFLECTION,
"parent-texture", texture,
NULL);
}
void
tidy_texture_reflection_set_reflection_height (TidyTextureReflection *texture,
gint height)
{
TidyTextureReflectionPrivate *priv;
g_return_if_fail (TIDY_IS_TEXTURE_REFLECTION (texture));
priv = texture->priv;
if (priv->reflection_height != height)
{
priv->reflection_height = height;
if (CLUTTER_ACTOR_IS_VISIBLE (texture))
clutter_actor_queue_redraw (CLUTTER_ACTOR (texture));
g_object_notify (G_OBJECT (texture), "reflection-height");
}
}
gint
tidy_texture_reflection_get_reflection_height (TidyTextureReflection *texture)
{
g_return_val_if_fail (TIDY_IS_TEXTURE_REFLECTION (texture), -1);
return texture->priv->reflection_height;
}
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