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mutter/clutter/clutter-texture.c
Emmanuele Bassi d7caae7f6a 2007-07-04 Emmanuele Bassi <ebassi@openedhand.com> 
* clutter/*: Loads of fixes for the API reference.
2007-07-04 14:00:41 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-texture
* @short_description: An actor for displaying and manipulating images.
*
* #ClutterTexture is a base class for displaying and manipulating pixel
* buffer type data.
*
* The #clutter_texture_set_from_rgb_data and #clutter_texture_set_pixbuf are
* used to copy image data into texture memory and subsequently realize the
* the texture.
*
* If texture reads are supported by underlying GL implementaion
* Unrealizing/hiding frees image data from texture memory moving to main
* system memory. Re-realizing then performs the opposite operation.
* This process allows basic management of commonly limited available texture
* memory.
*/
#include "config.h"
#include "clutter-texture.h"
#include "clutter-main.h"
#include "clutter-marshal.h"
#include "clutter-feature.h"
#include "clutter-util.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include "clutter-fixed.h"
#include "cogl.h"
G_DEFINE_TYPE (ClutterTexture, clutter_texture, CLUTTER_TYPE_ACTOR);
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define PIXEL_TYPE CGL_UNSIGNED_BYTE
#else
#define PIXEL_TYPE CGL_UNSIGNED_INT_8_8_8_8_REV
#endif
typedef struct {
gint pos;
gint size;
gint waste;
} ClutterTextureTileDimension;
struct _ClutterTexturePrivate
{
gint width;
gint height;
COGLenum pixel_format;
COGLenum pixel_type;
COGLenum target_type;
GdkPixbuf *local_pixbuf; /* non video memory copy */
guint sync_actor_size : 1;
gint max_tile_waste;
guint filter_quality;
guint repeat_x : 1; /* non working */
guint repeat_y : 1; /* non working */
guint is_tiled : 1;
ClutterTextureTileDimension *x_tiles;
ClutterTextureTileDimension *y_tiles;
gint n_x_tiles;
gint n_y_tiles;
guint *tiles;
};
enum
{
PROP_0,
PROP_PIXBUF,
PROP_USE_TILES,
PROP_MAX_TILE_WASTE,
PROP_PIXEL_TYPE, /* Texture type */
PROP_PIXEL_FORMAT, /* Texture format */
PROP_SYNC_SIZE,
PROP_REPEAT_Y,
PROP_REPEAT_X,
PROP_FILTER_QUALITY
};
enum
{
SIZE_CHANGE,
PIXBUF_CHANGE,
LAST_SIGNAL
};
static int texture_signals[LAST_SIGNAL] = { 0 };
static guchar*
un_pre_multiply_alpha (const guchar *data,
gint width,
gint height,
gint rowstride)
{
gint x,y;
unsigned char *ret, *dst, *src;
ret = dst = g_malloc(sizeof(guchar) * height * rowstride);
/* FIXME: Optimise */
for (y = 0; y < height; y++)
{
src = (guchar*)data + y * rowstride;
for (x = 0; x < width; x++)
{
guchar alpha = src[3];
if (alpha == 0)
{
src[0] = src[1] = src[2] = src[3] = alpha;
}
else
{
dst[0] = (((src[0] >> 16) & 0xff) * 255 ) / alpha;
dst[1] = (((src[1] >> 8) & 0xff) * 255 ) / alpha;
dst[2] = (((src[2] >> 0) & 0xff) * 255 ) / alpha;
dst[3] = alpha;
}
dst += 4;
src += 4;
}
}
return ret;
}
#ifndef HAVE_COGL_GL
static guchar *
rgb_to_bgr (const guchar *data,
gboolean has_alpha,
gint width,
gint height,
gint rowstride)
{
gint x,y, bpp = 4;
unsigned char *ret, *dst, *src;
ret = dst = g_malloc(sizeof(guchar) * height * rowstride);
if (!has_alpha)
bpp = 3;
/* FIXME: Optimise */
for (y = 0; y < height; y++)
{
src = (guchar*)data + y * rowstride;
for (x = 0; x < width; x++)
{
dst[0] = src[2];
dst[1] = src[1];
dst[2] = src[0];
if (has_alpha)
dst[3] = src[3];
dst += bpp;
src += bpp;
}
}
return ret;
}
#endif /* !HAVE_COGL_GL */
static int
tile_dimension (int to_fill,
int start_size,
int waste,
ClutterTextureTileDimension *tiles)
{
int pos = 0;
int n_tiles = 0;
int size = start_size;
while (TRUE)
{
if (tiles)
{
tiles[n_tiles].pos = pos;
tiles[n_tiles].size = size;
tiles[n_tiles].waste = 0;
}
n_tiles++;
if (to_fill <= size)
{
if (tiles)
tiles[n_tiles-1].waste = size - to_fill;
break;
}
else
{
to_fill -= size; pos += size;
while (size >= 2 * to_fill || size - to_fill > waste)
size /= 2;
}
}
return n_tiles;
}
static void
texture_init_tiles (ClutterTexture *texture)
{
ClutterTexturePrivate *priv;
gint x_pot, y_pot;
priv = texture->priv;
x_pot = clutter_util_next_p2 (priv->width);
y_pot = clutter_util_next_p2 (priv->height);
while (!(cogl_texture_can_size (CGL_TEXTURE_2D,
priv->pixel_format,
priv->pixel_type,
x_pot, y_pot)
&& (x_pot - priv->width < priv->max_tile_waste)
&& (y_pot - priv->height < priv->max_tile_waste)))
{
CLUTTER_NOTE (TEXTURE, "x_pot:%i - width:%i < max_waste:%i",
x_pot,
priv->width,
priv->max_tile_waste);
CLUTTER_NOTE (TEXTURE, "y_pot:%i - height:%i < max_waste:%i",
y_pot,
priv->height,
priv->max_tile_waste);
if (x_pot > y_pot)
x_pot /= 2;
else
y_pot /= 2;
g_return_if_fail (x_pot != 0 || y_pot != 0);
}
if (priv->x_tiles)
g_free(priv->x_tiles);
priv->n_x_tiles = tile_dimension (priv->width, x_pot,
priv->max_tile_waste, NULL);
priv->x_tiles = g_new (ClutterTextureTileDimension, priv->n_x_tiles);
tile_dimension (priv->width, x_pot, priv->max_tile_waste, priv->x_tiles);
if (priv->y_tiles)
g_free(priv->y_tiles);
priv->n_y_tiles = tile_dimension (priv->height, y_pot,
priv->max_tile_waste, NULL);
priv->y_tiles = g_new (ClutterTextureTileDimension, priv->n_y_tiles);
tile_dimension (priv->height, y_pot, priv->max_tile_waste, priv->y_tiles);
CLUTTER_NOTE (TEXTURE,
"x_pot:%i, width:%i, y_pot:%i, height: %i "
"max_waste:%i, n_x_tiles: %i, n_y_tiles: %i",
x_pot, priv->width, y_pot, priv->height,
priv->max_tile_waste,
priv->n_x_tiles, priv->n_y_tiles);
}
static void
texture_render_to_gl_quad (ClutterTexture *texture,
int x1,
int y1,
int x2,
int y2)
{
int qx1 = 0, qx2 = 0, qy1 = 0, qy2 = 0;
int qwidth = 0, qheight = 0;
int x, y, i =0, lastx = 0, lasty = 0;
float tx, ty;
ClutterTexturePrivate *priv;
priv = texture->priv;
qwidth = x2-x1;
qheight = y2-y1;
if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR(texture)))
clutter_actor_realize (CLUTTER_ACTOR(texture));
g_return_if_fail(priv->tiles != NULL);
if (!priv->is_tiled)
{
cogl_texture_bind (priv->target_type, priv->tiles[0]);
if (priv->target_type == CGL_TEXTURE_2D) /* POT */
{
tx = (float) priv->width / clutter_util_next_p2 (priv->width);
ty = (float) priv->height / clutter_util_next_p2 (priv->height);
}
else
{
tx = (float) priv->width;
ty = (float) priv->height;
}
qx1 = x1; qx2 = x2;
qy1 = y1; qy2 = y2;
cogl_texture_quad (x1, x2, y1, y2,
0,
0,
CLUTTER_FLOAT_TO_FIXED (tx),
CLUTTER_FLOAT_TO_FIXED (ty));
return;
}
for (x=0; x < priv->n_x_tiles; x++)
{
lasty = 0;
for (y=0; y < priv->n_y_tiles; y++)
{
int actual_w, actual_h;
cogl_texture_bind (priv->target_type, priv->tiles[i]);
actual_w = priv->x_tiles[x].size - priv->x_tiles[x].waste;
actual_h = priv->y_tiles[y].size - priv->y_tiles[y].waste;
CLUTTER_NOTE (TEXTURE,
"rendering text tile x: %i, y: %i - %ix%i",
x, y, actual_w, actual_h);
tx = (float) actual_w / priv->x_tiles[x].size;
ty = (float) actual_h / priv->y_tiles[y].size;
qx1 = x1 + lastx;
qx2 = qx1 + ((qwidth * actual_w ) / priv->width );
qy1 = y1 + lasty;
qy2 = qy1 + ((qheight * actual_h) / priv->height );
cogl_texture_quad (qx1, qx2, qy1, qy2,
0,
0,
CLUTTER_FLOAT_TO_FIXED (tx),
CLUTTER_FLOAT_TO_FIXED (ty));
lasty += (qy2 - qy1) ;
i++;
}
lastx += (qx2 - qx1);
}
}
static void
texture_free_gl_resources (ClutterTexture *texture)
{
ClutterTexturePrivate *priv;
priv = texture->priv;
CLUTTER_MARK();
if (priv->tiles)
{
if (!priv->is_tiled)
cogl_textures_destroy (1, priv->tiles);
else
cogl_textures_destroy (priv->n_x_tiles * priv->n_y_tiles, priv->tiles);
g_free(priv->tiles);
priv->tiles = NULL;
}
if (priv->x_tiles)
{
g_free(priv->x_tiles);
priv->x_tiles = NULL;
}
if (priv->y_tiles)
{
g_free(priv->y_tiles);
priv->y_tiles = NULL;
}
}
static void
texture_upload_data (ClutterTexture *texture,
const guchar *data,
gboolean has_alpha,
gint width,
gint height,
gint rowstride,
gint bpp)
{
ClutterTexturePrivate *priv;
gint x, y;
gint i = 0;
gboolean create_textures = FALSE;
GdkPixbuf *master_pixbuf = NULL;
priv = texture->priv;
g_return_if_fail (data != NULL);
CLUTTER_MARK();
if (!priv->is_tiled)
{
/* Single Texture */
if (!priv->tiles)
{
priv->tiles = g_new (guint, 1);
glGenTextures (1, priv->tiles);
create_textures = TRUE;
}
CLUTTER_NOTE (TEXTURE, "syncing for single tile");
cogl_texture_bind (priv->target_type, priv->tiles[0]);
cogl_texture_set_alignment (priv->target_type, 4, priv->width);
cogl_texture_set_filters
(priv->target_type,
priv->filter_quality ? CGL_LINEAR : CGL_NEAREST,
priv->filter_quality ? CGL_LINEAR : CGL_NEAREST);
cogl_texture_set_wrap (priv->target_type,
priv->repeat_x ? CGL_REPEAT : CGL_CLAMP_TO_EDGE,
priv->repeat_y ? CGL_REPEAT : CGL_CLAMP_TO_EDGE);
priv->filter_quality = 1;
if (create_textures)
{
gint width, height;
width = priv->width;
height = priv->height;
if (priv->target_type == CGL_TEXTURE_2D) /* POT */
{
width = clutter_util_next_p2(priv->width);
height = clutter_util_next_p2(priv->height);
}
cogl_texture_image_2d (priv->target_type,
CGL_RGBA,
width,
height,
priv->pixel_format,
priv->pixel_type,
NULL);
}
cogl_texture_sub_image_2d (priv->target_type,
0,
0,
width,
height,
priv->pixel_format,
priv->pixel_type,
data);
return;
}
/* Multiple tiled texture */
CLUTTER_NOTE (TEXTURE,
"syncing for multiple tiles for %ix%i pixbuf",
priv->width, priv->height);
g_return_if_fail (priv->x_tiles != NULL && priv->y_tiles != NULL);
master_pixbuf = gdk_pixbuf_new_from_data (data,
GDK_COLORSPACE_RGB,
has_alpha,
8,
width, height, rowstride,
NULL, NULL);
if (priv->tiles == NULL)
{
priv->tiles = g_new (guint, priv->n_x_tiles * priv->n_y_tiles);
glGenTextures (priv->n_x_tiles * priv->n_y_tiles, priv->tiles);
create_textures = TRUE;
}
for (x = 0; x < priv->n_x_tiles; x++)
for (y = 0; y < priv->n_y_tiles; y++)
{
GdkPixbuf *pixtmp;
gint src_h, src_w;
src_w = priv->x_tiles[x].size;
src_h = priv->y_tiles[y].size;
pixtmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
has_alpha,
8,
src_w, src_h);
/* clip */
if (priv->x_tiles[x].pos + src_w > priv->width)
src_w = priv->width - priv->x_tiles[x].pos;
if (priv->y_tiles[y].pos + src_h > priv->height)
src_h = priv->height - priv->y_tiles[y].pos;
gdk_pixbuf_copy_area (master_pixbuf,
priv->x_tiles[x].pos,
priv->y_tiles[y].pos,
src_w,
src_h,
pixtmp,
0, 0);
#ifdef CLUTTER_DUMP_TILES
{
gchar *filename;
filename = g_strdup_printf("/tmp/%i-%i-%i.png",
clutter_actor_get_id(CLUTTER_ACTOR(texture)),
x, y);
printf("saving %s\n", filename);
gdk_pixbuf_save (pixtmp, filename , "png", NULL, NULL);
}
#endif
cogl_texture_bind (priv->target_type, priv->tiles[i]);
cogl_texture_set_alignment (priv->target_type, 4, src_w);
cogl_texture_set_filters
(priv->target_type,
priv->filter_quality ? CGL_LINEAR : CGL_NEAREST,
priv->filter_quality ? CGL_LINEAR : CGL_NEAREST);
cogl_texture_set_wrap (priv->target_type,
priv->repeat_x ? CGL_REPEAT : CGL_CLAMP_TO_EDGE,
priv->repeat_y ? CGL_REPEAT : CGL_CLAMP_TO_EDGE);
if (create_textures)
{
cogl_texture_image_2d (priv->target_type,
CGL_RGBA,
gdk_pixbuf_get_width (pixtmp),
gdk_pixbuf_get_height (pixtmp),
priv->pixel_format,
priv->pixel_type,
gdk_pixbuf_get_pixels (pixtmp));
}
else
{
/* Textures already created, so just update whats inside
*/
cogl_texture_sub_image_2d (priv->target_type,
0,
0,
gdk_pixbuf_get_width (pixtmp),
gdk_pixbuf_get_height (pixtmp),
priv->pixel_format,
priv->pixel_type,
gdk_pixbuf_get_pixels (pixtmp));
}
g_object_unref (pixtmp);
i++;
}
g_object_unref (master_pixbuf);
}
static void
clutter_texture_unrealize (ClutterActor *actor)
{
ClutterTexture *texture;
ClutterTexturePrivate *priv;
texture = CLUTTER_TEXTURE(actor);
priv = texture->priv;
if (priv->tiles == NULL)
return;
CLUTTER_MARK();
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_READ_PIXELS))
{
/* Move image data from video to main memory.
* GL/ES cant do this - it probably makes sense
* to move this kind of thing into a ClutterProxyTexture
* where this behaviour can be better controlled.
*
* Or make it controllable via a property.
*/
if (priv->local_pixbuf == NULL)
{
priv->local_pixbuf = clutter_texture_get_pixbuf (texture);
CLUTTER_NOTE (TEXTURE, "moved pixels into system (pixbuf) mem");
}
texture_free_gl_resources (texture);
}
CLUTTER_NOTE (TEXTURE, "Texture unrealized");
}
static void
clutter_texture_realize (ClutterActor *actor)
{
ClutterTexture *texture;
ClutterTexturePrivate *priv;
texture = CLUTTER_TEXTURE(actor);
priv = texture->priv;
CLUTTER_MARK();
if (priv->local_pixbuf != NULL)
{
/* Move any local image data we have from unrealization
* back into video memory.
*/
clutter_texture_set_pixbuf (texture, priv->local_pixbuf, NULL);
g_object_unref (priv->local_pixbuf);
priv->local_pixbuf = NULL;
}
else
{
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_READ_PIXELS))
{
/* Dont allow realization with no pixbuf - note set_pixbuf/data
* will set realize flags.
*/
CLUTTER_NOTE (TEXTURE,
"Texture has no image data cannot realize");
CLUTTER_NOTE (TEXTURE, "flags %i", actor->flags);
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
CLUTTER_NOTE (TEXTURE, "flags %i", actor->flags);
return;
}
}
CLUTTER_NOTE (TEXTURE, "Texture realized");
}
static void
clutter_texture_show (ClutterActor *self)
{
ClutterActorClass *parent_class;
/* chain up parent show */
parent_class = CLUTTER_ACTOR_CLASS (clutter_texture_parent_class);
if (parent_class->show)
parent_class->show (self);
clutter_actor_realize (self);
}
static void
clutter_texture_hide (ClutterActor *self)
{
ClutterActorClass *parent_class;
/* chain up parent hide */
parent_class = CLUTTER_ACTOR_CLASS (clutter_texture_parent_class);
if (parent_class->hide)
parent_class->hide (self);
clutter_actor_unrealize (self);
}
static void
clutter_texture_paint (ClutterActor *self)
{
ClutterTexture *texture = CLUTTER_TEXTURE (self);
gint x1, y1, x2, y2;
ClutterColor col = { 0xff, 0xff, 0xff, 0xff };
CLUTTER_NOTE (PAINT,
"painting texture '%s'",
clutter_actor_get_name (self) ? clutter_actor_get_name (self)
: "unknown");
cogl_push_matrix ();
switch (texture->priv->target_type)
{
case CGL_TEXTURE_2D:
cogl_enable (CGL_ENABLE_TEXTURE_2D|CGL_ENABLE_BLEND);
break;
case CGL_TEXTURE_RECTANGLE_ARB:
cogl_enable (CGL_ENABLE_TEXTURE_RECT|CGL_ENABLE_BLEND);
break;
default:
break;
}
col.alpha = clutter_actor_get_opacity (self);
cogl_color (&col);
clutter_actor_get_coords (self, &x1, &y1, &x2, &y2);
CLUTTER_NOTE (PAINT, "paint to x1: %i, y1: %i x2: %i, y2: %i "
"opacity: %i",
x1, y1, x2, y2,
clutter_actor_get_opacity (self));
/* Paint will of translated us */
texture_render_to_gl_quad (texture, 0, 0, x2 - x1, y2 - y1);
cogl_pop_matrix ();
}
static void
clutter_texture_dispose (GObject *object)
{
ClutterTexture *texture = CLUTTER_TEXTURE(object);
ClutterTexturePrivate *priv;
priv = texture->priv;
if (priv != NULL)
{
texture_free_gl_resources (texture);
if (priv->local_pixbuf != NULL)
{
g_object_unref (priv->local_pixbuf);
priv->local_pixbuf = NULL;
}
}
G_OBJECT_CLASS (clutter_texture_parent_class)->dispose (object);
}
static void
clutter_texture_finalize (GObject *object)
{
ClutterTexture *self = CLUTTER_TEXTURE(object);
if (self->priv)
{
g_free(self->priv);
self->priv = NULL;
}
G_OBJECT_CLASS (clutter_texture_parent_class)->finalize (object);
}
static void
clutter_texture_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterTexture *texture;
ClutterTexturePrivate *priv;
texture = CLUTTER_TEXTURE(object);
priv = texture->priv;
switch (prop_id)
{
case PROP_PIXBUF:
clutter_texture_set_pixbuf (texture,
(GdkPixbuf*)g_value_get_pointer(value),
NULL);
break;
case PROP_USE_TILES:
priv->is_tiled = g_value_get_boolean (value);
if (priv->target_type == CGL_TEXTURE_RECTANGLE_ARB && priv->is_tiled)
priv->target_type = CGL_TEXTURE_2D;
CLUTTER_NOTE (TEXTURE, "Texture is tiled ? %s",
priv->is_tiled ? "yes" : "no");
break;
case PROP_MAX_TILE_WASTE:
priv->max_tile_waste = g_value_get_int (value);
break;
case PROP_SYNC_SIZE:
priv->sync_actor_size = g_value_get_boolean (value);
break;
case PROP_REPEAT_X:
priv->repeat_x = g_value_get_boolean (value);
break;
case PROP_REPEAT_Y:
priv->repeat_y = g_value_get_boolean (value);
break;
case PROP_FILTER_QUALITY:
priv->filter_quality = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_texture_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterTexture *texture;
ClutterTexturePrivate *priv;
texture = CLUTTER_TEXTURE(object);
priv = texture->priv;
switch (prop_id)
{
case PROP_PIXBUF:
{
GdkPixbuf *pixb;
pixb = clutter_texture_get_pixbuf (texture);
g_value_set_pointer (value, pixb);
}
break;
case PROP_USE_TILES:
g_value_set_boolean (value, priv->is_tiled);
break;
case PROP_MAX_TILE_WASTE:
g_value_set_int (value, priv->max_tile_waste);
break;
case PROP_PIXEL_TYPE:
g_value_set_int (value, priv->pixel_type);
break;
case PROP_PIXEL_FORMAT:
g_value_set_int (value, priv->pixel_format);
break;
case PROP_SYNC_SIZE:
g_value_set_boolean (value, priv->sync_actor_size);
break;
case PROP_REPEAT_X:
g_value_set_boolean (value, priv->repeat_x);
break;
case PROP_REPEAT_Y:
g_value_set_boolean (value, priv->repeat_y);
break;
case PROP_FILTER_QUALITY:
g_value_set_int (value, priv->filter_quality);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_texture_class_init (ClutterTextureClass *klass)
{
GObjectClass *gobject_class;
ClutterActorClass *actor_class;
gobject_class = (GObjectClass*)klass;
actor_class = (ClutterActorClass*)klass;
actor_class->paint = clutter_texture_paint;
actor_class->realize = clutter_texture_realize;
actor_class->unrealize = clutter_texture_unrealize;
actor_class->show = clutter_texture_show;
actor_class->hide = clutter_texture_hide;
gobject_class->dispose = clutter_texture_dispose;
gobject_class->finalize = clutter_texture_finalize;
gobject_class->set_property = clutter_texture_set_property;
gobject_class->get_property = clutter_texture_get_property;
g_object_class_install_property
(gobject_class, PROP_PIXBUF,
g_param_spec_pointer ("pixbuf",
"Pixbuf source for Texture.",
"Pixbuf source for Texture.",
CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_USE_TILES,
g_param_spec_boolean ("tiled",
"Enable use of tiled textures",
"Enables the use of tiled GL textures to more "
"efficiently use available texture memory",
/* FIXME: This default set at runtime :/
* As tiling depends on what GL features available.
* Need to figure out better solution
*/
(clutter_feature_available
(CLUTTER_FEATURE_TEXTURE_RECTANGLE) == FALSE),
G_PARAM_CONSTRUCT_ONLY | CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_SYNC_SIZE,
g_param_spec_boolean ("sync-size",
"Sync size of actor",
"Auto sync size of actor to underlying pixbuf"
"dimentions",
TRUE,
G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_REPEAT_X,
g_param_spec_boolean ("repeat-x",
"Tile underlying pixbuf in x direction",
"Reapeat underlying pixbuf rather than scale"
"in x direction. Currently UNWORKING",
FALSE,
G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_REPEAT_Y,
g_param_spec_boolean ("repeat-y",
"Tile underlying pixbuf in y direction",
"Reapeat underlying pixbuf rather than scale"
"in y direction. Currently UNWORKING",
FALSE,
G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE));
/* FIXME: Ideally this option needs to have some kind of global
* overide as to imporve performance.
*/
g_object_class_install_property
(gobject_class, PROP_FILTER_QUALITY,
g_param_spec_int ("filter-quality",
"Quality of filter used when scaling a texture",
"Values 0 and 1 current only supported, with 0"
"being lower quality but fast, 1 being better "
"quality but slower. ( Currently just maps to "
" GL_NEAREST / GL_LINEAR )",
0,
G_MAXINT,
1,
G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_MAX_TILE_WASTE,
g_param_spec_int ("tile-waste",
"Tile dimention to waste",
"Max wastage dimention of a texture when using "
"tiled textures. Bigger values use less textures, "
"smaller values less texture memory. ",
0,
G_MAXINT,
64,
G_PARAM_CONSTRUCT_ONLY | CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_PIXEL_TYPE,
g_param_spec_int ("pixel-type",
"Texture Pixel Type",
"GL texture pixel type used",
0,
G_MAXINT,
PIXEL_TYPE,
G_PARAM_READABLE));
g_object_class_install_property
(gobject_class, PROP_PIXEL_FORMAT,
g_param_spec_int ("pixel-format",
"Texture pixel format",
"GL texture pixel format used",
0,
G_MAXINT,
CGL_RGBA,
G_PARAM_READABLE));
/**
* ClutterTexture::size-change:
* @texture: the texture which received the signal
* @width: the width of the new texture
* @height: the height of the new texture
*
* The ::size-change signal is emitted each time the size of the
* pixbuf used by @texture changes. The new size is given as
* argument to the callback.
*/
texture_signals[SIZE_CHANGE] =
g_signal_new ("size-change",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterTextureClass, size_change),
NULL, NULL,
clutter_marshal_VOID__INT_INT,
G_TYPE_NONE,
2, G_TYPE_INT, G_TYPE_INT);
/**
* ClutterTexture::pixbuf-change:
* @texture: the texture which received the signal
*
* The ::pixbuf-change signal is emitted each time the pixbuf
* used by @texture changes.
*/
texture_signals[PIXBUF_CHANGE] =
g_signal_new ("pixbuf-change",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterTextureClass, pixbuf_change),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
}
static void
clutter_texture_init (ClutterTexture *self)
{
ClutterTexturePrivate *priv;
priv = g_new0 (ClutterTexturePrivate, 1);
priv->max_tile_waste = 64;
priv->filter_quality = 0;
priv->is_tiled = TRUE;
priv->pixel_type = PIXEL_TYPE;
priv->pixel_format = CGL_RGBA;
priv->repeat_x = FALSE;
priv->repeat_y = FALSE;
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
{
priv->target_type = CGL_TEXTURE_RECTANGLE_ARB;
priv->is_tiled = FALSE;
}
else
priv->target_type = CGL_TEXTURE_2D;
self->priv = priv;
}
static void
pixbuf_destroy_notify (guchar *pixels, gpointer data)
{
g_free (pixels);
}
/**
* clutter_texture_get_pixbuf:
* @texture: A #ClutterTexture
*
* Gets a #GdkPixbuf representation of the #ClutterTexture data.
* The created #GdkPixbuf is not owned by the texture but the caller.
*
* Return value: A #GdkPixbuf
**/
GdkPixbuf*
clutter_texture_get_pixbuf (ClutterTexture* texture)
{
#if HAVE_COGL_GL
ClutterTexturePrivate *priv;
GdkPixbuf *pixbuf = NULL;
guchar *pixels = NULL;
int bpp = 4;
priv = texture->priv;
if (priv->tiles == NULL)
return NULL;
if (priv->pixel_format == CGL_YCBCR_MESA)
return NULL; /* FIXME: convert YUV */
if (priv->pixel_format == CGL_RGB || priv->pixel_format == CGL_BGR)
bpp = 3;
if (!priv->is_tiled)
{
pixels = g_malloc (((priv->width * bpp + 3) &~ 3) * priv->height);
if (!pixels)
return NULL;
glBindTexture(priv->target_type, priv->tiles[0]);
glPixelStorei (GL_UNPACK_ROW_LENGTH, priv->width);
glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
/* read data from gl text and return as pixbuf */
/* No such func in gles... */
glGetTexImage (priv->target_type,
0,
(priv->pixel_format == CGL_RGBA
|| priv->pixel_format == CGL_BGRA) ?
CGL_RGBA : CGL_RGB,
PIXEL_TYPE,
(GLvoid*)pixels);
pixbuf = gdk_pixbuf_new_from_data ((const guchar*)pixels,
GDK_COLORSPACE_RGB,
(priv->pixel_format == CGL_RGBA
|| priv->pixel_format == CGL_BGRA),
8,
priv->width,
priv->height,
((priv->width * bpp + 3) &~ 3),
pixbuf_destroy_notify,
NULL);
}
else
{
int x,y,i;
i = 0;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
(priv->pixel_format == CGL_RGBA
|| priv->pixel_format == CGL_BGRA),
8,
priv->width,
priv->height);
for (x = 0; x < priv->n_x_tiles; x++)
for (y = 0; y < priv->n_y_tiles; y++)
{
GdkPixbuf *tmp_pixb;
gint src_h, src_w;
src_w = priv->x_tiles[x].size;
src_h = priv->y_tiles[y].size;
pixels = g_malloc (((src_w * bpp) &~ 3) * src_h);
glBindTexture(priv->target_type, priv->tiles[i]);
glPixelStorei (GL_UNPACK_ROW_LENGTH, src_w);
glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
glGetTexImage (priv->target_type,
0,
(priv->pixel_format == CGL_RGBA
|| priv->pixel_format == CGL_BGRA) ?
CGL_RGBA : CGL_RGB,
PIXEL_TYPE,
(GLvoid *) pixels);
/* Clip */
if (priv->x_tiles[x].pos + src_w > priv->width)
src_w = priv->width - priv->x_tiles[x].pos;
if (priv->y_tiles[y].pos + src_h > priv->height)
src_h = priv->height - priv->y_tiles[y].pos;
tmp_pixb =
gdk_pixbuf_new_from_data ((const guchar*)pixels,
GDK_COLORSPACE_RGB,
(priv->pixel_format == CGL_RGBA
|| priv->pixel_format == CGL_BGRA),
8,
src_w,
src_h,
((src_w * bpp + 3) &~ 3),
pixbuf_destroy_notify,
NULL);
gdk_pixbuf_copy_area (tmp_pixb,
0,
0,
src_w,
src_h,
pixbuf,
priv->x_tiles[x].pos,
priv->x_tiles[y].pos);
g_object_unref (tmp_pixb);
i++;
}
}
return pixbuf;
#else
/* FIXME: func call wont work for GLES...
* features need to reflect this.
*/
return NULL;
#endif
}
/**
* clutter_texture_set_from_rgb_data:
* @texture: A #ClutterTexture
* @data: Image data in RGB type colorspace.
* @has_alpha: Set to TRUE if image data has a alpha channel.
* @width: Width in pixels of image data.
* @height: Height in pixels of image data
* @rowstride: Distance in bytes between row starts.
* @bpp: bytes per pixel ( Currently only 4 supported )
* @flags: #ClutterTextureFlags
* @error: FIXME.
*
* Sets #ClutterTexture image data.
*
* Return value: TRUE on success, FALSE on failure.
*
* Since 0.4. This function is likely to change in future versions.
**/
gboolean
clutter_texture_set_from_rgb_data (ClutterTexture *texture,
const guchar *data,
gboolean has_alpha,
gint width,
gint height,
gint rowstride,
gint bpp,
ClutterTextureFlags flags,
GError **error)
{
ClutterTexturePrivate *priv;
gboolean texture_dirty = TRUE, size_change = FALSE;
COGLenum prev_format;
guchar *copy_data = NULL;
priv = texture->priv;
g_return_val_if_fail (data != NULL, FALSE);
/* Needed for GL_RGBA (internal format) and gdk pixbuf usage */
g_return_val_if_fail (bpp == 4, FALSE);
texture_dirty = size_change = (width != priv->width
|| height != priv->height);
prev_format = priv->pixel_format;
if (has_alpha)
priv->pixel_format = CGL_RGBA;
else
priv->pixel_format = CGL_RGB;
if (flags & CLUTTER_TEXTURE_RGB_FLAG_BGR)
{
#if HAVE_COGL_GL
if (has_alpha)
priv->pixel_format = CGL_BGRA;
else
priv->pixel_format = CGL_BGR;
#else
/* GLES has no BGR format*/
copy_data = rgb_to_bgr (data, has_alpha, width, height, rowstride);
#endif /* HAVE_COGL_GL */
}
if (flags & CLUTTER_TEXTURE_RGB_FLAG_PREMULT)
copy_data = un_pre_multiply_alpha (data, width, height, rowstride);
if (prev_format != priv->pixel_format || priv->pixel_type != PIXEL_TYPE)
texture_dirty = TRUE;
priv->pixel_type = PIXEL_TYPE;
priv->width = width;
priv->height = height;
if (texture_dirty)
{
texture_free_gl_resources (texture);
if (priv->is_tiled == FALSE)
{
if (priv->target_type == CGL_TEXTURE_RECTANGLE_ARB
&& !cogl_texture_can_size (CGL_TEXTURE_RECTANGLE_ARB,
priv->pixel_format,
priv->pixel_type,
priv->width,
priv->height))
{
/* If we cant create NPOT tex of this size fall back to tiles */
CLUTTER_NOTE (TEXTURE,
"Cannot make npots of size %ix%i "
"falling back to tiled",
priv->width,
priv->height);
priv->target_type = CGL_TEXTURE_2D;
}
if (priv->target_type == CGL_TEXTURE_2D
&& !cogl_texture_can_size (CGL_TEXTURE_2D,
priv->pixel_format,
priv->pixel_type,
clutter_util_next_p2(priv->width),
clutter_util_next_p2(priv->height)))
{
priv->is_tiled = TRUE;
}
}
/* Figure our tiling etc */
if (priv->is_tiled)
texture_init_tiles (texture);
}
CLUTTER_NOTE (TEXTURE, "set size %ix%i\n",
priv->width,
priv->height);
/* Set Error from this */
texture_upload_data (texture,
copy_data != NULL ? copy_data : data,
has_alpha,
width,
height,
rowstride,
bpp);
CLUTTER_ACTOR_SET_FLAGS (CLUTTER_ACTOR (texture), CLUTTER_ACTOR_REALIZED);
if (size_change)
{
g_signal_emit (texture, texture_signals[SIZE_CHANGE],
0, priv->width, priv->height);
if (priv->sync_actor_size)
clutter_actor_set_size (CLUTTER_ACTOR(texture),
priv->width,
priv->height);
}
/* rename signal */
g_signal_emit (texture, texture_signals[PIXBUF_CHANGE], 0);
/* If resized actor may need resizing but paint() will do this */
if (CLUTTER_ACTOR_IS_MAPPED (CLUTTER_ACTOR(texture)))
clutter_actor_queue_redraw (CLUTTER_ACTOR(texture));
if (copy_data != NULL)
g_free (copy_data);
return TRUE;
}
/**
* clutter_texture_set_from_yuv_data:
* @texture: A #ClutterTexture
* @data: Image data in RGB type colorspace.
* @width: Width in pixels of image data.
* @height: Height in pixels of image data
* @flags: #ClutterTextureFlags
* @error: FIXME.
*
* Sets a #ClutterTexture from YUV image data.
*
* Return value: TRUE on success, FALSE on failure.
*
* Since 0.4. This function is likely to change in future versions.
**/
gboolean
clutter_texture_set_from_yuv_data (ClutterTexture *texture,
const guchar *data,
gint width,
gint height,
ClutterTextureFlags flags,
GError **error)
{
ClutterTexturePrivate *priv;
gboolean texture_dirty = TRUE, size_change = FALSE;
if (!clutter_feature_available(CLUTTER_FEATURE_TEXTURE_YUV))
return FALSE;
priv = texture->priv;
/* FIXME: check other image props */
size_change = (width != priv->width || height != priv->height);
texture_dirty = size_change || (priv->pixel_format != CGL_YCBCR_MESA);
priv->width = width;
priv->height = height;
priv->pixel_type = (flags & CLUTTER_TEXTURE_YUV_FLAG_YUV2) ?
CGL_UNSIGNED_SHORT_8_8_REV_MESA :
CGL_UNSIGNED_SHORT_8_8_MESA;
priv->pixel_format = CGL_YCBCR_MESA;
priv->target_type = CGL_TEXTURE_2D;
if (texture_dirty)
texture_free_gl_resources (texture);
if (!priv->tiles)
{
priv->tiles = g_new (guint, 1);
glGenTextures (1, priv->tiles);
}
cogl_texture_bind (priv->target_type, priv->tiles[0]);
cogl_texture_set_filters (priv->target_type,
priv->filter_quality ? CGL_LINEAR : CGL_NEAREST,
priv->filter_quality ? CGL_LINEAR : CGL_NEAREST);
if (texture_dirty)
{
/* FIXME: need to check size limits correctly - does not
* seem to work if correct format and typre are used so
* this is really a guess...
*/
if (cogl_texture_can_size (CGL_TEXTURE_2D,
CGL_RGBA,
CGL_UNSIGNED_BYTE,
clutter_util_next_p2(priv->width),
clutter_util_next_p2(priv->height)))
{
cogl_texture_image_2d (priv->target_type,
priv->pixel_format,
clutter_util_next_p2(priv->width),
clutter_util_next_p2(priv->height),
priv->pixel_format,
priv->pixel_type,
NULL);
}
else
return FALSE; /* FIXME: add tiling */
}
cogl_texture_sub_image_2d (priv->target_type,
0,
0,
priv->width,
priv->height,
priv->pixel_format,
priv->pixel_type,
data);
CLUTTER_ACTOR_SET_FLAGS (CLUTTER_ACTOR (texture), CLUTTER_ACTOR_REALIZED);
if (size_change)
{
g_signal_emit (texture, texture_signals[SIZE_CHANGE],
0, priv->width, priv->height);
if (priv->sync_actor_size)
clutter_actor_set_size (CLUTTER_ACTOR(texture),
priv->width,
priv->height);
}
g_signal_emit (texture, texture_signals[PIXBUF_CHANGE], 0);
if (CLUTTER_ACTOR_IS_MAPPED (CLUTTER_ACTOR(texture)))
clutter_actor_queue_redraw (CLUTTER_ACTOR(texture));
return TRUE;
}
/**
* clutter_texture_set_pixbuf:
* @texture: A #ClutterTexture
* @pixbuf: A #GdkPixbuf
*
* Sets a #ClutterTexture image data from a #GdkPixbuf
*
**/
gboolean
clutter_texture_set_pixbuf (ClutterTexture *texture,
GdkPixbuf *pixbuf,
GError **error)
{
ClutterTexturePrivate *priv;
priv = texture->priv;
g_return_val_if_fail (pixbuf != NULL, FALSE);
return clutter_texture_set_from_rgb_data (texture,
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_has_alpha (pixbuf),
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
4,
0,
error);
}
/**
* clutter_texture_new_from_pixbuf:
* @pixbuf: A #GdkPixbuf
*
* Creates a new #ClutterTexture object.
*
* Return value: A newly created #ClutterTexture object.
**/
ClutterActor*
clutter_texture_new_from_pixbuf (GdkPixbuf *pixbuf)
{
ClutterTexture *texture;
texture = g_object_new (CLUTTER_TYPE_TEXTURE, "pixbuf", pixbuf, NULL);
return CLUTTER_ACTOR(texture);
}
/**
* clutter_texture_new:
*
* Creates a new empty #ClutterTexture object.
*
* Return value: A newly created #ClutterTexture object.
**/
ClutterActor *
clutter_texture_new (void)
{
return g_object_new (CLUTTER_TYPE_TEXTURE, NULL);
}
/**
* clutter_texture_get_base_size:
* @texture: A #ClutterTexture
* @width: Pointer to gint to be populated with width value if non NULL.
* @height: Pointer to gint to be populated with height value if non NULL.
*
* Gets the size in pixels of the untransformed underlying texture pixbuf data.
*
**/
void /* FIXME: rename to get_image_size */
clutter_texture_get_base_size (ClutterTexture *texture,
gint *width,
gint *height)
{
/* Attempt to realize, mainly for subclasses ( such as labels )
* which maynot create pixbuf data and thus base size until
* realization happens.
*/
if (!CLUTTER_ACTOR_IS_REALIZED(CLUTTER_ACTOR(texture)))
clutter_actor_realize (CLUTTER_ACTOR(texture));
if (width)
*width = texture->priv->width;
if (height)
*height = texture->priv->height;
}
/**
* clutter_texture_bind_tile:
* @texture: A #ClutterTexture
* @index: Tile index to bind
*
* Proxys a call to glBindTexture a to bind an internal 'tile'.
*
* This function is only useful for sub class implementations
* and never should be called by an application.
**/
void
clutter_texture_bind_tile (ClutterTexture *texture, gint index)
{
ClutterTexturePrivate *priv;
priv = texture->priv;
cogl_texture_bind (priv->target_type, priv->tiles[index]);
}
/**
* clutter_texture_get_n_tiles:
* @texture: A #ClutterTexture
* @n_x_tiles: Location to store number of tiles in horizonally axis
* @n_y_tiles: Location to store number of tiles in vertical axis
*
* Retreives internal tile dimentioning.
*
* This function is only useful for sub class implementations
* and never should be called by an application.
**/
void
clutter_texture_get_n_tiles (ClutterTexture *texture,
gint *n_x_tiles,
gint *n_y_tiles)
{
if (n_x_tiles)
*n_x_tiles = texture->priv->n_x_tiles;
if (n_y_tiles)
*n_y_tiles = texture->priv->n_y_tiles;
}
/**
* clutter_texture_get_x_tile_detail:
* @texture: A #ClutterTexture
* @x_index: X index of tile to query
* @pos: Location to store tiles X position
* @size: Location to store tiles horizontal size in pixels
* @waste: Location to store tiles horizontal wastage in pixels
*
* Retreives details of a tile on x axis.
*
* This function is only useful for sub class implementations
* and never should be called by an application.
**/
void
clutter_texture_get_x_tile_detail (ClutterTexture *texture,
gint x_index,
gint *pos,
gint *size,
gint *waste)
{
g_return_if_fail(x_index < texture->priv->n_x_tiles);
if (pos)
*pos = texture->priv->x_tiles[x_index].pos;
if (size)
*size = texture->priv->x_tiles[x_index].size;
if (waste)
*waste = texture->priv->x_tiles[x_index].waste;
}
/**
* clutter_texture_get_y_tile_detail:
* @texture: A #ClutterTexture
* @y_index: Y index of tile to query
* @pos: Location to store tiles Y position
* @size: Location to store tiles vertical size in pixels
* @waste: Location to store tiles vertical wastage in pixels
*
* Retreives details of a tile on y axis.
*
* This function is only useful for sub class implementations
* and never should be called by an application.
**/
void
clutter_texture_get_y_tile_detail (ClutterTexture *texture,
gint y_index,
gint *pos,
gint *size,
gint *waste)
{
ClutterTexturePrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXTURE (texture));
priv = texture->priv;
g_return_if_fail (y_index < priv->n_y_tiles);
if (pos)
*pos = priv->y_tiles[y_index].pos;
if (size)
*size = priv->y_tiles[y_index].size;
if (waste)
*waste = priv->y_tiles[y_index].waste;
}
/**
* clutter_texture_has_generated_tiles:
* @texture: A #ClutterTexture
*
* Checks if #ClutterTexture has generated underlying GL texture tiles.
*
* This function is only useful for sub class implementations
* and never should be called by an application.
*
* Return value: TRUE if texture has pregenerated GL tiles.
**/
gboolean
clutter_texture_has_generated_tiles (ClutterTexture *texture)
{
g_return_val_if_fail (CLUTTER_IS_TEXTURE (texture), FALSE);
return (texture->priv->tiles != NULL);
}
/**
* clutter_texture_is_tiled:
* @texture: A #ClutterTexture
*
* Checks if #ClutterTexture is tiled.
*
* This function is only useful for sub class implementations
* and never should be called by an application.
*
* Return value: TRUE if texture is tiled
**/
gboolean
clutter_texture_is_tiled (ClutterTexture *texture)
{
g_return_val_if_fail (CLUTTER_IS_TEXTURE (texture), FALSE);
return texture->priv->is_tiled;
}
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