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mutter/clutter/clutter-texture.c
Chris Lord 9b780c2716 * clutter/clutter-entry.c: 
* clutter/clutter-group.c:
        * clutter/clutter-label.c:
        * clutter/clutter-rectangle.c:
        * clutter/clutter-texture.c:
        More documentation fixes
2008-02-15 17:11:50 +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()
* functions are used to copy image data into texture memory and subsequently
* realize the texture.
*
* If texture reads are supported by underlying GL implementation,
* 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.
*
* Note: a ClutterTexture will scale its contents to fit the bounding box
* requested using clutter_actor_request_coords() and its wrappers. To
* display an area of a texture without scaling, you should set the clip
* area using clutter_actor_set_clip().
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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;
#define CLUTTER_TEXTURE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_TEXTURE, ClutterTexturePrivate))
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;
COGLuint *tiles;
ClutterActor *fbo_source;
COGLuint fbo_handle;
};
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 void
texture_fbo_free_resources (ClutterTexture *texture);
GQuark
clutter_texture_error_quark (void)
{
return g_quark_from_static_string ("clutter-texture-error-quark");
}
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);
if (priv->y_tiles)
g_free (priv->y_tiles);
priv->n_y_tiles = tile_dimension (priv->height, y_pot,
priv->max_tile_waste, NULL);
if (priv->n_x_tiles == 1 && priv->n_y_tiles == 1)
{
/* So were not actually tiled... */
priv->n_x_tiles = priv->n_y_tiles = 0;
priv->is_tiled = FALSE;
return;
}
priv->x_tiles = g_new (ClutterTextureTileDimension, priv->n_x_tiles);
tile_dimension (priv->width, x_pot, priv->max_tile_waste, priv->x_tiles);
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 x_1,
int y_1,
int x_2,
int y_2)
{
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 = x_2 - x_1;
qheight = y_2 - y_1;
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 = x_1; qx2 = x_2;
qy1 = y_1; qy2 = y_2;
cogl_texture_quad (x_1, x_2, y_1, y_2,
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 = x_1 + lastx;
qx2 = qx1 + ((qwidth * actual_w ) / priv->width );
qy1 = y_1 + 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 inline
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 (COGLuint, 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);
if (create_textures)
{
gint tex_width, tex_height;
tex_width = priv->width;
tex_height = priv->height;
if (priv->target_type == CGL_TEXTURE_2D) /* POT */
{
tex_width = clutter_util_next_p2 (priv->width);
tex_height = clutter_util_next_p2 (priv->height);
}
cogl_texture_image_2d (priv->target_type,
CGL_RGBA,
tex_width,
tex_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 (COGLuint, 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_gid (CLUTTER_ACTOR (texture)),
x, y);
printf ("saving %s\n", filename);
gdk_pixbuf_save (pixtmp, filename , "png", NULL, NULL);
g_free (filename);
}
#endif
cogl_texture_bind (priv->target_type, priv->tiles[i]);
cogl_texture_set_alignment (priv->target_type,
4, priv->x_tiles[x].size);
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;
/* there's no need to read the pixels back when unrealizing inside
* a dispose run, and the dispose() call will release the GL
* texture data as well, so we can safely bail out now
*/
if (CLUTTER_PRIVATE_FLAGS (actor) & CLUTTER_ACTOR_IN_DESTRUCTION)
return;
CLUTTER_MARK();
if (priv->fbo_source)
{
/* Free up our fbo handle and texture resources, realize will recreate */
cogl_offscreen_destroy (priv->fbo_handle);
priv->fbo_handle = 0;
texture_free_gl_resources (texture);
return;
}
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->fbo_source)
{
/* Handle FBO's */
priv->tiles = g_new (COGLuint, 1);
/* FIXME: needs a cogl wrapper */
glGenTextures (1, priv->tiles);
cogl_texture_bind (priv->target_type, priv->tiles[0]);
cogl_texture_image_2d (priv->target_type,
CGL_RGBA,
priv->width,
priv->height,
priv->pixel_format,
priv->pixel_type,
NULL);
priv->fbo_handle = cogl_offscreen_create (priv->tiles[0]);
if (priv->fbo_handle == 0)
{
g_warning ("%s: Offscreen texture creation failed", G_STRLOC);
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
return;
}
clutter_actor_set_size (actor, priv->width, priv->height);
return;
}
if (priv->local_pixbuf != NULL)
{
/* Move any local image data we have from unrealization
* back into video memory.
*/
if (priv->is_tiled)
texture_init_tiles (texture);
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);
ClutterTexturePrivate *priv = texture->priv;
gint x_1, y_1, x_2, y_2;
ClutterColor col = { 0xff, 0xff, 0xff, 0xff };
if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR(texture)))
clutter_actor_realize (CLUTTER_ACTOR(texture));
if (priv->tiles == NULL)
{
/* We just need do debug this state, it doesn't really need to
* throw a an error as what previously happened. Sub classes
* quite likely may not be able to realize.
*/
CLUTTER_NOTE (PAINT, "unable to paint texture '%s', contains no tiles",
clutter_actor_get_name (self)
? clutter_actor_get_name (self)
: "unknown");
return;
}
if (priv->fbo_handle)
{
ClutterMainContext *context;
ClutterShader *shader = NULL;
context = clutter_context_get_default ();
if (context->shaders)
shader = clutter_actor_get_shader (context->shaders->data);
/* Temporarily turn of the shader on the top of the context's
* shader stack, to restore the GL pipeline to it's natural state.
*/
if (shader)
clutter_shader_set_is_enabled (shader, FALSE);
cogl_offscreen_redirect_start (priv->fbo_handle,
priv->width, priv->height);
/* Render out actor scene to fbo */
clutter_actor_paint (priv->fbo_source);
cogl_offscreen_redirect_end (priv->fbo_handle,
CLUTTER_STAGE_WIDTH(),
CLUTTER_STAGE_HEIGHT());
/* If there is a shader on top of the shader stack, turn it back on. */
if (shader)
clutter_shader_set_is_enabled (shader, TRUE);
glBindTexture(CGL_TEXTURE_RECTANGLE_ARB, priv->tiles[0]);
}
CLUTTER_NOTE (PAINT,
"painting texture '%s'",
clutter_actor_get_name (self) ? clutter_actor_get_name (self)
: "unknown");
cogl_push_matrix ();
switch (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, &x_1, &y_1, &x_2, &y_2);
CLUTTER_NOTE (PAINT, "paint to x1: %i, y1: %i x2: %i, y2: %i "
"opacity: %i",
x_1, y_1, x_2, y_2,
clutter_actor_get_opacity (self));
/* Paint will of translated us */
texture_render_to_gl_quad (texture, 0, 0, x_2 - x_1, y_2 - y_1);
cogl_pop_matrix ();
}
static void
clutter_texture_request_coords (ClutterActor *self,
ClutterActorBox *box)
{
ClutterTexture *texture = CLUTTER_TEXTURE (self);
ClutterActorBox old_request;
clutter_actor_query_coords (self, &old_request);
if (((box->x2 - box->x1) != (old_request.x2 - old_request.x1)) ||
((box->y2 - box->y1) != (old_request.y2 - old_request.y1)))
texture->priv->sync_actor_size = FALSE;
CLUTTER_ACTOR_CLASS (clutter_texture_parent_class)->request_coords (self, box);
}
static void
clutter_texture_dispose (GObject *object)
{
ClutterTexture *texture = CLUTTER_TEXTURE (object);
ClutterTexturePrivate *priv;
priv = texture->priv;
texture_free_gl_resources (texture);
texture_fbo_free_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_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:
if (g_value_get_object (value))
clutter_texture_set_pixbuf (texture,
GDK_PIXBUF (g_value_get_object (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_take_object (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;
g_type_class_add_private (klass, sizeof (ClutterTexturePrivate));
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;
actor_class->request_coords = clutter_texture_request_coords;
gobject_class->dispose = clutter_texture_dispose;
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_object ("pixbuf",
"Pixbuf source for Texture.",
"Pixbuf source for Texture.",
GDK_TYPE_PIXBUF,
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 "
"dimensions",
TRUE,
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 ignored",
FALSE,
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 ignored",
FALSE,
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,
CLUTTER_PARAM_READWRITE));
g_object_class_install_property
(gobject_class, PROP_MAX_TILE_WASTE,
g_param_spec_int ("tile-waste",
"Tile dimension to waste",
"Max wastage dimension 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;
self->priv = priv = CLUTTER_TEXTURE_GET_PRIVATE (self);
priv->max_tile_waste = 64;
priv->filter_quality = 1;
priv->is_tiled = TRUE;
priv->pixel_type = PIXEL_TYPE;
priv->pixel_format = CGL_RGBA;
priv->repeat_x = FALSE;
priv->repeat_y = FALSE;
priv->sync_actor_size = TRUE;
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;
}
static void
pixbuf_destroy_notify (guchar *pixels, gpointer data)
{
g_free (pixels);
}
static GdkPixbuf *
texture_get_tile_pixbuf (ClutterTexture *texture,
COGLuint texture_id,
gint bpp,
gint ix,
gint iy)
{
#ifdef HAVE_COGL_GL
ClutterTexturePrivate *priv;
guchar *pixels = NULL;
guint tex_width, tex_height;
priv = texture->priv;
cogl_texture_bind (priv->target_type, texture_id);
if (!priv->is_tiled)
{
tex_width = priv->width;
tex_height = priv->height;
}
else
{
tex_width = priv->x_tiles[ix].size;
tex_height = priv->y_tiles[iy].size;
}
/* Make sure if we aren't using rectangular textures that we increase the
* texture size accordingly.
*/
if (priv->target_type == CGL_TEXTURE_2D) /* POT */
{
tex_width = clutter_util_next_p2 (tex_width);
tex_height = clutter_util_next_p2 (tex_height);
}
cogl_texture_set_alignment (priv->target_type, 4, tex_width);
if ((pixels = g_malloc (((tex_width * bpp + 3) &~ 3) * tex_height)) == NULL)
return NULL;
/* Read data from GL texture 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);
return gdk_pixbuf_new_from_data ((const guchar *)pixels,
GDK_COLORSPACE_RGB,
(priv->pixel_format == CGL_RGBA
|| priv->pixel_format == CGL_BGRA),
8,
tex_width,
tex_height,
((tex_width * bpp + 3) &~ 3),
pixbuf_destroy_notify,
NULL);
#else
return NULL;
#endif
}
/**
* 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.
*
* Note: %NULL is always returned with OpenGL ES.
*
* Return value: A #GdkPixbuf, or %NULL on fail.
**/
GdkPixbuf *
clutter_texture_get_pixbuf (ClutterTexture *texture)
{
#if HAVE_COGL_GL
ClutterTexturePrivate *priv;
GdkPixbuf *pixbuf;
GdkPixbuf *pixtmp;
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;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
priv->pixel_format == CGL_RGBA ||
priv->pixel_format == CGL_BGRA,
8, priv->width, priv->height);
if (pixbuf == NULL)
return NULL;
if (!priv->is_tiled)
{
pixtmp = texture_get_tile_pixbuf (texture, priv->tiles[0], bpp, 0, 0);
if (pixtmp == NULL)
{
g_object_unref (pixbuf);
return NULL;
}
/* Avoid a copy if the texture has the same size as the pixbuf */
if ((gdk_pixbuf_get_width (pixtmp) == priv->width &&
gdk_pixbuf_get_height (pixtmp) == priv->height))
{
g_object_unref (pixbuf);
pixbuf = pixtmp;
}
else
{
gdk_pixbuf_copy_area (pixtmp,
0, 0,
priv->width, priv->height,
pixbuf,
0, 0);
g_object_unref (pixtmp);
}
}
else
{
int x,y,i;
i = 0;
for (x = 0; x < priv->n_x_tiles; x++)
for (y = 0; y < priv->n_y_tiles; y++)
{
gint src_w, src_h;
pixtmp = texture_get_tile_pixbuf (texture, priv->tiles[i], bpp, x, y);
if (pixtmp == NULL)
{
g_object_unref (pixbuf);
return NULL;
}
src_w = priv->x_tiles[x].size;
src_h = priv->y_tiles[y].size;
/* 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 (pixtmp,
0, 0, src_w, src_h,
pixbuf,
priv->x_tiles[x].pos, priv->y_tiles[y].pos);
g_object_unref (pixtmp);
i++;
}
}
return pixbuf;
#else
/* FIXME: func call wont work for GLES...
* features need to reflect this.
*/
return NULL;
#endif
}
/* internal helper function for initialization of
* clutter_texture_set_from_rgb_data and clutter_texture_set_area_from_rgb_data.
*/
static inline gboolean
texture_prepare_upload (gboolean initialize,
ClutterTexture *texture,
const guchar *data,
gboolean has_alpha,
gint width,
gint height,
gint rowstride,
gint bpp,
ClutterTextureFlags flags,
guchar **copy_data,
gboolean *texture_dirty,
gboolean *size_change)
{
ClutterTexturePrivate *priv;
COGLenum prev_format;
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);
if (initialize)
{
*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 (initialize)
{
if (prev_format != priv->pixel_format || priv->pixel_type != PIXEL_TYPE)
*texture_dirty = TRUE;
}
else
{
if (prev_format != priv->pixel_format || priv->pixel_type != PIXEL_TYPE)
{
g_warning ("%s: pixel format or type mismatch", G_STRFUNC);
return FALSE;
}
}
priv->pixel_type = PIXEL_TYPE;
return TRUE;
}
/**
* clutter_texture_set_from_rgb_data:
* @texture: A #ClutterTexture
* @data: Image data in RGBA type colorspace.
* @has_alpha: Set to TRUE if image data has an 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: return location for a #GError, or %NULL.
*
* Sets #ClutterTexture image data.
*
* Note: This function is likely to change in future versions.
*
* Return value: %TRUE on success, %FALSE on failure.
*
* Since: 0.4.
**/
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;
guchar *copy_data = NULL;
gboolean texture_dirty = TRUE, size_change = FALSE;
priv = texture->priv;
/* Remove FBO if exisiting */
if (priv->fbo_source)
texture_fbo_free_resources (texture);
if (!texture_prepare_upload (TRUE, texture, data, has_alpha,
width, height, rowstride, bpp, flags,
&copy_data, &texture_dirty, &size_change))
{
return FALSE;
}
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 YUV type colorspace.
* @width: Width in pixels of image data.
* @height: Height in pixels of image data
* @flags: #ClutterTextureFlags
* @error: Return location for a #GError, or %NULL.
*
* Sets a #ClutterTexture from YUV image data. If an error occurred,
* %FALSE is returned and @error is set.
*
* This function is likely to change in future versions.
*
* Return value: %TRUE if the texture was successfully updated
*
* Since 0.4.
**/
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;
g_return_val_if_fail (CLUTTER_IS_TEXTURE (texture), FALSE);
if (!clutter_feature_available (CLUTTER_FEATURE_TEXTURE_YUV))
{
g_set_error (error, CLUTTER_TEXTURE_ERROR,
CLUTTER_TEXTURE_ERROR_NO_YUV,
"YUV textures are not supported");
return FALSE;
}
priv = texture->priv;
if (priv->fbo_source)
texture_fbo_free_resources (texture);
/* 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 (COGLuint, 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)
{
gint new_width, new_height;
new_width = clutter_util_next_p2 (priv->width);
new_height = clutter_util_next_p2 (priv->height);
/* FIXME: need to check size limits correctly - does not
* seem to work if correct format and type are used so
* this is really a guess...
*/
if (cogl_texture_can_size (CGL_TEXTURE_2D,
CGL_RGBA,
CGL_UNSIGNED_BYTE,
new_width, new_height))
{
cogl_texture_image_2d (priv->target_type,
priv->pixel_format,
new_width, new_height,
priv->pixel_format,
priv->pixel_type,
NULL);
}
else
{
g_set_error (error, CLUTTER_TEXTURE_ERROR,
CLUTTER_TEXTURE_ERROR_OUT_OF_MEMORY,
"Unable to allocate a texture of %d by %d pixels",
new_width,
new_height);
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
* @error: Return location for a #GError, or %NULL
*
* Sets a #ClutterTexture image data from a #GdkPixbuf. In case of
* failure, %FALSE is returned and @error is set.
*
* Return value: %TRUE if the pixbuf was successfully set
*
* Since: 0.4
*/
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
*
* Proxies a call to glBindTexture to bind an internal 'tile'.
*
* This function is only useful for #ClutterTexture sub-classes
* and should never be called by an application.
**/
void
clutter_texture_bind_tile (ClutterTexture *texture,
gint index_)
{
ClutterTexturePrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXTURE (texture));
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 dimensioning.
*
* This function is only useful for #ClutterTexture sub-classes
* and should never 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 tile's X position
* @size: Location to store tile's horizontal size in pixels
* @waste: Location to store tile's horizontal wastage in pixels
*
* Retreives details of a tile on the X axis.
*
* This function is only useful for #ClutterTexture sub-classes
* and should never 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 tile's Y position
* @size: Location to store tile's vertical size in pixels
* @waste: Location to store tile's vertical wastage in pixels
*
* Retreives details of a tile on the Y axis.
*
* This function is only useful for #ClutterTexture sub-classes
* and should never 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 #ClutterTexture sub-classes
* and should never be called by an application.
*
* Return value: %TRUE if texture has pre-generated 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 #ClutterTexture sub-classes
* and should never 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;
}
static void inline
texture_update_data (ClutterTexture *texture,
const guchar *data,
gboolean has_alpha,
gint x_0,
gint y_0,
gint width,
gint height,
gint rowstride,
gint bpp)
{
ClutterTexturePrivate *priv;
gint x, y;
gint i = 0;
gboolean create_textures = FALSE;
priv = texture->priv;
g_return_if_fail (data != NULL);
CLUTTER_MARK();
if (!priv->is_tiled)
{
g_assert (priv->tiles);
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;
cogl_texture_sub_image_2d (priv->target_type,
x_0,
y_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);
if (priv->tiles == NULL)
{
g_assert (0);
priv->tiles = g_new (COGLuint, 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++)
{
gint master_offset_x;
gint effective_x;
gint effective_width;
gint master_offset_y;
gint effective_y;
gint effective_height;
/*
* -- first tile --
* |--------------------- priv->width ------------------------------|
* | <- priv->x_tiles[x].pos
* |-----------| <- priv->x_tiles[x].size
* |-------| <- x_0
* |------------| <- width
* |--------------------| <- x_0 + width
* |-------| <- master_offset = -8
* |-------| <- effective_x = 8
* |---| <- effective_width
*
* -- second tile ---
*
* |--------------------- priv->width ------------------------------|
* |-----------| <- priv->x_tiles[x].pos
* |-----------| <- priv->x_tiles[x].size (src_w)
* |-------| <- x_0
* |------------| <- width
* |--------------------| <- x_0 + width
* |---| <- master_offset = 4
* | <- effective_x (0 in between)
* |--------| <- effective_width
*
* XXXXXXXXXXXXXX <- master
* |___________|___________|___________|___________|___________|_____%%%%%%|
*/
gint src_w, src_h;
src_w = priv->x_tiles[x].size;
src_h = priv->y_tiles[y].size;
/* skip tiles that do not intersect the updated region */
if ((priv->x_tiles[x].pos + src_w < x_0 ||
priv->y_tiles[y].pos + src_h < y_0 ||
priv->x_tiles[x].pos >= x_0 + width ||
priv->y_tiles[y].pos >= y_0 + height))
{
i++;
continue;
}
master_offset_x = priv->x_tiles[x].pos - x_0;
if (priv->x_tiles[x].pos > x_0)
effective_x = 0;
else
effective_x = x_0 - priv->x_tiles[x].pos;
effective_width = (x_0 + width) - priv->x_tiles[x].pos;
if (effective_width > src_w - effective_x)
effective_width = src_w - effective_x;
master_offset_y = priv->y_tiles[y].pos - y_0;
if (priv->y_tiles[y].pos > y_0)
effective_y = 0;
else
effective_y = y_0 - priv->y_tiles[y].pos;
effective_height = (y_0 + height) - priv->y_tiles[y].pos;
if (effective_height > src_h - effective_y)
effective_height = src_h - effective_y;
if (master_offset_x < 0)
master_offset_x = 0;
if (master_offset_y < 0)
master_offset_y = 0;
if (master_offset_x + effective_width > width)
effective_width = width - master_offset_x;
if (master_offset_y + effective_height > height)
effective_height = height - master_offset_y;
cogl_texture_bind (priv->target_type, priv->tiles[i]);
cogl_texture_set_alignment (priv->target_type, 4, rowstride/4);
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);
cogl_texture_sub_image_2d (priv->target_type,
effective_x,
effective_y,
effective_width,
effective_height,
priv->pixel_format,
priv->pixel_type,
data + (master_offset_y * priv->width + master_offset_x) * 4);
i++;
}
}
/**
* clutter_texture_set_area_from_rgb_data:
* @texture: A #ClutterTexture
* @data: Image data in RGB type colorspace.
* @has_alpha: Set to TRUE if image data has an alpha channel.
* @x: X coordinate of upper left corner of region to update.
* @y: Y coordinate of upper left corner of region to update.
* @width: Width in pixels of region to update.
* @height: Height in pixels of region to update.
* @rowstride: Distance in bytes between row starts on source buffer.
* @bpp: bytes per pixel ( Currently only 4 supported )
* @flags: #ClutterTextureFlags
* @error: return location for a #GError, or %NULL
*
* Updates a sub-region of the pixel data in a #ClutterTexture.
*
* Return value: %TRUE on success, %FALSE on failure.
*
* Since 0.6.
*/
gboolean
clutter_texture_set_area_from_rgb_data (ClutterTexture *texture,
const guchar *data,
gboolean has_alpha,
gint x,
gint y,
gint width,
gint height,
gint rowstride,
gint bpp,
ClutterTextureFlags flags,
GError **error)
{
ClutterTexturePrivate *priv;
guchar *copy_data = NULL;
priv = texture->priv;
if (!texture_prepare_upload (FALSE, texture, data, has_alpha,
width, height, rowstride,
bpp, flags, &copy_data, NULL, NULL))
{
return FALSE;
}
texture_update_data (texture,
copy_data != NULL ? copy_data : data,
has_alpha,
x, y,
width, height,
rowstride,
bpp);
CLUTTER_ACTOR_SET_FLAGS (CLUTTER_ACTOR (texture), CLUTTER_ACTOR_REALIZED);
/* rename signal */
g_signal_emit (texture, texture_signals[PIXBUF_CHANGE], 0);
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;
}
static void
on_fbo_source_size_change (GObject *object,
GParamSpec *param_spec,
ClutterTexture *texture)
{
ClutterTexturePrivate *priv = texture->priv;
guint w, h;
clutter_actor_get_abs_size (priv->fbo_source, &w, &h);
if (w != priv->width || h != priv->height)
{
if (!cogl_texture_can_size (CGL_TEXTURE_RECTANGLE_ARB,
CGL_RGBA, PIXEL_TYPE, w, h))
{
g_warning ("%s: Offscreen source too large for texture", G_STRLOC);
return;
}
/* tear down the FBO */
cogl_offscreen_destroy (priv->fbo_handle);
texture_free_gl_resources (texture);
priv->width = w;
priv->height = h;
priv->tiles = g_new (COGLuint, 1);
/* FIXME: needs a cogl wrapper */
glGenTextures (1, priv->tiles);
cogl_texture_bind (priv->target_type, priv->tiles[0]);
cogl_texture_image_2d (priv->target_type,
CGL_RGBA,
w,
h,
priv->pixel_format,
priv->pixel_type,
NULL);
priv->fbo_handle = cogl_offscreen_create (priv->tiles[0]);
clutter_actor_set_size (CLUTTER_ACTOR(texture), w, h);
}
}
static void
on_fbo_parent_change (ClutterActor *actor,
ClutterActor *old_parent,
ClutterTexture *texture)
{
ClutterActor *parent = CLUTTER_ACTOR(texture);
while ((parent = clutter_actor_get_parent (parent)) != NULL)
if (parent == actor)
{
g_warning ("Offscreen texture is ancestor of source!");
/* Desperate but will avoid infinite loops */
clutter_actor_unparent (actor);
}
}
/**
* clutter_texture_new_from_actor:
* @actor: A source #ClutterActor
*
* Creates a new #ClutterTexture object with its source a prexisting
* actor (and associated children). The textures content will contain
* 'live' redirected output of the actors scene.
*
* Note this function is intented as a utility call for uniformly applying
* shaders to groups and other potential visual effects. It requires that
* both %CLUTTER_FEATURE_TEXTURE_RECTANGLE and %CLUTTER_FEATURE_OFFSCREEN
* features are supported by the current backend and the target system.
*
* Some tips on usage:
*
* <itemizedlist>
* <listitem>
* <para>The source actor must be made visible (i.e by calling
* #clutter_actor_show). The source actor does not however have to
* have a parent.</para>
* </listitem>
* <listitem>
* <para>Avoid reparenting the source with the created texture.</para>
* </listitem>
* <listitem>
* <para>A group can be padded with a transparent rectangle as to
* provide a border to contents for shader output (blurring text
* for example).</para>
* </listitem>
* <listitem>
* <para>The texture will automatically resize to contain a further
* transformed source. However, this involves overhead and can be
* avoided by placing the source actor in a bounding group
* sized large enough to contain any child tranformations.</para>
* </listitem>
* <listitem>
* <para>Uploading pixel data to the texture (e.g by
* #clutter_actor_set_pixbuf) will destroy the offscreen texture data
* and end redirection.</para>
* </listitem>
* <listitem>
* <para>#clutter_texture_get_pixbuf can be used to read the offscreen
* texture pixels into a pixbuf.</para>
* </listitem>
* </itemizedlist>
*
* Return value: A newly created #ClutterTexture object, or %NULL on failure.
*
* Since: 0.6
*/
ClutterActor *
clutter_texture_new_from_actor (ClutterActor *actor)
{
ClutterTexture *texture;
ClutterTexturePrivate *priv;
guint w, h;
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
/* FIXME: Some error result on below could be useful */
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE) == FALSE)
return NULL;
if (clutter_feature_available (CLUTTER_FEATURE_OFFSCREEN) == FALSE)
return NULL;
if (!CLUTTER_ACTOR_IS_REALIZED (actor))
{
clutter_actor_realize (actor);
if (!CLUTTER_ACTOR_IS_REALIZED (actor))
return NULL;
}
clutter_actor_get_abs_size (actor, &w, &h);
if (w == 0 || h == 0)
return NULL;
if (!cogl_texture_can_size (CGL_TEXTURE_RECTANGLE_ARB,
CGL_RGBA, PIXEL_TYPE, w, h))
return NULL;
/* Hopefully now were good.. */
texture = g_object_new (CLUTTER_TYPE_TEXTURE, NULL);
priv = texture->priv;
priv->fbo_source = g_object_ref(actor);
/* Connect up any signals which could change our underlying size */
g_signal_connect (actor,
"notify::width",
G_CALLBACK(on_fbo_source_size_change),
texture);
g_signal_connect (actor,
"notify::height",
G_CALLBACK(on_fbo_source_size_change),
texture);
g_signal_connect (actor,
"notify::scale-x",
G_CALLBACK(on_fbo_source_size_change),
texture);
g_signal_connect (actor,
"notify::scale-y",
G_CALLBACK(on_fbo_source_size_change),
texture);
g_signal_connect (actor,
"notify::rotation-angle-x",
G_CALLBACK(on_fbo_source_size_change),
texture);
g_signal_connect (actor,
"notify::rotation-angle-y",
G_CALLBACK(on_fbo_source_size_change),
texture);
g_signal_connect (actor,
"notify::rotation-angle-z",
G_CALLBACK(on_fbo_source_size_change),
texture);
/* And a warning if the source becomes a child of the texture */
g_signal_connect (actor,
"parent-set",
G_CALLBACK(on_fbo_parent_change),
texture);
priv->width = w;
priv->height = h;
priv->target_type = CGL_TEXTURE_RECTANGLE_ARB;
priv->pixel_format = CGL_RGBA;
priv->pixel_type = PIXEL_TYPE;
priv->is_tiled = 0;
clutter_actor_set_size (CLUTTER_ACTOR(texture), priv->width, priv->height);
return CLUTTER_ACTOR(texture);
}
static void
texture_fbo_free_resources (ClutterTexture *texture)
{
ClutterTexturePrivate *priv;
priv = texture->priv;
CLUTTER_MARK();
if (priv->fbo_source != NULL)
{
g_signal_handlers_disconnect_by_func
(priv->fbo_source,
G_CALLBACK(on_fbo_parent_change),
texture);
g_signal_handlers_disconnect_by_func
(priv->fbo_source,
G_CALLBACK(on_fbo_source_size_change),
texture);
g_object_unref (priv->fbo_source);
priv->fbo_source = NULL;
}
if (priv->fbo_handle != 0)
{
cogl_offscreen_destroy (priv->fbo_handle);
priv->fbo_handle = 0;
}
}
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