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mutter/clutter/glx/clutter-glx-texture-pixmap.c
Matthew Allum c2cb5bf64a 2008-04-15 Matthew Allum <mallum@openedhand.com> 
Work related to #873;

        * clutter/glx/clutter-backend-glx.c:
        * clutter/glx/clutter-backend-glx.h:
        * clutter/x11/clutter-x11-texture-pixmap.c:
        * clutter/x11/clutter-x11-texture-pixmap.h:
        General cleanup of texture pixmap code, adding;
          - Pixmap dimentions and depth now auto probed, read only props.
          - More X safety traps
          - Add support for optionally tracking damage and automatically
            updating texture.

        * clutter/glx/clutter-glx-texture-pixmap.c:
        * clutter/glx/clutter-glx-texture-pixmap.h:
        General cleanup and some safety additions. Needs more work so
        'proper' subclass - dependent on new COGL.

        * clutter/x11/clutter-backend-x11.c: (clutter_x11_remove_filter):
        Invert g_return_if check.

        * configure.ac:
        Pull in XComposite and XDamage (at least for now)

        * tests/Makefile.am:
        * tests/test-pixmap.c:
        Add a modified test from Johan for above.
2008-04-15 21:18:13 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Johan Bilien <johan.bilien@nokia.com>
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-glx-texture-pixmap
* @short_description: A texture which displays the content of an X Pixmap.
*
* #ClutterGLXTexturePixmap is a class for displaying the content of an
* X Pixmap as a ClutterActor. Used together with the X Composite extension,
* it allows to display the content of X Windows inside Clutter.
*
* The class requires the GLX_EXT_texture_from_pixmap OpenGL extension
* (http://people.freedesktop.org/~davidr/GLX_EXT_texture_from_pixmap.txt)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../x11/clutter-x11-texture-pixmap.h"
#include "clutter-glx-texture-pixmap.h"
#include "clutter-glx.h"
#include "clutter-backend-glx.h"
#include "../clutter-util.h"
#include "cogl.h"
typedef void (*BindTexImage) (Display *display,
GLXDrawable drawable,
int buffer,
int *attribList);
typedef void (*ReleaseTexImage) (Display *display,
GLXDrawable drawable,
int buffer);
static BindTexImage _gl_bind_tex_image = NULL;
static ReleaseTexImage _gl_release_tex_image = NULL;
static gboolean _have_tex_from_pixmap_ext = FALSE;
static gboolean _ext_check_done = FALSE;
struct _ClutterGLXTexturePixmapPrivate
{
COGLenum target_type;
guint texture_id;
GLXPixmap glx_pixmap;
gboolean bound;
};
static void
clutter_glx_texture_pixmap_class_init (ClutterGLXTexturePixmapClass *klass);
static void
clutter_glx_texture_pixmap_init (ClutterGLXTexturePixmap *self);
static void
clutter_glx_texture_pixmap_dispose (GObject *object);
static void
clutter_glx_texture_pixmap_notify (GObject *object,
GParamSpec *pspec);
static void
clutter_glx_texture_pixmap_realize (ClutterActor *actor);
static void
clutter_glx_texture_pixmap_unrealize (ClutterActor *actor);
static void
clutter_glx_texture_pixmap_paint (ClutterActor *actor);
static void
clutter_glx_texture_pixmap_update_area (ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height);
static void
clutter_glx_texture_pixmap_create_glx_pixmap (ClutterGLXTexturePixmap *tex);
G_DEFINE_TYPE (ClutterGLXTexturePixmap, \
clutter_glx_texture_pixmap, \
CLUTTER_X11_TYPE_TEXTURE_PIXMAP);
static void
clutter_glx_texture_pixmap_class_init (ClutterGLXTexturePixmapClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
ClutterX11TexturePixmapClass *x11_texture_class =
CLUTTER_X11_TEXTURE_PIXMAP_CLASS (klass);
g_type_class_add_private (klass, sizeof (ClutterGLXTexturePixmapPrivate));
object_class->dispose = clutter_glx_texture_pixmap_dispose;
object_class->notify = clutter_glx_texture_pixmap_notify;
actor_class->realize = clutter_glx_texture_pixmap_realize;
actor_class->unrealize = clutter_glx_texture_pixmap_unrealize;
actor_class->paint = clutter_glx_texture_pixmap_paint;
x11_texture_class->update_area = clutter_glx_texture_pixmap_update_area;
if (_ext_check_done == FALSE)
{
const gchar *glx_extensions = NULL;
glx_extensions =
glXQueryExtensionsString (clutter_x11_get_default_display (),
clutter_x11_get_default_screen ());
/* Check for the texture from pixmap extension */
if (cogl_check_extension ("GLX_EXT_texture_from_pixmap", glx_extensions))
{
_gl_bind_tex_image =
(BindTexImage)cogl_get_proc_address ("glXBindTexImageEXT");
_gl_release_tex_image =
(ReleaseTexImage)cogl_get_proc_address ("glXReleaseTexImageEXT");
if (_gl_bind_tex_image && _gl_release_tex_image)
_have_tex_from_pixmap_ext = TRUE;
}
_ext_check_done = TRUE;
}
}
static void
clutter_glx_texture_pixmap_init (ClutterGLXTexturePixmap *self)
{
ClutterGLXTexturePixmapPrivate *priv;
priv = self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self,
CLUTTER_GLX_TYPE_TEXTURE_PIXMAP,
ClutterGLXTexturePixmapPrivate);
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
priv->target_type = CGL_TEXTURE_RECTANGLE_ARB;
else
priv->target_type = CGL_TEXTURE_2D;
}
static void
clutter_glx_texture_pixmap_dispose (GObject *object)
{
ClutterGLXTexturePixmapPrivate *priv;
priv = CLUTTER_GLX_TEXTURE_PIXMAP (object)->priv;
if (priv->glx_pixmap != None)
{
clutter_x11_trap_x_errors ();
glXDestroyGLXPixmap (clutter_x11_get_default_display(),
priv->glx_pixmap);
XSync (clutter_x11_get_default_display(), FALSE);
clutter_x11_untrap_x_errors ();
priv->glx_pixmap = None;
}
G_OBJECT_CLASS (clutter_glx_texture_pixmap_parent_class)->dispose (object);
}
static void
clutter_glx_texture_pixmap_notify (GObject *object, GParamSpec *pspec)
{
if (g_str_equal (pspec->name, "pixmap"))
{
ClutterGLXTexturePixmap *texture = CLUTTER_GLX_TEXTURE_PIXMAP (object);
clutter_glx_texture_pixmap_create_glx_pixmap (texture);
}
}
static void
clutter_glx_texture_pixmap_realize (ClutterActor *actor)
{
ClutterGLXTexturePixmapPrivate *priv;
COGLenum pixel_type, pixel_format,filter_quality;
gboolean repeat_x, repeat_y;
guint width, height;
priv = CLUTTER_GLX_TEXTURE_PIXMAP (actor)->priv;
if (!_have_tex_from_pixmap_ext)
{
CLUTTER_ACTOR_CLASS (clutter_glx_texture_pixmap_parent_class)->
realize (actor);
return;
}
g_object_get (actor,
"pixel-type", &pixel_type,
"pixel-format", &pixel_format,
"repeat-x", &repeat_x,
"repeat-y", &repeat_y,
"filter-quality", &filter_quality,
"pixmap-width", &width,
"pixmap-height", &height,
NULL);
cogl_textures_create (1, &priv->texture_id);
clutter_glx_texture_pixmap_update_area (CLUTTER_X11_TEXTURE_PIXMAP (actor),
0, 0,
width, height);
cogl_texture_set_alignment (priv->target_type, 4, width);
cogl_texture_set_filters (priv->target_type,
filter_quality ? CGL_LINEAR : CGL_NEAREST,
filter_quality ? CGL_LINEAR : CGL_NEAREST);
cogl_texture_set_wrap (priv->target_type,
repeat_x ? CGL_REPEAT : CGL_CLAMP_TO_EDGE,
repeat_y ? CGL_REPEAT : CGL_CLAMP_TO_EDGE);
CLUTTER_ACTOR_SET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
}
static void
clutter_glx_texture_pixmap_unrealize (ClutterActor *actor)
{
ClutterGLXTexturePixmapPrivate *priv;
Display *dpy;
priv = CLUTTER_GLX_TEXTURE_PIXMAP (actor)->priv;
dpy = clutter_x11_get_default_display();
if (!_have_tex_from_pixmap_ext)
{
CLUTTER_ACTOR_CLASS (clutter_glx_texture_pixmap_parent_class)->
unrealize (actor);
return;
}
if (!CLUTTER_ACTOR_IS_REALIZED (actor))
return;
if (priv->bound && priv->glx_pixmap)
{
clutter_x11_trap_x_errors ();
(_gl_release_tex_image) (dpy,
priv->glx_pixmap,
GLX_FRONT_LEFT_EXT);
XSync (clutter_x11_get_default_display(), FALSE);
clutter_x11_untrap_x_errors ();
}
cogl_textures_destroy (1, &priv->texture_id);
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REALIZED);
}
static void
texture_render_to_gl_quad (ClutterGLXTexturePixmap *texture,
int x_1,
int y_1,
int x_2,
int y_2)
{
ClutterGLXTexturePixmapPrivate *priv = texture->priv;
int qx1 = 0, qx2 = 0, qy1 = 0, qy2 = 0;
int qwidth = 0, qheight = 0;
float tx, ty;
guint width, height;
g_object_get (texture,
"pixmap-width", &width,
"pixmap-height", &height,
NULL);
qwidth = x_2 - x_1;
qheight = y_2 - y_1;
cogl_texture_bind (priv->target_type, priv->texture_id);
if (priv->target_type == CGL_TEXTURE_2D) /* POT */
{
tx = (float) width / clutter_util_next_p2 (width);
ty = (float) height / clutter_util_next_p2 (height);
}
else
{
tx = (float) width;
ty = (float) 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));
}
static void
clutter_glx_texture_pixmap_paint (ClutterActor *actor)
{
ClutterGLXTexturePixmap *texture = CLUTTER_GLX_TEXTURE_PIXMAP (actor);
ClutterGLXTexturePixmapPrivate *priv = texture->priv;
gint x_1, y_1, x_2, y_2;
ClutterColor col = { 0xff, 0xff, 0xff, 0xff };
if (!_have_tex_from_pixmap_ext)
{
CLUTTER_ACTOR_CLASS (clutter_glx_texture_pixmap_parent_class)->
paint (actor);
return;
}
if (!CLUTTER_ACTOR_IS_REALIZED (actor))
clutter_actor_realize (actor);
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 (actor);
cogl_color (&col);
clutter_actor_get_coords (actor, &x_1, &y_1, &x_2, &y_2);
texture_render_to_gl_quad (texture, 0, 0, x_2 - x_1, y_2 - y_1);
cogl_pop_matrix ();
}
static GLXFBConfig *
get_fbconfig_for_depth (guint depth)
{
GLXFBConfig *fbconfigs, *ret = NULL;
int n_elements, i, found;
Display *dpy;
int db, stencil, alpha, mipmap, rgba, value;
dpy = clutter_x11_get_default_display ();
fbconfigs = glXGetFBConfigs (dpy,
clutter_x11_get_default_screen (),
&n_elements);
db = G_MAXSHORT;
stencil = G_MAXSHORT;
mipmap = 0;
rgba = 0;
found = n_elements;
for (i = 0; i < n_elements; i++)
{
XVisualInfo *vi;
int visual_depth;
vi = glXGetVisualFromFBConfig (dpy,
fbconfigs[i]);
if (vi == NULL)
continue;
visual_depth = vi->depth;
XFree (vi);
if (visual_depth != depth)
continue;
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_ALPHA_SIZE,
&alpha);
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BUFFER_SIZE,
&value);
if (value != depth && (value - alpha) != depth)
continue;
value = 0;
if (depth == 32)
{
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BIND_TO_TEXTURE_RGBA_EXT,
&value);
if (value)
rgba = 1;
}
if (!value)
{
if (rgba)
continue;
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BIND_TO_TEXTURE_RGB_EXT,
&value);
if (!value)
continue;
}
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_DOUBLEBUFFER,
&value);
if (value > db)
continue;
db = value;
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_STENCIL_SIZE,
&value);
if (value > stencil)
continue;
stencil = value;
found = i;
}
if (found != n_elements)
{
ret = g_malloc (sizeof (GLXFBConfig));
*ret = fbconfigs[found];
}
if (n_elements)
XFree (fbconfigs);
return ret;
}
static void
clutter_glx_texture_pixmap_create_glx_pixmap (ClutterGLXTexturePixmap *texture)
{
ClutterGLXTexturePixmapPrivate *priv = texture->priv;
GLXPixmap glx_pixmap;
int attribs[7], i = 0;
GLXFBConfig *fbconfig;
Display *dpy;
guint depth;
Pixmap pixmap;
ClutterBackendGLX *backend_glx;
backend_glx = CLUTTER_BACKEND_GLX(clutter_get_default_backend ());
dpy = clutter_x11_get_default_display ();
g_object_get (texture,
"pixmap-depth", &depth,
"pixmap", &pixmap,
NULL);
fbconfig = get_fbconfig_for_depth (depth);
if (!fbconfig)
{
g_critical ("Could not find an FBConfig for selected pixmap");
return;
}
attribs[i++] = GLX_TEXTURE_FORMAT_EXT;
if (depth == 24)
{
attribs[i++] = GLX_TEXTURE_FORMAT_RGB_EXT;
}
else if (depth == 32)
{
attribs[i++] = GLX_TEXTURE_FORMAT_RGBA_EXT;
}
else
{
g_critical ("Pixmap with depth bellow 24 are not supported");
return;
}
attribs[i++] = GLX_MIPMAP_TEXTURE_EXT;
attribs[i++] = 0;
attribs[i++] = GLX_TEXTURE_TARGET_EXT;
if (priv->target_type == CGL_TEXTURE_RECTANGLE_ARB)
attribs[i++] = GLX_TEXTURE_RECTANGLE_EXT;
else
attribs[i++] = GLX_TEXTURE_2D_EXT;
attribs[i++] = None;
clutter_x11_trap_x_errors ();
glx_pixmap = glXCreatePixmap (dpy,
*fbconfig,
pixmap,
attribs);
XSync (dpy, FALSE);
clutter_x11_untrap_x_errors ();
g_free (fbconfig);
if (glx_pixmap != None)
{
if (priv->glx_pixmap)
{
if (_have_tex_from_pixmap_ext &&
CLUTTER_ACTOR_IS_REALIZED (texture) &&
priv->bound)
{
cogl_texture_bind (priv->target_type, priv->texture_id);
clutter_x11_trap_x_errors ();
(_gl_release_tex_image) (dpy,
priv->glx_pixmap,
GLX_FRONT_LEFT_EXT);
XSync (clutter_x11_get_default_display(), FALSE);
if (clutter_x11_untrap_x_errors ())
g_warning ("Failed to bind texture pixmap");
}
clutter_x11_trap_x_errors ();
glXDestroyGLXPixmap (dpy, priv->glx_pixmap);
XSync (dpy, FALSE);
clutter_x11_untrap_x_errors ();
}
priv->glx_pixmap = glx_pixmap;
}
}
static void
clutter_glx_texture_pixmap_update_area (ClutterX11TexturePixmap *texture,
gint x,
gint y,
gint width,
gint height)
{
ClutterGLXTexturePixmapPrivate *priv;
Display *dpy;
priv = CLUTTER_GLX_TEXTURE_PIXMAP (texture)->priv;
dpy = clutter_x11_get_default_display();
if (!_have_tex_from_pixmap_ext)
{
CLUTTER_X11_TEXTURE_PIXMAP_CLASS
(texture)->update_area (texture,
x, y,
width, height);
return;
}
if (!CLUTTER_ACTOR_IS_REALIZED (texture))
return;
cogl_texture_bind (priv->target_type, priv->texture_id);
if (_have_tex_from_pixmap_ext)
{
clutter_x11_trap_x_errors ();
(_gl_bind_tex_image) (dpy,
priv->glx_pixmap,
GLX_FRONT_LEFT_EXT,
NULL);
XSync (clutter_x11_get_default_display(), FALSE);
if (clutter_x11_untrap_x_errors ())
g_warning ("Failed to bind texture pixmap");
priv->bound = TRUE;
}
}
/**
* clutter_glx_texture_pixmap_new_with_pixmap:
* @pixmap: the X Pixmap to which this texture should be bound
* @width: the width of the X pixmap
* @height: the height of the X pixmap
* @depth: the depth of the X pixmap
*
* Return value: A new #ClutterGLXTexturePixmap bound to the given X Pixmap
*
* Since: 0.8
**/
ClutterActor *
clutter_glx_texture_pixmap_new_with_pixmap (Pixmap pixmap)
{
ClutterActor *actor;
actor = g_object_new (CLUTTER_GLX_TYPE_TEXTURE_PIXMAP,
"pixmap", pixmap,
NULL);
return actor;
}
/**
* clutter_glx_texture_pixmap_new:
*
* Return value: A new #ClutterGLXTexturePixmap
*
* Since: 0.8
**/
ClutterActor *
clutter_glx_texture_pixmap_new (void)
{
ClutterActor *actor;
actor = g_object_new (CLUTTER_GLX_TYPE_TEXTURE_PIXMAP, NULL);
return actor;
}
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