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mutter/cogl/winsys/cogl-texture-pixmap-x11.c
Neil Roberts ec718d4ca4 Rename the third texure coordinate from 'r' to 'p' 
Using 'r' to name the third component is problematic because that is
commonly used to represent the red component of a vector representing
a color. Under GLSL this is awkward because the texture swizzling for
a vector uses a single letter for each component and the names for
colors, textures and positions are synonymous. GLSL works around this
by naming the components of the texture s, t, p and q. Cogl already
effectively already exposes this naming because it exposes GLSL so it
makes sense to use that naming consistently. Another alternative could
be u, v and w. This is what Blender and Direct3D use. However the w
component conflicts with the w component of a position vertex.
2010-07-13 14:29:07 +01:00

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
* Johan Bilien <johan.bilien@nokia.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-texture-pixmap-x11.h"
#include "cogl-texture-pixmap-x11-private.h"
#include "cogl-bitmap-private.h"
#include "cogl-texture-private.h"
#include "cogl-texture-driver.h"
#include "cogl-texture-2d-private.h"
#include "cogl-texture-rectangle-private.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-xlib.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#include <string.h>
#include <math.h>
#define glXBindTexImage ctx->winsys.pf_glXBindTexImage
#define glXReleaseTexImage ctx->winsys.pf_glXReleaseTexImage
static void _cogl_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap);
COGL_TEXTURE_DEFINE (TexturePixmapX11, texture_pixmap_x11);
static const CoglTextureVtable cogl_texture_pixmap_x11_vtable;
static void
cogl_damage_rectangle_union (CoglDamageRectangle *damage_rect,
int x,
int y,
int width,
int height)
{
/* If the damage region is empty then we'll just copy the new
rectangle directly */
if (damage_rect->x1 == damage_rect->x2 ||
damage_rect->y1 == damage_rect->y2)
{
damage_rect->x1 = x;
damage_rect->y1 = y;
damage_rect->x2 = x + width;
damage_rect->y2 = y + height;
}
else
{
if (damage_rect->x1 > x)
damage_rect->x1 = x;
if (damage_rect->y1 > y)
damage_rect->y1 = y;
if (damage_rect->x2 < x + width)
damage_rect->x2 = x + width;
if (damage_rect->y2 < y + height)
damage_rect->y2 = y + height;
}
}
static gboolean
cogl_damage_rectangle_is_whole (const CoglDamageRectangle *damage_rect,
unsigned int width,
unsigned int height)
{
return (damage_rect->x1 == 0 && damage_rect->y1 == 0
&& damage_rect->x2 == width && damage_rect->y2 == height);
}
static void
process_damage_event (CoglTexturePixmapX11 *tex_pixmap,
XDamageNotifyEvent *damage_event)
{
Display *display;
enum { DO_NOTHING, NEEDS_SUBTRACT, NEED_BOUNDING_BOX } handle_mode;
_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
display = _cogl_xlib_get_display ();
COGL_NOTE (TEXTURE_PIXMAP, "Damage event received for %p", tex_pixmap);
switch (tex_pixmap->damage_report_level)
{
case COGL_TEXTURE_PIXMAP_X11_DAMAGE_RAW_RECTANGLES:
/* For raw rectangles we don't need do look at the damage region
at all because the damage area is directly given in the event
struct and the reporting of events is not affected by
clearing the damage region */
handle_mode = DO_NOTHING;
break;
case COGL_TEXTURE_PIXMAP_X11_DAMAGE_DELTA_RECTANGLES:
case COGL_TEXTURE_PIXMAP_X11_DAMAGE_NON_EMPTY:
/* For delta rectangles and non empty we'll query the damage
region for the bounding box */
handle_mode = NEED_BOUNDING_BOX;
break;
case COGL_TEXTURE_PIXMAP_X11_DAMAGE_BOUNDING_BOX:
/* For bounding box we need to clear the damage region but we
don't actually care what it was because the damage event
itself contains the bounding box of the region */
handle_mode = NEEDS_SUBTRACT;
break;
default:
g_assert_not_reached ();
}
/* If the damage already covers the whole rectangle then we don't
need to request the bounding box of the region because we're
going to update the whole texture anyway. */
if (cogl_damage_rectangle_is_whole (&tex_pixmap->damage_rect,
tex_pixmap->width,
tex_pixmap->height))
{
if (handle_mode != DO_NOTHING)
XDamageSubtract (display, tex_pixmap->damage, None, None);
}
else if (handle_mode == NEED_BOUNDING_BOX)
{
XserverRegion parts;
int r_count;
XRectangle r_bounds;
XRectangle *r_damage;
/* We need to extract the damage region so we can get the
bounding box */
parts = XFixesCreateRegion (display, 0, 0);
XDamageSubtract (display, tex_pixmap->damage, None, parts);
r_damage = XFixesFetchRegionAndBounds (display,
parts,
&r_count,
&r_bounds);
cogl_damage_rectangle_union (&tex_pixmap->damage_rect,
r_bounds.x,
r_bounds.y,
r_bounds.width,
r_bounds.height);
if (r_damage)
XFree (r_damage);
XFixesDestroyRegion (display, parts);
}
else
{
if (handle_mode == NEEDS_SUBTRACT)
/* We still need to subtract from the damage region but we
don't care what the region actually was */
XDamageSubtract (display, tex_pixmap->damage, None, None);
cogl_damage_rectangle_union (&tex_pixmap->damage_rect,
damage_event->area.x,
damage_event->area.y,
damage_event->area.width,
damage_event->area.height);
}
/* If we're using the texture from pixmap extension then there's no
point in getting the region and we can just mark that the texture
needs updating */
#ifdef COGL_HAS_GLX_SUPPORT
tex_pixmap->bind_tex_image_queued = TRUE;
#endif
}
static CoglXlibFilterReturn
_cogl_texture_pixmap_x11_filter (XEvent *event, gpointer data)
{
CoglTexturePixmapX11 *tex_pixmap = data;
_COGL_GET_CONTEXT (ctxt, COGL_XLIB_FILTER_CONTINUE);
if (event->type == ctxt->winsys.damage_base + XDamageNotify)
{
XDamageNotifyEvent *damage_event = (XDamageNotifyEvent *) event;
if (damage_event->damage == tex_pixmap->damage)
process_damage_event (tex_pixmap, damage_event);
}
return COGL_XLIB_FILTER_CONTINUE;
}
#ifdef COGL_HAS_GLX_SUPPORT
static gboolean
get_fbconfig_for_depth (unsigned int depth,
GLXFBConfig *fbconfig_ret,
gboolean *can_mipmap_ret)
{
GLXFBConfig *fbconfigs;
int n_elements, i;
Display *dpy;
int db, stencil, alpha, mipmap, rgba, value;
int spare_cache_slot = 0;
gboolean found = FALSE;
_COGL_GET_CONTEXT (ctxt, FALSE);
/* Check if we've already got a cached config for this depth */
for (i = 0; i < COGL_WINSYS_N_CACHED_CONFIGS; i++)
if (ctxt->winsys.glx_cached_configs[i].depth == -1)
spare_cache_slot = i;
else if (ctxt->winsys.glx_cached_configs[i].depth == depth)
{
*fbconfig_ret = ctxt->winsys.glx_cached_configs[i].fb_config;
*can_mipmap_ret = ctxt->winsys.glx_cached_configs[i].can_mipmap;
return ctxt->winsys.glx_cached_configs[i].found;
}
dpy = _cogl_xlib_get_display ();
fbconfigs = glXGetFBConfigs (dpy, DefaultScreen (dpy),
&n_elements);
db = G_MAXSHORT;
stencil = G_MAXSHORT;
mipmap = 0;
rgba = 0;
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;
/* glGenerateMipmap is defined in the offscreen extension */
if (cogl_features_available (COGL_FEATURE_OFFSCREEN))
{
glXGetFBConfigAttrib (dpy,
fbconfigs[i],
GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
&value);
if (value < mipmap)
continue;
mipmap = value;
}
*fbconfig_ret = fbconfigs[i];
*can_mipmap_ret = mipmap;
found = TRUE;
}
if (n_elements)
XFree (fbconfigs);
ctxt->winsys.glx_cached_configs[spare_cache_slot].depth = depth;
ctxt->winsys.glx_cached_configs[spare_cache_slot].found = found;
ctxt->winsys.glx_cached_configs[spare_cache_slot].fb_config = *fbconfig_ret;
ctxt->winsys.glx_cached_configs[spare_cache_slot].can_mipmap = mipmap;
return found;
}
static gboolean
should_use_rectangle (void)
{
_COGL_GET_CONTEXT (ctxt, FALSE);
if (ctxt->winsys.rectangle_state == COGL_WINSYS_RECTANGLE_STATE_UNKNOWN)
{
if (cogl_features_available (COGL_FEATURE_TEXTURE_RECTANGLE))
{
const char *rect_env;
/* Use the rectangle only if it is available and either:
the COGL_PIXMAP_TEXTURE_RECTANGLE environment variable is
set to 'force'
*or*
the env var is set to 'allow' or not set and NPOTs textures
are not available */
ctxt->winsys.rectangle_state =
cogl_features_available (COGL_FEATURE_TEXTURE_NPOT) ?
COGL_WINSYS_RECTANGLE_STATE_DISABLE :
COGL_WINSYS_RECTANGLE_STATE_ENABLE;
if ((rect_env = g_getenv ("COGL_PIXMAP_TEXTURE_RECTANGLE")) ||
/* For compatibility, we'll also look at the old Clutter
environment variable */
(rect_env = g_getenv ("CLUTTER_PIXMAP_TEXTURE_RECTANGLE")))
{
if (g_ascii_strcasecmp (rect_env, "force") == 0)
ctxt->winsys.rectangle_state =
COGL_WINSYS_RECTANGLE_STATE_ENABLE;
else if (g_ascii_strcasecmp (rect_env, "disable") == 0)
ctxt->winsys.rectangle_state =
COGL_WINSYS_RECTANGLE_STATE_DISABLE;
else if (g_ascii_strcasecmp (rect_env, "allow"))
g_warning ("Unknown value for COGL_PIXMAP_TEXTURE_RECTANGLE, "
"should be 'force' or 'disable'");
}
}
else
ctxt->winsys.rectangle_state = COGL_WINSYS_RECTANGLE_STATE_DISABLE;
}
return ctxt->winsys.rectangle_state == COGL_WINSYS_RECTANGLE_STATE_ENABLE;
}
static void
try_create_glx_pixmap (CoglTexturePixmapX11 *tex_pixmap,
gboolean mipmap)
{
Display *dpy;
/* We have to initialize this *opaque* variable because gcc tries to
* be too smart for its own good and warns that the variable may be
* used uninitialized otherwise. */
GLXFBConfig fb_config = (GLXFBConfig)0;
int attribs[7];
int i = 0;
GLenum target;
CoglXlibTrapState trap_state;
_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
tex_pixmap->pixmap_bound = FALSE;
tex_pixmap->glx_pixmap = None;
if ((ctxt->winsys.feature_flags &
COGL_WINSYS_FEATURE_TEXTURE_FROM_PIXMAP) == 0)
return;
dpy = _cogl_xlib_get_display ();
if (!get_fbconfig_for_depth (tex_pixmap->depth, &fb_config,
&tex_pixmap->glx_can_mipmap))
{
COGL_NOTE (TEXTURE_PIXMAP, "No suitable FBConfig found for depth %i",
tex_pixmap->depth);
return;
}
if (should_use_rectangle ())
{
target = GLX_TEXTURE_RECTANGLE_EXT;
tex_pixmap->glx_can_mipmap = FALSE;
}
else
target = GLX_TEXTURE_2D_EXT;
if (!tex_pixmap->glx_can_mipmap)
mipmap = FALSE;
attribs[i++] = GLX_TEXTURE_FORMAT_EXT;
if (tex_pixmap->depth == 24)
attribs[i++] = GLX_TEXTURE_FORMAT_RGB_EXT;
else if (tex_pixmap->depth == 32)
attribs[i++] = GLX_TEXTURE_FORMAT_RGBA_EXT;
else
return;
attribs[i++] = GLX_MIPMAP_TEXTURE_EXT;
attribs[i++] = mipmap;
attribs[i++] = GLX_TEXTURE_TARGET_EXT;
attribs[i++] = target;
attribs[i++] = None;
/* We need to trap errors from glXCreatePixmap because it can
sometimes fail during normal usage. For example on NVidia it gets
upset if you try to create two GLXPixmaps for the same
drawable. */
_cogl_xlib_trap_errors (&trap_state);
tex_pixmap->glx_pixmap = glXCreatePixmap (dpy,
fb_config,
tex_pixmap->pixmap,
attribs);
tex_pixmap->glx_pixmap_has_mipmap = mipmap;
XSync (dpy, False);
if (_cogl_xlib_untrap_errors (&trap_state))
{
COGL_NOTE (TEXTURE_PIXMAP, "Failed to create pixmap for %p", tex_pixmap);
_cogl_xlib_trap_errors (&trap_state);
glXDestroyPixmap (dpy, tex_pixmap->glx_pixmap);
XSync (dpy, False);
_cogl_xlib_untrap_errors (&trap_state);
tex_pixmap->glx_pixmap = None;
}
}
#endif /* COGL_HAS_GLX_SUPPORT */
static void
set_damage_object_internal (CoglTexturePixmapX11 *tex_pixmap,
Damage damage,
CoglTexturePixmapX11ReportLevel report_level)
{
if (tex_pixmap->damage)
{
_cogl_xlib_remove_filter (_cogl_texture_pixmap_x11_filter, tex_pixmap);
if (tex_pixmap->damage_owned)
{
XDamageDestroy (_cogl_xlib_get_display (), tex_pixmap->damage);
tex_pixmap->damage_owned = FALSE;
}
}
tex_pixmap->damage = damage;
tex_pixmap->damage_report_level = report_level;
if (damage)
_cogl_xlib_add_filter (_cogl_texture_pixmap_x11_filter, tex_pixmap);
}
CoglHandle
cogl_texture_pixmap_x11_new (guint32 pixmap,
gboolean automatic_updates)
{
CoglTexturePixmapX11 *tex_pixmap = g_new (CoglTexturePixmapX11, 1);
Display *display = _cogl_xlib_get_display ();
Window pixmap_root_window;
int pixmap_x, pixmap_y;
unsigned int pixmap_border_width;
CoglTexture *tex = COGL_TEXTURE (tex_pixmap);
XWindowAttributes window_attributes;
_COGL_GET_CONTEXT (ctxt, COGL_INVALID_HANDLE);
tex->vtable = &cogl_texture_pixmap_x11_vtable;
tex_pixmap->pixmap = pixmap;
tex_pixmap->image = NULL;
tex_pixmap->shm_info.shmid = -1;
tex_pixmap->tex = COGL_INVALID_HANDLE;
tex_pixmap->damage_owned = FALSE;
tex_pixmap->damage = 0;
if (!XGetGeometry (display, pixmap, &pixmap_root_window,
&pixmap_x, &pixmap_y,
&tex_pixmap->width, &tex_pixmap->height,
&pixmap_border_width, &tex_pixmap->depth))
{
g_free (tex_pixmap);
g_warning ("Unable to query pixmap size");
return COGL_INVALID_HANDLE;
}
/* We need a visual to use for shared memory images so we'll query
it from the pixmap's root window */
if (!XGetWindowAttributes (display, pixmap_root_window, &window_attributes))
{
g_free (tex_pixmap);
g_warning ("Unable to query root window attributes");
return COGL_INVALID_HANDLE;
}
tex_pixmap->visual = window_attributes.visual;
/* If automatic updates are requested and the Xlib connection
supports damage events then we'll register a damage object on the
pixmap */
if (automatic_updates && ctxt->winsys.damage_base >= 0)
{
Damage damage = XDamageCreate (display,
pixmap,
XDamageReportBoundingBox);
set_damage_object_internal (tex_pixmap,
damage,
COGL_TEXTURE_PIXMAP_X11_DAMAGE_BOUNDING_BOX);
tex_pixmap->damage_owned = TRUE;
}
/* Assume the entire pixmap is damaged to begin with */
tex_pixmap->damage_rect.x1 = 0;
tex_pixmap->damage_rect.x2 = tex_pixmap->width;
tex_pixmap->damage_rect.y1 = 0;
tex_pixmap->damage_rect.y2 = tex_pixmap->height;
#ifdef COGL_HAS_GLX_SUPPORT
try_create_glx_pixmap (tex_pixmap, FALSE);
tex_pixmap->glx_tex = COGL_INVALID_HANDLE;
tex_pixmap->bind_tex_image_queued = TRUE;
tex_pixmap->use_glx_texture = FALSE;
#endif
return _cogl_texture_pixmap_x11_handle_new (tex_pixmap);
}
/* Tries to allocate enough shared mem to handle a full size
* update size of the X Pixmap. */
static void
try_alloc_shm (CoglTexturePixmapX11 *tex_pixmap)
{
XImage *dummy_image;
Display *display;
display = _cogl_xlib_get_display ();
if (!XShmQueryExtension (display))
return;
/* We are creating a dummy_image so we can have Xlib calculate
* image->bytes_per_line - including any magic padding it may
* want - for the largest possible ximage we might need to use
* when handling updates to the texture.
*
* Note: we pass a NULL shminfo here, but that has no bearing
* on the setup of the XImage, except that ximage->obdata will
* == NULL.
*/
dummy_image =
XShmCreateImage (display,
tex_pixmap->visual,
tex_pixmap->depth,
ZPixmap,
NULL,
NULL, /* shminfo, */
tex_pixmap->width,
tex_pixmap->height);
if (!dummy_image)
goto failed_image_create;
tex_pixmap->shm_info.shmid = shmget (IPC_PRIVATE,
dummy_image->bytes_per_line
* dummy_image->height,
IPC_CREAT | 0777);
if (tex_pixmap->shm_info.shmid == -1)
goto failed_shmget;
tex_pixmap->shm_info.shmaddr = shmat (tex_pixmap->shm_info.shmid, 0, 0);
if (tex_pixmap->shm_info.shmaddr == (void *) -1)
goto failed_shmat;
tex_pixmap->shm_info.readOnly = False;
if (XShmAttach (display, &tex_pixmap->shm_info) == 0)
goto failed_xshmattach;
XDestroyImage (dummy_image);
return;
failed_xshmattach:
g_warning ("XShmAttach failed");
shmdt (tex_pixmap->shm_info.shmaddr);
failed_shmat:
g_warning ("shmat failed");
shmctl (tex_pixmap->shm_info.shmid, IPC_RMID, 0);
failed_shmget:
g_warning ("shmget failed");
XDestroyImage (dummy_image);
failed_image_create:
tex_pixmap->shm_info.shmid = -1;
}
void
cogl_texture_pixmap_x11_update_area (CoglHandle handle,
int x,
int y,
int width,
int height)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (handle);
if (!cogl_is_texture_pixmap_x11 (handle))
return;
/* We'll queue the update for both the GLX texture and the regular
texture because we can't determine which will be needed until we
actually render something */
#ifdef COGL_HAS_GLX_SUPPORT
tex_pixmap->bind_tex_image_queued = TRUE;
#endif
cogl_damage_rectangle_union (&tex_pixmap->damage_rect,
x, y, width, height);
}
gboolean
cogl_texture_pixmap_x11_is_using_tfp_extension (CoglHandle handle)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (handle);
if (!cogl_is_texture_pixmap_x11 (tex_pixmap))
return FALSE;
#ifdef COGL_HAS_GLX_SUPPORT
return tex_pixmap->glx_pixmap != None;
#else
return FALSE;
#endif
}
void
cogl_texture_pixmap_x11_set_damage_object (CoglHandle handle,
guint32 damage,
CoglTexturePixmapX11ReportLevel
report_level)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (handle);
_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
if (!cogl_is_texture_pixmap_x11 (tex_pixmap))
return;
if (ctxt->winsys.damage_base >= 0)
set_damage_object_internal (tex_pixmap, damage, report_level);
}
static void
_cogl_texture_pixmap_x11_update_image_texture (CoglTexturePixmapX11 *tex_pixmap)
{
Display *display;
CoglPixelFormat image_format;
XImage *image;
int src_x, src_y;
int x, y, width, height;
display = _cogl_xlib_get_display ();
/* If the damage region is empty then there's nothing to do */
if (tex_pixmap->damage_rect.x2 == tex_pixmap->damage_rect.x1)
return;
x = tex_pixmap->damage_rect.x1;
y = tex_pixmap->damage_rect.y1;
width = tex_pixmap->damage_rect.x2 - x;
height = tex_pixmap->damage_rect.y2 - y;
/* We lazily create the texture the first time it is needed in case
this texture can be entirely handled using the GLX texture
instead */
if (tex_pixmap->tex == COGL_INVALID_HANDLE)
{
CoglPixelFormat texture_format;
texture_format = (tex_pixmap->depth >= 32
? COGL_PIXEL_FORMAT_RGBA_8888_PRE
: COGL_PIXEL_FORMAT_RGB_888);
tex_pixmap->tex = cogl_texture_new_with_size (tex_pixmap->width,
tex_pixmap->height,
COGL_TEXTURE_NONE,
texture_format);
}
if (tex_pixmap->image == NULL)
{
/* If we also haven't got a shm segment then this must be the
first time we've tried to update, so lets try allocating shm
first */
if (tex_pixmap->shm_info.shmid == -1)
try_alloc_shm (tex_pixmap);
if (tex_pixmap->shm_info.shmid == -1)
{
COGL_NOTE (TEXTURE_PIXMAP, "Updating %p using XGetImage", tex_pixmap);
/* We'll fallback to using a regular XImage. We'll download
the entire area instead of a sub region because presumably
if this is the first update then the entire pixmap is
needed anyway and it saves trying to manually allocate an
XImage at the right size */
tex_pixmap->image = XGetImage (display,
tex_pixmap->pixmap,
0, 0,
tex_pixmap->width, tex_pixmap->height,
AllPlanes, ZPixmap);
image = tex_pixmap->image;
src_x = x;
src_y = y;
}
else
{
COGL_NOTE (TEXTURE_PIXMAP, "Updating %p using XShmGetImage",
tex_pixmap);
/* Create a temporary image using the beginning of the
shared memory segment and the right size for the region
we want to update. We need to reallocate the XImage every
time because there is no XShmGetSubImage. */
image = XShmCreateImage (display,
tex_pixmap->visual,
tex_pixmap->depth,
ZPixmap,
NULL,
&tex_pixmap->shm_info,
width,
height);
image->data = tex_pixmap->shm_info.shmaddr;
src_x = 0;
src_y = 0;
XShmGetImage (display, tex_pixmap->pixmap, image, x, y, AllPlanes);
}
}
else
{
COGL_NOTE (TEXTURE_PIXMAP, "Updating %p using XGetSubImage", tex_pixmap);
image = tex_pixmap->image;
src_x = x;
src_y = y;
XGetSubImage (display,
tex_pixmap->pixmap,
x, y, width, height,
AllPlanes, ZPixmap,
image,
x, y);
}
/* xlib doesn't appear to fill in image->{red,green,blue}_mask so
this just assumes that the image is stored as ARGB from most
significant byte to to least significant. If the format is little
endian that means the order will be BGRA in memory */
switch (image->bits_per_pixel)
{
default:
case 32:
{
/* If the pixmap is actually non-packed-pixel RGB format then
the texture would have been created in RGB_888 format so Cogl
will ignore the alpha channel and effectively pack it for
us */
image_format = COGL_PIXEL_FORMAT_RGBA_8888_PRE;
/* If the format is actually big endian then the alpha
component will come first */
if (image->byte_order == MSBFirst)
image_format |= COGL_AFIRST_BIT;
}
break;
case 24:
image_format = COGL_PIXEL_FORMAT_RGB_888;
break;
case 16:
/* FIXME: this should probably swap the orders around if the
endianness does not match */
image_format = COGL_PIXEL_FORMAT_RGB_565;
break;
}
if (image->bits_per_pixel != 16)
{
/* If the image is in little-endian then the order in memory is
reversed */
if (image->byte_order == LSBFirst)
image_format |= COGL_BGR_BIT;
}
cogl_texture_set_region (tex_pixmap->tex,
src_x, src_y,
x, y, width, height,
image->width,
image->height,
image_format,
image->bytes_per_line,
(const guint8 *) image->data);
/* If we have a shared memory segment then the XImage would be a
temporary one with no data allocated so we can just XFree it */
if (tex_pixmap->shm_info.shmid != -1)
XFree (image);
memset (&tex_pixmap->damage_rect, 0, sizeof (CoglDamageRectangle));
}
#ifdef COGL_HAS_GLX_SUPPORT
static void
_cogl_texture_pixmap_x11_free_glx_pixmap (CoglTexturePixmapX11 *tex_pixmap)
{
if (tex_pixmap->glx_pixmap)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (tex_pixmap->pixmap_bound)
glXReleaseTexImage (_cogl_xlib_get_display (), tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT);
glXDestroyPixmap (_cogl_xlib_get_display (), tex_pixmap->glx_pixmap);
tex_pixmap->glx_pixmap = None;
tex_pixmap->pixmap_bound = FALSE;
}
}
static gboolean
_cogl_texture_pixmap_x11_update_glx_texture (CoglTexturePixmapX11 *tex_pixmap,
gboolean needs_mipmap)
{
gboolean ret = TRUE;
_COGL_GET_CONTEXT (ctx, FALSE);
/* If we don't have a GLX pixmap then fallback */
if (tex_pixmap->glx_pixmap == None)
ret = FALSE;
else
{
/* Lazily create a texture to hold the pixmap */
if (tex_pixmap->glx_tex == COGL_INVALID_HANDLE)
{
CoglPixelFormat texture_format;
texture_format = (tex_pixmap->depth >= 32 ?
COGL_PIXEL_FORMAT_RGBA_8888_PRE :
COGL_PIXEL_FORMAT_RGB_888);
if (should_use_rectangle ())
{
tex_pixmap->glx_tex =
_cogl_texture_rectangle_new_with_size (tex_pixmap->width,
tex_pixmap->height,
COGL_TEXTURE_NO_ATLAS,
texture_format);
if (tex_pixmap->glx_tex)
COGL_NOTE (TEXTURE_PIXMAP, "Created a texture rectangle for %p",
tex_pixmap);
else
{
COGL_NOTE (TEXTURE_PIXMAP, "Falling back for %p because a "
"texture rectangle could not be created",
tex_pixmap);
_cogl_texture_pixmap_x11_free_glx_pixmap (tex_pixmap);
ret = FALSE;
}
}
else
{
tex_pixmap->glx_tex =
_cogl_texture_2d_new_with_size (tex_pixmap->width,
tex_pixmap->height,
COGL_TEXTURE_NO_ATLAS,
texture_format);
if (tex_pixmap->glx_tex)
COGL_NOTE (TEXTURE_PIXMAP, "Created a texture 2d for %p",
tex_pixmap);
else
{
COGL_NOTE (TEXTURE_PIXMAP, "Falling back for %p because a "
"texture 2d could not be created",
tex_pixmap);
_cogl_texture_pixmap_x11_free_glx_pixmap (tex_pixmap);
ret = FALSE;
}
}
}
if (ret && needs_mipmap)
{
/* If we can't support mipmapping then temporarily fallback */
if (!tex_pixmap->glx_can_mipmap)
ret = FALSE;
/* Recreate the GLXPixmap if it wasn't previously created with a
mipmap tree */
else if (!tex_pixmap->glx_pixmap_has_mipmap)
{
_cogl_texture_pixmap_x11_free_glx_pixmap (tex_pixmap);
COGL_NOTE (TEXTURE_PIXMAP, "Recreating GLXPixmap with mipmap "
"support for %p", tex_pixmap);
try_create_glx_pixmap (tex_pixmap, TRUE);
/* If the pixmap failed then we'll permanently fallback to using
XImage. This shouldn't happen */
if (tex_pixmap->glx_pixmap == None)
{
COGL_NOTE (TEXTURE_PIXMAP, "Falling back to XGetImage "
"updates for %p because creating the GLXPixmap "
"with mipmap support failed", tex_pixmap);
if (tex_pixmap->glx_tex)
cogl_handle_unref (tex_pixmap->glx_tex);
ret = FALSE;
}
else
tex_pixmap->bind_tex_image_queued = TRUE;
}
}
if (ret && tex_pixmap->bind_tex_image_queued)
{
GLuint gl_handle, gl_target;
cogl_texture_get_gl_texture (tex_pixmap->glx_tex,
&gl_handle, &gl_target);
COGL_NOTE (TEXTURE_PIXMAP, "Rebinding GLXPixmap for %p", tex_pixmap);
GE( _cogl_bind_gl_texture_transient (gl_target, gl_handle, FALSE) );
if (tex_pixmap->pixmap_bound)
glXReleaseTexImage (_cogl_xlib_get_display (),
tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT);
glXBindTexImage (_cogl_xlib_get_display (),
tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT,
NULL);
/* According to the recommended usage in the spec for
GLX_EXT_texture_pixmap we should release the texture after
we've finished drawing with it and it is undefined what
happens if you render to a pixmap that is bound to a
texture. However that would require the texture backend to
know when Cogl has finished painting and it may be more
expensive to keep unbinding the texture. Leaving it bound
appears to work on Mesa and NVidia drivers and it is also
what Compiz does so it is probably ok */
tex_pixmap->bind_tex_image_queued = FALSE;
tex_pixmap->pixmap_bound = TRUE;
_cogl_texture_2d_externally_modified (tex_pixmap->glx_tex);
}
}
return ret;
}
static void
_cogl_texture_pixmap_x11_set_use_glx_texture (CoglTexturePixmapX11 *tex_pixmap,
gboolean new_value)
{
if (tex_pixmap->use_glx_texture != new_value)
{
/* Notify cogl-material.c that the texture's underlying GL texture
* storage is changing so it knows it may need to bind a new texture
* if the CoglTexture is reused with the same texture unit. */
_cogl_material_texture_storage_change_notify (tex_pixmap);
tex_pixmap->use_glx_texture = new_value;
}
}
#endif /* COGL_HAS_GLX_SUPPORT */
static void
_cogl_texture_pixmap_x11_update (CoglTexturePixmapX11 *tex_pixmap,
gboolean needs_mipmap)
{
#ifdef COGL_HAS_GLX_SUPPORT
/* First try updating with GLX TFP */
if (_cogl_texture_pixmap_x11_update_glx_texture (tex_pixmap, needs_mipmap))
{
_cogl_texture_pixmap_x11_set_use_glx_texture (tex_pixmap, TRUE);
return;
}
/* If it didn't work then fallback to using XGetImage. This may be
temporary */
_cogl_texture_pixmap_x11_set_use_glx_texture (tex_pixmap, FALSE);
#endif /* COGL_HAS_GLX_SUPPORT */
_cogl_texture_pixmap_x11_update_image_texture (tex_pixmap);
}
static CoglHandle
_cogl_texture_pixmap_x11_get_texture (CoglTexturePixmapX11 *tex_pixmap)
{
CoglHandle tex;
int i;
/* We try getting the texture twice, once without flushing the
updates and once with. If pre_paint has been called already then
we should have a good idea of which texture to use so we don't
want to mess with that by ensuring the updates. However, if we
couldn't find a texture then we'll just make a best guess by
flushing without expecting mipmap support and try again. This
would happen for example if an application calls
get_gl_texture before the first paint */
for (i = 0; i < 2; i++)
{
#ifdef COGL_HAS_GLX_SUPPORT
if (tex_pixmap->use_glx_texture)
tex = tex_pixmap->glx_tex;
else
#endif
tex = tex_pixmap->tex;
if (tex)
return tex;
_cogl_texture_pixmap_x11_update (tex_pixmap, FALSE);
}
g_assert_not_reached ();
return COGL_INVALID_HANDLE;
}
static gboolean
_cogl_texture_pixmap_x11_set_region (CoglTexture *tex,
int src_x,
int src_y,
int dst_x,
int dst_y,
unsigned int dst_width,
unsigned int dst_height,
CoglBitmap *bmp)
{
/* This doesn't make much sense for texture from pixmap so it's not
supported */
return FALSE;
}
static gboolean
_cogl_texture_pixmap_x11_get_data (CoglTexture *tex,
CoglPixelFormat format,
unsigned int rowstride,
guint8 *data)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
return cogl_texture_get_data (child_tex, format, rowstride, data);
}
static void
_cogl_texture_pixmap_x11_foreach_sub_texture_in_region
(CoglTexture *tex,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglTextureSliceCallback callback,
void *user_data)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
_cogl_texture_foreach_sub_texture_in_region (child_tex,
virtual_tx_1,
virtual_ty_1,
virtual_tx_2,
virtual_ty_2,
callback,
user_data);
}
static int
_cogl_texture_pixmap_x11_get_max_waste (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
return cogl_texture_get_max_waste (child_tex);
}
static gboolean
_cogl_texture_pixmap_x11_is_sliced (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
return cogl_texture_is_sliced (child_tex);
}
static gboolean
_cogl_texture_pixmap_x11_can_hardware_repeat (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
return cogl_texture_get_max_waste (child_tex);
}
static void
_cogl_texture_pixmap_x11_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
_cogl_texture_transform_coords_to_gl (child_tex, s, t);
}
static CoglTransformResult
_cogl_texture_pixmap_x11_transform_quad_coords_to_gl (CoglTexture *tex,
float *coords)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
return _cogl_texture_transform_quad_coords_to_gl (child_tex, coords);
}
static gboolean
_cogl_texture_pixmap_x11_get_gl_texture (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
return cogl_texture_get_gl_texture (child_tex,
out_gl_handle,
out_gl_target);
}
static void
_cogl_texture_pixmap_x11_set_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
_cogl_texture_set_filters (child_tex, min_filter, mag_filter);
}
static void
_cogl_texture_pixmap_x11_pre_paint (CoglTexture *tex,
CoglTexturePrePaintFlags flags)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
_cogl_texture_pixmap_x11_update (tex_pixmap,
!!(flags & COGL_TEXTURE_NEEDS_MIPMAP));
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
_cogl_texture_pre_paint (child_tex, flags);
}
static void
_cogl_texture_pixmap_x11_ensure_non_quad_rendering (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
_cogl_texture_ensure_non_quad_rendering (child_tex);
}
static void
_cogl_texture_pixmap_x11_set_wrap_mode_parameters (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_p)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
_cogl_texture_set_wrap_mode_parameters (child_tex,
wrap_mode_s,
wrap_mode_t,
wrap_mode_p);
}
static CoglPixelFormat
_cogl_texture_pixmap_x11_get_format (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
return cogl_texture_get_format (child_tex);
}
static GLenum
_cogl_texture_pixmap_x11_get_gl_format (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglHandle child_tex;
child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
return _cogl_texture_get_gl_format (child_tex);
}
static int
_cogl_texture_pixmap_x11_get_width (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
return tex_pixmap->width;
}
static int
_cogl_texture_pixmap_x11_get_height (CoglTexture *tex)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
return tex_pixmap->height;
}
static void
_cogl_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap)
{
set_damage_object_internal (tex_pixmap, 0, 0);
if (tex_pixmap->image)
XDestroyImage (tex_pixmap->image);
if (tex_pixmap->shm_info.shmid != -1)
{
XShmDetach (_cogl_xlib_get_display (), &tex_pixmap->shm_info);
shmdt (tex_pixmap->shm_info.shmaddr);
shmctl (tex_pixmap->shm_info.shmid, IPC_RMID, 0);
}
if (tex_pixmap->tex)
cogl_handle_unref (tex_pixmap->tex);
#ifdef COGL_HAS_GLX_SUPPORT
_cogl_texture_pixmap_x11_free_glx_pixmap (tex_pixmap);
if (tex_pixmap->glx_tex)
cogl_handle_unref (tex_pixmap->glx_tex);
#endif
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_pixmap));
}
static const CoglTextureVtable
cogl_texture_pixmap_x11_vtable =
{
_cogl_texture_pixmap_x11_set_region,
_cogl_texture_pixmap_x11_get_data,
_cogl_texture_pixmap_x11_foreach_sub_texture_in_region,
_cogl_texture_pixmap_x11_get_max_waste,
_cogl_texture_pixmap_x11_is_sliced,
_cogl_texture_pixmap_x11_can_hardware_repeat,
_cogl_texture_pixmap_x11_transform_coords_to_gl,
_cogl_texture_pixmap_x11_transform_quad_coords_to_gl,
_cogl_texture_pixmap_x11_get_gl_texture,
_cogl_texture_pixmap_x11_set_filters,
_cogl_texture_pixmap_x11_pre_paint,
_cogl_texture_pixmap_x11_ensure_non_quad_rendering,
_cogl_texture_pixmap_x11_set_wrap_mode_parameters,
_cogl_texture_pixmap_x11_get_format,
_cogl_texture_pixmap_x11_get_gl_format,
_cogl_texture_pixmap_x11_get_width,
_cogl_texture_pixmap_x11_get_height,
NULL /* is_foreign */
};
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