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texture-pixmap-x11: Move GLX code to cogl-winsys-glx.c

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This moves the GLX specific code from cogl-texture-pixmap-x11.c into
cogl-winsys-glx.c. If we want the winsys components to by dynamically
loadable then we can't have GLX code scattered outside of
cogl-winsys-glx.c. This also sets us up for supporting the
EGL_texture_from_pixmap extension which is almost identical to the
GLX_texture_from_pixmap extension.
This commit is contained in:
Robert Bragg 2011-03-01 14:43:43 +00:00
parent d5d11f1878
commit d52e3f0cc2
5 changed files with 632 additions and 519 deletions
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15
cogl/winsys/cogl-texture-pixmap-x11-private.h
View File

@ -36,6 +36,7 @@
#include "cogl-handle.h"
#include "cogl-texture-private.h"
#include "cogl-texture-pixmap-x11.h"
#define COGL_TEXTURE_PIXMAP_X11(tex) ((CoglTexturePixmapX11 *) tex)
@ -72,18 +73,12 @@ struct _CoglTexturePixmapX11
gboolean damage_owned;
CoglDamageRectangle damage_rect;
#ifdef COGL_HAS_GLX_SUPPORT
void *winsys;
/* During the pre_paint method, this will be set to TRUE if we
should use the GLX texture, otherwise we will use the regular
should use the winsys texture, otherwise we will use the regular
texture */
gboolean use_glx_texture;
CoglHandle glx_tex;
GLXPixmap glx_pixmap;
gboolean glx_pixmap_has_mipmap;
gboolean glx_can_mipmap;
gboolean bind_tex_image_queued;
gboolean pixmap_bound;
#endif
gboolean use_winsys_texture;
};
GQuark

526
cogl/winsys/cogl-texture-pixmap-x11.c
View File

@ -23,6 +23,7 @@
* Authors:
* Neil Roberts <neil@linux.intel.com>
* Johan Bilien <johan.bilien@nokia.com>
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
@ -42,11 +43,7 @@
#include "cogl-texture-rectangle-private.h"
#include "cogl-context-private.h"
#include "cogl-handle.h"
#if COGL_HAS_GLX_SUPPORT
#include "cogl-display-glx-private.h"
#include "cogl-renderer-private.h"
#include "cogl-renderer-glx-private.h"
#endif
#include "cogl-winsys-private.h"
#include "cogl-pipeline-opengl-private.h"
#include <X11/Xlib.h>
@ -198,9 +195,7 @@ process_damage_event (CoglTexturePixmapX11 *tex_pixmap,
/* 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
_cogl_winsys_texture_pixmap_x11_damage_notify (tex_pixmap);
}
static CoglFilterReturn
@ -224,283 +219,6 @@ _cogl_texture_pixmap_x11_filter (void *native_event, void *data)
return COGL_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;
CoglDisplayGLX *glx_display;
_COGL_GET_CONTEXT (ctxt, FALSE);
glx_display = ctxt->display->winsys;
/* Check if we've already got a cached config for this depth */
for (i = 0; i < COGL_GLX_N_CACHED_CONFIGS; i++)
if (glx_display->glx_cached_configs[i].depth == -1)
spare_cache_slot = i;
else if (glx_display->glx_cached_configs[i].depth == depth)
{
*fbconfig_ret = glx_display->glx_cached_configs[i].fb_config;
*can_mipmap_ret = glx_display->glx_cached_configs[i].can_mipmap;
return glx_display->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);
glx_display->glx_cached_configs[spare_cache_slot].depth = depth;
glx_display->glx_cached_configs[spare_cache_slot].found = found;
glx_display->glx_cached_configs[spare_cache_slot].fb_config = *fbconfig_ret;
glx_display->glx_cached_configs[spare_cache_slot].can_mipmap = mipmap;
return found;
}
static gboolean
should_use_rectangle (void)
{
_COGL_GET_CONTEXT (ctxt, FALSE);
if (ctxt->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->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->rectangle_state =
COGL_WINSYS_RECTANGLE_STATE_ENABLE;
else if (g_ascii_strcasecmp (rect_env, "disable") == 0)
ctxt->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->rectangle_state = COGL_WINSYS_RECTANGLE_STATE_DISABLE;
}
return ctxt->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 (!_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_TEXTURE_FROM_PIXMAP))
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,
@ -589,13 +307,7 @@ cogl_texture_pixmap_x11_new (guint32 pixmap,
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
_cogl_winsys_texture_pixmap_x11_create (tex_pixmap);
return _cogl_texture_pixmap_x11_handle_new (tex_pixmap);
}
@ -686,9 +398,7 @@ cogl_texture_pixmap_x11_update_area (CoglHandle handle,
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_winsys_texture_pixmap_x11_damage_notify (tex_pixmap);
cogl_damage_rectangle_union (&tex_pixmap->damage_rect,
x, y, width, height);
@ -702,11 +412,7 @@ cogl_texture_pixmap_x11_is_using_tfp_extension (CoglHandle 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
return !!tex_pixmap->winsys;
}
void
@ -890,225 +596,37 @@ _cogl_texture_pixmap_x11_update_image_texture (CoglTexturePixmapX11 *tex_pixmap)
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)
{
CoglXlibTrapState trap_state;
CoglRendererGLX *glx_renderer;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
glx_renderer = ctx->display->renderer->winsys;
if (tex_pixmap->pixmap_bound)
glx_renderer->pf_glXReleaseTexImage (cogl_xlib_get_display (),
tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT);
/* FIXME - we need to trap errors and synchronize here because
* of ordering issues between the XPixmap destruction and the
* GLXPixmap destruction.
*
* If the X pixmap is destroyed, the GLX pixmap is destroyed as
* well immediately, and thus, when Cogl calls glXDestroyPixmap()
* it'll cause a BadDrawable error.
*
* this is technically a bug in the X server, which should not
* destroy either pixmaps until the call to glXDestroyPixmap(); so
* at some point we should revisit this code and remove the
* trap+sync after verifying that the destruction is indeed safe.
*
* for reference, see:
* http://bugzilla.clutter-project.org/show_bug.cgi?id=2324
*/
_cogl_xlib_trap_errors (&trap_state);
glXDestroyPixmap (cogl_xlib_get_display (), tex_pixmap->glx_pixmap);
XSync (cogl_xlib_get_display (), False);
_cogl_xlib_untrap_errors (&trap_state);
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;
CoglRendererGLX *glx_renderer;
_COGL_GET_CONTEXT (ctx, FALSE);
glx_renderer = ctx->display->renderer->winsys;
/* 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)
glx_renderer->pf_glXReleaseTexImage (cogl_xlib_get_display (),
tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT);
glx_renderer->pf_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,
_cogl_texture_pixmap_x11_set_use_winsys_texture (CoglTexturePixmapX11 *tex_pixmap,
gboolean new_value)
{
if (tex_pixmap->use_glx_texture != new_value)
if (tex_pixmap->use_winsys_texture != new_value)
{
/* Notify cogl-pipeline.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_pipeline_texture_storage_change_notify (tex_pixmap);
tex_pixmap->use_glx_texture = new_value;
tex_pixmap->use_winsys_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))
if (tex_pixmap->winsys)
{
_cogl_texture_pixmap_x11_set_use_glx_texture (tex_pixmap, TRUE);
if (_cogl_winsys_texture_pixmap_x11_update (tex_pixmap, needs_mipmap))
{
_cogl_texture_pixmap_x11_set_use_winsys_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_set_use_winsys_texture (tex_pixmap, FALSE);
_cogl_texture_pixmap_x11_update_image_texture (tex_pixmap);
}
@ -1130,11 +648,9 @@ _cogl_texture_pixmap_x11_get_texture (CoglTexturePixmapX11 *tex_pixmap)
for (i = 0; i < 2; i++)
{
#ifdef COGL_HAS_GLX_SUPPORT
if (tex_pixmap->use_glx_texture)
tex = tex_pixmap->glx_tex;
if (tex_pixmap->use_winsys_texture)
tex = _cogl_winsys_texture_pixmap_x11_get_texture (tex_pixmap);
else
#endif
tex = tex_pixmap->tex;
if (tex)
@ -1395,12 +911,8 @@ _cogl_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap)
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
if (tex_pixmap->winsys)
_cogl_winsys_texture_pixmap_x11_free (tex_pixmap);
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_pixmap));

35
cogl/winsys/cogl-winsys-egl.c
View File

@ -1079,3 +1079,38 @@ _cogl_winsys_context_egl_get_egl_display (CoglContext *context)
return egl_renderer->edpy;
}
#ifdef COGL_HAS_EGL_PLATFORM_POWERVR_X11_SUPPORT
gboolean
_cogl_winsys_texture_pixmap_x11_create (CoglTexturePixmapX11 *tex_pixmap)
{
/* Unsupported feature */
tex_pixmap->winsys = NULL;
return FALSE;
}
void
_cogl_winsys_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap)
{
/* Unsupported feature */
}
gboolean
_cogl_winsys_texture_pixmap_x11_update (CoglTexturePixmapX11 *tex_pixmap,
gboolean needs_mipmap)
{
/* Unsupported feature */
}
void
_cogl_winsys_texture_pixmap_x11_damage_notify (CoglTexturePixmapX11 *tex_pixmap)
{
/* Unsupported feature */
}
CoglHandle
_cogl_winsys_texture_pixmap_x11_get_texture (CoglTexturePixmapX11 *tex_pixmap)
{
/* Unsupported feature */
}
#endif

549
cogl/winsys/cogl-winsys-glx.c
View File

@ -41,6 +41,9 @@
#include "cogl-display-xlib-private.h"
#include "cogl-display-glx-private.h"
#include "cogl-private.h"
#include "cogl-texture-2d-private.h"
#include "cogl-texture-rectangle-private.h"
#include "cogl-pipeline-opengl-private.h"
#include <stdlib.h>
#include <sys/types.h>
@ -87,6 +90,17 @@ typedef struct _CoglSwapBuffersNotifyEntry
unsigned int id;
} CoglSwapBuffersNotifyEntry;
typedef struct _CoglTexturePixmapGLX
{
GLXPixmap glx_pixmap;
gboolean has_mipmap_space;
gboolean can_mipmap;
CoglHandle glx_tex;
gboolean bind_tex_image_queued;
gboolean pixmap_bound;
} CoglTexturePixmapGLX;
/* Define a set of arrays containing the functions required from GL
for each winsys feature */
@ -1327,3 +1341,538 @@ _cogl_winsys_xlib_get_visual_info (void)
return glXGetVisualFromFBConfig (xlib_renderer->xdpy, glx_display->fbconfig);
}
static gboolean
get_fbconfig_for_depth (CoglContext *context,
unsigned int depth,
GLXFBConfig *fbconfig_ret,
gboolean *can_mipmap_ret)
{
CoglRendererXlib *xlib_renderer;
CoglDisplayGLX *glx_display;
Display *dpy;
GLXFBConfig *fbconfigs;
int n_elements, i;
int db, stencil, alpha, mipmap, rgba, value;
int spare_cache_slot = 0;
gboolean found = FALSE;
xlib_renderer = context->display->renderer->winsys;
glx_display = context->display->winsys;
/* Check if we've already got a cached config for this depth */
for (i = 0; i < COGL_GLX_N_CACHED_CONFIGS; i++)
if (glx_display->glx_cached_configs[i].depth == -1)
spare_cache_slot = i;
else if (glx_display->glx_cached_configs[i].depth == depth)
{
*fbconfig_ret = glx_display->glx_cached_configs[i].fb_config;
*can_mipmap_ret = glx_display->glx_cached_configs[i].can_mipmap;
return glx_display->glx_cached_configs[i].found;
}
dpy = xlib_renderer->xdpy;
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);
glx_display->glx_cached_configs[spare_cache_slot].depth = depth;
glx_display->glx_cached_configs[spare_cache_slot].found = found;
glx_display->glx_cached_configs[spare_cache_slot].fb_config = *fbconfig_ret;
glx_display->glx_cached_configs[spare_cache_slot].can_mipmap = mipmap;
return found;
}
static gboolean
should_use_rectangle (CoglContext *context)
{
if (context->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 */
context->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)
context->rectangle_state =
COGL_WINSYS_RECTANGLE_STATE_ENABLE;
else if (g_ascii_strcasecmp (rect_env, "disable") == 0)
context->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
context->rectangle_state = COGL_WINSYS_RECTANGLE_STATE_DISABLE;
}
return context->rectangle_state == COGL_WINSYS_RECTANGLE_STATE_ENABLE;
}
static gboolean
try_create_glx_pixmap (CoglContext *context,
CoglTexturePixmapX11 *tex_pixmap,
gboolean mipmap)
{
CoglTexturePixmapGLX *glx_tex_pixmap = tex_pixmap->winsys;
CoglRenderer *renderer;
CoglRendererXlib *xlib_renderer;
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;
renderer = context->display->renderer;
xlib_renderer = renderer->winsys;
dpy = xlib_renderer->xdpy;
if (!get_fbconfig_for_depth (context,
tex_pixmap->depth, &fb_config,
&glx_tex_pixmap->can_mipmap))
{
COGL_NOTE (TEXTURE_PIXMAP, "No suitable FBConfig found for depth %i",
tex_pixmap->depth);
return FALSE;
}
if (should_use_rectangle (context))
{
target = GLX_TEXTURE_RECTANGLE_EXT;
glx_tex_pixmap->can_mipmap = FALSE;
}
else
target = GLX_TEXTURE_2D_EXT;
if (!glx_tex_pixmap->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 FALSE;
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_renderer_xlib_trap_errors (renderer, &trap_state);
glx_tex_pixmap->glx_pixmap = glXCreatePixmap (dpy,
fb_config,
tex_pixmap->pixmap,
attribs);
glx_tex_pixmap->has_mipmap_space = mipmap;
XSync (dpy, False);
if (_cogl_renderer_xlib_untrap_errors (renderer, &trap_state))
{
COGL_NOTE (TEXTURE_PIXMAP, "Failed to create pixmap for %p", tex_pixmap);
_cogl_renderer_xlib_trap_errors (renderer, &trap_state);
glXDestroyPixmap (dpy, glx_tex_pixmap->glx_pixmap);
XSync (dpy, False);
_cogl_renderer_xlib_untrap_errors (renderer, &trap_state);
glx_tex_pixmap->glx_pixmap = None;
return FALSE;
}
return TRUE;
}
gboolean
_cogl_winsys_texture_pixmap_x11_create (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapGLX *glx_tex_pixmap;
/* FIXME: It should be possible to get to a CoglContext from any
* CoglTexture pointer. */
_COGL_GET_CONTEXT (ctx, FALSE);
if (!_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_TEXTURE_FROM_PIXMAP))
{
tex_pixmap->winsys = NULL;
return FALSE;
}
glx_tex_pixmap = g_new0 (CoglTexturePixmapGLX, 1);
glx_tex_pixmap->glx_pixmap = None;
glx_tex_pixmap->can_mipmap = FALSE;
glx_tex_pixmap->has_mipmap_space = FALSE;
glx_tex_pixmap->glx_tex = COGL_INVALID_HANDLE;
glx_tex_pixmap->bind_tex_image_queued = TRUE;
glx_tex_pixmap->pixmap_bound = FALSE;
tex_pixmap->winsys = glx_tex_pixmap;
if (!try_create_glx_pixmap (ctx, tex_pixmap, FALSE))
{
tex_pixmap->winsys = NULL;
g_free (glx_tex_pixmap);
return FALSE;
}
return TRUE;
}
static void
free_glx_pixmap (CoglContext *context,
CoglTexturePixmapGLX *glx_tex_pixmap)
{
CoglXlibTrapState trap_state;
CoglRenderer *renderer;
CoglRendererXlib *xlib_renderer;
CoglRendererGLX *glx_renderer;
renderer = context->display->renderer;
xlib_renderer = renderer->winsys;
glx_renderer = renderer->winsys;
if (glx_tex_pixmap->pixmap_bound)
glx_renderer->pf_glXReleaseTexImage (xlib_renderer->xdpy,
glx_tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT);
/* FIXME - we need to trap errors and synchronize here because
* of ordering issues between the XPixmap destruction and the
* GLXPixmap destruction.
*
* If the X pixmap is destroyed, the GLX pixmap is destroyed as
* well immediately, and thus, when Cogl calls glXDestroyPixmap()
* it'll cause a BadDrawable error.
*
* this is technically a bug in the X server, which should not
* destroy either pixmaps until the call to glXDestroyPixmap(); so
* at some point we should revisit this code and remove the
* trap+sync after verifying that the destruction is indeed safe.
*
* for reference, see:
* http://bugzilla.clutter-project.org/show_bug.cgi?id=2324
*/
_cogl_renderer_xlib_trap_errors (renderer, &trap_state);
glXDestroyPixmap (xlib_renderer->xdpy, glx_tex_pixmap->glx_pixmap);
XSync (xlib_renderer->xdpy, False);
_cogl_renderer_xlib_untrap_errors (renderer, &trap_state);
glx_tex_pixmap->glx_pixmap = None;
glx_tex_pixmap->pixmap_bound = FALSE;
}
void
_cogl_winsys_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapGLX *glx_tex_pixmap;
/* FIXME: It should be possible to get to a CoglContext from any
* CoglTexture pointer. */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!tex_pixmap->winsys)
return;
glx_tex_pixmap = tex_pixmap->winsys;
free_glx_pixmap (ctx, glx_tex_pixmap);
if (glx_tex_pixmap->glx_tex)
cogl_handle_unref (glx_tex_pixmap->glx_tex);
tex_pixmap->winsys = NULL;
g_free (glx_tex_pixmap);
}
gboolean
_cogl_winsys_texture_pixmap_x11_update (CoglTexturePixmapX11 *tex_pixmap,
gboolean needs_mipmap)
{
CoglTexturePixmapGLX *glx_tex_pixmap = tex_pixmap->winsys;
CoglRendererGLX *glx_renderer;
/* FIXME: It should be possible to get to a CoglContext from any CoglTexture
* pointer. */
_COGL_GET_CONTEXT (ctx, FALSE);
/* If we don't have a GLX pixmap then fallback */
if (glx_tex_pixmap->glx_pixmap == None)
return FALSE;
glx_renderer = ctx->display->renderer->winsys;
/* Lazily create a texture to hold the pixmap */
if (glx_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 (ctx))
{
glx_tex_pixmap->glx_tex =
_cogl_texture_rectangle_new_with_size (tex_pixmap->width,
tex_pixmap->height,
COGL_TEXTURE_NO_ATLAS,
texture_format);
if (glx_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);
free_glx_pixmap (ctx, glx_tex_pixmap);
return FALSE;
}
}
else
{
glx_tex_pixmap->glx_tex =
_cogl_texture_2d_new_with_size (tex_pixmap->width,
tex_pixmap->height,
COGL_TEXTURE_NO_ATLAS,
texture_format);
if (glx_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);
free_glx_pixmap (ctx, glx_tex_pixmap);
return FALSE;
}
}
}
if (needs_mipmap)
{
/* If we can't support mipmapping then temporarily fallback */
if (!glx_tex_pixmap->can_mipmap)
return FALSE;
/* Recreate the GLXPixmap if it wasn't previously created with a
* mipmap tree */
if (!glx_tex_pixmap->has_mipmap_space)
{
free_glx_pixmap (ctx, glx_tex_pixmap);
COGL_NOTE (TEXTURE_PIXMAP, "Recreating GLXPixmap with mipmap "
"support for %p", tex_pixmap);
if (!try_create_glx_pixmap (ctx, tex_pixmap, TRUE))
{
/* If the pixmap failed then we'll permanently fallback
* to using XImage. This shouldn't happen. */
COGL_NOTE (TEXTURE_PIXMAP, "Falling back to XGetImage "
"updates for %p because creating the GLXPixmap "
"with mipmap support failed", tex_pixmap);
if (glx_tex_pixmap->glx_tex)
cogl_handle_unref (glx_tex_pixmap->glx_tex);
return FALSE;
}
glx_tex_pixmap->bind_tex_image_queued = TRUE;
}
}
if (glx_tex_pixmap->bind_tex_image_queued)
{
GLuint gl_handle, gl_target;
CoglRendererXlib *xlib_renderer = ctx->display->renderer->winsys;
cogl_texture_get_gl_texture (glx_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 (glx_tex_pixmap->pixmap_bound)
glx_renderer->pf_glXReleaseTexImage (xlib_renderer->xdpy,
glx_tex_pixmap->glx_pixmap,
GLX_FRONT_LEFT_EXT);
glx_renderer->pf_glXBindTexImage (xlib_renderer->xdpy,
glx_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 */
glx_tex_pixmap->bind_tex_image_queued = FALSE;
glx_tex_pixmap->pixmap_bound = TRUE;
_cogl_texture_2d_externally_modified (glx_tex_pixmap->glx_tex);
}
return TRUE;
}
void
_cogl_winsys_texture_pixmap_x11_damage_notify (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapGLX *glx_tex_pixmap = tex_pixmap->winsys;
glx_tex_pixmap->bind_tex_image_queued = TRUE;
}
CoglHandle
_cogl_winsys_texture_pixmap_x11_get_texture (CoglTexturePixmapX11 *tex_pixmap)
{
CoglTexturePixmapGLX *glx_tex_pixmap = tex_pixmap->winsys;
return glx_tex_pixmap->glx_tex;
}

22
cogl/winsys/cogl-winsys-private.h
View File

@ -25,6 +25,9 @@
#define __COGL_WINSYS_PRIVATE_H
#include "cogl-framebuffer-private.h"
#ifdef COGL_HAS_XLIB_SUPPORT
#include "cogl-texture-pixmap-x11-private.h"
#endif
#ifdef COGL_HAS_XLIB_SUPPORT
#include <X11/Xutil.h>
@ -120,4 +123,23 @@ void
_cogl_winsys_onscreen_remove_swap_buffers_callback (CoglOnscreen *onscreen,
unsigned int id);
#ifdef COGL_HAS_XLIB_SUPPORT
gboolean
_cogl_winsys_texture_pixmap_x11_create (CoglTexturePixmapX11 *tex_pixmap);
void
_cogl_winsys_texture_pixmap_x11_free (CoglTexturePixmapX11 *tex_pixmap);
gboolean
_cogl_winsys_texture_pixmap_x11_update (CoglTexturePixmapX11 *tex_pixmap,
gboolean needs_mipmap);
void
_cogl_winsys_texture_pixmap_x11_damage_notify (
CoglTexturePixmapX11 *tex_pixmap);
CoglHandle
_cogl_winsys_texture_pixmap_x11_get_texture (CoglTexturePixmapX11 *tex_pixmap);
#endif
#endif /* __COGL_WINSYS_PRIVATE_H */