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-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Display.c128
1 files changed, 105 insertions, 23 deletions
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Display.c b/nx-X11/programs/Xserver/hw/nxagent/Display.c
index aa8ab26d1..382cdf3c1 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Display.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Display.c
@@ -2401,60 +2401,139 @@ static int nxagentCheckForDepthsCompatibility()
static int nxagentCheckForPixmapFormatsCompatibility()
{
- int i, j;
- int matched;
- int compatible;
+ /*
+ * Depending on the (reconnect) tolerance checks value, this
+ * function checks stricter or looser:
+ * - Strict means that the number of internal and external
+ * pixmap formats must match exactly and every
+ * internal pixmap format must be available in the
+ * external pixmap format array.
+ * - Safe means that the number of pixmap formats might
+ * diverge, but all internal pixmap formats must
+ * also be included in the external pixmap formats
+ * array. This is recommended, because it allows
+ * clients with more pixmap formats to still connect,
+ * but not lose functionality.
+ * - Risky means that the internal pixmap formats array is
+ * allowed to be smaller than the external pixmap
+ * formats array, but at least one pixmap format must
+ * be included in both. This is potentially unsafe.
+ * - Bypass or higher means that all of these checks are
+ * essentially deactivated. This is a very bad idea.
+ */
- compatible = 1;
+ const unsigned int tolerance = nxagentOption(ReconnectTolerance);
- if (nxagentNumPixmapFormats != nxagentRemoteNumPixmapFormats)
+ if (ToleranceChecksBypass <= tolerance)
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Not proceeding with any checks, "
+ "because tolerance [%u] higher than or equal [%u]. Number of internally available "
+ "pixmap formats is [%d], number of externally available pixmap formats is [%d].\n",
+ tolerance, ToleranceChecksBypass, nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats);
+ #endif
+
+ return 1;
+ }
+
+ if ((ToleranceChecksStrict == tolerance) && (nxagentNumPixmapFormats != nxagentRemoteNumPixmapFormats))
{
#ifdef DEBUG
- fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Number of internal pixmap formats [%d] "
- "doesn't match with remote formats [%d].\n", nxagentNumPixmapFormats,
- nxagentRemoteNumPixmapFormats);
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! No tolerance allowed and number "
+ "of internal pixmap formats [%d] doesn't match with number of remote formats [%d].\n",
+ nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats);
#endif
+
+ return 0;
}
- for (i = 0; i < nxagentNumPixmapFormats; i++)
+ if ((ToleranceChecksSafe == tolerance) && (nxagentNumPixmapFormats > nxagentRemoteNumPixmapFormats))
{
- matched = 0;
+ #ifdef DEBUG
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Tolerance [%u] too low "
+ "and number of internal pixmap formats [%d] higher than number of external formats [%d].\n",
+ tolerance, nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats);
+ #endif
+
+ return 0;
+ }
+
+ /*
+ * By now the tolerance is either:
+ * - Strict
+ * - Safe and:
+ * o the number of internal and external pixmap formats
+ * matches exactly, or
+ * o the number of external pixmap formats is higher than
+ * the number of internal pixmap formats,
+ * - Risky
+ */
+
+ bool compatible = true;
+ bool one_match = false;
+ bool matched = false;
+ int total_matches = 0;
- for (j = 0; j < nxagentRemoteNumPixmapFormats; j++)
+ for (int i = 0; i < nxagentNumPixmapFormats; ++i)
+ {
+ matched = false;
+
+ for (int j = 0; j < nxagentRemoteNumPixmapFormats; ++j)
{
if (nxagentPixmapFormats[i].depth == nxagentRemotePixmapFormats[j].depth &&
nxagentPixmapFormats[i].bits_per_pixel == nxagentRemotePixmapFormats[j].bits_per_pixel &&
nxagentPixmapFormats[i].scanline_pad == nxagentRemotePixmapFormats[j].scanline_pad)
{
- matched = 1;
+ matched = true;
+ one_match = true;
+ ++total_matches;
break;
}
}
- if (matched == 0)
+ if ((ToleranceChecksRisky > tolerance) && (!matched))
{
#ifdef WARNING
- fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Failed to match internal "
- "pixmap format depth [%d] bpp [%d] pad [%d].\n", nxagentPixmapFormats[i].depth,
- nxagentPixmapFormats[i].bits_per_pixel, nxagentPixmapFormats[i].scanline_pad);
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Tolerance [%u] too low "
+ "and failed to match internal pixmap format (depth [%d] bpp [%d] pad [%d]).\n",
+ tolerance, nxagentPixmapFormats[i].depth, nxagentPixmapFormats[i].bits_per_pixel,
+ nxagentPixmapFormats[i].scanline_pad);
#endif
- compatible = 0;
+ compatible = false;
}
}
- #ifdef TEST
+ int ret = !(!(compatible));
- if (compatible == 1)
+ if (compatible)
{
+ #ifdef TEST
fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: Internal pixmap formats match with "
- "remote pixmap formats.\n");
- }
+ "remote pixmap formats at tolerance [%u].\n", tolerance);
+ #endif
- #endif
+ if (total_matches != nxagentNumPixmapFormats)
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: Only some [%d] of the internal "
+ "pixmap formats [%d] match with external pixmap formats [%d] at tolerance [%u].\n",
+ total_matches, nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats, tolerance);
+ #endif
+ }
+ }
+ else
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Internally available "
+ "pixmap formats [%d] don't match with external pixmap formats [%d] "
+ "at tolerance [%u]. Only [%d] depth values matched.\n",
+ nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats, tolerance, total_matches);
+ #endif
+ }
- return compatible;
+ return (ret);
}
static int nxagentInitAndCheckVisuals(int flexibility)
@@ -2759,6 +2838,9 @@ Bool nxagentReconnectDisplay(void *p0)
* formats are supported.
*/
+ /*
+ * FIXME: add an actual check here (and pass check value through nxagentInitPixmapFormats().)
+ */
nxagentInitPixmapFormats();
reconnectDisplayState = GOT_PIXMAP_FORMAT_LIST;