Add support for a static Xinerama configuration to be specified

in xorg.conf. This static configuration will always be used and
any attempts to update it will be ignored.

Note that all xinerama aware apps that I have seen will not
sanity check the xinerama extents against the screen size, so
if the screen doesn't properly enclose the xinerama extents,
expect your apps to punish you accordingly.

1 files changed, 140 insertions, 17 deletions

diff --git a/src/vmware.c b/src/vmware.c
index c630d68..62abd2f 100644
--- a/src/vmware.c
+++ b/src/vmware.c
@@ -173,7 +173,7 @@ static const OptionInfoRec VMWAREOptions[] = {
     { OPTION_HW_CURSOR, "HWcursor",     OPTV_BOOLEAN,   {0},    FALSE },
     { OPTION_NOACCEL,   "NoAccel",      OPTV_BOOLEAN,   {0},    FALSE },
     { OPTION_XINERAMA,  "Xinerama",     OPTV_BOOLEAN,   {0},    FALSE },
-    { OPTION_STATIC_XINERAMA, "StaticXinerama", OPTV_BOOLEAN, {0}, FALSE },
+    { OPTION_STATIC_XINERAMA, "StaticXinerama", OPTV_STRING, {0}, FALSE },
     { -1,               NULL,           OPTV_NONE,      {0},    FALSE }
 };
 
@@ -424,6 +424,127 @@ VMWAREAvailableOptions(int chipid, int busid)
     return VMWAREOptions;
 }
 
+static xXineramaScreenInfo *
+VMWAREParseTopologyString(ScrnInfoPtr pScrn,
+                          const char *topology,     // IN:
+                          unsigned int *retNumOutputs) // OUT:
+{
+   xXineramaScreenInfo *extents = NULL;
+   unsigned int numOutputs = 0;
+   const char *str = topology;
+
+   xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Parsing static Xinerama topology: Starting...\n");
+
+   do {
+      char buf[10];
+      unsigned long x, y, width, height;
+      size_t i = 0;
+
+      for (i = 0; str[i] >= '0' && str[i] <= '9'; i++);
+      if (i == 0) {
+        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: unable to parse width.\n",
+                   numOutputs);
+        goto error;
+      }
+
+      strncpy(buf, str, i);
+      width = atoi(buf);
+
+      if (str[i] != 'x' && str[i] != 'X') {
+         xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+                    "Output %u: unexpected character '%c' after width.\n",
+                    numOutputs, str[i]);
+         goto error;
+      }
+
+      str += (i + 1);
+
+      for (i = 0; str[i] >= '0' && str[i] <= '9'; i++);
+      if (i == 0) {
+        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: unable to parse height.\n",
+                   numOutputs);
+        goto error;
+      }
+
+      strncpy(buf, str, i);
+      height = atoi(buf);
+
+      if (str[i] != '+') {
+         xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+                    "Output %u: unexpected character '%c' after height.\n",
+                    numOutputs, str[i]);
+         goto error;
+      }
+
+      str += (i + 1);
+
+      for (i = 0; str[i] >= '0' && str[i] <= '9'; i++);
+      if (i == 0) {
+        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: unable to parse X offset.\n",
+                   numOutputs);
+        goto error;
+      }
+
+      strncpy(buf, str, i);
+      x = atoi(buf);
+
+      if (str[i] != '+') {
+         xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+                    "Output %u: unexpected character '%c' after X offset.\n",
+                    numOutputs, str[i]);
+         goto error;
+      }
+
+      str += (i + 1);
+
+      for (i = 0; str[i] >= '0' && str[i] <= '9'; i++);
+      if (i == 0) {
+        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: unable to parse Y offset.\n",
+                   numOutputs);
+        goto error;
+      }
+
+      strncpy(buf, str, i);
+      y = atoi(buf);
+
+      if (str[i] == '\0') {
+         str += i;
+      } else if (str[i] != ';') {
+         xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+                    "Output %u: unexpected character '%c' after Y offset.\n",
+                    numOutputs, str[i]);
+         goto error;
+      } else {
+         str += (i + 1);
+      }
+
+      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: %hux%hu+%hu+%hu\n",
+                 numOutputs, width, height, x, y);
+
+      numOutputs++;
+      extents = xrealloc(extents, numOutputs * sizeof (xXineramaScreenInfo));
+      extents[numOutputs - 1].x_org = x;
+      extents[numOutputs - 1].y_org = y;
+      extents[numOutputs - 1].width = width;
+      extents[numOutputs - 1].height = height;
+   } while (*str != 0);
+
+   xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Parsing static Xinerama topology: Succeeded.\n");
+   goto exit;
+
+ error:
+   xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Parsing static Xinerama topology: Failed.\n");
+
+   xfree(extents);
+   extents = NULL;
+   numOutputs = 0;
+
+ exit:
+   *retNumOutputs = numOutputs;
+   return extents;
+}
+
+
 static Bool
 VMWAREPreInit(ScrnInfoPtr pScrn, int flags)
 {
@@ -759,7 +880,19 @@ VMWAREPreInit(ScrnInfoPtr pScrn, int flags)
                   "Xinerama is not safely supported by the current virtual hardware. "
                   "Do not request resolutions that require > 16MB of framebuffer.\n");
     }
-    pVMWARE->xineramaStatic = xf86ReturnOptValBool(options, OPTION_STATIC_XINERAMA, FALSE);
+
+
+    if (useXinerama && xf86IsOptionSet(options, OPTION_STATIC_XINERAMA)) {
+       char *topology = xf86GetOptValString(options, OPTION_STATIC_XINERAMA);
+       if (topology) {
+          pVMWARE->xineramaState =
+             VMWAREParseTopologyString(pScrn, topology, &pVMWARE->xineramaNumOutputs);
+
+         pVMWARE->xineramaStatic = pVMWARE->xineramaState != NULL;
+
+         xfree(topology);
+       }
+    }
 
     xfree(options);
 
@@ -842,19 +975,9 @@ VMWAREPreInit(ScrnInfoPtr pScrn, int flags)
     }
 
     if (pVMWARE->xinerama && pVMWARE->xineramaStatic) {
-#if 0
-      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Setting up static Xinerama topology.\n");
-      pVMWARE->xineramaState = (VMWAREXineramaPtr)xcalloc(pVMWARE->xineramaNumOutputs,
-                                                          sizeof (VMWAREXineramaRec));
-      if (!pVMWARE->xineramaState) {
-         xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
-                    "Failed to initialize VMware Xinerama state.\n");
-      } else {
-         /* XXX: Apply static xinerama topology from config file. */
-      }
-#else
-      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "\"StaticXinerama\" is not supported yet.\n");
-#endif
+       xf86DrvMsg(pScrn->scrnIndex, X_INFO, pVMWARE->xineramaState ?
+                                            "Using static Xinerama.\n" :
+                                            "Failed to configure static Xinerama.\n");
     }
 
     return TRUE;
@@ -1036,7 +1159,7 @@ VMWAREModeInit(ScrnInfoPtr pScrn, DisplayModePtr mode)
      */
     if (pVMWARE->xinerama && !pVMWARE->xineramaStatic) {
        if (pVMWARE->xineramaNextState) {
-          Xfree(pVMWARE->xineramaState);
+          xfree(pVMWARE->xineramaState);
           pVMWARE->xineramaState = pVMWARE->xineramaNextState;
           pVMWARE->xineramaNumOutputs = pVMWARE->xineramaNextNumOutputs;
 
@@ -1051,7 +1174,7 @@ VMWAREModeInit(ScrnInfoPtr pScrn, DisplayModePtr mode)
              basicState->width = vmwareReg->svga_reg_width;
              basicState->height = vmwareReg->svga_reg_height;
 
-             Xfree(pVMWARE->xineramaState);
+             xfree(pVMWARE->xineramaState);
              pVMWARE->xineramaState = basicState;
              pVMWARE->xineramaNumOutputs = 1;
           }