initial check-in (post crash)

1 files changed, 201 insertions, 0 deletions

diff --git a/src/glut/glx/layerutil.c b/src/glut/glx/layerutil.c
new file mode 100644
index 0000000000..80ee19514f
--- /dev/null
+++ b/src/glut/glx/layerutil.c
@@ -0,0 +1,201 @@
+
+/* Copyright (c) Mark J. Kilgard, 1993, 1994. */
+
+/* This program is freely distributable without licensing fees
+   and is provided without guarantee or warrantee expressed or
+   implied. This program is -not- in the public domain. */
+
+/* Based on XLayerUtil.c: Revision: 1.5 */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "layerutil.h"
+
+/* SGI optimization introduced in IRIX 6.3 to avoid X server
+   round trips for interning common X atoms. */
+#include <X11/Xatom.h>
+#if defined(_SGI_EXTRA_PREDEFINES) && !defined(NO_FAST_ATOMS)
+#include <X11/SGIFastAtom.h>
+#else
+#define XSGIFastInternAtom(dpy,string,fast_name,how) XInternAtom(dpy,string,how)
+#endif
+
+static Bool layersRead = False;
+static OverlayInfo **overlayInfoPerScreen;
+static unsigned long *numOverlaysPerScreen;
+
+static void
+findServerOverlayVisualsInfo(Display * dpy)
+{
+  static Atom overlayVisualsAtom;
+  Atom actualType;
+  Status status;
+  unsigned long sizeData, bytesLeft;
+  Window root;
+  int actualFormat, numScreens, i;
+
+  if (layersRead == False) {
+    overlayVisualsAtom = XSGIFastInternAtom(dpy,
+      "SERVER_OVERLAY_VISUALS", SGI_XA_SERVER_OVERLAY_VISUALS, True);
+    if (overlayVisualsAtom != None) {
+      numScreens = ScreenCount(dpy);
+      overlayInfoPerScreen = (OverlayInfo **)
+        malloc(numScreens * sizeof(OverlayInfo *));
+      numOverlaysPerScreen = (unsigned long *)
+        malloc(numScreens * sizeof(unsigned long));
+      if (overlayInfoPerScreen != NULL &&
+        numOverlaysPerScreen != NULL) {
+        for (i = 0; i < numScreens; i++) {
+          root = RootWindow(dpy, i);
+          status = XGetWindowProperty(dpy, root,
+            overlayVisualsAtom, 0L, (long) 10000, False,
+            overlayVisualsAtom, &actualType, &actualFormat,
+            &sizeData, &bytesLeft,
+            (unsigned char **) &overlayInfoPerScreen[i]);
+          if (status != Success ||
+            actualType != overlayVisualsAtom ||
+            actualFormat != 32 || sizeData < 4)
+            numOverlaysPerScreen[i] = 0;
+          else
+            /* Four 32-bit quantities per
+               SERVER_OVERLAY_VISUALS entry. */
+            numOverlaysPerScreen[i] = sizeData / 4;
+        }
+        layersRead = True;
+      } else {
+        if (overlayInfoPerScreen != NULL)
+          free(overlayInfoPerScreen);
+        if (numOverlaysPerScreen != NULL)
+          free(numOverlaysPerScreen);
+      }
+    }
+  }
+}
+
+int
+__glutGetTransparentPixel(Display * dpy, XVisualInfo * vinfo)
+{
+  int i, screen = vinfo->screen;
+  OverlayInfo *overlayInfo;
+
+  findServerOverlayVisualsInfo(dpy);
+  if (layersRead) {
+    for (i = 0; i < numOverlaysPerScreen[screen]; i++) {
+      overlayInfo = &overlayInfoPerScreen[screen][i];
+      if (vinfo->visualid == overlayInfo->overlay_visual) {
+        if (overlayInfo->transparent_type == TransparentPixel) {
+          return (int) overlayInfo->value;
+        } else {
+          return -1;
+        }
+      }
+    }
+  }
+  return -1;
+}
+
+XLayerVisualInfo *
+__glutXGetLayerVisualInfo(Display * dpy, long lvinfo_mask,
+  XLayerVisualInfo * lvinfo_template, int *nitems_return)
+{
+  XVisualInfo *vinfo;
+  XLayerVisualInfo *layerInfo;
+  int numVisuals, count, i, j;
+
+  vinfo = XGetVisualInfo(dpy, lvinfo_mask & VisualAllMask,
+    &lvinfo_template->vinfo, nitems_return);
+  if (vinfo == NULL)
+    return NULL;
+  numVisuals = *nitems_return;
+  findServerOverlayVisualsInfo(dpy);
+  layerInfo = (XLayerVisualInfo *)
+    malloc(numVisuals * sizeof(XLayerVisualInfo));
+  if (layerInfo == NULL) {
+    XFree(vinfo);
+    return NULL;
+  }
+  count = 0;
+  for (i = 0; i < numVisuals; i++) {
+    XVisualInfo *pVinfo = &vinfo[i];
+    int screen = pVinfo->screen;
+    OverlayInfo *overlayInfo = NULL;
+
+    overlayInfo = NULL;
+    if (layersRead) {
+      for (j = 0; j < numOverlaysPerScreen[screen]; j++)
+        if (pVinfo->visualid ==
+          overlayInfoPerScreen[screen][j].overlay_visual) {
+          overlayInfo = &overlayInfoPerScreen[screen][j];
+          break;
+        }
+    }
+    if (lvinfo_mask & VisualLayerMask)
+      if (overlayInfo == NULL) {
+        if (lvinfo_template->layer != 0)
+          continue;
+      } else if (lvinfo_template->layer != overlayInfo->layer)
+        continue;
+    if (lvinfo_mask & VisualTransparentType)
+      if (overlayInfo == NULL) {
+        if (lvinfo_template->type != None)
+          continue;
+      } else if (lvinfo_template->type !=
+        overlayInfo->transparent_type)
+        continue;
+    if (lvinfo_mask & VisualTransparentValue)
+      if (overlayInfo == NULL)
+        /* Non-overlay visuals have no sense of
+           TransparentValue. */
+        continue;
+      else if (lvinfo_template->value != overlayInfo->value)
+        continue;
+    layerInfo[count].vinfo = *pVinfo;
+    if (overlayInfo == NULL) {
+      layerInfo[count].layer = 0;
+      layerInfo[count].type = None;
+      layerInfo[count].value = 0;  /* meaningless */
+    } else {
+      layerInfo[count].layer = overlayInfo->layer;
+      layerInfo[count].type = overlayInfo->transparent_type;
+      layerInfo[count].value = overlayInfo->value;
+    }
+    count++;
+  }
+  XFree(vinfo);
+  *nitems_return = count;
+  if (count == 0) {
+    XFree(layerInfo);
+    return NULL;
+  } else
+    return layerInfo;
+}
+
+#if 0                   /* Unused by GLUT. */
+Status
+__glutXMatchLayerVisualInfo(Display * dpy, int screen,
+  int depth, int visualClass, int layer,
+  XLayerVisualInfo * lvinfo_return)
+{
+  XLayerVisualInfo *lvinfo;
+  XLayerVisualInfo lvinfoTemplate;
+  int nitems;
+
+  lvinfoTemplate.vinfo.screen = screen;
+  lvinfoTemplate.vinfo.depth = depth;
+#if defined(__cplusplus) || defined(c_plusplus)
+  lvinfoTemplate.vinfo.c_class = visualClass;
+#else
+  lvinfoTemplate.vinfo.class = visualClass;
+#endif
+  lvinfoTemplate.layer = layer;
+  lvinfo = __glutXGetLayerVisualInfo(dpy,
+    VisualScreenMask | VisualDepthMask |
+    VisualClassMask | VisualLayerMask,
+    &lvinfoTemplate, &nitems);
+  if (lvinfo != NULL && nitems > 0) {
+    *lvinfo_return = *lvinfo;
+    return 1;
+  } else
+    return 0;
+}
+#endif