st/egl: Add support for !GLX_DIRECT_RENDERING.

st/egl uses GLX code for DRI2 support.  It should honor
GLX_DIRECT_RENDERING.

Also updates configure.ac to define GLX_DIRECT_RENDERING for st/egl.
(cherry picked from commit cf588ab3f1)

configure.ac

@@ -699,7 +699,7 @@ AC_SUBST([DRI_DRIVER_SEARCH_DIR])
 dnl Direct rendering or just indirect rendering
 AC_ARG_ENABLE([driglx-direct],
     [AS_HELP_STRING([--disable-driglx-direct],
-        [enable direct rendering in GLX for DRI @<:@default=enabled@:>@])],
+        [enable direct rendering in GLX and EGL for DRI @<:@default=enabled@:>@])],
     [driglx_direct="$enableval"],
     [driglx_direct="yes"])
 dnl Which drivers to build - default is chosen by platform
@@ -1216,6 +1216,10 @@ yes)
             if test "x$enable_egl" != xyes; then
                 AC_MSG_ERROR([cannot build egl state tracker without EGL library])
             fi
+            # define GLX_DIRECT_RENDERING even when the driver is not dri
+            if test "x$mesa_driver" != xdri -a "x$driglx_direct" = xyes; then
+                DEFINES="$DEFINES -DGLX_DIRECT_RENDERING"
+            fi
             ;;
         xorg)
             PKG_CHECK_MODULES([LIBDRM_XORG], [libdrm >= $LIBDRM_XORG_REQUIRED])

src/gallium/state_trackers/egl/x11/glxinit.c

@@ -16,6 +16,8 @@
 
 #include "glxinit.h"
 
+#ifdef GLX_DIRECT_RENDERING
+
 typedef struct GLXGenericGetString
 {
    CARD8 reqType;
@@ -680,3 +682,5 @@ __glXInitialize(Display * dpy)
 
    return dpyPriv;
 }
+
+#endif /* GLX_DIRECT_RENDERING */

src/gallium/state_trackers/egl/x11/native_dri2.c

@@ -37,6 +37,8 @@
 #include "native_x11.h"
 #include "x11_screen.h"
 
+#ifdef GLX_DIRECT_RENDERING
+
 enum dri2_surface_type {
    DRI2_SURFACE_TYPE_WINDOW,
    DRI2_SURFACE_TYPE_PIXMAP,
@@ -878,3 +880,15 @@ x11_create_dri2_display(EGLNativeDisplayType dpy,
 
    return &dri2dpy->base;
 }
+
+#else /* GLX_DIRECT_RENDERING */
+
+struct native_display *
+x11_create_dri2_display(EGLNativeDisplayType dpy,
+                        struct native_event_handler *event_handler,
+                        struct drm_api *api)
+{
+   return NULL;
+}
+
+#endif /* GLX_DIRECT_RENDERING */

src/gallium/state_trackers/egl/x11/native_x11.c

@@ -70,7 +70,9 @@ native_create_probe(EGLNativeDisplayType dpy)
    xscr = x11_screen_create(xdpy, scr);
    if (xscr) {
       if (x11_screen_support(xscr, X11_SCREEN_EXTENSION_DRI2)) {
+#ifdef GLX_DIRECT_RENDERING
          driver_name = x11_screen_probe_dri2(xscr, NULL, NULL);
+#endif
          if (driver_name)
             nprobe->data = strdup(driver_name);
       }

src/gallium/state_trackers/egl/x11/x11_screen.c

@@ -39,8 +39,10 @@
 #include "glxinit.h"
 
 struct x11_screen {
+#ifdef GLX_DIRECT_RENDERING
    /* dummy base class */
    struct __GLXDRIdisplayRec base;
+#endif
 
    Display *dpy;
    int number;
@@ -103,15 +105,19 @@ x11_screen_destroy(struct x11_screen *xscr)
    if (xscr->dri_device)
       Xfree(xscr->dri_device);
 
+#ifdef GLX_DIRECT_RENDERING
    /* xscr->glx_dpy will be destroyed with the X display */
    if (xscr->glx_dpy)
       xscr->glx_dpy->dri2Display = NULL;
+#endif
 
    if (xscr->visuals)
       XFree(xscr->visuals);
    free(xscr);
 }
 
+#ifdef GLX_DIRECT_RENDERING
+
 static boolean
 x11_screen_init_dri2(struct x11_screen *xscr)
 {
@@ -133,6 +139,8 @@ x11_screen_init_glx(struct x11_screen *xscr)
    return (xscr->glx_dpy != NULL);
 }
 
+#endif /* GLX_DIRECT_RENDERING */
+
 /**
  * Return true if the screen supports the extension.
  */
@@ -145,12 +153,14 @@ x11_screen_support(struct x11_screen *xscr, enum x11_screen_extension ext)
    case X11_SCREEN_EXTENSION_XSHM:
       supported = XShmQueryExtension(xscr->dpy);
       break;
+#ifdef GLX_DIRECT_RENDERING
    case X11_SCREEN_EXTENSION_GLX:
       supported = x11_screen_init_glx(xscr);
       break;
    case X11_SCREEN_EXTENSION_DRI2:
       supported = x11_screen_init_dri2(xscr);
       break;
+#endif
    default:
       break;
    }
@@ -233,6 +243,39 @@ x11_screen_convert_visual(struct x11_screen *xscr, const XVisualInfo *visual,
    mode->xRenderable = TRUE;
 }
 
+/**
+ * Return the depth of a drawable.
+ *
+ * Unlike other drawable functions, the drawable needs not be a DRI2 drawable.
+ */
+uint
+x11_drawable_get_depth(struct x11_screen *xscr, Drawable drawable)
+{
+   unsigned int depth;
+
+   if (drawable != xscr->last_drawable) {
+      Window root;
+      int x, y;
+      unsigned int w, h, border;
+      Status ok;
+
+      ok = XGetGeometry(xscr->dpy, drawable, &root,
+            &x, &y, &w, &h, &border, &depth);
+      if (!ok)
+         depth = 0;
+
+      xscr->last_drawable = drawable;
+      xscr->last_depth = depth;
+   }
+   else {
+      depth = xscr->last_depth;
+   }
+
+   return depth;
+}
+
+#ifdef GLX_DIRECT_RENDERING
+
 /**
  * Return the GLX fbconfigs.
  */
@@ -391,37 +434,6 @@ x11_drawable_get_buffers(struct x11_screen *xscr, Drawable drawable,
    return (struct x11_drawable_buffer *) dri2bufs;
 }
 
-/**
- * Return the depth of a drawable.
- *
- * Unlike other drawable functions, the drawable needs not be a DRI2 drawable.
- */
-uint
-x11_drawable_get_depth(struct x11_screen *xscr, Drawable drawable)
-{
-   unsigned int depth;
-
-   if (drawable != xscr->last_drawable) {
-      Window root;
-      int x, y;
-      unsigned int w, h, border;
-      Status ok;
-
-      ok = XGetGeometry(xscr->dpy, drawable, &root,
-            &x, &y, &w, &h, &border, &depth);
-      if (!ok)
-         depth = 0;
-
-      xscr->last_drawable = drawable;
-      xscr->last_depth = depth;
-   }
-   else {
-      depth = xscr->last_depth;
-   }
-
-   return depth;
-}
-
 /**
  * Create a mode list of the given size.
  */
@@ -489,3 +501,5 @@ dri2InvalidateBuffers(Display *dpy, XID drawable)
 
    xscr->dri_invalidate_buffers(xscr, drawable, xscr->dri_user_data);
 }
+
+#endif /* GLX_DIRECT_RENDERING */

src/gallium/state_trackers/egl/x11/x11_screen.h

@@ -68,20 +68,18 @@ void
 x11_screen_convert_visual(struct x11_screen *xscr, const XVisualInfo *visual,
                           __GLcontextModes *mode);
 
+uint
+x11_drawable_get_depth(struct x11_screen *xscr, Drawable drawable);
+
+#ifdef GLX_DIRECT_RENDERING
+
+/* GLX */
 const __GLcontextModes *
 x11_screen_get_glx_configs(struct x11_screen *xscr);
 
 const __GLcontextModes *
 x11_screen_get_glx_visuals(struct x11_screen *xscr);
 
-const char *
-x11_screen_probe_dri2(struct x11_screen *xscr, int *major, int *minor);
-
-int
-x11_screen_enable_dri2(struct x11_screen *xscr,
-                       x11_drawable_invalidate_buffers invalidate_buffers,
-                       void *user_data);
-
 __GLcontextModes *
 x11_context_modes_create(unsigned count);
 
@@ -91,6 +89,15 @@ x11_context_modes_destroy(__GLcontextModes *modes);
 unsigned
 x11_context_modes_count(const __GLcontextModes *modes);
 
+/* DRI2 */
+const char *
+x11_screen_probe_dri2(struct x11_screen *xscr, int *major, int *minor);
+
+int
+x11_screen_enable_dri2(struct x11_screen *xscr,
+                       x11_drawable_invalidate_buffers invalidate_buffers,
+                       void *user_data);
+
 void
 x11_drawable_enable_dri2(struct x11_screen *xscr,
                          Drawable drawable, boolean on);
@@ -105,7 +112,6 @@ x11_drawable_get_buffers(struct x11_screen *xscr, Drawable drawable,
                          int *width, int *height, unsigned int *attachments,
                          boolean with_format, int num_ins, int *num_outs);
 
-uint
-x11_drawable_get_depth(struct x11_screen *xscr, Drawable drawable);
+#endif /* GLX_DIRECT_RENDERING */
 
 #endif /* _X11_SCREEN_H_ */