glx: Add functions and GLX plumbing for GLX_MESA_query_renderer

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/glx/Makefile.am

@@ -77,6 +77,7 @@ libglx_la_SOURCES = \
 	  indirect_vertex_program.c \
 	  pixel.c \
 	  pixelstore.c \
+	  query_renderer.c \
 	  render2.c \
 	  renderpix.c \
 	  single2.c \

src/glx/glxclient.h

@@ -474,7 +474,12 @@ struct glx_screen_vtable {
 						 unsigned num_attrib,
 						 const uint32_t *attribs,
 						 unsigned *error);
-
+   int (*query_renderer_integer)(struct glx_screen *psc,
+                                 int attribute,
+                                 int *value);
+   int (*query_renderer_string)(struct glx_screen *psc,
+                                int attribute,
+                                const char **value);
 };
 
 struct glx_screen

src/glx/glxcmds.c

@@ -2603,6 +2603,12 @@ static const struct name_address_pair GLX_functions[] = {
    /*** GLX_ARB_create_context and GLX_ARB_create_context_profile ***/
    GLX_FUNCTION(glXCreateContextAttribsARB),
 
+   /*** GLX_MESA_query_renderer ***/
+   GLX_FUNCTION(glXQueryRendererIntegerMESA),
+   GLX_FUNCTION(glXQueryRendererStringMESA),
+   GLX_FUNCTION(glXQueryCurrentRendererIntegerMESA),
+   GLX_FUNCTION(glXQueryCurrentRendererStringMESA),
+
    {NULL, NULL}                 /* end of list */
 };
 

src/glx/query_renderer.c

@@ -0,0 +1,173 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include "glxclient.h"
+#include "glx_error.h"
+
+#include <assert.h>
+
+static Bool
+__glXQueryRendererInteger(struct glx_screen *psc, int attribute,
+                          unsigned int *value)
+{
+   unsigned int values_for_query = 0;
+   int buffer[32];
+   int err;
+
+   /* This probably means the caller is trying to use an extension function
+    * that isn't actually supported.
+    */
+   if (psc->vtable->query_renderer_integer == NULL)
+      return False;
+
+   switch (attribute) {
+   case GLX_RENDERER_VENDOR_ID_MESA:
+   case GLX_RENDERER_DEVICE_ID_MESA:
+      values_for_query = 1;
+      break;
+   case GLX_RENDERER_VERSION_MESA:
+      values_for_query = 3;
+      break;
+   case GLX_RENDERER_ACCELERATED_MESA:
+   case GLX_RENDERER_VIDEO_MEMORY_MESA:
+   case GLX_RENDERER_UNIFIED_MEMORY_ARCHITECTURE_MESA:
+   case GLX_RENDERER_PREFERRED_PROFILE_MESA:
+      values_for_query = 1;
+      break;
+   case GLX_RENDERER_OPENGL_CORE_PROFILE_VERSION_MESA:
+   case GLX_RENDERER_OPENGL_COMPATIBILITY_PROFILE_VERSION_MESA:
+   case GLX_RENDERER_OPENGL_ES_PROFILE_VERSION_MESA:
+   case GLX_RENDERER_OPENGL_ES2_PROFILE_VERSION_MESA:
+      values_for_query = 2;
+      break;
+
+   default:
+      return False;
+   }
+
+   err = psc->vtable->query_renderer_integer(psc, attribute, buffer);
+
+   /* If there was no error, copy the correct number of values from the driver
+    * out to the application.
+    */
+   if (err == 0)
+      memcpy(value, buffer, sizeof(unsigned int) * values_for_query);
+
+   return err == 0;
+}
+
+_X_HIDDEN Bool
+glXQueryRendererIntegerMESA(Display *dpy, int screen,
+                            int renderer, int attribute,
+                            unsigned int *value)
+{
+   struct glx_screen *psc;
+
+   if (dpy == NULL)
+      return False;
+
+   /* This probably means the caller passed the wrong display pointer or
+    * screen number.
+    */
+   psc = GetGLXScreenConfigs(dpy, screen);
+   if (psc == NULL)
+      return False;
+
+   /* Right now only a single renderer per display / screen combination is
+    * supported.
+    */
+   if (renderer != 0)
+      return False;
+
+   return __glXQueryRendererInteger(psc, attribute, value);
+}
+
+_X_HIDDEN Bool
+glXQueryCurrentRendererIntegerMESA(int attribute, unsigned int *value)
+{
+   struct glx_context *gc = __glXGetCurrentContext();
+
+   if (gc == NULL)
+      return False;
+
+   return __glXQueryRendererInteger(gc->psc, attribute, value);
+}
+
+static const char *
+__glXQueryRendererString(struct glx_screen *psc, int attribute)
+{
+   const char *value;
+   int err;
+
+   /* This probably means the caller is trying to use an extension function
+    * that isn't actually supported.
+    */
+   if (psc->vtable->query_renderer_integer == NULL)
+      return NULL;
+
+   switch (attribute) {
+   case GLX_RENDERER_VENDOR_ID_MESA:
+   case GLX_RENDERER_DEVICE_ID_MESA:
+      break;
+   default:
+      return NULL;
+   }
+
+   err = psc->vtable->query_renderer_string(psc, attribute, &value);
+   return (err == 0) ? value : NULL;
+}
+
+_X_HIDDEN const char *
+glXQueryRendererStringMESA(Display *dpy, int screen,
+                           int renderer, int attribute)
+{
+   struct glx_screen *psc;
+
+   if (dpy == NULL)
+      return False;
+
+   /* This probably means the caller passed the wrong display pointer or
+    * screen number.
+    */
+   psc = GetGLXScreenConfigs(dpy, screen);
+   if (psc == NULL)
+      return False;
+
+   /* Right now only a single renderer per display / screen combination is
+    * supported.
+    */
+   if (renderer != 0)
+      return False;
+
+   return __glXQueryRendererString(psc, attribute);
+}
+
+_X_HIDDEN const char *
+glXQueryCurrentRendererStringMESA(int attribute)
+{
+   struct glx_context *gc = __glXGetCurrentContext();
+
+   if (gc == NULL)
+      return False;
+
+   return __glXQueryRendererString(gc->psc, attribute);
+}