X-Git-Url: https://git.cworth.org/git?p=fips;a=blobdiff_plain;f=context.c;h=6bc3e0af7365e0ec104073a146ba5b2e6b78d5fb;hp=133c37c168d6b04016579cbf3ccbd3938f11e241;hb=ba91fa6199a75aea42e40221489d259f1f723e4e;hpb=c27d7ce0b3ce5a2b9b753a654fdebcc1627aae52

diff --git a/context.c b/context.c
index 133c37c..6bc3e0a 100644
--- a/context.c
+++ b/context.c
@@ -28,12 +28,18 @@ typedef struct context
 	/* Pointer to the system's context ID, (such as a GLXContext) */
 	void *system_id;
 
+	/* Does this context have the AMD_performance_monitor extension? */
+	bool have_perfmon;
+
 	metrics_info_t metrics_info;
 	metrics_t *metrics;
 } context_t;
 
 context_t *current_context;
 
+static bool
+check_extension (const char *extension);
+
 static context_t *
 context_create (fips_api_t api, void *system_context_id)
 {
@@ -45,7 +51,9 @@ context_create (fips_api_t api, void *system_context_id)
 
 	fips_dispatch_init (api);
 
-	metrics_info_init (&ctx->metrics_info);
+	ctx->have_perfmon = check_extension ("AMD_performance_monitor");
+
+	metrics_info_init (&ctx->metrics_info, ctx->have_perfmon);
 	ctx->metrics = metrics_create (&ctx->metrics_info);
 
 	return ctx;
@@ -115,3 +123,22 @@ context_end_frame (void)
 {
 	return metrics_end_frame (current_context->metrics);
 }
+
+/* Is the given extension available? */
+static bool
+check_extension (const char *extension)
+{
+	int i, num_extensions;
+	const char *available;
+
+	glGetIntegerv (GL_NUM_EXTENSIONS, &num_extensions);
+
+	for (i = 0; i < num_extensions; i++) {
+		available = (char *) glGetStringi (GL_EXTENSIONS, i);
+		if (strcmp (extension, available) == 0) {
+			return true;
+		}
+	}
+
+	return false;
+}