X-Git-Url: https://git.cworth.org/git?p=fips;a=blobdiff_plain;f=context.c;h=3c58a60e6b2fbd76ca7a13dfaa3248f67fd43828;hp=6fbd7f2228ea2bfc2ff3b4b1d2d933f24f4ed27a;hb=HEAD;hpb=bc106316b96ce7bfdbec3ee54ba37e49f156dea5

diff --git a/context.c b/context.c
index 6fbd7f2..3c58a60 100644
--- a/context.c
+++ b/context.c
@@ -20,22 +20,125 @@
  */
 
 #include "context.h"
-
 #include "metrics.h"
+#include "xmalloc.h"
 
-void
-context_enter (fips_api_t api, void *system_context_id unused)
+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)
+{
+	context_t *ctx;
+
+	ctx = xcalloc (1, sizeof (*ctx));
+
+	ctx->system_id = system_context_id;
+
 	fips_dispatch_init (api);
 
-	metrics_info_init ();
+	ctx->have_perfmon = check_extension ("GL_AMD_performance_monitor");
+
+	metrics_info_init (&ctx->metrics_info, ctx->have_perfmon);
+	ctx->metrics = metrics_create (&ctx->metrics_info);
 
-	metrics_set_current_op (METRICS_OP_SHADER + 0);
-	metrics_counter_start ();
+	return ctx;
+}
+
+static void
+context_destroy (context_t *ctx)
+{
+	metrics_info_fini (&ctx->metrics_info);
+}
+
+void
+context_enter (fips_api_t api, void *system_context_id)
+{
+	/* Do nothing if the application is setting the same context
+	 * as is already current. */
+	if (current_context && current_context->system_id == system_context_id)
+		return;
+
+	if (current_context)
+		context_destroy (current_context);
+
+	current_context = context_create (api, system_context_id);
+
+	metrics_set_current_op (current_context->metrics,
+				METRICS_OP_SHADER + 0);
+	metrics_counter_start (current_context->metrics);
 }
 
 void
 context_leave (void)
 {
-	metrics_info_fini ();
+	context_t *ctx = current_context;
+
+	if (ctx == NULL)
+		return;
+
+	metrics_destroy (ctx->metrics);
+}
+
+void
+context_counter_start (void)
+{
+	metrics_counter_start (current_context->metrics);
+}
+
+void
+context_counter_stop (void)
+{
+	metrics_counter_stop (current_context->metrics);
+}
+
+void
+context_set_current_op (metrics_op_t op)
+{
+	metrics_set_current_op (current_context->metrics, op);
+}
+
+metrics_op_t
+context_get_current_op (void)
+{
+	return metrics_get_current_op (current_context->metrics);
+}
+
+void
+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;
 }