#ifndef METRICS_H
#define METRICS_H
+typedef enum
+{
+ METRICS_OP_ACCUM,
+ METRICS_OP_BUFFER_DATA,
+ METRICS_OP_BUFFER_SUB_DATA,
+ METRICS_OP_BITMAP,
+ METRICS_OP_BLIT_FRAMEBUFFER,
+ METRICS_OP_CLEAR,
+ METRICS_OP_CLEAR_BUFFER_DATA,
+ METRICS_OP_CLEAR_TEX_IMAGE,
+ METRICS_OP_COPY_PIXELS,
+ METRICS_OP_COPY_TEX_IMAGE,
+ METRICS_OP_DRAW_PIXELS,
+ METRICS_OP_GET_TEX_IMAGE,
+ METRICS_OP_READ_PIXELS,
+ METRICS_OP_TEX_IMAGE,
+
+ /* METRICS_OP_SHADER must be last.
+ *
+ * All larger values for metrics_op_t are interpreted as:
+ *
+ * METRICS_OP_SHADER + shader_program_number
+ *
+ * to indicate a specific shader program.
+ */
+ METRICS_OP_SHADER
+} metrics_op_t;
+
+typedef struct metrics metrics_t;
+
+/* Create a new metrics_t object for tracking metrics. */
+metrics_t *
+metrics_create (void);
+
+/* Free all internal resources of a metrics_t
+ *
+ * All outstanding metrics counters are discarded.
+ *
+ * The metrics_t object remains valid and may be used again.
+ */
+void
+metrics_fini (metrics_t *metrics);
+
+/* Destroy a metrics_t object.
+ *
+ * After this call, the metrics_t* value is and must not be used
+ * further. */
+void
+metrics_destroy (metrics_t *metrics);
+
/* Start accumulating GPU time.
*
* The time accumulated will be accounted against the
void
metrics_counter_stop (void);
-/* Set the ID of the currently executing shader program.
+/* Set a metrics_op_t value to indicate what kind of operation is
+ * being performed.
+ *
+ * The metrics-tracking code will account for timings by accumulating
+ * measured counter values into a separate counter for each
+ * metrics_op_t value, (so that the report can describe which
+ * operations are the most expensive).
*
- * The metrics-tracking code will account for per-shader-program
- * timings by accumulating counter values measured while each porogram
- * is active (see metrics_add_counter).
+ * In addition, for the value METRICS_OP_SHADER, each specific shader
+ * program can be distinguished. To accomplish this, pass a value of
+ * METRICS_OP_SHADER + shader_program_number to this function.
*/
void
-metrics_set_current_program (unsigned program);
+metrics_set_current_op (metrics_op_t op);
+
+/* Return the current metrics_op_t value, (the value most-recently-set
+ * with a call to metrics_set_current_op).
+ */
+metrics_op_t
+metrics_get_current_op (void);
/* Should be called at the end of every function wrapper for a
* function that ends a frame, (glXSwapBuffers and similar).
void
metrics_end_frame (void);
+/* Process outstanding metrics requests, accumulating results.
+ *
+ * This function is called automatically by metrics_end_frame.
+ *
+ * During a frame, it may be important to call this function to avoid
+ * too many oustanding timer/performance-monitor queries. At the same
+ * time, it's important not to call this function too frequently,
+ * since collection of metrics information will result in flushes of
+ * the OpenGL pipeline which can interfere with the behavior being
+ * measured.
+ */
+void
+metrics_collect_available (void);
+
#endif