Add a test for text performance

Add tests/test-text-perf, which allows testing text performance as
a function of the length of text strings and font size.

tests/micro-bench/Makefile.am

@@ -1,6 +1,7 @@
 noinst_PROGRAMS = \
 	test-text \
-	test-picking
+	test-picking \
+	test-text-perf
 
 INCLUDES = -I$(top_srcdir)/ -I$(top_srcdir)/clutter -I$(top_builddir)/clutter
 LDADD = $(top_builddir)/clutter/libclutter-@CLUTTER_FLAVOUR@-@CLUTTER_MAJORMINOR@.la
@@ -12,4 +13,5 @@ AM_LDFLAGS = $(CLUTTER_LIBS)
 
 test_text_SOURCES = test-text.c
 test_picking_SOURCES = test-picking.c
+test_text_perf_SOURCES = test-text-perf.c
 

tests/micro-bench/test-text-perf.c

@@ -0,0 +1,123 @@
+#include <clutter/clutter.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#define STAGE_WIDTH  800
+#define STAGE_HEIGHT 600
+
+static int font_size;
+static int n_chars;
+static int rows, cols;
+
+gboolean idle (gpointer data)
+{
+  ClutterActor *stage = CLUTTER_ACTOR (data);
+  
+  static GTimer *timer = NULL;
+  static int fps = 0;
+  
+  if (!timer)
+    {
+      timer = g_timer_new ();
+      g_timer_start (timer);
+    }
+  
+  if (g_timer_elapsed (timer, NULL) >= 1)
+    {
+      printf ("fps=%d, strings/sec=%d, chars/sec=%d\n",
+	      fps,
+	      fps * rows * cols,
+	      fps * rows * cols * n_chars);
+      g_timer_start (timer);
+      fps = 0;
+    }
+  
+  clutter_actor_paint (stage);
+  ++fps;
+
+  return TRUE;
+}
+
+static ClutterActor *
+create_label()
+{
+  ClutterColor label_color = { 0xff, 0xff, 0xff, 0xff };
+  ClutterActor *label;
+  char         *font_name;
+  GString      *str;
+  int           i;
+
+  font_name = g_strdup_printf ("Monospace %dpx", font_size);
+
+  str = g_string_new (NULL);
+  for (i < 0; i < n_chars; i++)
+    g_string_append_c (str, 'A' + (i % 26));
+
+  label = clutter_text_new_with_text (font_name, str->str);
+  clutter_text_set_color (CLUTTER_TEXT (label), &label_color);
+
+  g_free (font_name);
+  g_string_free (str, TRUE);
+
+  return label;
+}
+
+int
+main (int argc, char *argv[])
+{
+  ClutterActor    *stage;
+  ClutterColor     stage_color = { 0x00, 0x00, 0x00, 0xff };
+  ClutterActor    *label;
+  int              w, h;
+  int              row, col;
+
+  clutter_init (&argc, &argv);
+
+  if (argc != 3)
+    {
+      g_printerr ("Usage test-text-perf FONT_SIZE N_CHARS\n");
+      exit (1);
+    }
+
+  font_size = atoi (argv[1]);
+  n_chars = atoi (argv[2]);
+
+  g_print ("Monospace %dpx, string length = %d\n", font_size, n_chars);
+
+  stage = clutter_stage_get_default ();
+  clutter_actor_set_size (stage, STAGE_WIDTH, STAGE_HEIGHT);
+  clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
+
+  label = create_label ();
+  w = clutter_actor_get_width (label);
+  h = clutter_actor_get_height (label);
+  cols = STAGE_WIDTH / w;
+  rows = STAGE_HEIGHT / h;
+  clutter_actor_destroy (label);
+
+  if (cols == 0 || rows == 0)
+    {
+      g_printerr("Too many characters to fit in stage\n");
+      exit(1);
+    }
+
+  for (row=0; row<rows; row++)
+    for (col=0; col<cols; col++)
+      {
+	label = create_label();
+	clutter_actor_set_position (label, w * col, h * row);
+	clutter_container_add_actor (CLUTTER_CONTAINER (stage), label);
+      }
+
+  clutter_actor_show_all (stage);
+
+  g_signal_connect (stage, "key-press-event",
+		    G_CALLBACK (clutter_main_quit), NULL);
+  
+  g_idle_add (idle, (gpointer) stage);
+
+  clutter_main();
+
+  return 0;
+}