optimise

1 files changed, 21 insertions, 13 deletions

diff --git a/03-wolfrand/src/main.c b/03-wolfrand/src/main.c
index 4d4fa34..5d90690 100644
--- a/03-wolfrand/src/main.c
+++ b/03-wolfrand/src/main.c
@@ -11,7 +11,7 @@
 #define DISP_WIDTH 640
 #define DISP_HEIGHT 480
 
-#define FPS 3.3
+#define FPS 15.0
 
 #define DO_INIT(check, desc) \
 	if (!(check)) { \
@@ -46,9 +46,10 @@ int main(int argc, char **argv)
 
 	bool pause = 0;
 
-	ALLEGRO_DISPLAY* d = NULL;
-	ALLEGRO_TIMER* t = NULL;
-	ALLEGRO_EVENT_QUEUE* eq = NULL;
+	ALLEGRO_DISPLAY *d = NULL;
+	ALLEGRO_BITMAP *b = NULL;
+	ALLEGRO_TIMER *t = NULL;
+	ALLEGRO_EVENT_QUEUE *eq = NULL;
 	ALLEGRO_EVENT e;
 
 
@@ -63,6 +64,8 @@ int main(int argc, char **argv)
 
 	al_set_new_display_option(ALLEGRO_SINGLE_BUFFER, 1, ALLEGRO_REQUIRE);
 	DO_INIT(d = al_create_display(DISP_WIDTH, DISP_HEIGHT), "display");
+	al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP);
+	DO_INIT(b = al_create_bitmap(DISP_WIDTH, DISP_HEIGHT), "buffer");
 
 	al_register_event_source(eq, al_get_keyboard_event_source());
 	al_register_event_source(eq, al_get_display_event_source(d));
@@ -126,7 +129,7 @@ int main(int argc, char **argv)
 			memset(bits[1], 0, (DISP_HEIGHT - 1) * DISP_WIDTH / 8);
 
 			for (x = 1; x < DISP_WIDTH - 1; x++) {
-				if (randombytes_random() < 0x20000000)
+				if (randombytes_random() < 0x10000000)
 					bit_toggle(bits[0], x);
 			}
 
@@ -148,20 +151,23 @@ int main(int argc, char **argv)
 
 			/* draw frame */
 
-			al_clear_to_color(al_map_rgb(0, 0, 0));
+			al_lock_bitmap(b, ALLEGRO_PIXEL_FORMAT_ANY, ALLEGRO_LOCK_WRITEONLY);
+
+			al_set_target_bitmap(b);
 
 			for (y = 0; y < DISP_HEIGHT; y++) {
 				for (x = 0; x < DISP_WIDTH; x++) {
-					if (bit_get(bits[y], x)) {
-						al_draw_filled_rectangle(
-							(float)x, (float)y,
-							(float)(x + 1), (float)(y + 1),
-							al_map_rgb(255, 255, 255)
-						);
-					}
+					if (bit_get(bits[y], x))
+						al_put_pixel(x, y, al_map_rgb(255, 255, 255));
+					else
+						al_put_pixel(x, y, al_map_rgb(0, 0, 0));
 				}
 			}
 
+			al_unlock_bitmap(b);
+
+			al_set_target_backbuffer(d);
+			al_draw_bitmap(b, 0, 0, 0);
 			al_flip_display();
 		}
 	}
@@ -171,6 +177,8 @@ done:
 
 	if (d)
 		al_destroy_display(d);
+	if (b)
+		al_destroy_bitmap(b);
 	if (t)
 		al_destroy_timer(t);
 	if (eq)