render speed

semestralka1/src/render/loop.cpp

@@ -1,4 +1,4 @@
-// src/render/loop.c
+// src/render/loop.cpp
 
 #include "loop.h"
 #include "mbed.h"
@@ -15,7 +15,7 @@ static bool message_active = false;
 
 void draw_mask(const char *unused_filename, int shift, const char *text = nullptr);
 
-void render_loop() {
+void render_loop(int speed) {
     Timer msg_timer;
     Timer anim_timer;
     msg_timer.start();
@@ -49,8 +49,9 @@ void render_loop() {
         }
 
         // Animation tick
-        if (anim_timer.elapsed_time() >= 80ms) {
-            shift++;
+        if (anim_timer.elapsed_time() >= 200ms) {
+	    // speed determines scroll steps per tick
+            shift += speed;
             anim_timer.reset();
             need_redraw = true;
         }
@@ -59,9 +60,9 @@ void render_loop() {
         if (need_redraw) {
             draw_mask(bg_file, shift, message_active ? message : nullptr);
             need_redraw = false;
-            ThisThread::sleep_for(60ms);
+            ThisThread::sleep_for(50ms);
         }
 
-        ThisThread::sleep_for(20ms);
+        ThisThread::sleep_for(25ms);
     }
 }