Add a fake vblank to avoid drawing every step

maxfierke · May 21, 2024 · fd95e5d · fd95e5d
1 parent 86df388
commit fd95e5d
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/hardware/dmg.go b/hardware/dmg.go
@@ -3,6 +3,7 @@ package hardware
 import (
 	"fmt"
 	"log"
+	"time"
 
 	"github.com/maxfierke/gogo-gb/cart"
 	"github.com/maxfierke/gogo-gb/cpu"
@@ -127,18 +128,20 @@ func (dmg *DMG) Run(host devices.HostInterface) error {
 
 	hostExit := host.Exited()
 
+	fakeVBlank := time.NewTicker(time.Second / 60)
+
 	for {
 		select {
 		case <-hostExit:
 			return nil
+		case <-fakeVBlank.C:
+			framebuffer <- dmg.lcd.Draw()
 		default:
 			// Do nothing
 		}
 
 		if err := dmg.Step(); err != nil {
 			return err
 		}
-
-		framebuffer <- dmg.lcd.Draw()
 	}
 }