From beaf862dec4c8e82cc11d65342331b3c519aba6a Mon Sep 17 00:00:00 2001
From: Sergey Stepanov <sergystepanov@gmail.com>
Date: Fri, 10 Feb 2023 17:47:58 +0300
Subject: [PATCH] Don't cache nil frames

---
 pkg/worker/emulator/image/canvas.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkg/worker/emulator/image/canvas.go b/pkg/worker/emulator/image/canvas.go
index 83e2d1a4..84194ee1 100644
--- a/pkg/worker/emulator/image/canvas.go
+++ b/pkg/worker/emulator/image/canvas.go
@@ -60,8 +60,12 @@ func (c *Canvas) Get(w, h int) *Frame {
 	return i
 }
 
-func (c *Canvas) Put(i *Frame) { c.pool.Put(i) }
-func (c *Canvas) Clear()       { c.wg = sync.WaitGroup{} }
+func (c *Canvas) Put(i *Frame) {
+	if i != nil {
+		c.pool.Put(i)
+	}
+}
+func (c *Canvas) Clear() { c.wg = sync.WaitGroup{} }
 
 func (c *Canvas) Draw(encoding uint32, rot *Rotate, w, h, packedW, bpp int, data []byte, th int) *Frame {
 	dst := c.Get(w, h)