From a4a8e5f32c434aa78b2dab091d09d4c2c6d73214 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Tue, 13 Dec 2016 23:21:33 -0800
Subject: [PATCH] vwebp: clear canvas during resize w/o animation

this corrects the checkboard pattern displayed with transparent images

Change-Id: I5f46dbc9fa3893d61f5f1d4fda643ac030238f94
(cherry picked from commit 67c25ad5b420af07ea4cc5b4957b49ed1b9894bc)
---
 examples/vwebp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/examples/vwebp.c b/examples/vwebp.c
index 67a0750d..e086e6bd 100644
--- a/examples/vwebp.c
+++ b/examples/vwebp.c
@@ -264,6 +264,7 @@ static void HandleReshape(int width, int height) {
   glLoadIdentity();
   kParams.viewport_width = width;
   kParams.viewport_height = height;
+  if (!kParams.has_animation) ClearPreviousFrame();
 }
 
 static void PrintString(const char* const text) {