From 750e4d6261c1af2d167cbec7f24bf74379ebd7ee Mon Sep 17 00:00:00 2001
From: Hermet Park <hermet@lottiefiles.com>
Date: Mon, 13 Nov 2023 20:32:48 +0900
Subject: [PATCH] wasm: Set a GIF background color.

Use a white background by default.
---
 src/bindings/wasm/tvgWasm.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/bindings/wasm/tvgWasm.cpp b/src/bindings/wasm/tvgWasm.cpp
index 99c36508..8b04b80f 100644
--- a/src/bindings/wasm/tvgWasm.cpp
+++ b/src/bindings/wasm/tvgWasm.cpp
@@ -22,8 +22,6 @@
 
 #include <thorvg.h>
 #include <emscripten/bind.h>
-#include "tvgIteratorAccessor.h"
-
 
 using namespace emscripten;
 using namespace std;
@@ -242,6 +240,13 @@ public:
             return false;
         }
 
+        //set a white opaque background
+        auto bg = tvg::Shape::gen();
+        bg->fill(255, 255, 255, 255);
+        bg->appendRect(0, 0, ow * scale, oh * scale);
+
+        saver->background(std::move(bg));
+
         if (saver->save(std::move(animation), "output.gif", 100, fps) != tvg::Result::Success) {
             errorMsg = "save(), fail";
             return false;