From 298daa4e8370c2b27df5ae0ea1eebb8d60211968 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 9 Oct 2025 10:56:33 +0530
Subject: [PATCH] Utility method to save frame as uncompressed PNG

---
 tools/utils/images/loading.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/utils/images/loading.go b/tools/utils/images/loading.go
index ebd1de262..b6a05a729 100644
--- a/tools/utils/images/loading.go
+++ b/tools/utils/images/loading.go
@@ -10,6 +10,7 @@ import (
 	"image"
 	"image/color"
 	"image/gif"
+	"image/png"
 	"io"
 	"os"
 	"os/exec"
@@ -176,6 +177,11 @@ type SerializableImageMetadata struct {
 
 const SERIALIZE_VERSION = 1
 
+func (self *ImageFrame) SaveAsUncompressedPNG(output io.Writer) error {
+	encoder := png.Encoder{CompressionLevel: png.NoCompression}
+	return encoder.Encode(output, self.Img)
+}
+
 func (self *ImageData) SerializeOnlyMetadata() SerializableImageMetadata {
 	f := make([]SerializableImageFrame, len(self.Frames))
 	for i, s := range self.Frames {