ImageDecoder::GetImageInfoで取得されるGIF画像の解像度が正しくないのを修正 (#1172)

Siv3D · Dec 27, 2023 · e6c6d66 · e6c6d66
1 parent 6c63dfb
commit e6c6d66
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/Siv3D/src/Siv3D/ImageFormat/GIF/GIFDecoder.cpp b/Siv3D/src/Siv3D/ImageFormat/GIF/GIFDecoder.cpp
@@ -63,16 +63,16 @@ namespace s3d
 
 	Optional<ImageInfo> GIFDecoder::getImageInfo(IReader& reader, const FilePathView) const
 	{
-		uint8 buf[4];
+		uint8 buf[10];
 
 		if (not reader.lookahead(buf))
 		{
 			LOG_FAIL(U"❌ GIFDecoder::getImageInfo(): File size is invalid");
 			return{};
 		}
 
-		const int32 width = ((buf[1] << 8) + (buf[0] << 0));
-		const int32 height = ((buf[3] << 8) + (buf[2] << 0));
+		const int32 width = ((buf[7] << 8) + (buf[6] << 0));
+		const int32 height = ((buf[9] << 8) + (buf[8] << 0));
 		const Size size{ width, height };
 
 		ImagePixelFormat pixelFormat = ImagePixelFormat::R8G8B8A8;