void OnGUI()
{
m_gradient = EditorGUILayout.GradientField(m_gradient);
m_textureWidth = EditorGUILayout.IntField(m_textureWidth);
if (GUILayout.Button("Generate"))
{
string path = EditorUtility.SaveFilePanel("Save", "", "Gradient", "png");
var pngData = m_gradient.CreateTexture(m_textureWidth).EncodeToPNG();
File.WriteAllBytes(path, pngData);
}
}
