Постоянная DEPTH_ATTACHMENT
Реализация
static const int DEPTH_ATTACHMENT = 0x8D00;
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-web_gl/WebGL/DEPTH_ATTACHMENT-constant.html
