- Viewport is not passed and stored as a shared_ptr instead of raw reference. - ViewportController can now be injected with an undo stack (not a ctor param anymore, as a preparation for the move of the undo stack to an interactor) - Added (temp) flag to disable emscripten events registration in the WebAssemblyViewport (because legacy client code deals with them directly) - Added emscripten_clear_timeout in ~WebGLViewportsRegistry - Removed GenericToolbox::HoldingRef whose responsibility is better served with proper callback un-registration.

#pragma once

#if ORTHANC_ENABLE_WASM == 1
// https://emscripten.org/docs/optimizing/Optimizing-WebGL.html
#  define ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE "precision mediump float;\n"
#else
#  define ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE "#version 110\n"
#endif