# Copyright 2018 The dm_control Authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# ============================================================================

"""String constants for the rendering module."""

# Name of the environment variable that selects a renderer platform.

MUJOCO_GL = 'MUJOCO_GL'

# Name of the environment variable that selects a platform for PyOpenGL.

PYOPENGL_PLATFORM = 'PYOPENGL_PLATFORM'

# Renderer platform specifiers.

# All values in each tuple are synonyms for the MUJOCO_GL environment variable.

# The first entry in each tuple is considered "canonical", and is the one

# assigned to the _render.BACKEND variable.

OSMESA = ('osmesa',)

GLFW = ('glfw', 'on', 'enable', 'enabled', 'true', '1', '')

EGL = ('egl',)

# Constant removed.

NO_RENDERER = ('off', 'disable', 'disabled', 'false', '0')