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# Copyright 2018 The glTF-Blender-IO 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.
import bpy
from io_scene_gltf2.io.com import gltf2_io
from io_scene_gltf2.blender.exp.gltf2_blender_gather_cache import cached
from io_scene_gltf2.io.exp.gltf2_io_user_extensions import export_user_extensions
@cached
def gather_sampler(blender_shader_node: bpy.types.Node, export_settings):
if not __filter_sampler(blender_shader_node, export_settings):
return None
sampler = gltf2_io.Sampler(
extensions=__gather_extensions(blender_shader_node, export_settings),
extras=__gather_extras(blender_shader_node, export_settings),
mag_filter=__gather_mag_filter(blender_shader_node, export_settings),
min_filter=__gather_min_filter(blender_shader_node, export_settings),
name=__gather_name(blender_shader_node, export_settings),
wrap_s=__gather_wrap_s(blender_shader_node, export_settings),
wrap_t=__gather_wrap_t(blender_shader_node, export_settings)
)
export_user_extensions('gather_sampler_hook', export_settings, sampler, blender_shader_node)
return sampler
def __filter_sampler(blender_shader_node, export_settings):
if not blender_shader_node.interpolation == 'Closest' and not blender_shader_node.extension == 'CLIP':
return False
return True
def __gather_extensions(blender_shader_node, export_settings):
return None
def __gather_extras(blender_shader_node, export_settings):
return None
def __gather_mag_filter(blender_shader_node, export_settings):
if blender_shader_node.interpolation == 'Closest':
return 9728 # NEAREST
return 9729 # LINEAR
def __gather_min_filter(blender_shader_node, export_settings):
if blender_shader_node.interpolation == 'Closest':
return 9984 # NEAREST_MIPMAP_NEAREST
return 9986 # NEAREST_MIPMAP_LINEAR
def __gather_name(blender_shader_node, export_settings):
return None
def __gather_wrap_s(blender_shader_node, export_settings):
if blender_shader_node.extension == 'EXTEND':
return 33071
return None
def __gather_wrap_t(blender_shader_node, export_settings):
if blender_shader_node.extension == 'EXTEND':
return 33071
return None
@cached
def gather_sampler_from_texture_slot(blender_texture: bpy.types.TextureSlot, export_settings):
magFilter = 9729
wrap = 10497
if blender_texture.texture.extension == 'EXTEND':
wrap = 33071
minFilter = 9986
if magFilter == 9728:
minFilter = 9984
return gltf2_io.Sampler(
extensions=None,
extras=None,
mag_filter=magFilter,
min_filter=minFilter,
name=None,
wrap_s=wrap,
wrap_t=wrap
)
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