e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
# SPDX-FileCopyrightText: 2018-2023 Blender Authors
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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__all__ = (
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"batch_for_shader",
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)
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def batch_for_shader(shader, type, content, *, indices=None):
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"""
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Return a batch already configured and compatible with the shader.
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:arg shader: shader for which a compatible format will be computed.
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:type shader: :class:`gpu.types.GPUShader`
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:arg type: "'POINTS', 'LINES', 'TRIS' or 'LINES_ADJ'".
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:type type: str
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:arg content: Maps the name of the shader attribute with the data to fill the vertex buffer.
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:type content: dict
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:return: compatible batch
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:rtype: :class:`gpu.types.GPUBatch`
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"""
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from gpu.types import (
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GPUBatch,
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GPUIndexBuf,
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GPUVertBuf,
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GPUVertFormat,
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)
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def recommended_comp_type(attr_type):
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if attr_type in {'FLOAT', 'VEC2', 'VEC3', 'VEC4', 'MAT3', 'MAT4'}:
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return 'F32'
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if attr_type in {'UINT', 'UVEC2', 'UVEC3', 'UVEC4'}:
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return 'U32'
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# `attr_type` in {'INT', 'IVEC2', 'IVEC3', 'IVEC4', 'BOOL'}.
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return 'I32'
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def recommended_attr_len(attr_name):
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attr_len = 1
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try:
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item = content[attr_name][0]
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while True:
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attr_len *= len(item)
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item = item[0]
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except (TypeError, IndexError):
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pass
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return attr_len
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def recommended_fetch_mode(comp_type):
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if comp_type == 'F32':
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return 'FLOAT'
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return 'INT'
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for data in content.values():
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vbo_len = len(data)
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break
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else:
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raise ValueError("Empty 'content'")
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vbo_format = GPUVertFormat()
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attrs_info = shader.attrs_info_get()
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for name, attr_type in attrs_info:
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comp_type = recommended_comp_type(attr_type)
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attr_len = recommended_attr_len(name)
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vbo_format.attr_add(id=name, comp_type=comp_type, len=attr_len, fetch_mode=recommended_fetch_mode(comp_type))
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vbo = GPUVertBuf(vbo_format, vbo_len)
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for id, data in content.items():
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if len(data) != vbo_len:
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raise ValueError("Length mismatch for 'content' values")
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vbo.attr_fill(id, data)
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if indices is None:
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return GPUBatch(type=type, buf=vbo)
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else:
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ibo = GPUIndexBuf(type=type, seq=indices)
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return GPUBatch(type=type, buf=vbo, elem=ibo)
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