diff options
author | Jacques Lucke <mail@jlucke.com> | 2018-10-26 04:38:04 +0300 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2018-10-26 04:40:43 +0300 |
commit | 0264c050bf277494a187b32d51be13b0760f81c0 (patch) | |
tree | 5b76769008973c3d9145dc5cd7ca91f760cce78c /release/scripts/modules/gpu_extras | |
parent | ca8fee62abc17fd514994c1c0bf34a3234be902a (diff) |
PyAPI: gpu utility module to create new batches
Support the common case of creating batches from python geometry,
a shader and optionally indices.
See D3779
Diffstat (limited to 'release/scripts/modules/gpu_extras')
-rw-r--r-- | release/scripts/modules/gpu_extras/__init__.py | 1 | ||||
-rw-r--r-- | release/scripts/modules/gpu_extras/batch.py | 62 |
2 files changed, 63 insertions, 0 deletions
diff --git a/release/scripts/modules/gpu_extras/__init__.py b/release/scripts/modules/gpu_extras/__init__.py index 221c7e2da58..7448113e2fa 100644 --- a/release/scripts/modules/gpu_extras/__init__.py +++ b/release/scripts/modules/gpu_extras/__init__.py @@ -17,5 +17,6 @@ # ***** END GPL LICENSE BLOCK ***** __all__ = ( + "batch", "presets", ) diff --git a/release/scripts/modules/gpu_extras/batch.py b/release/scripts/modules/gpu_extras/batch.py new file mode 100644 index 00000000000..6a403a66089 --- /dev/null +++ b/release/scripts/modules/gpu_extras/batch.py @@ -0,0 +1,62 @@ +# ***** BEGIN GPL LICENSE BLOCK ***** +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software Foundation, +# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +# ***** END GPL LICENSE BLOCK ***** + +__all__ = ( + "batch_for_shader" +) + + +def batch_for_shader(shader, type, content, indices=None): + """ + Return a batch already configured and compatible with the shader. + + :arg shader: shader for which a compatible format will be computed. + :type shader: :class:`gpu.types.GPUShader` + :arg type: "'POINTS', 'LINES', 'TRIS' or 'LINES_ADJ'". + :type type: str + :arg content: Maps the name of the shader attribute with the data to fill the vertex buffer. + :type content: dict + :return: compatible batch + :rtype: :class:`gpu.types.Batch` + """ + import gpu + from gpu.types import ( + GPUBatch, + GPUIndexBuf, + GPUVertBuf, + ) + + for data in content.values(): + vbo_len = len(data) + break + else: + raise ValueError("Empty 'content'") + + vbo_format = shader.format_calc() + vbo = GPUVertBuf(vbo_format, vbo_len) + + for id, data in content.items(): + if len(data) != vbo_len: + raise ValueError("Length mismatch for 'content' values") + vbo.attr_fill(id, data) + + if indices is None: + return GPUBatch(type=type, buf=vbo) + else: + ibo = GPUIndexBuf(type=type, seq=indices) + return GPUBatch(type=type, buf=vbo, elem=ibo) |