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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bpygpu
*
* - Use `bpygpu_` for local API.
* - Use `BPyGPU` for public API.
*/
#include <Python.h>
#include "../generic/py_capi_utils.h"
#include "../generic/python_utildefines.h"
#include "gpu_py_vertex_format.h" /* own include */
/* -------------------------------------------------------------------- */
/** \name Enum Conversion
*
* Use with PyArg_ParseTuple's "O&" formatting.
* \{ */
static struct PyC_StringEnumItems pygpu_vertcomptype_items[] = {
{GPU_COMP_I8, "I8"},
{GPU_COMP_U8, "U8"},
{GPU_COMP_I16, "I16"},
{GPU_COMP_U16, "U16"},
{GPU_COMP_I32, "I32"},
{GPU_COMP_U32, "U32"},
{GPU_COMP_F32, "F32"},
{GPU_COMP_I10, "I10"},
{0, NULL},
};
static struct PyC_StringEnumItems pygpu_vertfetchmode_items[] = {
{GPU_FETCH_FLOAT, "FLOAT"},
{GPU_FETCH_INT, "INT"},
{GPU_FETCH_INT_TO_FLOAT_UNIT, "INT_TO_FLOAT_UNIT"},
{GPU_FETCH_INT_TO_FLOAT, "INT_TO_FLOAT"},
{0, NULL},
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name VertFormat Type
* \{ */
static PyObject *pygpu_vertformat__tp_new(PyTypeObject *UNUSED(type),
PyObject *args,
PyObject *kwds)
{
if (PyTuple_GET_SIZE(args) || (kwds && PyDict_Size(kwds))) {
PyErr_SetString(PyExc_ValueError, "This function takes no arguments");
return NULL;
}
return BPyGPUVertFormat_CreatePyObject(NULL);
}
PyDoc_STRVAR(
pygpu_vertformat_attr_add_doc,
".. method:: attr_add(id, comp_type, len, fetch_mode)\n"
"\n"
" Add a new attribute to the format.\n"
"\n"
" :param id: Name the attribute. Often `position`, `normal`, ...\n"
" :type id: str\n"
" :param comp_type: The data type that will be used store the value in memory.\n"
" Possible values are `I8`, `U8`, `I16`, `U16`, `I32`, `U32`, `F32` and `I10`.\n"
" :type comp_type: str\n"
" :param len: How many individual values the attribute consists of\n"
" (e.g. 2 for uv coordinates).\n"
" :type len: int\n"
" :param fetch_mode: How values from memory will be converted when used in the shader.\n"
" This is mainly useful for memory optimizations when you want to store values with\n"
" reduced precision. E.g. you can store a float in only 1 byte but it will be\n"
" converted to a normal 4 byte float when used.\n"
" Possible values are `FLOAT`, `INT`, `INT_TO_FLOAT_UNIT` and `INT_TO_FLOAT`.\n"
" :type fetch_mode: str\n");
static PyObject *pygpu_vertformat_attr_add(BPyGPUVertFormat *self, PyObject *args, PyObject *kwds)
{
const char *id;
uint len;
struct PyC_StringEnum comp_type = {pygpu_vertcomptype_items, GPU_COMP_I8};
struct PyC_StringEnum fetch_mode = {pygpu_vertfetchmode_items, GPU_FETCH_FLOAT};
if (self->fmt.attr_len == GPU_VERT_ATTR_MAX_LEN) {
PyErr_SetString(PyExc_ValueError, "Maximum attr reached " STRINGIFY(GPU_VERT_ATTR_MAX_LEN));
return NULL;
}
static const char *_keywords[] = {"id", "comp_type", "len", "fetch_mode", NULL};
static _PyArg_Parser _parser = {
"$" /* Keyword only arguments. */
"s" /* `id` */
"O&" /* `comp_type` */
"I" /* `len` */
"O&" /* `fetch_mode` */
":attr_add",
_keywords,
0,
};
if (!_PyArg_ParseTupleAndKeywordsFast(args,
kwds,
&_parser,
&id,
PyC_ParseStringEnum,
&comp_type,
&len,
PyC_ParseStringEnum,
&fetch_mode)) {
return NULL;
}
uint attr_id = GPU_vertformat_attr_add(
&self->fmt, id, comp_type.value_found, len, fetch_mode.value_found);
return PyLong_FromLong(attr_id);
}
static struct PyMethodDef pygpu_vertformat__tp_methods[] = {
{"attr_add",
(PyCFunction)pygpu_vertformat_attr_add,
METH_VARARGS | METH_KEYWORDS,
pygpu_vertformat_attr_add_doc},
{NULL, NULL, 0, NULL},
};
static void pygpu_vertformat__tp_dealloc(BPyGPUVertFormat *self)
{
Py_TYPE(self)->tp_free(self);
}
PyDoc_STRVAR(pygpu_vertformat__tp_doc,
".. class:: GPUVertFormat()\n"
"\n"
" This object contains information about the structure of a vertex buffer.\n");
PyTypeObject BPyGPUVertFormat_Type = {
PyVarObject_HEAD_INIT(NULL, 0).tp_name = "GPUVertFormat",
.tp_basicsize = sizeof(BPyGPUVertFormat),
.tp_dealloc = (destructor)pygpu_vertformat__tp_dealloc,
.tp_flags = Py_TPFLAGS_DEFAULT,
.tp_doc = pygpu_vertformat__tp_doc,
.tp_methods = pygpu_vertformat__tp_methods,
.tp_new = pygpu_vertformat__tp_new,
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Public API
* \{ */
PyObject *BPyGPUVertFormat_CreatePyObject(GPUVertFormat *fmt)
{
BPyGPUVertFormat *self;
self = PyObject_New(BPyGPUVertFormat, &BPyGPUVertFormat_Type);
if (fmt) {
self->fmt = *fmt;
}
else {
memset(&self->fmt, 0, sizeof(self->fmt));
}
return (PyObject *)self;
}
/** \} */
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