tornavis/source/blender/python/generic/imbuf_py_api.cc

683 lines
19 KiB
C++

/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup pygen
*
* This file defines the 'imbuf' image manipulation module.
*/
#include <Python.h>
#include "BLI_rect.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "py_capi_utils.h"
#include "python_compat.h"
#include "python_utildefines.h"
#include "imbuf_py_api.h" /* own include */
#include "../../imbuf/IMB_imbuf.h"
#include "../../imbuf/IMB_imbuf_types.h"
/* File IO */
#include "BLI_fileops.h"
#include <cerrno>
#include <fcntl.h>
static PyObject *BPyInit_imbuf_types(void);
static PyObject *Py_ImBuf_CreatePyObject(ImBuf *ibuf);
/* -------------------------------------------------------------------- */
/** \name Type & Utilities
* \{ */
struct Py_ImBuf {
PyObject_VAR_HEAD
/* can be nullptr */
ImBuf *ibuf;
};
static int py_imbuf_valid_check(Py_ImBuf *self)
{
if (LIKELY(self->ibuf)) {
return 0;
}
PyErr_Format(
PyExc_ReferenceError, "ImBuf data of type %.200s has been freed", Py_TYPE(self)->tp_name);
return -1;
}
#define PY_IMBUF_CHECK_OBJ(obj) \
if (UNLIKELY(py_imbuf_valid_check(obj) == -1)) { \
return nullptr; \
} \
((void)0)
#define PY_IMBUF_CHECK_INT(obj) \
if (UNLIKELY(py_imbuf_valid_check(obj) == -1)) { \
return -1; \
} \
((void)0)
/** \} */
/* -------------------------------------------------------------------- */
/** \name Methods
* \{ */
PyDoc_STRVAR(py_imbuf_resize_doc,
".. method:: resize(size, method='FAST')\n"
"\n"
" Resize the image.\n"
"\n"
" :arg size: New size.\n"
" :type size: pair of ints\n"
" :arg method: Method of resizing ('FAST', 'BILINEAR')\n"
" :type method: str\n");
static PyObject *py_imbuf_resize(Py_ImBuf *self, PyObject *args, PyObject *kw)
{
PY_IMBUF_CHECK_OBJ(self);
int size[2];
enum { FAST, BILINEAR };
const PyC_StringEnumItems method_items[] = {
{FAST, "FAST"},
{BILINEAR, "BILINEAR"},
{0, nullptr},
};
PyC_StringEnum method = {method_items, FAST};
static const char *_keywords[] = {"size", "method", nullptr};
static _PyArg_Parser _parser = {
PY_ARG_PARSER_HEAD_COMPAT()
"(ii)" /* `size` */
"|$" /* Optional keyword only arguments. */
"O&" /* `method` */
":resize",
_keywords,
nullptr,
};
if (!_PyArg_ParseTupleAndKeywordsFast(
args, kw, &_parser, &size[0], &size[1], PyC_ParseStringEnum, &method))
{
return nullptr;
}
if (size[0] <= 0 || size[1] <= 0) {
PyErr_Format(PyExc_ValueError, "resize: Image size cannot be below 1 (%d, %d)", UNPACK2(size));
return nullptr;
}
if (method.value_found == FAST) {
IMB_scalefastImBuf(self->ibuf, UNPACK2(size));
}
else if (method.value_found == BILINEAR) {
IMB_scaleImBuf(self->ibuf, UNPACK2(size));
}
else {
BLI_assert_unreachable();
}
Py_RETURN_NONE;
}
PyDoc_STRVAR(py_imbuf_crop_doc,
".. method:: crop(min, max)\n"
"\n"
" Crop the image.\n"
"\n"
" :arg min: X, Y minimum.\n"
" :type min: pair of ints\n"
" :arg max: X, Y maximum.\n"
" :type max: pair of ints\n");
static PyObject *py_imbuf_crop(Py_ImBuf *self, PyObject *args, PyObject *kw)
{
PY_IMBUF_CHECK_OBJ(self);
rcti crop;
static const char *_keywords[] = {"min", "max", nullptr};
static _PyArg_Parser _parser = {
PY_ARG_PARSER_HEAD_COMPAT()
"(II)" /* `min` */
"(II)" /* `max` */
":crop",
_keywords,
nullptr,
};
if (!_PyArg_ParseTupleAndKeywordsFast(
args, kw, &_parser, &crop.xmin, &crop.ymin, &crop.xmax, &crop.ymax))
{
return nullptr;
}
if (/* X range. */
!(crop.xmin >= 0 && crop.xmax < self->ibuf->x) ||
/* Y range. */
!(crop.ymin >= 0 && crop.ymax < self->ibuf->y) ||
/* X order. */
!(crop.xmin <= crop.xmax) ||
/* Y order. */
!(crop.ymin <= crop.ymax))
{
PyErr_SetString(PyExc_ValueError, "ImBuf crop min/max not in range");
return nullptr;
}
IMB_rect_crop(self->ibuf, &crop);
Py_RETURN_NONE;
}
PyDoc_STRVAR(py_imbuf_copy_doc,
".. method:: copy()\n"
"\n"
" :return: A copy of the image.\n"
" :rtype: :class:`ImBuf`\n");
static PyObject *py_imbuf_copy(Py_ImBuf *self)
{
PY_IMBUF_CHECK_OBJ(self);
ImBuf *ibuf_copy = IMB_dupImBuf(self->ibuf);
if (UNLIKELY(ibuf_copy == nullptr)) {
PyErr_SetString(PyExc_MemoryError,
"ImBuf.copy(): "
"failed to allocate memory");
return nullptr;
}
return Py_ImBuf_CreatePyObject(ibuf_copy);
}
static PyObject *py_imbuf_deepcopy(Py_ImBuf *self, PyObject *args)
{
if (!PyC_CheckArgs_DeepCopy(args)) {
return nullptr;
}
return py_imbuf_copy(self);
}
PyDoc_STRVAR(py_imbuf_free_doc,
".. method:: free()\n"
"\n"
" Clear image data immediately (causing an error on re-use).\n");
static PyObject *py_imbuf_free(Py_ImBuf *self)
{
if (self->ibuf) {
IMB_freeImBuf(self->ibuf);
self->ibuf = nullptr;
}
Py_RETURN_NONE;
}
#if (defined(__GNUC__) && !defined(__clang__))
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wcast-function-type"
#endif
static PyMethodDef Py_ImBuf_methods[] = {
{"resize", (PyCFunction)py_imbuf_resize, METH_VARARGS | METH_KEYWORDS, py_imbuf_resize_doc},
{"crop", (PyCFunction)py_imbuf_crop, METH_VARARGS | METH_KEYWORDS, (char *)py_imbuf_crop_doc},
{"free", (PyCFunction)py_imbuf_free, METH_NOARGS, py_imbuf_free_doc},
{"copy", (PyCFunction)py_imbuf_copy, METH_NOARGS, py_imbuf_copy_doc},
{"__copy__", (PyCFunction)py_imbuf_copy, METH_NOARGS, py_imbuf_copy_doc},
{"__deepcopy__", (PyCFunction)py_imbuf_deepcopy, METH_VARARGS, py_imbuf_copy_doc},
{nullptr, nullptr, 0, nullptr},
};
#if (defined(__GNUC__) && !defined(__clang__))
# pragma GCC diagnostic pop
#endif
/** \} */
/* -------------------------------------------------------------------- */
/** \name Attributes
* \{ */
PyDoc_STRVAR(py_imbuf_size_doc, "size of the image in pixels.\n\n:type: pair of ints");
static PyObject *py_imbuf_size_get(Py_ImBuf *self, void * /*closure*/)
{
PY_IMBUF_CHECK_OBJ(self);
ImBuf *ibuf = self->ibuf;
return PyC_Tuple_Pack_I32({ibuf->x, ibuf->y});
}
PyDoc_STRVAR(py_imbuf_ppm_doc, "pixels per meter.\n\n:type: pair of floats");
static PyObject *py_imbuf_ppm_get(Py_ImBuf *self, void * /*closure*/)
{
PY_IMBUF_CHECK_OBJ(self);
ImBuf *ibuf = self->ibuf;
return PyC_Tuple_Pack_F64({ibuf->ppm[0], ibuf->ppm[1]});
}
static int py_imbuf_ppm_set(Py_ImBuf *self, PyObject *value, void * /*closure*/)
{
PY_IMBUF_CHECK_INT(self);
double ppm[2];
if (PyC_AsArray(ppm, sizeof(*ppm), value, 2, &PyFloat_Type, "ppm") == -1) {
return -1;
}
if (ppm[0] <= 0.0 || ppm[1] <= 0.0) {
PyErr_SetString(PyExc_ValueError, "invalid ppm value");
return -1;
}
ImBuf *ibuf = self->ibuf;
ibuf->ppm[0] = ppm[0];
ibuf->ppm[1] = ppm[1];
return 0;
}
PyDoc_STRVAR(py_imbuf_filepath_doc, "filepath associated with this image.\n\n:type: string");
static PyObject *py_imbuf_filepath_get(Py_ImBuf *self, void * /*closure*/)
{
PY_IMBUF_CHECK_OBJ(self);
ImBuf *ibuf = self->ibuf;
return PyC_UnicodeFromBytes(ibuf->filepath);
}
static int py_imbuf_filepath_set(Py_ImBuf *self, PyObject *value, void * /*closure*/)
{
PY_IMBUF_CHECK_INT(self);
if (!PyUnicode_Check(value)) {
PyErr_SetString(PyExc_TypeError, "expected a string!");
return -1;
}
ImBuf *ibuf = self->ibuf;
const Py_ssize_t value_str_len_max = sizeof(ibuf->filepath);
Py_ssize_t value_str_len;
const char *value_str = PyUnicode_AsUTF8AndSize(value, &value_str_len);
if (value_str_len >= value_str_len_max) {
PyErr_Format(PyExc_TypeError, "filepath length over %zd", value_str_len_max - 1);
return -1;
}
memcpy(ibuf->filepath, value_str, value_str_len + 1);
return 0;
}
PyDoc_STRVAR(py_imbuf_planes_doc, "Number of bits associated with this image.\n\n:type: int");
static PyObject *py_imbuf_planes_get(Py_ImBuf *self, void * /*closure*/)
{
PY_IMBUF_CHECK_OBJ(self);
ImBuf *imbuf = self->ibuf;
return PyLong_FromLong(imbuf->planes);
}
PyDoc_STRVAR(py_imbuf_channels_doc, "Number of bit-planes.\n\n:type: int");
static PyObject *py_imbuf_channels_get(Py_ImBuf *self, void * /*closure*/)
{
PY_IMBUF_CHECK_OBJ(self);
ImBuf *imbuf = self->ibuf;
return PyLong_FromLong(imbuf->channels);
}
static PyGetSetDef Py_ImBuf_getseters[] = {
{"size", (getter)py_imbuf_size_get, (setter) nullptr, py_imbuf_size_doc, nullptr},
{"ppm", (getter)py_imbuf_ppm_get, (setter)py_imbuf_ppm_set, py_imbuf_ppm_doc, nullptr},
{"filepath",
(getter)py_imbuf_filepath_get,
(setter)py_imbuf_filepath_set,
py_imbuf_filepath_doc,
nullptr},
{"planes", (getter)py_imbuf_planes_get, nullptr, py_imbuf_planes_doc, nullptr},
{"channels", (getter)py_imbuf_channels_get, nullptr, py_imbuf_channels_doc, nullptr},
{nullptr, nullptr, nullptr, nullptr, nullptr} /* Sentinel */
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Type & Implementation
* \{ */
static void py_imbuf_dealloc(Py_ImBuf *self)
{
ImBuf *ibuf = self->ibuf;
if (ibuf != nullptr) {
IMB_freeImBuf(self->ibuf);
self->ibuf = nullptr;
}
PyObject_DEL(self);
}
static PyObject *py_imbuf_repr(Py_ImBuf *self)
{
const ImBuf *ibuf = self->ibuf;
if (ibuf != nullptr) {
return PyUnicode_FromFormat("<imbuf: address=%p, filepath='%s', size=(%d, %d)>",
ibuf,
ibuf->filepath,
ibuf->x,
ibuf->y);
}
return PyUnicode_FromString("<imbuf: address=0x0>");
}
static Py_hash_t py_imbuf_hash(Py_ImBuf *self)
{
return _Py_HashPointer(self->ibuf);
}
PyTypeObject Py_ImBuf_Type = {
/*ob_base*/ PyVarObject_HEAD_INIT(nullptr, 0)
/*tp_name*/ "ImBuf",
/*tp_basicsize*/ sizeof(Py_ImBuf),
/*tp_itemsize*/ 0,
/*tp_dealloc*/ (destructor)py_imbuf_dealloc,
/*tp_vectorcall_offset*/ 0,
/*tp_getattr*/ nullptr,
/*tp_setattr*/ nullptr,
/*tp_as_async*/ nullptr,
/*tp_repr*/ (reprfunc)py_imbuf_repr,
/*tp_as_number*/ nullptr,
/*tp_as_sequence*/ nullptr,
/*tp_as_mapping*/ nullptr,
/*tp_hash*/ (hashfunc)py_imbuf_hash,
/*tp_call*/ nullptr,
/*tp_str*/ nullptr,
/*tp_getattro*/ nullptr,
/*tp_setattro*/ nullptr,
/*tp_as_buffer*/ nullptr,
/*tp_flags*/ Py_TPFLAGS_DEFAULT,
/*tp_doc*/ nullptr,
/*tp_traverse*/ nullptr,
/*tp_clear*/ nullptr,
/*tp_richcompare*/ nullptr,
/*tp_weaklistoffset*/ 0,
/*tp_iter*/ nullptr,
/*tp_iternext*/ nullptr,
/*tp_methods*/ Py_ImBuf_methods,
/*tp_members*/ nullptr,
/*tp_getset*/ Py_ImBuf_getseters,
/*tp_base*/ nullptr,
/*tp_dict*/ nullptr,
/*tp_descr_get*/ nullptr,
/*tp_descr_set*/ nullptr,
/*tp_dictoffset*/ 0,
/*tp_init*/ nullptr,
/*tp_alloc*/ nullptr,
/*tp_new*/ nullptr,
/*tp_free*/ nullptr,
/*tp_is_gc*/ nullptr,
/*tp_bases*/ nullptr,
/*tp_mro*/ nullptr,
/*tp_cache*/ nullptr,
/*tp_subclasses*/ nullptr,
/*tp_weaklist*/ nullptr,
/*tp_del*/ nullptr,
/*tp_version_tag*/ 0,
/*tp_finalize*/ nullptr,
/*tp_vectorcall*/ nullptr,
};
static PyObject *Py_ImBuf_CreatePyObject(ImBuf *ibuf)
{
Py_ImBuf *self = PyObject_New(Py_ImBuf, &Py_ImBuf_Type);
self->ibuf = ibuf;
return (PyObject *)self;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Module Functions
* \{ */
PyDoc_STRVAR(M_imbuf_new_doc,
".. function:: new(size)\n"
"\n"
" Load a new image.\n"
"\n"
" :arg size: The size of the image in pixels.\n"
" :type size: pair of ints\n"
" :return: the newly loaded image.\n"
" :rtype: :class:`ImBuf`\n");
static PyObject *M_imbuf_new(PyObject * /*self*/, PyObject *args, PyObject *kw)
{
int size[2];
static const char *_keywords[] = {"size", nullptr};
static _PyArg_Parser _parser = {
PY_ARG_PARSER_HEAD_COMPAT()
"(ii)" /* `size` */
":new",
_keywords,
nullptr,
};
if (!_PyArg_ParseTupleAndKeywordsFast(args, kw, &_parser, &size[0], &size[1])) {
return nullptr;
}
if (size[0] <= 0 || size[1] <= 0) {
PyErr_Format(PyExc_ValueError, "new: Image size cannot be below 1 (%d, %d)", UNPACK2(size));
return nullptr;
}
/* TODO: make options. */
const uchar planes = 4;
const uint flags = IB_rect;
ImBuf *ibuf = IMB_allocImBuf(UNPACK2(size), planes, flags);
if (ibuf == nullptr) {
PyErr_Format(PyExc_ValueError, "new: Unable to create image (%d, %d)", UNPACK2(size));
return nullptr;
}
return Py_ImBuf_CreatePyObject(ibuf);
}
static PyObject *imbuf_load_impl(const char *filepath)
{
const int file = BLI_open(filepath, O_BINARY | O_RDONLY, 0);
if (file == -1) {
PyErr_Format(PyExc_IOError, "load: %s, failed to open file '%s'", strerror(errno), filepath);
return nullptr;
}
ImBuf *ibuf = IMB_loadifffile(file, IB_rect, nullptr, filepath);
close(file);
if (ibuf == nullptr) {
PyErr_Format(
PyExc_ValueError, "load: Unable to recognize image format for file '%s'", filepath);
return nullptr;
}
STRNCPY(ibuf->filepath, filepath);
return Py_ImBuf_CreatePyObject(ibuf);
}
PyDoc_STRVAR(M_imbuf_load_doc,
".. function:: load(filepath)\n"
"\n"
" Load an image from a file.\n"
"\n"
" :arg filepath: the filepath of the image.\n"
" :type filepath: string or bytes\n"
" :return: the newly loaded image.\n"
" :rtype: :class:`ImBuf`\n");
static PyObject *M_imbuf_load(PyObject * /*self*/, PyObject *args, PyObject *kw)
{
PyC_UnicodeAsBytesAndSize_Data filepath_data = {nullptr};
static const char *_keywords[] = {"filepath", nullptr};
static _PyArg_Parser _parser = {
PY_ARG_PARSER_HEAD_COMPAT()
"O&" /* `filepath` */
":load",
_keywords,
nullptr,
};
if (!_PyArg_ParseTupleAndKeywordsFast(
args, kw, &_parser, PyC_ParseUnicodeAsBytesAndSize, &filepath_data))
{
return nullptr;
}
PyObject *result = imbuf_load_impl(filepath_data.value);
Py_XDECREF(filepath_data.value_coerce);
return result;
}
static PyObject *imbuf_write_impl(ImBuf *ibuf, const char *filepath)
{
const bool ok = IMB_saveiff(ibuf, filepath, IB_rect);
if (ok == false) {
PyErr_Format(
PyExc_IOError, "write: Unable to write image file (%s) '%s'", strerror(errno), filepath);
return nullptr;
}
Py_RETURN_NONE;
}
PyDoc_STRVAR(
M_imbuf_write_doc,
".. function:: write(image, filepath=image.filepath)\n"
"\n"
" Write an image.\n"
"\n"
" :arg image: the image to write.\n"
" :type image: :class:`ImBuf`\n"
" :arg filepath: Optional filepath of the image (fallback to the images file path).\n"
" :type filepath: string, bytes or NoneType\n");
static PyObject *M_imbuf_write(PyObject * /*self*/, PyObject *args, PyObject *kw)
{
Py_ImBuf *py_imb;
PyC_UnicodeAsBytesAndSize_Data filepath_data = {nullptr};
static const char *_keywords[] = {"image", "filepath", nullptr};
static _PyArg_Parser _parser = {
PY_ARG_PARSER_HEAD_COMPAT()
"O!" /* `image` */
"|$" /* Optional keyword only arguments. */
"O&" /* `filepath` */
":write",
_keywords,
nullptr,
};
if (!_PyArg_ParseTupleAndKeywordsFast(args,
kw,
&_parser,
&Py_ImBuf_Type,
&py_imb,
PyC_ParseUnicodeAsBytesAndSize_OrNone,
&filepath_data))
{
return nullptr;
}
const char *filepath = filepath_data.value;
if (filepath == nullptr) {
/* Argument omitted, use images path. */
filepath = py_imb->ibuf->filepath;
}
PyObject *result = imbuf_write_impl(py_imb->ibuf, filepath);
Py_XDECREF(filepath_data.value_coerce);
return result;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Module Definition (`imbuf`)
* \{ */
#if (defined(__GNUC__) && !defined(__clang__))
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wcast-function-type"
#endif
static PyMethodDef IMB_methods[] = {
{"new", (PyCFunction)M_imbuf_new, METH_VARARGS | METH_KEYWORDS, M_imbuf_new_doc},
{"load", (PyCFunction)M_imbuf_load, METH_VARARGS | METH_KEYWORDS, M_imbuf_load_doc},
{"write", (PyCFunction)M_imbuf_write, METH_VARARGS | METH_KEYWORDS, M_imbuf_write_doc},
{nullptr, nullptr, 0, nullptr},
};
#if (defined(__GNUC__) && !defined(__clang__))
# pragma GCC diagnostic pop
#endif
PyDoc_STRVAR(IMB_doc,
"This module provides access to Blender's image manipulation API.\n"
"\n"
"It provides access to image buffers outside of Blender's\n"
":class:`bpy.types.Image` data-block context.\n");
static PyModuleDef IMB_module_def = {
/*m_base*/ PyModuleDef_HEAD_INIT,
/*m_name*/ "imbuf",
/*m_doc*/ IMB_doc,
/*m_size*/ 0,
/*m_methods*/ IMB_methods,
/*m_slots*/ nullptr,
/*m_traverse*/ nullptr,
/*m_clear*/ nullptr,
/*m_free*/ nullptr,
};
PyObject *BPyInit_imbuf()
{
PyObject *mod;
PyObject *submodule;
PyObject *sys_modules = PyImport_GetModuleDict();
mod = PyModule_Create(&IMB_module_def);
/* `imbuf.types` */
PyModule_AddObject(mod, "types", (submodule = BPyInit_imbuf_types()));
PyDict_SetItem(sys_modules, PyModule_GetNameObject(submodule), submodule);
return mod;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Module Definition (`imbuf.types`)
*
* `imbuf.types` module, only include this to expose access to `imbuf.types.ImBuf`
* for docs and the ability to use with built-ins such as `isinstance`, `issubclass`.
* \{ */
PyDoc_STRVAR(IMB_types_doc,
"This module provides access to image buffer types.\n"
"\n"
".. note::\n"
"\n"
" Image buffer is also the structure used by :class:`bpy.types.Image`\n"
" ID type to store and manipulate image data at runtime.\n");
static PyModuleDef IMB_types_module_def = {
/*m_base*/ PyModuleDef_HEAD_INIT,
/*m_name*/ "imbuf.types",
/*m_doc*/ IMB_types_doc,
/*m_size*/ 0,
/*m_methods*/ nullptr,
/*m_slots*/ nullptr,
/*m_traverse*/ nullptr,
/*m_clear*/ nullptr,
/*m_free*/ nullptr,
};
PyObject *BPyInit_imbuf_types()
{
PyObject *submodule = PyModule_Create(&IMB_types_module_def);
if (PyType_Ready(&Py_ImBuf_Type) < 0) {
return nullptr;
}
PyModule_AddType(submodule, &Py_ImBuf_Type);
return submodule;
}
/** \} */