From 19360c2c1cf50c80b9720137b88db2c2f3626ddc Mon Sep 17 00:00:00 2001 From: Germano Cavalcante Date: Wed, 21 Apr 2021 17:05:44 -0300 Subject: Python GPU Buffer: Add a 'setter' to Buffer.dimensions The attribute `Buffer.dimensions` does not need to be readonly. --- source/blender/python/gpu/gpu_py_buffer.c | 178 +++++++++++++++++++----------- 1 file changed, 114 insertions(+), 64 deletions(-) (limited to 'source/blender') diff --git a/source/blender/python/gpu/gpu_py_buffer.c b/source/blender/python/gpu/gpu_py_buffer.c index d0965e83e33..8ee11ff882c 100644 --- a/source/blender/python/gpu/gpu_py_buffer.c +++ b/source/blender/python/gpu/gpu_py_buffer.c @@ -37,17 +37,92 @@ #include "gpu_py_buffer.h" -// #define PYGPU_BUFFER_PROTOCOL +//#define PYGPU_BUFFER_PROTOCOL +#define MAX_DIMENSIONS 64 /* -------------------------------------------------------------------- */ /** \name Utility Functions * \{ */ -static bool pygpu_buffer_dimensions_compare(int ndim, - const Py_ssize_t *shape_a, - const Py_ssize_t *shape_b) +static Py_ssize_t pygpu_buffer_dimensions_tot_elem(const Py_ssize_t *shape, Py_ssize_t shape_len) { - return (bool)memcmp(shape_a, shape_b, ndim * sizeof(Py_ssize_t)); + Py_ssize_t tot = shape[0]; + for (int i = 1; i < shape_len; i++) { + tot *= shape[i]; + } + + return tot; +} + +static bool pygpu_buffer_dimensions_tot_len_compare(const Py_ssize_t *shape_a, + const Py_ssize_t shape_a_len, + const Py_ssize_t *shape_b, + const Py_ssize_t shape_b_len) +{ + if (pygpu_buffer_dimensions_tot_elem(shape_a, shape_a_len) != + pygpu_buffer_dimensions_tot_elem(shape_b, shape_b_len)) { + PyErr_Format(PyExc_BufferError, "array size does not match"); + return false; + } + + return true; +} + +static bool pygpu_buffer_pyobj_as_shape(PyObject *shape_obj, + Py_ssize_t r_shape[MAX_DIMENSIONS], + Py_ssize_t *r_shape_len) +{ + Py_ssize_t shape_len = 0; + if (PyLong_Check(shape_obj)) { + shape_len = 1; + if (((r_shape[0] = PyLong_AsLong(shape_obj)) < 1)) { + PyErr_SetString(PyExc_AttributeError, "dimension must be greater than or equal to 1"); + return false; + } + } + else if (PySequence_Check(shape_obj)) { + Py_ssize_t shape_len = PySequence_Size(shape_obj); + if (shape_len > MAX_DIMENSIONS) { + PyErr_SetString(PyExc_AttributeError, + "too many dimensions, max is " STRINGIFY(MAX_DIMENSIONS)); + return false; + } + if (shape_len < 1) { + PyErr_SetString(PyExc_AttributeError, "sequence must have at least one dimension"); + return false; + } + + for (int i = 0; i < shape_len; i++) { + PyObject *ob = PySequence_GetItem(shape_obj, i); + if (!PyLong_Check(ob)) { + PyErr_Format(PyExc_TypeError, + "invalid dimension %i, expected an int, not a %.200s", + i, + Py_TYPE(ob)->tp_name); + Py_DECREF(ob); + return false; + } + + r_shape[i] = PyLong_AsLong(ob); + Py_DECREF(ob); + + if (r_shape[i] < 1) { + PyErr_SetString(PyExc_AttributeError, "dimension must be greater than or equal to 1"); + return false; + } + } + + *r_shape_len = shape_len; + } + else { + PyErr_Format(PyExc_TypeError, + "invalid second argument argument expected a sequence " + "or an int, not a %.200s", + Py_TYPE(shape_obj)->tp_name); + } + + *r_shape_len = shape_len; + return true; } static const char *pygpu_buffer_formatstr(eGPUDataFormat data_format) @@ -174,7 +249,7 @@ static PyObject *pygpu_buffer_to_list_recursive(BPyGPUBuffer *self) return list; } -static PyObject *pygpu_buffer_dimensions(BPyGPUBuffer *self, void *UNUSED(arg)) +static PyObject *pygpu_buffer_dimensions_get(BPyGPUBuffer *self, void *UNUSED(arg)) { PyObject *list = PyList_New(self->shape_len); int i; @@ -186,6 +261,30 @@ static PyObject *pygpu_buffer_dimensions(BPyGPUBuffer *self, void *UNUSED(arg)) return list; } +static int pygpu_buffer_dimensions_set(BPyGPUBuffer *self, PyObject *value, void *UNUSED(type)) +{ + Py_ssize_t shape[MAX_DIMENSIONS]; + Py_ssize_t shape_len = 0; + + if (!pygpu_buffer_pyobj_as_shape(value, shape, &shape_len)) { + return -1; + } + + if (!pygpu_buffer_dimensions_tot_len_compare(shape, shape_len, self->shape, self->shape_len)) { + return -1; + } + + size_t size = shape_len * sizeof(*self->shape); + if (shape_len != self->shape_len) { + MEM_freeN(self->shape); + self->shape = MEM_mallocN(size, __func__); + } + + self->shape_len = shape_len; + memcpy(self->shape, shape, size); + return 0; +} + static int pygpu_buffer__tp_traverse(BPyGPUBuffer *self, visitproc visit, void *arg) { Py_VISIT(self->parent); @@ -280,14 +379,13 @@ static int pygpu_buffer_ass_slice(BPyGPUBuffer *self, return err; } -#define MAX_DIMENSIONS 64 static PyObject *pygpu_buffer__tp_new(PyTypeObject *UNUSED(type), PyObject *args, PyObject *kwds) { PyObject *length_ob, *init = NULL; BPyGPUBuffer *buffer = NULL; Py_ssize_t shape[MAX_DIMENSIONS]; - Py_ssize_t i, shape_len = 0; + Py_ssize_t shape_len = 0; if (kwds && PyDict_Size(kwds)) { PyErr_SetString(PyExc_TypeError, "Buffer(): takes no keyword args"); @@ -300,49 +398,7 @@ static PyObject *pygpu_buffer__tp_new(PyTypeObject *UNUSED(type), PyObject *args return NULL; } - if (PyLong_Check(length_ob)) { - shape_len = 1; - if (((shape[0] = PyLong_AsLong(length_ob)) < 1)) { - PyErr_SetString(PyExc_AttributeError, "dimension must be greater than or equal to 1"); - return NULL; - } - } - else if (PySequence_Check(length_ob)) { - shape_len = PySequence_Size(length_ob); - if (shape_len > MAX_DIMENSIONS) { - PyErr_SetString(PyExc_AttributeError, - "too many dimensions, max is " STRINGIFY(MAX_DIMENSIONS)); - return NULL; - } - if (shape_len < 1) { - PyErr_SetString(PyExc_AttributeError, "sequence must have at least one dimension"); - return NULL; - } - - for (i = 0; i < shape_len; i++) { - PyObject *ob = PySequence_GetItem(length_ob, i); - if (!PyLong_Check(ob)) { - PyErr_Format(PyExc_TypeError, - "invalid dimension %i, expected an int, not a %.200s", - i, - Py_TYPE(ob)->tp_name); - Py_DECREF(ob); - return NULL; - } - shape[i] = PyLong_AsLong(ob); - Py_DECREF(ob); - - if (shape[i] < 1) { - PyErr_SetString(PyExc_AttributeError, "dimension must be greater than or equal to 1"); - return NULL; - } - } - } - else { - PyErr_Format(PyExc_TypeError, - "invalid second argument argument expected a sequence " - "or an int, not a %.200s", - Py_TYPE(length_ob)->tp_name); + if (pygpu_buffer_pyobj_as_shape(length_ob, shape, &shape_len) == -1) { return NULL; } @@ -354,11 +410,7 @@ static PyObject *pygpu_buffer__tp_new(PyTypeObject *UNUSED(type), PyObject *args return NULL; } - if (shape_len != pybuffer.ndim || - !pygpu_buffer_dimensions_compare(shape_len, shape, pybuffer.shape)) { - PyErr_Format(PyExc_TypeError, "array size does not match"); - } - else { + if (pygpu_buffer_dimensions_tot_len_compare(shape, shape_len, pybuffer.shape, pybuffer.ndim)) { buffer = pygpu_buffer_make_from_data( init, pygpu_dataformat.value_found, pybuffer.ndim, shape, pybuffer.buf); } @@ -518,7 +570,11 @@ static PyMethodDef pygpu_buffer__tp_methods[] = { }; static PyGetSetDef pygpu_buffer_getseters[] = { - {"dimensions", (getter)pygpu_buffer_dimensions, NULL, NULL, NULL}, + {"dimensions", + (getter)pygpu_buffer_dimensions_get, + (setter)pygpu_buffer_dimensions_set, + NULL, + NULL}, {NULL, NULL, NULL, NULL, NULL}, }; @@ -625,13 +681,7 @@ static size_t pygpu_buffer_calc_size(const int format, const int shape_len, const Py_ssize_t *shape) { - size_t r_size = GPU_texture_dataformat_size(format); - - for (int i = 0; i < shape_len; i++) { - r_size *= shape[i]; - } - - return r_size; + return pygpu_buffer_dimensions_tot_elem(shape, shape_len) * GPU_texture_dataformat_size(format); } size_t bpygpu_Buffer_size(BPyGPUBuffer *buffer) -- cgit v1.2.3