[Bf-blender-cvs] [132576ebb17] master: gpu.types.Buffer: fill buffer interface with just what is requested

[Germano Cavalcante]

Commit: 132576ebb172e1bc354fdea56e9977438b1d5030
Author: Germano Cavalcante
Date:   Tue Apr 12 22:34:52 2022 -0300
Branches: master
https://developer.blender.org/rB132576ebb172e1bc354fdea56e9977438b1d5030

gpu.types.Buffer: fill buffer interface with just what is requested

Use the `flags` parameter to avoid unnecessary allocations.

===================================================================

M	source/blender/python/gpu/gpu_py_buffer.c

===================================================================

diff --git a/source/blender/python/gpu/gpu_py_buffer.c b/source/blender/python/gpu/gpu_py_buffer.c
index d3f55517ae7..020535d002a 100644
--- a/source/blender/python/gpu/gpu_py_buffer.c
+++ b/source/blender/python/gpu/gpu_py_buffer.c
@@ -604,23 +604,31 @@ static void pygpu_buffer_strides_calc(const eGPUDataFormat format,
 }
 
 /* Here is the buffer interface function */
-static int pygpu_buffer__bf_getbuffer(BPyGPUBuffer *self, Py_buffer *view, int UNUSED(flags))
+static int pygpu_buffer__bf_getbuffer(BPyGPUBuffer *self, Py_buffer *view, int flags)
 {
   if (view == NULL) {
     PyErr_SetString(PyExc_ValueError, "NULL view in getbuffer");
     return -1;
   }
 
+  memset(view, 0, sizeof(*view));
+
   view->obj = (PyObject *)self;
   view->buf = (void *)self->buf.as_void;
   view->len = bpygpu_Buffer_size(self);
   view->readonly = 0;
   view->itemsize = GPU_texture_dataformat_size(self->format);
-  view->format = (char *)pygpu_buffer_formatstr(self->format);
-  view->ndim = self->shape_len;
-  view->shape = self->shape;
-  view->strides = MEM_mallocN(view->ndim * sizeof(*view->strides), "BPyGPUBuffer strides");
-  pygpu_buffer_strides_calc(self->format, view->ndim, view->shape, view->strides);
+  if (flags & PyBUF_FORMAT) {
+    view->format = (char *)pygpu_buffer_formatstr(self->format);
+  }
+  if (flags & PyBUF_ND) {
+    view->ndim = self->shape_len;
+    view->shape = self->shape;
+  }
+  if (flags & PyBUF_STRIDES) {
+    view->strides = MEM_mallocN(view->ndim * sizeof(*view->strides), "BPyGPUBuffer strides");
+    pygpu_buffer_strides_calc(self->format, view->ndim, view->shape, view->strides);
+  }
   view->suboffsets = NULL;
   view->internal = NULL;