[Bf-blender-cvs] [2e5aecf557f] master: Fix T94202: GPUFrameBuffer: wrong refcount in the buffer passed for read_color and read_depth

[Germano Cavalcante]

Commit: 2e5aecf557fb6bc9fe9c652e692905feb1bde484
Author: Germano Cavalcante
Date:   Tue Jan 18 19:23:08 2022 -0300
Branches: master
https://developer.blender.org/rB2e5aecf557fb6bc9fe9c652e692905feb1bde484

Fix T94202: GPUFrameBuffer: wrong refcount in the buffer passed for read_color and read_depth

The buffer passed as an argument to `GPUFrameBuffer.read_color` is used
in the return of the function and therefore, if not used, its refcount is
decremented.

So be sure to increment the refcount of the already existing objects that
will be used in the return of a function.

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

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

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

diff --git a/source/blender/python/gpu/gpu_py_framebuffer.c b/source/blender/python/gpu/gpu_py_framebuffer.c
index a9347b71723..412fcac02ca 100644
--- a/source/blender/python/gpu/gpu_py_framebuffer.c
+++ b/source/blender/python/gpu/gpu_py_framebuffer.c
@@ -530,6 +530,7 @@ static PyObject *pygpu_framebuffer_read_color(BPyGPUFrameBuffer *self,
       PyErr_SetString(PyExc_BufferError, "the buffer size is smaller than expected");
       return NULL;
     }
+    Py_INCREF(py_buffer);
   }
   else {
     py_buffer = BPyGPU_Buffer_CreatePyObject(
@@ -590,6 +591,7 @@ static PyObject *pygpu_framebuffer_read_depth(BPyGPUFrameBuffer *self,
       PyErr_SetString(PyExc_BufferError, "the buffer size is smaller than expected");
       return NULL;
     }
+    Py_INCREF(py_buffer);
   }
   else {
     py_buffer = BPyGPU_Buffer_CreatePyObject(GPU_DATA_FLOAT, (Py_ssize_t[]){h, w}, 2, NULL);