diff options
| -rw-r--r-- | doc/python_api/rst/bgl.rst | 41 | ||||
| -rw-r--r-- | source/blender/python/generic/bgl.c | 30 |
2 files changed, 45 insertions, 26 deletions
diff --git a/doc/python_api/rst/bgl.rst b/doc/python_api/rst/bgl.rst index 743f1c33e27..76b7442f2c5 100644 --- a/doc/python_api/rst/bgl.rst +++ b/doc/python_api/rst/bgl.rst @@ -1379,14 +1379,15 @@ OpenGL}" and the online NeHe tutorials are two of the best resources. .. code-block:: python - import Blender - from Blender.BGL import * + import bgl xval, yval= 100, 40 # Get the scale of the view matrix - viewMatrix = Buffer(GL_FLOAT, 16) - glGetFloatv(GL_MODELVIEW_MATRIX, viewMatrix) - f = 1/viewMatrix[0] - glRasterPos2f(xval*f, yval*f) # Instead of the usual glRasterPos2i(xval, yval) + view_matrix = bgl.Buffer(bgl.GL_FLOAT, 16) + bgl.glGetFloatv(bgl.GL_MODELVIEW_MATRIX, view_matrix) + f = 1.0 / view_matrix[0] + + # Instead of the usual glRasterPos2i(xval, yval) + bgl.glRasterPos2f(xval * f, yval * f) .. function:: glReadBuffer(mode): @@ -1839,32 +1840,32 @@ class Buffer: The Buffer object is simply a block of memory that is delineated and initialized by the user. Many OpenGL functions return data to a C-style pointer, however, because this is not possible in python the Buffer object can be used to this end. Wherever pointer - notation is used in the OpenGL functions the Buffer object can be used in it's BGL + notation is used in the OpenGL functions the Buffer object can be used in it's bgl wrapper. In some instances the Buffer object will need to be initialized with the template parameter, while in other instances the user will want to create just a blank buffer which will be zeroed by default. - Example with Buffer:: - import Blender - from Blender import BGL - myByteBuffer = BGL.Buffer(BGL.GL_BYTE, [32,32]) - BGL.glGetPolygonStipple(myByteBuffer) - print myByteBuffer.dimensions - print myByteBuffer.list + .. code-block:: python + + import bgl + myByteBuffer = bgl.Buffer(bgl.GL_BYTE, [32, 32]) + bgl.glGetPolygonStipple(myByteBuffer) + print(myByteBuffer.dimensions) + print(myByteBuffer.to_list()) sliceBuffer = myByteBuffer[0:16] - print sliceBuffer + print(sliceBuffer) - .. attribute:: list + .. attribute:: dimensions - The contents of the Buffer. + The number of dimensions of the Buffer. - .. attribute:: dimensions + .. method:: to_list() - The size of the Buffer. + The contents of the Buffer as a python list. .. method:: __init__(type, dimensions, template = None): - This will create a new Buffer object for use with other BGL OpenGL commands. + This will create a new Buffer object for use with other bgl OpenGL commands. Only the type of argument to store in the buffer and the dimensions of the buffer are necessary. Buffers are zeroed by default unless a template is supplied, in which case the buffer is initialized to the template. diff --git a/source/blender/python/generic/bgl.c b/source/blender/python/generic/bgl.c index 7d939a46021..1891e13fdc1 100644 --- a/source/blender/python/generic/bgl.c +++ b/source/blender/python/generic/bgl.c @@ -72,6 +72,7 @@ static void Buffer_dealloc(PyObject *self); static PyObject *Buffer_tolist(PyObject *self, void *arg); static PyObject *Buffer_dimensions(PyObject *self, void *arg); static PyObject *Buffer_repr(PyObject *self); +static PyMethodDef Buffer_methods[]; static PyGetSetDef Buffer_getseters[]; PyTypeObject BGL_bufferType = { @@ -123,7 +124,7 @@ PyTypeObject BGL_bufferType = { NULL, /* getiterfunc tp_iter; */ NULL, /* iternextfunc tp_iternext; */ /*** Attribute descriptor and subclassing stuff ***/ - NULL, /* struct PyMethodDef *tp_methods; */ + Buffer_methods, /* struct PyMethodDef *tp_methods; */ NULL, /* struct PyMemberDef *tp_members; */ Buffer_getseters, /* struct PyGetSetDef *tp_getset; */ NULL, /*tp_base*/ @@ -459,7 +460,7 @@ static void Buffer_dealloc(PyObject *self) PyObject_DEL(self); } -static PyObject *Buffer_tolist(PyObject *self, void *UNUSED(arg)) +static PyObject *Buffer_to_list(PyObject *self) { int i, len= ((Buffer *)self)->dimensions[0]; PyObject *list= PyList_New(len); @@ -484,18 +485,35 @@ static PyObject *Buffer_dimensions(PyObject *self, void *UNUSED(arg)) return list; } +static PyMethodDef Buffer_methods[] = { + {"to_list", (PyCFunction)Buffer_to_list, METH_NOARGS, + "return the buffer as a list"}, + {NULL, NULL, 0, NULL} +}; + static PyGetSetDef Buffer_getseters[] = { - {(char *)"list", (getter)Buffer_tolist, NULL, NULL, NULL}, {(char *)"dimensions", (getter)Buffer_dimensions, NULL, NULL, NULL}, {NULL, NULL, NULL, NULL, NULL} }; static PyObject *Buffer_repr(PyObject *self) { - PyObject *list= Buffer_tolist(self, NULL); - PyObject *repr= PyObject_Repr(list); + PyObject *list= Buffer_to_list(self); + PyObject *repr; + const char *typestr= "UNKNOWN"; + Buffer *buffer= (Buffer *)self; + + switch(buffer->type) { + case GL_BYTE: typestr= "GL_BYTE"; break; + case GL_SHORT: typestr= "GL_SHORT"; break; + case GL_INT: typestr= "GL_BYTE"; break; + case GL_FLOAT: typestr= "GL_FLOAT"; break; + case GL_DOUBLE: typestr= "GL_DOUBLE"; break; + } + + repr= PyUnicode_FromFormat("Buffer(%s, %R)", typestr, list); Py_DECREF(list); - + return repr; } |