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matplotlib/src/_backend_agg_wrapper.cpp at v3.7.x · matplotlib/matplotlib · GitHub
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#
include
"
mplutils.h
"
#
include
"
numpy_cpp.h
"
#
include
"
py_converters.h
"
#
include
"
_backend_agg.h
"
typedef
struct
{
PyObject_HEAD
RendererAgg *x;
Py_ssize_t shape[
3
];
Py_ssize_t strides[
3
];
Py_ssize_t suboffsets[
3
];
} PyRendererAgg;
static
PyTypeObject PyRendererAggType;
typedef
struct
{
PyObject_HEAD
BufferRegion *x;
Py_ssize_t shape[
3
];
Py_ssize_t strides[
3
];
Py_ssize_t suboffsets[
3
];
} PyBufferRegion;
static
PyTypeObject PyBufferRegionType;
/*
*********************************************************************
* BufferRegion
*
*/
static
PyObject *
PyBufferRegion_new
(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyBufferRegion *self;
self = (PyBufferRegion *)type->
tp_alloc
(type,
0
);
self->
x
=
NULL
;
return
(PyObject *)self;
}
static
void
PyBufferRegion_dealloc
(PyBufferRegion *self)
{
delete
self->
x
;
Py_TYPE
(self)->
tp_free
((PyObject *)self);
}
static
PyObject *
PyBufferRegion_to_string
(PyBufferRegion *self, PyObject *args)
{
char
const
* msg =
"
BufferRegion.to_string is deprecated since Matplotlib 3.7 and will
"
"
be removed two minor releases later; use np.asarray(region) instead.
"
;
if
(
PyErr_WarnEx
(PyExc_DeprecationWarning, msg,
1
)) {
return
NULL
;
}
return
PyBytes_FromStringAndSize
((
const
char
*)self->
x
->
get_data
(),
(Py_ssize_t) self->
x
->
get_height
() * self->
x
->
get_stride
());
}
/*
TODO: This doesn't seem to be used internally. Remove?
*/
static
PyObject *
PyBufferRegion_set_x
(PyBufferRegion *self, PyObject *args)
{
int
x;
if
(!
PyArg_ParseTuple
(args,
"
i:set_x
"
, &x)) {
return
NULL
;
}
self->
x
->
get_rect
().
x1
= x;
Py_RETURN_NONE;
}
static
PyObject *
PyBufferRegion_set_y
(PyBufferRegion *self, PyObject *args)
{
int
y;
if
(!
PyArg_ParseTuple
(args,
"
i:set_y
"
, &y)) {
return
NULL
;
}
self->
x
->
get_rect
().
y1
= y;
Py_RETURN_NONE;
}
static
PyObject *
PyBufferRegion_get_extents
(PyBufferRegion *self, PyObject *args)
{
agg::rect_i rect = self->
x
->
get_rect
();
return
Py_BuildValue
(
"
IIII
"
, rect.
x1
, rect.
y1
, rect.
x2
, rect.
y2
);
}
static
PyObject *
PyBufferRegion_to_string_argb
(PyBufferRegion *self, PyObject *args)
{
char
const
* msg =
"
BufferRegion.to_string_argb is deprecated since Matplotlib 3.7 and
"
"
will be removed two minor releases later; use
"
"
np.take(region, [2, 1, 0, 3], axis=2) instead.
"
;
if
(
PyErr_WarnEx
(PyExc_DeprecationWarning, msg,
1
)) {
return
NULL
;
}
PyObject *bufobj;
uint8_t
*buf;
Py_ssize_t height, stride;
height = self->
x
->
get_height
();
stride = self->
x
->
get_stride
();
bufobj =
PyBytes_FromStringAndSize
(
NULL
, height * stride);
buf = (
uint8_t
*)
PyBytes_AS_STRING
(bufobj);
CALL_CPP_CLEANUP
(
"
to_string_argb
"
, (self->
x
->
to_string_argb
(buf)),
Py_DECREF
(bufobj));
return
bufobj;
}
int
PyBufferRegion_get_buffer
(PyBufferRegion *self, Py_buffer *buf,
int
flags)
{
Py_INCREF
(self);
buf->
obj
= (PyObject *)self;
buf->
buf
= self->
x
->
get_data
();
buf->
len
= (Py_ssize_t)self->
x
->
get_width
() * (Py_ssize_t)self->
x
->
get_height
() *
4
;
buf->
readonly
=
0
;
buf->
format
= (
char
*)
"
B
"
;
buf->
ndim
=
3
;
self->
shape
[
0
] = self->
x
->
get_height
();
self->
shape
[
1
] = self->
x
->
get_width
();
self->
shape
[
2
] =
4
;
buf->
shape
= self->
shape
;
self->
strides
[
0
] = self->
x
->
get_width
() *
4
;
self->
strides
[
1
] =
4
;
self->
strides
[
2
] =
1
;
buf->
strides
= self->
strides
;
buf->
suboffsets
=
NULL
;
buf->
itemsize
=
1
;
buf->
internal
=
NULL
;
return
1
;
}
static
PyTypeObject *
PyBufferRegion_init_type
()
{
static
PyMethodDef methods[] = {
{
"
to_string
"
, (PyCFunction)PyBufferRegion_to_string,
METH_NOARGS
,
NULL
},
{
"
to_string_argb
"
, (PyCFunction)PyBufferRegion_to_string_argb,
METH_NOARGS
,
NULL
},
{
"
set_x
"
, (PyCFunction)PyBufferRegion_set_x,
METH_VARARGS
,
NULL
},
{
"
set_y
"
, (PyCFunction)PyBufferRegion_set_y,
METH_VARARGS
,
NULL
},
{
"
get_extents
"
, (PyCFunction)PyBufferRegion_get_extents,
METH_NOARGS
,
NULL
},
{
NULL
}
};
static
PyBufferProcs buffer_procs;
buffer_procs.
bf_getbuffer
= (getbufferproc)PyBufferRegion_get_buffer;
PyBufferRegionType.
tp_name
=
"
matplotlib.backends._backend_agg.BufferRegion
"
;
PyBufferRegionType.
tp_basicsize
=
sizeof
(PyBufferRegion);
PyBufferRegionType.
tp_dealloc
= (destructor)PyBufferRegion_dealloc;
PyBufferRegionType.
tp_flags
= Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
PyBufferRegionType.
tp_methods
= methods;
PyBufferRegionType.
tp_new
= PyBufferRegion_new;
PyBufferRegionType.
tp_as_buffer
= &buffer_procs;
return
&PyBufferRegionType;
}
/*
*********************************************************************
* RendererAgg
*
*/
static
PyObject *
PyRendererAgg_new
(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyRendererAgg *self;
self = (PyRendererAgg *)type->
tp_alloc
(type,
0
);
self->
x
=
NULL
;
return
(PyObject *)self;
}
static
int
PyRendererAgg_init
(PyRendererAgg *self, PyObject *args, PyObject *kwds)
{
unsigned
int
width;
unsigned
int
height;
double
dpi;
int
debug =
0
;
if
(!
PyArg_ParseTuple
(args,
"
IId|i:RendererAgg
"
, &width, &height, &dpi, &debug)) {
return
-
1
;
}
if
(dpi <=
0.0
) {
PyErr_SetString
(PyExc_ValueError,
"
dpi must be positive
"
);
return
-
1
;
}
if
(width >=
1
<<
16
|| height >=
1
<<
16
) {
PyErr_Format
(
PyExc_ValueError,
"
Image size of %dx%d pixels is too large.
"
"
It must be less than 2^16 in each direction.
"
,
width, height);
return
-
1
;
}
CALL_CPP_INIT
(
"
RendererAgg
"
, self->
x
=
new
RendererAgg
(width, height, dpi))
return
0
;
}
static
void
PyRendererAgg_dealloc
(PyRendererAgg *self)
{
delete
self->
x
;
Py_TYPE
(self)->
tp_free
((PyObject *)self);
}
static
PyObject *
PyRendererAgg_draw_path
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
py::PathIterator path;
agg::trans_affine trans;
PyObject *faceobj =
NULL
;
agg::rgba face;
if
(!
PyArg_ParseTuple
(args,
"
O&O&O&|O:draw_path
"
,
&convert_gcagg,
&gc,
&convert_path,
&path,
&convert_trans_affine,
&trans,
&faceobj)) {
return
NULL
;
}
if
(!
convert_face
(faceobj, gc, &face)) {
return
NULL
;
}
CALL_CPP
(
"
draw_path
"
, (self->
x
->
draw_path
(gc, path, trans, face)));
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_draw_text_image
(PyRendererAgg *self, PyObject *args)
{
numpy::array_view<agg::int8u,
2
> image;
double
x;
double
y;
double
angle;
GCAgg gc;
if
(!
PyArg_ParseTuple
(args,
"
O&dddO&:draw_text_image
"
,
&image.
converter_contiguous
,
&image,
&x,
&y,
&angle,
&convert_gcagg,
&gc)) {
return
NULL
;
}
CALL_CPP
(
"
draw_text_image
"
, (self->
x
->
draw_text_image
(gc, image, x, y, angle)));
Py_RETURN_NONE;
}
PyObject *
PyRendererAgg_draw_markers
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
py::PathIterator marker_path;
agg::trans_affine marker_path_trans;
py::PathIterator path;
agg::trans_affine trans;
PyObject *faceobj =
NULL
;
agg::rgba face;
if
(!
PyArg_ParseTuple
(args,
"
O&O&O&O&O&|O:draw_markers
"
,
&convert_gcagg,
&gc,
&convert_path,
&marker_path,
&convert_trans_affine,
&marker_path_trans,
&convert_path,
&path,
&convert_trans_affine,
&trans,
&faceobj)) {
return
NULL
;
}
if
(!
convert_face
(faceobj, gc, &face)) {
return
NULL
;
}
CALL_CPP
(
"
draw_markers
"
,
(self->
x
->
draw_markers
(gc, marker_path, marker_path_trans, path, trans, face)));
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_draw_image
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
double
x;
double
y;
numpy::array_view<agg::int8u,
3
> image;
if
(!
PyArg_ParseTuple
(args,
"
O&ddO&:draw_image
"
,
&convert_gcagg,
&gc,
&x,
&y,
&image.
converter_contiguous
,
&image)) {
return
NULL
;
}
x =
mpl_round
(x);
y =
mpl_round
(y);
gc.
alpha
=
1.0
;
CALL_CPP
(
"
draw_image
"
, (self->
x
->
draw_image
(gc, x, y, image)));
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_draw_path_collection
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
agg::trans_affine master_transform;
py::PathGenerator paths;
numpy::array_view<
const
double
,
3
> transforms;
numpy::array_view<
const
double
,
2
> offsets;
agg::trans_affine offset_trans;
numpy::array_view<
const
double
,
2
> facecolors;
numpy::array_view<
const
double
,
2
> edgecolors;
numpy::array_view<
const
double
,
1
> linewidths;
DashesVector dashes;
numpy::array_view<
const
uint8_t
,
1
> antialiaseds;
PyObject *ignored;
PyObject *offset_position;
//
offset position is no longer used
if
(!
PyArg_ParseTuple
(args,
"
O&O&O&O&O&O&O&O&O&O&O&OO:draw_path_collection
"
,
&convert_gcagg,
&gc,
&convert_trans_affine,
&master_transform,
&convert_pathgen,
&paths,
&convert_transforms,
&transforms,
&convert_points,
&offsets,
&convert_trans_affine,
&offset_trans,
&convert_colors,
&facecolors,
&convert_colors,
&edgecolors,
&linewidths.
converter
,
&linewidths,
&convert_dashes_vector,
&dashes,
&antialiaseds.
converter
,
&antialiaseds,
&ignored,
&offset_position)) {
return
NULL
;
}
CALL_CPP
(
"
draw_path_collection
"
,
(self->
x
->
draw_path_collection
(gc,
master_transform,
paths,
transforms,
offsets,
offset_trans,
facecolors,
edgecolors,
linewidths,
dashes,
antialiaseds)));
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_draw_quad_mesh
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
agg::trans_affine master_transform;
unsigned
int
mesh_width;
unsigned
int
mesh_height;
numpy::array_view<
const
double
,
3
> coordinates;
numpy::array_view<
const
double
,
2
> offsets;
agg::trans_affine offset_trans;
numpy::array_view<
const
double
,
2
> facecolors;
bool
antialiased;
numpy::array_view<
const
double
,
2
> edgecolors;
if
(!
PyArg_ParseTuple
(args,
"
O&O&IIO&O&O&O&O&O&:draw_quad_mesh
"
,
&convert_gcagg,
&gc,
&convert_trans_affine,
&master_transform,
&mesh_width,
&mesh_height,
&coordinates.
converter
,
&coordinates,
&convert_points,
&offsets,
&convert_trans_affine,
&offset_trans,
&convert_colors,
&facecolors,
&convert_bool,
&antialiased,
&convert_colors,
&edgecolors)) {
return
NULL
;
}
CALL_CPP
(
"
draw_quad_mesh
"
,
(self->
x
->
draw_quad_mesh
(gc,
master_transform,
mesh_width,
mesh_height,
coordinates,
offsets,
offset_trans,
facecolors,
antialiased,
edgecolors)));
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_draw_gouraud_triangle
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
numpy::array_view<
const
double
,
2
> points;
numpy::array_view<
const
double
,
2
> colors;
agg::trans_affine trans;
if
(!
PyArg_ParseTuple
(args,
"
O&O&O&O&|O:draw_gouraud_triangle
"
,
&convert_gcagg,
&gc,
&points.
converter
,
&points,
&colors.
converter
,
&colors,
&convert_trans_affine,
&trans)) {
return
NULL
;
}
if
(points.
dim
(
0
) !=
3
|| points.
dim
(
1
) !=
2
) {
PyErr_Format
(PyExc_ValueError,
"
points must be a 3x2 array, got %
"
NPY_INTP_FMT
"
x%
"
NPY_INTP_FMT
,
points.
dim
(
0
), points.
dim
(
1
));
return
NULL
;
}
if
(colors.
dim
(
0
) !=
3
|| colors.
dim
(
1
) !=
4
) {
PyErr_Format
(PyExc_ValueError,
"
colors must be a 3x4 array, got %
"
NPY_INTP_FMT
"
x%
"
NPY_INTP_FMT
,
colors.
dim
(
0
), colors.
dim
(
1
));
return
NULL
;
}
CALL_CPP
(
"
draw_gouraud_triangle
"
, (self->
x
->
draw_gouraud_triangle
(gc, points, colors, trans)));
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_draw_gouraud_triangles
(PyRendererAgg *self, PyObject *args)
{
GCAgg gc;
numpy::array_view<
const
double
,
3
> points;
numpy::array_view<
const
double
,
3
> colors;
agg::trans_affine trans;
if
(!
PyArg_ParseTuple
(args,
"
O&O&O&O&|O:draw_gouraud_triangles
"
,
&convert_gcagg,
&gc,
&points.
converter
,
&points,
&colors.
converter
,
&colors,
&convert_trans_affine,
&trans)) {
return
NULL
;
}
if
(points.
size
() !=
0
&& (points.
dim
(
1
) !=
3
|| points.
dim
(
2
) !=
2
)) {
PyErr_Format
(PyExc_ValueError,
"
points must be a Nx3x2 array, got %
"
NPY_INTP_FMT
"
x%
"
NPY_INTP_FMT
"
x%
"
NPY_INTP_FMT
,
points.
dim
(
0
), points.
dim
(
1
), points.
dim
(
2
));
return
NULL
;
}
if
(colors.
size
() !=
0
&& (colors.
dim
(
1
) !=
3
|| colors.
dim
(
2
) !=
4
)) {
PyErr_Format
(PyExc_ValueError,
"
colors must be a Nx3x4 array, got %
"
NPY_INTP_FMT
"
x%
"
NPY_INTP_FMT
"
x%
"
NPY_INTP_FMT
,
colors.
dim
(
0
), colors.
dim
(
1
), colors.
dim
(
2
));
return
NULL
;
}
if
(points.
size
() != colors.
size
()) {
PyErr_Format
(PyExc_ValueError,
"
points and colors arrays must be the same length, got %
"
NPY_INTP_FMT
"
and %
"
NPY_INTP_FMT
,
points.
dim
(
0
), colors.
dim
(
0
));
return
NULL
;
}
CALL_CPP
(
"
draw_gouraud_triangles
"
, self->
x
->
draw_gouraud_triangles
(gc, points, colors, trans));
Py_RETURN_NONE;
}
int
PyRendererAgg_get_buffer
(PyRendererAgg *self, Py_buffer *buf,
int
flags)
{
Py_INCREF
(self);
buf->
obj
= (PyObject *)self;
buf->
buf
= self->
x
->
pixBuffer
;
buf->
len
= (Py_ssize_t)self->
x
->
get_width
() * (Py_ssize_t)self->
x
->
get_height
() *
4
;
buf->
readonly
=
0
;
buf->
format
= (
char
*)
"
B
"
;
buf->
ndim
=
3
;
self->
shape
[
0
] = self->
x
->
get_height
();
self->
shape
[
1
] = self->
x
->
get_width
();
self->
shape
[
2
] =
4
;
buf->
shape
= self->
shape
;
self->
strides
[
0
] = self->
x
->
get_width
() *
4
;
self->
strides
[
1
] =
4
;
self->
strides
[
2
] =
1
;
buf->
strides
= self->
strides
;
buf->
suboffsets
=
NULL
;
buf->
itemsize
=
1
;
buf->
internal
=
NULL
;
return
1
;
}
static
PyObject *
PyRendererAgg_clear
(PyRendererAgg *self, PyObject *args)
{
CALL_CPP
(
"
clear
"
, self->
x
->
clear
());
Py_RETURN_NONE;
}
static
PyObject *
PyRendererAgg_copy_from_bbox
(PyRendererAgg *self, PyObject *args)
{
agg::rect_d bbox;
BufferRegion *reg;
PyObject *regobj;
if
(!
PyArg_ParseTuple
(args,
"
O&:copy_from_bbox
"
, &convert_rect, &bbox)) {
return
0
;
}
CALL_CPP
(
"
copy_from_bbox
"
, (reg = self->
x
->
copy_from_bbox
(bbox)));
regobj =
PyBufferRegion_new
(&PyBufferRegionType,
NULL
,
NULL
);
((PyBufferRegion *)regobj)->
x
= reg;
return
regobj;
}
static
PyObject *
PyRendererAgg_restore_region
(PyRendererAgg *self, PyObject *args)
{
PyBufferRegion *regobj;
int
xx1 =
0
, yy1 =
0
, xx2 =
0
, yy2 =
0
, x =
0
, y =
0
;
if
(!
PyArg_ParseTuple
(args,
"
O!|iiiiii:restore_region
"
,
&PyBufferRegionType,
®obj,
&xx1,
&yy1,
&xx2,
&yy2,
&x,
&y)) {
return
0
;
}
if
(
PySequence_Size
(args) ==
1
) {
CALL_CPP
(
"
restore_region
"
, self->
x
->
restore_region
(*(regobj->
x
)));
}
else
{
CALL_CPP
(
"
restore_region
"
, self->
x
->
restore_region
(*(regobj->
x
), xx1, yy1, xx2, yy2, x, y));
}
Py_RETURN_NONE;
}
static
PyTypeObject *
PyRendererAgg_init_type
()
{
static
PyMethodDef methods[] = {
{
"
draw_path
"
, (PyCFunction)PyRendererAgg_draw_path,
METH_VARARGS
,
NULL
},
{
"
draw_markers
"
, (PyCFunction)PyRendererAgg_draw_markers,
METH_VARARGS
,
NULL
},
{
"
draw_text_image
"
, (PyCFunction)PyRendererAgg_draw_text_image,
METH_VARARGS
,
NULL
},
{
"
draw_image
"
, (PyCFunction)PyRendererAgg_draw_image,
METH_VARARGS
,
NULL
},
{
"
draw_path_collection
"
, (PyCFunction)PyRendererAgg_draw_path_collection,
METH_VARARGS
,
NULL
},
{
"
draw_quad_mesh
"
, (PyCFunction)PyRendererAgg_draw_quad_mesh,
METH_VARARGS
,
NULL
},
{
"
draw_gouraud_triangle
"
, (PyCFunction)PyRendererAgg_draw_gouraud_triangle,
METH_VARARGS
,
NULL
},
{
"
draw_gouraud_triangles
"
, (PyCFunction)PyRendererAgg_draw_gouraud_triangles,
METH_VARARGS
,
NULL
},
{
"
clear
"
, (PyCFunction)PyRendererAgg_clear,
METH_NOARGS
,
NULL
},
{
"
copy_from_bbox
"
, (PyCFunction)PyRendererAgg_copy_from_bbox,
METH_VARARGS
,
NULL
},
{
"
restore_region
"
, (PyCFunction)PyRendererAgg_restore_region,
METH_VARARGS
,
NULL
},
{
NULL
}
};
static
PyBufferProcs buffer_procs;
buffer_procs.
bf_getbuffer
= (getbufferproc)PyRendererAgg_get_buffer;
PyRendererAggType.
tp_name
=
"
matplotlib.backends._backend_agg.RendererAgg
"
;
PyRendererAggType.
tp_basicsize
=
sizeof
(PyRendererAgg);
PyRendererAggType.
tp_dealloc
= (destructor)PyRendererAgg_dealloc;
PyRendererAggType.
tp_flags
= Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
PyRendererAggType.
tp_methods
= methods;
PyRendererAggType.
tp_init
= (initproc)PyRendererAgg_init;
PyRendererAggType.
tp_new
= PyRendererAgg_new;
PyRendererAggType.
tp_as_buffer
= &buffer_procs;
return
&PyRendererAggType;
}
static
struct
PyModuleDef
moduledef = { PyModuleDef_HEAD_INIT,
"
_backend_agg
"
};
#
pragma
GCC visibility push(default)
PyMODINIT_FUNC
PyInit__backend_agg
(
void
)
{
import_array
();
PyObject *m;
if
(!(m =
PyModule_Create
(&moduledef))
||
prepare_and_add_type
(
PyRendererAgg_init_type
(), m)
//
BufferRegion is not constructible from Python, thus not added to the module.
||
PyType_Ready
(
PyBufferRegion_init_type
())
) {
Py_XDECREF
(m);
return
NULL
;
}
return
m;
}
#
pragma
GCC visibility pop
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