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matplotlib/src/_gtkagg.cpp at master · maahn/matplotlib · GitHub
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/*
-*- mode: c++; c-basic-offset: 4 -*-
*/
#
include
<
vector
>
#
include
<
pygobject.h
>
#
include
<
pygtk/pygtk.h
>
#
include
"
agg_basics.h
"
#
include
"
agg_pixfmt_rgba.h
"
#
include
"
agg_renderer_base.h
"
#
include
"
agg_rendering_buffer.h
"
#
include
"
numpy_cpp.h
"
#
include
"
py_converters.h
"
static
PyObject *
Py_agg_to_gtk_drawable
(PyObject *self, PyObject *args, PyObject *kwds)
{
typedef
agg::pixfmt_rgba32_plain pixfmt;
typedef
agg::renderer_base<pixfmt> renderer_base;
PyGObject *py_drawable;
numpy::array_view<agg::int8u,
3
> buffer;
agg::rect_d rect;
//
args are gc, renderer, bbox where bbox is a transforms BBox
//
(possibly None). If bbox is None, blit the entire agg buffer
//
to gtk. If bbox is not None, blit only the region defined by
//
the bbox
if
(!
PyArg_ParseTuple
(args,
"
OO&O&:agg_to_gtk_drawable
"
,
&py_drawable,
&buffer.
converter
,
&buffer,
&convert_rect,
&rect)) {
return
NULL
;
}
if
(buffer.
dim
(
2
) !=
4
) {
PyErr_SetString
(PyExc_ValueError,
"
Invalid image buffer. Must be NxMx4.
"
);
return
NULL
;
}
GdkDrawable *drawable =
GDK_DRAWABLE
(py_drawable->
obj
);
GdkGC *gc =
gdk_gc_new
(drawable);
int
srcstride = buffer.
dim
(
1
) *
4
;
int
srcwidth = buffer.
dim
(
1
);
int
srcheight = buffer.
dim
(
0
);
//
these three will be overridden below
int
destx =
0
;
int
desty =
0
;
int
destwidth =
1
;
int
destheight =
1
;
int
deststride =
1
;
std::vector<agg::int8u> destbuffer;
agg::int8u *destbufferptr;
if
(rect.
x1
==
0.0
&& rect.
x2
==
0.0
&& rect.
y1
==
0.0
&& rect.
y2
==
0.0
) {
//
bbox is None; copy the entire image
destbufferptr = (agg::int8u *)buffer.
data
();
destwidth = srcwidth;
destheight = srcheight;
deststride = srcstride;
}
else
{
destx = (
int
)rect.
x1
;
desty = srcheight - (
int
)rect.
y2
;
destwidth = (
int
)(rect.
x2
- rect.
x1
);
destheight = (
int
)(rect.
y2
- rect.
y1
);
deststride = destwidth *
4
;
destbuffer.
reserve
(destheight * deststride);
destbufferptr = &destbuffer[
0
];
agg::rendering_buffer destrbuf;
destrbuf.
attach
(destbufferptr, destwidth, destheight, deststride);
pixfmt
destpf
(destrbuf);
renderer_base
destrb
(destpf);
agg::rendering_buffer srcrbuf;
srcrbuf.
attach
((agg::int8u *)buffer.
data
(), buffer.
dim
(
1
), buffer.
dim
(
0
), buffer.
dim
(
1
) *
4
);
agg::rect_base<
int
>
region
(destx, desty, (
int
)rect.
x2
, srcheight - (
int
)rect.
y1
);
destrb.
copy_from
(srcrbuf, ®ion, -destx, -desty);
}
gdk_draw_rgb_32_image
(drawable,
gc,
destx,
desty,
destwidth,
destheight,
GDK_RGB_DITHER_NORMAL
,
destbufferptr,
deststride);
gdk_gc_destroy
(gc);
Py_RETURN_NONE;
}
static
PyMethodDef module_methods[] = {
{
"
agg_to_gtk_drawable
"
, (PyCFunction)Py_agg_to_gtk_drawable,
METH_VARARGS
,
NULL
},
NULL
};
extern
"
C
"
{
#
if
PY3K
static
struct
PyModuleDef
moduledef = {
PyModuleDef_HEAD_INIT,
"
_gtkagg
"
,
NULL
,
0
,
module_methods,
NULL
,
NULL
,
NULL
,
NULL
};
#
define
INITERROR
return
NULL
PyMODINIT_FUNC
PyInit__gtkagg
(
void
)
#
else
#
define
INITERROR
return
PyMODINIT_FUNC
init_gtkagg
(
void
)
#
endif
{
PyObject *m;
#
if
PY3K
m =
PyModule_Create
(&moduledef);
#
else
m =
Py_InitModule3
(
"
_gtkagg
"
, module_methods,
NULL
);
#
endif
if
(m ==
NULL
) {
INITERROR
;
}
init_pygobject
();
init_pygtk
();
import_array
();
#
if
PY3K
return
m;
#
endif
}
}
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