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/*
* The Python Imaging Library.
* $Id$
*
*/
/*
This is needed for (at least) Tk 8.4.1, otherwise the signature of
** Tk_PhotoPutBlock changes.
*/
#
define
USE_COMPOSITELESS_PHOTO_PUT_BLOCK
#
include
<
Python.h
>
#
include
<
stdlib.h
>
#
include
"
agg_basics.h
"
#
include
"
_backend_agg.h
"
#
include
"
agg_py_transforms.h
"
extern
"
C
"
{
#
ifdef
__APPLE__
#
ifdef
TK_FRAMEWORK
#
include
<
Tcl/tcl.h
>
#
include
<
Tk/tk.h
>
#
else
#
include
<
tk.h
>
#
endif
#
else
#
include
<
tk.h
>
#
endif
};
typedef
struct
{
PyObject_HEAD
Tcl_Interp* interp;
} TkappObject;
static
int
PyAggImagePhoto
(ClientData clientdata, Tcl_Interp* interp,
int
argc,
char
**argv)
{
Tk_PhotoHandle photo;
Tk_PhotoImageBlock block;
PyObject* aggo;
//
vars for blitting
PyObject* bboxo;
bool
has_bbox;
agg::int8u *destbuffer;
double
l,b,r,t;
int
destx, desty, destwidth, destheight, deststride;
long
mode;
long
nval;
if
(
Tk_MainWindow
(interp) ==
NULL
) {
//
Will throw a _tkinter.TclError with "this isn't a Tk application"
return
TCL_ERROR
;
}
if
(argc !=
5
) {
Tcl_AppendResult
(interp,
"
usage:
"
, argv[
0
],
"
destPhoto srcImage
"
, (
char
*)
NULL
);
return
TCL_ERROR
;
}
/*
get Tcl PhotoImage handle
*/
photo =
Tk_FindPhoto
(interp, argv[
1
]);
if
(photo ==
NULL
) {
Tcl_AppendResult
(interp,
"
destination photo must exist
"
, (
char
*)
NULL
);
return
TCL_ERROR
;
}
/*
get array (or object that can be converted to array) pointer
*/
aggo = (PyObject*)
atol
(argv[
2
]);
RendererAgg *aggRenderer = (RendererAgg *)aggo;
int
srcheight = (
int
)aggRenderer->
get_height
();
/*
XXX insert aggRenderer type check
*/
/*
get array mode (0=mono, 1=rgb, 2=rgba)
*/
mode =
atol
(argv[
3
]);
if
((mode !=
0
) && (mode !=
1
) && (mode !=
2
)) {
Tcl_AppendResult
(interp,
"
illegal image mode
"
, (
char
*)
NULL
);
return
TCL_ERROR
;
}
/*
check for bbox/blitting
*/
bboxo = (PyObject*)
atol
(argv[
4
]);
if
(
py_convert_bbox
(bboxo, l, b, r, t)) {
has_bbox =
true
;
destx = (
int
)l;
desty = srcheight-(
int
)t;
destwidth = (
int
)(r-l);
destheight = (
int
)(t-b);
deststride =
4
*destwidth;
destbuffer =
new
agg::int8u[deststride*destheight];
if
(destbuffer ==
NULL
) {
throw
Py::MemoryError
(
"
_tkagg could not allocate memory for destbuffer
"
);
}
agg::rendering_buffer destrbuf;
destrbuf.
attach
(destbuffer, destwidth, destheight, deststride);
pixfmt
destpf
(destrbuf);
renderer_base
destrb
(destpf);
agg::rect_base<
int
>
region
(destx, desty, (
int
)r, srcheight-(
int
)b);
destrb.
copy_from
(*aggRenderer->
renderingBuffer
, ®ion,
-destx, -desty);
}
else
{
has_bbox =
false
;
destbuffer =
NULL
;
destx = desty = destwidth = destheight = deststride =
0
;
}
/*
setup tkblock
*/
block.
pixelSize
=
1
;
if
(mode ==
0
) {
block.
offset
[
0
]= block.
offset
[
1
] = block.
offset
[
2
] =
0
;
nval =
1
;
}
else
{
block.
offset
[
0
] =
0
;
block.
offset
[
1
] =
1
;
block.
offset
[
2
] =
2
;
if
(mode ==
1
) {
block.
offset
[
3
] =
0
;
block.
pixelSize
=
3
;
nval =
3
;
}
else
{
block.
offset
[
3
] =
3
;
block.
pixelSize
=
4
;
nval =
4
;
}
}
if
(has_bbox) {
block.
width
= destwidth;
block.
height
= destheight;
block.
pitch
= deststride;
block.
pixelPtr
= destbuffer;
Tk_PhotoPutBlock
(photo, &block, destx, desty, destwidth, destheight);
delete []
destbuffer;
}
else
{
block.
width
= aggRenderer->
get_width
();
block.
height
= aggRenderer->
get_height
();
block.
pitch
= block.
width
* nval;
block.
pixelPtr
= aggRenderer->
pixBuffer
;
/*
Clear current contents
*/
Tk_PhotoBlank
(photo);
/*
Copy opaque block to photo image, and leave the rest to TK
*/
Tk_PhotoPutBlock
(photo, &block,
0
,
0
, block.
width
, block.
height
);
}
return
TCL_OK
;
}
static
PyObject *
_pyobj_addr
(PyObject* self, PyObject* args)
{
PyObject *pyobj;
if
(!
PyArg_ParseTuple
(args,
"
O
"
, &pyobj))
return
NULL
;
return
Py_BuildValue
(
"
l
"
, (
long
) pyobj);
}
static
PyObject*
_tkinit
(PyObject* self, PyObject* args)
{
Tcl_Interp* interp;
TkappObject* app;
long
arg;
int
is_interp;
if
(!
PyArg_ParseTuple
(args,
"
li
"
, &arg, &is_interp))
return
NULL
;
if
(is_interp) {
interp = (Tcl_Interp*) arg;
}
else
{
/*
Do it the hard way. This will break if the TkappObject
layout changes
*/
app = (TkappObject*) arg;
interp = app->
interp
;
}
/*
This will bomb if interp is invalid...
*/
Tcl_CreateCommand
(interp,
"
PyAggImagePhoto
"
,
(Tcl_CmdProc *) PyAggImagePhoto,
(ClientData)
0
, (Tcl_CmdDeleteProc*)
NULL
);
Py_INCREF
(Py_None);
return
Py_None;
}
static
PyMethodDef functions[] = {
/*
Tkinter interface stuff
*/
{
"
_pyobj_addr
"
, (PyCFunction)_pyobj_addr,
1
},
{
"
tkinit
"
, (PyCFunction)_tkinit,
1
},
{
NULL
,
NULL
}
/*
sentinel
*/
};
extern
"
C
"
DL_EXPORT
(
void
) init_tkagg(
void
)
{
import_array
();
Py_InitModule
(
"
_tkagg
"
, functions);
}
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