Skip to content
Navigation Menu
{{ message }}
forked from matplotlib/matplotlib
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy path_tkagg.cpp
More file actions
496 lines (438 loc) · 14.3 KB
/
Copy path_tkagg.cpp
File metadata and controls
496 lines (438 loc) · 14.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
/* -*- mode: c++; c-basic-offset: 4 -*- */
/*
* This code is derived from The Python Imaging Library and is covered
* by the PIL license.
*
* See LICENSE/LICENSE.PIL for details.
*
*/
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <cstdlib>
#include <cstdio>
#include <sstream>
#include <agg_basics.h> // agg:int8u
#ifdef _WIN32
#include <windows.h>
#endif
// Include our own excerpts from the Tcl / Tk headers
#include "_tkmini.h"
#include "py_converters.h"
#if defined(_MSC_VER)
# define IMG_FORMAT "%d %d %Iu"
#else
# define IMG_FORMAT "%d %d %zu"
#endif
#define BBOX_FORMAT "%f %f %f %f"
typedef struct
{
PyObject_HEAD
Tcl_Interp *interp;
} TkappObject;
// Global vars for Tcl / Tk functions. We load these symbols from the tkinter
// extension module or loaded Tcl / Tk libraries at run-time.
static Tcl_CreateCommand_t TCL_CREATE_COMMAND;
static Tcl_AppendResult_t TCL_APPEND_RESULT;
static Tk_MainWindow_t TK_MAIN_WINDOW;
static Tk_FindPhoto_t TK_FIND_PHOTO;
static Tk_PhotoPutBlock_NoComposite_t TK_PHOTO_PUT_BLOCK_NO_COMPOSITE;
static Tk_PhotoBlank_t TK_PHOTO_BLANK;
static int PyAggImagePhoto(ClientData clientdata, Tcl_Interp *interp, int
argc, char **argv)
{
Tk_PhotoHandle photo;
Tk_PhotoImageBlock block;
// vars for blitting
size_t pdata;
int wdata, hdata, bbox_parse;
float x1, x2, y1, y2;
bool has_bbox;
agg::int8u *destbuffer, *buffer;
int destx, desty, destwidth, destheight, deststride;
long mode;
long nval;
if (TK_MAIN_WINDOW(interp) == NULL) {
// Will throw a _tkinter.TclError with "this isn't a Tk application"
return TCL_ERROR;
}
if (argc != 5) {
TCL_APPEND_RESULT(interp, "usage: ", argv[0], " destPhoto srcImage", (char *)NULL);
return TCL_ERROR;
}
/* get Tcl PhotoImage handle */
photo = TK_FIND_PHOTO(interp, argv[1]);
if (photo == NULL) {
TCL_APPEND_RESULT(interp, "destination photo must exist", (char *)NULL);
return TCL_ERROR;
}
/* get buffer from str which is "height width ptr" */
if (sscanf(argv[2], IMG_FORMAT, &hdata, &wdata, &pdata) != 3) {
TCL_APPEND_RESULT(interp,
"error reading data, expected height width ptr",
(char *)NULL);
return TCL_ERROR;
}
buffer = (agg::int8u*)pdata;
/* get array mode (0=mono, 1=rgb, 2=rgba) */
mode = atol(argv[3]);
if ((mode != 0) && (mode != 1) && (mode != 2)) {
TCL_APPEND_RESULT(interp, "illegal image mode", (char *)NULL);
return TCL_ERROR;
}
/* check for bbox/blitting */
bbox_parse = sscanf(argv[4], BBOX_FORMAT, &x1, &x2, &y1, &y2);
if (bbox_parse == 4) {
has_bbox = true;
}
else if ((bbox_parse == 1) && (x1 == 0)){
has_bbox = false;
} else {
TCL_APPEND_RESULT(interp, "illegal bbox", (char *)NULL);
return TCL_ERROR;
}
if (has_bbox) {
int srcstride = wdata * 4;
destx = (int)x1;
desty = (int)(hdata - y2);
destwidth = (int)(x2 - x1);
destheight = (int)(y2 - y1);
deststride = 4 * destwidth;
try {
destbuffer = new agg::int8u[deststride * destheight];
}
catch (const std::bad_alloc &) {
TCL_APPEND_RESULT(interp, "could not allocate memory", (char *)NULL);
return TCL_ERROR;
}
for (int i = 0; i < destheight; ++i) {
memcpy(destbuffer + (deststride * i),
&buffer[(i + desty) * srcstride + (destx * 4)],
deststride);
}
} else {
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_PHOTO_PUT_BLOCK_NO_COMPOSITE(photo, &block, destx, desty,
destwidth, destheight);
delete[] destbuffer;
} else {
block.width = wdata;
block.height = hdata;
block.pitch = (int)block.width * nval;
block.pixelPtr = buffer;
/* Clear current contents */
TK_PHOTO_BLANK(photo);
/* Copy opaque block to photo image, and leave the rest to TK */
TK_PHOTO_PUT_BLOCK_NO_COMPOSITE(photo, &block, 0, 0, block.width,
block.height);
}
return TCL_OK;
}
static PyObject *_tkinit(PyObject *self, PyObject *args)
{
Tcl_Interp *interp;
TkappObject *app;
PyObject *arg;
int is_interp;
if (!PyArg_ParseTuple(args, "Oi", &arg, &is_interp)) {
return NULL;
}
if (is_interp) {
interp = (Tcl_Interp *)PyLong_AsVoidPtr(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_CREATE_COMMAND(interp,
"PyAggImagePhoto",
(Tcl_CmdProc *)PyAggImagePhoto,
(ClientData)0,
(Tcl_CmdDeleteProc *)NULL);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *mpl_tk_blit(PyObject *self, PyObject *args)
{
Tcl_Interp *interp;
char const *photo_name;
int height, width;
unsigned char *data_ptr;
int o0, o1, o2, o3;
int x1, x2, y1, y2;
Tk_PhotoHandle photo;
Tk_PhotoImageBlock block;
if (!PyArg_ParseTuple(args, "O&s(iiO&)(iiii)(iiii):blit",
convert_voidptr, &interp, &photo_name,
&height, &width, convert_voidptr, &data_ptr,
&o0, &o1, &o2, &o3,
&x1, &x2, &y1, &y2)) {
goto exit;
}
if (!(photo = TK_FIND_PHOTO(interp, photo_name))) {
PyErr_SetString(PyExc_ValueError, "Failed to extract Tk_PhotoHandle");
goto exit;
}
block.pixelPtr = data_ptr + 4 * ((height - y2) * width + x1);
block.width = x2 - x1;
block.height = y2 - y1;
block.pitch = 4 * width;
block.pixelSize = 4;
block.offset[0] = o0;
block.offset[1] = o1;
block.offset[2] = o2;
block.offset[3] = o3;
TK_PHOTO_PUT_BLOCK_NO_COMPOSITE(
photo, &block, x1, height - y2, x2 - x1, y2 - y1);
exit:
if (PyErr_Occurred()) {
return NULL;
} else {
Py_RETURN_NONE;
}
}
#ifdef _WIN32
static PyObject *
Win32_GetForegroundWindow(PyObject *module, PyObject *args)
{
HWND handle = GetForegroundWindow();
if (!PyArg_ParseTuple(args, ":GetForegroundWindow")) {
return NULL;
}
return PyLong_FromSize_t((size_t)handle);
}
static PyObject *
Win32_SetForegroundWindow(PyObject *module, PyObject *args)
{
HWND handle;
if (!PyArg_ParseTuple(args, "n:SetForegroundWindow", &handle)) {
return NULL;
}
if (!SetForegroundWindow(handle)) {
return PyErr_Format(PyExc_RuntimeError, "Error setting window");
}
Py_INCREF(Py_None);
return Py_None;
}
#endif
static PyMethodDef functions[] = {
/* Tkinter interface stuff */
{ "tkinit", (PyCFunction)_tkinit, METH_VARARGS },
{ "blit", (PyCFunction)mpl_tk_blit, METH_VARARGS },
#ifdef _WIN32
{ "Win32_GetForegroundWindow", (PyCFunction)Win32_GetForegroundWindow, METH_VARARGS },
{ "Win32_SetForegroundWindow", (PyCFunction)Win32_SetForegroundWindow, METH_VARARGS },
#endif
{ NULL, NULL } /* sentinel */
};
// Functions to fill global TCL / Tk function pointers by dynamic loading
#ifdef _WIN32
/*
* On Windows, we can't load the tkinter module to get the TCL or Tk symbols,
* because Windows does not load symbols into the library name-space of
* importing modules. So, knowing that tkinter has already been imported by
* Python, we scan all modules in the running process for the TCL and Tk
* function names.
*/
#define PSAPI_VERSION 1
#include <psapi.h>
// Must be linked with 'psapi' library
FARPROC _dfunc(HMODULE lib_handle, const char *func_name)
{
// Load function `func_name` from `lib_handle`.
// Set Python exception if we can't find `func_name` in `lib_handle`.
// Returns function pointer or NULL if not present.
char message[100];
FARPROC func = GetProcAddress(lib_handle, func_name);
if (func == NULL) {
sprintf(message, "Cannot load function %s", func_name);
PyErr_SetString(PyExc_RuntimeError, message);
}
return func;
}
int get_tcl(HMODULE hMod)
{
// Try to fill TCL global vars with function pointers. Return 0 for no
// functions found, 1 for all functions found, -1 for some but not all
// functions found.
TCL_CREATE_COMMAND = (Tcl_CreateCommand_t)
GetProcAddress(hMod, "Tcl_CreateCommand");
if (TCL_CREATE_COMMAND == NULL) { // Maybe not TCL module
return 0;
}
TCL_APPEND_RESULT = (Tcl_AppendResult_t) _dfunc(hMod, "Tcl_AppendResult");
return (TCL_APPEND_RESULT == NULL) ? -1 : 1;
}
int get_tk(HMODULE hMod)
{
// Try to fill Tk global vars with function pointers. Return 0 for no
// functions found, 1 for all functions found, -1 for some but not all
// functions found.
TK_MAIN_WINDOW = (Tk_MainWindow_t)
GetProcAddress(hMod, "Tk_MainWindow");
if (TK_MAIN_WINDOW == NULL) { // Maybe not Tk module
return 0;
}
return // -1 if any remaining symbols are NULL
((TK_FIND_PHOTO = (Tk_FindPhoto_t)
_dfunc(hMod, "Tk_FindPhoto")) == NULL) ||
((TK_PHOTO_PUT_BLOCK_NO_COMPOSITE = (Tk_PhotoPutBlock_NoComposite_t)
_dfunc(hMod, "Tk_PhotoPutBlock_NoComposite")) == NULL) ||
((TK_PHOTO_BLANK = (Tk_PhotoBlank_t)
_dfunc(hMod, "Tk_PhotoBlank")) == NULL)
? -1 : 1;
}
void load_tkinter_funcs(void)
{
// Load TCL and Tk functions by searching all modules in current process.
// Sets an error on failure.
HMODULE hMods[1024];
HANDLE hProcess;
DWORD cbNeeded;
unsigned int i;
int found_tcl = 0;
int found_tk = 0;
// Returns pseudo-handle that does not need to be closed
hProcess = GetCurrentProcess();
// Iterate through modules in this process looking for TCL / Tk names
if (EnumProcessModules(hProcess, hMods, sizeof(hMods), &cbNeeded)) {
for (i = 0; i < (cbNeeded / sizeof(HMODULE)); i++) {
if (!found_tcl) {
found_tcl = get_tcl(hMods[i]);
if (found_tcl == -1) {
return;
}
}
if (!found_tk) {
found_tk = get_tk(hMods[i]);
if (found_tk == -1) {
return;
}
}
if (found_tcl && found_tk) {
return;
}
}
}
if (found_tcl == 0) {
PyErr_SetString(PyExc_RuntimeError, "Could not find TCL routines");
} else {
PyErr_SetString(PyExc_RuntimeError, "Could not find Tk routines");
}
return;
}
#else // not Windows
/*
* On Unix, we can get the TCL and Tk symbols from the tkinter module, because
* tkinter uses these symbols, and the symbols are therefore visible in the
* tkinter dynamic library (module).
*/
#include <dlfcn.h>
void *_dfunc(void *lib_handle, const char *func_name)
{
// Load function `func_name` from `lib_handle`.
// Set Python exception if we can't find `func_name` in `lib_handle`.
// Returns function pointer or NULL if not present.
void* func;
// Reset errors.
dlerror();
func = dlsym(lib_handle, func_name);
if (func == NULL) {
PyErr_SetString(PyExc_RuntimeError, dlerror());
}
return func;
}
int _func_loader(void *lib)
{
// Fill global function pointers from dynamic lib.
// Return 1 if any pointer is NULL, 0 otherwise.
return
((TCL_CREATE_COMMAND = (Tcl_CreateCommand_t)
_dfunc(lib, "Tcl_CreateCommand")) == NULL) ||
((TCL_APPEND_RESULT = (Tcl_AppendResult_t)
_dfunc(lib, "Tcl_AppendResult")) == NULL) ||
((TK_MAIN_WINDOW = (Tk_MainWindow_t)
_dfunc(lib, "Tk_MainWindow")) == NULL) ||
((TK_FIND_PHOTO = (Tk_FindPhoto_t)
_dfunc(lib, "Tk_FindPhoto")) == NULL) ||
((TK_PHOTO_PUT_BLOCK_NO_COMPOSITE = (Tk_PhotoPutBlock_NoComposite_t)
_dfunc(lib, "Tk_PhotoPutBlock_NoComposite")) == NULL) ||
((TK_PHOTO_BLANK = (Tk_PhotoBlank_t)
_dfunc(lib, "Tk_PhotoBlank")) == NULL);
}
void load_tkinter_funcs(void)
{
// Load tkinter global funcs from tkinter compiled module.
// Sets an error on failure.
void *main_program, *tkinter_lib;
PyObject *module = NULL, *py_path = NULL, *py_path_b = NULL;
char *path;
// Try loading from the main program namespace first.
main_program = dlopen(NULL, RTLD_LAZY);
if (_func_loader(main_program) == 0) {
goto exit;
}
// Clear exception triggered when we didn't find symbols above.
PyErr_Clear();
// Handle PyPy first, as that import will correctly fail on CPython.
module = PyImport_ImportModule("_tkinter.tklib_cffi"); // PyPy
if (!module) {
PyErr_Clear();
module = PyImport_ImportModule("_tkinter"); // CPython
}
if (!(module &&
(py_path = PyObject_GetAttrString(module, "__file__")) &&
(py_path_b = PyUnicode_EncodeFSDefault(py_path)) &&
(path = PyBytes_AsString(py_path_b)))) {
goto exit;
}
tkinter_lib = dlopen(path, RTLD_LAZY);
if (!tkinter_lib) {
PyErr_SetString(PyExc_RuntimeError, dlerror());
goto exit;
}
_func_loader(tkinter_lib);
// dlclose is safe because tkinter has been imported.
dlclose(tkinter_lib);
goto exit;
exit:
Py_XDECREF(module);
Py_XDECREF(py_path);
Py_XDECREF(py_path_b);
}
#endif // end not Windows
static PyModuleDef _tkagg_module = {
PyModuleDef_HEAD_INIT, "_tkagg", "", -1, functions, NULL, NULL, NULL, NULL
};
PyMODINIT_FUNC PyInit__tkagg(void)
{
load_tkinter_funcs();
return PyErr_Occurred() ? NULL : PyModule_Create(&_tkagg_module);
}
You can’t perform that action at this time.