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Convert TkAgg utilities to pybind11 #26992

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Merged
merged 2 commits into from
Nov 20, 2023
Merged

Convert TkAgg utilities to pybind11 #26992

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dd81b66
Convert TkAgg utilities to pybind11
QuLogic Oct 4, 2023
5aeb872
BLD: Check for sufficient MinGW headers when using them
QuLogic Nov 14, 2023
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13 changes: 5 additions & 8 deletions lib/matplotlib/backends/_backend_tk.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
CloseEvent, KeyEvent, LocationEvent, MouseEvent, ResizeEvent)
from matplotlib._pylab_helpers import Gcf
from . import _tkagg
from ._tkagg import TK_PHOTO_COMPOSITE_OVERLAY, TK_PHOTO_COMPOSITE_SET


_log = logging.getLogger(__name__)
Expand Down Expand Up @@ -51,9 +52,6 @@ def _restore_foreground_window_at_end():
# Initialize to a non-empty string that is not a Tcl command
_blit_tcl_name = "mpl_blit_" + uuid.uuid4().hex

TK_PHOTO_COMPOSITE_OVERLAY = 0 # apply transparency rules pixel-wise
TK_PHOTO_COMPOSITE_SET = 1 # set image buffer directly


def _blit(argsid):
"""
Expand All @@ -62,11 +60,11 @@ def _blit(argsid):
*argsid* is a unique string identifier to fetch the correct arguments from
the ``_blit_args`` dict, since arguments cannot be passed directly.
"""
photoimage, dataptr, offsets, bboxptr, comp_rule = _blit_args.pop(argsid)
photoimage, data, offsets, bbox, comp_rule = _blit_args.pop(argsid)
if not photoimage.tk.call("info", "commands", photoimage):
return
_tkagg.blit(photoimage.tk.interpaddr(), str(photoimage), dataptr,
comp_rule, offsets, bboxptr)
_tkagg.blit(photoimage.tk.interpaddr(), str(photoimage), data, comp_rule, offsets,
bbox)


def blit(photoimage, aggimage, offsets, bbox=None):
Expand All @@ -87,7 +85,6 @@ def blit(photoimage, aggimage, offsets, bbox=None):
"""
data = np.asarray(aggimage)
height, width = data.shape[:2]
dataptr = (height, width, data.ctypes.data)
if bbox is not None:
(x1, y1), (x2, y2) = bbox.__array__()
x1 = max(math.floor(x1), 0)
Expand All @@ -109,7 +106,7 @@ def blit(photoimage, aggimage, offsets, bbox=None):

# tkapp.call coerces all arguments to strings, so to avoid string parsing
# within _blit, pack up the arguments into a global data structure.
args = photoimage, dataptr, offsets, bboxptr, comp_rule
args = photoimage, data, offsets, bboxptr, comp_rule
# Need a unique key to avoid thread races.
# Again, make the key a string to avoid string parsing in _blit.
argsid = str(id(args))
Expand Down
15 changes: 15 additions & 0 deletions lib/matplotlib/backends/_tkagg.pyi
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Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
import numpy as np
from numpy.typing import NDArray

TK_PHOTO_COMPOSITE_OVERLAY: int
TK_PHOTO_COMPOSITE_SET: int

def blit(
interp: int,
photo_name: str,
data: NDArray[np.uint8],
comp_rule: int,
offset: tuple[int, int, int, int],
bbox: tuple[int, int, int, int],
) -> None: ...
def enable_dpi_awareness(frame_handle: int, interp: int) -> bool | None: ...
8 changes: 3 additions & 5 deletions lib/matplotlib/tests/test_backend_tk.py
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Original file line number Diff line number Diff line change
Expand Up @@ -81,9 +81,7 @@ def test_blit():

fig, ax = plt.subplots()
photoimage = fig.canvas._tkphoto
data = np.ones((4, 4, 4))
height, width = data.shape[:2]
dataptr = (height, width, data.ctypes.data)
data = np.ones((4, 4, 4), dtype=np.uint8)
# Test out of bounds blitting.
bad_boxes = ((-1, 2, 0, 2),
(2, 0, 0, 2),
Expand All @@ -94,8 +92,8 @@ def test_blit():
for bad_box in bad_boxes:
try:
_tkagg.blit(
photoimage.tk.interpaddr(), str(photoimage), dataptr, 0,
(0, 1, 2, 3), bad_box)
photoimage.tk.interpaddr(), str(photoimage), data,
_tkagg.TK_PHOTO_COMPOSITE_OVERLAY, (0, 1, 2, 3), bad_box)
except ValueError:
print("success")

Expand Down
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