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PR: Add utility function to get raw bytes from QImages (compat.py) #355

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PR: Add utility function to get raw bytes from QImages (compat.py) #355

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12 changes: 12 additions & 0 deletions qtpy/compat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
PYQT6,
PYSIDE2,
PYSIDE6,
QtBindingsNotFoundError,
)
from .QtWidgets import QFileDialog

Expand Down Expand Up @@ -200,3 +201,14 @@ def isalive(obj):

return shiboken.isValid(obj)
return None


# =============================================================================
def getimagebytes(qimage):
if PYQT5:
return qimage.bits().asstring(qimage.byteCount())
if PYQT6:
return qimage.bits().asstring(qimage.sizeInBytes())
if PYSIDE2 or PYSIDE6:
return qimage.bits().tobytes()
raise QtBindingsNotFoundError
10 changes: 10 additions & 0 deletions qtpy/tests/test_compat.py
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Original file line number Diff line number Diff line change
@@ -1,9 +1,12 @@
"""Test the compat module."""

import sys

import pytest

from qtpy import QtWidgets, compat
from qtpy.QtCore import QRectF, QSize, Qt
from qtpy.QtGui import QBrush, QImage, QPainter
from qtpy.tests.utils import not_using_conda


Expand All @@ -22,3 +25,10 @@ def test_isalive(qtbot):
with qtbot.waitSignal(test_widget.destroyed):
test_widget.deleteLater()
assert compat.isalive(test_widget) is False


def test_getimagebytes(qtbot):
"""Test compat.getimagebytes"""
image = QImage(QSize(100, 100), QImage.Format_RGB32)
_bytes = compat.getimagebytes(image)
assert len(_bytes) == 100 * 100 * 4
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