Bug 90 – Allow buffer objects to be passed instead of strings

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Bug 90 - Allow buffer objects to be passed instead of strings

Summary:

Allow buffer objects to be passed instead of strings

Status:	CLOSED FIXED

Product:	PySide
Classification:	Unclassified
Component:	BoostPythonGenerator
Version:	HEAD
Platform:	All All

Importance:	P5 enhancement
Assigned To:	renato filho

URL:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2009-11-03 12:22 EET by Stefan van der Walt
Modified:	2010-03-24 16:29 EET (History)
CC List:	5 users (show)

See Also:

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Description Stefan van der Walt 2009-11-03 12:22:12 EET

It is often useful to pass a buffer instead of a string, for example:

a = np.asarray(np.ones((15, 15, 3))*255, dtype=np.uint8)

from PySide.QtCore import QByteArray
from PySide.QtGui import QImage

img = QImage(15, 15, QImage.Format_RGB888)
img.fromData(a.data)


This is explicitly supported by Sip:

http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/pyqt4ref.html#support-for-python-s-buffer-interfaceimport
numpy as np

Comment 1 Stefan van der Walt 2009-11-03 12:23:37 EET

Fixed code snippet:

import numpy as np
from PyQt4.QtGui import QImage

a = np.asarray(np.ones((15, 15, 3)) * 255, dtype=np.uint8)

img = QImage(15, 15, QImage.Format_RGB888)
img.fromData(a.data)

Comment 2 renato filho 2010-01-19 15:40:46 EET

fixed on commit: 20efa517c31a9339f7be5e7d6d8a13b6ee6214a4