Created
January 28, 2016 07:12
-
-
Save justinfx/bc9a966507211e98cd37 to your computer and use it in GitHub Desktop.
Passing pixel pointer from a Maya MImage to Qt's QImage
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
""" | |
Simplified version of original forum post: | |
http://tech-artists.org/forum/showthread.php?4547-Passing-uchar-pointer-with-PySide-in-Maya | |
""" | |
import ctypes | |
import maya.OpenMaya as om | |
from PySide import QtCore, QtGui | |
# Build a test MImage | |
p = "/path/to/test/image.png" | |
mIm = om.MImage() | |
mIm.readFromFile(p) | |
# Prep MImage | |
mIm.verticalFlip() | |
# Get the width and height | |
wUtil = om.MScriptUtil() | |
wUtil.createFromInt(0) | |
wPtr = wUtil.asUintPtr() | |
hUtil = om.MScriptUtil() | |
hUtil.createFromInt(0) | |
hPtr = hUtil.asUintPtr() | |
mIm.getSize(wPtr, hPtr) | |
width = wUtil.getUint(wPtr) | |
height = hUtil.getUint(hPtr) | |
# byte size | |
imSize = width * height * 4 | |
# pass pointer to QImage | |
buf = ctypes.c_ubyte * imSize | |
buf = buf.from_address(long(mIm.pixels())) | |
qIm = QtGui.QImage(buf, width, height, QtGui.QImage.Format_RGB32).rgbSwapped() | |
# Test | |
pix = QtGui.QPixmap.fromImage(qIm) | |
l = QtGui.QLabel() | |
l.setPixmap(pix) | |
l.setScaledContents(True) | |
l.resize(640,480) | |
l.show() |
Re-discovered this just now when capturing the viewport into a QLabel, stellar stuff still in 2020!
import ctypes
from PySide2 import QtGui, QtWidgets, QtCore
from maya.api import OpenMaya as om, OpenMayaUI as omui
image = om.MImage()
view = omui.M3dView.active3dView()
view.readColorBuffer(image, True)
image.verticalFlip()
size = image.getSize()
buf = ctypes.c_ubyte * size[0] * size[1]
buf = buf.from_address(long(image.pixels()))
qimage = QtGui.QImage(
buf, size[0], size[1], QtGui.QImage.Format_RGB32
).rgbSwapped()
qpixmap = QtGui.QPixmap.fromImage(qimage)
qlabel = QtWidgets.QLabel()
qlabel.setPixmap(qpixmap)
qlabel.show()
@mottosso I don't even remember saving this! Guess it pays to just document everything incase someone can find it in a search result later.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Dude....I found your other gist that created a custom model panel with paneLayout into Qt. Almost got me there with the pointers to the pane but I was unable to resize the image correctly. After stumbling into MImage I then found this and helped me finish the job!
Thanks man, always good following your work.