ASCEE/pyqtgraph
5
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge pull request #503 from kiwi0fruit/patch-1

Browse Source 
Fix bug in RawImageWidget.py
This commit is contained in:
Ogi Moore 2020-06-09 20:50:58 -07:00 committed by GitHub
commit 26d54e7cc0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 54 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

91
pyqtgraph/widgets/RawImageWidget.py
View File

@ -1,32 +1,43 @@
# -*- coding: utf-8 -*-
"""
RawImageWidget.py
Copyright 2010-2016 Luke Campagnola
Distributed under MIT/X11 license. See license.txt for more infomation.
"""
from ..Qt import QtCore, QtGui
try:
from ..Qt import QtOpenGL
from OpenGL.GL import *
HAVE_OPENGL = True
except Exception:
except (ImportError, AttributeError):
# Would prefer `except ImportError` here, but some versions of pyopengl generate
# AttributeError upon import
HAVE_OPENGL = False
from .. import functions as fn
import numpy as np
from .. import getConfigOption, functions as fn
class RawImageWidget(QtGui.QWidget):
"""
Widget optimized for very fast video display.
Widget optimized for very fast video display.
Generally using an ImageItem inside GraphicsView is fast enough.
On some systems this may provide faster video. See the VideoSpeedTest example for benchmarking.
"""
def __init__(self, parent=None, scaled=False):
"""
Setting scaled=True will cause the entire image to be displayed within the boundaries of the widget. This also greatly reduces the speed at which it will draw frames.
Setting scaled=True will cause the entire image to be displayed within the boundaries of the widget.
This also greatly reduces the speed at which it will draw frames.
"""
QtGui.QWidget.__init__(self, parent=None)
self.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding,QtGui.QSizePolicy.Expanding))
QtGui.QWidget.__init__(self, parent)
self.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding))
self.scaled = scaled
self.opts = None
self.image = None
def setImage(self, img, *args, **kargs):
"""
img must be ndarray of shape (x,y), (x,y,3), or (x,y,4).
@ -43,22 +54,22 @@ class RawImageWidget(QtGui.QWidget):
argb, alpha = fn.makeARGB(self.opts[0], *self.opts[1], **self.opts[2])
self.image = fn.makeQImage(argb, alpha)
self.opts = ()
#if self.pixmap is None:
#self.pixmap = QtGui.QPixmap.fromImage(self.image)
# if self.pixmap is None:
# self.pixmap = QtGui.QPixmap.fromImage(self.image)
p = QtGui.QPainter(self)
if self.scaled:
rect = self.rect()
ar = rect.width() / float(rect.height())
imar = self.image.width() / float(self.image.height())
if ar > imar:
rect.setWidth(int(rect.width() * imar/ar))
rect.setWidth(int(rect.width() * imar / ar))
else:
rect.setHeight(int(rect.height() * ar/imar))
rect.setHeight(int(rect.height() * ar / imar))
p.drawImage(rect, self.image)
else:
p.drawImage(QtCore.QPointF(), self.image)
#p.drawPixmap(self.rect(), self.pixmap)
# p.drawPixmap(self.rect(), self.pixmap)
p.end()
@ -67,14 +78,18 @@ if HAVE_OPENGL:
"""
Similar to RawImageWidget, but uses a GL widget to do all drawing.
Perfomance varies between platforms; see examples/VideoSpeedTest for benchmarking.
Checks if setConfigOptions(imageAxisOrder='row-major') was set.
"""
def __init__(self, parent=None, scaled=False):
QtOpenGL.QGLWidget.__init__(self, parent=None)
QtOpenGL.QGLWidget.__init__(self, parent)
self.scaled = scaled
self.image = None
self.uploaded = False
self.smooth = False
self.opts = None
self.row_major = getConfigOption('imageAxisOrder') == 'row-major'
def setImage(self, img, *args, **kargs):
"""
@ -88,7 +103,7 @@ if HAVE_OPENGL:
def initializeGL(self):
self.texture = glGenTextures(1)
def uploadTexture(self):
glEnable(GL_TEXTURE_2D)
glBindTexture(GL_TEXTURE_2D, self.texture)
@ -100,17 +115,22 @@ if HAVE_OPENGL:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER)
#glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_BORDER)
shape = self.image.shape
### Test texture dimensions first
#glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGBA, shape[0], shape[1], 0, GL_RGBA, GL_UNSIGNED_BYTE, None)
#if glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH) == 0:
#raise Exception("OpenGL failed to create 2D texture (%dx%d); too large for this hardware." % shape[:2])
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, shape[0], shape[1], 0, GL_RGBA, GL_UNSIGNED_BYTE, self.image.transpose((1,0,2)))
# glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_BORDER)
if self.row_major:
image = self.image
else:
image = self.image.transpose((1, 0, 2))
# ## Test texture dimensions first
# shape = self.image.shape
# glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGBA, shape[0], shape[1], 0, GL_RGBA, GL_UNSIGNED_BYTE, None)
# if glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH) == 0:
# raise Exception("OpenGL failed to create 2D texture (%dx%d); too large for this hardware." % shape[:2])
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.shape[1], image.shape[0], 0, GL_RGBA, GL_UNSIGNED_BYTE, image)
glDisable(GL_TEXTURE_2D)
def paintGL(self):
if self.image is None:
if self.opts is None:
@ -118,26 +138,23 @@ if HAVE_OPENGL:
img, args, kwds = self.opts
kwds['useRGBA'] = True
self.image, alpha = fn.makeARGB(img, *args, **kwds)
if not self.uploaded:
self.uploadTexture()
glViewport(0, 0, self.width() * self.devicePixelRatio(), self.height() * self.devicePixelRatio())
glEnable(GL_TEXTURE_2D)
glBindTexture(GL_TEXTURE_2D, self.texture)
glColor4f(1,1,1,1)
glColor4f(1, 1, 1, 1)
glBegin(GL_QUADS)
glTexCoord2f(0,0)
glVertex3f(-1,-1,0)
glTexCoord2f(1,0)
glTexCoord2f(0, 1)
glVertex3f(-1, -1, 0)
glTexCoord2f(1, 1)
glVertex3f(1, -1, 0)
glTexCoord2f(1,1)
glTexCoord2f(1, 0)
glVertex3f(1, 1, 0)
glTexCoord2f(0,1)
glTexCoord2f(0, 0)
glVertex3f(-1, 1, 0)
glEnd()
glDisable(GL_TEXTURE_3D)