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在initializeGL中QGLWidget：
我正在加载一个.exr图像（128mb）4000x2000imageio.imread 

from imageio import imread
img_array = imread("c:/sample.exr")
self.textureID = glGenTextures(1)

in paintGLin QGLWidget：
我绘制我的单个四边形，glBegin(GL_QUADS)然后glEnd()将纹理输入glTexImage2D并将其绑定到我之前创建的四边形。

glBindTexture(GL_TEXTURE_2D, self.textureID)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, 1920, 1080, 0, GL_RGBA, GL_FLOAT, img_array)

我加载图像或代码本身没有任何问题，一切正常，但我面临性能问题并且导航场景开始滞后，我认为是因为图像的巨大尺寸。

有什么办法可以减小尺寸吗？还是提高性能呢？

注意：即使是图像，numpy.float32我也只显示它，GL_RGBA这意味着有 0.4545 伽马乘法，我不知道这是否会影响性能，但我想指出这一点。

提前致谢。

更新：
这是代码：

import os
from PySide.QtGui import QColor
from PySide.QtOpenGL import QGLWidget

from imageio import imread

from OpenGL.GL import *
from OpenGL.GLU import *

from engine.nodes import (ImageNode, NodeType, CubeNode, Vector3)

class QImageProcessor(QGLWidget):
    def __init__(self, parent=None):
        super(QImageProcessor, self).__init__(parent)
        self.model = list()

        self.zoomVal = 1.2
        self.local_translate = (0.0, 0.0, 0.0)
        self.local_scale = (1.0, 1.0, 1.0)
        self.xRot = 0
        self.yRot = 0
        self.zRot = 0

    def initializeGL(self):
        self.qglClearColor(QColor.fromCmykF(0.0, 0.1, 0.0, 0.882))
        glViewport( 0, 0, self.width(), self.height())
        glEnable(GL_TEXTURE_2D)
        glEnable(GL_CULL_FACE)
        glEnable(GL_MULTISAMPLE)
        glEnable(GL_LINE_SMOOTH, GL_LINE_WIDTH, GL_ALIASED_LINE_WIDTH_RANGE)
        glShadeModel(GL_FLAT)
        glEnable(GL_DEPTH_TEST)
        glHint(GL_LINE_SMOOTH_HINT,  GL_NICEST)
        glDepthRange (0.1, 1.0)

        # adding images
        image1 = "c:/sample.exr"
        new_image1 = ImageNode(image1)
        new_image1.TextureID = glGenTextures(1)
        new_image1.Data = imread(image1, format='.exr')
        self.model.append(new_image1)
        image2 = "c:/sample2.jpg"
        new_image2 = ImageNode(image2)
        new_image2.TextureID = glGenTextures(1)
        new_image2.Data = imread(image2, format='.jpg')
        self.model.append(new_image2)

    def paintGL(self):
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        gluOrtho2D(-self.zoomVal, +self.zoomVal, -self.zoomVal, +self.zoomVal)
        glLoadIdentity()
        glTranslated(*self.local_translate)
        glRotated(self.xRot / 16.0, 1.0, 0.0, 0.0)
        glRotated(self.yRot / 16.0, 0.0, 1.0, 0.0)
        glRotated(self.zRot / 16.0, 0.0, 0.0, 1.0)
        glScalef(*self.local_scale)
        genList = glGenLists(1)
        glNewList(genList, GL_COMPILE)
        for node in self.model:
            vertices = node.Vertices # list of vertices
            edges = node.Edges # list of edges
            face = node.Face # list of faces
            texcoords = node.TextureCoordinates # list of texture coordinates

            glPushAttrib(GL_ALL_ATTRIB_BITS)
            glPolygonMode(GL_FRONT, GL_FILL)

            glPixelStorei(GL_UNPACK_ALIGNMENT,1)
            glBindTexture(GL_TEXTURE_2D, node.TextureID)
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP)
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP)
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
            glTexImage2D(GL_TEXTURE_2D, 0, node.InternalFormat, node.Width, node.Height, 0, node.Format, node.Type, node.Data)
            # face and UV
            glBegin(GL_QUADS)
            self.qglColor(QColor(255,255,255))
            for vertex in face:
                glVertex3fv(vertices[vertex])
                glTexCoord2f(texcoords[vertex][0], texcoords[vertex][1])
            glEnd()
            glPopAttrib()
        glEndList()
        glCallList(genList)

我试过这个：
我转移glTexCoord2f到initializeGL函数，绑定一次，然后将它绑定到 0：

image2 = "c:/sample2.jpg"
new_image2 = ImageNode(image2)
new_image2.TextureID = glGenTextures(1)
new_image2.Data = imread(image2, format='.jpg')
glTexImage2D(GL_TEXTURE_2D, 0, new_image2.InternalFormat, new_image2.Width, new_image2.Height, 0, new_image2.Format, new_image2.Type, new_image2.Data)
glBindTexture(GL_TEXTURE_2D, new_image2.TextureID)
glBindTexture(GL_TEXTURE_2D, 0)
self.model.append(new_image2)

然后paintGL再次绑定它，

def paintGL(self):
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    gluOrtho2D(-self.zoomVal, +self.zoomVal, -self.zoomVal, +self.zoomVal)
    glLoadIdentity()
    glTranslated(*self.local_translate)
    glRotated(self.xRot / 16.0, 1.0, 0.0, 0.0)
    glRotated(self.yRot / 16.0, 0.0, 1.0, 0.0)
    glRotated(self.zRot / 16.0, 0.0, 0.0, 1.0)
    glScalef(*self.local_scale)
    genList = glGenLists(1)
    glNewList(genList, GL_COMPILE)
    for node in self.model:
        vertices = node.Vertices # list of vertices
        edges = node.Edges # list of edges
        face = node.Face # list of faces
        texcoords = node.TextureCoordinates # list of texture coordinates

        glPushAttrib(GL_ALL_ATTRIB_BITS)
        glPolygonMode(GL_FRONT, GL_FILL)

        glPixelStorei(GL_UNPACK_ALIGNMENT,1)
        glBindTexture(GL_TEXTURE_2D, node.TextureID)
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP)
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP)
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
        # face and UV
        glBegin(GL_QUADS)
        self.qglColor(QColor(255,255,255))
        for vertex in face:
            glVertex3fv(vertices[vertex])
            glTexCoord2f(texcoords[vertex][0], texcoords[vertex][1])
        glEnd()
        glPopAttrib()
    glEndList()
    glCallList(genList)

但它没有显示纹理，不确定我是否遗漏了什么。

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