OpenGL image display in 3d space

Question

I would like to display an image onto a rectangle in 3d space with pyOpengl and pygame.

I don't mind if the image is disorted for now. Here is my code with the few opengl functions that I know of for image display:

import pygame, OpenGL, math, numpy
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *
from PIL import Image #have Pillow instead of PIL

img = Image.open('myPixelArt.bmp')
img_data = numpy.array(list(img.getdata()), numpy.int8)
im = glGenTextures(1,img)
glPixelStorei(GL_UNPACK_ALIGNMENT,4)
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_MAG_FILTER, GL_LINEAR)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexImage2D(GL_TEXTURE_2D, 5, GL_RGB, img.size[0], img.size[1], 0, GL_RGB, GL_UNSIGNED_BYTE, img_data)
gluBuild2DMipmaps( GL_TEXTURE_2D, 3, img.size[0], img.size[1], GL_RGB, GL_UNSIGNED_BYTE, img_data );
def wall(image): #I would like the image on this wall
    glColor((1,0,0))
    glBindTexture(GL_TEXTURE_2D,image) 
    glBegin(GL_QUADS)
    glTexCoord2f(0,0)
    glVertex3f(-4,-4,-8)
    glTexCoord2f(1,0)
    glVertex3f(-4,4,-8)
    glTexCoord2f(1,1)
    glVertex3f(4,4,-8)
    glTexCoord2f(0,1)
    glVertex3f(4,-4,-8)
    glEnd()

def main():
    pygame.init()
    display = (600,600)
    screen = pygame.display.set_mode(display, DOUBLEBUF|OPENGL)
main()

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()

    glLoadIdentity()
    gluPerspective(45, 1, 0.05, 100)
    glEnable(GL_TEXTURE_2D)

    glTranslatef(0,0,-5)
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)

    wall(im)

    pygame.display.flip()
    pygame.time.wait(50)

However, if i call wall(img) instead, I get

File "C:\Users\Matt\Desktop\MattPython\Stackoverflow.py", line 19, in wall
    glBindTexture(GL_TEXTURE_2D,image)
ArgumentError: argument 2: <type 'exceptions.TypeError'>: wrong type

Answer 1

I got it working, fixed a few things:

1) needed to call pygame.init() and pygame.display.set_mode (which is main()) before glGenTextures.

2) used pygame.image.load instead of Image.open

3) used pygame.image.tostring(img, "RGB", 1) instead of numpy.array(list(img.getdata()), numpy.int8)

4) need to call glBindTexture before glTexParameteri

This is my working example:

import pygame, OpenGL
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *

def main():
    pygame.init()
    pygame.display.set_mode((600,600), DOUBLEBUF|OPENGL)
main()

img = pygame.image.load('myPixelArt.bmp')
textureData = pygame.image.tostring(img, "RGB", 1)
width = img.get_width()
height = img.get_height()

im = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, im)

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, textureData)
glEnable(GL_TEXTURE_2D)

def wall(image): 
    glBegin(GL_QUADS)
    glTexCoord2f(0,0)
    glVertex3f(-4,-4,-16)
    glTexCoord2f(0,1)
    glVertex3f(-4,4,-16)
    glTexCoord2f(1,1)
    glVertex3f(4,4,-8)
    glTexCoord2f(1,0)
    glVertex3f(4,-4,-8)
    glEnd()

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()

    glLoadIdentity()
    gluPerspective(45, 1, 0.05, 100)
    glTranslatef(0,0,-5)
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)

    wall(im)

    pygame.display.flip()
    pygame.time.wait(50)