ar_demo.py 文件源码

def draw_background(imgName):
    bg_image = pygame.image.load(imgName).convert()
    bg_data = pygame.image.tostring(bg_image, 'RGBX', 1)
    width, height = bg_image.get_size()

    glMatrixMode(GL_MODELVIEW)
    glLoadIdentity()
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)

    glEnable(GL_TEXTURE_2D)
    glGT = glGenTextures(1)
    glBindTexture(GL_TEXTURE_2D, glGT)
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, bg_data)
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)

    glBegin(GL_QUADS)
    glTexCoord2f(0.0,0.0); glVertex3f(-1.0,-1.0,-1.0)
    glTexCoord2f(1.0,0.0); glVertex3f( 1.0,-1.0,-1.0)
    glTexCoord2f(1.0,1.0); glVertex3f( 1.0, 1.0,-1.0)
    glTexCoord2f(0.0,1.0); glVertex3f(-1.0, 1.0,-1.0)
    glEnd()

    glDeleteTextures(1)

    return glGT