Ha! the access error was caused by specifying RGBA when the image was
actually RGB.
On Monday, May 25, 2020 at 11:14:10 AM UTC+1, Nicky Mac wrote:
>
>
> I don't have a problem creating and applying square textures, using
> windows10 python36 and latest pyglet
> but following tutorials to apply 'tarnish' size 512 x 256 I get an access
> violation.
> Here is th stripped-down code:
> #!/usr/bin/env python
> import pyglet
> from pyglet.gl
> import *
> from pyglet import window, image, resource
> from pyglet.window import key
> from random import randint
> from math import cos, sin
> from glframe import GLFrame
> from fakeglut import glutSolidSphere
> from gltools import gltDrawSphere
> from math3d import M3DMatrix44f, m3dInvertMatrix44
>
> frameCamera = GLFrame()
>
> class MainWindow(window.Window):
> def __init__(self, *args, **kwargs):
> window.Window.__init__(self, *args, **kwargs)
> # Cull backs of polygons
> glCullFace(GL_BACK)
> glFrontFace(GL_CCW)
> glEnable(GL_CULL_FACE)
> glEnable(GL_DEPTH_TEST)
>
> # get tarnish texture object as texture unit 0
> glActiveTexture(GL_TEXTURE0)
> glEnable(GL_TEXTURE_2D)
> img = image.load('Assets/tarnish.jpg')
> print('set tarnish
> texture',(img.width,img.height),img.pitch,type(img))
> glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, img.width, img.height, 0,
> GL_RGBA,
> GL_UNSIGNED_BYTE, img.get_data('RGBA', img.pitch))
> glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
> glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
> GL_LINEAR_MIPMAP_LINEAR);
> glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
> GL_CLAMP_TO_EDGE);
> glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
> GL_CLAMP_TO_EDGE)
> glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE)
> glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)
>
> which produces:
> set tarnish texture (512, 256) -1536 <class 'pyglet.image.ImageData'>
> Traceback (most recent call last):
> File "C:\Python\Python36\Dhruve and me\Pyglet\github_tarnish.py", line
> 105, in <module>
> w = MainWindow(800, 600, caption='OpenGL Cube Maps Camera:Arrow keys',
> resizable=True)
> File "C:\Python\Python36\Dhruve and me\Pyglet\github_tarnish.py", line
> 30, in __init__
> GL_UNSIGNED_BYTE, img.get_data('RGBA', img.pitch))
> OSError: exception: access violation reading 0x00000234EA147000
> >>>.
>
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>
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