To discard basic cases easy to test I would
1. verify that gpu + driver supports size > 1024 ( anything non.ancient
should, but lets verify )
(quoting from
https://bitbucket.org/pyglet/pyglet/issues/68/loading-big-images-causes-invalid
)
Try adding this to your code before it loads the image. It should
report the maximum width or height of a texture, more or less.
from ctypes import c_long
i = c_long()
glGetIntegerv(GL_MAX_TEXTURE_SIZE, i)
print(i)
If it prints 1024, your gpu or driver does not support bigger texture
sizes
2. if > 1024, try to load the next power of two size ( 2048 x 2048 );
Power of two dimensions is the easiest case for the driver
On Thu, Dec 22, 2016 at 10:41 AM, <[email protected]> wrote:
>
> Hi, I'm having problems with image-loading, but only under certain
> conditions. It works fine on Linux, but
> not Windows 7 64-bit. Looking at older posts, it seems like there might
> have once been an issue running
> under 64-bit Windows, but if more recent posts are correct, that seems to
> be working.
>
> I can load an image if it's 1024x1024 - but if it's one pixel larger, then
> things bomb:
>
> import os
> from pyglet import image
>
> #img_file = os.path.normpath(r'C:foo_good.png') # 1024x1024 image -
> works
> img_file = os.path.normpath(r'C:foo_bad.png') # 1025x1025 image -
> bombs
>
> img = image.load(img_file)
> foo = img.get_texture()
> print "texture = ", foo # texture = <Texture 1024x1024>
>
> Traceback (most recent call last):
> File "C:/test_display.py", line 38, in <module>
> foo = img.get_texture()
> File "C:\site-packages\pyglet\image\__init__.py", line 818, in
> get_texture.force_rectangle)
> File "C:\site-packages\pyglet\image\__init__.py", line 803, in
> create_texture.rectangle, force_rectangle)
> File "C:\site-packages\pyglet\image\__init__.py", line 1517, in
> create.blank)
> File "C:\site-packages\pyglet\gl\lib.py", line 104, in errcheck
> raise GLException(msg)
> pyglet.gl.lib.GLException: invalid value
>
> Point of Failure in the Code:
>
> image\__init__.py
> class Texture(AbstractImage):
> def create(cls, width, height, internalformat=GL_RGBA,
> rectangle=False, force_rectangle=False,
> min_filter=GL_LINEAR, mag_filter=GL_LINEAR):
> ...
> # Fails on one of these two lines:
> blank = (GLubyte * (texture_width * texture_height * 4))() #
> line 1508
> glTexImage2D(target, 0, ..., blank)
>
> That first line bothered me, had to break it down, see what was happening.
> So it appears that
> magically, multiplying an Int by a ubyte creates a <class
> 'pyglet.image.c_ubyte_Array_4194304'>,
> which is itself, a Callable().
> foo = GLubyte * (texture_width * texture_height * 4)
> blank = (foo)()
>
> Another person having the same problem:
> http://stackoverflow.com/questions/17508702/loading-an-image-using-pyglet
>
> My system config:
>
> Windows 7 64-bit
> Python 2.7.11
> Pyglet 1.2.4
> DirectX 11
> Screensize = 1920x1080
>
> Thanks.
>
> John C>
>
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