Invalid context for GL
by mt
Hi,
I'm trying to access GL textures from pyopencl. Here is my test program:
import sys, os, pygame
from OpenGL.GL import *
sys.path.append("extern/pyopencl/build/lib.linux-x86_64-2.6")
import pyopencl
pygame.init()
screen = pygame.display.set_mode((1024, 768), pygame.HWSURFACE |
pygame.OPENGL | pygame.DOUBLEBUF)
if pyopencl.have_gl():
context = pyopencl.create_some_context()
tex = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, tex)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA,
GL_UNSIGNED_BYTE, None)
cltex = pyopencl.GLTexture(context, pyopencl.mem_flags.READ_ONLY,
GL_TEXTURE_2D, 0, tex, 2)
It fails with error:
Traceback (most recent call last):
File "cl.py", line 14, in <module>
cltex = pyopencl.GLTexture(context, pyopencl.mem_flags.READ_ONLY,
GL_TEXTURE_2D, 0, tex, 2)
pyopencl.LogicError: clCreateFromGLTexture2D failed: invalid context
I thought that the problem might be in pyopencl's context creation,
which doesn't take the GL context into account. I tried to fix it by
adding appropriate CL_GL_CONTEXT_KHR, CL_GLX_DISPLAY_KHR and
CL_CONTEXT_PLATFORM props to the context, but then I got another error
"pyopencl.LogicError: clCreateFromGLTexture2D failed: invalid value". I
can run kernels just fine with my setup, but this GL stuff won't work.
What am I doing wrong?
7 years, 8 months
Does enqueue_copy_buffer work?
by David Minor
I see that this function has been added to .92, but I don't see any test to
check it. When I try it I just get parameter errors. Has anyone written a
test?
8 years, 5 months
patch for examples/gl_interop_demo.py
by Christoph Gohlke
Hello,
please consider the following patch, which enables gl_interop_demo.py to
run on Windows.
Best,
Christoph
@@ -31,11 +31,11 @@ def initialize():
import sys
if sys.platform == "linux2":
props.append(
(ctx_props.GLX_DISPLAY_KHR,
GLX.glXGetCurrentDisplay()))
- elif sys.platform == "nt":
+ elif sys.platform == "win32":
props.append(
(ctx_props.WGL_HDC_KHR,
WGL.wglGetCurrentDC()))
ctx = cl.Context(properties=props)
8 years, 6 months
Linear algebra package for PyOpenCL
by Bogdan Opanchuk
Hi all,
Does anyone know if there is some linear algebra library for PyOpenCL?
I googled, but didn't manage to find anything.
In fact, I would be satisfied even with LA module for PyCuda (unless
it uses CUBLAS) — I'd just add OpenCL functionality to it.
Thanks in advance.
Best regards,
Bogdan
8 years, 6 months
