Hello,
since two days I am trying to get the sharing of a texture between
OpenGL and OpenCL working, but there must be something I am missing
here.
For now I am trying to get an OpenCL-program to fill a texture and I now
have code that does not generate any exceptions, the textures are valid
in the OpenGl world since I can fill and display them and the textures
seem valid in the OpenCL world too, since I can query their imageformat
etc. The only thing is that the program doesn't seem to have any effect.
I use this OpenCl code:
src = """
__kernel void fill_texture(write_only image2d_t out)
{
int id0 = get_global_id(0);
int id1 = get_global_id(1);
write_imageui(out, (int2)( id0, id1 ), (uint4)(255, 54, 254, 255));
}
"""
this is where I initialize things:
def initializeGL(self):
init_all()
self.initializeCL()
self.yellow = np.zeros((tex_width, tex_height, 4),
dtype=np.uint8)
self.yellow[:] = [255,255,0,0]
self.texture2 = Texture.from_array(tex_width, tex_height,
self.yellow, dtype="uint8", planes=4)
glFlush()
self.prog = cl.Program(self.ctx, src).build()
self.queue = cl.CommandQueue(self.ctx)
mf = cl.mem_flags
self.texture2_cl = cl.GLTexture(self.ctx, mf.READ_WRITE,
GL_TEXTURE_RECTANGLE_ARB, 0, int(self.texture2.id), 2)
self.queue.finish()
def initializeCL(self):
platform = cl.get_platforms()[0]
if sys.platform == "darwin":
self.ctx =
cl.Context(properties=get_gl_sharing_context_properties(),
devices=[])
else:
# Some OSs prefer clCreateContextFromType, some prefer
# clCreateContext. Try both.
try:
self.ctx = cl.Context(properties=[
(cl.context_properties.PLATFORM, platform)]
+
get_gl_sharing_context_properties())
except:
self.ctx = cl.Context(properties=[
(cl.context_properties.PLATFORM, platform)]
+
get_gl_sharing_context_properties(),
devices =
[platform.get_devices()[0]])
and this is my drawing function:
def paintGL(self):
try:
glFinish()
cl.enqueue_acquire_gl_objects(self.queue,
[self.texture2_cl])
self.prog.fill_texture(self.queue, (800,800), (32,32),
self.texture2_cl)
cl.enqueue_release_gl_objects(self.queue,
[self.texture2_cl])
except cl.RuntimeError:
raise SystemExit
self.queue.finish()
self.texture2.draw()
I am using a texture class I defined myself, but that works.
What am I missing ?
When looking around I was quite suprised that so few people seem to be
interested in this: there are no code examples (a few in C++) and only
some questions of people who seem to have been stuck at about the same
point as I have ? Or is this so obvious ?
If someone can illuminate me in this, I would be very grateful indeed !
kind regards,
Joost.
_______________________________________________
PyOpenCL mailing list
[email protected]
http://lists.tiker.net/listinfo/pyopencl
