def send_textures(self):
images = []
max_width = 0
max_height = 0
if self.scene.textures:
textures = {k: v[0] for k, v in self.scene.textures.items()}
textures = {v: k for k, v in self.scene.textures.items()}
for i in sorted(textures.keys()):
print(i)
v = textures[i]
if v is None:
continue
print(v)
image = self.load_image(v)
if image.shape[0] > max_height:
max_height = image.shape[0]
if image.shape[1] > max_width:
max_width = image.shape[1]
images.append(image)
if len(images) == 0:
images = [np.zeros((128, 128, 3))]
max_width = 128
max_height = 128
print(max_width, max_height)
images = [
np.pad(image,
((0, max_height - image.shape[0]),
(0, max_width - image.shape[1]), (0, 4 - image.shape[2])),
"wrap") for image in images
]
n_images = len(images)
images = np.concatenate(images, 0)
img_format = cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.UNORM_INT8)
image = cl.Image(self.context,
cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR,
img_format,
hostbuf=images.flatten(),
is_array=True,
shape=(max_width, max_height, n_images),
pitches=(max_width * 4, max_width * max_height * 4))
self.textures = image
def d_create_image_cubemap(self, cubemap):
""" create an image opencl from numpy image rgba """
size = cubemap[0].shape[0]
added_array = cubemap[0]
for i in range(1, 6):
added_array = numpy.append(added_array, cubemap[i])
image = cl.Image(
self.ctx, cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR,
cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.FLOAT),
(size, size, 6), None, added_array, True)
return image
def LoadImage(context, fileName):
im = Image.open(fileName)
# Make sure the image is RGBA formatted
if im.mode != "RGBA":
im = im.convert("RGBA")
# Convert to uint8 buffer
buffer = im.tostring()
clImageFormat = cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.UNORM_INT8)
clImage = cl.Image(context,
cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR,
clImageFormat, im.size, None, buffer)
return clImage, im.size
def do_test(buf):
global program, context
queue = pyopencl.CommandQueue(context)
#input image:
iformat = pyopencl.ImageFormat(pyopencl.channel_order.R,
pyopencl.channel_type.UNSIGNED_INT8)
#flags = mem_flags.READ_ONLY | mem_flags.COPY_HOST_PTR
flags = mem_flags.READ_ONLY | mem_flags.USE_HOST_PTR
iimage = pyopencl.Image(context, flags, iformat, shape=shape, hostbuf=buf)
#output image:
oformat = pyopencl.ImageFormat(pyopencl.channel_order.RGBA,
pyopencl.channel_type.UNORM_INT8)
oimage = pyopencl.Image(context,
mem_flags.WRITE_ONLY,
oformat,
shape=shape)
program.EXAMPLE(queue, globalWorkSize, localWorkSize, iimage, oimage)
#in a real application, we would readback the output image here
queue.finish()
def run_render(render, debug=False):
debug=True
ctx = cl.create_some_context(interactive=False)
queue = cl.CommandQueue(ctx)
x = render.x
y = render.y
outbuf_np = np.empty(int(x * y * 4)).astype(np.uint8)
# outbuf_g = cl.Buffer(ctx, mf.WRITE_ONLY, outbuf_np.nbytes)
fmt = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.UNSIGNED_INT8)
outbuf_g = cl.Image(ctx, mf.WRITE_ONLY, fmt, shape=(x, y))
(xwidth, ywidth) = calc_width(render.x, render.y, render.zoom);
xscale = xwidth / render.x
yscale = ywidth / render.y
xmin = render.center_r - xwidth / 2
ymin = render.center_i - ywidth / 2
if debug:
print("xwidth: " + str(xwidth))
print("ywidth: " + str(ywidth))
print("xscale: " + str(xscale))
print("yscale: " + str(yscale))
print("xmin: " + str(xmin))
print("ymin: " + str(ymin))
print("(x,y): " + str((x,y)))
print("outbuf_g.size: " + str(outbuf_g.size))
print("outbuf_g.int_ptr: " + str(outbuf_g.int_ptr))
with open("fractal.cl", 'r') as f:
prog_src = f.read()
# do not let the GPU do too much debug logging because that lags the system
if debug and x < 500 and y < 500:
prog_src = "#define DEBUG 1\n" + prog_src
prog = cl.Program(ctx, prog_src).build()
t = time()
prog.sum(queue, (x, y), None,
outbuf_g,
np.float64(xmin), np.float64(ymin), np.float64(xscale), np.float64(yscale)
)
queue.finish()
t = time() - t
print('time:', t, 's')
print(1/t, 'Hz')
cl.enqueue_copy(queue, outbuf_np, outbuf_g, origin=(0,0), region=(x, y))
queue.finish()
img = Image.fromarray(outbuf_np.reshape((y,x,4)), 'RGBA')
img.save(render.output)
print('wrote', render.output)
def init_image(ctx, ary, num_channels=None, mode="r", norm_int=False):
if not ary.flags.c_contiguous:
raise ValueError("array must be C-contiguous")
dtype = ary.dtype
if num_channels is None:
from pyopencl.array import vec
try:
dtype, num_channels = vec.type_to_scalar_and_count[dtype]
except KeyError:
# It must be a scalar type then.
num_channels = 1
shape = ary.shape
strides = ary.strides
elif num_channels == 1:
shape = ary.shape
strides = ary.strides
else:
if ary.shape[-1] != num_channels:
raise RuntimeError("last dimension must be equal to number of channels")
shape = ary.shape[:-1]
strides = ary.strides[:-1]
if mode == "r":
mode_flags = cl.mem_flags.READ_ONLY
elif mode == "w":
mode_flags = cl.mem_flags.WRITE_ONLY
else:
raise ValueError("invalid value '%s' for 'mode'" % mode)
img_format = {
1: cl.channel_order.R,
2: cl.channel_order.RG,
3: cl.channel_order.RGB,
4: cl.channel_order.RGBA,
}[num_channels]
assert ary.strides[-1] == ary.dtype.itemsize
if norm_int:
channel_type = cl.DTYPE_TO_CHANNEL_TYPE_NORM[dtype]
else:
channel_type = cl.DTYPE_TO_CHANNEL_TYPE[dtype]
return cl.Image(ctx, mode_flags,
cl.ImageFormat(img_format, channel_type),
shape=shape[::-1])
def vglClImageUpload(img):
global ocl
mf = cl.mem_flags
# IMAGE VARS
print("-> vglClImageUpload: Starting.")
if (img.getVglShape().getNFrames() == 1):
origin = (0, 0, 0)
region = (img.getVglShape().getWidth(), img.getVglShape().getHeigth(),
1)
shape = (img.getVglShape().getWidth(), img.getVglShape().getHeigth())
imgFormat = cl.ImageFormat(vl.cl_channel_order(img),
vl.cl_channel_type(img))
img.oclPtr = cl.Image(ocl.context, mf.READ_ONLY, imgFormat, shape)
elif (img.getVglShape().getNFrames() > 1):
origin = (0, 0, 0)
region = (img.getVglShape().getWidth(), img.getVglShape().getHeigth(),
img.getVglShape().getNFrames())
shape = (img.getVglShape().getWidth(), img.getVglShape().getHeigth(),
img.getVglShape().getNFrames())
imgFormat = cl.ImageFormat(vl.cl_channel_order(img),
vl.cl_channel_type(img))
img.oclPtr = cl.Image(ocl.context, mf.READ_ONLY, imgFormat, shape)
else:
print("vglClImageUpload: VglImage NFrames wrong. NFrames returns:",
img.getVglShape().getNFrames())
exit()
# COPYING NDARRAY IMAGE TO OPENCL IMAGE OBJECT
cl.enqueue_copy(ocl.commandQueue,
img.get_oclPtr(),
img.get_ipl(),
origin=origin,
region=region,
is_blocking=True)
print("<- vglClImageUpload: Ending.\n")
def points2lab(points, shape, distance="L2"):
dstFloatImage = cl.Image(ctx, mf.WRITE_ONLY, floatFormat, shape=shape)
dstUintImage = cl.Image(ctx, mf.READ_WRITE, uint8Format, shape=shape)
temp = np.zeros(shape[1::-1] + (4, ), dtype=np.float32)
pointsBuffer = cl.Buffer(ctx,
mf.READ_ONLY | mf.COPY_HOST_PTR,
hostbuf=np.array(points, dtype=np.int32).ravel())
if distance == "L1":
prg.drawVoronoiL1(queue, shape, None, dstUintImage,
np.uint32(len(points)), pointsBuffer, np.uint32(1))
elif distance == "L2":
prg.drawVoronoiL2(queue, shape, None, dstUintImage,
np.uint32(len(points)), pointsBuffer, np.uint32(1))
elif distance == "Linf":
prg.drawVoronoiLinf(queue, shape, None, dstUintImage,
np.uint32(len(points)), pointsBuffer, np.uint32(1))
prg.rgb2lab(queue, shape, None, dstUintImage, dstFloatImage)
cl.enqueue_copy(queue, temp, dstFloatImage, origin=(0, 0), region=shape)
dstUintImage.release()
dstFloatImage.release()
return temp
def loadJPG(self, filename):
img = matplotlib.image.imread(filename)
self.source_width = img.shape[1]
self.source_height = img.shape[0]
if self.parm("width").eval() != 0:
self.width = self.parm("width").eval()
else:
self.width = self.source_width
if self.parm("height").eval() != 0:
self.height = self.parm("height").eval()
else:
self.height = self.source_height
r = numpy.array(img[:,:,0],dtype=numpy.int8)
g = numpy.array(img[:,:,1],dtype=numpy.int8)
b = numpy.array(img[:,:,2],dtype=numpy.int8)
self.devInBufferR = cl.Image(self.engine.ctx, self.engine.mf.READ_ONLY | self.engine.mf.COPY_HOST_PTR, cl.ImageFormat(cl.channel_order.INTENSITY, cl.channel_type.UNORM_INT8), shape=(self.source_width, self.source_height,), pitches=(self.source_width,), hostbuf=r)
self.devInBufferG = cl.Image(self.engine.ctx, self.engine.mf.READ_ONLY | self.engine.mf.COPY_HOST_PTR, cl.ImageFormat(cl.channel_order.INTENSITY, cl.channel_type.UNORM_INT8), shape=(self.source_width, self.source_height,), pitches=(self.source_width,), hostbuf=g)
self.devInBufferB = cl.Image(self.engine.ctx, self.engine.mf.READ_ONLY | self.engine.mf.COPY_HOST_PTR, cl.ImageFormat(cl.channel_order.INTENSITY, cl.channel_type.UNORM_INT8), shape=(self.source_width, self.source_height,), pitches=(self.source_width,), hostbuf=b)
def get_similar_device_image_object(self, ctx, queue):
if (self.imgDim == vc.VGL_IMAGE_2D_IMAGE()):
shape = (self.vglshape.getWidth(), self.vglshape.getHeight())
mf = cl.mem_flags
imgFormat = cl.ImageFormat(self.get_toDevice_channel_order(),
self.get_toDevice_dtype())
img_copy = cl.Image(ctx, mf.WRITE_ONLY, imgFormat, shape)
elif (self.imgDim == vc.VGL_IMAGE_3D_IMAGE()):
shape = (self.vglshape.getWidth(), self.vglshape.getHeight(),
self.vglshape.getNFrames())
mf = cl.mem_flags
imgFormat = cl.ImageFormat(self.get_toDevice_channel_order(),
self.get_toDevice_dtype())
img_copy = cl.Image(ctx, mf.WRITE_ONLY, imgFormat, shape)
print("--> Orig:",
self.get_device_image().width,
self.get_device_image().height,
self.get_device_image().depth)
print("--> Copy:", img_copy.width, img_copy.height, img_copy.depth)
return img_copy
def load_image(ctx, file_name):
im = Image.open(file_name)
# Make sure the image is RGBA formatted
if im.mode != "RGBA":
im = im.convert("RGBA")
# Convert to uint8 buffer
buf = im.tobytes()
cl_image_format = cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.UNORM_INT8)
cl_image = cl.Image(
ctx, cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR,
cl_image_format, im.size, None, buf)
return cl_image, im.size
def test_image_2d(self, device, ctx_getter):
context = ctx_getter()
if not device.image_support:
from py.test import skip
skip("images not supported on %s" % device)
prg = cl.Program(
context, """
__kernel void copy_image(
__global float4 *dest,
__read_only image2d_t src,
sampler_t samp,
int width)
{
int x = get_global_id(0);
int y = get_global_id(1);
/*
const sampler_t samp =
CLK_NORMALIZED_COORDS_FALSE
| CLK_ADDRESS_CLAMP
| CLK_FILTER_NEAREST;
*/
dest[x + width*y] = read_imagef(src, samp, (float2)(x, y));
// dest[x + width*y] = get_image_height(src);
}
""").build()
a = numpy.random.rand(1024, 1024, 4).astype(numpy.float32)
queue = cl.CommandQueue(context)
mf = cl.mem_flags
a_img = cl.Image(context,
mf.READ_ONLY | mf.COPY_HOST_PTR,
cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.FLOAT),
shape=a.shape[:2],
hostbuf=a)
a_dest = cl.Buffer(context, mf.READ_WRITE, a.nbytes)
samp = cl.Sampler(context, False, cl.addressing_mode.CLAMP,
cl.filter_mode.NEAREST)
prg.copy_image(queue, a.shape, None, a_dest, a_img, samp,
numpy.int32(a.shape[0]))
a_result = numpy.empty_like(a)
cl.enqueue_read_buffer(queue, a_dest, a_result, is_blocking=True)
print a_result.dtype
assert la.norm(a_result - a) == 0
def __init__(self, ntheta, nphi, tol=1e-7, context=None):
'''
Create OpenCL kernels to convert samples of a harmonic
function, sampled at regular points on the unit sphere, into
cubic b-spline coefficients. These coefficients can be used for
rapid, GPU-based interpolation at arbitrary locations.
'''
if nphi % 2 != 0:
raise ValueError('The number of azimuthal samples must be even')
self.ntheta = ntheta
self.nphi = nphi
# This is the polar-ring grid shape
self.grid = 2 * (ntheta - 1), nphi // 2
# Set the desired precision of the filter coefficients
if tol > 0:
zp = math.sqrt(3) - 2.
self.precision = int(math.log(tol) / math.log(abs(zp)))
else:
self.precision = ntheta
# Don't let the precision exceed the number of samples!
self.precision = min(self.precision, min(ntheta, nphi))
# Grab the provided context or create a default
self.context = util.grabcontext(context)
# Build the program for the context
t = Template(filename=self._kernel, output_encoding='ascii')
self.prog = cl.Program(
self.context, t.render(ntheta=ntheta, nphi=nphi,
p=self.precision)).build()
# Create a command queue for the context
self.queue = cl.CommandQueue(self.context)
# Create an image that will store the spline coefficients
# Remember to pad the columns to account for repeated boundaries
mf = cl.mem_flags
self.coeffs = cl.Image(
self.context, mf.READ_WRITE,
cl.ImageFormat(cl.channel_order.RG, cl.channel_type.FLOAT),
[g + 3 for g in self.grid])
# The poles will be stored so they need not be interpolated
self.poles = 0., 0.
def getOutHostBuffer(self): device_buffer = self.getOutDevBuffer() host_buffer = numpy.empty((self.xRes(), self.yRes(), 4), dtype = numpy.float16) self.engine.openclQueue().finish() quantized_buffer = cl.Image(self.engine.openclContext(), self.engine.mf.READ_WRITE, cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.HALF_FLOAT), shape=self.shape()) with self.engine.openclQueue() as queue: evt = self.common_program.quantize_show(queue, self.shape(), None, device_buffer, quantized_buffer ) evt.wait() with self.engine.openclQueue() as queue: evt = cl.enqueue_copy(queue, host_buffer, quantized_buffer, origin=(0,0), region=self.shape()) evt.wait() return host_buffer
def _load_exr(ctx, filename):
f = OpenEXR.InputFile(filename)
dw = f.header()['dataWindow']
shape = (dw.max.x - dw.min.x + 1, dw.max.y - dw.min.y + 1)
sz = shape[0] * shape[1]
buf = np.empty(4 * sz, np.float32)
buf[0::4] = _read_channel(f, 'R')
buf[1::4] = _read_channel(f, 'G')
buf[2::4] = _read_channel(f, 'B')
buf[3::4] = np.ones(sz, np.float32)
return cl.Image(ctx,
cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR,
cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.FLOAT),
shape=shape,
hostbuf=buf)
def test_int_ptr(ctx_factory):
def do_test(obj):
new_obj = type(obj).from_int_ptr(obj.int_ptr)
assert obj == new_obj
assert type(obj) is type(new_obj)
ctx = ctx_factory()
device, = ctx.devices
platform = device.platform
do_test(device)
do_test(platform)
do_test(ctx)
queue = cl.CommandQueue(ctx)
do_test(queue)
evt = cl.enqueue_marker(queue)
do_test(evt)
prg = cl.Program(
ctx, """
__kernel void sum(__global float *a)
{ a[get_global_id(0)] *= 2; }
""").build()
do_test(prg)
do_test(prg.sum)
n = 2000
a_buf = cl.Buffer(ctx, 0, n * 4)
do_test(a_buf)
# crashes on intel...
# and pocl does not support CL_ADDRESS_CLAMP
if device.image_support and platform.vendor not in [
"Intel(R) Corporation",
"The pocl project",
]:
smp = cl.Sampler(ctx, False, cl.addressing_mode.CLAMP,
cl.filter_mode.NEAREST)
do_test(smp)
img_format = cl.get_supported_image_formats(
ctx, cl.mem_flags.READ_ONLY, cl.mem_object_type.IMAGE2D)[0]
img = cl.Image(ctx, cl.mem_flags.READ_ONLY, img_format, (128, 256))
do_test(img)
def allocate_texture(ctx, shape, hostbuf=None, support_1D=False):
"""
Allocate an OpenCL image ("texture").
:param ctx: OpenCL context
:param shape: Shape of the image. Note that pyopencl and OpenCL < 1.2
do not support 1D images, so 1D images are handled as 2D with one row
:param support_1D: force the image to be 1D if the shape has only one dim
"""
if len(shape) == 1 and not (support_1D):
shape = (1, ) + shape
return pyopencl.Image(
ctx,
pyopencl.mem_flags.READ_ONLY | pyopencl.mem_flags.USE_HOST_PTR,
pyopencl.ImageFormat(pyopencl.channel_order.INTENSITY,
pyopencl.channel_type.FLOAT),
hostbuf=numpy.zeros(shape[::-1], dtype=numpy.float32))
def frame_preprocessing(self, lower_bound, upper_bound):
# *Load and convert source image
frame = np.array(self.frame)
# *Set properties
h = frame.shape[0]
w = frame.shape[1]
mask = np.zeros((1, 2), cl.cltypes.float4)
mask[0, 0] = (lower_bound) # Lower bound
mask[0, 1] = (upper_bound) # Upper bound
# *Buffors
frame_buf = cl.image_from_array(GPUSetup.context, frame, 4)
fmt = cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.UNSIGNED_INT8)
dest_buf = cl.Image(GPUSetup.context,
cl.mem_flags.WRITE_ONLY,
fmt,
shape=(w, h))
# *RGB to HSV
GPUSetup.program.rgb2hsv(GPUSetup.queue, (w, h), None, frame_buf,
dest_buf)
self.hsv = np.empty_like(frame)
cl.enqueue_copy(GPUSetup.queue,
self.hsv,
dest_buf,
origin=(0, 0),
region=(w, h))
# *Apply mask
frame_buf = cl.image_from_array(GPUSetup.context, self.hsv, 4)
mask_buf = cl.Buffer(GPUSetup.context,
cl.mem_flags.READ_ONLY
| cl.mem_flags.COPY_HOST_PTR,
hostbuf=mask)
GPUSetup.program.hsv_mask(GPUSetup.queue, (w, h), None, frame_buf,
mask_buf, dest_buf)
self.after_mask = np.empty_like(frame)
cl.enqueue_copy(GPUSetup.queue,
self.after_mask,
dest_buf,
origin=(0, 0),
region=(w, h))
return self.after_mask
def compute(self, lock, cl_context, cl_queue):
super(COP2_HalfTone, self).compute()
if self.hasInputs():
self.devOutBuffer = cl.Image(cl_context, cl.mem_flags.READ_WRITE, self.image_format, shape=self.input(0).shape())
self.width = self.xRes()
self.height = self.yRes()
exec_evt = self.program.filter(cl_queue, (self.width, self.height), None,
self.input(0).getCookedData(),
self.devOutBuffer,
numpy.int32(self.input(0).xRes()),
numpy.int32(self.input(0).yRes()),
numpy.float32(self.parm("density").eval()),
numpy.int32(self.parm("quality").eval()),
numpy.int32(self.parm("mode").evalAsInt()),
)
exec_evt.wait()
else:
raise BaseException("No input specified !!!")
def _make_constant_cl_args(self):
self.n_iters_cl = cl.Buffer(
self.CTX,
self.MF.READ_ONLY|self.MF.COPY_HOST_PTR,
hostbuf=np.array([self.n_iters]).astype(np.int32)
)
self.size_cl = cl.Buffer(
self.CTX,
self.MF.READ_ONLY|self.MF.COPY_HOST_PTR,
hostbuf=np.array((self.width+self.height*1j,)).astype(np.complex64)
)
image_fmt = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.UNSIGNED_INT8)
self.image_cl = cl.Image(
self.CTX,
self.MF.WRITE_ONLY, image_fmt,
shape=(self.width, self.height)
)
def get_similar_oclPtr_object(img):
global ocl
mf = cl.mem_flags
opencl_device = None
if (isinstance(img.get_oclPtr(), cl.Image)):
#print("get_similar_oclPtr_object: oclPtr is cl.Image.")
imgFormat = cl.ImageFormat(vl.cl_channel_order(img),
vl.cl_channel_type(img))
opencl_device = cl.Image(ocl.context, mf.WRITE_ONLY, imgFormat,
img.get_oclPtr().shape)
elif isinstance(img.get_oclPtr(), cl.Buffer):
#print("get_similar_oclPtr_object: oclPtr is cl.Buffer.")
opencl_device = cl.Buffer(ocl.context, mf.WRITE_ONLY,
img.get_ipl().nbytes)
return opencl_device
def alloc_image(ctx: cl.Context, dim: tuple, flags=cl.mem_flags.READ_WRITE):
endianness = get_endianness(ctx)
if endianness == "both":
raise RuntimeError(
"Context has both little and big endian devices, which is not currently supported"
)
elif endianness == sys.byteorder:
order = cl.channel_order.BGRA
else:
if endianness == "little":
order = cl.channel_order.BGRA
else:
order = cl.channel_order.ARGB
fmt = cl.ImageFormat(order, cl.channel_type.UNORM_INT8)
return numpy.empty((*dim, 4), dtype=numpy.uint8), cl.Image(ctx,
flags,
fmt,
shape=dim)
def compute(self):
self.width, self.height = self.input(0).size
self.devOutBuffer = cl.Image(self.engine.ctx,
self.engine.mf.READ_WRITE,
self.image_format,
shape=(self.width, self.height))
sampler = cl.Sampler(
self.engine.ctx,
True, # Normalized coordinates
cl.addressing_mode.CLAMP_TO_EDGE,
cl.filter_mode.LINEAR)
exec_evt = self.program.run_blend(
self.engine.queue, self.size, None,
self.input(0).getOutDevBuffer(),
self.input(1).getOutDevBuffer(), self.devOutBuffer, sampler,
numpy.int32(self.width), numpy.int32(self.height),
numpy.float32(self.parm("factor").evalAsFloat()))
exec_evt.wait()
def parallel_prediction_errors(self, image):
""" Get the MILC prediction errors for a 3D image by means of OpenCL accelerated computation
Keyword arguments:
image -- a 3D numpy array (bitmap image)
Return:
a 3D numpy array of the same shape of "image", containing the prediction errors
"""
mf = cl.mem_flags
# Define the image format for the prediction errors
err_format = cl.ImageFormat(channel_order=cl.channel_order.R,
channel_type=DataType.CL_ERR.value)
# Define the input image from the numpy 3D array
source_image = cl.image_from_array(self.ctx, image)
original_shape = numpy.shape(image)
cl_shape = list(
reversed(original_shape)) # inverted shape (pyOpenCL bug?)
# output image
output_image = cl.Image(self.ctx,
mf.WRITE_ONLY,
err_format,
shape=cl_shape)
# sampler. pixels out of range have a value of '0'
sampler = cl.Sampler(self.ctx, False, cl.addressing_mode.CLAMP,
cl.filter_mode.NEAREST)
# enqueue kernel
self.program.image_test(self.queue, original_shape, None, source_image,
output_image, sampler)
# read the resulting image into a numpy array
output_data = numpy.empty(shape=cl_shape, dtype=DataType.ERR.value)
cl.enqueue_read_image(self.queue, output_image, (0, 0, 0), cl_shape,
output_data)
return output_data.reshape(original_shape)
def main():
CL_CODE = '''
constant float R_weight = 0.6;
constant float G_weight = 0.4;
constant float B_weight = 0.8;
constant float ALL_weight = 1.8;
constant sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
CLK_ADDRESS_CLAMP |
CLK_FILTER_NEAREST;
kernel void gray(__read_only image2d_t src_img, __write_only image2d_t dst_img) {
int x = get_global_id(0);
int y = get_global_id(1);
int2 coord = (int2)(x, y);
uint4 pixel = read_imageui(src_img, sampler, coord);
uint g = (uint)((pixel[0] * R_weight + pixel[1] * G_weight + pixel[2] * B_weight) / ALL_weight);
pixel = g;
pixel[3] = 255;
write_imageui(dst_img, coord, pixel);
}
'''
plf = [(cl.context_properties.PLATFORM, cl.get_platforms()[0])]
ctx = cl.Context(dev_type=cl.device_type.GPU, properties=plf)
prg = cl.Program(ctx, CL_CODE).build()
queue = cl.CommandQueue(ctx)
mf = cl.mem_flags
src_raw = np.asarray(Image.open('res/tile-z16.png').convert("RGBA"))
src_img = cl.image_from_array(ctx, src_raw, 4)
(w, h, _) = src_raw.shape
image_size = (w, h)
fmt = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.UNSIGNED_INT8)
dst_img = cl.Image(ctx, mf.WRITE_ONLY, fmt, shape=image_size)
dst_raw = np.empty_like(src_raw)
prg.gray(queue, image_size, (1, 1), src_img, dst_img)
cl.enqueue_copy(queue, dst_raw, dst_img, origin=(0, 0), region=image_size)
Image.fromarray(dst_raw).show()
def convert(self, img):
src = numpy.fromstring(img.bits().asstring(img.byteCount()),
dtype=numpy.uint8)
src.shape = h, w, _ = img.height(), img.width(), 4
mf = cl.mem_flags
src_buf = cl.image_from_array(self.ctx, src, 4)
fmt = cl.ImageFormat(cl.channel_order.RGBA,
cl.channel_type.UNSIGNED_INT8)
dest_buf = cl.Image(self.ctx, mf.WRITE_ONLY, fmt, shape=(w, h))
self.prg.convert(self.queue, (w, h), None, src_buf, dest_buf,
numpy.int32(w), numpy.int32(h))
dest = numpy.empty_like(src)
cl.enqueue_copy(self.queue,
dest,
dest_buf,
origin=(0, 0),
region=(w, h))
return QtGui.QImage(str(dest.data), w, h, QtGui.QImage.Format_RGB32)
def circles2rgb(circles, shape, backgroundColor, scale=1):
scaleShape = (int(shape[0] * scale), int(shape[1] * scale))
circlesBuffer = cl.Buffer(ctx,
mf.READ_ONLY | mf.COPY_HOST_PTR,
hostbuf=np.array(circles,
dtype=np.int32).ravel())
dstUintImage = cl.Image(ctx, mf.READ_WRITE, uint8Format, shape=scaleShape)
temp = np.zeros(scaleShape[1::-1] + (4, ), dtype=np.uint8)
prg.drawCircles(queue, scaleShape, None, dstUintImage, circlesBuffer,
np.uint8(len(circles)), np.uint8(backgroundColor),
np.uint8(scale))
cl.enqueue_copy(queue,
temp,
dstUintImage,
origin=(0, 0),
region=scaleShape).wait()
dstUintImage.release()
circlesBuffer.release()
return temp
def __init__(self):
self.dst = np.empty((N, N, 4)).astype(np.uint8)
self.dst_buf = cl.Buffer(context, mf.WRITE_ONLY, self.dst.nbytes)
self.inv_matrix = cl.Buffer(context, mf.READ_ONLY, 16 * 4)
self.matrix = cl.Buffer(context, mf.READ_ONLY, 16 * 4)
with open('kernel.cl', 'r') as f:
self.program = cl.Program(context,
f.read()).build("-cl-mad-enable")
print self.program.get_build_info(context.devices[0],
cl.program_build_info.LOG)
self.dstTex = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, self.dstTex)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, N, N, 0, GL_RGBA,
GL_UNSIGNED_BYTE, None)
glBindTexture(GL_TEXTURE_2D, 0)
print_info(self.program, cl.program_info)
print_info(self.program.pdbTracer, cl.kernel_info)
grid = np.array(range(256), dtype=np.float32) / 256
x1, x2 = np.meshgrid(grid, grid)
rad = np.sqrt(x1)
phi = 2 * np.pi * x2
phimap = np.dstack((np.cos(phi) * rad, np.sin(phi) * rad,
np.sqrt(1 - rad * rad), 0 * rad))
self.p = phimap
fmt = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.FLOAT)
self.phimap = cl.Image(context,
mf.READ_ONLY | mf.COPY_HOST_PTR,
fmt,
shape=phimap.shape[:2],
hostbuf=np.array(phimap, order='C'))
def compute(self, lock, cl_context, cl_queue):
super(COP2_Render, self).compute()
self.image_width = self.parm("size1").eval()
self.image_height = self.parm("size2").eval()
print("render init")
self.renderer.init(self.image_width, self.image_height, 16)
print("rendering")
image_array = np.flip(self.renderer.renderFrame(), (0, 1))
print("rendering done")
try:
print("dev buffer")
self.devOutBuffer = cl.Image(
cl_context,
cl.mem_flags.READ_WRITE | cl.mem_flags.COPY_HOST_PTR,
self.image_format,
shape=(self.image_width, self.image_height),
hostbuf=image_array.astype("float32"))
except:
raise
def __init__(self, image_width, image_height, opencl_file, gl_image=None):
enable_gl_sharing = gl_image is not None
init_opencl(enable_gl_sharing)
with open(opencl_file, 'r') as f:
source = f.read()
self._program = cl.Program(
context,
source).build(options=['-I', f'"{os.path.dirname(opencl_file)}"'])
if gl_image is None:
shape = (image_height, image_width)
fmt = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.UNORM_INT8)
self._result_image = cl.Image(context, mem.WRITE_ONLY, fmt, shape)
else:
from OpenGL.GL import GL_TEXTURE_2D
self._result_image = cl.GLTexture(context,
mem.WRITE_ONLY,
GL_TEXTURE_2D,
0,
gl_image,
dims=2)