DPCT1059
Message
SYCL only supports 4-channel image format. Adjust the code.
Detailed Help
SYCL* supports only 4-channel image format. The warning is emitted, when the tool
generates code with unsupported image format, which corresponds to the original
code. You can fix the resulting code by changing the image format. Note: suggested
workaround may impact code performance.
For example, the following migrated DPC++ code:
// migrated DPC++ code, which is using unsupported image format:
dpct::image_wrapper<cl::sycl::uint2, 2> tex; // 2-channel image is not supported
void test_image(dpct::image_accessor_ext<cl::sycl::uint2, 2> acc) {
cl::sycl::uint2 tex_data;
tex_data = acc.read(0, 0);
}
int main() {
... dpct::get_default_queue().submit([&](cl::sycl::handler &cgh) {
... auto acc = tex.get_access(cgh);
auto smpl = tex.get_sampler();
... cgh.single_task<class dpct_single_kernel>([=] {
test_image(dpct::image_accessor_ext<cl::sycl::uint2, 2>(smpl, acc));
});
});
...
}is manually adjusted to:
// manually adjusted code:
dpct::image_wrapper<cl::sycl::uint4, 2> tex;
void test_image(dpct::image_accessor_ext<cl::sycl::uint4, 2> acc) {
cl::sycl::uint4 tex_data;
tex_data = acc.read(0, 0);
}
int main() {
... dpct::get_default_queue().submit([&](cl::sycl::handler &cgh) {
... auto acc = tex.get_access(cgh);
auto smpl = tex.get_sampler();
... cgh.single_task<class dpct_single_kernel>([=] {
test_image(dpct::image_accessor_ext<cl::sycl::uint4, 2>(smpl, acc));
});
});
...
}Suggestions to Fix
You may need to rewrite this code.