OpenCL host code
// OpenCL functions, constants, etc. are also highlighted in OpenCL host code in the c or cpp language
cl::Event KernelFilterImages::runSingle(const cl::Image2D& imgSrc, SPImage2D& imgDst)
{
const size_t rows = imgSrc.getImageInfo<CL_IMAGE_HEIGHT>();
const size_t cols = imgSrc.getImageInfo<CL_IMAGE_WIDTH>();
ASSERT(rows > 0 && cols > 0, "The image object seems to be invalid, no rows/cols set");
ASSERT(imgSrc.getImageInfo<CL_IMAGE_FORMAT>().image_channel_data_type == CL_FLOAT, "Only float type images are supported");
ASSERT(imgSrc.getInfo<CL_MEM_FLAGS>() == CL_MEM_READ_ONLY || imgSrc.getInfo<CL_MEM_FLAGS>() == CL_MEM_READ_WRITE, "Can't read the input image");
imgDst = std::make_shared<cl::Image2D>(*context, CL_MEM_READ_WRITE, cl::ImageFormat(CL_R, CL_FLOAT), cols, rows);
cl::Kernel kernel(*program, "filter_single");
kernel.setArg(0, imgSrc);
kernel.setArg(1, *imgDst);
kernel.setArg(2, bufferKernel1);
kernel.setArg(3, kernel1.rows);
kernel.setArg(4, kernel1.rows / 2);
kernel.setArg(5, kernel1.cols);
kernel.setArg(6, kernel1.cols / 2);
kernel.setArg(7, border);
cl::Event eventFilter;
const cl::NDRange global(cols, rows);
queue->enqueueNDRangeKernel(kernel, cl::NullRange, global, cl::NullRange, &events, &eventFilter);
}