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#include "common.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define IMG_SIZE 100
#define TOL 1e-8
#define MAX_ERRORS 8
const char* KERNEL_SOURCE =
"__kernel void image_copy(__read_only image2d_array_t src, \n"
" __write_only image2d_array_t dst) \n"
"{ \n"
" size_t size = get_image_array_size(src); \n"
" const int x = get_global_id(0); \n"
" const int y = get_global_id(1); \n"
" const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE | \n"
" CLK_ADDRESS_CLAMP | \n"
" CLK_FILTER_NEAREST; \n"
" float4 pixel = read_imagef(src, sampler, (int4)(x, y, 0, 0)); \n"
" write_imagef(dst, (int4)(x, y, 0, 0), pixel); \n"
"} \n";
int main()
{
cl_int err;
cl_kernel kernel;
cl_image_format img_fmt;
cl_image_desc img_desc;
cl_mem src, dst;
float *input, *output;
size_t width, height;
width = height = 10;
size_t origin[] = {0, 0, 0};
size_t region[] = {width, height, 1};
size_t GWSize[] = {width, height, 1};
input = (float*)malloc(IMG_SIZE * 3 * sizeof(float));
output = (float*)malloc(IMG_SIZE * 3 * sizeof(float));
// Create Input data
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < IMG_SIZE; ++j)
{
input[i * IMG_SIZE + j] = j + 1.0;
}
}
Context cl = createContext(KERNEL_SOURCE, "");
kernel = clCreateKernel(cl.program, "image_copy", &err);
checkError(err, "creating kernel");
img_fmt.image_channel_order = CL_RGB;
img_fmt.image_channel_data_type = CL_FLOAT;
img_desc.image_type = CL_MEM_OBJECT_IMAGE2D;
img_desc.image_width = width;
img_desc.image_height = height;
img_desc.image_depth = 0;
img_desc.image_array_size = 0;
img_desc.image_row_pitch = 0;
img_desc.image_slice_pitch = 0;
img_desc.num_mip_levels = 0;
img_desc.num_samples = 0;
img_desc.buffer = NULL;
src = clCreateImage(cl.context, CL_MEM_READ_ONLY, &img_fmt, &img_desc, NULL,
&err);
checkError(err, "creating source image");
dst = clCreateImage(cl.context, CL_MEM_READ_WRITE, &img_fmt, &img_desc, NULL,
&err);
checkError(err, "creating destination image");
err = clEnqueueWriteImage(cl.queue, src, CL_TRUE, origin, region, 0, 0, input,
0, NULL, NULL);
checkError(err, "enqueuing write image");
err = clSetKernelArg(kernel, 0, sizeof(cl_mem), &src);
err |= clSetKernelArg(kernel, 1, sizeof(cl_mem), &dst);
checkError(err, "setting kernel args");
err = clEnqueueNDRangeKernel(cl.queue, kernel, 2, NULL, GWSize, NULL, 0, NULL,
NULL);
checkError(err, "enqueuing kernel");
err = clFinish(cl.queue);
checkError(err, "running kernel");
err = clEnqueueReadImage(cl.queue, dst, CL_TRUE, origin, region, 0, 0, output,
0, NULL, NULL);
checkError(err, "reading image data");
// Check results
unsigned errors = 0;
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < IMG_SIZE; ++j)
{
float ref = input[i * IMG_SIZE + j];
float val = output[i * IMG_SIZE + j];
if (fabs(ref - val) > TOL)
{
if (errors < MAX_ERRORS)
{
fprintf(stderr, "%4d: %.4f != %.4f\n", i, val, ref);
}
errors++;
}
}
}
free(input);
free(output);
clReleaseMemObject(src);
clReleaseMemObject(dst);
clReleaseKernel(kernel);
releaseContext(cl);
return (errors != 0);
}
// cl_mem image3;
//
// image3 = clCreateImage2D(context, CL_MEM_READ_WRITE, &img_fmt, width, height,
// 0, 0, &err);
//
//// copy Image1 to Image3
// err = clEnqueueCopyImage(command_queue, image1, image3, origin, origin,
// region, 1, event, &event[3]); err_check(err, "clEnqueueCopyImage");
// clReleaseMemObject(image3);
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