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#define CL_TARGET_OPENCL_VERSION 110
#include <stdlib.h>
#include <stdio.h>
#include <GL/glut.h>
#include <GL/glx.h>
#include <CL/cl_gl.h>
#include "sysfatal.h"
#define PROG_FILE "balls.cl"
#define KERNEL_FUNC "balls"
enum { WIDTH = 640, HEIGHT = 480 };
void initGL(int argc, char *argv[]);
void initCL(void);
char *readFile(const char *filename, size_t *size);
static cl_context context;
static cl_command_queue queue;
static cl_kernel kernel;
int
main(int argc, char *argv[]) {
initGL(argc, argv);
initCL();
clReleaseContext(context);
}
void
initGL(int argc, char *argv[]) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowSize(WIDTH, HEIGHT);
glutCreateWindow("Balls");
glClearColor(1, 1, 1, 1);
}
void
initCL(void) {
cl_platform_id platform;
cl_device_id device;
cl_int err;
cl_program prog;
char *progBuf, *progLog;
size_t progSize, logSize;
/* Get platform. */
if (clGetPlatformIDs(1, &platform, NULL) < 0)
sysfatal("No OpenCL platform available.\n");
/* Configure properties for OpenGL interoperability. */
#ifdef WINDOWS
cl_context_properties properties[] = {
CL_GL_CONTEXT_KHR, (cl_context_properties) wglGetCurrentContext(),
CL_GLX_DISPLAY_KHR, (cl_context_properties) wctlGetCurrentDC(),
CL_CONTEXT_PLATFORM, (cl_context_properties) platform,
0
};
#else
cl_context_properties properties[] = {
CL_GL_CONTEXT_KHR, (cl_context_properties) glXGetCurrentContext(),
CL_GLX_DISPLAY_KHR, (cl_context_properties) glXGetCurrentDisplay(),
CL_CONTEXT_PLATFORM, (cl_context_properties) platform,
0
};
#endif
/* Get GPU device. */
if (clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, NULL) < 0)
sysfatal("No GPUs available.\n");
/* Create context. */
context = clCreateContext(properties, 1, &device, NULL, NULL, &err);
if (err < 0)
sysfatal("Failed to create context.\n");
/* Create program from file. */
progBuf = readFile(PROG_FILE, &progSize);
prog = clCreateProgramWithSource(context, 1, (const char **) &progBuf, &progSize, &err);
if (err < 0)
sysfatal("Failed to create program.\n");
free(progBuf);
/* Build program. */
err = clBuildProgram(prog, 0, NULL, NULL, NULL, NULL);
if (err < 0) {
/* Print build log. */
clGetProgramBuildInfo(prog, device, CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);
progLog = malloc(logSize + 1);
progLog[logSize] = '\0';
clGetProgramBuildInfo(prog, device, CL_PROGRAM_BUILD_LOG, logSize+1, progLog, NULL);
fprintf(stderr, "%s\n", progLog);
free(progLog);
exit(1);
}
/* Create command queue. */
queue = clCreateCommandQueue(context, device, 0, &err);
if (err < 0)
sysfatal("Failed to create command queue.\n");
/* Create kernel. */
kernel = clCreateKernel(prog, KERNEL_FUNC, &err);
if (err < 0)
sysfatal("Failed to create kernel: %d\n", err);
}
char *
readFile(const char *filename, size_t *size) {
FILE *f;
char *buf;
if ((f = fopen(filename, "r")) == NULL)
sysfatal("Failed to open file '%s'\n", filename);
fseek(f, 0, SEEK_END);
*size = ftell(f);
if ((buf = malloc((*size + 1) * sizeof(char))) == NULL) {
fclose(f);
sysfatal("Failed to allocate file buffer for '%s'\n", filename);
}
rewind(f);
fread(buf, sizeof(char), *size, f);
buf[*size] = '\0';
fclose(f);
return buf;
}
void
configSharedData(void) {
}
void
execKernel(void) {
}
void
display(void) {
}
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