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#include "opencl_mesh_kit.hpp"
// TODO : print streamsdk::getOpenCLErrorCodeStr(res)
#define CL_RETURN_VAL_IF_FAIL(val, expr) do { \
cl_int res=(expr); \
if ( res != CL_SUCCESS ) { \
std::cerr << "file " << __FILE__ << ": line " << __LINE__ << " (" << __PRETTY_FUNCTION__ \
<< "): '" << "expr" << "' failed (return code : " << res << ")" << std::endl; \
return val; \
} \
} while(0)
cl_int OpenCLMeshKit::initCL(intptr_t gl_display, intptr_t gl_context, intptr_t gl_vbo, size_t meshWidth, size_t meshHeight, size_t groupSize) {
cl_uint id, numPlatforms;
cl_int res;
char pbuf[100];
cl_platform_id *platforms, platform;
bool usableDeviceFound=false;
this->meshWidth = meshWidth;
this->meshHeight = meshHeight;
this->groupSize = groupSize;
// Get platform count
CL_RETURN_VAL_IF_FAIL(10,
clGetPlatformIDs(0, NULL, &numPlatforms)
);
std::cout << "Detected " << numPlatforms << " platform(s)" << std::endl;
if ( ! ( numPlatforms > 0 ) ) return 2;
// Allocate room for all platform IDs
platforms = new cl_platform_id[numPlatforms];
// Get platform IDs
CL_RETURN_VAL_IF_FAIL(11,
clGetPlatformIDs(numPlatforms, platforms, &numPlatforms)
);
// Enumerate platforms and grab informations
for(id=0;id<numPlatforms;id++) {
platform=platforms[id];
CL_RETURN_VAL_IF_FAIL(12,
clGetPlatformInfo(platform, CL_PLATFORM_VENDOR, sizeof(pbuf), pbuf, NULL)
);
std::cout << "Platform " << id << " : " << pbuf << std::endl;
// Dynamically get the function pointer for clGetGLConetextInfoKHR
clGetGLContextInfoKHR_fn clGetGLContextInfoKHR_proc = (clGetGLContextInfoKHR_fn) clGetExtensionFunctionAddressForPlatform(platform, "clGetGLContextInfoKHR");
if (!clGetGLContextInfoKHR_proc) {
std::cerr << "clGetExtensionFunctionAddressForPlatform(platform, clGetGLContextInfoKHR) failed" << std::endl;
continue;
}
// Try to get the device corresponding to the GL context/display on this platform
cl_context_properties cpsGL[] = {
CL_CONTEXT_PLATFORM, (cl_context_properties)platform,
CL_GLX_DISPLAY_KHR, gl_display,
CL_GL_CONTEXT_KHR, gl_context,
0
};
std::cout << "cl_context_properties cpsGL :" << std::endl;
std::cout << "\tCL_CONTEXT_PLATFORM :" << (void *)cpsGL[1] << std::endl;
std::cout << "\tCL_GLX_DISPLAY_KHR :" << (void *)cpsGL[3] << std::endl;
std::cout << "\tCL_GL_CONTEXT_KHR :" << (void *)cpsGL[5] << std::endl;
size_t deviceSize=0;
// get deviceSize (should be 1*sizeof(cl_device_id) with CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR)
res=clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,0,NULL,&deviceSize);
if ( res!=CL_SUCCESS || deviceSize!=1*sizeof(cl_device_id)) {
std::cerr << "clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,0,...) failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
cl_dev=0;
res=clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,deviceSize,&cl_dev,NULL);
if ( res!=CL_SUCCESS || cl_dev==0 ) {
std::cerr << "clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR," << deviceSize << ",...) failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
std::cout << "cl_device :" << (void *)cl_dev << std::endl;
cl_ctx = clCreateContext(cpsGL,1,&cl_dev,0,0,&res);
if ( res!=CL_SUCCESS ) {
std::cerr << "clCreateContext() failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
cl_cq = clCreateCommandQueue(cl_ctx,cl_dev,0,&res);
if ( res!=CL_SUCCESS ) {
std::cerr << "clCreateCommandQueue() failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
usableDeviceFound=true;
break;
}
if (! usableDeviceFound) {
std::cerr << "No OpenCL device has been successfully initialized" << std::endl;
return 13;
}
cl_vbo = clCreateFromGLBuffer(cl_ctx, CL_MEM_WRITE_ONLY, gl_vbo, &res);
if ( res!=CL_SUCCESS ) {
std::cerr << "clCreateFromGLBuffer(..., gl_vbo, &res) failed" << std::endl;
return 14;
}
std::cout << "OpenCL initialization done." << std::endl;
return 0;
}
cl_int OpenCLMeshKit::compileKernels(std::list<std::string> names, const char source[], size_t sourceLen) {
cl_int res=0;
const char *p_source=source;
cl_program program = clCreateProgramWithSource(cl_ctx, 1, &p_source, &sourceLen,&res);
if ( res!=CL_SUCCESS ) {
std::cerr << "Failed to clCreateProgramWithSource(<source of zero_z kernel>)" << std::endl;
return 21;
}
res = clBuildProgram(program, 1, &cl_dev, "", NULL, NULL);
if ( res!=CL_SUCCESS ) {
std::cerr << "Failed to clBuildProgram()" << std::endl;
return 22;
}
for (std::list<std::string>::iterator ii = names.begin(); ii != names.end(); ++ii) {
std::string kName = (*ii);
char *kNameZTS = new char[kName.length()+1];
std::strcpy(kNameZTS, kName.c_str());
cl_kernel kernel = clCreateKernel(program,kNameZTS,&res);
delete [] kNameZTS;
if ( res!=CL_SUCCESS ) {
std::cerr << "Failed to clCreateKernel(program,\"" << kName << "\",&res);" << std::endl;
return 23;
}
kernels[kName]=kernel;
}
return 0;
}
cl_int OpenCLMeshKit::execKernel(std::string kernelName) {
/*TODO
cl_int execKernel(cl_context cl_ctx, cl_command_queue commandQueue, cl_kernel kernel, size_t mesh_width, size_t mesh_height, size_t group_size, cl_mem cl_vbo, float time) {
cl_int res;
cl_event eventND[1];
// Set local and global work group sizes
size_t globalWorkSize[2], localWorkSize[2];
globalWorkSize[0]=mesh_width;
globalWorkSize[1]=mesh_height;
localWorkSize[0]=group_size;
localWorkSize[1]=1;
res=clEnqueueAcquireGLObjects(commandQueue, 1, &cl_vbo, 0, 0, NULL);
res=clSetKernelArg(kernel, 0, sizeof(cl_mem), &cl_vbo); // float4 *pos
res=clSetKernelArg(kernel, 1, sizeof(cl_uint), (void *)&mesh_width);
res=clSetKernelArg(kernel, 2, sizeof(cl_uint), (void *)&mesh_height);
res=clSetKernelArg(kernel, 3, sizeof(float), &time);
// Execute kernel on given device
res=clEnqueueNDRangeKernel(commandQueue, kernel, 2, NULL, globalWorkSize, localWorkSize, 0, NULL, eventND);
if ( res != CL_SUCCESS ) {
fputs("Failed to clEnqueueNDRangeKernel()\n", stderr);
return 1;
}
res=clFlush(commandQueue);
res=clWaitForEvents(1,eventND); //XXX: SimpleGL utilise une attente active, pourquoi ?
res=clReleaseEvent(eventND[0]);
res=clEnqueueReleaseGLObjects(commandQueue, 1, &cl_vbo, 0, 0, 0);
res=clFinish(commandQueue);
return CL_SUCCESS;
}
*/
return 0;
}
void OpenCLMeshKit::releaseKernels() {
for (std::map<std::string,cl_kernel>::iterator ii = kernels.begin(); ii != kernels.end(); ++ii ) {
clReleaseKernel((*ii).second);
}
kernels.clear();
}
cl_int OpenCLMeshKit::resetVBO() {
cl_int res;
std::map<std::string, cl_kernel> user_kernels=kernels;
std::list<std::string> n; n.push_back("zero_z");
res = compileKernels(n, kernel_src_zero_z, sizeof(kernel_src_zero_z));
if(res==0) res = execKernel("zero_z");
releaseKernels();
kernels=user_kernels;
return res;
}
void OpenCLMeshKit::setGroupSize(size_t groupSize) {
this->groupSize=groupSize;
}
OpenCLMeshKit::~OpenCLMeshKit() { }
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