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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;
this->gl_vbo = gl_vbo;
// 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(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, "-Werror", NULL, NULL);
if ( res!=CL_SUCCESS ) {
std::cerr << "Failed to clBuildProgram()" << std::endl;
// Shows the log
char* build_log;
size_t log_size;
// First call to know the proper size
clGetProgramBuildInfo(program, cl_dev, CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size);
build_log = new char[log_size+1];
// Second call to get the log
clGetProgramBuildInfo(program, cl_dev, CL_PROGRAM_BUILD_LOG, log_size, build_log, NULL);
build_log[log_size] = '\0';
std::cerr << build_log << std::endl;
delete[] build_log;
return 22;
}
char *p_word;
int state=0;
char *source2=strdup(source); // strtok will alter the source2 string
char *strtok_arg1=source2;
// Trivial parsing of source to find every kernel name and register them
res=CL_SUCCESS;
while ( res == CL_SUCCESS && ( p_word=strtok(strtok_arg1, "\n\r\t (") ) != NULL ) {
strtok_arg1=NULL; // strtok need it's first arg NULL after the first call
switch(state) {
case 0: // Searching "__kernel"
if ( strcmp(p_word, "__kernel")==0 ) {
state=1;
}
break;
case 1: // Skipping kernel return type (void)
state=2;
break;
case 2: // Grabbing kernel name and register it
cl_kernel kernel = clCreateKernel(program,p_word,&res);
if ( res!=CL_SUCCESS ) {
std::cerr << "Failed to clCreateKernel(program,\""
<< p_word << "\",&res);" << std::endl;
}
kernels[std::string(p_word)]=kernel;
state=0;
break;
}
}
delete[] source2;
return res;
}
cl_int OpenCLMeshKit::execKernel(std::string kernelName, float karg_time) {
//cl_int res;
cl_event eventND[1];
size_t globalWorkSize[2], localWorkSize[2];
cl_kernel kernel;
//struct timespec before, after;
//clock_gettime(CLOCK_MONOTONIC_RAW, &before);
std::map<std::string,cl_kernel>::iterator ii=this->kernels.find(kernelName);
if ( ii==this->kernels.end() ) {
std::cerr << "execKernel(\"" << kernelName << "\", " << karg_time \
<< ") failed : no kernel found with this name" << std::endl;
return -1;
}
kernel=this->kernels[kernelName];
// Set local and global work group sizes
globalWorkSize[0]=this->meshWidth;
globalWorkSize[1]=this->meshHeight;
localWorkSize[0]=this->groupSize;
localWorkSize[1]=1;
CL_RETURN_VAL_IF_FAIL(1,
clEnqueueAcquireGLObjects(this->cl_cq, 1, &(this->cl_vbo), 0, 0, NULL)
);
clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *)&(this->cl_vbo)); // float4 *pos
clSetKernelArg(kernel, 1, sizeof(cl_uint), (void *)&(this->meshWidth));
clSetKernelArg(kernel, 2, sizeof(cl_uint), (void *)&(this->meshHeight));
clSetKernelArg(kernel, 3, sizeof(float), (void *)&karg_time);
// Execute kernel on given device
CL_RETURN_VAL_IF_FAIL(2,
clEnqueueNDRangeKernel(this->cl_cq, kernel, 2, NULL, globalWorkSize, localWorkSize, 0, NULL, eventND)
);
//TODO : return values checking
CL_RETURN_VAL_IF_FAIL(3,
clFlush(this->cl_cq)
);
// (CPU) Wait until GPU kernel execution end
CL_RETURN_VAL_IF_FAIL(4, clWaitForEvents(1,eventND) ); //XXX: SimpleGL utilise une attente active, pourquoi ?
CL_RETURN_VAL_IF_FAIL(5, clReleaseEvent(eventND[0]) );
CL_RETURN_VAL_IF_FAIL(6,
clEnqueueReleaseGLObjects(this->cl_cq, 1, &(this->cl_vbo), 0, 0, 0)
);
CL_RETURN_VAL_IF_FAIL(7, clFinish(this->cl_cq) );
//clock_gettime(CLOCK_MONOTONIC_RAW, &after);
//TODO : remove this debug hint
//std::cout << "kernel exec time : " << after.tv_nsec - before.tv_nsec << std::endl;
return CL_SUCCESS;
}
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;
res = compileKernels(kernel_src_zero_z, sizeof(kernel_src_zero_z)-1);
if(res==0) res = execKernel("zero_z", 0.0f);
releaseKernels();
kernels=user_kernels;
return res;
}
size_t OpenCLMeshKit::getMeshWidth() { return this->meshWidth; }
size_t OpenCLMeshKit::getMeshHeight() { return this->meshHeight; }
size_t OpenCLMeshKit::getMeshItemCount() { return this->meshWidth * this->meshHeight; }
size_t OpenCLMeshKit::getGroupSize() { return this->groupSize; }
intptr_t OpenCLMeshKit::getGLVBO() { return this->gl_vbo; }
void OpenCLMeshKit::setGroupSize(size_t groupSize) { this->groupSize=groupSize; }
OpenCLMeshKit::~OpenCLMeshKit() { }
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