attempts at folding opencl support in

2019-10-28 18:21:20 +11:00
parent 3fb53586d4
commit 401aff52a8
22 changed files with 399 additions and 0 deletions
@@ -0,0 +1,128 @@
+#include "openclbackend.h"
+
+OpenCLBackend::OpenCLBackend()
+{
+
+}
+
+bool OpenCLBackend::Init()
+{
+  // Get platform and device information
+  cl_platform_id platform_id = nullptr;
+  cl_uint ret_num_devices;
+  cl_uint ret_num_platforms;
+  cl_int ret = clGetPlatformIDs(1, &platform_id, &ret_num_platforms);
+  ret = clGetDeviceIDs( platform_id, CL_DEVICE_TYPE_GPU, 1,
+                        &device_id_, &ret_num_devices);
+
+  if (ret != CL_SUCCESS) {
+    qWarning() << "Failed to find compatible OpenCL device";
+    return false;
+  }
+
+  // Create an OpenCL context
+  context_ = clCreateContext(nullptr, 1, &device_id_, nullptr, nullptr, &ret);
+
+  // Create a command queue
+  //command_queue_ = clCreateCommandQueue(context_, device_id_, 0, &ret);
+
+  return true;
+}
+
+void OpenCLBackend::GenerateFrame(const rational &time)
+{
+  Q_UNUSED(time)
+  /*
+  // Copy the lists A and B to their respective memory buffers
+  cl_int ret = clEnqueueWriteBuffer(command_queue_, a_mem_obj, CL_TRUE, 0,
+                             BITMAP_SZ, source_bmp, 0, NULL, NULL);
+
+  // Set the arguments of the kernel
+  ret = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *)&a_mem_obj);
+  ret = clSetKernelArg(kernel, 1, sizeof(cl_mem), (void *)&c_mem_obj);
+
+  // Execute the OpenCL kernel on the list
+  size_t global_item_size = BITMAP_SZ; // Process the entire lists
+  size_t local_item_size = 30; // Divide work items into groups of 64
+  ret = clEnqueueNDRangeKernel(command_queue_, kernel, 1, NULL,
+                               &global_item_size, &local_item_size, 0, NULL, NULL);
+
+  if (ret != CL_SUCCESS) {
+    fprintf(stderr, "Failed to run\n");
+    exit(1);
+  }
+
+  // Read the memory buffer C on the device to the local variable C
+  ret = clEnqueueReadBuffer(command_queue_, c_mem_obj, CL_TRUE, 0,
+                            BITMAP_SZ, dest_bmp, 0, NULL, NULL);
+
+  // Clean up
+  ret = clFlush(command_queue_);
+  ret = clFinish(command_queue_);
+  */
+}
+
+void OpenCLBackend::Close()
+{
+  Decompile();
+
+  cl_int ret;
+
+  /*ret = clReleaseKernel(kernel);
+  ret = clReleaseMemObject(a_mem_obj);
+  ret = clReleaseMemObject(c_mem_obj);*/
+  ret = clReleaseCommandQueue(command_queue_);
+  ret = clReleaseContext(context_);
+}
+
+void OpenCLBackend::Decompile()
+{
+  clReleaseProgram(program_);
+}
+
+void OpenCLBackend::Compile()
+{
+  /*
+  cl_int ret;
+
+  // Create memory buffers on the device for each vector
+  cl_mem a_mem_obj = clCreateBuffer(context_, CL_MEM_READ_ONLY, BITMAP_SZ, nullptr, &ret);
+  cl_mem c_mem_obj = clCreateBuffer(context_, CL_MEM_WRITE_ONLY, BITMAP_SZ, nullptr, &ret);
+
+  // Create a program from the kernel source
+  program_ = clCreateProgramWithSource(context_,
+                                       1,
+                                       (const char **)&source_str,
+                                       (const size_t *)&source_size,
+                                       &ret);
+
+  // Build the program
+  ret = clBuildProgram(program_, 1, &device_id_, nullptr, nullptr, nullptr);
+
+  if (ret != CL_SUCCESS) {
+    // Decompile failed, the user will probably want to know why
+    size_t error_len = 0;
+
+    clGetProgramBuildInfo(program_, device_id_, CL_PROGRAM_BUILD_LOG, 0, nullptr, &error_len);
+    char* err = new char[error_len];
+    clGetProgramBuildInfo(program_, device_id_, CL_PROGRAM_BUILD_LOG, error_len, err, nullptr);
+
+    SetError(err);
+    //fprintf(stderr, "%s\n", err);
+
+    delete [] err;
+  }
+
+  // Create the OpenCL kernel
+  cl_kernel kernel = clCreateKernel(program_, "vector_add", &ret);
+  */
+}
+
+void OpenCLBackend::GenerateCode()
+{
+  if (viewer_node() == nullptr) {
+    return;
+  }
+
+
+}