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-rw-r--r--src/render_opencl.c297
1 files changed, 297 insertions, 0 deletions
diff --git a/src/render_opencl.c b/src/render_opencl.c
new file mode 100644
index 0000000..9d650c2
--- /dev/null
+++ b/src/render_opencl.c
@@ -0,0 +1,297 @@
+/*
+ * render_opencl.c
+ *
+ * Created on: 26.01.2018
+ * Author: Superleo1810
+ */
+
+#include "render_opencl.h"
+
+void init_opencl(OpenCLConfig *config)
+{
+ printf("cl init\n");
+ x_min_s = -2.0;
+ x_max_s = 1.0;
+ y_min_s = -1.0;
+ y_max_s = 1.0;
+ x_min = x_min_s;
+ x_max = x_max_s;
+ y_min = y_min_s;
+ y_max = y_max_s;
+
+ config_opencl = config;
+ output = (cl_uint *) malloc((config_opencl->width) * (config_opencl->height) * sizeof(cl_uchar4));
+ context = NULL;
+
+ cl_platform_id platform_id;
+ cl_uint ret_num_devices;
+ cl_uint ret_num_platforms;
+ size_t device_list_size;
+ cl_program program;
+ size_t cl_src_sz;
+
+ clGetPlatformIDs(1, &platform_id, &ret_num_platforms);
+ clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_DEFAULT, 1, &device_id, &ret_num_devices);
+ context = clCreateContext(NULL, 1, &device_id, NULL, NULL, &ret);
+ ret = clGetContextInfo(context, CL_CONTEXT_DEVICES, 0, NULL, &device_list_size);
+ devices = (cl_device_id *)malloc(device_list_size);
+ num_devices = (cl_uint)(device_list_size/sizeof(cl_device_id));
+ clGetContextInfo(context, CL_CONTEXT_DEVICES, device_list_size, devices, NULL);
+
+ printf("lists done\n");
+
+ FILE *fp;
+ char *cl_src, *path, *flags = (char *)malloc(200 * sizeof(char));
+ flags[0] = '\0';
+ switch(config_opencl->fpu)
+ {
+ case OPENCL_FPU_32:
+ switch(config_opencl->set_func)
+ {
+ case SFUNC_JULIA:
+ path = "cl/julia32.cl";
+ break;
+ case SFUNC_MANDELBROT:
+ default:
+ path = "cl/mandelbrot32.cl";
+ break;
+ }
+ break;
+ case OPENCL_FPU_64:
+ switch(config_opencl->set_func)
+ {
+ case SFUNC_JULIA:
+ path = "cl/julia64.cl";
+ break;
+ case SFUNC_MANDELBROT:
+ default:
+ path = "cl/mandelbrot64.cl";
+ break;
+ }
+ int khrFP64 = 0;
+ int amdFP64 = 0;
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ char deviceExtensions[8192];
+ ret = clGetDeviceInfo(devices[i], CL_DEVICE_EXTENSIONS,
+ sizeof(deviceExtensions), deviceExtensions, 0);
+ if (strstr(deviceExtensions, "cl_khr_fp64"))
+ {
+ khrFP64++;
+ }
+ else
+ {
+ if (strstr(deviceExtensions, "cl_amd_fp64"))
+ {
+ amdFP64++;
+ }
+ }
+ }
+ if (khrFP64 == num_devices)
+ {
+ flags = strcat(flags, "-D KHR_DP_EXTENSION ");
+ }
+ else if (amdFP64 == num_devices)
+ {
+ flags = strcat(flags, "");
+ }
+ break;
+ case OPENCL_FPU_128:
+ printf("128 bit precision not implemented yet\n");
+ break;
+ }
+
+ cl_src = (char *)malloc(MAX_SOURCE_SIZE * sizeof(char));
+ fp = fopen(path, "r");
+ cl_src_sz = fread(cl_src, 1, MAX_SOURCE_SIZE, fp);
+ fclose(fp);
+
+ printf("reading done\n");
+
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ cl_command_queue_properties prop = 0;
+ // if (sampleArgs->timing)
+ // {
+ // prop |= CL_QUEUE_PROFILING_ENABLE;
+ // }
+ commandQueue[i] = clCreateCommandQueue(context, devices[i], prop, &ret);
+ outputBuffer[i] = clCreateBuffer(context,
+ CL_MEM_WRITE_ONLY | CL_MEM_ALLOC_HOST_PTR,
+ (sizeof(cl_uint) * (config_opencl->width)
+ * (config_opencl->height)) / num_devices, NULL, &ret);
+ }
+ printf("comand puffer\n");
+ if (config_opencl->fma)
+ {
+ flags = strcat(flags, "-D MUL_ADD=fma ");
+ }
+ else
+ {
+ flags = strcat(flags, "-D MUL_ADD=mad ");
+ }
+ printf("flags concat\n");
+ program = clCreateProgramWithSource(context, 1, (const char **)&cl_src, (const size_t *)&cl_src_sz, &ret);
+ ret = clBuildProgram(program, num_devices, devices, flags, NULL, NULL);
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ kernel_vector[i] = clCreateKernel(program, "calculate", &ret);
+ }
+
+ printf("cl init done\n");
+
+}
+
+void render_opencl(void)
+{
+ cl_event events[MAX_DEVICES];
+ cl_int eventStatus = CL_QUEUED;
+ size_t globalThreads[1];
+ size_t localThreads[1];
+ size_t kernelWorkGroupSize;
+ cl_kernel kernel;
+
+ globalThreads[0] = ((config_opencl->width) * (config_opencl->height))
+ / num_devices;
+ localThreads[0] = 256;
+
+ globalThreads[0] >>= 2;
+
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ kernel = kernel_vector[i];
+ ret = clGetKernelWorkGroupInfo(kernel, devices[i],
+ CL_KERNEL_WORK_GROUP_SIZE, sizeof(size_t), &kernelWorkGroupSize,
+ 0);
+ if ((cl_uint) (localThreads[0]) > kernelWorkGroupSize)
+ {
+ localThreads[0] = kernelWorkGroupSize;
+ }
+
+ xpos = 0.0;
+ ypos = 0.0;
+ xsize = 0.1;
+ ysize = 0.1;
+
+ xstep = (xsize / (double) config_opencl->width);
+ ystep = (ysize / (double) config_opencl->height);
+ leftx = (xpos - xsize / 2.0);
+ topy =
+ (ypos + ysize / 2.0
+ - ((double) i * ysize) / (double) num_devices);
+
+ if (i == 0)
+ {
+ topy0 = topy;
+ }
+
+ printf("xsize: %f, ysize: %f, xstep: %f, ystep: %f, leftx: %f, topy: %f\n", xsize, ysize, xstep, ystep, leftx, topy);
+
+ ret = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *) &outputBuffer[i]);
+
+ cl_float leftxF = (float) leftx;
+ cl_float topyF = (float) topy;
+ cl_float xstepF = (float) xstep;
+ cl_float ystepF = (float) ystep;
+
+ switch (config_opencl->fpu)
+ {
+ case OPENCL_FPU_32: // lel
+ ret = clSetKernelArg(kernel, 1, sizeof(cl_float), (void *) &leftxF);
+ ret = clSetKernelArg(kernel, 2, sizeof(cl_float), (void *) &topyF);
+ ret = clSetKernelArg(kernel, 3, sizeof(cl_float), (void *) &xstepF);
+ ret = clSetKernelArg(kernel, 4, sizeof(cl_float), (void *) &ystepF);
+ break;
+ case OPENCL_FPU_64:
+ ret = clSetKernelArg(kernel, 1, sizeof(cl_double), (void *) &leftx);
+ ret = clSetKernelArg(kernel, 2, sizeof(cl_double), (void *) &topy);
+ ret = clSetKernelArg(kernel, 3, sizeof(cl_double), (void *) &xstep);
+ ret = clSetKernelArg(kernel, 4, sizeof(cl_double), (void *) &ystep);
+ break;
+ case OPENCL_FPU_128:
+ break;
+ }
+
+ ret = clSetKernelArg(kernel, 5, sizeof(cl_uint),
+ (void *) &config_opencl->iterations);
+ ret = clSetKernelArg(kernel, 6, sizeof(cl_int),
+ (void *) &config_opencl->width);
+ ret = clEnqueueNDRangeKernel(commandQueue[i], kernel, 1, NULL,
+ globalThreads, localThreads, 0, NULL, &events[i]);
+
+
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ ret = clFlush(commandQueue[i]);
+ }
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ ret = clWaitForEvents(1, &events[num_devices - i - 1]);
+ ret = clReleaseEvent(events[num_devices - i - 1]);
+ }
+
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ ret = clEnqueueReadBuffer(commandQueue[i], outputBuffer[i],
+ CL_FALSE, 0,
+ ((config_opencl->width) * (config_opencl->height)
+ * sizeof(u32)) / num_devices,
+ config_opencl->arr
+ + (((config_opencl->width) * (config_opencl->height) * i)
+ / num_devices), 0,
+ NULL, &events[i]);
+ }
+
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ ret = clFlush(commandQueue[i]);
+ }
+
+ for (cl_uint i = 0; i < num_devices; i++)
+ {
+ ret = clWaitForEvents(1, &events[num_devices - i - 1]);
+ ret = clReleaseEvent(events[num_devices - i - 1]);
+ }
+ }
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glBindTexture(GL_TEXTURE_2D, config_opencl->tex);
+ glEnable(GL_TEXTURE_2D);
+
+ glBegin(GL_QUADS);
+ glTexCoord2i(0, 0); glVertex2i(0, 0);
+ glTexCoord2i(0, 1); glVertex2i(0, config_opencl->height);
+ glTexCoord2i(1, 1); glVertex2i(config_opencl->width, config_opencl->height);
+ glTexCoord2i(1, 0); glVertex2i(config_opencl->width, 0);
+ glEnd();
+
+ glDisable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, 0);
+ glutSwapBuffers();
+}
+
+void idle_opencl(void)
+{
+ static int t_old;
+ int t = 0, delta = 0;
+ do
+ {
+ t = glutGet(GLUT_ELAPSED_TIME);
+ delta = t - t_old;
+ } while (delta < 16); // TODO: Hardcoded FPS
+ t_old = t;
+
+ //glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_2D, config_opencl->tex);
+ //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, config_opencl->width,
+ config_opencl->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, config_opencl->arr);
+ glBindTexture(GL_TEXTURE_2D, 0);
+ cl_ft += (config_opencl->speed * (delta / 1000.0));
+ x_min = x_min_s + config_opencl->zoom_func(cl_ft, (d64) 2.0 + config_opencl->to_x);
+ y_min = y_min_s + config_opencl->zoom_func(cl_ft, (d64) 1.0 + config_opencl->to_y);
+ x_max = x_max_s - config_opencl->zoom_func(cl_ft, (d64) 1.0 - config_opencl->to_x);
+ y_max = y_max_s - config_opencl->zoom_func(cl_ft, (d64) 1.0 - config_opencl->to_y);
+ glutPostRedisplay();
+}
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