Forge

opencl/bubblechart.cpp
/*******************************************************
* Copyright (c) 2015-2019, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <forge.h>
#include "cl_helpers.h"
#include <cmath>
#include <ctime>
#include <vector>
#include <sstream>
#include <iostream>
#include <iterator>
#include <algorithm>
using namespace cl;
using namespace std;
const unsigned DIMX = 1000;
const unsigned DIMY = 800;
static const float DX = 0.1f;
static const float FRANGE_START = 0.f;
static const float FRANGE_END = 2 * 3.141592f;
static const int DATA_SIZE = (int)((FRANGE_END - FRANGE_START) / DX);
#define USE_FORGE_OPENCL_COPY_HELPERS
#include <ComputeCopy.h>
static const std::string chartKernels =
R"EOK(
float rand(int x)
{
x = (x << 13) ^ x;
return ( 1.0 - ( (x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0);
}
kernel
void randKernel(global float* out, unsigned seed, float min, float scale, int DATA_SIZE)
{
int id = get_global_id(0);
if (id<DATA_SIZE)
out[id] = scale * (1+rand(seed*id))/2.0f + min;
}
kernel
void colorsKernel(global float* out, unsigned rseed, unsigned gseed, unsigned bseed, int DATA_SIZE)
{
int id = get_global_id(0);
if (id<DATA_SIZE) {
out[3*id+0] = (1+rand(rseed * id))/2.0f;
out[3*id+1] = (1+rand(gseed * id))/2.0f;
out[3*id+2] = (1+rand(bseed * id))/2.0f;
}
}
kernel
void mapKernel(global float* out, int functionCode, float FRANGE_START, float DX, int DATA_SIZE)
{
int id = get_global_id(0);
float x = FRANGE_START + id*DX;
float y;
switch(functionCode) {
case 0: y = cos(x); break;
case 1: y = tan(x); break;
default: y = sin(x); break;
}
if (id<DATA_SIZE) {
out[2*id+0] = x;
out[2*id+1] = y;
}
}
)EOK";
inline int divup(int a, int b)
{
return (a+b-1)/b;
}
void kernel(cl::Buffer& devOut, int fnCode, int outFlags,
cl::Buffer& colorsOut, cl::Buffer& alphasOut, cl::Buffer& radiiOut,
cl::CommandQueue& queue, cl::Device& device)
{
static bool compileFlag = true;
static cl::Program prog;
static cl::Kernel randKernel, colorsKernel, mapKernel;
std::srand((unsigned)(std::time(0)));
if (compileFlag) {
try {
prog = cl::Program(queue.getInfo<CL_QUEUE_CONTEXT>(), chartKernels, false);
std::vector<cl::Device> devs;
devs.push_back(device);
prog.build(devs);
randKernel = cl::Kernel(prog, "randKernel");
colorsKernel = cl::Kernel(prog, "colorsKernel");
mapKernel = cl::Kernel(prog, "mapKernel");
} catch (cl::Error err) {
std::cout << "Compile Errors: " << std::endl;
std::cout << err.what() << err.err() << std::endl;
std::cout << prog.getBuildInfo<CL_PROGRAM_BUILD_LOG>(device) << std::endl;
exit(255);
}
std::cout<< "Kernels compiled successfully" << std::endl;
compileFlag = false;
}
static const NDRange local(32);
NDRange global(local[0] * divup(DATA_SIZE, (int)(local[0])));
mapKernel.setArg(0, devOut);
mapKernel.setArg(1, fnCode);
mapKernel.setArg(2, FRANGE_START);
mapKernel.setArg(3, DX);
mapKernel.setArg(4, DATA_SIZE);
queue.enqueueNDRangeKernel(mapKernel, cl::NullRange, global, local);
if (outFlags & 0x00000001) {
colorsKernel.setArg(0, colorsOut);
colorsKernel.setArg(1, std::rand());
colorsKernel.setArg(2, std::rand());
colorsKernel.setArg(3, std::rand());
colorsKernel.setArg(4, DATA_SIZE);
queue.enqueueNDRangeKernel(colorsKernel, cl::NullRange, global, local);
}
if (outFlags & 0x00000002) {
randKernel.setArg(0, alphasOut);
randKernel.setArg(1, std::rand());
randKernel.setArg(2, 0.0f);
randKernel.setArg(3, 1.0f);
randKernel.setArg(4, DATA_SIZE);
queue.enqueueNDRangeKernel(randKernel, cl::NullRange, global, local);
}
if (outFlags & 0x00000004) {
randKernel.setArg(0, radiiOut);
randKernel.setArg(1, std::rand());
randKernel.setArg(2, 20.0f);
randKernel.setArg(3, 60.0f);
randKernel.setArg(4, DATA_SIZE);
queue.enqueueNDRangeKernel(randKernel, cl::NullRange, global, local);
}
}
int main(void)
{
try {
/*
* First Forge call should be a window creation call
* so that necessary OpenGL context is created for any
* other forge::* object to be created successfully
*/
forge::Window wnd(DIMX, DIMY, "Bubble chart with Transparency Demo");
wnd.makeCurrent();
forge::Chart chart(FG_CHART_2D);
chart.setAxesLimits(FRANGE_START, FRANGE_END, -1.0f, 1.0f);
/* Create several plot objects which creates the necessary
* vertex buffer objects to hold the different plot types
*/
forge::Plot plt1 = chart.plot(DATA_SIZE, forge::f32, FG_PLOT_LINE, FG_MARKER_TRIANGLE);
forge::Plot plt2 = chart.plot(DATA_SIZE, forge::f32, FG_PLOT_LINE, FG_MARKER_CIRCLE);
/* Set plot colors */
plt1.setColor(FG_RED);
plt2.setColor(FG_GREEN); //use a forge predefined color
/* Set plot legends */
plt1.setLegend("Cosine");
plt2.setLegend("Tangent");
/* set plot global marker size */
plt1.setMarkerSize(20);
/*
* Helper function to create a CLGL interop context.
* This function checks for if the extension is available
* and creates the context on the appropriate device.
* Note: context and queue are defined in cl_helpers.h
*/
context = createCLGLContext(wnd);
Device device = context.getInfo<CL_CONTEXT_DEVICES>()[0];
queue = CommandQueue(context, device);
GfxHandle* handles[5];
// create GL-OpenCL interop buffers
createGLBuffer(&handles[0], plt1.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[1], plt2.vertices(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[2], plt2.colors(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[3], plt2.alphas(), FORGE_VERTEX_BUFFER);
createGLBuffer(&handles[4], plt2.radii(), FORGE_VERTEX_BUFFER);
cl::Buffer cosOut(context, CL_MEM_READ_WRITE, sizeof(float) * DATA_SIZE * 2);
cl::Buffer tanOut(context, CL_MEM_READ_WRITE, sizeof(float) * DATA_SIZE * 2);
cl::Buffer colorsOut(context, CL_MEM_READ_WRITE, sizeof(float) * DATA_SIZE * 3);
cl::Buffer alphasOut(context, CL_MEM_READ_WRITE, sizeof(float) * DATA_SIZE);
cl::Buffer radiiOut(context, CL_MEM_READ_WRITE, sizeof(float) * DATA_SIZE);
cl::Buffer dummy;
kernel(cosOut, 0, 0, dummy, dummy, dummy, queue, device);
kernel(tanOut, 1, 0x00000007, colorsOut, alphasOut, radiiOut, queue, device);
/* copy your data into the opengl buffer object exposed by
* forge::Plot class and then proceed to rendering.
* To help the users with copying the data from compute
* memory to display memory, Forge provides copy headers
* along with the library to help with this task
*/
copyToGLBuffer(handles[0], (ComputeResourceHandle)cosOut(), plt1.verticesSize());
copyToGLBuffer(handles[1], (ComputeResourceHandle)tanOut(), plt2.verticesSize());
/* update color value for tan graph */
copyToGLBuffer(handles[2], (ComputeResourceHandle)colorsOut(), plt2.colorsSize());
/* update alpha values for tan graph */
copyToGLBuffer(handles[3], (ComputeResourceHandle)alphasOut(), plt2.alphasSize());
/* update marker sizes for tan graph markers */
copyToGLBuffer(handles[4], (ComputeResourceHandle)radiiOut(), plt2.radiiSize());
do {
wnd.draw(chart);
} while(!wnd.close());
// destroy GL-OpenCL Interop buffer
releaseGLBuffer(handles[0]);
releaseGLBuffer(handles[1]);
releaseGLBuffer(handles[2]);
releaseGLBuffer(handles[3]);
releaseGLBuffer(handles[4]);
} catch (forge::Error err) {
std::cout << err.what() << "(" << err.err() << ")" << std::endl;
} catch (cl::Error err) {
std::cout << err.what() << "(" << err.err() << ")" << std::endl;
}
return 0;
}