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package com.jogamp.opencl.demos.julia3d;
import com.jogamp.opencl.CLBuffer;
import com.jogamp.opencl.CLCommandQueue;
import com.jogamp.opencl.CLContext;
import com.jogamp.opencl.CLDevice;
import com.jogamp.opencl.CLKernel;
import com.jogamp.opencl.CLPlatform;
import com.jogamp.opencl.CLProgram;
import com.jogamp.opencl.demos.julia3d.structs.Camera;
import com.jogamp.opencl.demos.julia3d.structs.RenderingConfig;
import com.jogamp.opencl.demos.julia3d.structs.Vec;
import java.io.IOException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import javax.media.opengl.GLProfile;
import javax.swing.SwingUtilities;
import static com.jogamp.opencl.CLMemory.Mem.*;
import static com.jogamp.opencl.CLProgram.CompilerOptions.*;
import static com.jogamp.opencl.demos.julia3d.UserSceneController.*;
/**
* This sample has been ported from David Buciarelli's juliaGPU v1.2 written in C.
* @author Michael Bien
*/
public class Julia3d {
private final CLContext context;
private CLBuffer<FloatBuffer> pixelBuffer;
private final CLBuffer<ByteBuffer> configBuffer;
private final CLCommandQueue commandQueue;
private final CLProgram program;
private final CLKernel julia;
private final CLKernel multiply;
private final int workGroupSize;
private final String kernelFileName = "rendering_kernel.cl";
final RenderingConfig config;
private Julia3d(RenderingConfig renderConfig) {
this.config = renderConfig;
updateCamera();
//setup, prefere GPUs
CLDevice device = CLPlatform.getDefault().getMaxFlopsDevice(CLDevice.Type.GPU);
if(device == null) {
device = CLPlatform.getDefault().getMaxFlopsDevice();
}
context = CLContext.create(device);
workGroupSize = 256;
//allocate buffers
configBuffer = context.createBuffer(config.getBuffer(), READ_ONLY);
commandQueue = device.createCommandQueue();
// update(true);
try {
program = context.createProgram(Julia3d.class.getResourceAsStream(kernelFileName))
.build(FAST_RELAXED_MATH);
} catch (IOException ex) {
throw new RuntimeException("unable to load program from source", ex);
}
julia = program.createCLKernel("JuliaGPU");
multiply = program.createCLKernel("multiply");
System.out.println(program.getBuildStatus(device));
System.out.println(program.getBuildLog());
}
void update(boolean reallocate) {
updateCamera();
int bufferSize = config.getWidth() * config.getHeight() * 3;
if(reallocate) {
if(pixelBuffer != null) {
pixelBuffer.release();
}
pixelBuffer = context.createFloatBuffer(bufferSize, READ_WRITE, USE_BUFFER);
}
commandQueue.putWriteBuffer(configBuffer, true);
julia.putArg(pixelBuffer)
.putArg(configBuffer)
.rewind();
multiply.putArg(pixelBuffer)
.putArg(bufferSize)
.rewind();
}
void compute(boolean fastRendering) {
// calculate workgroup size
int globalThreads = config.getWidth() * config.getHeight();
if(globalThreads % workGroupSize != 0)
globalThreads = (globalThreads / workGroupSize + 1) * workGroupSize;
int localThreads = workGroupSize;
int superSamplingSize = config.getSuperSamplingSize();
if (!fastRendering && superSamplingSize > 1) {
for (int y = 0; y < superSamplingSize; ++y) {
for (int x = 0; x < superSamplingSize; ++x) {
float sampleX = (x + 0.5f) / superSamplingSize;
float sampleY = (y + 0.5f) / superSamplingSize;
if (x == 0 && y == 0) {
// First pass
julia.setArg(2, 0)
.setArg(3, sampleX)
.setArg(4, sampleY);
commandQueue.put1DRangeKernel(julia, 0, globalThreads, localThreads);
} else if (x == (superSamplingSize - 1) && y == (superSamplingSize - 1)) {
// Last pass
julia.setArg(2, 1)
.setArg(3, sampleX)
.setArg(4, sampleY);
// normalize the values we accumulated
multiply.setArg(2, 1.0f/(superSamplingSize*superSamplingSize));
commandQueue.put1DRangeKernel(julia, 0, globalThreads, localThreads)
.put1DRangeKernel(multiply, 0, globalThreads*3, localThreads);
} else {
julia.setArg(2, 1)
.setArg(3, sampleX)
.setArg(4, sampleY);
commandQueue.put1DRangeKernel(julia, 0, globalThreads, localThreads);
}
}
}
}else{
//fast rendering
julia.setArg(2, 0)
.setArg(3, 0.0f)
.setArg(4, 0.0f);
commandQueue.put1DRangeKernel(julia, 0, globalThreads, localThreads);
}
commandQueue.putBarrier()
.putReadBuffer(pixelBuffer, true);
}
private void updateCamera() {
Camera camera = config.getCamera();
Vec dir = camera.getDir();
Vec target = camera.getTarget();
Vec camX = camera.getX();
Vec camY = camera.getY();
Vec orig = camera.getOrig();
vsub(dir, target, orig);
vnorm(dir);
Vec up = Vec.create().setX(0).setY(1).setZ(0);
vxcross(camX, dir, up);
vnorm(camX);
vmul(camX, config.getWidth() * .5135f / config.getHeight(), camX);
vxcross(camY, camX, dir);
vnorm(camY);
vmul(camY, .5135f, camY);
}
CLDevice getDevice() {
return commandQueue.getDevice();
}
public static void main(String[] args) {
GLProfile.initSingleton();
RenderingConfig config = RenderingConfig.create()
.setWidth(640).setHeight(480)
.setEnableShadow(1)
.setSuperSamplingSize(2)
.setActvateFastRendering(1)
.setMaxIterations(9)
.setEpsilon(0.003f * 0.75f)
.setLight(new float[] {5, 10, 15})
.setMu(new float[] {-0.2f, 0.4f, -0.4f, -0.4f});
config.getCamera().getOrig() .setX(1).setY(2).setZ(8);
config.getCamera().getTarget().setX(0).setY(0).setZ(0);
final Julia3d julia3d = new Julia3d(config);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new Renderer(julia3d);
}
});
}
Buffer getPixelBuffer() {
return pixelBuffer.getBuffer();
}
void release() {
context.release();
}
}
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