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#include "rendercoord.hpp"
#include <algorithm>
#include <qobject.h>
#include <iostream>
#include <qrgb.h>
#include <qsemaphore.h>
#include <render.hpp>
#include <sstream>
uint32_t colorToUint32(const Color &c) {
Color cnew = Color(c);
cnew.clamp();
return (0xFF << 24) +
(cnew.r() << 16) +
(cnew.g() << 8) +
cnew.b();
}
// Run by main thread
RenderThread::RenderThread(Renderer r, unsigned threads, QObject *parent, unsigned id)
: QThread(parent),
m_lock(1),
m_render(r),
m_pause(1)
{
m_id = id;
m_workers = threads;
}
// Run on new thread
void RenderThread::run() {
while (1) {
// Wait for work
m_work.acquire();
// Very expensive, but necesary to get live rendering
Color *sum = new Color[m_render.m_width * m_render.m_height];
m_current_samples = 0;
for (int sample = 0; sample < m_samples; sample++) {
m_current_samples = sample;
// Probably not that smart
m_pause.acquire();
m_pause.release();
for (unsigned y = m_id; y < m_render.m_height; y += m_workers) {
for (unsigned x = 0; x < m_render.m_width; x++) {
auto index = x + y * m_render.m_width;
sum[index] += m_render.render(m_render.m_width - x, m_render.m_height - y, 1);
m_writebuffer[index] = colorToUint32(sum[index] / (sample+1));
}
}
}
// Signal done
m_lock.release();
emit done(m_id);
}
}
void RenderThread::pause() {
m_pause.acquire();
}
void RenderThread::resume() {
m_pause.release();
}
int RenderThread::render(QRgb *buffer, unsigned samples) {
// Check if already running
if (!m_lock.tryAcquire()) {
return 1;
}
m_writebuffer = buffer;
m_samples = samples;
m_work.release();
return 0;
}
unsigned RenderThread::stop() {
stopAt(m_current_samples);
return m_current_samples;
}
void RenderThread::stopAt(int at) {
m_samples = at;
}
// Running on main thread
unsigned RenderThread::current_samples() {
// No sync should not be a problem here.
return m_current_samples;
}
RenderCoordinator::RenderCoordinator(QObject *parent, DrawWidget &target, Renderer r, QLabel *status)
: QObject(parent),
m_target(target),
m_renderer(r),
m_timer(this)
{
m_status = status;
// Create and start workers
for (int i = 0; i < 4; i++) {
auto thread = new RenderThread(m_renderer, 4, this, i);
thread->start();
QObject::connect(thread, &RenderThread::done, this, &RenderCoordinator::workerDone);
m_workers.push_back(thread);
}
render();
}
void RenderCoordinator::render() {
m_started = 0;
for (auto thd : m_workers) {
thd->render(m_target.m_drawbuffer, 20);
m_started++;
}
m_state = running;
updateUi();
QObject::connect(&m_timer, &QTimer::timeout, this, &RenderCoordinator::updateUi);
m_timer.start(500);
}
void RenderCoordinator::stop() {
unsigned max = 0;
for (auto thd : m_workers) {
thd->pause();
auto val = thd->current_samples();
if (val>max) {
max = val;
}
}
std::cout << max << std::endl;
for (auto thd : m_workers) {
thd->stopAt(max+1);
thd->resume();
}
m_state = stopping;
updateUi();
}
void RenderCoordinator::workerDone(unsigned workerid) {
std::cout << "Worker " << workerid << " done!" << std::endl;
if (--m_started) {
return;
}
std::cout << "All done :-)" << std::endl;
// All workers are done
m_state = stopped;
m_timer.stop();
updateUi();
}
unsigned RenderCoordinator::calcStats(unsigned *max, unsigned *min, double *avg) {
unsigned count = 0;
unsigned sum = 0;
for (auto thd : m_workers) {
auto val = thd->current_samples();
if (min && (val < *min || !count)) {
*min = val;
}
if (max && (val > *max || !count)) {
*max = val;
}
sum += val;
count++;
}
if (avg) {
*avg = (double)sum / count;
}
return count;
}
void RenderCoordinator::updateUi() {
m_target.repaint();
if (!m_status) {
return;
}
// Gather statictics from workers
unsigned max;
unsigned min;
double avg;
unsigned count = calcStats(&max, &min, &avg);
std::ostringstream status;
status << states[m_state] <<
" Threads: " << count <<
" Max: " << max << " samples" <<
" Min: " << min << " samples" <<
" Avg: " << avg << " samples";
m_status->setText(QString::fromStdString(status.str()));
}
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