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#include "qmapboxgl_map_renderer.hpp"
#include "qmapboxgl_scheduler.hpp"
#include <QThreadStorage>
#include <QtGlobal>
static bool needsToForceScheduler() {
static QThreadStorage<bool> force;
if (!force.hasLocalData()) {
force.setLocalData(mbgl::Scheduler::GetCurrent() == nullptr);
}
return force.localData();
};
static auto *getScheduler() {
static QThreadStorage<std::shared_ptr<QMapboxGLScheduler>> scheduler;
if (!scheduler.hasLocalData()) {
scheduler.setLocalData(std::make_shared<QMapboxGLScheduler>());
}
return scheduler.localData().get();
};
QMapboxGLMapRenderer::QMapboxGLMapRenderer(qreal pixelRatio,
mbgl::DefaultFileSource &fs, mbgl::ThreadPool &tp, QMapboxGLSettings::GLContextMode mode)
: m_renderer(std::make_unique<mbgl::Renderer>(m_backend, pixelRatio, fs, tp, static_cast<mbgl::GLContextMode>(mode)))
, m_forceScheduler(needsToForceScheduler())
{
// If we don't have a Scheduler on this thread, which
// is usually the case for render threads, use a shared
// dummy scheduler that needs to be explicitly forced to
// process events.
if (m_forceScheduler) {
auto scheduler = getScheduler();
if (mbgl::Scheduler::GetCurrent() == nullptr) {
mbgl::Scheduler::SetCurrent(scheduler);
}
connect(scheduler, SIGNAL(needsProcessing()), this, SIGNAL(needsRendering()));
}
}
QMapboxGLMapRenderer::~QMapboxGLMapRenderer()
{
MBGL_VERIFY_THREAD(tid);
}
void QMapboxGLMapRenderer::updateParameters(std::shared_ptr<mbgl::UpdateParameters> newParameters)
{
std::lock_guard<std::mutex> lock(m_updateMutex);
m_updateParameters = std::move(newParameters);
}
void QMapboxGLMapRenderer::updateFramebuffer(quint32 fbo, const mbgl::Size &size)
{
MBGL_VERIFY_THREAD(tid);
m_backend.updateFramebuffer(fbo, size);
}
void QMapboxGLMapRenderer::render()
{
MBGL_VERIFY_THREAD(tid);
std::shared_ptr<mbgl::UpdateParameters> params;
{
// Lock on the parameters
std::lock_guard<std::mutex> lock(m_updateMutex);
if (!m_updateParameters) {
return;
}
// Hold on to the update parameters during render
params = m_updateParameters;
}
// The OpenGL implementation automatically enables the OpenGL context for us.
mbgl::BackendScope scope(m_backend, mbgl::BackendScope::ScopeType::Implicit);
m_renderer->render(*params);
if (m_forceScheduler) {
getScheduler()->processEvents();
}
}
void QMapboxGLMapRenderer::setObserver(std::shared_ptr<mbgl::RendererObserver> observer)
{
m_renderer->setObserver(observer.get());
}
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