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#include <mbgl/renderer/renderer_impl.hpp>
#include <mbgl/actor/scheduler.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/renderer/render_style.hpp>
#include <mbgl/renderer/painter.hpp>
#include <mbgl/renderer/update_parameters.hpp>
#include <mbgl/map/transform_state.hpp>
#include <mbgl/map/backend_scope.hpp>
namespace mbgl {
static RendererObserver& nullObserver() {
static RendererObserver observer;
return observer;
}
Renderer::Impl::Impl(Backend& backend_,
float pixelRatio_,
FileSource& fileSource_,
Scheduler& scheduler_,
GLContextMode contextMode_,
const optional<std::string> programCacheDir_)
: backend(backend_)
, observer(&nullObserver())
, contextMode(contextMode_)
, pixelRatio(pixelRatio_),
programCacheDir(programCacheDir_)
, renderStyle(std::make_unique<RenderStyle>(scheduler_, fileSource_)) {
renderStyle->setObserver(this);
}
Renderer::Impl::~Impl() {
BackendScope guard { backend, backend.getScopeType()};
renderStyle.reset();
};
void Renderer::Impl::setObserver(RendererObserver* observer_) {
observer = observer_ ? observer_ : &nullObserver();
}
void Renderer::Impl::render(View& view, const UpdateParameters& updateParameters) {
// Don't load/render anyting in still mode until explicitly requested.
if (updateParameters.mode == MapMode::Still && !updateParameters.stillImageRequest) return;
BackendScope guard { backend, backend.getScopeType() };
// Update render style
renderStyle->update(updateParameters);
// Initialize painter
if (!painter) {
gl::Context& context = backend.getContext();
painter = std::make_unique<Painter>(context,
pixelRatio,
programCacheDir);
}
// Update transform state on painter.
painter->state = updateParameters.transformState;
bool loaded = updateParameters.styleLoaded && renderStyle->isLoaded();
if (updateParameters.mode == MapMode::Continuous) {
if (renderState == RenderState::Never) {
observer->onWillStartRenderingMap();
}
observer->onWillStartRenderingFrame();
FrameData frameData { updateParameters.timePoint,
pixelRatio,
updateParameters.mode,
contextMode,
updateParameters.debugOptions };
backend.updateAssumedState();
painter->render(*renderStyle, frameData, view);
painter->cleanup();
observer->onDidFinishRenderingFrame(
loaded ? RendererObserver::RenderMode::Full : RendererObserver::RenderMode::Partial,
renderStyle->hasTransitions() || painter->needsAnimation()
);
if (!loaded) {
renderState = RenderState::Partial;
} else if (renderState != RenderState::Fully) {
renderState = RenderState::Fully;
observer->onDidFinishRenderingMap();
}
} else if (loaded) {
// We can render the map in still mode
observer->onWillStartRenderingMap();
observer->onWillStartRenderingFrame();
FrameData frameData { updateParameters.timePoint,
pixelRatio,
updateParameters.mode,
contextMode,
updateParameters.debugOptions };
backend.updateAssumedState();
painter->render(*renderStyle, frameData, view);
observer->onDidFinishRenderingFrame(RendererObserver::RenderMode::Full, false);
observer->onDidFinishRenderingMap();
// Cleanup only after signaling completion
painter->cleanup();
}
}
std::vector<Feature> Renderer::Impl::queryRenderedFeatures(const ScreenLineString& geometry, const RenderedQueryOptions& options) const {
if (!painter) return {};
return renderStyle->queryRenderedFeatures(geometry, painter->state, options);
}
std::vector<Feature> Renderer::Impl::querySourceFeatures(const std::string& sourceID, const SourceQueryOptions& options) const {
const RenderSource* source = renderStyle->getRenderSource(sourceID);
if (!source) return {};
return source->querySourceFeatures(options);
}
void Renderer::Impl::onInvalidate() {
observer->onInvalidate();
};
void Renderer::Impl::onResourceError(std::exception_ptr ptr) {
observer->onResourceError(ptr);
}
void Renderer::Impl::onLowMemory() {
if (painter) {
BackendScope { backend, backend.getScopeType() };
painter->cleanup();
}
renderStyle->onLowMemory();
observer->onInvalidate();
}
void Renderer::Impl::dumDebugLogs() {
renderStyle->dumpDebugLogs();
};
}
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