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#include "drape/glyph_generator.hpp"
#include <iterator>
using namespace std::placeholders;
namespace dp
{
GlyphGenerator::GlyphGenerator(uint32_t sdfScale)
: m_sdfScale(sdfScale)
{}
GlyphGenerator::~GlyphGenerator()
{
{
std::lock_guard<std::mutex> lock(m_mutex);
m_listeners.clear();
}
// Here we have to wait for active tasks completion,
// because they capture 'this' pointer.
m_activeTasks.FinishAll();
std::lock_guard<std::mutex> lock(m_mutex);
for (auto & data : m_queue)
data.DestroyGlyph();
}
bool GlyphGenerator::IsSuspended() const
{
std::lock_guard<std::mutex> lock(m_mutex);
return m_glyphsCounter == 0;
}
void GlyphGenerator::RegisterListener(ref_ptr<GlyphGenerator::Listener> listener)
{
std::lock_guard<std::mutex> lock(m_mutex);
m_listeners.insert(listener);
}
void GlyphGenerator::UnregisterListener(ref_ptr<GlyphGenerator::Listener> listener)
{
std::lock_guard<std::mutex> lock(m_mutex);
m_listeners.erase(listener);
}
void GlyphGenerator::GenerateGlyph(ref_ptr<Listener> listener, m2::RectU const & rect,
GlyphManager::Glyph & glyph)
{
GenerateGlyph(listener, GlyphGenerationData(rect, glyph));
}
void GlyphGenerator::GenerateGlyph(ref_ptr<Listener> listener, GlyphGenerationData && data)
{
GenerateGlyphs(listener, {std::move(data)});
}
void GlyphGenerator::GenerateGlyphs(ref_ptr<Listener> listener,
GlyphGenerationDataArray && generationData)
{
std::lock_guard<std::mutex> lock(m_mutex);
if (m_listeners.find(listener) == m_listeners.end())
{
for (auto & data : generationData)
data.DestroyGlyph();
return;
}
GlyphGenerationDataArray queue;
std::move(generationData.begin(), generationData.end(), std::back_inserter(m_queue));
std::swap(m_queue, queue);
m_glyphsCounter += queue.size();
// Generate glyphs on the separate thread.
auto generateTask = std::make_shared<GenerateGlyphTask>(std::move(queue));
auto result = DrapeRoutine::Run([this, listener, generateTask]() mutable
{
generateTask->Run(m_sdfScale);
OnTaskFinished(listener, generateTask);
});
if (result)
m_activeTasks.Add(generateTask, result);
else
generateTask->DestroyAllGlyphs();
}
void GlyphGenerator::OnTaskFinished(ref_ptr<Listener> listener,
std::shared_ptr<GenerateGlyphTask> const & task)
{
if (task->IsCancelled())
{
task->DestroyAllGlyphs();
return;
}
auto glyphs = task->StealGeneratedGlyphs();
std::lock_guard<std::mutex> lock(m_mutex);
ASSERT_GREATER_OR_EQUAL(m_glyphsCounter, glyphs.size(), ());
m_glyphsCounter -= glyphs.size();
if (m_listeners.find(listener) != m_listeners.end())
listener->OnCompleteGlyphGeneration(std::move(glyphs));
m_activeTasks.Remove(task);
}
void GlyphGenerator::GenerateGlyphTask::Run(uint32_t sdfScale)
{
m_generatedGlyphs.reserve(m_glyphs.size());
for (auto & data : m_glyphs)
{
if (m_isCancelled)
return;
auto const g = GlyphManager::GenerateGlyph(data.m_glyph, sdfScale);
data.DestroyGlyph();
m_generatedGlyphs.emplace_back(GlyphGenerator::GlyphGenerationData{data.m_rect, g});
}
}
void GlyphGenerator::GenerateGlyphTask::DestroyAllGlyphs()
{
for (auto & data : m_glyphs)
data.DestroyGlyph();
for (auto & data : m_generatedGlyphs)
data.DestroyGlyph();
}
} // namespace dp
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