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Reducing copies when writing png data.

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This commit is contained in:
tamasmeszaros 2019-03-18 18:02:50 +01:00
parent 24145cc14f
commit 04e03c840d
6 changed files with 88 additions and 12 deletions
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25
src/libslic3r/PrintExport.hpp
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@ -93,6 +93,10 @@ public:
void next_entry(const std::string& /*fname*/) {}
// binary entry
void binary_entry(const std::string& /*fname*/,
const std::uint8_t* buf, size_t len);
std::string get_name() { return ""; }
bool is_ok() { return false; }
@ -111,7 +115,7 @@ template<> class FilePrinter<FilePrinterFormat::SLA_PNGZIP>
{
struct Layer {
Raster first;
std::stringstream second;
RawBytes second;
Layer() {}
@ -226,15 +230,15 @@ public:
inline void finish_layer(unsigned lyr_id) {
assert(lyr_id < m_layers_rst.size());
m_layers_rst[lyr_id].first.save(m_layers_rst[lyr_id].second,
Raster::Compression::PNG);
m_layers_rst[lyr_id].second =
m_layers_rst[lyr_id].first.save(Raster::Compression::PNG);
m_layers_rst[lyr_id].first.reset();
}
inline void finish_layer() {
if(!m_layers_rst.empty()) {
m_layers_rst.back().first.save(m_layers_rst.back().second,
Raster::Compression::PNG);
m_layers_rst.back().second =
m_layers_rst.back().first.save(Raster::Compression::PNG);
m_layers_rst.back().first.reset();
}
}
@ -254,18 +258,15 @@ public:
for(unsigned i = 0; i < m_layers_rst.size() && writer.is_ok(); i++)
{
if(m_layers_rst[i].second.rdbuf()->in_avail() > 0) {
if(m_layers_rst[i].second.size > 0) {
char lyrnum[6];
std::sprintf(lyrnum, "%.5d", i);
auto zfilename = project + lyrnum + ".png";
writer.next_entry(zfilename);
if(!writer.is_ok()) break;
writer << m_layers_rst[i].second.str();
// writer << m_layers_rst[i].second.rdbuf();
// we can keep the date for later calls of this method
//m_layers_rst[i].second.str("");
writer.binary_entry(zfilename,
m_layers_rst[i].second.buffer.get(),
m_layers_rst[i].second.size);
}
}
} catch(std::exception& e) {