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Merging with master for having minz png compression.

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Much greater performance boost from better compression algorithm than that from the merged polygons.
This commit is contained in:
tamasmeszaros 2019-03-29 15:21:46 +01:00
commit 725f115756
344 changed files with 786 additions and 116524 deletions
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79
src/libslic3r/Rasterizer/Rasterizer.cpp
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@ -2,8 +2,6 @@
#include <ExPolygon.hpp>
#include <libnest2d/backends/clipper/clipper_polygon.hpp>
#include <cstdint>
// For rasterizing
#include <agg/agg_basics.h>
#include <agg/agg_rendering_buffer.h>
@ -16,8 +14,8 @@
#include <agg/agg_rasterizer_scanline_aa.h>
#include <agg/agg_path_storage.h>
// For png compression
#include <png/writer.hpp>
// Experimental minz image write:
#include <miniz/miniz_tdef.h>
namespace Slic3r {
@ -201,29 +199,23 @@ void Raster::draw(const ClipperLib::Polygon &poly)
void Raster::save(std::ostream& stream, Compression comp)
{
assert(m_impl);
if(!stream.good()) return;
switch(comp) {
case Compression::PNG: {
png::writer<std::ostream> wr(stream);
wr.set_bit_depth(8);
wr.set_color_type(png::color_type_gray);
wr.set_width(resolution().width_px);
wr.set_height(resolution().height_px);
wr.set_compression_type(png::compression_type_default);
wr.write_info();
auto& b = m_impl->buffer();
auto ptr = reinterpret_cast<png::byte*>( b.data() );
unsigned stride =
sizeof(Impl::TBuffer::value_type) * resolution().width_px;
size_t out_len = 0;
void * rawdata = tdefl_write_image_to_png_file_in_memory(
b.data(),
int(resolution().width_px),
int(resolution().height_px), 1, &out_len);
for(unsigned r = 0; r < resolution().height_px; r++, ptr+=stride) {
wr.write_row(ptr);
}
if(rawdata == nullptr) break;
wr.write_end_info();
stream.write(static_cast<const char*>(rawdata),
std::streamsize(out_len));
MZ_FREE(rawdata);
break;
}
@ -240,4 +232,47 @@ void Raster::save(std::ostream& stream, Compression comp)
}
}
RawBytes Raster::save(Raster::Compression comp)
{
assert(m_impl);
std::uint8_t *ptr = nullptr; size_t s = 0;
switch(comp) {
case Compression::PNG: {
void *rawdata = tdefl_write_image_to_png_file_in_memory(
m_impl->buffer().data(),
int(resolution().width_px),
int(resolution().height_px), 1, &s);
if(rawdata == nullptr) break;
ptr = static_cast<std::uint8_t*>(rawdata);
break;
}
case Compression::RAW: {
auto header = std::string("P5 ") +
std::to_string(m_impl->resolution().width_px) + " " +
std::to_string(m_impl->resolution().height_px) + " " + "255 ";
auto sz = m_impl->buffer().size()*sizeof(Impl::TBuffer::value_type);
s = sz + header.size();
ptr = static_cast<std::uint8_t*>(MZ_MALLOC(s));
auto buff = reinterpret_cast<std::uint8_t*>(m_impl->buffer().data());
std::copy(buff, buff+sz, ptr + header.size());
}
}
return {ptr, s};
}
void RawBytes::MinzDeleter::operator()(uint8_t *rawptr)
{
MZ_FREE(rawptr);
}
}