PrusaSlicer-NonPlainar/src/libslic3r/GCode/Thumbnails.hpp
2022-02-03 08:36:24 +01:00

60 lines
2.4 KiB
C++

#ifndef slic3r_GCodeThumbnails_hpp_
#define slic3r_GCodeThumbnails_hpp_
#include "../Point.hpp"
#include "../PrintConfig.hpp"
#include "ThumbnailData.hpp"
#include <vector>
#include <memory>
#include <string_view>
#include <boost/beast/core/detail/base64.hpp>
namespace Slic3r::GCodeThumbnails {
struct CompressedImageBuffer
{
void *data { nullptr };
size_t size { 0 };
virtual ~CompressedImageBuffer() {}
virtual std::string_view tag() const = 0;
};
std::unique_ptr<CompressedImageBuffer> compress_thumbnail(const ThumbnailData &data, GCodeThumbnailsFormat format);
template<typename WriteToOutput, typename ThrowIfCanceledCallback>
inline void export_thumbnails_to_file(ThumbnailsGeneratorCallback &thumbnail_cb, const std::vector<Vec2d> &sizes, GCodeThumbnailsFormat format, WriteToOutput output, ThrowIfCanceledCallback throw_if_canceled)
{
// Write thumbnails using base64 encoding
if (thumbnail_cb != nullptr) {
static constexpr const size_t max_row_length = 78;
ThumbnailsList thumbnails = thumbnail_cb(ThumbnailsParams{ sizes, true, true, true, true });
for (const ThumbnailData& data : thumbnails)
if (data.is_valid()) {
auto compressed = compress_thumbnail(data, format);
if (compressed->data && compressed->size) {
std::string encoded;
encoded.resize(boost::beast::detail::base64::encoded_size(compressed->size));
encoded.resize(boost::beast::detail::base64::encode((void*)encoded.data(), (const void*)compressed->data, compressed->size));
output((boost::format("\n;\n; %s begin %dx%d %d\n") % compressed->tag() % data.width % data.height % encoded.size()).str().c_str());
while (encoded.size() > max_row_length) {
output((boost::format("; %s\n") % encoded.substr(0, max_row_length)).str().c_str());
encoded = encoded.substr(max_row_length);
}
if (encoded.size() > 0)
output((boost::format("; %s\n") % encoded).str().c_str());
output((boost::format("; %s end\n;\n") % compressed->tag()).str().c_str());
}
throw_if_canceled();
}
}
}
} // namespace Slic3r::GCodeThumbnails
#endif // slic3r_GCodeThumbnails_hpp_