Merge pull request #7917 from ole00/sla_pwmx_export_rebase01

Added support for Anycubic Photon Mono X SLA printer and its native export format.

resources/profiles/Anycubic.ini

@@ -64,6 +64,13 @@ technology = FFF
 family = PREDATOR
 default_materials = Generic PLA @PREDATOR; Generic PETG @PREDATOR; Generic ABS @PREDATOR
 
+[printer_model:PHOTON MONO X]
+name = Photon Mono X
+variants = default
+technology = SLA
+family = PHOTON MONO
+default_materials = Generic Blue Resin MONO @0.05
+
 # All presets starting with asterisk, for example *common*, are intermediate and they will
 # not make it into the user interface.
 
@@ -1898,3 +1905,96 @@ default_print_profile = 0.24mm 0.8 nozzle DETAILED QUALITY @PREDATOR
 #########################################
 ########## end printer presets ##########
 #########################################
+
+#########################################
+########## SLA printer presets ##########
+#########################################
+
+
+[sla_print:*common print ANYCUBIC SLA*]
+compatible_printers_condition = family=="PHOTON MONO"
+layer_height = 0.05
+output_filename_format = [input_filename_base].pwmx
+pad_edge_radius = 0.5
+pad_enable = 0
+pad_max_merge_distance = 50
+pad_wall_height = 0
+pad_wall_thickness = 1
+pad_wall_slope = 45
+faded_layers = 8
+slice_closing_radius = 0.005
+support_base_diameter = 3
+support_base_height = 1
+support_critical_angle = 45
+support_density_at_45 = 250
+support_density_at_horizontal = 500
+support_head_front_diameter = 0.4
+support_head_penetration = 0.4
+support_head_width = 3
+support_max_bridge_length = 10
+support_minimal_z = 0
+support_object_elevation = 5
+support_pillar_diameter = 1
+support_pillar_connection_mode = zigzag
+support_pillar_widening_factor = 0
+supports_enable = 1
+support_small_pillar_diameter_percent = 60%
+
+[sla_print:0.05 ANYCUBIC SLA]
+inherits = *common print ANYCUBIC SLA*
+layer_height = 0.05
+
+
+########### Materials
+
+[sla_material:*common ANYCUBIC SLA*]
+compatible_printers_condition = family=="PHOTON MONO"
+compatible_prints_condition = layer_height == 0.05
+exposure_time = 7
+initial_exposure_time = 40
+initial_layer_height = 0.05
+material_correction = 1,1,1
+material_notes = LIFT_DISTANCE=8.0\nLIFT_SPEED=2.5\nRETRACT_SPEED=3.0\nBOTTOM_LIFT_SPEED=2.0\nBOTTOM_LIFT_DISTANCE=9.0\nDELAY_BEFORE_EXPOSURE=0.5
+
+[sla_material:*common 0.05 ANYCUBIC SLA*]
+inherits = *common ANYCUBIC SLA*
+
+[sla_material:Generic Blue Resin MONO @0.05]
+inherits = *common 0.05 ANYCUBIC SLA*
+exposure_time = 2.5
+initial_exposure_time = 40
+material_type = Tough
+material_vendor = Generic
+material_colour = #6080EC
+
+########## Printers
+
+[printer:Anycubic Photon Mono X]
+printer_technology = SLA
+printer_model = PHOTON MONO X
+printer_variant = default
+default_sla_material_profile = Generic Blue Resin MONO @0.05
+default_sla_print_profile = 0.05 ANYCUBIC SLA
+thumbnails = 224x168
+sla_archive_format = pwmx
+bed_shape = 1.48x1.02,193.48x1.02,193.48x121.02,1.48x121.02
+display_height = 120
+display_orientation = landscape
+display_mirror_x = 1
+display_mirror_y = 0
+display_pixels_x = 3840
+display_pixels_y = 2400
+display_width = 192
+max_print_height = 245
+elefant_foot_compensation = 0.2
+elefant_foot_min_width = 0.2
+min_exposure_time = 1
+max_exposure_time = 120
+min_initial_exposure_time = 1
+max_initial_exposure_time = 300
+printer_correction = 1,1,1
+gamma_correction = 1
+area_fill = 45
+printer_notes = Don't remove the following keywords! These keywords are used in the "compatible printer" condition of the print and filament profiles to link the particular print and filament profiles to this printer profile.'\nPRINTER_VENDOR_ANYCUBIC\nPRINTER_MODEL_PHOTONMONOX\n
+
+

src/libslic3r/CMakeLists.txt

@@ -98,6 +98,8 @@ set(SLIC3R_SOURCES
     Format/SL1.cpp
     Format/SL1_SVG.hpp
     Format/SL1_SVG.cpp
+    Format/pwmx.hpp
+    Format/pwmx.cpp
     GCode/ThumbnailData.cpp
     GCode/ThumbnailData.hpp
     GCode/Thumbnails.cpp

src/libslic3r/Format/pwmx.cpp

@@ -0,0 +1,509 @@
+#include "pwmx.hpp"
+#include "GCode/ThumbnailData.hpp"
+
+#include <sstream>
+#include <iostream>
+#include <fstream>
+
+
+#define TAG_INTRO "ANYCUBIC\0\0\0\0"
+#define TAG_HEADER "HEADER\0\0\0\0\0\0"
+#define TAG_PREVIEW "PREVIEW\0\0\0\0\0"
+#define TAG_LAYERS "LAYERDEF\0\0\0\0"
+
+#define CFG_LIFT_DISTANCE "LIFT_DISTANCE"
+#define CFG_LIFT_SPEED "LIFT_SPEED"
+#define CFG_RETRACT_SPEED "RETRACT_SPEED"
+#define CFG_DELAY_BEFORE_EXPOSURE "DELAY_BEFORE_EXPOSURE"
+#define CFG_BOTTOM_LIFT_SPEED "BOTTOM_LIFT_SPEED"
+#define CFG_BOTTOM_LIFT_DISTANCE "BOTTOM_LIFT_DISTANCE"
+
+#define PREV_W 224
+#define PREV_H 168
+#define PREV_DPI 42
+
+#define LAYER_SIZE_ESTIMATE (32 * 1024)
+
+
+namespace Slic3r {
+
+using ConfMap = std::map<std::string, std::string>;
+
+typedef struct pwmx_format_intro
+{
+    char          tag[12];
+    std::uint32_t version;  // value 1
+    std::uint32_t area_num; // unknown - usually 4
+    std::uint32_t header_data_offset;
+    std::float_t  intro24; // unknown - usually 0
+    std::uint32_t preview_data_offset;
+    std::float_t  intro32; // unknown
+    std::uint32_t layer_data_offset;
+    std::float_t  intro40; // unknown
+    std::uint32_t image_data_offset;
+} pwmx_format_intro;
+
+typedef struct pwmx_format_header
+{
+    char          tag[12];
+    std::uint32_t payload_size;
+    std::float_t  pixel_size_um;
+    std::float_t  layer_height_mm;
+    std::float_t  exposure_time_s;
+    std::float_t  delay_before_exposure_s;
+    std::float_t  bottom_exposure_time_s;
+    std::float_t  bottom_layer_count;
+    std::float_t  lift_distance_mm;
+    std::float_t  lift_speed_mms;
+    std::float_t  retract_speed_mms;
+    std::float_t  volume_ml;
+    std::uint32_t antialiasing;
+    std::uint32_t res_x;
+    std::uint32_t res_y;
+    std::float_t  weight_g;
+    std::float_t  price;
+    std::uint32_t price_currency;
+    std::uint32_t per_layer_override; // ? unknown meaning ?
+    std::uint32_t print_time_s;
+    std::uint32_t transition_layer_count;
+    std::uint32_t unknown; // ? usually 0 ?
+
+} pwmx_format_header;
+
+typedef struct pwmx_format_preview
+{
+    char          tag[12];
+    std::uint32_t payload_size;
+    std::uint32_t preview_w;
+    std::uint32_t preview_dpi;
+    std::uint32_t preview_h;
+    // raw image data in BGR565 format
+     std::uint8_t pixels[PREV_W * PREV_H * 2];
+} pwmx_format_preview;
+
+typedef struct pwmx_format_layers_header
+{
+    char          tag[12];
+    std::uint32_t payload_size;
+    std::uint32_t layer_count;
+} pwmx_format_layers_header;
+
+typedef struct pwmx_format_layer
+{
+    std::uint32_t image_offset;
+    std::uint32_t image_size;
+    std::float_t  lift_distance_mm;
+    std::float_t  lift_speed_mms;
+    std::float_t  exposure_time_s;
+    std::float_t  layer_height_mm;
+    std::float_t  layer44; // unkown - usually 0
+    std::float_t  layer48; // unkown - usually 0
+} pwmx_format_layer;
+
+typedef struct pwmx_format_misc
+{
+    std::float_t bottom_layer_height_mm;
+    std::float_t bottom_lift_distance_mm;
+    std::float_t bottom_lift_speed_mms;
+
+} pwmx_format_misc;
+
+class PwmxFormatConfigDef : public ConfigDef
+{
+public:
+    PwmxFormatConfigDef()
+    {
+        add(CFG_LIFT_DISTANCE, coFloat);
+        add(CFG_LIFT_SPEED, coFloat);
+        add(CFG_RETRACT_SPEED, coFloat);
+        add(CFG_DELAY_BEFORE_EXPOSURE, coFloat);
+        add(CFG_BOTTOM_LIFT_DISTANCE, coFloat);
+        add(CFG_BOTTOM_LIFT_SPEED, coFloat);
+    }
+};
+
+class PwmxFormatDynamicConfig : public DynamicConfig
+{
+public:
+    PwmxFormatDynamicConfig(){};
+    const ConfigDef *def() const override { return &config_def; }
+
+private:
+    PwmxFormatConfigDef config_def;
+};
+
+namespace {
+
+const char *get_cfg_value(const DynamicConfig &cfg,
+                          const std::string &  key,
+                          const std::string &  def = "0")
+{
+    std::string ret;
+
+    if (cfg.has(key)) {
+        auto opt = cfg.option(key);
+        if (opt) {
+            ret = opt->serialize();
+        } else {
+            return def.c_str();
+        }
+    } else {
+        return def.c_str();
+    }
+
+    return ret.c_str();
+}
+
+template<class T> void crop_value(T &val, T val_min, T val_max)
+{
+    if (val < val_min) {
+        val = val_min;
+    } else if (val > val_max) {
+        val = val_max;
+    }
+}
+
+void fill_preview(pwmx_format_preview &p,
+                  pwmx_format_misc   &m,
+                  ThumbnailsList &thumbnails)
+{
+
+    p.preview_w    = PREV_W;
+    p.preview_h    = PREV_H;
+    p.preview_dpi  = PREV_DPI;
+    p.payload_size = sizeof(p) - sizeof(p.tag) - sizeof(p.payload_size);
+                     
+    std::memset(p.pixels, 0 , sizeof(p.pixels));
+    if (!thumbnails.empty()) {
+        std::uint32_t dst_index;
+        std::uint32_t i = 0;
+        size_t len;
+        size_t pixel_x = 0;
+        auto t = thumbnails[0]; //use the first thumbnail
+        len = t.pixels.size();
+        //sanity check        
+        if (len != PREV_W * PREV_H * 4)  {
+            printf("incorrect thumbnail size. expected %ix%i\n", PREV_W, PREV_H);
+            return;
+        }
+        // rearange pixels: they seem to be stored from bottom to top.
+        dst_index = (PREV_W * (PREV_H - 1) * 2);
+        while (i < len) {
+            std::uint32_t pixel;
+            std::uint32_t r = t.pixels[i++];
+            std::uint32_t g = t.pixels[i++];
+            std::uint32_t b = t.pixels[i++];
+            i++; // Alpha
+            // convert to BGRA565
+            pixel = ((b >> 3) << 11) | ((g >>2) << 5) | (r >> 3);
+            p.pixels[dst_index++] = pixel & 0xFF;
+            p.pixels[dst_index++] = (pixel >> 8) & 0xFF;
+            pixel_x++;
+            if (pixel_x == PREV_W) {
+                pixel_x = 0;
+                dst_index -= (PREV_W * 4);
+            }
+        }
+    }
+}
+
+
+void fill_header(pwmx_format_header &h,
+                 pwmx_format_misc   &m,
+                 const SLAPrint     &print,
+                 std::uint32_t       layer_count)
+{
+    std::float_t bottle_weight_g;
+    std::float_t bottle_volume_ml;
+    std::float_t bottle_cost;
+    std::float_t material_density;
+    auto &      cfg    = print.full_print_config();
+    std::string mnotes = cfg.option("material_notes")->serialize();
+    // create a config parser from the material notes
+    Slic3r::PwmxFormatDynamicConfig mat_cfg;
+    SLAPrintStatistics              stats = print.print_statistics();
+
+    // sanitize the string config
+    boost::replace_all(mnotes, "\\n", "\n");
+    boost::replace_all(mnotes, "\\r", "\r");
+    mat_cfg.load_from_ini_string(mnotes,
+                                 ForwardCompatibilitySubstitutionRule::Enable);
+
+    h.layer_height_mm        = std::atof(get_cfg_value(cfg, "layer_height"));
+    m.bottom_layer_height_mm = std::atof(
+        get_cfg_value(cfg, "initial_layer_height"));
+    h.exposure_time_s        = std::atof(get_cfg_value(cfg, "exposure_time"));
+    h.bottom_exposure_time_s = std::atof(
+        get_cfg_value(cfg, "initial_exposure_time"));
+    h.bottom_layer_count = std::atof(get_cfg_value(cfg, "faded_layers"));
+    if (layer_count < h.bottom_layer_count) {
+        h.bottom_layer_count = layer_count;
+    }
+    h.res_x     = std::atol(get_cfg_value(cfg, "display_pixels_x"));
+    h.res_y     = std::atol(get_cfg_value(cfg, "display_pixels_y"));
+    bottle_weight_g = std::atof(get_cfg_value(cfg, "bottle_weight")) * 1000.0f;
+    bottle_volume_ml = std::atof(get_cfg_value(cfg, "bottle_volume"));
+    bottle_cost = std::atof(get_cfg_value(cfg, "bottle_cost"));
+    material_density = bottle_weight_g / bottle_volume_ml;
+
+    h.volume_ml = (stats.objects_used_material + stats.support_used_material) / 1000;
+    h.weight_g           = h.volume_ml * material_density;
+    h.price              = (h.volume_ml * bottle_cost) /  bottle_volume_ml;
+    h.price_currency     = '$';
+    h.antialiasing       = 1;
+    h.per_layer_override = 0;
+
+    // TODO - expose these variables to the UI rather than using material notes
+    h.delay_before_exposure_s = std::atof(
+        get_cfg_value(mat_cfg, CFG_DELAY_BEFORE_EXPOSURE, "0.5"));
+    crop_value(h.delay_before_exposure_s, 0.0f, 1000.0f);
+
+    h.lift_distance_mm = std::atof(
+        get_cfg_value(mat_cfg, CFG_LIFT_DISTANCE, "8.0"));
+    crop_value(h.lift_distance_mm, 0.0f, 100.0f);
+
+    if (mat_cfg.has(CFG_BOTTOM_LIFT_DISTANCE)) {
+        m.bottom_lift_distance_mm = std::atof(
+            get_cfg_value(mat_cfg, CFG_BOTTOM_LIFT_DISTANCE, "8.0"));
+        crop_value(h.lift_distance_mm, 0.0f, 100.0f);
+    } else {
+        m.bottom_lift_distance_mm = h.lift_distance_mm;
+    }
+
+
+    h.lift_speed_mms = std::atof(
+        get_cfg_value(mat_cfg, CFG_LIFT_SPEED, "2.0"));
+    crop_value(m.bottom_lift_speed_mms, 0.1f, 20.0f);
+
+    if (mat_cfg.has(CFG_BOTTOM_LIFT_SPEED)) {
+        m.bottom_lift_speed_mms = std::atof(
+            get_cfg_value(mat_cfg, CFG_BOTTOM_LIFT_SPEED, "2.0"));
+        crop_value(m.bottom_lift_speed_mms, 0.1f, 20.0f);
+    } else {
+        m.bottom_lift_speed_mms = h.lift_speed_mms;
+    }
+
+    h.retract_speed_mms = std::atof(
+        get_cfg_value(mat_cfg, CFG_RETRACT_SPEED, "3.0"));
+    crop_value(h.lift_speed_mms, 0.1f, 20.0f);
+
+    h.print_time_s = (h.bottom_layer_count * h.bottom_exposure_time_s) +
+                     ((layer_count - h.bottom_layer_count) *
+                      h.exposure_time_s) +
+                     (layer_count * h.lift_distance_mm / h.retract_speed_mms) +
+                     (layer_count * h.lift_distance_mm / h.lift_speed_mms) +
+                     (layer_count * h.delay_before_exposure_s);
+
+
+    h.payload_size  = sizeof(h) - sizeof(h.tag) - sizeof(h.payload_size);
+    h.pixel_size_um = 50;
+}
+
+} // namespace
+
+std::unique_ptr<sla::RasterBase> PwmxArchive::create_raster() const
+{
+    sla::Resolution     res;
+    sla::PixelDim       pxdim;
+    std::array<bool, 2> mirror;
+
+    double w  = m_cfg.display_width.getFloat();
+    double h  = m_cfg.display_height.getFloat();
+    auto   pw = size_t(m_cfg.display_pixels_x.getInt());
+    auto   ph = size_t(m_cfg.display_pixels_y.getInt());
+
+    mirror[X] = m_cfg.display_mirror_x.getBool();
+    mirror[Y] = m_cfg.display_mirror_y.getBool();
+
+    auto                         ro = m_cfg.display_orientation.getInt();
+    sla::RasterBase::Orientation orientation =
+        ro == sla::RasterBase::roPortrait ? sla::RasterBase::roPortrait :
+                                            sla::RasterBase::roLandscape;
+
+    if (orientation == sla::RasterBase::roPortrait) {
+        std::swap(w, h);
+        std::swap(pw, ph);
+    }
+
+    res   = sla::Resolution{pw, ph};
+    pxdim = sla::PixelDim{w / pw, h / ph};
+    sla::RasterBase::Trafo tr{orientation, mirror};
+
+    double gamma = m_cfg.gamma_correction.getFloat();
+
+    return sla::create_raster_grayscale_aa(res, pxdim, gamma, tr);
+}
+
+sla::RasterEncoder PwmxArchive::get_encoder() const
+{
+    return sla::PWXRasterEncoder{};
+}
+
+// Endian safe write of little endian 32bit ints
+static void pwmx_write_int32(std::ofstream &out, std::uint32_t val)
+{
+    const char i1 = (val & 0xFF);
+    const char i2 = (val >> 8) & 0xFF;
+    const char i3 = (val >> 16) & 0xFF;
+    const char i4 = (val >> 24) & 0xFF;
+
+    out.write((const char *) &i1, 1);
+    out.write((const char *) &i2, 1);
+    out.write((const char *) &i3, 1);
+    out.write((const char *) &i4, 1);
+}
+static void pwmx_write_float(std::ofstream &out, std::float_t val)
+{
+    std::uint32_t *f = (std::uint32_t *) &val;
+    pwmx_write_int32(out, *f);
+}
+
+static void pwmx_write_intro(std::ofstream &out, pwmx_format_intro &i)
+{
+    out.write(TAG_INTRO, sizeof(i.tag));
+    pwmx_write_int32(out, i.version);
+    pwmx_write_int32(out, i.area_num);
+    pwmx_write_int32(out, i.header_data_offset);
+    pwmx_write_int32(out, i.intro24);
+    pwmx_write_int32(out, i.preview_data_offset);
+    pwmx_write_int32(out, i.intro32);
+    pwmx_write_int32(out, i.layer_data_offset);
+    pwmx_write_int32(out, i.intro40);
+    pwmx_write_int32(out, i.image_data_offset);
+}
+
+static void pwmx_write_header(std::ofstream &out, pwmx_format_header &h)
+{
+    out.write(TAG_HEADER, sizeof(h.tag));
+    pwmx_write_int32(out, h.payload_size);
+    pwmx_write_float(out, h.pixel_size_um);
+    pwmx_write_float(out, h.layer_height_mm);
+    pwmx_write_float(out, h.exposure_time_s);
+    pwmx_write_float(out, h.delay_before_exposure_s);
+    pwmx_write_float(out, h.bottom_exposure_time_s);
+    pwmx_write_float(out, h.bottom_layer_count);
+    pwmx_write_float(out, h.lift_distance_mm);
+    pwmx_write_float(out, h.lift_speed_mms);
+    pwmx_write_float(out, h.retract_speed_mms);
+    pwmx_write_float(out, h.volume_ml);
+    pwmx_write_int32(out, h.antialiasing);
+    pwmx_write_int32(out, h.res_x);
+    pwmx_write_int32(out, h.res_y);
+    pwmx_write_float(out, h.weight_g);
+    pwmx_write_float(out, h.price);
+    pwmx_write_int32(out, h.price_currency);
+    pwmx_write_int32(out, h.per_layer_override);
+    pwmx_write_int32(out, h.print_time_s);
+    pwmx_write_int32(out, h.transition_layer_count);
+    pwmx_write_int32(out, h.unknown);
+}
+
+static void pwmx_write_preview(std::ofstream &out, pwmx_format_preview &p)
+{
+    out.write(TAG_PREVIEW, sizeof(p.tag));
+    pwmx_write_int32(out, p.payload_size);
+    pwmx_write_int32(out, p.preview_w);
+    pwmx_write_int32(out, p.preview_dpi);
+    pwmx_write_int32(out, p.preview_h);
+    out.write((const char*) p.pixels, sizeof(p.pixels));
+}
+
+static void pwmx_write_layers_header(std::ofstream &out, pwmx_format_layers_header &h)
+{
+    out.write(TAG_LAYERS, sizeof(h.tag));
+    pwmx_write_int32(out, h.payload_size);
+    pwmx_write_int32(out, h.layer_count);
+}
+
+static void pwmx_write_layer(std::ofstream &out, pwmx_format_layer &l)
+{
+    pwmx_write_int32(out, l.image_offset);
+    pwmx_write_int32(out, l.image_size);
+    pwmx_write_float(out, l.lift_distance_mm);
+    pwmx_write_float(out, l.lift_speed_mms);
+    pwmx_write_float(out, l.exposure_time_s);
+    pwmx_write_float(out, l.layer_height_mm);
+    pwmx_write_float(out, l.layer44);
+    pwmx_write_float(out, l.layer48);
+}
+
+void PwmxArchive::export_print(const std::string  fname,
+                               const SLAPrint &   print,
+                               ThumbnailsList &   thumbnails,
+                               const std::string &prjname)
+{
+    std::uint32_t layer_count = m_layers.size();
+
+    pwmx_format_intro         intro = {0};
+    pwmx_format_header        header = {0};
+    pwmx_format_preview       preview = {0};
+    pwmx_format_layers_header layers_header = {0};
+    pwmx_format_misc          misc = {0};
+    std::vector<uint8_t>      layer_images;
+    std::uint32_t             image_offset;
+
+    intro.version             = 1;
+    intro.area_num            = 4;
+    intro.header_data_offset  = sizeof(intro);
+    intro.preview_data_offset = sizeof(intro) + sizeof(header);
+    intro.layer_data_offset   = intro.preview_data_offset + sizeof(preview);
+    intro.image_data_offset = intro.layer_data_offset +
+                              sizeof(layers_header) +
+                              (sizeof(pwmx_format_layer) * layer_count);
+
+    fill_header(header, misc, print, layer_count);
+    fill_preview(preview, misc, thumbnails);
+
+    try {
+        // open the file and write the contents
+        std::ofstream out;
+        out.open(fname, std::ios::binary | std::ios::out | std::ios::trunc);
+        pwmx_write_intro(out, intro);
+        pwmx_write_header(out, header);
+        pwmx_write_preview(out, preview);
+
+        layers_header.payload_size = intro.image_data_offset - intro.layer_data_offset -
+                        sizeof(layers_header.tag)  - sizeof(layers_header.payload_size);
+        layers_header.layer_count = layer_count;
+        pwmx_write_layers_header(out, layers_header);
+
+        //layers
+        layer_images.reserve(layer_count * LAYER_SIZE_ESTIMATE);
+        image_offset = intro.image_data_offset;
+        size_t i = 0;
+        for (const sla::EncodedRaster &rst : m_layers) {
+            pwmx_format_layer l;
+            std::memset(&l, 0, sizeof(l));
+            l.image_offset = image_offset;
+            l.image_size = rst.size();
+            if (i < header.bottom_layer_count) {
+                l.exposure_time_s = header.bottom_exposure_time_s;
+                l.layer_height_mm = misc.bottom_layer_height_mm;
+                l.lift_distance_mm = misc.bottom_lift_distance_mm;
+                l.lift_speed_mms = misc.bottom_lift_speed_mms;
+            } else {
+                l.exposure_time_s = header.exposure_time_s;
+                l.layer_height_mm = header.layer_height_mm;
+                l.lift_distance_mm = header.lift_distance_mm;
+                l.lift_speed_mms = header.lift_speed_mms;
+            }
+            image_offset += l.image_size;
+            pwmx_write_layer(out, l);
+            // add the rle encoded layer image into the buffer
+            const char* img_start = reinterpret_cast<const char*>(rst.data());
+            const char* img_end = img_start + rst.size();
+            std::copy(img_start, img_end, std::back_inserter(layer_images));
+            i++;
+        }
+        const char* img_buffer = reinterpret_cast<const char*>(layer_images.data());
+        out.write(img_buffer, layer_images.size());
+        out.close();
+    } catch(std::exception& e) {
+        BOOST_LOG_TRIVIAL(error) << e.what();
+        // Rethrow the exception
+        throw;
+    }
+
+}
+
+} // namespace Slic3r

src/libslic3r/Format/pwmx.hpp

@@ -0,0 +1,36 @@
+#ifndef _SLIC3R_FORMAT_PWMX_HPP_
+#define _SLIC3R_FORMAT_PWMX_HPP_
+
+#include <string>
+
+#include "libslic3r/SLAPrint.hpp"
+
+namespace Slic3r {
+
+class PwmxArchive: public SLAArchive {
+    SLAPrinterConfig m_cfg;
+    
+protected:
+    std::unique_ptr<sla::RasterBase> create_raster() const override;
+    sla::RasterEncoder get_encoder() const override;
+
+    SLAPrinterConfig & cfg() { return m_cfg; }
+    const SLAPrinterConfig & cfg() const { return m_cfg; }
+
+public:
+    
+    PwmxArchive() = default;
+    explicit PwmxArchive(const SLAPrinterConfig &cfg): m_cfg(cfg) {}
+    explicit PwmxArchive(SLAPrinterConfig &&cfg): m_cfg(std::move(cfg)) {}
+    
+    void export_print(const std::string fname, 
+                      const SLAPrint &print,
+                      ThumbnailsList    &thumbnails,
+                      const std::string &projectname = "") override;
+    bool uses_zipper_export() override {return false;}
+};
+
+
+} // namespace Slic3r::sla
+
+#endif // _SLIC3R_FORMAT_PWMX_HPP_

src/libslic3r/SLA/RasterBase.cpp

@@ -16,6 +16,54 @@ const RasterBase::TMirroring RasterBase::MirrorX  = {true, false};
 const RasterBase::TMirroring RasterBase::MirrorY  = {false, true};
 const RasterBase::TMirroring RasterBase::MirrorXY = {true, true};
 
+
+
+static void pwx_get_pixel_span(const std::uint8_t* ptr, const std::uint8_t* end,
+                         std::uint8_t& pixel, size_t& span_len)
+{
+    size_t max_len;
+
+    span_len = 0;
+    pixel = (*ptr) & 0xF0;
+    // the maximum length of the span depends on the pixel color
+    max_len = (pixel == 0 || pixel == 0xF0) ? 0xFFF : 0xF;
+    while (((*ptr) & 0xF0) == pixel && ptr < end && span_len < max_len) {
+        span_len++;
+        ptr++;
+    }
+}
+
+EncodedRaster PWXRasterEncoder::operator()(const void *ptr, size_t w, size_t h,
+                                           size_t      num_components)
+{
+    std::vector<uint8_t> dst;
+    size_t span_len;
+    std::uint8_t pixel;    
+    auto size = w * h * num_components;   
+    dst.reserve(size);
+
+    const std::uint8_t* src = reinterpret_cast<const std::uint8_t*>(ptr);
+    const std::uint8_t* src_end = src + size;
+    while (src < src_end) {
+        pwx_get_pixel_span(src, src_end, pixel, span_len);
+        src += span_len;
+        // fully transparent of fully opaque pixel
+        if (pixel == 0 || pixel == 0xF0) {
+            pixel = pixel  | (span_len >> 8);
+            std::copy(&pixel, (&pixel) + 1, std::back_inserter(dst));
+            pixel = span_len & 0xFF;
+            std::copy(&pixel, (&pixel) + 1, std::back_inserter(dst));
+        } 
+        // antialiased pixel
+        else {
+            pixel = pixel | span_len;
+            std::copy(&pixel, (&pixel) + 1, std::back_inserter(dst));
+        }
+    }
+  
+    return EncodedRaster(std::move(dst), "pwx");
+}
+
 EncodedRaster PNGRasterEncoder::operator()(const void *ptr, size_t w, size_t h,
                                            size_t      num_components)
 {

src/libslic3r/SLA/RasterBase.hpp

@@ -97,6 +97,10 @@ public:
     virtual EncodedRaster encode(RasterEncoder encoder) const = 0;
 };
 
+struct PWXRasterEncoder {
+    EncodedRaster operator()(const void *ptr, size_t w, size_t h, size_t num_components);
+};
+
 struct PNGRasterEncoder {
     EncodedRaster operator()(const void *ptr, size_t w, size_t h, size_t num_components);
 };

src/libslic3r/SLAPrint.cpp

@@ -3,6 +3,7 @@
 
 #include "Format/SL1.hpp"
 #include "Format/SL1_SVG.hpp"
+#include "Format/pwmx.hpp"
 
 #include "ClipperUtils.hpp"
 #include "Geometry.hpp"
@@ -16,6 +17,8 @@
 #include <boost/filesystem/path.hpp>
 #include <boost/log/trivial.hpp>
 
+#include <miniz.h>
+
 // #define SLAPRINT_DO_BENCHMARK
 
 #ifdef SLAPRINT_DO_BENCHMARK
@@ -249,6 +252,9 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model, DynamicPrintConfig con
             m_archiver = std::make_unique<SL1Archive>(m_printer_config);
         else if (m_printer_config.sla_archive_format.value == "SL2")
             m_archiver = std::make_unique<SL1_SVGArchive>(m_printer_config);
+        else if (m_printer_config.sla_archive_format.value == "pwmx") {
+            m_archiver = std::make_unique<PwmxArchive>(m_printer_config);
+        }
     }
 
     struct ModelObjectStatus {
@@ -1265,4 +1271,16 @@ void SLAPrint::StatusReporter::operator()(SLAPrint &         p,
     p.set_status(int(std::round(st)), msg, flags);
 }
 
+
+void SLAPrint::write_thumbnail(Zipper& zipper, const ThumbnailData& data)
+{
+    size_t png_size = 0;
+    void* png_data = tdefl_write_image_to_png_file_in_memory_ex((const void*)data.pixels.data(), data.width, data.height, 4, &png_size, MZ_DEFAULT_LEVEL, 1);
+    if (png_data != nullptr)
+    {
+        zipper.add_entry("thumbnail/thumbnail" + std::to_string(data.width) + "x" + std::to_string(data.height) + ".png", (const std::uint8_t*)png_data, png_size);
+        mz_free(png_data);
+    }
+}
+
 } // namespace Slic3r

src/libslic3r/SLAPrint.hpp

@@ -9,6 +9,7 @@
 #include "Point.hpp"
 #include "MTUtils.hpp"
 #include "Zipper.hpp"
+#include "GCode/ThumbnailData.hpp"
 
 #include "libslic3r/Execution/ExecutionTBB.hpp"
 
@@ -422,12 +423,16 @@ public:
     }
 
     // Export the print into an archive using the provided zipper.
-    // TODO: Use an archive writer interface instead of Zipper.
-    // This is quite limiting as the Zipper is a complete class, not an interface.
-    // The output can only be a zip archive.
     virtual void export_print(Zipper            &zipper,
                               const SLAPrint    &print,
-                              const std::string &projectname = "") = 0;
+                              const std::string &projectname = "") {};
+    // Export the print into an archive using the provided filename.
+    virtual void export_print(const std::string fname,
+                              const SLAPrint    &print,
+                              ThumbnailsList    &thumbnails,
+                              const std::string &projectname = "") {};
+    // By default the exporters use zipper export. Return false to use file export.
+    virtual bool uses_zipper_export() { return true; }
 };
 
 /**
@@ -534,15 +539,26 @@ public:
     // TODO: use this structure for the preview in the future.
     const std::vector<PrintLayer>& print_layers() const { return m_printer_input; }
    
-    void export_print(Zipper &zipper, const std::string &projectname = "")
+    void write_thumbnail(Zipper& zipper, const ThumbnailData& data);
-    {
-        m_archiver->export_print(zipper, *this, projectname);
-    }
 
     void export_print(const std::string &fname, const std::string &projectname = "")
     {
-        Zipper zipper(fname);
+        Slic3r::ThumbnailsList thumbnails; //empty thumbnail list
-        export_print(zipper, projectname);
+        export_print(fname, thumbnails, projectname);
+    }
+
+    void export_print(const std::string &fname, Slic3r::ThumbnailsList &thumbnails, const std::string &projectname = "")
+    {
+        if (m_archiver->uses_zipper_export()) {
+            Zipper zipper(fname);
+            m_archiver->export_print(zipper, *this, projectname);
+            for (const ThumbnailData& data : thumbnails)
+                if (data.is_valid())
+                    write_thumbnail(zipper, data);
+            zipper.finalize();
+        } else {
+            m_archiver->export_print(fname, *this, thumbnails, projectname);
+        }
     }
     
 private:

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -165,17 +165,6 @@ void BackgroundSlicingProcess::process_fff()
 	}
 }
 
-static void write_thumbnail(Zipper& zipper, const ThumbnailData& data)
-{
-    size_t png_size = 0;
-    void* png_data = tdefl_write_image_to_png_file_in_memory_ex((const void*)data.pixels.data(), data.width, data.height, 4, &png_size, MZ_DEFAULT_LEVEL, 1);
-    if (png_data != nullptr)
-    {
-        zipper.add_entry("thumbnail/thumbnail" + std::to_string(data.width) + "x" + std::to_string(data.height) + ".png", (const std::uint8_t*)png_data, png_size);
-        mz_free(png_data);
-    }
-}
-
 void BackgroundSlicingProcess::process_sla()
 {
     assert(m_print == m_sla_print);
@@ -189,12 +178,7 @@ void BackgroundSlicingProcess::process_sla()
             ThumbnailsList thumbnails = this->render_thumbnails(
             	ThumbnailsParams{current_print()->full_print_config().option<ConfigOptionPoints>("thumbnails")->values, true, true, true, true});
 
-            Zipper zipper(export_path);
+            m_sla_print->export_print(export_path, thumbnails);
-            m_sla_print->export_print(zipper);
-			for (const ThumbnailData& data : thumbnails)
-                if (data.is_valid())
-                    write_thumbnail(zipper, data);
-            zipper.finalize();
 
             m_print->set_status(100, (boost::format(_utf8(L("Masked SLA file exported to %1%"))) % export_path).str());
         } else if (! m_upload_job.empty()) {
@@ -739,13 +723,7 @@ void BackgroundSlicingProcess::prepare_upload()
         
         ThumbnailsList thumbnails = this->render_thumbnails(
         	ThumbnailsParams{current_print()->full_print_config().option<ConfigOptionPoints>("thumbnails")->values, true, true, true, true});
-																												 // true, false, true, true); // renders also supports and pad
+        m_sla_print->export_print(source_path.string(),thumbnails, m_upload_job.upload_data.upload_path.string());
-        Zipper zipper{source_path.string()};
-        m_sla_print->export_print(zipper, m_upload_job.upload_data.upload_path.string());
-        for (const ThumbnailData& data : thumbnails)
-	        if (data.is_valid())
-	            write_thumbnail(zipper, data);
-        zipper.finalize();
     }
 
     m_print->set_status(100, (boost::format(_utf8(L("Scheduling upload to `%1%`. See Window -> Print Host Upload Queue"))) % m_upload_job.printhost->get_host()).str());

src/slic3r/GUI/GUI_App.cpp

@@ -496,7 +496,7 @@ static const FileWildcards file_wildcards_by_type[FT_SIZE] = {
 
     /* FT_TEX */     { "Texture"sv,         { ".png"sv, ".svg"sv } },
 
-    /* FT_SL1 */     { "Masked SLA files"sv, { ".sl1"sv, ".sl1s"sv } },
+    /* FT_SL1 */     { "Masked SLA files"sv, { ".sl1"sv, ".sl1s"sv, ".pwmx"sv } },
 };
 
 // This function produces a Win32 file dialog file template mask to be consumed by wxWidgets on all platforms.