Porting of Pressure Equalizer feature from Prusa Slicer 2.6.x (#2161)

* Overhang perimeter handling

Updated code to handle overhang perimeters as an overhang and not as a bridge.

* Preparing to add curled extrusions identification

* Porting curling calculations from Prusa Slier 2.6.1

* Prototype 1 - slowdown extended to detect curled edges and further reduce speed

First prototype of the code submitted.

* Working prototype - 2

Code is now finally working - external perimeters are slowed down as needed when there is likelyhood of curling up.

ToDo:
1. Reslicing the model causes the algorithm not to run - need to find where this fails to trigger the call for this.
2. Slowdown of internal perimeters not working yet.

* Updated to use overhang wall speed instead of bridging speed for this algorithm

* Fixed bug in speed calculation and tweaked parameters for high speed printer

Fixed bug in speed calculation and tweaked parameters for high speed printer

* Attempting to fix "set started" not being set

* Parameter tweak after print tests

* Fixed estimation not running when model is re-sliced.

* Removing debug printf statements and fixed threading flag.

* Fixed threading

* Parameter tweaks following print tests

* Made this as an option in the GUI

* Reintroduced handling of bridges as per original design

* UI line toggling when option makes sense to be visible.

* Fixed bug in field visibility & made it default to off

* Code optimisation

* Initial commit of code from Prusa Slicer 2.6.1

* Ported ExtrusionRole from Prusa Slicer 2.6.1

* fix compile errors

* Update GCode.hpp

* code changes to invoke pressure equalizer

* attempting to trigger pressure equalizer

(Not compiling)

* Update Fill.cpp

* Update Fill.cpp

* Pressure equaliser layer result update

* Further commits

* Merged PR https://github.com/prusa3d/PrusaSlicer/pull/9622

* First complete working version

* Update PressureEqualizer.cpp

* Implemented parameter in GUI

* Toggle fields according to compatibility

* Updated UI toggles between extrusion rate slope and arc fitting.

* Updated tooltip

* Introduced parameter smoothing segment length

This parameter influences the number of division a line will undergo in response to the requirement to adhere to the extrusion rate flow adjustment.

* Internal parameter and tool tip tweaking

* Parameter and tool tip tweaking

* Updated parameters and tooltip following testing.

* Sync PressureEq with latest PrusaSlicer

* Revert "Sync PressureEq with latest PrusaSlicer"

This reverts commit 131fb94c6b.

---------

Co-authored-by: MGunlogson <MGunlogson@users.noreply.github.com>
Co-authored-by: Vojtech Bubnik <bubnikv@gmail.com>

src/libslic3r/ExtrusionRole.hpp

@@ -0,0 +1,83 @@
+///|/ Copyright (c) 2023 Robert Schiele @schiele
+///|/ Copyright (c) Prusa Research 2023 Vojtěch Bubník @bubnikv
+///|/
+///|/ PrusaSlicer is released under the terms of the AGPLv3 or higher
+///|/
+#ifndef slic3r_ExtrusionRole_hpp_
+#define slic3r_ExtrusionRole_hpp_
+
+#include "enum_bitmask.hpp"
+#include "ExtrusionEntity.hpp"
+
+#include <string>
+#include <string_view>
+#include <cstdint>
+
+namespace Slic3r {
+
+enum class ExtrusionRoleModifier : uint16_t {
+// 1) Extrusion types
+    // Perimeter (external, inner, ...)
+    Perimeter,
+    // Infill (top / bottom / solid inner / sparse inner / bridging inner ...)
+    Infill,
+    // Variable width extrusion
+    Thin,
+    // Support material extrusion
+    Support,
+    Skirt,
+    Wipe,
+// 2) Extrusion modifiers
+    External,
+    Solid,
+    Ironing,
+    Bridge,
+// 3) Special types
+    // Indicator that the extrusion role was mixed from multiple differing extrusion roles,
+    // for example from Support and SupportInterface.
+    Mixed,
+    // Stopper, there should be maximum 16 modifiers defined for uint16_t bit mask.
+    Count
+};
+// There should be maximum 16 modifiers defined for uint16_t bit mask.
+static_assert(int(ExtrusionRoleModifier::Count) <= 16, "ExtrusionRoleModifier: there must be maximum 16 modifiers defined to fit a 16 bit bitmask");
+
+using ExtrusionRoleModifiers = enum_bitmask<ExtrusionRoleModifier>;
+ENABLE_ENUM_BITMASK_OPERATORS(ExtrusionRoleModifier);
+
+
+
+// Be careful when editing this list as many parts of the code depend
+// on the values of these ordinars, for example
+// GCodeViewer::Extrusion_Role_Colors
+enum class GCodeExtrusionRole : uint8_t {
+    None,
+    Perimeter,
+    ExternalPerimeter,
+    OverhangPerimeter,
+    InternalInfill,
+    SolidInfill,
+    TopSolidInfill,
+    Ironing,
+    BridgeInfill,
+    GapFill,
+    Skirt,
+    SupportMaterial,
+    SupportMaterialInterface,
+    WipeTower,
+    // Custom (user defined) G-code block, for example start / end G-code.
+    Custom,
+    // Stopper to count number of enums.
+    Count
+};
+
+// Convert a rich bitmask based ExtrusionRole to a less expressive ordinal GCodeExtrusionRole.
+// GCodeExtrusionRole is to be serialized into G-code and deserialized by G-code viewer,
+GCodeExtrusionRole extrusion_role_to_gcode_extrusion_role(ExtrusionRole role);
+
+std::string gcode_extrusion_role_to_string(GCodeExtrusionRole role);
+GCodeExtrusionRole string_to_gcode_extrusion_role(const std::string_view role);
+
+}
+
+#endif // slic3r_ExtrusionRole_hpp_