WIP: Restoring of the command line only builds (no GUI support).

CMakeLists.txt

@@ -49,6 +49,10 @@ foreach (_cache_var ${_cache_vars})
     endif ()
 endforeach()
 
+if (SLIC3R_GUI)
+    add_definitions(-DSLIC3R_GUI)
+endif ()
+
 if (MSVC)
     if (SLIC3R_MSVC_COMPILE_PARALLEL)
 	   add_compile_options(/MP)

src/slic3r.cpp

@@ -6,10 +6,12 @@
     #define NOMINMAX
     #include <Windows.h>
     #include <wchar.h>
+    #ifdef SLIC3R_GUI
         // Let the NVIDIA and AMD know we want to use their graphics card
         // on a dual graphics card system.
         __declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
         __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+    #endif /* SLIC3R_GUI */
 #endif /* WIN32 */
 
 #include <cstdio>
@@ -448,7 +450,7 @@ int CLI::run(int argc, char **argv)
     }
     
 	if (start_gui) {
-#if 1
+#ifdef SLIC3R_GUI
 // #ifdef USE_WX
 		GUI::GUI_App *gui = new GUI::GUI_App();
 //		gui->autosave = m_config.opt_string("autosave");
@@ -477,12 +479,12 @@ int CLI::run(int argc, char **argv)
 				gui->mainframe->load_config(m_extra_config);
 		});
 		return wxEntry(argc, argv);
-#else
+#else /* SLIC3R_GUI */
 		// No GUI support. Just print out a help.
 		this->print_help(false);
 		// If started without a parameter, consider it to be OK, otherwise report an error code (no action etc).
 		return (argc == 0) ? 0 : 1;
-#endif   
+#endif /* SLIC3R_GUI */
     }
     
     return 0;
@@ -563,7 +565,13 @@ bool CLI::setup(int argc, char **argv)
 void CLI::print_help(bool include_print_options, PrinterTechnology printer_technology) const 
 {
     boost::nowide::cout
-		<< "Slic3r Prusa Edition " << SLIC3R_BUILD << std::endl
+		<< "Slic3r Prusa Edition " << SLIC3R_BUILD 
+#ifdef SLIC3R_GUI
+        << " (with GUI support)"
+#else /* SLIC3R_GUI */
+        << " (without GUI support)"
+#endif /* SLIC3R_GUI */
+        << std::endl
         << "https://github.com/prusa3d/Slic3r" << std::endl << std::endl
         << "Usage: slic3r [ ACTIONS ] [ TRANSFORM ] [ OPTIONS ] [ file.stl ... ]" << std::endl
         << std::endl

src/slic3r_app_msvc.cpp

@@ -6,14 +6,20 @@
 #include <Windows.h>
 #include <shellapi.h>
 #include <wchar.h>
-// Let the NVIDIA and AMD know we want to use their graphics card
+
-// on a dual graphics card system.
+#ifdef SLIC3R_GUI
-__declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
+	// Let the NVIDIA and AMD know we want to use their graphics card
-__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+	// on a dual graphics card system.
+	__declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
+	__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+#endif /* SLIC3R_GUI */
 
 #include <stdlib.h>
 #include <stdio.h>
-#include <GL/GL.h>
+
+#ifdef SLIC3R_GUI
+	#include <GL/GL.h>
+#endif /* SLIC3R_GUI */
 
 #include <string>
 #include <vector>
@@ -23,6 +29,7 @@ __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
 
 #include <stdio.h>
 
+#ifdef SLIC3R_GUI
 class OpenGLVersionCheck
 {
 public:
@@ -188,6 +195,7 @@ protected:
 };
 
 bool OpenGLVersionCheck::message_pump_exit = false;
+#endif /* SLIC3R_GUI */
 
 extern "C" {
 	typedef int (__stdcall *Slic3rMainFunc)(int argc, wchar_t **argv);
@@ -206,17 +214,23 @@ int wmain(int argc, wchar_t **argv)
 
 	std::vector<wchar_t*> argv_extended;
 	argv_extended.emplace_back(argv[0]);
+
+#ifdef SLIC3R_GUI
 	// Here one may push some additional parameters based on the wrapper type.
 	bool force_mesa = false;
+#endif /* SLIC3R_GUI */
 	for (int i = 1; i < argc; ++ i) {
+#ifdef SLIC3R_GUI
 		if (wcscmp(argv[i], L"--sw-renderer") == 0)
 			force_mesa = true;
 		else if (wcscmp(argv[i], L"--no-sw-renderer") == 0)
 			force_mesa = false;
+#endif /* SLIC3R_GUI */
 		argv_extended.emplace_back(argv[i]);
 	}
 	argv_extended.emplace_back(nullptr);
 
+#ifdef SLIC3R_GUI
 	OpenGLVersionCheck opengl_version_check;
 	bool load_mesa = 
 		// Forced from the command line.
@@ -226,6 +240,7 @@ int wmain(int argc, wchar_t **argv)
 		::GetSystemMetrics(SM_REMOTESESSION) ||
 		// Try to load the default OpenGL driver and test its context version.
 		! opengl_version_check.load_opengl_dll() || ! opengl_version_check.is_version_greater_or_equal_to(2, 0);
+#endif /* SLIC3R_GUI */
 
 	wchar_t path_to_exe[MAX_PATH + 1] = { 0 };
 	::GetModuleFileNameW(nullptr, path_to_exe, MAX_PATH);
@@ -236,6 +251,7 @@ int wmain(int argc, wchar_t **argv)
 	_wsplitpath(path_to_exe, drive, dir, fname, ext);
 	_wmakepath(path_to_exe, drive, dir, nullptr, nullptr);
 
+#ifdef SLIC3R_GUI
 // https://wiki.qt.io/Cross_compiling_Mesa_for_Windows
 // http://download.qt.io/development_releases/prebuilt/llvmpipe/windows/
 	if (load_mesa) {
@@ -260,6 +276,7 @@ int wmain(int argc, wchar_t **argv)
 		printf("slic3r.dll was not loaded\n");
 		return -1;
 	}
+#endif /* SLIC3R_GUI */
 
 	// resolve function address here
 	slic3r_main = (Slic3rMainFunc)GetProcAddress(hInstance_Slic3r,