Add ExportBackgroundColor config to GUI and CLI

src/confscreen.cpp

@@ -94,6 +94,10 @@ void TextWindow::ScreenChangeFixExportColors(int link, uint32_t v) {
     SS.fixExportColors = !SS.fixExportColors;
 }
 
+void TextWindow::ScreenChangeExportBackgroundColor(int link, uint32_t v) {
+    SS.exportBackgroundColor = !SS.exportBackgroundColor;
+}
+
 void TextWindow::ScreenChangeBackFaces(int link, uint32_t v) {
     SS.drawBackFaces = !SS.drawBackFaces;
     SS.GW.Invalidate(/*clearPersistent=*/true);
@@ -299,6 +303,9 @@ void TextWindow::ShowConfiguration() {
     Printf(false, "  %Fd%f%Ll%s  fix white exported lines%E",
         &ScreenChangeFixExportColors,
         SS.fixExportColors ? CHECK_TRUE : CHECK_FALSE);
+    Printf(false, "  %Fd%f%Ll%s  export background color%E",
+        &ScreenChangeExportBackgroundColor,
+        SS.exportBackgroundColor ? CHECK_TRUE : CHECK_FALSE);
 
     Printf(false, "");
     Printf(false, "%Ft export canvas size:  "

src/platform/entrycli.cpp

@@ -25,6 +25,8 @@ Common options:
         piecewise linear, and exact surfaces into triangle meshes.
         For export commands, the unit is mm, and the default is 1.0 mm.
         For non-export commands, the unit is %%, and the default is 1.0 %%.
+    -b, --bg-color <on|off>
+        Whether to export the background colour in vector formats. Defaults to off.
 
 Commands:
     thumbnail --output <pattern> --size <size> --view <direction>
@@ -33,6 +35,7 @@ Commands:
         <size> is <width>x<height>, in pixels. Graphics acceleration is
         not used, and the output may look slightly different from the GUI.
     export-view --output <pattern> --view <direction> [--chord-tol <tolerance>]
+                [--bg-color <on|off>]
         Exports a view of the sketch, in a 2d vector format.
     export-wireframe --output <pattern> [--chord-tol <tolerance>]
         Exports a wireframe of the sketch, in a 3d vector format.
@@ -155,6 +158,21 @@ static bool RunCommand(const std::vector<std::string> args) {
         } else return false;
     };
 
+    bool bg_color = false;
+    auto ParseBgColor = [&](size_t &argn) {
+        if(argn + 1 < args.size() && (args[argn] == "--bg-color" ||
+                                      args[argn] == "-b")) {
+            argn++;
+            if(args[argn] == "on") {
+                bg_color = true;
+                return true;
+            } else if(args[argn] == "off") {
+                bg_color = false;
+                return true;
+            } else return false;
+        } else return false;
+    };
+
     unsigned width = 0, height = 0;
     if(args[1] == "thumbnail") {
         auto ParseSize = [&](size_t &argn) {
@@ -221,7 +239,8 @@ static bool RunCommand(const std::vector<std::string> args) {
             if(!(ParseInputFile(argn) ||
                  ParseOutputPattern(argn) ||
                  ParseViewDirection(argn) ||
-                 ParseChordTolerance(argn))) {
+                 ParseChordTolerance(argn) ||
+                 ParseBgColor(argn))) {
                 fprintf(stderr, "Unrecognized option '%s'.\n", args[argn].c_str());
                 return false;
             }
@@ -233,9 +252,10 @@ static bool RunCommand(const std::vector<std::string> args) {
         }
 
         runner = [&](const Platform::Path &output) {
-            SS.GW.projRight   = projRight;
-            SS.GW.projUp      = projUp;
-            SS.exportChordTol = chordTol;
+            SS.GW.projRight          = projRight;
+            SS.GW.projUp             = projUp;
+            SS.exportChordTol        = chordTol;
+            SS.exportBackgroundColor = bg_color;
 
             SS.ExportViewOrWireframeTo(output, /*exportWireframe=*/false);
         };

src/solvespace.cpp

@@ -68,6 +68,8 @@ void SolveSpaceUI::Init() {
     exportOffset = settings->ThawFloat("ExportOffset", 0.0);
     // Rewrite exported colors close to white into black (assuming white bg)
     fixExportColors = settings->ThawBool("FixExportColors", true);
+    // Export background color
+    exportBackgroundColor = settings->ThawBool("ExportBackgroundColor", false);
     // Draw back faces of triangles (when mesh is leaky/self-intersecting)
     drawBackFaces = settings->ThawBool("DrawBackFaces", true);
     // Use turntable mouse navigation
@@ -246,6 +248,8 @@ void SolveSpaceUI::Exit() {
     settings->FreezeFloat("ExportOffset", exportOffset);
     // Rewrite exported colors close to white into black (assuming white bg)
     settings->FreezeBool("FixExportColors", fixExportColors);
+    // Export background color
+    settings->FreezeBool("ExportBackgroundColor", exportBackgroundColor);
     // Draw back faces of triangles (when mesh is leaky/self-intersecting)
     settings->FreezeBool("DrawBackFaces", drawBackFaces);
     // Draw closed polygons areas

src/solvespace.h

@@ -559,6 +559,7 @@ public:
     double   exportScale;
     double   exportOffset;
     bool     fixExportColors;
+    bool     exportBackgroundColor;
     bool     drawBackFaces;
     bool     showContourAreas;
     bool     checkClosedContour;

src/ui.h

@@ -434,6 +434,7 @@ public:
     static void ScreenGoToWebsite(int link, uint32_t v);
 
     static void ScreenChangeFixExportColors(int link, uint32_t v);
+    static void ScreenChangeExportBackgroundColor(int link, uint32_t v);
     static void ScreenChangeBackFaces(int link, uint32_t v);
     static void ScreenChangeShowContourAreas(int link, uint32_t v);
     static void ScreenChangeCheckClosedContour(int link, uint32_t v);