FIX: support alpha color in 3DScene

Change-Id: Id6e6346b8ddb77a911ff5d56331d9088ca41017e

src/slic3r/GUI/3DScene.cpp

@@ -1518,27 +1518,28 @@ void GLVolumeCollection::update_colors_by_extruder(const DynamicPrintConfig* con
     struct Color
     {
         std::string text;
-        unsigned char rgb[3];
+        unsigned char rgba[4];
 
         Color()
             : text("")
         {
-            rgb[0] = 255;
-            rgb[1] = 255;
-            rgb[2] = 255;
+            rgba[0] = 255;
+            rgba[1] = 255;
+            rgba[2] = 255;
+            rgba[3] = 255;
         }
 
-        void set(const std::string& text, unsigned char* rgb)
+        void set(const std::string& text, unsigned char* rgba)
         {
             this->text = text;
-            ::memcpy((void*)this->rgb, (const void*)rgb, 3 * sizeof(unsigned char));
+            ::memcpy((void*)this->rgba, (const void*)rgba, 4 * sizeof(unsigned char));
         }
     };
 
     if (config == nullptr)
         return;
 
-    unsigned char rgb[3];
+    unsigned char rgba[4];
     std::vector<Color> colors;
 
     if (static_cast<PrinterTechnology>(config->opt_int("printer_technology")) == ptSLA)
@@ -1546,9 +1547,9 @@ void GLVolumeCollection::update_colors_by_extruder(const DynamicPrintConfig* con
         const std::string& txt_color = config->opt_string("material_colour").empty() ?
                                        print_config_def.get("material_colour")->get_default_value<ConfigOptionString>()->value :
                                        config->opt_string("material_colour");
-        if (Slic3r::GUI::BitmapCache::parse_color(txt_color, rgb)) {
+        if (Slic3r::GUI::BitmapCache::parse_color4(txt_color, rgba)) {
             colors.resize(1);
-            colors[0].set(txt_color, rgb);
+            colors[0].set(txt_color, rgba);
         }
     }
     else
@@ -1564,8 +1565,8 @@ void GLVolumeCollection::update_colors_by_extruder(const DynamicPrintConfig* con
 
         for (unsigned int i = 0; i < colors_count; ++i) {
             const std::string& txt_color = config->opt_string("filament_colour", i);
-            if (Slic3r::GUI::BitmapCache::parse_color(txt_color, rgb))
-                colors[i].set(txt_color, rgb);
+            if (Slic3r::GUI::BitmapCache::parse_color4(txt_color, rgba))
+                colors[i].set(txt_color, rgba);
         }
     }
 
@@ -1579,8 +1580,8 @@ void GLVolumeCollection::update_colors_by_extruder(const DynamicPrintConfig* con
 
         const Color& color = colors[extruder_id];
         if (!color.text.empty()) {
-            for (int i = 0; i < 3; ++i) {
-                volume->color[i] = (float)color.rgb[i] * inv_255;
+            for (int i = 0; i < 4; ++i) {
+                volume->color[i] = (float)color.rgba[i] * inv_255;
             }
         }
     }

src/slic3r/GUI/BitmapCache.cpp

@@ -444,5 +444,21 @@ bool BitmapCache::parse_color(const std::string& scolor, unsigned char* rgb_out)
     return true;
 }
 
+bool BitmapCache::parse_color4(const std::string& scolor, unsigned char* rgba_out)
+{
+    rgba_out[0] = rgba_out[1] = rgba_out[2] = 0; rgba_out[3] = 255;
+    if ((scolor.size() != 7 && scolor.size() != 9) || scolor.front() != '#')
+        return false;
+    const char* c = scolor.data() + 1;
+    for (size_t i = 0; i < scolor.size() / 2; ++i) {
+        int digit1 = hex_digit_to_int(*c++);
+        int digit2 = hex_digit_to_int(*c++);
+        if (digit1 == -1 || digit2 == -1)
+            return false;
+        rgba_out[i] = (unsigned char)(digit1 * 16 + digit2);
+    }
+    return true;
+}
+
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/BitmapCache.hpp

@@ -48,6 +48,7 @@ public:
 	wxBitmap 		mkclear(size_t width, size_t height) { return mksolid(width, height, 0, 0, 0, wxALPHA_TRANSPARENT); }
 
 	static bool     parse_color(const std::string& scolor, unsigned char* rgb_out);
+	static bool     parse_color4(const std::string& scolor, unsigned char* rgba_out);
 
 private:
     std::map<std::string, wxBitmap*>	m_map;

src/slic3r/GUI/PresetComboBoxes.cpp

@@ -486,16 +486,6 @@ wxBitmap* PresetComboBox::get_bmp(  std::string bitmap_key, bool wide_icons, con
         if (m_type == Preset::TYPE_FILAMENT && !filament_rgb.empty())
         {
             // BBS
-#if 0
-            unsigned char rgb[3];
-            // Paint the color bars.
-            bitmap_cache().parse_color(filament_rgb, rgb);
-            bmps.emplace_back(bitmap_cache().mksolid(is_single_bar ? wide_icon_width : norm_icon_width, icon_height, rgb, false, 1, dark_mode));
-            if (!is_single_bar) {
-                bitmap_cache().parse_color(extruder_rgb, rgb);
-                bmps.emplace_back(bitmap_cache().mksolid(thin_icon_width, icon_height, rgb, false, 1, dark_mode));
-            }
-#endif
             // Paint a lock at the system presets.
             bmps.emplace_back(bitmap_cache().mkclear(space_icon_width, icon_height));
         }
@@ -920,10 +910,6 @@ void PlaterPresetComboBox::update()
     {
         //unsigned char rgb[3];
         filament_color = m_preset_bundle->project_config.opt_string("filament_colour", (unsigned int) m_filament_idx);
-        //if (!bitmap_cache().parse_color(filament_color, rgb))
-        //    // Extruder color is not defined.
-        //    filament_color.clear();
-        // BBS
         wxColor clr(filament_color);
         clr_picker->SetBitmap(*get_extruder_color_icons(true)[m_filament_idx]);
 #ifdef __WXOSX__