FIX: do not show the background bitmap when model is white.

Jira: STUDIO-5620

Signed-off-by: wenjie.guo <wenjie.guo@bambulab.com>
Change-Id: Ic61ba2ca53d071c815323b980abf79c067770b58
(cherry picked from commit cc55e02e753e3ae88d1a0bd0d9fc51aab9ab7fd8)

src/slic3r/GUI/GUI_App.hpp

@@ -34,6 +34,7 @@
 #define TIMEOUT_RESPONSE            15
 
 #define BE_UNACTED_ON               0x00200001
+#define SHOW_BACKGROUND_BITMAP_PIXEL_THRESHOLD 80
 #ifndef _MSW_DARK_MODE
     #define _MSW_DARK_MODE            1
 #endif // _MSW_DARK_MODE

src/slic3r/GUI/SelectMachine.cpp

@@ -45,7 +45,6 @@ wxDEFINE_EVENT(EVT_CLEAR_IPADDRESS, wxCommandEvent);
 
 static wxString task_canceled_text = _L("Task canceled");
 
-
 std::string get_print_status_info(PrintDialogStatus status)
 {
     switch(status) {
@@ -4447,9 +4446,10 @@ void EditDevNameDialog::on_edit_name(wxCommandEvent &e)
      Fit();
  }
 
- void ThumbnailPanel::set_thumbnail(wxImage img)
+ void ThumbnailPanel::set_thumbnail(wxImage &img)
  {
-     m_bitmap = img;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
+     m_brightness_value = get_brightness_value(img);
+     m_bitmap = img;
      //Paint the background bitmap to the thumbnail bitmap with wxMemoryDC
      wxMemoryDC dc;
      bitmap_with_background.Create(wxSize(m_bitmap.GetWidth(), m_bitmap.GetHeight()));
@@ -4468,7 +4468,7 @@ void EditDevNameDialog::on_edit_name(wxCommandEvent &e)
 
  void ThumbnailPanel::render(wxDC& dc) {
      
-     if (wxGetApp().dark_mode()) {
+     if (wxGetApp().dark_mode() && m_brightness_value < SHOW_BACKGROUND_BITMAP_PIXEL_THRESHOLD) {
          #ifdef __WXMSW__
              wxMemoryDC memdc;
              wxBitmap bmp(GetSize());

src/slic3r/GUI/SelectMachine.hpp

@@ -62,6 +62,30 @@ enum PrintFromType {
     FROM_SDCARD_VIEW,
 };
 
+static int get_brightness_value(wxImage image) {
+    wxImage grayImage = image.ConvertToGreyscale();
+
+    int width = grayImage.GetWidth();
+    int height = grayImage.GetHeight();
+
+    int totalLuminance = 0;
+    unsigned char alpha;
+    int num_none_transparent = 0;
+    for (int y = 0; y < height; y+=2) {
+
+        for (int x = 0; x < width; x+=2) {
+
+            alpha = image.GetAlpha(x, y);
+            if (alpha != 0) {
+                wxColour pixelColor = grayImage.GetRed(x, y);
+                totalLuminance += pixelColor.Red();
+                num_none_transparent = num_none_transparent + 1;
+            }
+        }
+    }
+    return totalLuminance / num_none_transparent;
+}
+
 class Material
 {
 public:
@@ -513,12 +537,12 @@ public:
     void OnPaint(wxPaintEvent &event);
     void PaintBackground(wxDC &dc);
     void OnEraseBackground(wxEraseEvent &event);
-    void set_thumbnail(wxImage img);
+    void set_thumbnail(wxImage &img);
     void render(wxDC &dc);
 private:
     ScalableBitmap m_background_bitmap;
     wxBitmap bitmap_with_background;
-    
+    int m_brightness_value{ -1 };
 };
 
 }} // namespace Slic3r::GUI

src/slic3r/GUI/StatusPanel.cpp

@@ -547,11 +547,19 @@ void PrintingTaskPanel::create_panel(wxWindow* parent)
 void PrintingTaskPanel::paint(wxPaintEvent&)
 {
     wxPaintDC dc(m_bitmap_thumbnail);
-    if (wxGetApp().dark_mode())
+    if (wxGetApp().dark_mode()) {
-        dc.DrawBitmap(m_bitmap_background.bmp(), 0, 0);
+        if (m_brightness_value > 0 && m_brightness_value < SHOW_BACKGROUND_BITMAP_PIXEL_THRESHOLD) {
+            dc.DrawBitmap(m_bitmap_background.bmp(), 0, 0);
+            dc.SetTextForeground(*wxBLACK);
+        }
+        else
+            dc.SetTextForeground(*wxWHITE);
+    }
+    else
+        dc.SetTextForeground(*wxBLACK);
     dc.DrawBitmap(m_thumbnail_bmp_display, wxPoint(0, 0));
-    dc.SetTextForeground(*wxBLACK);
     dc.SetFont(Label::Body_12);
+    
     if (m_plate_index >= 0) {
         wxString plate_id_str = wxString::Format("%d", m_plate_index);
         dc.DrawText(plate_id_str, wxPoint(4, 4));
@@ -1876,6 +1884,7 @@ void StatusPanel::on_webrequest_state(wxWebRequestEvent &evt)
             img_list.insert(std::make_pair(m_request_url, img));
             wxImage resize_img = img.Scale(m_project_task_panel->get_bitmap_thumbnail()->GetSize().x, m_project_task_panel->get_bitmap_thumbnail()->GetSize().y, wxIMAGE_QUALITY_HIGH);
             m_project_task_panel->set_thumbnail_img(resize_img);
+            m_project_task_panel->set_brightness_value(get_brightness_value(resize_img));
         }
         if (obj) {
             m_project_task_panel->set_plate_index(obj->m_plate_index);
@@ -3021,6 +3030,7 @@ void StatusPanel::update_cloud_subtask(MachineObject *obj)
                         img = it->second;
                         wxImage resize_img = img.Scale(m_project_task_panel->get_bitmap_thumbnail()->GetSize().x, m_project_task_panel->get_bitmap_thumbnail()->GetSize().y);
                         m_project_task_panel->set_thumbnail_img(resize_img);
+                        m_project_task_panel->set_brightness_value(get_brightness_value(resize_img));
                     }
                     if (this->obj) {
                         m_project_task_panel->set_plate_index(obj->m_plate_index);

src/slic3r/GUI/StatusPanel.hpp

@@ -204,6 +204,7 @@ private:
     ProgressBar*    m_gauge_progress;
     Label* m_error_text;
     PrintingTaskType m_type;
+    int m_brightness_value{ -1 };
 
 public:
     void init_bitmaps();
@@ -225,6 +226,7 @@ public:
     void show_priting_use_info(bool show, wxString time = wxEmptyString, wxString weight = wxEmptyString);
     void show_profile_info(bool show, wxString profile = wxEmptyString);
     void set_thumbnail_img(const wxBitmap& bmp);
+    void set_brightness_value(int value) { m_brightness_value = value; }
     void set_plate_index(int plate_idx = -1);
     void market_scoring_show();
     void market_scoring_hide();
@@ -244,7 +246,6 @@ public:
     void set_star_count_dirty(bool dirty) { m_star_count_dirty = dirty; }
     void                           set_has_reted_text(bool has_rated);
     void paint(wxPaintEvent&);
-
 };
 
 class StatusBasePanel : public wxScrolledWindow