Better memory management for large apps with many windows

lib/gui/src/ElementBase.cpp

@@ -73,7 +73,10 @@ void gui::ElementBase::renderAll(bool onScreen)
             m_surface = nullptr;
 
         if (m_surface == nullptr)
+        {
+            freeRamFor(m_width * m_height, this->getMaster());
             m_surface = std::make_shared<graphics::Surface>(m_width, m_height);
+        }
 
         // Render the element
         render();
@@ -644,3 +647,24 @@ gui::ElementBase *gui::ElementBase::getElementAt(int index) {
     return nullptr;
 
 }
+
+#include "elements/Window.hpp"
+
+void gui::ElementBase::freeRamFor(uint32_t size, ElementBase* window)
+{
+    #ifdef ESP_PLATFORM
+    size_t free = heap_caps_get_largest_free_block(MALLOC_CAP_8BIT);
+
+    if (free < size + 1000000)
+    {
+        std::cout << "Not enough RAM, free : " << free << " need : " << size << "\n     -> will free other windows" << std::endl;
+        for (auto i : gui::elements::Window::windows)
+        {
+            if(i != window)
+            {
+                i->free();
+            }
+        }
+    }
+    #endif
+}

lib/gui/src/ElementBase.hpp

@@ -102,6 +102,8 @@ namespace gui
         void forceUpdate();
 
     protected:
+        void freeRamFor(uint32_t size, ElementBase* window);
+
         // variables générales
         uint16_t m_width, m_height;
 

lib/gui/src/elements/Window.cpp

@@ -16,12 +16,19 @@ namespace gui::elements {
         m_width = graphics::getScreenWidth();
         m_height = graphics::getScreenHeight();
         m_backgroundColor = COLOR_WHITE;
+
+        windows.push_back(this);
     }
 
-    Window::~Window() = default;
+    Window::~Window()
+    {
+        windows.erase(std::remove(windows.begin(), windows.end(), this), windows.end());
+    }
 
     void Window::render()
     {
         m_surface->fillRect(0, 0, m_width, m_height, m_backgroundColor);
     }
+
+    std::vector<Window*> Window::windows;
 } // gui::elements

lib/gui/src/elements/Window.hpp

@@ -17,6 +17,8 @@ namespace gui::elements
         Window();
         ~Window() override;
 
+        static std::vector<Window*> windows;
+
         void render() override;
     };
 } // gui::elements

src/main.cpp

@@ -331,7 +331,8 @@ void setup()
     AppManager::init();
 
     #ifdef ESP_PLATFORM
-    xTaskCreateUniversal(mainLoop,"newloop", 32*1024, NULL, 1, NULL, ARDUINO_RUNNING_CORE);
+    //                                     // stack size: >32k = crash due to image decoder in stack
+    xTaskCreateUniversal(mainLoop,"newloop", 16*1024, NULL, 1, NULL, ARDUINO_RUNNING_CORE);
     vTaskDelete(NULL);
     #else
     mainLoop(NULL);

storage/apps/calendrier/config.json

@@ -1 +1 @@
-{"day":{"heureFin":18, "heureDebut":9}, "displayBusinessWeek":false, "defaultView":"week", "displayWeekNum":true}
+{"defaultView":"week", "displayBusinessWeek":true, "displayWeekNum":true, "day":{"heureDebut":6, "heureFin":18}}