More progress, implement testing application, polish color gradient calculation code as well

src/CMakeLists.txt

@@ -381,6 +381,7 @@ list(APPEND SOURCE_FILES
         displayapp/screens/Metronome.cpp
         displayapp/screens/Motion.cpp
         displayapp/screens/Weather.cpp
+        displayapp/screens/WeatherColorTester.cpp
         displayapp/screens/FirmwareValidation.cpp
         displayapp/screens/ApplicationList.cpp
         displayapp/screens/Notifications.cpp

src/displayapp/UserApps.h

@@ -15,6 +15,7 @@
 #include "displayapp/screens/WatchFacePineTimeStyle.h"
 #include "displayapp/screens/WatchFaceTerminal.h"
 #include "displayapp/screens/Weather.h"
+#include "displayapp/screens/WeatherColorTester.h"
 
 namespace Pinetime {
   namespace Applications {

src/displayapp/WeatherHelper.cpp

@@ -20,8 +20,11 @@
 #include <FreeRTOS.h>
 #include <lvgl/src/lv_misc/lv_color.h>
 #include <tuple>
+#include <vector>
+#include <array>
 #include <cstdint>
 #include <cstdio>
+#include <algorithm>
 #include <nrfx_log.h>
 
 using namespace Pinetime::Applications;
@@ -68,6 +71,13 @@ using namespace Pinetime::Applications;
       int outputRed = (redA + (redB - redA) * normalValue);
       int outputGreen = (greenA + (greenB - greenA) * normalValue);
       int outputBlue = (blueA + (blueB - blueA) * normalValue);
+      
+      //increase brightness
+      float incAmount = 1.2;
+      outputRed = std::min(255, static_cast<int>(outputRed*incAmount));
+      outputGreen = std::min(255, static_cast<int>(outputGreen*incAmount));
+      outputBlue = std::min(255, static_cast<int>(outputBlue*incAmount));
+      
       auto lerpOutput = LV_COLOR_MAKE(outputRed, outputGreen, outputBlue);
       NRF_LOG_INFO("pointA: %i, %i, %i", redA, greenA, blueA);
       NRF_LOG_INFO("pointB: %i, %i, %i", redB, greenB, blueB);
@@ -75,32 +85,26 @@ using namespace Pinetime::Applications;
       return lerpOutput;
     }
     
-    const lv_color_t WeatherHelper::TemperatureColor(int16_t temperature) {
-      const std::vector<int> colors = {0x5555ff, 0x00c9ff, 0x00ff3e, 0xff9b00, 0xff0000};
-      std::vector<lv_color_t> stops;
+    constexpr std::array<lv_color_t, 4> getColors() {
+      const std::array<int, 4> colors = {0x5555ff, 0x00c9ff, 0xff9b00, 0xff0000};
+      std::array<lv_color_t, 4> stops;
+      int8_t i = 0;
       for (auto colorVal: colors) {
-       stops.emplace_back(hexToFloat(colorVal));
+       stops[i++] = (hexToFloat(colorVal));
       }
+      return stops;
+    }
+    
+    const lv_color_t WeatherHelper::TemperatureColor(int16_t temperature) {
+      std::array<lv_color_t, 4> stops = getColors();
       int tempRounded = RoundTemperature(temperature);
       if (tempRounded < 0) {
          tempRounded = 1;
       }
       // convert temperature to range between newMin and newMax
-      float oldMax = 40;
-      float oldMin = 0;
-      float newMax = 1;
-      float newMin = 0;
       float oldRange = (oldMax - oldMin);
       float newRange = (newMax - newMin);
       float newValue = (((tempRounded - oldMin) * newRange) / oldRange) + newMin;
       newValue = normalize(newValue);
-      if (newValue <= .25f) {
-        return lerp(stops[0], stops[1], newValue);
-      } else if (newValue <= .50f) {
-        return lerp(stops[1], stops[2], newValue);
-      } else if (newValue <= .75f) {
-        return lerp(stops[2], stops[3], newValue);
-      } else {
-        return lerp(stops[3], stops[4], newValue);
-      }
+      return lerp(stops[0], stops[3], newValue);
     }

src/displayapp/WeatherHelper.h

@@ -15,7 +15,7 @@
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
-
+#pragma once
 #include <FreeRTOS.h>
 #include <lvgl/src/lv_misc/lv_color.h>
 
@@ -26,6 +26,10 @@ namespace Pinetime {
             static int16_t RoundTemperature(int16_t temp);
             static const lv_color_t TemperatureColor(int16_t temperature);
             static const char* floatToRgbHex(lv_color_t rgb);
+            constexpr static float oldMax = 50;
+            constexpr static float oldMin = 0;
+            constexpr static float newMax = 1;
+            constexpr static float newMin = 0;
       };
     }
  }

src/displayapp/apps/Apps.h.in

@@ -29,6 +29,7 @@ namespace Pinetime {
       Steps,
       Dice,
       Weather,
+      WeatherColorTester,
       PassKey,
       QuickSettings,
       Settings,

src/displayapp/apps/CMakeLists.txt

@@ -14,6 +14,7 @@ else ()
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Metronome")
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Navigation")
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Weather")
+    set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::WeatherColorTester")
     #set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Motion")
     set(USERAPP_TYPES "${DEFAULT_USER_APP_TYPES}" CACHE STRING "List of user apps to build into the firmware")
 endif ()

src/displayapp/screens/WeatherColorTester.cpp

@@ -0,0 +1,34 @@
+#include "displayapp/screens/WeatherColorTester.h"
+#include "displayapp/WeatherHelper.h"
+#include "displayapp/LittleVgl.h"
+#include <nrfx_log.h>
+#include <algorithm> // std::fill
+using namespace Pinetime::Applications::Screens;
+
+WeatherColorTester::WeatherColorTester(Pinetime::Components::LittleVgl& lvgl) : lvgl {lvgl} {
+    taskRefresh = lv_task_create(RefreshTaskCallback, LV_DISP_DEF_REFR_PERIOD, LV_TASK_PRIO_MID, this);
+    Refresh();
+}
+
+void WeatherColorTester::Refresh() { //WeatherHelper::oldMax
+    for (size_t i = 0; i < WeatherHelper::oldMax; ++i) {
+        // get current color
+        currentColor = WeatherHelper::TemperatureColor(i * 100);
+        // create area we want to color
+        lv_area_t area;
+        area.y1 = x + i;
+        area.x1 = 0;
+        area.y2 = (x + i) + 1;
+        area.x2 = y;
+        NRF_LOG_INFO("area coords: %i, %i, %i, %i", area.x1, area.y1, area.x2, area.y2);
+        // write the buffer to the display
+        lvgl.SetFullRefresh(Components::LittleVgl::FullRefreshDirections::None);
+        std::fill(buffer, buffer + bufferSize, currentColor);
+        lvgl.FlushDisplay(&area, buffer);
+    }
+}
+
+WeatherColorTester::~WeatherColorTester() {
+  lv_task_del(taskRefresh);
+  lv_obj_clean(lv_scr_act());
+}

src/displayapp/screens/WeatherColorTester.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "displayapp/apps/Apps.h"
+#include "displayapp/screens/Screen.h"
+#include "displayapp/Controllers.h"
+#include <lvgl/src/lv_hal/lv_hal_disp.h>
+#include "Symbols.h"
+
+namespace Pinetime {
+  namespace Applications {
+    namespace Screens {
+      class WeatherColorTester : public Screen {
+      public:
+        explicit WeatherColorTester(Pinetime::Components::LittleVgl& lvgl);
+        WeatherColorTester() = delete;
+        ~WeatherColorTester() override;
+        void Refresh() override;
+      private:
+        Pinetime::Components::LittleVgl& lvgl;
+        lv_task_t* taskRefresh;
+        static constexpr int x = 0;
+        static constexpr int y = 240;
+        static constexpr int bufferSize = (480);
+        lv_color_t buffer[bufferSize];
+
+        lv_color_t currentColor;
+        //static lv_disp_draw_buf_t disp_buf;
+        };
+    }
+    
+    
+    template <>
+    struct AppTraits<Apps::WeatherColorTester> {
+      static constexpr Apps app = Apps::WeatherColorTester;
+      static constexpr const char* icon = Screens::Symbols::bolt;
+      static Screens::Screen* Create(AppControllers& controllers) {
+        return new Screens::WeatherColorTester(controllers.lvgl);
+      }
+    };
+  }
+}