Change 1.91 & 2.41 inch lvgl to use partial refresh, contribution from …

…@clydebarrow #16

src/LV_Helper.cpp

@@ -56,6 +56,19 @@ void lv_log_print_g_cb(const char *buf)
 }
 #endif
 
+static void lv_rounder_cb(lv_disp_drv_t *disp_drv, lv_area_t *area)
+{
+    // make sure all coordinates are even
+    if (area->x1 & 1)
+        area->x1--;
+    if (!(area->x2 & 1))
+        area->x2++;
+    if (area->y1 & 1)
+        area->y1--;
+    if (!(area->y2 & 1))
+        area->y2++;
+}
+
 void beginLvglHelper(LilyGo_Display &board, bool debug)
 {
 
@@ -80,8 +93,12 @@ void beginLvglHelper(LilyGo_Display &board, bool debug)
     disp_drv.ver_res = board.height();
     disp_drv.flush_cb = disp_flush;
     disp_drv.draw_buf = &draw_buf;
-    disp_drv.full_refresh = 1;
+    bool full_refresh = board.needFullRefresh();
+    disp_drv.full_refresh = full_refresh;
     disp_drv.user_data = &board;
+    if (!full_refresh) {
+        disp_drv.rounder_cb = lv_rounder_cb;
+    }
     lv_disp_drv_register( &disp_drv );
 
     if (board.hasTouch()) {

src/LilyGo_AMOLED.cpp

@@ -941,3 +941,10 @@ uint8_t LilyGo_AMOLED::getRotation()
     return (_rotation);
 }
 
+bool LilyGo_AMOLED::needFullRefresh()
+{
+    if(boards){
+        return boards->display.fullRefresh;
+    }
+    return false;
+}

src/LilyGo_AMOLED.h

@@ -80,6 +80,7 @@ typedef struct __DisplayConfigure {
     uint16_t width;
     uint16_t height;
     uint32_t frameBufferSize;
+    bool fullRefresh;
 } DisplayConfigure_t;
 
 typedef struct __BoardTouchPins {
@@ -142,7 +143,8 @@ static const DisplayConfigure_t SH8501_AMOLED  = {
     SH8501_INIT_SEQUENCE_LENGHT,
     SH8501_WIDTH, //width
     SH8501_HEIGHT, //height
-    SH8501_WIDTH *SH8501_HEIGHT * sizeof(uint16_t) //frameBufferSize
+    SH8501_WIDTH *SH8501_HEIGHT * sizeof(uint16_t), //frameBufferSize
+    true //fullRefresh
 };
 
 static const int AMOLED_147_BUTTONTS[2] = {0, 21};
@@ -173,7 +175,8 @@ static const DisplayConfigure_t RM67162_AMOLED  = {
     RM67162_INIT_SEQUENCE_LENGHT,
     RM67162_WIDTH,//width
     RM67162_HEIGHT,//height
-    0//frameBufferSize
+    0,//frameBufferSize
+    false //fullRefresh
 };
 
 
@@ -197,7 +200,8 @@ static const DisplayConfigure_t RM690B0_AMOLED  = {
     RM690B0_INIT_SEQUENCE_LENGHT,
     RM690B0_WIDTH,//width
     RM690B0_HEIGHT,//height
-    0//frameBufferSize
+    0,//frameBufferSize
+    false //fullRefresh
 };
 static const int AMOLED_241_BUTTONTS[1] = {0};
 static const BoardPmuPins_t AMOLED_241_PMU_PINS =  {6/*SDA*/, 7/*SCL*/, 5/*IRQ*/};
@@ -332,6 +336,8 @@ class LilyGo_AMOLED:
     void sleep();
     void wakeup();
     bool hasTouch();
+
+    bool needFullRefresh();
 private:
     bool initBUS();
     bool initPMU();

src/LilyGo_Display.h

@@ -30,6 +30,8 @@ class LilyGo_Display
     virtual uint8_t getPoint(int16_t *x, int16_t *y, uint8_t get_point ) = 0;
     virtual bool    hasTouch() = 0;
 
+    virtual bool needFullRefresh() = 0;
+
 protected:
     uint16_t _offset_x = 0;
     uint16_t _offset_y = 0;

src/LilyGo_Wristband.cpp

@@ -554,4 +554,7 @@ void LilyGo_Wristband::vibration(uint8_t duty, uint32_t delay_ms)
 #endif
 }
 
-
+bool LilyGo_Wristband::needFullRefresh()
+{
+    return true;
+}

src/LilyGo_Wristband.h

@@ -92,6 +92,7 @@ class LilyGo_Wristband :
     void enableTouchWakeup(int threshold = 2000);
     void sleep();
     void wakeup();
+    bool needFullRefresh();
 private:
     bool initBUS();
     void writeCommand(uint32_t cmd, uint8_t *pdat, uint32_t lenght);