From b9110f602fcd28ead0ed01b39a6a807a6b8c8235 Mon Sep 17 00:00:00 2001
From: gemu2015 <gmutz2010@googlemail.com>
Date: Sun, 11 Apr 2021 07:49:13 +0200
Subject: [PATCH] add full partial and full refresh

---
 lib/libesp32_epdiy/src/epd4in7.cpp  | 34 +++++++++++++++++++++++------
 lib/libesp32_epdiy/src/epd4in7.h    |  1 +
 tasmota/xdsp_16_esp32_epaper_47.ino |  4 ++--
 3 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/lib/libesp32_epdiy/src/epd4in7.cpp b/lib/libesp32_epdiy/src/epd4in7.cpp
index 93a9f859d..4f041b473 100644
--- a/lib/libesp32_epdiy/src/epd4in7.cpp
+++ b/lib/libesp32_epdiy/src/epd4in7.cpp
@@ -44,10 +44,14 @@
 
 extern uint8_t *buffer;
 
-int temperature;
+int temperature = 25;
 
 EpdiyHighlevelState hl;
 
+uint16_t Epd47::GetColorFromIndex(uint8_t index) {
+  return index & 0xf;
+}
+
 Epd47::Epd47(int16_t dwidth, int16_t dheight) :  Renderer(dwidth, dheight) {
   width = dwidth;
   height = dheight;
@@ -63,11 +67,27 @@ int32_t Epd47::Init(void) {
 
 void Epd47::DisplayInit(int8_t p, int8_t size, int8_t rot, int8_t font) {
 
-  if (p ==  DISPLAY_INIT_FULL) {
+
+  if (p ==  DISPLAY_INIT_MODE) {
     epd_poweron();
     epd_clear();
     epd_poweroff();
   }
+  if (p ==  DISPLAY_INIT_FULL) {
+    memset(hl.back_fb, 0xff, width * height / 2);
+    epd_poweron();
+    epd_clear();
+    epd_hl_update_screen(&hl, MODE_GC16, temperature);
+    epd_poweroff();
+    return;
+  }
+  if (p ==  DISPLAY_INIT_PARTIAL) {
+    memset(hl.back_fb, 0xff, width * height / 2);
+    epd_poweron();
+    epd_hl_update_screen(&hl, MODE_GL16, temperature);
+    epd_poweroff();
+    return;
+  }
   setRotation(rot);
   setTextWrap(false);
   cp437(true);
@@ -94,6 +114,7 @@ void Epd47::fillScreen(uint16_t color) {
 void Epd47::drawPixel(int16_t x, int16_t y, uint16_t color) {
 uint16_t xp = x;
 uint16_t yp = y;
+uint8_t *buf_ptr;
 
   switch (getRotation()) {
     case 1:
@@ -107,14 +128,13 @@ uint16_t yp = y;
     case 3:
       _swap(xp, yp);
       yp = height - yp - 1;
+
       break;
   }
 
-    uint32_t maxsize = width * height / 2;
-    uint8_t *buf_ptr = &buffer[yp * width / 2 + xp / 2];
-    if ((uint32_t)buf_ptr >= (uint32_t)buffer + maxsize) {
-      return;
-    }
+  if (xp >= width) return;
+  if (yp >= height) return;
+  buf_ptr = &buffer[yp * width / 2 + xp / 2];
 
     if (xp % 2) {
         *buf_ptr = (*buf_ptr & 0x0F) | (color << 4);
diff --git a/lib/libesp32_epdiy/src/epd4in7.h b/lib/libesp32_epdiy/src/epd4in7.h
index 86717e7f3..79a3081bb 100644
--- a/lib/libesp32_epdiy/src/epd4in7.h
+++ b/lib/libesp32_epdiy/src/epd4in7.h
@@ -51,6 +51,7 @@ public:
     void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
     void setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
     void pushColors(uint16_t *data, uint16_t len, boolean first);
+    uint16_t GetColorFromIndex(uint8_t index);
 private:
   uint16_t width;
   uint16_t height;
diff --git a/tasmota/xdsp_16_esp32_epaper_47.ino b/tasmota/xdsp_16_esp32_epaper_47.ino
index 63605c42a..990c92fdf 100644
--- a/tasmota/xdsp_16_esp32_epaper_47.ino
+++ b/tasmota/xdsp_16_esp32_epaper_47.ino
@@ -53,7 +53,7 @@ void EpdInitDriver47(void) {
     epd47->Init();
 
     renderer = epd47;
-    renderer->DisplayInit(DISPLAY_INIT_FULL, Settings.display_size, Settings.display_rotate, Settings.display_font);
+    renderer->DisplayInit(DISPLAY_INIT_MODE, Settings.display_size, Settings.display_rotate, Settings.display_font);
     renderer->setTextColor(EPD47_BLACK, EPD47_WHITE);
 
 #ifdef SHOW_SPLASH
@@ -98,4 +98,4 @@ bool Xdsp16(uint8_t function)
 
 #endif  // USE_LILYGO47
 #endif  // USE_DISPLAY
-#endif  // ESP32
\ No newline at end of file
+#endif  // ESP32