starting drawing text

- zlib from components
- framebuffer for faster drawing
- disable currently smartconfig

Signed-off-by: Peter Siegmund <peter@rdkr.com>

ePaper-ESP-IDF/components/mapView/mapView.cpp

@@ -1,21 +1,62 @@
 #include "mapView.h"
 
 #include <esp_task_wdt.h>
-
+#include <cstring>
+#include <string>
 #include "epd_driver.h"
+#include "fonts/opensans26b.h"
 #include "staticmap.h"
 #include "utilities.h"
 
+uint8_t* framebuffer;
+GFXfont currentFont;
+
+enum alignment { LEFT, RIGHT, CENTER };
+
+void drawString(int32_t x, int32_t y, std::string text, alignment align) {
+  char* data = const_cast<char*>(text.c_str());
+  int32_t x1, y1;  // the bounds of x,y and w and h of the variable 'text' in
+                   // pixels.
+  int32_t w, h;
+  int32_t xx = x, yy = y;
+  get_text_bounds(&currentFont, data, &xx, &yy, &x1, &y1, &w, &h, NULL);
+  if (align == RIGHT)
+    x = x - w;
+  if (align == CENTER)
+    x = x - w / 2;
+  int32_t cursor_y = y + h;
+  write_string(&currentFont, data, &x, &cursor_y, framebuffer);
+}
+
 void mapView(void* args) {
+  framebuffer =
+      (uint8_t*)heap_caps_malloc(EPD_WIDTH * EPD_HEIGHT / 2, MALLOC_CAP_SPIRAM);
+
+  if (!framebuffer) {
+    printf("alloc memory failed !!!");
+    while (1) {
+    }
+  }
+
+  std::memset(framebuffer, 0xFF, EPD_WIDTH * EPD_HEIGHT / 2);
+
   int32_t width = staticmap_width;
   int32_t height = staticmap_height;
   const uint8_t* data = staticmap_data;
 
   Rect_t area = {
       .x = EPD_WIDTH - width, .y = 0, .width = width, .height = height};
+  epd_copy_to_framebuffer(area, (uint8_t*)data, framebuffer);
+  epd_draw_rect(area.x, area.y, area.width, area.height, 0, framebuffer);
+
+  int32_t x = area.x / 2;
+  int32_t y = area.height / 2 - 26;
+  currentFont = OpenSans26B;
+  drawString(x, y, "Hello, World!", CENTER);
+
   epd_poweron();
   epd_clear();
-  epd_draw_image(area, (uint8_t*)data, BLACK_ON_WHITE);
+  epd_draw_grayscale_image(epd_full_screen(), framebuffer);
   epd_poweroff();
 
   while (1) {