/*
   This sketch is the same as the Font_Demo_2 example, except the fonts in this
   example are in a FLASH (program memory) array. This means that processors
   such as the STM32 series that are not supported by a SPIFFS library can use
   smooth (anti-aliased) fonts.
 */
 
 /*
   There are four different methods of plotting anti-aliased fonts to the screen.
 
   This sketch uses method 2, using graphics calls plotting direct to the TFT:
     tft.drawString(string, x, y);
     tft.drawNumber(integer, x, y);
     tft.drawFloat(float, dp, x, y); // dp = number of decimal places
 
   setTextDatum() and setTextPadding() functions work with those draw functions.
 
   This method is good for static text that does not change often because changing
   values may flicker.
   
 */
 
 // A processing sketch to create new fonts can be found in the Tools folder of TFT_eSPI
 // https://github.com/Bodmer/TFT_eSPI/tree/master/Tools/Create_Smooth_Font/Create_font
 
 // This sketch uses font files created from the Noto family of fonts:
 // https://www.google.com/get/noto/
 
 #include "NotoSansBold15.h"
 #include "NotoSansBold36.h"
 
 // The font names are arrays references, thus must NOT be in quotes ""
 #define AA_FONT_SMALL NotoSansBold15
 #define AA_FONT_LARGE NotoSansBold36
 
 #include <SPI.h>
 #include <TFT_eSPI.h>       // Hardware-specific library
 
 TFT_eSPI tft = TFT_eSPI();
 
 void setup(void) {
 
   Serial.begin(250000);
 
   tft.begin();
 
   tft.setRotation(1);
 }
 
 void loop() {
 
   tft.fillScreen(TFT_BLACK);
 
   tft.setTextColor(TFT_WHITE, TFT_BLACK); // Set the font colour and the background colour
 
   tft.setTextDatum(TC_DATUM); // Top Centre datum
 
   int xpos = tft.width() / 2; // Half the screen width
   int ypos = 10;
 
 
   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
   // Small font
   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
   tft.loadFont(AA_FONT_SMALL); // Must load the font first
 
   tft.drawString("Small 15pt font", xpos, ypos);
 
   ypos += tft.fontHeight();   // Get the font height and move ypos down
 
   tft.setTextColor(TFT_GREEN, TFT_BLACK);
 
   // If the string does not fit the screen width, then the next character will wrap to a new line
   tft.drawString("Ode To A Small Lump Of Green Putty I Found In My Armpit One Midsummer Morning", xpos, ypos);
 
   tft.setTextColor(TFT_GREEN, TFT_BLUE); // Background colour does not match the screen background!
   tft.drawString("Anti-aliasing causes odd looking shadow effects if the text and screen background colours are not the same!", xpos, ypos + 60);
 
   tft.unloadFont(); // Remove the font to recover memory used
 
   delay(5000);
 
   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
   // Large font
   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
   tft.loadFont(AA_FONT_LARGE); // Load another different font
 
   tft.fillScreen(TFT_BLACK);
 
   // The "true" parameter forces background drawing for smooth fonts
   tft.setTextColor(TFT_GREEN, TFT_BLUE, true); // Change the font colour and the background colour
 
   tft.drawString("36pt font", xpos, ypos);
 
   ypos += tft.fontHeight();  // Get the font height and move ypos down
 
   // Set text padding to 100 pixels wide area to over-write old values on screen
   tft.setTextPadding(100);
 
   // Draw changing numbers - likely to flicker using this plot method!
   for (int i = 0; i <= 99; i++) {
     tft.drawFloat(i / 10.0, 1, xpos, ypos);
     delay (200);
   }
 
   // Turn off text padding by setting value to 0
   tft.setTextPadding(0);
 
   tft.unloadFont(); // Remove the font to recover memory used
 
   delay(5000);
 
   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
   // Setting the 12 datum positions works with free fonts
   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
   // Integer numbers, floats and strings can be drawn relative to a x,y datum, e.g.:
   // tft.drawNumber( 123, x, y);
   // tft.drawFloat( 1.23, dp, x, y); // Where dp is number of decimal places to show
   // tft.drawString( "Abc", x, y);
 
   tft.fillScreen(TFT_BLACK);
 
   tft.setTextColor(TFT_DARKGREY, TFT_BLACK, false);
 
   // Use middle of screen as datum
   xpos = tft.width() /2;
   ypos = tft.height()/2;
 
   tft.loadFont(AA_FONT_SMALL);
   tft.setTextDatum(TL_DATUM);
   tft.drawString("[Top left]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(TC_DATUM);
   tft.drawString("[Top centre]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(TR_DATUM);
   tft.drawString("[Top right]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(ML_DATUM);
   tft.drawString("[Middle left]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(MC_DATUM);
   tft.drawString("[Middle centre]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(MR_DATUM);
   tft.drawString("[Middle right]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(BL_DATUM);
   tft.drawString("[Bottom left]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(BC_DATUM);
   tft.drawString("[Bottom centre]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(BR_DATUM);
   tft.drawString("[Bottom right]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(L_BASELINE);
   tft.drawString("[Left baseline]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(C_BASELINE);
   tft.drawString("[Centre baseline]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.fillScreen(TFT_BLACK);
   tft.setTextDatum(R_BASELINE);
   tft.drawString("[Right baseline]", xpos, ypos);
   drawDatumMarker(xpos, ypos);
   delay(1000);
 
   tft.unloadFont(); // Remove the font to recover memory used
 
   delay(4000);
 
 }
 
 // Draw a + mark centred on x,y
 void drawDatumMarker(int x, int y)
 {
   tft.drawLine(x - 5, y, x + 5, y, TFT_GREEN);
   tft.drawLine(x, y - 5, x, y + 5, TFT_GREEN);
 }

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