acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
Font_Demo_2.ino (7165B)
      1 /*
      2   There are four different methods of plotting anti-aliased fonts to the screen.
      3 
      4   This sketch uses method 2, using graphics calls plotting direct to the TFT:
      5     tft.drawString(string, x, y);
      6     tft.drawNumber(integer, x, y);
      7     tft.drawFloat(float, dp, x, y); // dp = number of decimal places
      8 
      9   setTextDatum() and setTextPadding() functions work with those draw functions.
     10 
     11   This method is good for static text that does not change often because changing
     12   values may flicker.
     13   
     14 */
     15 //  The fonts used are in the sketch data folder, press Ctrl+K to view.
     16 
     17 //  Upload the fonts and icons to SPIFFS (must set at least 1M for SPIFFS) using the
     18 //  "Tools"  "ESP8266 (or ESP32) Sketch Data Upload" menu option in the IDE.
     19 //  To add this option follow instructions here for the ESP8266:
     20 //  https://github.com/esp8266/arduino-esp8266fs-plugin
     21 //  or for the ESP32:
     22 //  https://github.com/me-no-dev/arduino-esp32fs-plugin
     23 
     24 //  Close the IDE and open again to see the new menu option.
     25 
     26 // A processing sketch to create new fonts can be found in the Tools folder of TFT_eSPI
     27 // https://github.com/Bodmer/TFT_eSPI/tree/master/Tools/Create_Smooth_Font/Create_font
     28 
     29 // This sketch uses font files created from the Noto family of fonts:
     30 // https://www.google.com/get/noto/
     31 
     32 #define AA_FONT_SMALL "NotoSansBold15"
     33 #define AA_FONT_LARGE "NotoSansBold36"
     34 
     35 // Font files are stored in SPIFFS, so load the library
     36 #include <FS.h>
     37 
     38 #include <SPI.h>
     39 #include <TFT_eSPI.h>       // Hardware-specific library
     40 
     41 TFT_eSPI tft = TFT_eSPI();
     42 
     43 void setup(void) {
     44 
     45   Serial.begin(250000);
     46 
     47   tft.begin();
     48 
     49   tft.setRotation(1);
     50 
     51   if (!SPIFFS.begin()) {
     52     Serial.println("SPIFFS initialisation failed!");
     53     while (1) yield(); // Stay here twiddling thumbs waiting
     54   }
     55   Serial.println("\r\nSPIFFS available!");
     56 
     57   // ESP32 will crash if any of the fonts are missing
     58   bool font_missing = false;
     59   if (SPIFFS.exists("/NotoSansBold15.vlw")    == false) font_missing = true;
     60   if (SPIFFS.exists("/NotoSansBold36.vlw")    == false) font_missing = true;
     61 
     62   if (font_missing)
     63   {
     64     Serial.println("\r\nFont missing in SPIFFS, did you upload it?");
     65     while(1) yield();
     66   }
     67   else Serial.println("\r\nFonts found OK.");
     68 }
     69 
     70 void loop() {
     71 
     72   tft.fillScreen(TFT_BLACK);
     73 
     74   tft.setTextColor(TFT_WHITE, TFT_BLACK); // Set the font colour and the background colour
     75 
     76   tft.setTextDatum(TC_DATUM); // Top Centre datum
     77 
     78   int xpos = tft.width() / 2; // Half the screen width
     79   int ypos = 10;
     80 
     81 
     82   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
     83   // Small font
     84   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
     85 
     86   tft.loadFont(AA_FONT_SMALL); // Must load the font first
     87 
     88   tft.drawString("Small 15pt font", xpos, ypos);
     89 
     90   ypos += tft.fontHeight();   // Get the font height and move ypos down
     91 
     92   tft.setTextColor(TFT_GREEN, TFT_BLACK);
     93 
     94   // If the string does not fit the screen width, then the next character will wrap to a new line
     95   tft.drawString("Ode To A Small Lump Of Green Putty I Found In My Armpit One Midsummer Morning", xpos, ypos);
     96 
     97   tft.setTextColor(TFT_GREEN, TFT_BLUE); // Background colour does not match the screen background!
     98   tft.drawString("Anti-aliasing causes odd looking shadow effects if the text and screen background colours are not the same!", xpos, ypos + 60);
     99 
    100   tft.unloadFont(); // Remove the font to recover memory used
    101 
    102   delay(5000);
    103 
    104   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    105   // Large font
    106   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    107 
    108   tft.loadFont(AA_FONT_LARGE); // Load another different font
    109 
    110   tft.fillScreen(TFT_BLACK);
    111 
    112   // The "true" parameter forces background drawing for smooth fonts
    113   tft.setTextColor(TFT_GREEN, TFT_BLUE, true); // Change the font colour and the background colour
    114 
    115   tft.drawString("36pt font", xpos, ypos);
    116 
    117   ypos += tft.fontHeight();  // Get the font height and move ypos down
    118 
    119   // Set text padding to 100 pixels wide area to over-write old values on screen
    120   tft.setTextPadding(100);
    121 
    122   // Draw changing numbers - likely to flicker using this plot method!
    123   for (int i = 0; i <= 20; i++) {
    124     tft.drawFloat(i / 10.0, 1, xpos, ypos);
    125     delay (200);
    126   }
    127 
    128   // Turn off text padding by setting value to 0
    129   tft.setTextPadding(0);
    130 
    131   tft.unloadFont(); // Remove the font to recover memory used
    132 
    133   delay(5000);
    134 
    135   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    136   // Setting the 12 datum positions works with free fonts
    137   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    138 
    139   // Integer numbers, floats and strings can be drawn relative to a x,y datum, e.g.:
    140   // tft.drawNumber( 123, x, y);
    141   // tft.drawFloat( 1.23, dp, x, y); // Where dp is number of decimal places to show
    142   // tft.drawString( "Abc", x, y);
    143 
    144   tft.fillScreen(TFT_BLACK);
    145 
    146   tft.setTextColor(TFT_DARKGREY, TFT_BLACK, false);
    147 
    148   // Use middle of screen as datum
    149   xpos = tft.width() /2;
    150   ypos = tft.height()/2;
    151 
    152   tft.loadFont(AA_FONT_SMALL);
    153   tft.setTextDatum(TL_DATUM);
    154   tft.drawString("[Top left]", xpos, ypos);
    155   drawDatumMarker(xpos, ypos);
    156   delay(1000);
    157 
    158   tft.fillScreen(TFT_BLACK);
    159   tft.setTextDatum(TC_DATUM);
    160   tft.drawString("[Top centre]", xpos, ypos);
    161   drawDatumMarker(xpos, ypos);
    162   delay(1000);
    163 
    164   tft.fillScreen(TFT_BLACK);
    165   tft.setTextDatum(TR_DATUM);
    166   tft.drawString("[Top right]", xpos, ypos);
    167   drawDatumMarker(xpos, ypos);
    168   delay(1000);
    169 
    170   tft.fillScreen(TFT_BLACK);
    171   tft.setTextDatum(ML_DATUM);
    172   tft.drawString("[Middle left]", xpos, ypos);
    173   drawDatumMarker(xpos, ypos);
    174   delay(1000);
    175 
    176   tft.fillScreen(TFT_BLACK);
    177   tft.setTextDatum(MC_DATUM);
    178   tft.drawString("[Middle centre]", xpos, ypos);
    179   drawDatumMarker(xpos, ypos);
    180   delay(1000);
    181 
    182   tft.fillScreen(TFT_BLACK);
    183   tft.setTextDatum(MR_DATUM);
    184   tft.drawString("[Middle right]", xpos, ypos);
    185   drawDatumMarker(xpos, ypos);
    186   delay(1000);
    187 
    188   tft.fillScreen(TFT_BLACK);
    189   tft.setTextDatum(BL_DATUM);
    190   tft.drawString("[Bottom left]", xpos, ypos);
    191   drawDatumMarker(xpos, ypos);
    192   delay(1000);
    193 
    194   tft.fillScreen(TFT_BLACK);
    195   tft.setTextDatum(BC_DATUM);
    196   tft.drawString("[Bottom centre]", xpos, ypos);
    197   drawDatumMarker(xpos, ypos);
    198   delay(1000);
    199 
    200   tft.fillScreen(TFT_BLACK);
    201   tft.setTextDatum(BR_DATUM);
    202   tft.drawString("[Bottom right]", xpos, ypos);
    203   drawDatumMarker(xpos, ypos);
    204   delay(1000);
    205 
    206   tft.fillScreen(TFT_BLACK);
    207   tft.setTextDatum(L_BASELINE);
    208   tft.drawString("[Left baseline]", xpos, ypos);
    209   drawDatumMarker(xpos, ypos);
    210   delay(1000);
    211 
    212   tft.fillScreen(TFT_BLACK);
    213   tft.setTextDatum(C_BASELINE);
    214   tft.drawString("[Centre baseline]", xpos, ypos);
    215   drawDatumMarker(xpos, ypos);
    216   delay(1000);
    217 
    218   tft.fillScreen(TFT_BLACK);
    219   tft.setTextDatum(R_BASELINE);
    220   tft.drawString("[Right baseline]", xpos, ypos);
    221   drawDatumMarker(xpos, ypos);
    222   delay(1000);
    223 
    224   tft.unloadFont(); // Remove the font to recover memory used
    225 
    226   delay(4000);
    227 
    228 }
    229 
    230 // Draw a + mark centred on x,y
    231 void drawDatumMarker(int x, int y)
    232 {
    233   tft.drawLine(x - 5, y, x + 5, y, TFT_GREEN);
    234   tft.drawLine(x, y - 5, x, y + 5, TFT_GREEN);
    235 }