Support for ESP32 PSRAM added

If PSRAM is fitted and enabled the Sprites are now created in PSRAM.
This makes multiple full screen buffers possible!

Extensions/Sprite.cpp

@@ -67,7 +67,13 @@ void* TFT_eSprite::createSprite(int16_t w, int16_t h, uint8_t frames)
   // hence will run faster in normal circumstances.
   if (_bpp == 16)
   {
+
+#if defined (ESP32) && defined (CONFIG_SPIRAM_SUPPORT)
+    if ( psramFound() ) _img8_1 = ( uint8_t*) ps_calloc(w * h + 1, sizeof(uint16_t));
+    else
+#endif
     _img8_1 = ( uint8_t*) calloc(w * h + 1, sizeof(uint16_t));
+
     _img8_2 = _img8_1;
     _img    = (uint16_t*) _img8_1;
 
@@ -80,6 +86,10 @@ void* TFT_eSprite::createSprite(int16_t w, int16_t h, uint8_t frames)
 
   else if (_bpp == 8)
   {
+#if defined (ESP32) && defined (CONFIG_SPIRAM_SUPPORT)
+    if ( psramFound() ) _img8_1 = ( uint8_t*) ps_calloc(w * h + 1, sizeof(uint8_t));
+    else
+#endif
     _img8_1 = ( uint8_t*) calloc(w * h + 1, sizeof(uint8_t));
 
     if (_img8_1)
@@ -103,7 +113,11 @@ void* TFT_eSprite::createSprite(int16_t w, int16_t h, uint8_t frames)
 
     if (frames > 2) frames = 2; // Currently restricted to 2 frame buffers
     if (frames < 1) frames = 1;
-    _img8 = ( uint8_t*) calloc(frames * (w>>3) * h + frames, sizeof(uint8_t)); // extra pixel added
+#if defined (ESP32) && defined (CONFIG_SPIRAM_SUPPORT)
+    if ( psramFound() ) _img8 = ( uint8_t*) ps_calloc(frames * (w>>3) * h + frames, sizeof(uint8_t));
+    else
+#endif
+    _img8 = ( uint8_t*) calloc(frames * (w>>3) * h + frames, sizeof(uint8_t));
 
     if (_img8)
     {

README.md

@@ -18,6 +18,8 @@ Drawing graphics into a sprite is very fast, for those familiar with the Adafrui
 
 Sprites can be plotted to the TFT with one colour being specified as "transparent", see Transparent_Sprite_Demo example.
 
+IF an ESP32 board with SPIRAM (i.e. PSRAM) fitted then Sprites will use the PSRAM memory and large full screen buffer Sprites can be created. Full screen Sprites take longer to render (~45ms for a 320 x 240 16 bit Sprite), so bear that in mind.
+
 The XPT2046 touch screen controller is supported. The SPI bus for the touch controller is shared with the TFT and only an additional chip select line is needed.
 
 The Button class from Adafruit_GFX is incorporated, with the enhancement that the button labels can be in any font.

library.json

 {
   "name": "TFT_eSPI",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "keywords": "tft, ePaper, display, ESP8266, NodeMCU, ESP32, M5Stack, ILI9341, ST7735, ILI9163, S6D02A1, ILI9486, ST7789",
   "description": "A TFT and ePaper SPI graphics library for ESP8266 and ESP32",
   "repository":

library.properties

 name=TFT_eSPI
-version=1.1.0
+version=1.1.1
 author=Bodmer
 maintainer=Bodmer
 sentence=A fast TFT graphics library for ESP8266 and ESP32 processors for the Arduino IDE