BW invert (#21955)

* bw invert option

* invert bw

lib/lib_display/Display_Renderer-gemu-1.0/src/renderer.h

@@ -36,7 +36,7 @@ typedef struct LVGL_PARAMS {
       uint8_t swap_color : 1;
       uint8_t async_dma : 1;   // force DMA completion before returning, avoid conflict with other devices on same bus. If set you should make sure the display is the only device on the bus
       uint8_t busy_invert : 1;
-      uint8_t resvd_2 : 1;
+      uint8_t invert_bw : 1;
       uint8_t resvd_3 : 1;
       uint8_t resvd_4 : 1;
       uint8_t resvd_5 : 1;

lib/lib_display/UDisplay/uDisplay.cpp

@@ -2197,12 +2197,22 @@ void uDisplay::pushColorsMono(uint16_t *data, uint16_t len, bool rgb16_swap) {
 
   for (uint32_t y = seta_yp1; y < seta_yp2; y++) {
     seta_yp1++;
-    for (uint32_t x = seta_xp1; x < seta_xp2; x++) {
-      uint16_t color = *data++;
-      if (bpp == 1) color = (color & rgb16_to_mono_mask) ? 1 : 0;
-      drawPixel(x, y, color);   // todo - inline the method to save speed
-      len--;
-      if (!len) return;         // failsafe - exist if len (pixel number) is exhausted
+    if (lvgl_param.invert_bw) {
+      for (uint32_t x = seta_xp1; x < seta_xp2; x++) {
+        uint16_t color = *data++;
+        if (bpp == 1) color = (color & rgb16_to_mono_mask) ? 0 : 1;
+        drawPixel(x, y, color);   // todo - inline the method to save speed
+        len--;
+        if (!len) return;         // failsafe - exist if len (pixel number) is exhausted
+      }
+    } else {
+      for (uint32_t x = seta_xp1; x < seta_xp2; x++) {
+        uint16_t color = *data++;
+        if (bpp == 1) color = (color & rgb16_to_mono_mask) ? 1 : 0;
+        drawPixel(x, y, color);   // todo - inline the method to save speed
+        len--;
+        if (!len) return;         // failsafe - exist if len (pixel number) is exhausted
+      }
     }
   }
 }