individual pixel color is not a Core concept

- core only deals with pixel data in bytes (groups of 8 pixels)
- invert has no meaning at all to Core

src/Arduboy.h

@@ -19,6 +19,11 @@
 
 #define PIXEL_SAFE_MODE
 
+// pixel colors
+#define INVERT 2 //< lit/unlit pixel
+#define WHITE 1 //< lit pixel
+#define BLACK 0 //< unlit pixel
+
 // compare Vcc to 1.1 bandgap
 #define ADC_VOLTAGE (_BV(REFS0) | _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
 // compare temperature to 2.5 internal reference and _BV(MUX5)

src/core/core.h

@@ -133,10 +133,6 @@
 #define WIDTH 128
 #define HEIGHT 64
 
-#define INVERT 2 //< lit/unlit pixel
-#define WHITE 1 //< lit pixel
-#define BLACK 0 //< unlit pixel
-
 class ArduboyCore
 {
 public: