nrzled/rasterSPI: fix ordering

This is supposed to be sent out in GRB order (and the comment below also
below claims it), but the code (and corresponding unit tests) did output
RGB order.

nrzled/nrzled.go

@@ -309,8 +309,8 @@ func (d *Dev) rasterSPI(dst []byte, src []byte, srcHasAlpha bool) {
 		dOff := 3 * stride * i //3 channels * stride
 		r, g, b := src[sOff], src[sOff+1], src[sOff+2]
 		//grb color order, msb first
-		copy(dst[dOff+stride*0:dOff+stride*1], nrzMSB4[r][:])
+		copy(dst[dOff+stride*0:dOff+stride*1], nrzMSB4[g][:])
-		copy(dst[dOff+stride*1:dOff+stride*2], nrzMSB4[g][:])
+		copy(dst[dOff+stride*1:dOff+stride*2], nrzMSB4[r][:])
 		copy(dst[dOff+stride*2:dOff+stride*3], nrzMSB4[b][:])
 	}
 }

nrzled/nrzled_spi_test.go

@@ -165,7 +165,7 @@ var writeTests = []struct {
 			{0x80, 0xFF, 0x00, 0x00},
 		}),
 		want: []byte{
-			/*80*/ 0xE8, 0x88, 0x88, 0x88 /*FF*/, 0xEE, 0xEE, 0xEE, 0xEE /*00*/, 0x88, 0x88, 0x88, 0x88,
+			/*FF*/ 0xEE, 0xEE, 0xEE, 0xEE /*80*/, 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
 			/*EOF*/ 0x00, 0x00, 0x00,
 		},
 		opts: Opts{
@@ -180,7 +180,7 @@ var writeTests = []struct {
 			{0x80, 0x00, 0x00, 0x00},
 		}),
 		want: []byte{
-			/*80*/ 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
+			/*00*/ 0x88, 0x88, 0x88, 0x88 /*80*/, 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
 			/*EOF*/ 0x00, 0x00, 0x00,
 		},
 		opts: Opts{
@@ -195,7 +195,7 @@ var writeTests = []struct {
 			{0x00, 0x80, 0x00, 0x00},
 		}),
 		want: []byte{
-			/*00*/ 0x88, 0x88, 0x88, 0x88 /*80*/, 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
+			/*80*/ 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
 			/*EOF*/ 0x00, 0x00, 0x00,
 		},
 		opts: Opts{
@@ -241,8 +241,8 @@ var writeTests = []struct {
 			/*F0*/ 0xEE, 0xEE, 0x88, 0x88 /*F0*/, 0xEE, 0xEE, 0x88, 0x88 /*F0*/, 0xEE, 0xEE, 0x88, 0x88,
 			/*80*/ 0xE8, 0x88, 0x88, 0x88 /*80*/, 0xE8, 0x88, 0x88, 0x88 /*80*/, 0xE8, 0x88, 0x88, 0x88,
 
-			/*80*/ 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
 			/*00*/ 0x88, 0x88, 0x88, 0x88 /*80*/, 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
+			/*80*/ 0xE8, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88,
 			/*00*/ 0x88, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88 /*80*/, 0xE8, 0x88, 0x88, 0x88,
 
 			/*00*/ 0x88, 0x88, 0x88, 0x88 /*00*/, 0x88, 0x88, 0x88, 0x88 /*10*/, 0x88, 0x8E, 0x88, 0x88,
@@ -351,8 +351,8 @@ var drawTests = []struct {
 		want: func() []byte {
 			var b []byte
 			for i := 0; i < 4; i++ {
-				b = append(b, 0x88, 0x88, 0x88, 0x88) //0x00
 				b = append(b, 0xE8, 0x88, 0x88, 0x88) //0x80
+				b = append(b, 0x88, 0x88, 0x88, 0x88) //0x00
 				b = append(b, 0xEE, 0xEE, 0xEE, 0xEE) //0xFF
 			}
 			for i := 0; i < 3; i++ {