bitmap drawing: Use extra bit in mask to avoid nested if() in switch-cases.

Speeds up alpha bitmap drawing by up to 10%. mono bitmap drawing is also a tiny bit faster.

Change-Id: I5a9379740c1a0091de9c621aabbe57d767ce2905

1 files changed, 2 insertions, 0 deletions

diff --git a/firmware/export/lcd.h b/firmware/export/lcd.h
index a82c00534d..5ad2d83513 100644
--- a/firmware/export/lcd.h
+++ b/firmware/export/lcd.h
@@ -289,6 +289,8 @@ extern void lcd_jump_scroll_delay(int ms);
 #define DRMODE_FG         2
 #define DRMODE_SOLID      3
 #define DRMODE_INVERSEVID 4 /* used as bit modifier for basic modes */
+/* Internal drawmode modifiers. DO NOT use with set_drawmode() */
+#define DRMODE_INT_MOD  8
 
 /* Low-level drawing function types */
 typedef void lcd_pixelfunc_type(int x, int y);