From 016f1a247af065df5c656620d41736705a64cf3a Mon Sep 17 00:00:00 2001
From: Jon Langseth <jon.langseth@lilug.no>
Date: Fri, 5 Jul 2013 12:11:04 +0200
Subject: [PATCH] Added clear_screen() using memset from string.h. Faster
clearing YEAH!
---
draw.c | 14 ++++++++++----
draw.h | 2 ++
2 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/draw.c b/draw.c
index 2fd89b4..b40c033 100644
--- a/draw.c
+++ b/draw.c
@@ -1,5 +1,6 @@
#include "draw.h"
#include <stdlib.h>
+#include <string.h>
#include "font.h"
extern uint8_t* screen_buffer;
@@ -23,17 +24,18 @@ void fill(uint8_t color)
{
switch(color) {
case c_BLACK:
- for (int i = 0; i < (hres_bytes*VRES); i++)
- screen_buffer[i] = 0;
+ clear_screen();
break;
case c_WHITE:
- for (int i = 0; i < (hres_bytes*VRES); i++)
- screen_buffer[i] = 0xFF;
+ memset( (void*)screen_buffer, 0xFF, hres_bytes*VRES );
break;
case c_INVERT:
for (int i = 0; i < (hres_bytes*VRES); i++)
screen_buffer[i] = ~screen_buffer[i];
break;
+ default:
+ memset( (void*)screen_buffer, color, hres_bytes*VRES );
+
}
}
@@ -242,3 +244,7 @@ void draw_string ( uint8_t pos_x, uint8_t pos_y, const char *text)
}
}
+void clear_screen( void )
+{
+ memset( (void*)screen_buffer, 0, hres_bytes*VRES );
+}
diff --git a/draw.h b/draw.h
index 1fbc3e8..a20cdb9 100644
--- a/draw.h
+++ b/draw.h
@@ -40,4 +40,6 @@ void pgm_draw_8bpp_bitmap( uint8_t pos_x, uint8_t pos_y, uint8_t width, uint8_t
void draw_char ( uint8_t pos_x, uint8_t pos_y, uint8_t ch);
void draw_string ( uint8_t pos_x, uint8_t pos_y, const char *text);
+void clear_screen( void );
+
#endif
--
2.39.2