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Diff: u8glibARM/u8g_line.c
- Revision:
- 2:6cd3b0947188
- Parent:
- 1:0e75de2a5d21
- Child:
- 3:4cd9171ba989
--- a/u8glibARM/u8g_line.c Mon Jun 13 02:21:11 2016 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,91 +0,0 @@
-/*
-
- u8g_line.c
-
- Universal 8bit Graphics Library
-
- Copyright (c) 2012, olikraus@gmail.com
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice, this list
- of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright notice, this
- list of conditions and the following disclaimer in the documentation and/or other
- materials provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-*/
-
-#include "u8g.h"
-
-void u8g_DrawLine(u8g_t *u8g, u8g_uint_t x1, u8g_uint_t y1, u8g_uint_t x2, u8g_uint_t y2)
-{
- u8g_uint_t tmp;
- u8g_uint_t x,y;
- u8g_uint_t dx, dy;
- u8g_int_t err;
- u8g_int_t ystep;
-
- uint8_t swapxy = 0;
-
- /* no BBX intersection check at the moment, should be added... */
-
- if ( x1 > x2 ) dx = x1-x2; else dx = x2-x1;
- if ( y1 > y2 ) dy = y1-y2; else dy = y2-y1;
-
- if ( dy > dx )
- {
- swapxy = 1;
- tmp = dx; dx =dy; dy = tmp;
- tmp = x1; x1 =y1; y1 = tmp;
- tmp = x2; x2 =y2; y2 = tmp;
- }
- if ( x1 > x2 )
- {
- tmp = x1; x1 =x2; x2 = tmp;
- tmp = y1; y1 =y2; y2 = tmp;
- }
- err = dx >> 1;
- if ( y2 > y1 ) ystep = 1; else ystep = -1;
- y = y1;
-
-#ifndef U8G_16BIT
- if ( x2 == 255 )
- x2--;
-#else
- if ( x2 == 0xffff )
- x2--;
-#endif
-
- for( x = x1; x <= x2; x++ )
- {
- if ( swapxy == 0 )
- u8g_DrawPixel(u8g, x, y);
- else
- u8g_DrawPixel(u8g, y, x);
- err -= (uint8_t)dy;
- if ( err < 0 )
- {
- y += (u8g_uint_t)ystep;
- err += (u8g_uint_t)dx;
- }
- }
-}
-