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Dependencies:   mbed Blynk

u8glibARM/u8g_scale.c@0:d8f4c441e032, 2016-06-10 (annotated)

Committer:
lixianyu
Date:
Fri Jun 10 15:20:20 2016 +0000
Revision:
0:d8f4c441e032
u8glib???????????i2c???

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lixianyu 0:d8f4c441e032 1 /*
lixianyu 0:d8f4c441e032 2
lixianyu 0:d8f4c441e032 3 u8g_scale.c
lixianyu 0:d8f4c441e032 4
lixianyu 0:d8f4c441e032 5 Universal 8bit Graphics Library
lixianyu 0:d8f4c441e032 6
lixianyu 0:d8f4c441e032 7 Copyright (c) 2012, olikraus@gmail.com
lixianyu 0:d8f4c441e032 8 All rights reserved.
lixianyu 0:d8f4c441e032 9
lixianyu 0:d8f4c441e032 10 Redistribution and use in source and binary forms, with or without modification,
lixianyu 0:d8f4c441e032 11 are permitted provided that the following conditions are met:
lixianyu 0:d8f4c441e032 12
lixianyu 0:d8f4c441e032 13 * Redistributions of source code must retain the above copyright notice, this list
lixianyu 0:d8f4c441e032 14 of conditions and the following disclaimer.
lixianyu 0:d8f4c441e032 15
lixianyu 0:d8f4c441e032 16 * Redistributions in binary form must reproduce the above copyright notice, this
lixianyu 0:d8f4c441e032 17 list of conditions and the following disclaimer in the documentation and/or other
lixianyu 0:d8f4c441e032 18 materials provided with the distribution.
lixianyu 0:d8f4c441e032 19
lixianyu 0:d8f4c441e032 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
lixianyu 0:d8f4c441e032 21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
lixianyu 0:d8f4c441e032 22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
lixianyu 0:d8f4c441e032 23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lixianyu 0:d8f4c441e032 24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
lixianyu 0:d8f4c441e032 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
lixianyu 0:d8f4c441e032 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
lixianyu 0:d8f4c441e032 27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
lixianyu 0:d8f4c441e032 28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lixianyu 0:d8f4c441e032 29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
lixianyu 0:d8f4c441e032 30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
lixianyu 0:d8f4c441e032 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
lixianyu 0:d8f4c441e032 32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lixianyu 0:d8f4c441e032 33
lixianyu 0:d8f4c441e032 34 Scale screen by some constant factors. Usefull for making bigger fonts wiht less
lixianyu 0:d8f4c441e032 35 memory consumption
lixianyu 0:d8f4c441e032 36
lixianyu 0:d8f4c441e032 37 */
lixianyu 0:d8f4c441e032 38
lixianyu 0:d8f4c441e032 39 #include "u8g.h"
lixianyu 0:d8f4c441e032 40
lixianyu 0:d8f4c441e032 41 uint8_t u8g_dev_scale_2x2_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg);
lixianyu 0:d8f4c441e032 42
lixianyu 0:d8f4c441e032 43
lixianyu 0:d8f4c441e032 44 u8g_dev_t u8g_dev_scale = { u8g_dev_scale_2x2_fn, NULL, NULL };
lixianyu 0:d8f4c441e032 45
lixianyu 0:d8f4c441e032 46 void u8g_UndoScale(u8g_t *u8g)
lixianyu 0:d8f4c441e032 47 {
lixianyu 0:d8f4c441e032 48 if ( u8g->dev != &u8g_dev_scale )
lixianyu 0:d8f4c441e032 49 return;
lixianyu 0:d8f4c441e032 50 u8g->dev = u8g_dev_scale.dev_mem;
lixianyu 0:d8f4c441e032 51 u8g_UpdateDimension(u8g);
lixianyu 0:d8f4c441e032 52 }
lixianyu 0:d8f4c441e032 53
lixianyu 0:d8f4c441e032 54 void u8g_SetScale2x2(u8g_t *u8g)
lixianyu 0:d8f4c441e032 55 {
lixianyu 0:d8f4c441e032 56 if ( u8g->dev != &u8g_dev_scale )
lixianyu 0:d8f4c441e032 57 {
lixianyu 0:d8f4c441e032 58 u8g_dev_scale.dev_mem = u8g->dev;
lixianyu 0:d8f4c441e032 59 u8g->dev = &u8g_dev_scale;
lixianyu 0:d8f4c441e032 60 }
lixianyu 0:d8f4c441e032 61 u8g_dev_scale.dev_fn = u8g_dev_scale_2x2_fn;
lixianyu 0:d8f4c441e032 62 u8g_UpdateDimension(u8g);
lixianyu 0:d8f4c441e032 63 }
lixianyu 0:d8f4c441e032 64
lixianyu 0:d8f4c441e032 65
lixianyu 0:d8f4c441e032 66 uint8_t u8g_dev_scale_2x2_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
lixianyu 0:d8f4c441e032 67 {
lixianyu 0:d8f4c441e032 68 u8g_dev_t *chain = (u8g_dev_t *)(dev->dev_mem);
lixianyu 0:d8f4c441e032 69 uint8_t pixel;
lixianyu 0:d8f4c441e032 70 uint16_t scaled_pixel;
lixianyu 0:d8f4c441e032 71 uint8_t i;
lixianyu 0:d8f4c441e032 72 uint8_t dir;
lixianyu 0:d8f4c441e032 73 u8g_uint_t x, y, xx,yy;
lixianyu 0:d8f4c441e032 74
lixianyu 0:d8f4c441e032 75 switch(msg)
lixianyu 0:d8f4c441e032 76 {
lixianyu 0:d8f4c441e032 77 default:
lixianyu 0:d8f4c441e032 78 return u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 79 case U8G_DEV_MSG_GET_WIDTH:
lixianyu 0:d8f4c441e032 80 *((u8g_uint_t *)arg) = u8g_GetWidthLL(u8g, chain) / 2;
lixianyu 0:d8f4c441e032 81 break;
lixianyu 0:d8f4c441e032 82 case U8G_DEV_MSG_GET_HEIGHT:
lixianyu 0:d8f4c441e032 83 *((u8g_uint_t *)arg) = u8g_GetHeightLL(u8g, chain) / 2;
lixianyu 0:d8f4c441e032 84 break;
lixianyu 0:d8f4c441e032 85 case U8G_DEV_MSG_GET_PAGE_BOX:
lixianyu 0:d8f4c441e032 86 /* get page size from next device in the chain */
lixianyu 0:d8f4c441e032 87 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 88 ((u8g_box_t *)arg)->x0 /= 2;
lixianyu 0:d8f4c441e032 89 ((u8g_box_t *)arg)->x1 /= 2;
lixianyu 0:d8f4c441e032 90 ((u8g_box_t *)arg)->y0 /= 2;
lixianyu 0:d8f4c441e032 91 ((u8g_box_t *)arg)->y1 /= 2;
lixianyu 0:d8f4c441e032 92 return 1;
lixianyu 0:d8f4c441e032 93 case U8G_DEV_MSG_SET_PIXEL:
lixianyu 0:d8f4c441e032 94 x = ((u8g_dev_arg_pixel_t *)arg)->x;
lixianyu 0:d8f4c441e032 95 x *= 2;
lixianyu 0:d8f4c441e032 96 y = ((u8g_dev_arg_pixel_t *)arg)->y;
lixianyu 0:d8f4c441e032 97 y *= 2;
lixianyu 0:d8f4c441e032 98 ((u8g_dev_arg_pixel_t *)arg)->x = x;
lixianyu 0:d8f4c441e032 99 ((u8g_dev_arg_pixel_t *)arg)->y = y;
lixianyu 0:d8f4c441e032 100 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 101 x++;
lixianyu 0:d8f4c441e032 102 ((u8g_dev_arg_pixel_t *)arg)->x = x;
lixianyu 0:d8f4c441e032 103 ((u8g_dev_arg_pixel_t *)arg)->y = y;
lixianyu 0:d8f4c441e032 104 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 105 y++;
lixianyu 0:d8f4c441e032 106 ((u8g_dev_arg_pixel_t *)arg)->x = x;
lixianyu 0:d8f4c441e032 107 ((u8g_dev_arg_pixel_t *)arg)->y = y;
lixianyu 0:d8f4c441e032 108 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 109 x--;
lixianyu 0:d8f4c441e032 110 ((u8g_dev_arg_pixel_t *)arg)->x = x;
lixianyu 0:d8f4c441e032 111 ((u8g_dev_arg_pixel_t *)arg)->y = y;
lixianyu 0:d8f4c441e032 112 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 113 break;
lixianyu 0:d8f4c441e032 114 case U8G_DEV_MSG_SET_8PIXEL:
lixianyu 0:d8f4c441e032 115 pixel = ((u8g_dev_arg_pixel_t *)arg)->pixel;
lixianyu 0:d8f4c441e032 116 dir = ((u8g_dev_arg_pixel_t *)arg)->dir;
lixianyu 0:d8f4c441e032 117 scaled_pixel = 0;
lixianyu 0:d8f4c441e032 118 for( i = 0; i < 8; i++ )
lixianyu 0:d8f4c441e032 119 {
lixianyu 0:d8f4c441e032 120 scaled_pixel<<=2;
lixianyu 0:d8f4c441e032 121 if ( pixel & 128 )
lixianyu 0:d8f4c441e032 122 {
lixianyu 0:d8f4c441e032 123 scaled_pixel |= 3;
lixianyu 0:d8f4c441e032 124 }
lixianyu 0:d8f4c441e032 125 pixel<<=1;
lixianyu 0:d8f4c441e032 126 }
lixianyu 0:d8f4c441e032 127 x = ((u8g_dev_arg_pixel_t *)arg)->x;
lixianyu 0:d8f4c441e032 128 x *= 2;
lixianyu 0:d8f4c441e032 129 xx = x;
lixianyu 0:d8f4c441e032 130 y = ((u8g_dev_arg_pixel_t *)arg)->y;
lixianyu 0:d8f4c441e032 131 y *= 2;
lixianyu 0:d8f4c441e032 132 yy = y;
lixianyu 0:d8f4c441e032 133 if ( ((u8g_dev_arg_pixel_t *)arg)->dir & 1 )
lixianyu 0:d8f4c441e032 134 {
lixianyu 0:d8f4c441e032 135 xx++;
lixianyu 0:d8f4c441e032 136 }
lixianyu 0:d8f4c441e032 137 else
lixianyu 0:d8f4c441e032 138 {
lixianyu 0:d8f4c441e032 139 yy++;
lixianyu 0:d8f4c441e032 140 }
lixianyu 0:d8f4c441e032 141
lixianyu 0:d8f4c441e032 142 ((u8g_dev_arg_pixel_t *)arg)->pixel = scaled_pixel>>8;
lixianyu 0:d8f4c441e032 143 ((u8g_dev_arg_pixel_t *)arg)->x = x;
lixianyu 0:d8f4c441e032 144 ((u8g_dev_arg_pixel_t *)arg)->y = y;
lixianyu 0:d8f4c441e032 145 ((u8g_dev_arg_pixel_t *)arg)->dir = dir;
lixianyu 0:d8f4c441e032 146 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 147
lixianyu 0:d8f4c441e032 148
lixianyu 0:d8f4c441e032 149 ((u8g_dev_arg_pixel_t *)arg)->x = xx;
lixianyu 0:d8f4c441e032 150 ((u8g_dev_arg_pixel_t *)arg)->y = yy;
lixianyu 0:d8f4c441e032 151 ((u8g_dev_arg_pixel_t *)arg)->dir = dir;
lixianyu 0:d8f4c441e032 152 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 153
lixianyu 0:d8f4c441e032 154 ((u8g_dev_arg_pixel_t *)arg)->pixel = scaled_pixel&255;
lixianyu 0:d8f4c441e032 155 //((u8g_dev_arg_pixel_t *)arg)->pixel = 0x00;
lixianyu 0:d8f4c441e032 156 switch(dir)
lixianyu 0:d8f4c441e032 157 {
lixianyu 0:d8f4c441e032 158 case 0:
lixianyu 0:d8f4c441e032 159 x+=8;
lixianyu 0:d8f4c441e032 160 xx+=8;
lixianyu 0:d8f4c441e032 161 break;
lixianyu 0:d8f4c441e032 162 case 1:
lixianyu 0:d8f4c441e032 163 y+=8;
lixianyu 0:d8f4c441e032 164 yy+=8;
lixianyu 0:d8f4c441e032 165 break;
lixianyu 0:d8f4c441e032 166 case 2:
lixianyu 0:d8f4c441e032 167 x-=8;
lixianyu 0:d8f4c441e032 168 xx-=8;
lixianyu 0:d8f4c441e032 169 break;
lixianyu 0:d8f4c441e032 170 case 3:
lixianyu 0:d8f4c441e032 171 y-=8;
lixianyu 0:d8f4c441e032 172 yy-=8;
lixianyu 0:d8f4c441e032 173 break;
lixianyu 0:d8f4c441e032 174 }
lixianyu 0:d8f4c441e032 175 ((u8g_dev_arg_pixel_t *)arg)->x = x;
lixianyu 0:d8f4c441e032 176 ((u8g_dev_arg_pixel_t *)arg)->y = y;
lixianyu 0:d8f4c441e032 177 ((u8g_dev_arg_pixel_t *)arg)->dir = dir;
lixianyu 0:d8f4c441e032 178 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 179
lixianyu 0:d8f4c441e032 180 ((u8g_dev_arg_pixel_t *)arg)->x = xx;
lixianyu 0:d8f4c441e032 181 ((u8g_dev_arg_pixel_t *)arg)->y = yy;
lixianyu 0:d8f4c441e032 182 ((u8g_dev_arg_pixel_t *)arg)->dir = dir;
lixianyu 0:d8f4c441e032 183 u8g_call_dev_fn(u8g, chain, msg, arg);
lixianyu 0:d8f4c441e032 184 break;
lixianyu 0:d8f4c441e032 185 }
lixianyu 0:d8f4c441e032 186 return 1;
lixianyu 0:d8f4c441e032 187 }
lixianyu 0:d8f4c441e032 188
lixianyu 0:d8f4c441e032 189