Sam Shi / Adafruit_GFX_customizedfont

customized font enabled

Dependents:   unytefont

Fork of Adafruit_GFX by Neal Horman

Adafruit_GFX.cpp@17:5aab2bc95fa6, 2017-07-18 (annotated)

Committer:
SamShiSS
Date:
Tue Jul 18 14:54:19 2017 +0000
Revision:
17:5aab2bc95fa6
Parent:
14:edb3c36aa1a7 
changed from SPI connection to I2C connection

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nkhorman 0:c3dcd4c4983a 1 /***********************************
nkhorman 0:c3dcd4c4983a 2 This is a our graphics core library, for all our displays.
nkhorman 0:c3dcd4c4983a 3 We'll be adapting all the
nkhorman 0:c3dcd4c4983a 4 existing libaries to use this core to make updating, support
nkhorman 0:c3dcd4c4983a 5 and upgrading easier!
nkhorman 0:c3dcd4c4983a 6 Adafruit invests time and resources providing this open source code,
nkhorman 0:c3dcd4c4983a 7 please support Adafruit and open-source hardware by purchasing
nkhorman 0:c3dcd4c4983a 8 products from Adafruit!
nkhorman 0:c3dcd4c4983a 9 Written by Limor Fried/Ladyada for Adafruit Industries.
nkhorman 0:c3dcd4c4983a 10 BSD license, check license.txt for more information
nkhorman 0:c3dcd4c4983a 11 All text above must be included in any redistribution
nkhorman 0:c3dcd4c4983a 12 ****************************************/
nkhorman 0:c3dcd4c4983a 13
nkhorman 0:c3dcd4c4983a 14 /*
nkhorman 9:ddb97c9850a2 15 * Modified by Neal Horman 7/14/2012 for use in mbed
nkhorman 0:c3dcd4c4983a 16 */
nkhorman 0:c3dcd4c4983a 17
nkhorman 0:c3dcd4c4983a 18 #include "mbed.h"
nkhorman 0:c3dcd4c4983a 19
nkhorman 0:c3dcd4c4983a 20 #include "Adafruit_GFX.h"
nkhorman 0:c3dcd4c4983a 21 #include "glcdfont.h"
SamShiSS 17:5aab2bc95fa6 22 #include "unytefont4.h"
nkhorman 0:c3dcd4c4983a 23
nkhorman 9:ddb97c9850a2 24 #if defined(GFX_WANT_ABSTRACTS)
nkhorman 0:c3dcd4c4983a 25 // draw a circle outline
nkhorman 0:c3dcd4c4983a 26 void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
nkhorman 0:c3dcd4c4983a 27 {
nkhorman 0:c3dcd4c4983a 28 int16_t f = 1 - r;
nkhorman 0:c3dcd4c4983a 29 int16_t ddF_x = 1;
nkhorman 0:c3dcd4c4983a 30 int16_t ddF_y = -2 * r;
nkhorman 0:c3dcd4c4983a 31 int16_t x = 0;
nkhorman 0:c3dcd4c4983a 32 int16_t y = r;
nkhorman 0:c3dcd4c4983a 33
nkhorman 0:c3dcd4c4983a 34 drawPixel(x0, y0+r, color);
nkhorman 0:c3dcd4c4983a 35 drawPixel(x0, y0-r, color);
nkhorman 0:c3dcd4c4983a 36 drawPixel(x0+r, y0, color);
nkhorman 0:c3dcd4c4983a 37 drawPixel(x0-r, y0, color);
nkhorman 0:c3dcd4c4983a 38
nkhorman 0:c3dcd4c4983a 39 while (x<y)
nkhorman 0:c3dcd4c4983a 40 {
nkhorman 0:c3dcd4c4983a 41 if (f >= 0)
nkhorman 0:c3dcd4c4983a 42 {
nkhorman 0:c3dcd4c4983a 43 y--;
nkhorman 0:c3dcd4c4983a 44 ddF_y += 2;
nkhorman 0:c3dcd4c4983a 45 f += ddF_y;
nkhorman 0:c3dcd4c4983a 46 }
nkhorman 0:c3dcd4c4983a 47 x++;
nkhorman 0:c3dcd4c4983a 48 ddF_x += 2;
nkhorman 0:c3dcd4c4983a 49 f += ddF_x;
nkhorman 0:c3dcd4c4983a 50
nkhorman 0:c3dcd4c4983a 51 drawPixel(x0 + x, y0 + y, color);
nkhorman 0:c3dcd4c4983a 52 drawPixel(x0 - x, y0 + y, color);
nkhorman 0:c3dcd4c4983a 53 drawPixel(x0 + x, y0 - y, color);
nkhorman 0:c3dcd4c4983a 54 drawPixel(x0 - x, y0 - y, color);
nkhorman 0:c3dcd4c4983a 55 drawPixel(x0 + y, y0 + x, color);
nkhorman 0:c3dcd4c4983a 56 drawPixel(x0 - y, y0 + x, color);
nkhorman 0:c3dcd4c4983a 57 drawPixel(x0 + y, y0 - x, color);
nkhorman 0:c3dcd4c4983a 58 drawPixel(x0 - y, y0 - x, color);
nkhorman 0:c3dcd4c4983a 59 }
nkhorman 0:c3dcd4c4983a 60 }
nkhorman 0:c3dcd4c4983a 61
nkhorman 0:c3dcd4c4983a 62 void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color)
nkhorman 0:c3dcd4c4983a 63 {
nkhorman 0:c3dcd4c4983a 64 int16_t f = 1 - r;
nkhorman 0:c3dcd4c4983a 65 int16_t ddF_x = 1;
nkhorman 0:c3dcd4c4983a 66 int16_t ddF_y = -2 * r;
nkhorman 0:c3dcd4c4983a 67 int16_t x = 0;
nkhorman 0:c3dcd4c4983a 68 int16_t y = r;
nkhorman 0:c3dcd4c4983a 69
nkhorman 0:c3dcd4c4983a 70 while (x<y)
nkhorman 0:c3dcd4c4983a 71 {
nkhorman 0:c3dcd4c4983a 72 if (f >= 0)
nkhorman 0:c3dcd4c4983a 73 {
nkhorman 0:c3dcd4c4983a 74 y--;
nkhorman 0:c3dcd4c4983a 75 ddF_y += 2;
nkhorman 0:c3dcd4c4983a 76 f += ddF_y;
nkhorman 0:c3dcd4c4983a 77 }
nkhorman 0:c3dcd4c4983a 78 x++;
nkhorman 0:c3dcd4c4983a 79 ddF_x += 2;
nkhorman 0:c3dcd4c4983a 80 f += ddF_x;
nkhorman 0:c3dcd4c4983a 81
nkhorman 0:c3dcd4c4983a 82 if (cornername & 0x4)
nkhorman 0:c3dcd4c4983a 83 {
nkhorman 0:c3dcd4c4983a 84 drawPixel(x0 + x, y0 + y, color);
nkhorman 0:c3dcd4c4983a 85 drawPixel(x0 + y, y0 + x, color);
nkhorman 0:c3dcd4c4983a 86 }
nkhorman 0:c3dcd4c4983a 87
nkhorman 0:c3dcd4c4983a 88 if (cornername & 0x2)
nkhorman 0:c3dcd4c4983a 89 {
nkhorman 0:c3dcd4c4983a 90 drawPixel(x0 + x, y0 - y, color);
nkhorman 0:c3dcd4c4983a 91 drawPixel(x0 + y, y0 - x, color);
nkhorman 0:c3dcd4c4983a 92 }
nkhorman 0:c3dcd4c4983a 93
nkhorman 0:c3dcd4c4983a 94 if (cornername & 0x8)
nkhorman 0:c3dcd4c4983a 95 {
nkhorman 0:c3dcd4c4983a 96 drawPixel(x0 - y, y0 + x, color);
nkhorman 0:c3dcd4c4983a 97 drawPixel(x0 - x, y0 + y, color);
nkhorman 0:c3dcd4c4983a 98 }
nkhorman 0:c3dcd4c4983a 99
nkhorman 0:c3dcd4c4983a 100 if (cornername & 0x1)
nkhorman 0:c3dcd4c4983a 101 {
nkhorman 0:c3dcd4c4983a 102 drawPixel(x0 - y, y0 - x, color);
nkhorman 0:c3dcd4c4983a 103 drawPixel(x0 - x, y0 - y, color);
nkhorman 0:c3dcd4c4983a 104 }
nkhorman 0:c3dcd4c4983a 105 }
nkhorman 0:c3dcd4c4983a 106 }
nkhorman 0:c3dcd4c4983a 107
nkhorman 0:c3dcd4c4983a 108 void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
nkhorman 0:c3dcd4c4983a 109 {
nkhorman 0:c3dcd4c4983a 110 drawFastVLine(x0, y0-r, 2*r+1, color);
nkhorman 0:c3dcd4c4983a 111 fillCircleHelper(x0, y0, r, 3, 0, color);
nkhorman 0:c3dcd4c4983a 112 }
nkhorman 0:c3dcd4c4983a 113
nkhorman 0:c3dcd4c4983a 114 // used to do circles and roundrects!
nkhorman 0:c3dcd4c4983a 115 void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color)
nkhorman 0:c3dcd4c4983a 116 {
nkhorman 0:c3dcd4c4983a 117 int16_t f = 1 - r;
nkhorman 0:c3dcd4c4983a 118 int16_t ddF_x = 1;
nkhorman 0:c3dcd4c4983a 119 int16_t ddF_y = -2 * r;
nkhorman 0:c3dcd4c4983a 120 int16_t x = 0;
nkhorman 0:c3dcd4c4983a 121 int16_t y = r;
nkhorman 0:c3dcd4c4983a 122
nkhorman 0:c3dcd4c4983a 123 while (x<y)
nkhorman 0:c3dcd4c4983a 124 {
nkhorman 0:c3dcd4c4983a 125 if (f >= 0)
nkhorman 0:c3dcd4c4983a 126 {
nkhorman 0:c3dcd4c4983a 127 y--;
nkhorman 0:c3dcd4c4983a 128 ddF_y += 2;
nkhorman 0:c3dcd4c4983a 129 f += ddF_y;
nkhorman 0:c3dcd4c4983a 130 }
nkhorman 0:c3dcd4c4983a 131 x++;
nkhorman 0:c3dcd4c4983a 132 ddF_x += 2;
nkhorman 0:c3dcd4c4983a 133 f += ddF_x;
nkhorman 0:c3dcd4c4983a 134
nkhorman 0:c3dcd4c4983a 135 if (cornername & 0x1)
nkhorman 0:c3dcd4c4983a 136 {
nkhorman 0:c3dcd4c4983a 137 drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
nkhorman 0:c3dcd4c4983a 138 drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
nkhorman 0:c3dcd4c4983a 139 }
nkhorman 0:c3dcd4c4983a 140
nkhorman 0:c3dcd4c4983a 141 if (cornername & 0x2)
nkhorman 0:c3dcd4c4983a 142 {
nkhorman 0:c3dcd4c4983a 143 drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
nkhorman 0:c3dcd4c4983a 144 drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
nkhorman 0:c3dcd4c4983a 145 }
nkhorman 0:c3dcd4c4983a 146 }
nkhorman 0:c3dcd4c4983a 147 }
nkhorman 9:ddb97c9850a2 148 #endif
nkhorman 0:c3dcd4c4983a 149
nkhorman 9:ddb97c9850a2 150 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
nkhorman 0:c3dcd4c4983a 151 // bresenham's algorithm - thx wikpedia
nkhorman 0:c3dcd4c4983a 152 void Adafruit_GFX::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
nkhorman 0:c3dcd4c4983a 153 {
nkhorman 0:c3dcd4c4983a 154 int16_t steep = abs(y1 - y0) > abs(x1 - x0);
nkhorman 0:c3dcd4c4983a 155
nkhorman 0:c3dcd4c4983a 156 if (steep)
nkhorman 0:c3dcd4c4983a 157 {
nkhorman 0:c3dcd4c4983a 158 swap(x0, y0);
nkhorman 0:c3dcd4c4983a 159 swap(x1, y1);
nkhorman 0:c3dcd4c4983a 160 }
nkhorman 0:c3dcd4c4983a 161
nkhorman 0:c3dcd4c4983a 162 if (x0 > x1)
nkhorman 0:c3dcd4c4983a 163 {
nkhorman 0:c3dcd4c4983a 164 swap(x0, x1);
nkhorman 0:c3dcd4c4983a 165 swap(y0, y1);
nkhorman 0:c3dcd4c4983a 166 }
nkhorman 0:c3dcd4c4983a 167
nkhorman 0:c3dcd4c4983a 168 int16_t dx, dy;
nkhorman 0:c3dcd4c4983a 169 dx = x1 - x0;
nkhorman 0:c3dcd4c4983a 170 dy = abs(y1 - y0);
nkhorman 0:c3dcd4c4983a 171
nkhorman 0:c3dcd4c4983a 172 int16_t err = dx / 2;
nkhorman 0:c3dcd4c4983a 173 int16_t ystep;
nkhorman 0:c3dcd4c4983a 174
nkhorman 0:c3dcd4c4983a 175 if (y0 < y1)
nkhorman 0:c3dcd4c4983a 176 ystep = 1;
nkhorman 0:c3dcd4c4983a 177 else
nkhorman 0:c3dcd4c4983a 178 ystep = -1;
nkhorman 0:c3dcd4c4983a 179
nkhorman 0:c3dcd4c4983a 180 for (; x0<=x1; x0++)
nkhorman 0:c3dcd4c4983a 181 {
nkhorman 0:c3dcd4c4983a 182 if (steep)
nkhorman 0:c3dcd4c4983a 183 drawPixel(y0, x0, color);
nkhorman 0:c3dcd4c4983a 184 else
nkhorman 0:c3dcd4c4983a 185 drawPixel(x0, y0, color);
nkhorman 0:c3dcd4c4983a 186
nkhorman 0:c3dcd4c4983a 187 err -= dy;
nkhorman 0:c3dcd4c4983a 188 if (err < 0)
nkhorman 0:c3dcd4c4983a 189 {
nkhorman 0:c3dcd4c4983a 190 y0 += ystep;
nkhorman 0:c3dcd4c4983a 191 err += dx;
nkhorman 0:c3dcd4c4983a 192 }
nkhorman 0:c3dcd4c4983a 193 }
nkhorman 0:c3dcd4c4983a 194 }
nkhorman 0:c3dcd4c4983a 195
nkhorman 9:ddb97c9850a2 196 void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
nkhorman 9:ddb97c9850a2 197 {
nkhorman 9:ddb97c9850a2 198 // stupidest version - update in subclasses if desired!
nkhorman 9:ddb97c9850a2 199 drawLine(x, y, x, y+h-1, color);
nkhorman 9:ddb97c9850a2 200 }
nkhorman 0:c3dcd4c4983a 201
nkhorman 9:ddb97c9850a2 202 void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
nkhorman 9:ddb97c9850a2 203 {
nkhorman 9:ddb97c9850a2 204 // stupidest version - update in subclasses if desired!
nkhorman 9:ddb97c9850a2 205 for (int16_t i=x; i<x+w; i++)
nkhorman 9:ddb97c9850a2 206 drawFastVLine(i, y, h, color);
nkhorman 9:ddb97c9850a2 207 }
nkhorman 9:ddb97c9850a2 208 #endif
nkhorman 9:ddb97c9850a2 209
nkhorman 9:ddb97c9850a2 210 #if defined(GFX_WANT_ABSTRACTS)
nkhorman 0:c3dcd4c4983a 211 // draw a rectangle
nkhorman 0:c3dcd4c4983a 212 void Adafruit_GFX::drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
nkhorman 0:c3dcd4c4983a 213 {
nkhorman 0:c3dcd4c4983a 214 drawFastHLine(x, y, w, color);
nkhorman 0:c3dcd4c4983a 215 drawFastHLine(x, y+h-1, w, color);
nkhorman 0:c3dcd4c4983a 216 drawFastVLine(x, y, h, color);
nkhorman 0:c3dcd4c4983a 217 drawFastVLine(x+w-1, y, h, color);
nkhorman 0:c3dcd4c4983a 218 }
nkhorman 0:c3dcd4c4983a 219
nkhorman 0:c3dcd4c4983a 220 void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
nkhorman 0:c3dcd4c4983a 221 {
nkhorman 0:c3dcd4c4983a 222 // stupidest version - update in subclasses if desired!
nkhorman 0:c3dcd4c4983a 223 drawLine(x, y, x+w-1, y, color);
nkhorman 0:c3dcd4c4983a 224 }
nkhorman 0:c3dcd4c4983a 225
nkhorman 0:c3dcd4c4983a 226 void Adafruit_GFX::fillScreen(uint16_t color)
nkhorman 0:c3dcd4c4983a 227 {
nkhorman 0:c3dcd4c4983a 228 fillRect(0, 0, _width, _height, color);
nkhorman 0:c3dcd4c4983a 229 }
nkhorman 0:c3dcd4c4983a 230
nkhorman 0:c3dcd4c4983a 231 // draw a rounded rectangle!
nkhorman 0:c3dcd4c4983a 232 void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
nkhorman 0:c3dcd4c4983a 233 {
nkhorman 0:c3dcd4c4983a 234 // smarter version
nkhorman 0:c3dcd4c4983a 235 drawFastHLine(x+r , y , w-2*r, color); // Top
nkhorman 0:c3dcd4c4983a 236 drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
nkhorman 0:c3dcd4c4983a 237 drawFastVLine( x , y+r , h-2*r, color); // Left
nkhorman 0:c3dcd4c4983a 238 drawFastVLine( x+w-1, y+r , h-2*r, color); // Right
nkhorman 0:c3dcd4c4983a 239 // draw four corners
nkhorman 0:c3dcd4c4983a 240 drawCircleHelper(x+r , y+r , r, 1, color);
nkhorman 0:c3dcd4c4983a 241 drawCircleHelper(x+w-r-1, y+r , r, 2, color);
nkhorman 0:c3dcd4c4983a 242 drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
nkhorman 0:c3dcd4c4983a 243 drawCircleHelper(x+r , y+h-r-1, r, 8, color);
nkhorman 0:c3dcd4c4983a 244 }
nkhorman 0:c3dcd4c4983a 245
nkhorman 0:c3dcd4c4983a 246 // fill a rounded rectangle!
nkhorman 0:c3dcd4c4983a 247 void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
nkhorman 0:c3dcd4c4983a 248 {
nkhorman 0:c3dcd4c4983a 249 // smarter version
nkhorman 0:c3dcd4c4983a 250 fillRect(x+r, y, w-2*r, h, color);
nkhorman 0:c3dcd4c4983a 251
nkhorman 0:c3dcd4c4983a 252 // draw four corners
nkhorman 0:c3dcd4c4983a 253 fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
nkhorman 0:c3dcd4c4983a 254 fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
nkhorman 0:c3dcd4c4983a 255 }
nkhorman 0:c3dcd4c4983a 256
nkhorman 0:c3dcd4c4983a 257 // draw a triangle!
nkhorman 0:c3dcd4c4983a 258 void Adafruit_GFX::drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
nkhorman 0:c3dcd4c4983a 259 {
nkhorman 0:c3dcd4c4983a 260 drawLine(x0, y0, x1, y1, color);
nkhorman 0:c3dcd4c4983a 261 drawLine(x1, y1, x2, y2, color);
nkhorman 0:c3dcd4c4983a 262 drawLine(x2, y2, x0, y0, color);
nkhorman 0:c3dcd4c4983a 263 }
nkhorman 0:c3dcd4c4983a 264
nkhorman 0:c3dcd4c4983a 265 // fill a triangle!
nkhorman 0:c3dcd4c4983a 266 void Adafruit_GFX::fillTriangle ( int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color)
nkhorman 0:c3dcd4c4983a 267 {
nkhorman 0:c3dcd4c4983a 268 int16_t a, b, y, last;
nkhorman 0:c3dcd4c4983a 269
nkhorman 0:c3dcd4c4983a 270 // Sort coordinates by Y order (y2 >= y1 >= y0)
nkhorman 0:c3dcd4c4983a 271 if (y0 > y1)
nkhorman 0:c3dcd4c4983a 272 swap(y0, y1); swap(x0, x1);
nkhorman 0:c3dcd4c4983a 273
nkhorman 0:c3dcd4c4983a 274 if (y1 > y2)
nkhorman 0:c3dcd4c4983a 275 swap(y2, y1); swap(x2, x1);
nkhorman 0:c3dcd4c4983a 276
nkhorman 0:c3dcd4c4983a 277 if (y0 > y1)
nkhorman 0:c3dcd4c4983a 278 swap(y0, y1); swap(x0, x1);
nkhorman 0:c3dcd4c4983a 279
nkhorman 0:c3dcd4c4983a 280
nkhorman 0:c3dcd4c4983a 281 if(y0 == y2)
nkhorman 0:c3dcd4c4983a 282 { // Handle awkward all-on-same-line case as its own thing
nkhorman 0:c3dcd4c4983a 283 a = b = x0;
nkhorman 0:c3dcd4c4983a 284 if(x1 < a)
nkhorman 0:c3dcd4c4983a 285 a = x1;
nkhorman 0:c3dcd4c4983a 286 else if(x1 > b)
nkhorman 0:c3dcd4c4983a 287 b = x1;
nkhorman 0:c3dcd4c4983a 288
nkhorman 0:c3dcd4c4983a 289 if(x2 < a)
nkhorman 0:c3dcd4c4983a 290 a = x2;
nkhorman 0:c3dcd4c4983a 291 else if(x2 > b) b = x2;
nkhorman 0:c3dcd4c4983a 292 drawFastHLine(a, y0, b-a+1, color);
nkhorman 0:c3dcd4c4983a 293 return;
nkhorman 0:c3dcd4c4983a 294 }
nkhorman 0:c3dcd4c4983a 295
nkhorman 0:c3dcd4c4983a 296 int16_t
nkhorman 0:c3dcd4c4983a 297 dx01 = x1 - x0,
nkhorman 0:c3dcd4c4983a 298 dy01 = y1 - y0,
nkhorman 0:c3dcd4c4983a 299 dx02 = x2 - x0,
nkhorman 0:c3dcd4c4983a 300 dy02 = y2 - y0,
nkhorman 0:c3dcd4c4983a 301 dx12 = x2 - x1,
nkhorman 0:c3dcd4c4983a 302 dy12 = y2 - y1,
nkhorman 0:c3dcd4c4983a 303 sa = 0,
nkhorman 0:c3dcd4c4983a 304 sb = 0;
nkhorman 0:c3dcd4c4983a 305
nkhorman 0:c3dcd4c4983a 306 // For upper part of triangle, find scanline crossings for segments
nkhorman 0:c3dcd4c4983a 307 // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
nkhorman 0:c3dcd4c4983a 308 // is included here (and second loop will be skipped, avoiding a /0
nkhorman 0:c3dcd4c4983a 309 // error there), otherwise scanline y1 is skipped here and handled
nkhorman 0:c3dcd4c4983a 310 // in the second loop...which also avoids a /0 error here if y0=y1
nkhorman 0:c3dcd4c4983a 311 // (flat-topped triangle).
nkhorman 0:c3dcd4c4983a 312 if(y1 == y2)
nkhorman 0:c3dcd4c4983a 313 last = y1; // Include y1 scanline
nkhorman 0:c3dcd4c4983a 314 else
nkhorman 0:c3dcd4c4983a 315 last = y1-1; // Skip it
nkhorman 0:c3dcd4c4983a 316
nkhorman 0:c3dcd4c4983a 317 for(y=y0; y<=last; y++)
nkhorman 0:c3dcd4c4983a 318 {
nkhorman 0:c3dcd4c4983a 319 a = x0 + sa / dy01;
nkhorman 0:c3dcd4c4983a 320 b = x0 + sb / dy02;
nkhorman 0:c3dcd4c4983a 321 sa += dx01;
nkhorman 0:c3dcd4c4983a 322 sb += dx02;
nkhorman 0:c3dcd4c4983a 323 /* longhand:
nkhorman 0:c3dcd4c4983a 324 a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
nkhorman 0:c3dcd4c4983a 325 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
nkhorman 0:c3dcd4c4983a 326 */
nkhorman 0:c3dcd4c4983a 327 if(a > b)
nkhorman 0:c3dcd4c4983a 328 swap(a,b);
nkhorman 0:c3dcd4c4983a 329 drawFastHLine(a, y, b-a+1, color);
nkhorman 0:c3dcd4c4983a 330 }
nkhorman 0:c3dcd4c4983a 331
nkhorman 0:c3dcd4c4983a 332 // For lower part of triangle, find scanline crossings for segments
nkhorman 0:c3dcd4c4983a 333 // 0-2 and 1-2. This loop is skipped if y1=y2.
nkhorman 0:c3dcd4c4983a 334 sa = dx12 * (y - y1);
nkhorman 0:c3dcd4c4983a 335 sb = dx02 * (y - y0);
nkhorman 0:c3dcd4c4983a 336 for(; y<=y2; y++)
nkhorman 0:c3dcd4c4983a 337 {
nkhorman 0:c3dcd4c4983a 338 a = x1 + sa / dy12;
nkhorman 0:c3dcd4c4983a 339 b = x0 + sb / dy02;
nkhorman 0:c3dcd4c4983a 340 sa += dx12;
nkhorman 0:c3dcd4c4983a 341 sb += dx02;
nkhorman 0:c3dcd4c4983a 342 /* longhand:
nkhorman 0:c3dcd4c4983a 343 a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
nkhorman 0:c3dcd4c4983a 344 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
nkhorman 0:c3dcd4c4983a 345 */
nkhorman 0:c3dcd4c4983a 346 if(a > b)
nkhorman 0:c3dcd4c4983a 347 swap(a,b);
nkhorman 0:c3dcd4c4983a 348 drawFastHLine(a, y, b-a+1, color);
nkhorman 0:c3dcd4c4983a 349 }
nkhorman 0:c3dcd4c4983a 350 }
nkhorman 0:c3dcd4c4983a 351
nkhorman 0:c3dcd4c4983a 352 void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color)
nkhorman 0:c3dcd4c4983a 353 {
nkhorman 0:c3dcd4c4983a 354 for (int16_t j=0; j<h; j++)
nkhorman 0:c3dcd4c4983a 355 {
nkhorman 0:c3dcd4c4983a 356 for (int16_t i=0; i<w; i++ )
nkhorman 0:c3dcd4c4983a 357 {
nkhorman 0:c3dcd4c4983a 358 if (bitmap[i + (j/8)*w] & _BV(j%8))
nkhorman 0:c3dcd4c4983a 359 drawPixel(x+i, y+j, color);
nkhorman 0:c3dcd4c4983a 360 }
nkhorman 0:c3dcd4c4983a 361 }
nkhorman 0:c3dcd4c4983a 362 }
nkhorman 14:edb3c36aa1a7 363 #endif
nkhorman 0:c3dcd4c4983a 364
nkhorman 0:c3dcd4c4983a 365 size_t Adafruit_GFX::writeChar(uint8_t c)
nkhorman 0:c3dcd4c4983a 366 {
nkhorman 0:c3dcd4c4983a 367 if (c == '\n')
nkhorman 0:c3dcd4c4983a 368 {
nkhorman 0:c3dcd4c4983a 369 cursor_y += textsize*8;
nkhorman 0:c3dcd4c4983a 370 cursor_x = 0;
nkhorman 0:c3dcd4c4983a 371 }
nkhorman 0:c3dcd4c4983a 372 else if (c == '\r')
nkhorman 0:c3dcd4c4983a 373 cursor_x = 0;
nkhorman 0:c3dcd4c4983a 374 else
nkhorman 0:c3dcd4c4983a 375 {
nkhorman 0:c3dcd4c4983a 376 drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
nkhorman 0:c3dcd4c4983a 377 cursor_x += textsize*6;
nkhorman 0:c3dcd4c4983a 378 if (wrap && (cursor_x > (_width - textsize*6)))
nkhorman 0:c3dcd4c4983a 379 {
nkhorman 0:c3dcd4c4983a 380 cursor_y += textsize*8;
nkhorman 0:c3dcd4c4983a 381 cursor_x = 0;
nkhorman 0:c3dcd4c4983a 382 }
nkhorman 0:c3dcd4c4983a 383 }
nkhorman 0:c3dcd4c4983a 384 return 1;
nkhorman 0:c3dcd4c4983a 385 }
nkhorman 0:c3dcd4c4983a 386
nkhorman 0:c3dcd4c4983a 387 // draw a character
nkhorman 0:c3dcd4c4983a 388 void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
nkhorman 0:c3dcd4c4983a 389 {
SamShiSS 17:5aab2bc95fa6 390 //This function is customized for char array created using MikroElextronika GLCD font creator
SamShiSS 17:5aab2bc95fa6 391 c=c-32; //starting character #32 (space)
SamShiSS 17:5aab2bc95fa6 392 int xshift, yshift, width=10, height=16;
SamShiSS 17:5aab2bc95fa6 393
nkhorman 0:c3dcd4c4983a 394 if(
nkhorman 0:c3dcd4c4983a 395 (x >= _width) || // Clip right
nkhorman 0:c3dcd4c4983a 396 (y >= _height) || // Clip bottom
SamShiSS 17:5aab2bc95fa6 397 ((x + width * size - 1) < 0) || // Clip left
SamShiSS 17:5aab2bc95fa6 398 ((y + height * size - 1) < 0) // Clip top
nkhorman 0:c3dcd4c4983a 399 )
nkhorman 0:c3dcd4c4983a 400 return;
nkhorman 0:c3dcd4c4983a 401
SamShiSS 17:5aab2bc95fa6 402 for (int8_t i=0; i<(height+7)/8*width; i++ )
SamShiSS 17:5aab2bc95fa6 403 {
SamShiSS 17:5aab2bc95fa6 404 //locating the corresponding character data
SamShiSS 17:5aab2bc95fa6 405 //then allocating each byte to each i value as a "line"
SamShiSS 17:5aab2bc95fa6 406
SamShiSS 17:5aab2bc95fa6 407 uint8_t line=0;
nkhorman 0:c3dcd4c4983a 408
SamShiSS 17:5aab2bc95fa6 409 if (i<width)
SamShiSS 17:5aab2bc95fa6 410 line = unytefont[c*((height+7)/8*width+1)+(height+7)/8*i+1];
SamShiSS 17:5aab2bc95fa6 411 else if (i<width*2)
SamShiSS 17:5aab2bc95fa6 412 line = unytefont[c*((height+7)/8*width+1)+(height+7)/8*(i-width)+2];
SamShiSS 17:5aab2bc95fa6 413 else if (i<width*3)
SamShiSS 17:5aab2bc95fa6 414 line = unytefont[c*((height+7)/8*width+1)+(height+7)/8*(i-width*2)+3];
SamShiSS 17:5aab2bc95fa6 415
SamShiSS 17:5aab2bc95fa6 416 //for each line, check for its pixels at all 8 bits position, then draw pixels at the appropriate (x,y) position
SamShiSS 17:5aab2bc95fa6 417
nkhorman 0:c3dcd4c4983a 418 for (int8_t j = 0; j<8; j++)
nkhorman 0:c3dcd4c4983a 419 {
SamShiSS 17:5aab2bc95fa6 420 xshift=i%width;
SamShiSS 17:5aab2bc95fa6 421 yshift=j+i/width*8;
SamShiSS 17:5aab2bc95fa6 422
nkhorman 0:c3dcd4c4983a 423 if (line & 0x1)
nkhorman 0:c3dcd4c4983a 424 {
nkhorman 9:ddb97c9850a2 425 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
nkhorman 0:c3dcd4c4983a 426 if (size == 1) // default size
SamShiSS 17:5aab2bc95fa6 427 drawPixel(x+xshift, y+yshift, color);
nkhorman 0:c3dcd4c4983a 428 else // big size
SamShiSS 17:5aab2bc95fa6 429 fillRect(x+(xshift*size), y+(yshift*size), size, size, color);
nkhorman 9:ddb97c9850a2 430 #else
SamShiSS 17:5aab2bc95fa6 431 drawPixel(x+xshift, y+yshift, color);
nkhorman 0:c3dcd4c4983a 432 #endif
nkhorman 0:c3dcd4c4983a 433 }
nkhorman 0:c3dcd4c4983a 434 else if (bg != color)
nkhorman 0:c3dcd4c4983a 435 {
nkhorman 9:ddb97c9850a2 436 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
nkhorman 0:c3dcd4c4983a 437 if (size == 1) // default size
nkhorman 0:c3dcd4c4983a 438 drawPixel(x+i, y+j, bg);
nkhorman 0:c3dcd4c4983a 439 else // big size
nkhorman 0:c3dcd4c4983a 440 fillRect(x+i*size, y+j*size, size, size, bg);
nkhorman 9:ddb97c9850a2 441 #else
nkhorman 9:ddb97c9850a2 442 drawPixel(x+i, y+j, bg);
nkhorman 0:c3dcd4c4983a 443 #endif
nkhorman 0:c3dcd4c4983a 444 }
nkhorman 0:c3dcd4c4983a 445 line >>= 1;
nkhorman 0:c3dcd4c4983a 446 }
nkhorman 0:c3dcd4c4983a 447 }
nkhorman 0:c3dcd4c4983a 448 }
nkhorman 9:ddb97c9850a2 449
nkhorman 0:c3dcd4c4983a 450 void Adafruit_GFX::setRotation(uint8_t x)
nkhorman 0:c3dcd4c4983a 451 {
nkhorman 0:c3dcd4c4983a 452 x %= 4; // cant be higher than 3
nkhorman 0:c3dcd4c4983a 453 rotation = x;
nkhorman 0:c3dcd4c4983a 454 switch (x)
nkhorman 0:c3dcd4c4983a 455 {
nkhorman 0:c3dcd4c4983a 456 case 0:
nkhorman 0:c3dcd4c4983a 457 case 2:
nkhorman 0:c3dcd4c4983a 458 _width = _rawWidth;
nkhorman 0:c3dcd4c4983a 459 _height = _rawHeight;
nkhorman 0:c3dcd4c4983a 460 break;
nkhorman 0:c3dcd4c4983a 461 case 1:
nkhorman 0:c3dcd4c4983a 462 case 3:
nkhorman 0:c3dcd4c4983a 463 _width = _rawHeight;
nkhorman 0:c3dcd4c4983a 464 _height = _rawWidth;
nkhorman 0:c3dcd4c4983a 465 break;
nkhorman 0:c3dcd4c4983a 466 }
SamShiSS 17:5aab2bc95fa6 467 }