Daniel Levine / Adafruit_IS31FL3731

Port of the Adafruit_IS31FL3731 library for Arduino. Enables control of the feather Charliewing LED Matrix peripheral board. Makes use of the I2Cdev library for I2C.

Dependencies:   I2Cdev_MAX32630FTHR

Defaulty uses pinmap for the Maxim 32630FTHR Pegasus board. For a different board, change pin definitions in I2Cdev.h

Adafruit_GFX.cpp@3:0da61b470b86, 2018-03-17 (annotated)

Committer:
DVLevine
Date:
Sat Mar 17 23:15:19 2018 +0000
Revision:
3:0da61b470b86
Parent:
0:9a73d45a17de 
Cleaned up comments a bit. Removed old commend out code from arduino port.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DVLevine 0:9a73d45a17de 1 /***********************************
DVLevine 0:9a73d45a17de 2 This is a our graphics core library, for all our displays.
DVLevine 0:9a73d45a17de 3 We'll be adapting all the
DVLevine 0:9a73d45a17de 4 existing libaries to use this core to make updating, support
DVLevine 0:9a73d45a17de 5 and upgrading easier!
DVLevine 0:9a73d45a17de 6
DVLevine 0:9a73d45a17de 7 Adafruit invests time and resources providing this open source code,
DVLevine 0:9a73d45a17de 8 please support Adafruit and open-source hardware by purchasing
DVLevine 0:9a73d45a17de 9 products from Adafruit!
DVLevine 0:9a73d45a17de 10
DVLevine 0:9a73d45a17de 11 Written by Limor Fried/Ladyada for Adafruit Industries.
DVLevine 0:9a73d45a17de 12 BSD license, check license.txt for more information
DVLevine 0:9a73d45a17de 13 All text above must be included in any redistribution
DVLevine 0:9a73d45a17de 14 ****************************************/
DVLevine 0:9a73d45a17de 15
DVLevine 0:9a73d45a17de 16 /*
DVLevine 0:9a73d45a17de 17 * Modified by Neal Horman 7/14/2012 for use in mbed
DVLevine 0:9a73d45a17de 18 */
DVLevine 0:9a73d45a17de 19
DVLevine 0:9a73d45a17de 20 #include "mbed.h"
DVLevine 0:9a73d45a17de 21
DVLevine 0:9a73d45a17de 22 #include "Adafruit_GFX.h"
DVLevine 0:9a73d45a17de 23 #include "glcdfont.h"
DVLevine 0:9a73d45a17de 24
DVLevine 0:9a73d45a17de 25 #if defined(GFX_WANT_ABSTRACTS)
DVLevine 0:9a73d45a17de 26 // draw a circle outline
DVLevine 0:9a73d45a17de 27 void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
DVLevine 0:9a73d45a17de 28 {
DVLevine 0:9a73d45a17de 29 int16_t f = 1 - r;
DVLevine 0:9a73d45a17de 30 int16_t ddF_x = 1;
DVLevine 0:9a73d45a17de 31 int16_t ddF_y = -2 * r;
DVLevine 0:9a73d45a17de 32 int16_t x = 0;
DVLevine 0:9a73d45a17de 33 int16_t y = r;
DVLevine 0:9a73d45a17de 34
DVLevine 0:9a73d45a17de 35 drawPixel(x0, y0+r, color);
DVLevine 0:9a73d45a17de 36 drawPixel(x0, y0-r, color);
DVLevine 0:9a73d45a17de 37 drawPixel(x0+r, y0, color);
DVLevine 0:9a73d45a17de 38 drawPixel(x0-r, y0, color);
DVLevine 0:9a73d45a17de 39
DVLevine 0:9a73d45a17de 40 while (x<y)
DVLevine 0:9a73d45a17de 41 {
DVLevine 0:9a73d45a17de 42 if (f >= 0)
DVLevine 0:9a73d45a17de 43 {
DVLevine 0:9a73d45a17de 44 y--;
DVLevine 0:9a73d45a17de 45 ddF_y += 2;
DVLevine 0:9a73d45a17de 46 f += ddF_y;
DVLevine 0:9a73d45a17de 47 }
DVLevine 0:9a73d45a17de 48 x++;
DVLevine 0:9a73d45a17de 49 ddF_x += 2;
DVLevine 0:9a73d45a17de 50 f += ddF_x;
DVLevine 0:9a73d45a17de 51
DVLevine 0:9a73d45a17de 52 drawPixel(x0 + x, y0 + y, color);
DVLevine 0:9a73d45a17de 53 drawPixel(x0 - x, y0 + y, color);
DVLevine 0:9a73d45a17de 54 drawPixel(x0 + x, y0 - y, color);
DVLevine 0:9a73d45a17de 55 drawPixel(x0 - x, y0 - y, color);
DVLevine 0:9a73d45a17de 56 drawPixel(x0 + y, y0 + x, color);
DVLevine 0:9a73d45a17de 57 drawPixel(x0 - y, y0 + x, color);
DVLevine 0:9a73d45a17de 58 drawPixel(x0 + y, y0 - x, color);
DVLevine 0:9a73d45a17de 59 drawPixel(x0 - y, y0 - x, color);
DVLevine 0:9a73d45a17de 60 }
DVLevine 0:9a73d45a17de 61 }
DVLevine 0:9a73d45a17de 62
DVLevine 0:9a73d45a17de 63 void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color)
DVLevine 0:9a73d45a17de 64 {
DVLevine 0:9a73d45a17de 65 int16_t f = 1 - r;
DVLevine 0:9a73d45a17de 66 int16_t ddF_x = 1;
DVLevine 0:9a73d45a17de 67 int16_t ddF_y = -2 * r;
DVLevine 0:9a73d45a17de 68 int16_t x = 0;
DVLevine 0:9a73d45a17de 69 int16_t y = r;
DVLevine 0:9a73d45a17de 70
DVLevine 0:9a73d45a17de 71 while (x<y)
DVLevine 0:9a73d45a17de 72 {
DVLevine 0:9a73d45a17de 73 if (f >= 0)
DVLevine 0:9a73d45a17de 74 {
DVLevine 0:9a73d45a17de 75 y--;
DVLevine 0:9a73d45a17de 76 ddF_y += 2;
DVLevine 0:9a73d45a17de 77 f += ddF_y;
DVLevine 0:9a73d45a17de 78 }
DVLevine 0:9a73d45a17de 79 x++;
DVLevine 0:9a73d45a17de 80 ddF_x += 2;
DVLevine 0:9a73d45a17de 81 f += ddF_x;
DVLevine 0:9a73d45a17de 82
DVLevine 0:9a73d45a17de 83 if (cornername & 0x4)
DVLevine 0:9a73d45a17de 84 {
DVLevine 0:9a73d45a17de 85 drawPixel(x0 + x, y0 + y, color);
DVLevine 0:9a73d45a17de 86 drawPixel(x0 + y, y0 + x, color);
DVLevine 0:9a73d45a17de 87 }
DVLevine 0:9a73d45a17de 88
DVLevine 0:9a73d45a17de 89 if (cornername & 0x2)
DVLevine 0:9a73d45a17de 90 {
DVLevine 0:9a73d45a17de 91 drawPixel(x0 + x, y0 - y, color);
DVLevine 0:9a73d45a17de 92 drawPixel(x0 + y, y0 - x, color);
DVLevine 0:9a73d45a17de 93 }
DVLevine 0:9a73d45a17de 94
DVLevine 0:9a73d45a17de 95 if (cornername & 0x8)
DVLevine 0:9a73d45a17de 96 {
DVLevine 0:9a73d45a17de 97 drawPixel(x0 - y, y0 + x, color);
DVLevine 0:9a73d45a17de 98 drawPixel(x0 - x, y0 + y, color);
DVLevine 0:9a73d45a17de 99 }
DVLevine 0:9a73d45a17de 100
DVLevine 0:9a73d45a17de 101 if (cornername & 0x1)
DVLevine 0:9a73d45a17de 102 {
DVLevine 0:9a73d45a17de 103 drawPixel(x0 - y, y0 - x, color);
DVLevine 0:9a73d45a17de 104 drawPixel(x0 - x, y0 - y, color);
DVLevine 0:9a73d45a17de 105 }
DVLevine 0:9a73d45a17de 106 }
DVLevine 0:9a73d45a17de 107 }
DVLevine 0:9a73d45a17de 108
DVLevine 0:9a73d45a17de 109 void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
DVLevine 0:9a73d45a17de 110 {
DVLevine 0:9a73d45a17de 111 drawFastVLine(x0, y0-r, 2*r+1, color);
DVLevine 0:9a73d45a17de 112 fillCircleHelper(x0, y0, r, 3, 0, color);
DVLevine 0:9a73d45a17de 113 }
DVLevine 0:9a73d45a17de 114
DVLevine 0:9a73d45a17de 115 // used to do circles and roundrects!
DVLevine 0:9a73d45a17de 116 void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color)
DVLevine 0:9a73d45a17de 117 {
DVLevine 0:9a73d45a17de 118 int16_t f = 1 - r;
DVLevine 0:9a73d45a17de 119 int16_t ddF_x = 1;
DVLevine 0:9a73d45a17de 120 int16_t ddF_y = -2 * r;
DVLevine 0:9a73d45a17de 121 int16_t x = 0;
DVLevine 0:9a73d45a17de 122 int16_t y = r;
DVLevine 0:9a73d45a17de 123
DVLevine 0:9a73d45a17de 124 while (x<y)
DVLevine 0:9a73d45a17de 125 {
DVLevine 0:9a73d45a17de 126 if (f >= 0)
DVLevine 0:9a73d45a17de 127 {
DVLevine 0:9a73d45a17de 128 y--;
DVLevine 0:9a73d45a17de 129 ddF_y += 2;
DVLevine 0:9a73d45a17de 130 f += ddF_y;
DVLevine 0:9a73d45a17de 131 }
DVLevine 0:9a73d45a17de 132 x++;
DVLevine 0:9a73d45a17de 133 ddF_x += 2;
DVLevine 0:9a73d45a17de 134 f += ddF_x;
DVLevine 0:9a73d45a17de 135
DVLevine 0:9a73d45a17de 136 if (cornername & 0x1)
DVLevine 0:9a73d45a17de 137 {
DVLevine 0:9a73d45a17de 138 drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
DVLevine 0:9a73d45a17de 139 drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
DVLevine 0:9a73d45a17de 140 }
DVLevine 0:9a73d45a17de 141
DVLevine 0:9a73d45a17de 142 if (cornername & 0x2)
DVLevine 0:9a73d45a17de 143 {
DVLevine 0:9a73d45a17de 144 drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
DVLevine 0:9a73d45a17de 145 drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
DVLevine 0:9a73d45a17de 146 }
DVLevine 0:9a73d45a17de 147 }
DVLevine 0:9a73d45a17de 148 }
DVLevine 0:9a73d45a17de 149 #endif
DVLevine 0:9a73d45a17de 150
DVLevine 0:9a73d45a17de 151 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
DVLevine 0:9a73d45a17de 152 // bresenham's algorithm - thx wikpedia
DVLevine 0:9a73d45a17de 153 void Adafruit_GFX::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
DVLevine 0:9a73d45a17de 154 {
DVLevine 0:9a73d45a17de 155 int16_t steep = abs(y1 - y0) > abs(x1 - x0);
DVLevine 0:9a73d45a17de 156
DVLevine 0:9a73d45a17de 157 if (steep)
DVLevine 0:9a73d45a17de 158 {
DVLevine 0:9a73d45a17de 159 swap(x0, y0);
DVLevine 0:9a73d45a17de 160 swap(x1, y1);
DVLevine 0:9a73d45a17de 161 }
DVLevine 0:9a73d45a17de 162
DVLevine 0:9a73d45a17de 163 if (x0 > x1)
DVLevine 0:9a73d45a17de 164 {
DVLevine 0:9a73d45a17de 165 swap(x0, x1);
DVLevine 0:9a73d45a17de 166 swap(y0, y1);
DVLevine 0:9a73d45a17de 167 }
DVLevine 0:9a73d45a17de 168
DVLevine 0:9a73d45a17de 169 int16_t dx, dy;
DVLevine 0:9a73d45a17de 170 dx = x1 - x0;
DVLevine 0:9a73d45a17de 171 dy = abs(y1 - y0);
DVLevine 0:9a73d45a17de 172
DVLevine 0:9a73d45a17de 173 int16_t err = dx / 2;
DVLevine 0:9a73d45a17de 174 int16_t ystep;
DVLevine 0:9a73d45a17de 175
DVLevine 0:9a73d45a17de 176 if (y0 < y1)
DVLevine 0:9a73d45a17de 177 ystep = 1;
DVLevine 0:9a73d45a17de 178 else
DVLevine 0:9a73d45a17de 179 ystep = -1;
DVLevine 0:9a73d45a17de 180
DVLevine 0:9a73d45a17de 181 for (; x0<=x1; x0++)
DVLevine 0:9a73d45a17de 182 {
DVLevine 0:9a73d45a17de 183 if (steep)
DVLevine 0:9a73d45a17de 184 drawPixel(y0, x0, color);
DVLevine 0:9a73d45a17de 185 else
DVLevine 0:9a73d45a17de 186 drawPixel(x0, y0, color);
DVLevine 0:9a73d45a17de 187
DVLevine 0:9a73d45a17de 188 err -= dy;
DVLevine 0:9a73d45a17de 189 if (err < 0)
DVLevine 0:9a73d45a17de 190 {
DVLevine 0:9a73d45a17de 191 y0 += ystep;
DVLevine 0:9a73d45a17de 192 err += dx;
DVLevine 0:9a73d45a17de 193 }
DVLevine 0:9a73d45a17de 194 }
DVLevine 0:9a73d45a17de 195 }
DVLevine 0:9a73d45a17de 196
DVLevine 0:9a73d45a17de 197 void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
DVLevine 0:9a73d45a17de 198 {
DVLevine 0:9a73d45a17de 199 // stupidest version - update in subclasses if desired!
DVLevine 0:9a73d45a17de 200 drawLine(x, y, x, y+h-1, color);
DVLevine 0:9a73d45a17de 201 }
DVLevine 0:9a73d45a17de 202
DVLevine 0:9a73d45a17de 203 void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
DVLevine 0:9a73d45a17de 204 {
DVLevine 0:9a73d45a17de 205 // stupidest version - update in subclasses if desired!
DVLevine 0:9a73d45a17de 206 for (int16_t i=x; i<x+w; i++)
DVLevine 0:9a73d45a17de 207 drawFastVLine(i, y, h, color);
DVLevine 0:9a73d45a17de 208 }
DVLevine 0:9a73d45a17de 209 #endif
DVLevine 0:9a73d45a17de 210
DVLevine 0:9a73d45a17de 211 #if defined(GFX_WANT_ABSTRACTS)
DVLevine 0:9a73d45a17de 212 // draw a rectangle
DVLevine 0:9a73d45a17de 213 void Adafruit_GFX::drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
DVLevine 0:9a73d45a17de 214 {
DVLevine 0:9a73d45a17de 215 drawFastHLine(x, y, w, color);
DVLevine 0:9a73d45a17de 216 drawFastHLine(x, y+h-1, w, color);
DVLevine 0:9a73d45a17de 217 drawFastVLine(x, y, h, color);
DVLevine 0:9a73d45a17de 218 drawFastVLine(x+w-1, y, h, color);
DVLevine 0:9a73d45a17de 219 }
DVLevine 0:9a73d45a17de 220
DVLevine 0:9a73d45a17de 221 void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
DVLevine 0:9a73d45a17de 222 {
DVLevine 0:9a73d45a17de 223 // stupidest version - update in subclasses if desired!
DVLevine 0:9a73d45a17de 224 drawLine(x, y, x+w-1, y, color);
DVLevine 0:9a73d45a17de 225 }
DVLevine 0:9a73d45a17de 226
DVLevine 0:9a73d45a17de 227 void Adafruit_GFX::fillScreen(uint16_t color)
DVLevine 0:9a73d45a17de 228 {
DVLevine 0:9a73d45a17de 229 fillRect(0, 0, _width, _height, color);
DVLevine 0:9a73d45a17de 230 }
DVLevine 0:9a73d45a17de 231
DVLevine 0:9a73d45a17de 232 // draw a rounded rectangle!
DVLevine 0:9a73d45a17de 233 void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
DVLevine 0:9a73d45a17de 234 {
DVLevine 0:9a73d45a17de 235 // smarter version
DVLevine 0:9a73d45a17de 236 drawFastHLine(x+r , y , w-2*r, color); // Top
DVLevine 0:9a73d45a17de 237 drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
DVLevine 0:9a73d45a17de 238 drawFastVLine( x , y+r , h-2*r, color); // Left
DVLevine 0:9a73d45a17de 239 drawFastVLine( x+w-1, y+r , h-2*r, color); // Right
DVLevine 0:9a73d45a17de 240 // draw four corners
DVLevine 0:9a73d45a17de 241 drawCircleHelper(x+r , y+r , r, 1, color);
DVLevine 0:9a73d45a17de 242 drawCircleHelper(x+w-r-1, y+r , r, 2, color);
DVLevine 0:9a73d45a17de 243 drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
DVLevine 0:9a73d45a17de 244 drawCircleHelper(x+r , y+h-r-1, r, 8, color);
DVLevine 0:9a73d45a17de 245 }
DVLevine 0:9a73d45a17de 246
DVLevine 0:9a73d45a17de 247 // fill a rounded rectangle!
DVLevine 0:9a73d45a17de 248 void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
DVLevine 0:9a73d45a17de 249 {
DVLevine 0:9a73d45a17de 250 // smarter version
DVLevine 0:9a73d45a17de 251 fillRect(x+r, y, w-2*r, h, color);
DVLevine 0:9a73d45a17de 252
DVLevine 0:9a73d45a17de 253 // draw four corners
DVLevine 0:9a73d45a17de 254 fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
DVLevine 0:9a73d45a17de 255 fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
DVLevine 0:9a73d45a17de 256 }
DVLevine 0:9a73d45a17de 257
DVLevine 0:9a73d45a17de 258 // draw a triangle!
DVLevine 0:9a73d45a17de 259 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)
DVLevine 0:9a73d45a17de 260 {
DVLevine 0:9a73d45a17de 261 drawLine(x0, y0, x1, y1, color);
DVLevine 0:9a73d45a17de 262 drawLine(x1, y1, x2, y2, color);
DVLevine 0:9a73d45a17de 263 drawLine(x2, y2, x0, y0, color);
DVLevine 0:9a73d45a17de 264 }
DVLevine 0:9a73d45a17de 265
DVLevine 0:9a73d45a17de 266 // fill a triangle!
DVLevine 0:9a73d45a17de 267 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)
DVLevine 0:9a73d45a17de 268 {
DVLevine 0:9a73d45a17de 269 int16_t a, b, y, last;
DVLevine 0:9a73d45a17de 270
DVLevine 0:9a73d45a17de 271 // Sort coordinates by Y order (y2 >= y1 >= y0)
DVLevine 0:9a73d45a17de 272 if (y0 > y1)
DVLevine 0:9a73d45a17de 273 swap(y0, y1); swap(x0, x1);
DVLevine 0:9a73d45a17de 274
DVLevine 0:9a73d45a17de 275 if (y1 > y2)
DVLevine 0:9a73d45a17de 276 swap(y2, y1); swap(x2, x1);
DVLevine 0:9a73d45a17de 277
DVLevine 0:9a73d45a17de 278 if (y0 > y1)
DVLevine 0:9a73d45a17de 279 swap(y0, y1); swap(x0, x1);
DVLevine 0:9a73d45a17de 280
DVLevine 0:9a73d45a17de 281
DVLevine 0:9a73d45a17de 282 if(y0 == y2)
DVLevine 0:9a73d45a17de 283 { // Handle awkward all-on-same-line case as its own thing
DVLevine 0:9a73d45a17de 284 a = b = x0;
DVLevine 0:9a73d45a17de 285 if(x1 < a)
DVLevine 0:9a73d45a17de 286 a = x1;
DVLevine 0:9a73d45a17de 287 else if(x1 > b)
DVLevine 0:9a73d45a17de 288 b = x1;
DVLevine 0:9a73d45a17de 289
DVLevine 0:9a73d45a17de 290 if(x2 < a)
DVLevine 0:9a73d45a17de 291 a = x2;
DVLevine 0:9a73d45a17de 292 else if(x2 > b) b = x2;
DVLevine 0:9a73d45a17de 293 drawFastHLine(a, y0, b-a+1, color);
DVLevine 0:9a73d45a17de 294 return;
DVLevine 0:9a73d45a17de 295 }
DVLevine 0:9a73d45a17de 296
DVLevine 0:9a73d45a17de 297 int16_t
DVLevine 0:9a73d45a17de 298 dx01 = x1 - x0,
DVLevine 0:9a73d45a17de 299 dy01 = y1 - y0,
DVLevine 0:9a73d45a17de 300 dx02 = x2 - x0,
DVLevine 0:9a73d45a17de 301 dy02 = y2 - y0,
DVLevine 0:9a73d45a17de 302 dx12 = x2 - x1,
DVLevine 0:9a73d45a17de 303 dy12 = y2 - y1,
DVLevine 0:9a73d45a17de 304 sa = 0,
DVLevine 0:9a73d45a17de 305 sb = 0;
DVLevine 0:9a73d45a17de 306
DVLevine 0:9a73d45a17de 307 // For upper part of triangle, find scanline crossings for segments
DVLevine 0:9a73d45a17de 308 // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
DVLevine 0:9a73d45a17de 309 // is included here (and second loop will be skipped, avoiding a /0
DVLevine 0:9a73d45a17de 310 // error there), otherwise scanline y1 is skipped here and handled
DVLevine 0:9a73d45a17de 311 // in the second loop...which also avoids a /0 error here if y0=y1
DVLevine 0:9a73d45a17de 312 // (flat-topped triangle).
DVLevine 0:9a73d45a17de 313 if(y1 == y2)
DVLevine 0:9a73d45a17de 314 last = y1; // Include y1 scanline
DVLevine 0:9a73d45a17de 315 else
DVLevine 0:9a73d45a17de 316 last = y1-1; // Skip it
DVLevine 0:9a73d45a17de 317
DVLevine 0:9a73d45a17de 318 for(y=y0; y<=last; y++)
DVLevine 0:9a73d45a17de 319 {
DVLevine 0:9a73d45a17de 320 a = x0 + sa / dy01;
DVLevine 0:9a73d45a17de 321 b = x0 + sb / dy02;
DVLevine 0:9a73d45a17de 322 sa += dx01;
DVLevine 0:9a73d45a17de 323 sb += dx02;
DVLevine 0:9a73d45a17de 324 /* longhand:
DVLevine 0:9a73d45a17de 325 a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
DVLevine 0:9a73d45a17de 326 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
DVLevine 0:9a73d45a17de 327 */
DVLevine 0:9a73d45a17de 328 if(a > b)
DVLevine 0:9a73d45a17de 329 swap(a,b);
DVLevine 0:9a73d45a17de 330 drawFastHLine(a, y, b-a+1, color);
DVLevine 0:9a73d45a17de 331 }
DVLevine 0:9a73d45a17de 332
DVLevine 0:9a73d45a17de 333 // For lower part of triangle, find scanline crossings for segments
DVLevine 0:9a73d45a17de 334 // 0-2 and 1-2. This loop is skipped if y1=y2.
DVLevine 0:9a73d45a17de 335 sa = dx12 * (y - y1);
DVLevine 0:9a73d45a17de 336 sb = dx02 * (y - y0);
DVLevine 0:9a73d45a17de 337 for(; y<=y2; y++)
DVLevine 0:9a73d45a17de 338 {
DVLevine 0:9a73d45a17de 339 a = x1 + sa / dy12;
DVLevine 0:9a73d45a17de 340 b = x0 + sb / dy02;
DVLevine 0:9a73d45a17de 341 sa += dx12;
DVLevine 0:9a73d45a17de 342 sb += dx02;
DVLevine 0:9a73d45a17de 343 /* longhand:
DVLevine 0:9a73d45a17de 344 a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
DVLevine 0:9a73d45a17de 345 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
DVLevine 0:9a73d45a17de 346 */
DVLevine 0:9a73d45a17de 347 if(a > b)
DVLevine 0:9a73d45a17de 348 swap(a,b);
DVLevine 0:9a73d45a17de 349 drawFastHLine(a, y, b-a+1, color);
DVLevine 0:9a73d45a17de 350 }
DVLevine 0:9a73d45a17de 351 }
DVLevine 0:9a73d45a17de 352
DVLevine 0:9a73d45a17de 353 void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color)
DVLevine 0:9a73d45a17de 354 {
DVLevine 0:9a73d45a17de 355 for (int16_t j=0; j<h; j++)
DVLevine 0:9a73d45a17de 356 {
DVLevine 0:9a73d45a17de 357 for (int16_t i=0; i<w; i++ )
DVLevine 0:9a73d45a17de 358 {
DVLevine 0:9a73d45a17de 359 if (bitmap[i + (j/8)*w] & _BV(j%8))
DVLevine 0:9a73d45a17de 360 drawPixel(x+i, y+j, color);
DVLevine 0:9a73d45a17de 361 }
DVLevine 0:9a73d45a17de 362 }
DVLevine 0:9a73d45a17de 363 }
DVLevine 0:9a73d45a17de 364 #endif
DVLevine 0:9a73d45a17de 365
DVLevine 0:9a73d45a17de 366 size_t Adafruit_GFX::writeChar(uint8_t c)
DVLevine 0:9a73d45a17de 367 {
DVLevine 0:9a73d45a17de 368 if (c == '\n')
DVLevine 0:9a73d45a17de 369 {
DVLevine 0:9a73d45a17de 370 cursor_y += textsize*8;
DVLevine 0:9a73d45a17de 371 cursor_x = 0;
DVLevine 0:9a73d45a17de 372 }
DVLevine 0:9a73d45a17de 373 else if (c == '\r')
DVLevine 0:9a73d45a17de 374 cursor_x = 0;
DVLevine 0:9a73d45a17de 375 else
DVLevine 0:9a73d45a17de 376 {
DVLevine 0:9a73d45a17de 377 drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
DVLevine 0:9a73d45a17de 378 cursor_x += textsize*6;
DVLevine 0:9a73d45a17de 379 if (wrap && (cursor_x > (_width - textsize*6)))
DVLevine 0:9a73d45a17de 380 {
DVLevine 0:9a73d45a17de 381 cursor_y += textsize*8;
DVLevine 0:9a73d45a17de 382 cursor_x = 0;
DVLevine 0:9a73d45a17de 383 }
DVLevine 0:9a73d45a17de 384 }
DVLevine 0:9a73d45a17de 385 return 1;
DVLevine 0:9a73d45a17de 386 }
DVLevine 0:9a73d45a17de 387
DVLevine 0:9a73d45a17de 388 // draw a character
DVLevine 0:9a73d45a17de 389 void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
DVLevine 0:9a73d45a17de 390 {
DVLevine 0:9a73d45a17de 391 if(
DVLevine 0:9a73d45a17de 392 (x >= _width) || // Clip right
DVLevine 0:9a73d45a17de 393 (y >= _height) || // Clip bottom
DVLevine 0:9a73d45a17de 394 ((x + 5 * size - 1) < 0) || // Clip left
DVLevine 0:9a73d45a17de 395 ((y + 8 * size - 1) < 0) // Clip top
DVLevine 0:9a73d45a17de 396 )
DVLevine 0:9a73d45a17de 397 return;
DVLevine 0:9a73d45a17de 398
DVLevine 0:9a73d45a17de 399 for (int8_t i=0; i<6; i++ )
DVLevine 0:9a73d45a17de 400 {
DVLevine 0:9a73d45a17de 401 uint8_t line = 0;
DVLevine 0:9a73d45a17de 402
DVLevine 0:9a73d45a17de 403 if (i == 5)
DVLevine 0:9a73d45a17de 404 line = 0x0;
DVLevine 0:9a73d45a17de 405 else
DVLevine 0:9a73d45a17de 406 line = font[(c*5)+i];
DVLevine 0:9a73d45a17de 407
DVLevine 0:9a73d45a17de 408 for (int8_t j = 0; j<8; j++)
DVLevine 0:9a73d45a17de 409 {
DVLevine 0:9a73d45a17de 410 if (line & 0x1)
DVLevine 0:9a73d45a17de 411 {
DVLevine 0:9a73d45a17de 412 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
DVLevine 0:9a73d45a17de 413 if (size == 1) // default size
DVLevine 0:9a73d45a17de 414 drawPixel(x+i, y+j, color);
DVLevine 0:9a73d45a17de 415 else // big size
DVLevine 0:9a73d45a17de 416 fillRect(x+(i*size), y+(j*size), size, size, color);
DVLevine 0:9a73d45a17de 417 #else
DVLevine 0:9a73d45a17de 418 drawPixel(x+i, y+j, color);
DVLevine 0:9a73d45a17de 419 #endif
DVLevine 0:9a73d45a17de 420 }
DVLevine 0:9a73d45a17de 421 else if (bg != color)
DVLevine 0:9a73d45a17de 422 {
DVLevine 0:9a73d45a17de 423 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
DVLevine 0:9a73d45a17de 424 if (size == 1) // default size
DVLevine 0:9a73d45a17de 425 drawPixel(x+i, y+j, bg);
DVLevine 0:9a73d45a17de 426 else // big size
DVLevine 0:9a73d45a17de 427 fillRect(x+i*size, y+j*size, size, size, bg);
DVLevine 0:9a73d45a17de 428 #else
DVLevine 0:9a73d45a17de 429 drawPixel(x+i, y+j, bg);
DVLevine 0:9a73d45a17de 430 #endif
DVLevine 0:9a73d45a17de 431 }
DVLevine 0:9a73d45a17de 432 line >>= 1;
DVLevine 0:9a73d45a17de 433 }
DVLevine 0:9a73d45a17de 434 }
DVLevine 0:9a73d45a17de 435 }
DVLevine 0:9a73d45a17de 436
DVLevine 0:9a73d45a17de 437 void Adafruit_GFX::setRotation(uint8_t x)
DVLevine 0:9a73d45a17de 438 {
DVLevine 0:9a73d45a17de 439 x %= 4; // cant be higher than 3
DVLevine 0:9a73d45a17de 440 rotation = x;
DVLevine 0:9a73d45a17de 441 switch (x)
DVLevine 0:9a73d45a17de 442 {
DVLevine 0:9a73d45a17de 443 case 0:
DVLevine 0:9a73d45a17de 444 case 2:
DVLevine 0:9a73d45a17de 445 _width = _rawWidth;
DVLevine 0:9a73d45a17de 446 _height = _rawHeight;
DVLevine 0:9a73d45a17de 447 break;
DVLevine 0:9a73d45a17de 448 case 1:
DVLevine 0:9a73d45a17de 449 case 3:
DVLevine 0:9a73d45a17de 450 _width = _rawHeight;
DVLevine 0:9a73d45a17de 451 _height = _rawWidth;
DVLevine 0:9a73d45a17de 452 break;
DVLevine 0:9a73d45a17de 453 }
DVLevine 0:9a73d45a17de 454 }