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Dependencies:   mbed

SSD1306_mini/Adafruit_GFX.cpp@4:3618abce1646, 2022-04-21 (annotated)

Committer:
vitpetrik
Date:
Thu Apr 21 13:19:41 2022 +0000
Revision:
4:3618abce1646
Share for Stepan Oslejsek

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vitpetrik 4:3618abce1646 1 /***********************************
vitpetrik 4:3618abce1646 2 This is a our graphics core library, for all our displays.
vitpetrik 4:3618abce1646 3 We'll be adapting all the
vitpetrik 4:3618abce1646 4 existing libaries to use this core to make updating, support
vitpetrik 4:3618abce1646 5 and upgrading easier!
vitpetrik 4:3618abce1646 6
vitpetrik 4:3618abce1646 7 Adafruit invests time and resources providing this open source code,
vitpetrik 4:3618abce1646 8 please support Adafruit and open-source hardware by purchasing
vitpetrik 4:3618abce1646 9 products from Adafruit!
vitpetrik 4:3618abce1646 10
vitpetrik 4:3618abce1646 11 Written by Limor Fried/Ladyada for Adafruit Industries.
vitpetrik 4:3618abce1646 12 BSD license, check license.txt for more information
vitpetrik 4:3618abce1646 13 All text above must be included in any redistribution
vitpetrik 4:3618abce1646 14 ****************************************/
vitpetrik 4:3618abce1646 15
vitpetrik 4:3618abce1646 16 /*
vitpetrik 4:3618abce1646 17 * Modified by Neal Horman 7/14/2012 for use in mbed
vitpetrik 4:3618abce1646 18 */
vitpetrik 4:3618abce1646 19
vitpetrik 4:3618abce1646 20 #include "mbed.h"
vitpetrik 4:3618abce1646 21
vitpetrik 4:3618abce1646 22 #include "Adafruit_GFX.h"
vitpetrik 4:3618abce1646 23 #include "glcdfont.h"
vitpetrik 4:3618abce1646 24
vitpetrik 4:3618abce1646 25 #if defined(GFX_WANT_ABSTRACTS)
vitpetrik 4:3618abce1646 26 // draw a circle outline
vitpetrik 4:3618abce1646 27 void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
vitpetrik 4:3618abce1646 28 {
vitpetrik 4:3618abce1646 29 int16_t f = 1 - r;
vitpetrik 4:3618abce1646 30 int16_t ddF_x = 1;
vitpetrik 4:3618abce1646 31 int16_t ddF_y = -2 * r;
vitpetrik 4:3618abce1646 32 int16_t x = 0;
vitpetrik 4:3618abce1646 33 int16_t y = r;
vitpetrik 4:3618abce1646 34
vitpetrik 4:3618abce1646 35 drawPixel(x0, y0+r, color);
vitpetrik 4:3618abce1646 36 drawPixel(x0, y0-r, color);
vitpetrik 4:3618abce1646 37 drawPixel(x0+r, y0, color);
vitpetrik 4:3618abce1646 38 drawPixel(x0-r, y0, color);
vitpetrik 4:3618abce1646 39
vitpetrik 4:3618abce1646 40 while (x<y)
vitpetrik 4:3618abce1646 41 {
vitpetrik 4:3618abce1646 42 if (f >= 0)
vitpetrik 4:3618abce1646 43 {
vitpetrik 4:3618abce1646 44 y--;
vitpetrik 4:3618abce1646 45 ddF_y += 2;
vitpetrik 4:3618abce1646 46 f += ddF_y;
vitpetrik 4:3618abce1646 47 }
vitpetrik 4:3618abce1646 48 x++;
vitpetrik 4:3618abce1646 49 ddF_x += 2;
vitpetrik 4:3618abce1646 50 f += ddF_x;
vitpetrik 4:3618abce1646 51
vitpetrik 4:3618abce1646 52 drawPixel(x0 + x, y0 + y, color);
vitpetrik 4:3618abce1646 53 drawPixel(x0 - x, y0 + y, color);
vitpetrik 4:3618abce1646 54 drawPixel(x0 + x, y0 - y, color);
vitpetrik 4:3618abce1646 55 drawPixel(x0 - x, y0 - y, color);
vitpetrik 4:3618abce1646 56 drawPixel(x0 + y, y0 + x, color);
vitpetrik 4:3618abce1646 57 drawPixel(x0 - y, y0 + x, color);
vitpetrik 4:3618abce1646 58 drawPixel(x0 + y, y0 - x, color);
vitpetrik 4:3618abce1646 59 drawPixel(x0 - y, y0 - x, color);
vitpetrik 4:3618abce1646 60 }
vitpetrik 4:3618abce1646 61 }
vitpetrik 4:3618abce1646 62
vitpetrik 4:3618abce1646 63 void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color)
vitpetrik 4:3618abce1646 64 {
vitpetrik 4:3618abce1646 65 int16_t f = 1 - r;
vitpetrik 4:3618abce1646 66 int16_t ddF_x = 1;
vitpetrik 4:3618abce1646 67 int16_t ddF_y = -2 * r;
vitpetrik 4:3618abce1646 68 int16_t x = 0;
vitpetrik 4:3618abce1646 69 int16_t y = r;
vitpetrik 4:3618abce1646 70
vitpetrik 4:3618abce1646 71 while (x<y)
vitpetrik 4:3618abce1646 72 {
vitpetrik 4:3618abce1646 73 if (f >= 0)
vitpetrik 4:3618abce1646 74 {
vitpetrik 4:3618abce1646 75 y--;
vitpetrik 4:3618abce1646 76 ddF_y += 2;
vitpetrik 4:3618abce1646 77 f += ddF_y;
vitpetrik 4:3618abce1646 78 }
vitpetrik 4:3618abce1646 79 x++;
vitpetrik 4:3618abce1646 80 ddF_x += 2;
vitpetrik 4:3618abce1646 81 f += ddF_x;
vitpetrik 4:3618abce1646 82
vitpetrik 4:3618abce1646 83 if (cornername & 0x4)
vitpetrik 4:3618abce1646 84 {
vitpetrik 4:3618abce1646 85 drawPixel(x0 + x, y0 + y, color);
vitpetrik 4:3618abce1646 86 drawPixel(x0 + y, y0 + x, color);
vitpetrik 4:3618abce1646 87 }
vitpetrik 4:3618abce1646 88
vitpetrik 4:3618abce1646 89 if (cornername & 0x2)
vitpetrik 4:3618abce1646 90 {
vitpetrik 4:3618abce1646 91 drawPixel(x0 + x, y0 - y, color);
vitpetrik 4:3618abce1646 92 drawPixel(x0 + y, y0 - x, color);
vitpetrik 4:3618abce1646 93 }
vitpetrik 4:3618abce1646 94
vitpetrik 4:3618abce1646 95 if (cornername & 0x8)
vitpetrik 4:3618abce1646 96 {
vitpetrik 4:3618abce1646 97 drawPixel(x0 - y, y0 + x, color);
vitpetrik 4:3618abce1646 98 drawPixel(x0 - x, y0 + y, color);
vitpetrik 4:3618abce1646 99 }
vitpetrik 4:3618abce1646 100
vitpetrik 4:3618abce1646 101 if (cornername & 0x1)
vitpetrik 4:3618abce1646 102 {
vitpetrik 4:3618abce1646 103 drawPixel(x0 - y, y0 - x, color);
vitpetrik 4:3618abce1646 104 drawPixel(x0 - x, y0 - y, color);
vitpetrik 4:3618abce1646 105 }
vitpetrik 4:3618abce1646 106 }
vitpetrik 4:3618abce1646 107 }
vitpetrik 4:3618abce1646 108
vitpetrik 4:3618abce1646 109 void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
vitpetrik 4:3618abce1646 110 {
vitpetrik 4:3618abce1646 111 drawFastVLine(x0, y0-r, 2*r+1, color);
vitpetrik 4:3618abce1646 112 fillCircleHelper(x0, y0, r, 3, 0, color);
vitpetrik 4:3618abce1646 113 }
vitpetrik 4:3618abce1646 114
vitpetrik 4:3618abce1646 115 // used to do circles and roundrects!
vitpetrik 4:3618abce1646 116 void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color)
vitpetrik 4:3618abce1646 117 {
vitpetrik 4:3618abce1646 118 int16_t f = 1 - r;
vitpetrik 4:3618abce1646 119 int16_t ddF_x = 1;
vitpetrik 4:3618abce1646 120 int16_t ddF_y = -2 * r;
vitpetrik 4:3618abce1646 121 int16_t x = 0;
vitpetrik 4:3618abce1646 122 int16_t y = r;
vitpetrik 4:3618abce1646 123
vitpetrik 4:3618abce1646 124 while (x<y)
vitpetrik 4:3618abce1646 125 {
vitpetrik 4:3618abce1646 126 if (f >= 0)
vitpetrik 4:3618abce1646 127 {
vitpetrik 4:3618abce1646 128 y--;
vitpetrik 4:3618abce1646 129 ddF_y += 2;
vitpetrik 4:3618abce1646 130 f += ddF_y;
vitpetrik 4:3618abce1646 131 }
vitpetrik 4:3618abce1646 132 x++;
vitpetrik 4:3618abce1646 133 ddF_x += 2;
vitpetrik 4:3618abce1646 134 f += ddF_x;
vitpetrik 4:3618abce1646 135
vitpetrik 4:3618abce1646 136 if (cornername & 0x1)
vitpetrik 4:3618abce1646 137 {
vitpetrik 4:3618abce1646 138 drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
vitpetrik 4:3618abce1646 139 drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
vitpetrik 4:3618abce1646 140 }
vitpetrik 4:3618abce1646 141
vitpetrik 4:3618abce1646 142 if (cornername & 0x2)
vitpetrik 4:3618abce1646 143 {
vitpetrik 4:3618abce1646 144 drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
vitpetrik 4:3618abce1646 145 drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
vitpetrik 4:3618abce1646 146 }
vitpetrik 4:3618abce1646 147 }
vitpetrik 4:3618abce1646 148 }
vitpetrik 4:3618abce1646 149 #endif
vitpetrik 4:3618abce1646 150
vitpetrik 4:3618abce1646 151 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
vitpetrik 4:3618abce1646 152 // bresenham's algorithm - thx wikpedia
vitpetrik 4:3618abce1646 153 void Adafruit_GFX::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
vitpetrik 4:3618abce1646 154 {
vitpetrik 4:3618abce1646 155 int16_t steep = abs(y1 - y0) > abs(x1 - x0);
vitpetrik 4:3618abce1646 156
vitpetrik 4:3618abce1646 157 if (steep)
vitpetrik 4:3618abce1646 158 {
vitpetrik 4:3618abce1646 159 swap(x0, y0);
vitpetrik 4:3618abce1646 160 swap(x1, y1);
vitpetrik 4:3618abce1646 161 }
vitpetrik 4:3618abce1646 162
vitpetrik 4:3618abce1646 163 if (x0 > x1)
vitpetrik 4:3618abce1646 164 {
vitpetrik 4:3618abce1646 165 swap(x0, x1);
vitpetrik 4:3618abce1646 166 swap(y0, y1);
vitpetrik 4:3618abce1646 167 }
vitpetrik 4:3618abce1646 168
vitpetrik 4:3618abce1646 169 int16_t dx, dy;
vitpetrik 4:3618abce1646 170 dx = x1 - x0;
vitpetrik 4:3618abce1646 171 dy = abs(y1 - y0);
vitpetrik 4:3618abce1646 172
vitpetrik 4:3618abce1646 173 int16_t err = dx / 2;
vitpetrik 4:3618abce1646 174 int16_t ystep;
vitpetrik 4:3618abce1646 175
vitpetrik 4:3618abce1646 176 if (y0 < y1)
vitpetrik 4:3618abce1646 177 ystep = 1;
vitpetrik 4:3618abce1646 178 else
vitpetrik 4:3618abce1646 179 ystep = -1;
vitpetrik 4:3618abce1646 180
vitpetrik 4:3618abce1646 181 for (; x0<=x1; x0++)
vitpetrik 4:3618abce1646 182 {
vitpetrik 4:3618abce1646 183 if (steep)
vitpetrik 4:3618abce1646 184 drawPixel(y0, x0, color);
vitpetrik 4:3618abce1646 185 else
vitpetrik 4:3618abce1646 186 drawPixel(x0, y0, color);
vitpetrik 4:3618abce1646 187
vitpetrik 4:3618abce1646 188 err -= dy;
vitpetrik 4:3618abce1646 189 if (err < 0)
vitpetrik 4:3618abce1646 190 {
vitpetrik 4:3618abce1646 191 y0 += ystep;
vitpetrik 4:3618abce1646 192 err += dx;
vitpetrik 4:3618abce1646 193 }
vitpetrik 4:3618abce1646 194 }
vitpetrik 4:3618abce1646 195 }
vitpetrik 4:3618abce1646 196
vitpetrik 4:3618abce1646 197 void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
vitpetrik 4:3618abce1646 198 {
vitpetrik 4:3618abce1646 199 // stupidest version - update in subclasses if desired!
vitpetrik 4:3618abce1646 200 drawLine(x, y, x, y+h-1, color);
vitpetrik 4:3618abce1646 201 }
vitpetrik 4:3618abce1646 202
vitpetrik 4:3618abce1646 203 void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
vitpetrik 4:3618abce1646 204 {
vitpetrik 4:3618abce1646 205 // stupidest version - update in subclasses if desired!
vitpetrik 4:3618abce1646 206 for (int16_t i=x; i<x+w; i++)
vitpetrik 4:3618abce1646 207 drawFastVLine(i, y, h, color);
vitpetrik 4:3618abce1646 208 }
vitpetrik 4:3618abce1646 209 #endif
vitpetrik 4:3618abce1646 210
vitpetrik 4:3618abce1646 211 #if defined(GFX_WANT_ABSTRACTS)
vitpetrik 4:3618abce1646 212 // draw a rectangle
vitpetrik 4:3618abce1646 213 void Adafruit_GFX::drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
vitpetrik 4:3618abce1646 214 {
vitpetrik 4:3618abce1646 215 drawFastHLine(x, y, w, color);
vitpetrik 4:3618abce1646 216 drawFastHLine(x, y+h-1, w, color);
vitpetrik 4:3618abce1646 217 drawFastVLine(x, y, h, color);
vitpetrik 4:3618abce1646 218 drawFastVLine(x+w-1, y, h, color);
vitpetrik 4:3618abce1646 219 }
vitpetrik 4:3618abce1646 220
vitpetrik 4:3618abce1646 221 void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
vitpetrik 4:3618abce1646 222 {
vitpetrik 4:3618abce1646 223 // stupidest version - update in subclasses if desired!
vitpetrik 4:3618abce1646 224 drawLine(x, y, x+w-1, y, color);
vitpetrik 4:3618abce1646 225 }
vitpetrik 4:3618abce1646 226
vitpetrik 4:3618abce1646 227 void Adafruit_GFX::fillScreen(uint16_t color)
vitpetrik 4:3618abce1646 228 {
vitpetrik 4:3618abce1646 229 fillRect(0, 0, _width, _height, color);
vitpetrik 4:3618abce1646 230 }
vitpetrik 4:3618abce1646 231
vitpetrik 4:3618abce1646 232 // draw a rounded rectangle!
vitpetrik 4:3618abce1646 233 void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
vitpetrik 4:3618abce1646 234 {
vitpetrik 4:3618abce1646 235 // smarter version
vitpetrik 4:3618abce1646 236 drawFastHLine(x+r , y , w-2*r, color); // Top
vitpetrik 4:3618abce1646 237 drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
vitpetrik 4:3618abce1646 238 drawFastVLine( x , y+r , h-2*r, color); // Left
vitpetrik 4:3618abce1646 239 drawFastVLine( x+w-1, y+r , h-2*r, color); // Right
vitpetrik 4:3618abce1646 240 // draw four corners
vitpetrik 4:3618abce1646 241 drawCircleHelper(x+r , y+r , r, 1, color);
vitpetrik 4:3618abce1646 242 drawCircleHelper(x+w-r-1, y+r , r, 2, color);
vitpetrik 4:3618abce1646 243 drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
vitpetrik 4:3618abce1646 244 drawCircleHelper(x+r , y+h-r-1, r, 8, color);
vitpetrik 4:3618abce1646 245 }
vitpetrik 4:3618abce1646 246
vitpetrik 4:3618abce1646 247 // fill a rounded rectangle!
vitpetrik 4:3618abce1646 248 void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
vitpetrik 4:3618abce1646 249 {
vitpetrik 4:3618abce1646 250 // smarter version
vitpetrik 4:3618abce1646 251 fillRect(x+r, y, w-2*r, h, color);
vitpetrik 4:3618abce1646 252
vitpetrik 4:3618abce1646 253 // draw four corners
vitpetrik 4:3618abce1646 254 fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
vitpetrik 4:3618abce1646 255 fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
vitpetrik 4:3618abce1646 256 }
vitpetrik 4:3618abce1646 257
vitpetrik 4:3618abce1646 258 // draw a triangle!
vitpetrik 4:3618abce1646 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)
vitpetrik 4:3618abce1646 260 {
vitpetrik 4:3618abce1646 261 drawLine(x0, y0, x1, y1, color);
vitpetrik 4:3618abce1646 262 drawLine(x1, y1, x2, y2, color);
vitpetrik 4:3618abce1646 263 drawLine(x2, y2, x0, y0, color);
vitpetrik 4:3618abce1646 264 }
vitpetrik 4:3618abce1646 265
vitpetrik 4:3618abce1646 266 // fill a triangle!
vitpetrik 4:3618abce1646 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)
vitpetrik 4:3618abce1646 268 {
vitpetrik 4:3618abce1646 269 int16_t a, b, y, last;
vitpetrik 4:3618abce1646 270
vitpetrik 4:3618abce1646 271 // Sort coordinates by Y order (y2 >= y1 >= y0)
vitpetrik 4:3618abce1646 272 if (y0 > y1)
vitpetrik 4:3618abce1646 273 swap(y0, y1); swap(x0, x1);
vitpetrik 4:3618abce1646 274
vitpetrik 4:3618abce1646 275 if (y1 > y2)
vitpetrik 4:3618abce1646 276 swap(y2, y1); swap(x2, x1);
vitpetrik 4:3618abce1646 277
vitpetrik 4:3618abce1646 278 if (y0 > y1)
vitpetrik 4:3618abce1646 279 swap(y0, y1); swap(x0, x1);
vitpetrik 4:3618abce1646 280
vitpetrik 4:3618abce1646 281
vitpetrik 4:3618abce1646 282 if(y0 == y2)
vitpetrik 4:3618abce1646 283 { // Handle awkward all-on-same-line case as its own thing
vitpetrik 4:3618abce1646 284 a = b = x0;
vitpetrik 4:3618abce1646 285 if(x1 < a)
vitpetrik 4:3618abce1646 286 a = x1;
vitpetrik 4:3618abce1646 287 else if(x1 > b)
vitpetrik 4:3618abce1646 288 b = x1;
vitpetrik 4:3618abce1646 289
vitpetrik 4:3618abce1646 290 if(x2 < a)
vitpetrik 4:3618abce1646 291 a = x2;
vitpetrik 4:3618abce1646 292 else if(x2 > b) b = x2;
vitpetrik 4:3618abce1646 293 drawFastHLine(a, y0, b-a+1, color);
vitpetrik 4:3618abce1646 294 return;
vitpetrik 4:3618abce1646 295 }
vitpetrik 4:3618abce1646 296
vitpetrik 4:3618abce1646 297 int16_t
vitpetrik 4:3618abce1646 298 dx01 = x1 - x0,
vitpetrik 4:3618abce1646 299 dy01 = y1 - y0,
vitpetrik 4:3618abce1646 300 dx02 = x2 - x0,
vitpetrik 4:3618abce1646 301 dy02 = y2 - y0,
vitpetrik 4:3618abce1646 302 dx12 = x2 - x1,
vitpetrik 4:3618abce1646 303 dy12 = y2 - y1,
vitpetrik 4:3618abce1646 304 sa = 0,
vitpetrik 4:3618abce1646 305 sb = 0;
vitpetrik 4:3618abce1646 306
vitpetrik 4:3618abce1646 307 // For upper part of triangle, find scanline crossings for segments
vitpetrik 4:3618abce1646 308 // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
vitpetrik 4:3618abce1646 309 // is included here (and second loop will be skipped, avoiding a /0
vitpetrik 4:3618abce1646 310 // error there), otherwise scanline y1 is skipped here and handled
vitpetrik 4:3618abce1646 311 // in the second loop...which also avoids a /0 error here if y0=y1
vitpetrik 4:3618abce1646 312 // (flat-topped triangle).
vitpetrik 4:3618abce1646 313 if(y1 == y2)
vitpetrik 4:3618abce1646 314 last = y1; // Include y1 scanline
vitpetrik 4:3618abce1646 315 else
vitpetrik 4:3618abce1646 316 last = y1-1; // Skip it
vitpetrik 4:3618abce1646 317
vitpetrik 4:3618abce1646 318 for(y=y0; y<=last; y++)
vitpetrik 4:3618abce1646 319 {
vitpetrik 4:3618abce1646 320 a = x0 + sa / dy01;
vitpetrik 4:3618abce1646 321 b = x0 + sb / dy02;
vitpetrik 4:3618abce1646 322 sa += dx01;
vitpetrik 4:3618abce1646 323 sb += dx02;
vitpetrik 4:3618abce1646 324 /* longhand:
vitpetrik 4:3618abce1646 325 a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
vitpetrik 4:3618abce1646 326 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
vitpetrik 4:3618abce1646 327 */
vitpetrik 4:3618abce1646 328 if(a > b)
vitpetrik 4:3618abce1646 329 swap(a,b);
vitpetrik 4:3618abce1646 330 drawFastHLine(a, y, b-a+1, color);
vitpetrik 4:3618abce1646 331 }
vitpetrik 4:3618abce1646 332
vitpetrik 4:3618abce1646 333 // For lower part of triangle, find scanline crossings for segments
vitpetrik 4:3618abce1646 334 // 0-2 and 1-2. This loop is skipped if y1=y2.
vitpetrik 4:3618abce1646 335 sa = dx12 * (y - y1);
vitpetrik 4:3618abce1646 336 sb = dx02 * (y - y0);
vitpetrik 4:3618abce1646 337 for(; y<=y2; y++)
vitpetrik 4:3618abce1646 338 {
vitpetrik 4:3618abce1646 339 a = x1 + sa / dy12;
vitpetrik 4:3618abce1646 340 b = x0 + sb / dy02;
vitpetrik 4:3618abce1646 341 sa += dx12;
vitpetrik 4:3618abce1646 342 sb += dx02;
vitpetrik 4:3618abce1646 343 /* longhand:
vitpetrik 4:3618abce1646 344 a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
vitpetrik 4:3618abce1646 345 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
vitpetrik 4:3618abce1646 346 */
vitpetrik 4:3618abce1646 347 if(a > b)
vitpetrik 4:3618abce1646 348 swap(a,b);
vitpetrik 4:3618abce1646 349 drawFastHLine(a, y, b-a+1, color);
vitpetrik 4:3618abce1646 350 }
vitpetrik 4:3618abce1646 351 }
vitpetrik 4:3618abce1646 352
vitpetrik 4:3618abce1646 353 void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color)
vitpetrik 4:3618abce1646 354 {
vitpetrik 4:3618abce1646 355 for (int16_t j=0; j<h; j++)
vitpetrik 4:3618abce1646 356 {
vitpetrik 4:3618abce1646 357 for (int16_t i=0; i<w; i++ )
vitpetrik 4:3618abce1646 358 {
vitpetrik 4:3618abce1646 359 if (bitmap[i + (j/8)*w] & _BV(j%8))
vitpetrik 4:3618abce1646 360 drawPixel(x+i, y+j, color);
vitpetrik 4:3618abce1646 361 }
vitpetrik 4:3618abce1646 362 }
vitpetrik 4:3618abce1646 363 }
vitpetrik 4:3618abce1646 364 #endif
vitpetrik 4:3618abce1646 365
vitpetrik 4:3618abce1646 366 size_t Adafruit_GFX::writeChar(uint8_t c)
vitpetrik 4:3618abce1646 367 {
vitpetrik 4:3618abce1646 368 if (c == '\n')
vitpetrik 4:3618abce1646 369 {
vitpetrik 4:3618abce1646 370 cursor_y += textsize*8;
vitpetrik 4:3618abce1646 371 cursor_x = 0;
vitpetrik 4:3618abce1646 372 }
vitpetrik 4:3618abce1646 373 else if (c == '\r')
vitpetrik 4:3618abce1646 374 cursor_x = 0;
vitpetrik 4:3618abce1646 375 else
vitpetrik 4:3618abce1646 376 {
vitpetrik 4:3618abce1646 377 drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
vitpetrik 4:3618abce1646 378 cursor_x += textsize*6;
vitpetrik 4:3618abce1646 379 if (wrap && (cursor_x > (_width - textsize*6)))
vitpetrik 4:3618abce1646 380 {
vitpetrik 4:3618abce1646 381 cursor_y += textsize*8;
vitpetrik 4:3618abce1646 382 cursor_x = 0;
vitpetrik 4:3618abce1646 383 }
vitpetrik 4:3618abce1646 384 }
vitpetrik 4:3618abce1646 385 return 1;
vitpetrik 4:3618abce1646 386 }
vitpetrik 4:3618abce1646 387
vitpetrik 4:3618abce1646 388 // draw a character
vitpetrik 4:3618abce1646 389 void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
vitpetrik 4:3618abce1646 390 {
vitpetrik 4:3618abce1646 391 if(
vitpetrik 4:3618abce1646 392 (x >= _width) || // Clip right
vitpetrik 4:3618abce1646 393 (y >= _height) || // Clip bottom
vitpetrik 4:3618abce1646 394 ((x + 5 * size - 1) < 0) || // Clip left
vitpetrik 4:3618abce1646 395 ((y + 8 * size - 1) < 0) // Clip top
vitpetrik 4:3618abce1646 396 )
vitpetrik 4:3618abce1646 397 return;
vitpetrik 4:3618abce1646 398
vitpetrik 4:3618abce1646 399 for (int8_t i=0; i<6; i++ )
vitpetrik 4:3618abce1646 400 {
vitpetrik 4:3618abce1646 401 uint8_t line = 0;
vitpetrik 4:3618abce1646 402
vitpetrik 4:3618abce1646 403 if (i == 5)
vitpetrik 4:3618abce1646 404 line = 0x0;
vitpetrik 4:3618abce1646 405 else
vitpetrik 4:3618abce1646 406 line = font[(c*5)+i];
vitpetrik 4:3618abce1646 407
vitpetrik 4:3618abce1646 408 for (int8_t j = 0; j<8; j++)
vitpetrik 4:3618abce1646 409 {
vitpetrik 4:3618abce1646 410 if (line & 0x1)
vitpetrik 4:3618abce1646 411 {
vitpetrik 4:3618abce1646 412 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
vitpetrik 4:3618abce1646 413 if (size == 1) // default size
vitpetrik 4:3618abce1646 414 drawPixel(x+i, y+j, color);
vitpetrik 4:3618abce1646 415 else // big size
vitpetrik 4:3618abce1646 416 fillRect(x+(i*size), y+(j*size), size, size, color);
vitpetrik 4:3618abce1646 417 #else
vitpetrik 4:3618abce1646 418 drawPixel(x+i, y+j, color);
vitpetrik 4:3618abce1646 419 #endif
vitpetrik 4:3618abce1646 420 }
vitpetrik 4:3618abce1646 421 else if (bg != color)
vitpetrik 4:3618abce1646 422 {
vitpetrik 4:3618abce1646 423 #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
vitpetrik 4:3618abce1646 424 if (size == 1) // default size
vitpetrik 4:3618abce1646 425 drawPixel(x+i, y+j, bg);
vitpetrik 4:3618abce1646 426 else // big size
vitpetrik 4:3618abce1646 427 fillRect(x+i*size, y+j*size, size, size, bg);
vitpetrik 4:3618abce1646 428 #else
vitpetrik 4:3618abce1646 429 drawPixel(x+i, y+j, bg);
vitpetrik 4:3618abce1646 430 #endif
vitpetrik 4:3618abce1646 431 }
vitpetrik 4:3618abce1646 432 line >>= 1;
vitpetrik 4:3618abce1646 433 }
vitpetrik 4:3618abce1646 434 }
vitpetrik 4:3618abce1646 435 }
vitpetrik 4:3618abce1646 436
vitpetrik 4:3618abce1646 437 void Adafruit_GFX::setRotation(uint8_t x)
vitpetrik 4:3618abce1646 438 {
vitpetrik 4:3618abce1646 439 x %= 4; // cant be higher than 3
vitpetrik 4:3618abce1646 440 rotation = x;
vitpetrik 4:3618abce1646 441 switch (x)
vitpetrik 4:3618abce1646 442 {
vitpetrik 4:3618abce1646 443 case 0:
vitpetrik 4:3618abce1646 444 case 2:
vitpetrik 4:3618abce1646 445 _width = _rawWidth;
vitpetrik 4:3618abce1646 446 _height = _rawHeight;
vitpetrik 4:3618abce1646 447 break;
vitpetrik 4:3618abce1646 448 case 1:
vitpetrik 4:3618abce1646 449 case 3:
vitpetrik 4:3618abce1646 450 _width = _rawHeight;
vitpetrik 4:3618abce1646 451 _height = _rawWidth;
vitpetrik 4:3618abce1646 452 break;
vitpetrik 4:3618abce1646 453 }
vitpetrik 4:3618abce1646 454 }
vitpetrik 4:3618abce1646 455
vitpetrik 4:3618abce1646 456