Timo Karppinen / Adafruit-GFX-MbedOS6

Adafruit-GFX porting for mbed OS6. Needed to add #include "Stream.h" in beginning of the Adafruit_GFX.h

Dependents:   ollin-ja-samin-hieno-ihmislaskin MCLAB10 OLEDrgb_MP OLEDrgb_MIC3_L432KC_OS6_hk McLab10_OLEDrgb_L432KC_OS60_tk2

Adafruit_GFX.cpp@0:3e9c32359703, 2014-05-23 (annotated)

Committer:
lelect
Date:
Fri May 23 15:05:48 2014 +0000
Revision:
0:3e9c32359703
Child:
1:c2715acb7466
Initial Commit; No compile error

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lelect 0:3e9c32359703 1 /*
lelect 0:3e9c32359703 2 This is the core graphics library for all our displays, providing a common
lelect 0:3e9c32359703 3 set of graphics primitives (points, lines, circles, etc.). It needs to be
lelect 0:3e9c32359703 4 paired with a hardware-specific library for each display device we carry
lelect 0:3e9c32359703 5 (to handle the lower-level functions).
lelect 0:3e9c32359703 6
lelect 0:3e9c32359703 7 Adafruit invests time and resources providing this open source code, please
lelect 0:3e9c32359703 8 support Adafruit & open-source hardware by purchasing products from Adafruit!
lelect 0:3e9c32359703 9
lelect 0:3e9c32359703 10 Copyright (c) 2013 Adafruit Industries. All rights reserved.
lelect 0:3e9c32359703 11
lelect 0:3e9c32359703 12 Redistribution and use in source and binary forms, with or without
lelect 0:3e9c32359703 13 modification, are permitted provided that the following conditions are met:
lelect 0:3e9c32359703 14
lelect 0:3e9c32359703 15 - Redistributions of source code must retain the above copyright notice,
lelect 0:3e9c32359703 16 this list of conditions and the following disclaimer.
lelect 0:3e9c32359703 17 - Redistributions in binary form must reproduce the above copyright notice,
lelect 0:3e9c32359703 18 this list of conditions and the following disclaimer in the documentation
lelect 0:3e9c32359703 19 and/or other materials provided with the distribution.
lelect 0:3e9c32359703 20
lelect 0:3e9c32359703 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
lelect 0:3e9c32359703 22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
lelect 0:3e9c32359703 23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
lelect 0:3e9c32359703 24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
lelect 0:3e9c32359703 25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
lelect 0:3e9c32359703 26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
lelect 0:3e9c32359703 27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
lelect 0:3e9c32359703 28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
lelect 0:3e9c32359703 29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
lelect 0:3e9c32359703 30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
lelect 0:3e9c32359703 31 POSSIBILITY OF SUCH DAMAGE.
lelect 0:3e9c32359703 32 */
lelect 0:3e9c32359703 33
lelect 0:3e9c32359703 34 #include "mbed.h"
lelect 0:3e9c32359703 35 #include "Adafruit_GFX.h"
lelect 0:3e9c32359703 36 #include "glcdfont.h"
lelect 0:3e9c32359703 37
lelect 0:3e9c32359703 38
lelect 0:3e9c32359703 39 // Draw a circle outline
lelect 0:3e9c32359703 40 void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r,
lelect 0:3e9c32359703 41 uint16_t color)
lelect 0:3e9c32359703 42 {
lelect 0:3e9c32359703 43 int16_t f = 1 - r;
lelect 0:3e9c32359703 44 int16_t ddF_x = 1;
lelect 0:3e9c32359703 45 int16_t ddF_y = -2 * r;
lelect 0:3e9c32359703 46 int16_t x = 0;
lelect 0:3e9c32359703 47 int16_t y = r;
lelect 0:3e9c32359703 48
lelect 0:3e9c32359703 49 drawPixel(x0 , y0+r, color);
lelect 0:3e9c32359703 50 drawPixel(x0 , y0-r, color);
lelect 0:3e9c32359703 51 drawPixel(x0+r, y0 , color);
lelect 0:3e9c32359703 52 drawPixel(x0-r, y0 , color);
lelect 0:3e9c32359703 53
lelect 0:3e9c32359703 54 while (x<y) {
lelect 0:3e9c32359703 55 if (f >= 0) {
lelect 0:3e9c32359703 56 y--;
lelect 0:3e9c32359703 57 ddF_y += 2;
lelect 0:3e9c32359703 58 f += ddF_y;
lelect 0:3e9c32359703 59 }
lelect 0:3e9c32359703 60 x++;
lelect 0:3e9c32359703 61 ddF_x += 2;
lelect 0:3e9c32359703 62 f += ddF_x;
lelect 0:3e9c32359703 63
lelect 0:3e9c32359703 64 drawPixel(x0 + x, y0 + y, color);
lelect 0:3e9c32359703 65 drawPixel(x0 - x, y0 + y, color);
lelect 0:3e9c32359703 66 drawPixel(x0 + x, y0 - y, color);
lelect 0:3e9c32359703 67 drawPixel(x0 - x, y0 - y, color);
lelect 0:3e9c32359703 68 drawPixel(x0 + y, y0 + x, color);
lelect 0:3e9c32359703 69 drawPixel(x0 - y, y0 + x, color);
lelect 0:3e9c32359703 70 drawPixel(x0 + y, y0 - x, color);
lelect 0:3e9c32359703 71 drawPixel(x0 - y, y0 - x, color);
lelect 0:3e9c32359703 72 }
lelect 0:3e9c32359703 73 }
lelect 0:3e9c32359703 74
lelect 0:3e9c32359703 75 void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0,
lelect 0:3e9c32359703 76 int16_t r, uint8_t cornername, uint16_t color)
lelect 0:3e9c32359703 77 {
lelect 0:3e9c32359703 78 int16_t f = 1 - r;
lelect 0:3e9c32359703 79 int16_t ddF_x = 1;
lelect 0:3e9c32359703 80 int16_t ddF_y = -2 * r;
lelect 0:3e9c32359703 81 int16_t x = 0;
lelect 0:3e9c32359703 82 int16_t y = r;
lelect 0:3e9c32359703 83
lelect 0:3e9c32359703 84 while (x<y) {
lelect 0:3e9c32359703 85 if (f >= 0) {
lelect 0:3e9c32359703 86 y--;
lelect 0:3e9c32359703 87 ddF_y += 2;
lelect 0:3e9c32359703 88 f += ddF_y;
lelect 0:3e9c32359703 89 }
lelect 0:3e9c32359703 90 x++;
lelect 0:3e9c32359703 91 ddF_x += 2;
lelect 0:3e9c32359703 92 f += ddF_x;
lelect 0:3e9c32359703 93 if (cornername & 0x4) {
lelect 0:3e9c32359703 94 drawPixel(x0 + x, y0 + y, color);
lelect 0:3e9c32359703 95 drawPixel(x0 + y, y0 + x, color);
lelect 0:3e9c32359703 96 }
lelect 0:3e9c32359703 97 if (cornername & 0x2) {
lelect 0:3e9c32359703 98 drawPixel(x0 + x, y0 - y, color);
lelect 0:3e9c32359703 99 drawPixel(x0 + y, y0 - x, color);
lelect 0:3e9c32359703 100 }
lelect 0:3e9c32359703 101 if (cornername & 0x8) {
lelect 0:3e9c32359703 102 drawPixel(x0 - y, y0 + x, color);
lelect 0:3e9c32359703 103 drawPixel(x0 - x, y0 + y, color);
lelect 0:3e9c32359703 104 }
lelect 0:3e9c32359703 105 if (cornername & 0x1) {
lelect 0:3e9c32359703 106 drawPixel(x0 - y, y0 - x, color);
lelect 0:3e9c32359703 107 drawPixel(x0 - x, y0 - y, color);
lelect 0:3e9c32359703 108 }
lelect 0:3e9c32359703 109 }
lelect 0:3e9c32359703 110 }
lelect 0:3e9c32359703 111
lelect 0:3e9c32359703 112 void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r,
lelect 0:3e9c32359703 113 uint16_t color)
lelect 0:3e9c32359703 114 {
lelect 0:3e9c32359703 115 drawFastVLine(x0, y0-r, 2*r+1, color);
lelect 0:3e9c32359703 116 fillCircleHelper(x0, y0, r, 3, 0, color);
lelect 0:3e9c32359703 117 }
lelect 0:3e9c32359703 118
lelect 0:3e9c32359703 119 // Used to do circles and roundrects
lelect 0:3e9c32359703 120 void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r,
lelect 0:3e9c32359703 121 uint8_t cornername, int16_t delta, uint16_t color)
lelect 0:3e9c32359703 122 {
lelect 0:3e9c32359703 123
lelect 0:3e9c32359703 124 int16_t f = 1 - r;
lelect 0:3e9c32359703 125 int16_t ddF_x = 1;
lelect 0:3e9c32359703 126 int16_t ddF_y = -2 * r;
lelect 0:3e9c32359703 127 int16_t x = 0;
lelect 0:3e9c32359703 128 int16_t y = r;
lelect 0:3e9c32359703 129
lelect 0:3e9c32359703 130 while (x<y) {
lelect 0:3e9c32359703 131 if (f >= 0) {
lelect 0:3e9c32359703 132 y--;
lelect 0:3e9c32359703 133 ddF_y += 2;
lelect 0:3e9c32359703 134 f += ddF_y;
lelect 0:3e9c32359703 135 }
lelect 0:3e9c32359703 136 x++;
lelect 0:3e9c32359703 137 ddF_x += 2;
lelect 0:3e9c32359703 138 f += ddF_x;
lelect 0:3e9c32359703 139
lelect 0:3e9c32359703 140 if (cornername & 0x1) {
lelect 0:3e9c32359703 141 drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
lelect 0:3e9c32359703 142 drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
lelect 0:3e9c32359703 143 }
lelect 0:3e9c32359703 144 if (cornername & 0x2) {
lelect 0:3e9c32359703 145 drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
lelect 0:3e9c32359703 146 drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
lelect 0:3e9c32359703 147 }
lelect 0:3e9c32359703 148 }
lelect 0:3e9c32359703 149 }
lelect 0:3e9c32359703 150
lelect 0:3e9c32359703 151 // Bresenham's algorithm - thx wikpedia
lelect 0:3e9c32359703 152 void Adafruit_GFX::drawLine(int16_t x0, int16_t y0,
lelect 0:3e9c32359703 153 int16_t x1, int16_t y1,
lelect 0:3e9c32359703 154 uint16_t color)
lelect 0:3e9c32359703 155 {
lelect 0:3e9c32359703 156 int16_t steep = abs(y1 - y0) > abs(x1 - x0);
lelect 0:3e9c32359703 157 if (steep) {
lelect 0:3e9c32359703 158 swap(x0, y0);
lelect 0:3e9c32359703 159 swap(x1, y1);
lelect 0:3e9c32359703 160 }
lelect 0:3e9c32359703 161
lelect 0:3e9c32359703 162 if (x0 > x1) {
lelect 0:3e9c32359703 163 swap(x0, x1);
lelect 0:3e9c32359703 164 swap(y0, y1);
lelect 0:3e9c32359703 165 }
lelect 0:3e9c32359703 166
lelect 0:3e9c32359703 167 int16_t dx, dy;
lelect 0:3e9c32359703 168 dx = x1 - x0;
lelect 0:3e9c32359703 169 dy = abs(y1 - y0);
lelect 0:3e9c32359703 170
lelect 0:3e9c32359703 171 int16_t err = dx / 2;
lelect 0:3e9c32359703 172 int16_t ystep;
lelect 0:3e9c32359703 173
lelect 0:3e9c32359703 174 if (y0 < y1) {
lelect 0:3e9c32359703 175 ystep = 1;
lelect 0:3e9c32359703 176 } else {
lelect 0:3e9c32359703 177 ystep = -1;
lelect 0:3e9c32359703 178 }
lelect 0:3e9c32359703 179
lelect 0:3e9c32359703 180 for (; x0<=x1; x0++) {
lelect 0:3e9c32359703 181 if (steep) {
lelect 0:3e9c32359703 182 drawPixel(y0, x0, color);
lelect 0:3e9c32359703 183 } else {
lelect 0:3e9c32359703 184 drawPixel(x0, y0, color);
lelect 0:3e9c32359703 185 }
lelect 0:3e9c32359703 186 err -= dy;
lelect 0:3e9c32359703 187 if (err < 0) {
lelect 0:3e9c32359703 188 y0 += ystep;
lelect 0:3e9c32359703 189 err += dx;
lelect 0:3e9c32359703 190 }
lelect 0:3e9c32359703 191 }
lelect 0:3e9c32359703 192 }
lelect 0:3e9c32359703 193
lelect 0:3e9c32359703 194 // Draw a rectangle
lelect 0:3e9c32359703 195 void Adafruit_GFX::drawRect(int16_t x, int16_t y,
lelect 0:3e9c32359703 196 int16_t w, int16_t h,
lelect 0:3e9c32359703 197 uint16_t color)
lelect 0:3e9c32359703 198 {
lelect 0:3e9c32359703 199 drawFastHLine(x, y, w, color);
lelect 0:3e9c32359703 200 drawFastHLine(x, y+h-1, w, color);
lelect 0:3e9c32359703 201 drawFastVLine(x, y, h, color);
lelect 0:3e9c32359703 202 drawFastVLine(x+w-1, y, h, color);
lelect 0:3e9c32359703 203 }
lelect 0:3e9c32359703 204
lelect 0:3e9c32359703 205 void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y,
lelect 0:3e9c32359703 206 int16_t h, uint16_t color)
lelect 0:3e9c32359703 207 {
lelect 0:3e9c32359703 208 // Update in subclasses if desired!
lelect 0:3e9c32359703 209 drawLine(x, y, x, y+h-1, color);
lelect 0:3e9c32359703 210 }
lelect 0:3e9c32359703 211
lelect 0:3e9c32359703 212 void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y,
lelect 0:3e9c32359703 213 int16_t w, uint16_t color)
lelect 0:3e9c32359703 214 {
lelect 0:3e9c32359703 215 // Update in subclasses if desired!
lelect 0:3e9c32359703 216 drawLine(x, y, x+w-1, y, color);
lelect 0:3e9c32359703 217 }
lelect 0:3e9c32359703 218
lelect 0:3e9c32359703 219 void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
lelect 0:3e9c32359703 220 uint16_t color)
lelect 0:3e9c32359703 221 {
lelect 0:3e9c32359703 222 // Update in subclasses if desired!
lelect 0:3e9c32359703 223 for (int16_t i=x; i<x+w; i++) {
lelect 0:3e9c32359703 224 drawFastVLine(i, y, h, color);
lelect 0:3e9c32359703 225 }
lelect 0:3e9c32359703 226 }
lelect 0:3e9c32359703 227
lelect 0:3e9c32359703 228 void Adafruit_GFX::fillScreen(uint16_t color)
lelect 0:3e9c32359703 229 {
lelect 0:3e9c32359703 230 fillRect(0, 0, _width, _height, color);
lelect 0:3e9c32359703 231 }
lelect 0:3e9c32359703 232
lelect 0:3e9c32359703 233 // Draw a rounded rectangle
lelect 0:3e9c32359703 234 void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w,
lelect 0:3e9c32359703 235 int16_t h, int16_t r, uint16_t color)
lelect 0:3e9c32359703 236 {
lelect 0:3e9c32359703 237 // smarter version
lelect 0:3e9c32359703 238 drawFastHLine(x+r , y , w-2*r, color); // Top
lelect 0:3e9c32359703 239 drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
lelect 0:3e9c32359703 240 drawFastVLine(x , y+r , h-2*r, color); // Left
lelect 0:3e9c32359703 241 drawFastVLine(x+w-1, y+r , h-2*r, color); // Right
lelect 0:3e9c32359703 242 // draw four corners
lelect 0:3e9c32359703 243 drawCircleHelper(x+r , y+r , r, 1, color);
lelect 0:3e9c32359703 244 drawCircleHelper(x+w-r-1, y+r , r, 2, color);
lelect 0:3e9c32359703 245 drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
lelect 0:3e9c32359703 246 drawCircleHelper(x+r , y+h-r-1, r, 8, color);
lelect 0:3e9c32359703 247 }
lelect 0:3e9c32359703 248
lelect 0:3e9c32359703 249 // Fill a rounded rectangle
lelect 0:3e9c32359703 250 void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w,
lelect 0:3e9c32359703 251 int16_t h, int16_t r, uint16_t color)
lelect 0:3e9c32359703 252 {
lelect 0:3e9c32359703 253 // smarter version
lelect 0:3e9c32359703 254 fillRect(x+r, y, w-2*r, h, color);
lelect 0:3e9c32359703 255
lelect 0:3e9c32359703 256 // draw four corners
lelect 0:3e9c32359703 257 fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
lelect 0:3e9c32359703 258 fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
lelect 0:3e9c32359703 259 }
lelect 0:3e9c32359703 260
lelect 0:3e9c32359703 261 // Draw a triangle
lelect 0:3e9c32359703 262 void Adafruit_GFX::drawTriangle(int16_t x0, int16_t y0,
lelect 0:3e9c32359703 263 int16_t x1, int16_t y1,
lelect 0:3e9c32359703 264 int16_t x2, int16_t y2, uint16_t color)
lelect 0:3e9c32359703 265 {
lelect 0:3e9c32359703 266 drawLine(x0, y0, x1, y1, color);
lelect 0:3e9c32359703 267 drawLine(x1, y1, x2, y2, color);
lelect 0:3e9c32359703 268 drawLine(x2, y2, x0, y0, color);
lelect 0:3e9c32359703 269 }
lelect 0:3e9c32359703 270
lelect 0:3e9c32359703 271 // Fill a triangle
lelect 0:3e9c32359703 272 void Adafruit_GFX::fillTriangle ( int16_t x0, int16_t y0,
lelect 0:3e9c32359703 273 int16_t x1, int16_t y1,
lelect 0:3e9c32359703 274 int16_t x2, int16_t y2, uint16_t color)
lelect 0:3e9c32359703 275 {
lelect 0:3e9c32359703 276
lelect 0:3e9c32359703 277 int16_t a, b, y, last;
lelect 0:3e9c32359703 278
lelect 0:3e9c32359703 279 // Sort coordinates by Y order (y2 >= y1 >= y0)
lelect 0:3e9c32359703 280 if (y0 > y1) {
lelect 0:3e9c32359703 281 swap(y0, y1);
lelect 0:3e9c32359703 282 swap(x0, x1);
lelect 0:3e9c32359703 283 }
lelect 0:3e9c32359703 284 if (y1 > y2) {
lelect 0:3e9c32359703 285 swap(y2, y1);
lelect 0:3e9c32359703 286 swap(x2, x1);
lelect 0:3e9c32359703 287 }
lelect 0:3e9c32359703 288 if (y0 > y1) {
lelect 0:3e9c32359703 289 swap(y0, y1);
lelect 0:3e9c32359703 290 swap(x0, x1);
lelect 0:3e9c32359703 291 }
lelect 0:3e9c32359703 292
lelect 0:3e9c32359703 293 if(y0 == y2) { // Handle awkward all-on-same-line case as its own thing
lelect 0:3e9c32359703 294 a = b = x0;
lelect 0:3e9c32359703 295 if(x1 < a) a = x1;
lelect 0:3e9c32359703 296 else if(x1 > b) b = x1;
lelect 0:3e9c32359703 297 if(x2 < a) a = x2;
lelect 0:3e9c32359703 298 else if(x2 > b) b = x2;
lelect 0:3e9c32359703 299 drawFastHLine(a, y0, b-a+1, color);
lelect 0:3e9c32359703 300 return;
lelect 0:3e9c32359703 301 }
lelect 0:3e9c32359703 302
lelect 0:3e9c32359703 303 int16_t
lelect 0:3e9c32359703 304 dx01 = x1 - x0,
lelect 0:3e9c32359703 305 dy01 = y1 - y0,
lelect 0:3e9c32359703 306 dx02 = x2 - x0,
lelect 0:3e9c32359703 307 dy02 = y2 - y0,
lelect 0:3e9c32359703 308 dx12 = x2 - x1,
lelect 0:3e9c32359703 309 dy12 = y2 - y1,
lelect 0:3e9c32359703 310 sa = 0,
lelect 0:3e9c32359703 311 sb = 0;
lelect 0:3e9c32359703 312
lelect 0:3e9c32359703 313 // For upper part of triangle, find scanline crossings for segments
lelect 0:3e9c32359703 314 // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
lelect 0:3e9c32359703 315 // is included here (and second loop will be skipped, avoiding a /0
lelect 0:3e9c32359703 316 // error there), otherwise scanline y1 is skipped here and handled
lelect 0:3e9c32359703 317 // in the second loop...which also avoids a /0 error here if y0=y1
lelect 0:3e9c32359703 318 // (flat-topped triangle).
lelect 0:3e9c32359703 319 if(y1 == y2) last = y1; // Include y1 scanline
lelect 0:3e9c32359703 320 else last = y1-1; // Skip it
lelect 0:3e9c32359703 321
lelect 0:3e9c32359703 322 for(y=y0; y<=last; y++) {
lelect 0:3e9c32359703 323 a = x0 + sa / dy01;
lelect 0:3e9c32359703 324 b = x0 + sb / dy02;
lelect 0:3e9c32359703 325 sa += dx01;
lelect 0:3e9c32359703 326 sb += dx02;
lelect 0:3e9c32359703 327 /* longhand:
lelect 0:3e9c32359703 328 a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
lelect 0:3e9c32359703 329 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
lelect 0:3e9c32359703 330 */
lelect 0:3e9c32359703 331 if(a > b) swap(a,b);
lelect 0:3e9c32359703 332 drawFastHLine(a, y, b-a+1, color);
lelect 0:3e9c32359703 333 }
lelect 0:3e9c32359703 334
lelect 0:3e9c32359703 335 // For lower part of triangle, find scanline crossings for segments
lelect 0:3e9c32359703 336 // 0-2 and 1-2. This loop is skipped if y1=y2.
lelect 0:3e9c32359703 337 sa = dx12 * (y - y1);
lelect 0:3e9c32359703 338 sb = dx02 * (y - y0);
lelect 0:3e9c32359703 339 for(; y<=y2; y++) {
lelect 0:3e9c32359703 340 a = x1 + sa / dy12;
lelect 0:3e9c32359703 341 b = x0 + sb / dy02;
lelect 0:3e9c32359703 342 sa += dx12;
lelect 0:3e9c32359703 343 sb += dx02;
lelect 0:3e9c32359703 344 /* longhand:
lelect 0:3e9c32359703 345 a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
lelect 0:3e9c32359703 346 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
lelect 0:3e9c32359703 347 */
lelect 0:3e9c32359703 348 if(a > b) swap(a,b);
lelect 0:3e9c32359703 349 drawFastHLine(a, y, b-a+1, color);
lelect 0:3e9c32359703 350 }
lelect 0:3e9c32359703 351 }
lelect 0:3e9c32359703 352
lelect 0:3e9c32359703 353 void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color)
lelect 0:3e9c32359703 354 {
lelect 0:3e9c32359703 355 int16_t i, j;
lelect 0:3e9c32359703 356 for(j=0; j<h; j++) {
lelect 0:3e9c32359703 357 for(i=0; i<w; i++ ) {
lelect 0:3e9c32359703 358 if(bitmap[i+(j/8)*w]& _BV(j%8) )
lelect 0:3e9c32359703 359 drawPixel(x+i, y+j, color);
lelect 0:3e9c32359703 360 }
lelect 0:3e9c32359703 361 }
lelect 0:3e9c32359703 362 }
lelect 0:3e9c32359703 363
lelect 0:3e9c32359703 364 size_t Adafruit_GFX::writeChar(uint8_t c)
lelect 0:3e9c32359703 365 {
lelect 0:3e9c32359703 366 if (c == '\n') {
lelect 0:3e9c32359703 367 cursor_y += textsize*8;
lelect 0:3e9c32359703 368 cursor_x = 0;
lelect 0:3e9c32359703 369 } else if (c == '\r') {
lelect 0:3e9c32359703 370 cursor_x = 0;
lelect 0:3e9c32359703 371 } else {
lelect 0:3e9c32359703 372 drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
lelect 0:3e9c32359703 373 cursor_x += textsize*6;
lelect 0:3e9c32359703 374 if (wrap && (cursor_x > (_width - textsize*6))) {
lelect 0:3e9c32359703 375 cursor_y += textsize*8;
lelect 0:3e9c32359703 376 cursor_x = 0;
lelect 0:3e9c32359703 377 }
lelect 0:3e9c32359703 378 }
lelect 0:3e9c32359703 379 return 1;
lelect 0:3e9c32359703 380 }
lelect 0:3e9c32359703 381
lelect 0:3e9c32359703 382 // Draw a character
lelect 0:3e9c32359703 383 void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
lelect 0:3e9c32359703 384 {
lelect 0:3e9c32359703 385 if((x >= _width)|| // Clip right
lelect 0:3e9c32359703 386 (y >= _height)|| // Clip bottom
lelect 0:3e9c32359703 387 ((x + 6 * size - 1) < 0) || // Clip left
lelect 0:3e9c32359703 388 ((y + 8 * size - 1) < 0))// Clip top
lelect 0:3e9c32359703 389 return;
lelect 0:3e9c32359703 390
lelect 0:3e9c32359703 391 for (int8_t i=0; i<6; i++ ) {
lelect 0:3e9c32359703 392 uint8_t line;
lelect 0:3e9c32359703 393 if (i == 5)
lelect 0:3e9c32359703 394 line = 0x0;
lelect 0:3e9c32359703 395 else
lelect 0:3e9c32359703 396 line = font[(c*5)+i];
lelect 0:3e9c32359703 397 for (int8_t j = 0; j<8; j++) {
lelect 0:3e9c32359703 398 if (line & 0x1) {
lelect 0:3e9c32359703 399 if (size == 1) // default size
lelect 0:3e9c32359703 400 drawPixel(x+i, y+j, color);
lelect 0:3e9c32359703 401 else { // big size
lelect 0:3e9c32359703 402 fillRect(x+(i*size), y+(j*size), size, size, color);
lelect 0:3e9c32359703 403 }
lelect 0:3e9c32359703 404 } else if (bg != color) {
lelect 0:3e9c32359703 405 if (size == 1) // default size
lelect 0:3e9c32359703 406 drawPixel(x+i, y+j, bg);
lelect 0:3e9c32359703 407 else { // big size
lelect 0:3e9c32359703 408 fillRect(x+i*size, y+j*size, size, size, bg);
lelect 0:3e9c32359703 409 }
lelect 0:3e9c32359703 410 }
lelect 0:3e9c32359703 411 line >>= 1;
lelect 0:3e9c32359703 412 }
lelect 0:3e9c32359703 413 }
lelect 0:3e9c32359703 414 }
lelect 0:3e9c32359703 415
lelect 0:3e9c32359703 416
lelect 0:3e9c32359703 417 void Adafruit_GFX::invertDisplay(bool i)
lelect 0:3e9c32359703 418 {
lelect 0:3e9c32359703 419 // Do nothing, must be subclassed if supported
lelect 0:3e9c32359703 420 }