EmbeddedArtists AB / EALib

A library with drivers for different peripherals on the LPC4088 QuickStart Board or related add-on boards.

Dependencies:   FATFileSystem

Dependents:   LPC4088test LPC4088test_ledonly LPC4088test_deleteall LPC4088_RAMtest ... more

Adafruit_GFX.cpp@20:e1e36493f347, 2015-06-10 (annotated)

Committer:
embeddedartists
Date:
Wed Jun 10 08:34:09 2015 +0000
Revision:
20:e1e36493f347
Parent:
0:0fdadbc3d852 
Fixed compiler error in MCIFileSystem regarding us_ticker_api.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 0:0fdadbc3d852 1 /*
embeddedartists 0:0fdadbc3d852 2 This is the core graphics library for all our displays, providing a common
embeddedartists 0:0fdadbc3d852 3 set of graphics primitives (points, lines, circles, etc.). It needs to be
embeddedartists 0:0fdadbc3d852 4 paired with a hardware-specific library for each display device we carry
embeddedartists 0:0fdadbc3d852 5 (to handle the lower-level functions).
embeddedartists 0:0fdadbc3d852 6
embeddedartists 0:0fdadbc3d852 7 Adafruit invests time and resources providing this open source code, please
embeddedartists 0:0fdadbc3d852 8 support Adafruit & open-source hardware by purchasing products from Adafruit!
embeddedartists 0:0fdadbc3d852 9
embeddedartists 0:0fdadbc3d852 10 Copyright (c) 2013 Adafruit Industries. All rights reserved.
embeddedartists 0:0fdadbc3d852 11
embeddedartists 0:0fdadbc3d852 12 Redistribution and use in source and binary forms, with or without
embeddedartists 0:0fdadbc3d852 13 modification, are permitted provided that the following conditions are met:
embeddedartists 0:0fdadbc3d852 14
embeddedartists 0:0fdadbc3d852 15 - Redistributions of source code must retain the above copyright notice,
embeddedartists 0:0fdadbc3d852 16 this list of conditions and the following disclaimer.
embeddedartists 0:0fdadbc3d852 17 - Redistributions in binary form must reproduce the above copyright notice,
embeddedartists 0:0fdadbc3d852 18 this list of conditions and the following disclaimer in the documentation
embeddedartists 0:0fdadbc3d852 19 and/or other materials provided with the distribution.
embeddedartists 0:0fdadbc3d852 20
embeddedartists 0:0fdadbc3d852 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
embeddedartists 0:0fdadbc3d852 22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
embeddedartists 0:0fdadbc3d852 23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
embeddedartists 0:0fdadbc3d852 24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
embeddedartists 0:0fdadbc3d852 25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
embeddedartists 0:0fdadbc3d852 26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
embeddedartists 0:0fdadbc3d852 27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
embeddedartists 0:0fdadbc3d852 28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
embeddedartists 0:0fdadbc3d852 29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
embeddedartists 0:0fdadbc3d852 30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
embeddedartists 0:0fdadbc3d852 31 POSSIBILITY OF SUCH DAMAGE.
embeddedartists 0:0fdadbc3d852 32 */
embeddedartists 0:0fdadbc3d852 33
embeddedartists 0:0fdadbc3d852 34 #include "mbed.h"
embeddedartists 0:0fdadbc3d852 35 #include "Adafruit_GFX.h"
embeddedartists 0:0fdadbc3d852 36 #include "glcdfont.c"
embeddedartists 0:0fdadbc3d852 37 #ifdef __AVR__
embeddedartists 0:0fdadbc3d852 38 #include <avr/pgmspace.h>
embeddedartists 0:0fdadbc3d852 39 #else
embeddedartists 0:0fdadbc3d852 40 #define pgm_read_byte(addr) (*(const unsigned char *)(addr))
embeddedartists 0:0fdadbc3d852 41 #endif
embeddedartists 0:0fdadbc3d852 42
embeddedartists 0:0fdadbc3d852 43 Adafruit_GFX::Adafruit_GFX(int16_t w, int16_t h):
embeddedartists 0:0fdadbc3d852 44 WIDTH(w), HEIGHT(h)
embeddedartists 0:0fdadbc3d852 45 {
embeddedartists 0:0fdadbc3d852 46 _width = WIDTH;
embeddedartists 0:0fdadbc3d852 47 _height = HEIGHT;
embeddedartists 0:0fdadbc3d852 48 rotation = 0;
embeddedartists 0:0fdadbc3d852 49 cursor_y = cursor_x = 0;
embeddedartists 0:0fdadbc3d852 50 textsize = 1;
embeddedartists 0:0fdadbc3d852 51 textcolor = textbgcolor = 0xFFFF;
embeddedartists 0:0fdadbc3d852 52 wrap = true;
embeddedartists 0:0fdadbc3d852 53 }
embeddedartists 0:0fdadbc3d852 54
embeddedartists 0:0fdadbc3d852 55 // Draw a circle outline
embeddedartists 0:0fdadbc3d852 56 void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r,
embeddedartists 0:0fdadbc3d852 57 uint16_t color) {
embeddedartists 0:0fdadbc3d852 58 int16_t f = 1 - r;
embeddedartists 0:0fdadbc3d852 59 int16_t ddF_x = 1;
embeddedartists 0:0fdadbc3d852 60 int16_t ddF_y = -2 * r;
embeddedartists 0:0fdadbc3d852 61 int16_t x = 0;
embeddedartists 0:0fdadbc3d852 62 int16_t y = r;
embeddedartists 0:0fdadbc3d852 63
embeddedartists 0:0fdadbc3d852 64 drawPixel(x0 , y0+r, color);
embeddedartists 0:0fdadbc3d852 65 drawPixel(x0 , y0-r, color);
embeddedartists 0:0fdadbc3d852 66 drawPixel(x0+r, y0 , color);
embeddedartists 0:0fdadbc3d852 67 drawPixel(x0-r, y0 , color);
embeddedartists 0:0fdadbc3d852 68
embeddedartists 0:0fdadbc3d852 69 while (x<y) {
embeddedartists 0:0fdadbc3d852 70 if (f >= 0) {
embeddedartists 0:0fdadbc3d852 71 y--;
embeddedartists 0:0fdadbc3d852 72 ddF_y += 2;
embeddedartists 0:0fdadbc3d852 73 f += ddF_y;
embeddedartists 0:0fdadbc3d852 74 }
embeddedartists 0:0fdadbc3d852 75 x++;
embeddedartists 0:0fdadbc3d852 76 ddF_x += 2;
embeddedartists 0:0fdadbc3d852 77 f += ddF_x;
embeddedartists 0:0fdadbc3d852 78
embeddedartists 0:0fdadbc3d852 79 drawPixel(x0 + x, y0 + y, color);
embeddedartists 0:0fdadbc3d852 80 drawPixel(x0 - x, y0 + y, color);
embeddedartists 0:0fdadbc3d852 81 drawPixel(x0 + x, y0 - y, color);
embeddedartists 0:0fdadbc3d852 82 drawPixel(x0 - x, y0 - y, color);
embeddedartists 0:0fdadbc3d852 83 drawPixel(x0 + y, y0 + x, color);
embeddedartists 0:0fdadbc3d852 84 drawPixel(x0 - y, y0 + x, color);
embeddedartists 0:0fdadbc3d852 85 drawPixel(x0 + y, y0 - x, color);
embeddedartists 0:0fdadbc3d852 86 drawPixel(x0 - y, y0 - x, color);
embeddedartists 0:0fdadbc3d852 87 }
embeddedartists 0:0fdadbc3d852 88 }
embeddedartists 0:0fdadbc3d852 89
embeddedartists 0:0fdadbc3d852 90 void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0,
embeddedartists 0:0fdadbc3d852 91 int16_t r, uint8_t cornername, uint16_t color) {
embeddedartists 0:0fdadbc3d852 92 int16_t f = 1 - r;
embeddedartists 0:0fdadbc3d852 93 int16_t ddF_x = 1;
embeddedartists 0:0fdadbc3d852 94 int16_t ddF_y = -2 * r;
embeddedartists 0:0fdadbc3d852 95 int16_t x = 0;
embeddedartists 0:0fdadbc3d852 96 int16_t y = r;
embeddedartists 0:0fdadbc3d852 97
embeddedartists 0:0fdadbc3d852 98 while (x<y) {
embeddedartists 0:0fdadbc3d852 99 if (f >= 0) {
embeddedartists 0:0fdadbc3d852 100 y--;
embeddedartists 0:0fdadbc3d852 101 ddF_y += 2;
embeddedartists 0:0fdadbc3d852 102 f += ddF_y;
embeddedartists 0:0fdadbc3d852 103 }
embeddedartists 0:0fdadbc3d852 104 x++;
embeddedartists 0:0fdadbc3d852 105 ddF_x += 2;
embeddedartists 0:0fdadbc3d852 106 f += ddF_x;
embeddedartists 0:0fdadbc3d852 107 if (cornername & 0x4) {
embeddedartists 0:0fdadbc3d852 108 drawPixel(x0 + x, y0 + y, color);
embeddedartists 0:0fdadbc3d852 109 drawPixel(x0 + y, y0 + x, color);
embeddedartists 0:0fdadbc3d852 110 }
embeddedartists 0:0fdadbc3d852 111 if (cornername & 0x2) {
embeddedartists 0:0fdadbc3d852 112 drawPixel(x0 + x, y0 - y, color);
embeddedartists 0:0fdadbc3d852 113 drawPixel(x0 + y, y0 - x, color);
embeddedartists 0:0fdadbc3d852 114 }
embeddedartists 0:0fdadbc3d852 115 if (cornername & 0x8) {
embeddedartists 0:0fdadbc3d852 116 drawPixel(x0 - y, y0 + x, color);
embeddedartists 0:0fdadbc3d852 117 drawPixel(x0 - x, y0 + y, color);
embeddedartists 0:0fdadbc3d852 118 }
embeddedartists 0:0fdadbc3d852 119 if (cornername & 0x1) {
embeddedartists 0:0fdadbc3d852 120 drawPixel(x0 - y, y0 - x, color);
embeddedartists 0:0fdadbc3d852 121 drawPixel(x0 - x, y0 - y, color);
embeddedartists 0:0fdadbc3d852 122 }
embeddedartists 0:0fdadbc3d852 123 }
embeddedartists 0:0fdadbc3d852 124 }
embeddedartists 0:0fdadbc3d852 125
embeddedartists 0:0fdadbc3d852 126 void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r,
embeddedartists 0:0fdadbc3d852 127 uint16_t color) {
embeddedartists 0:0fdadbc3d852 128 drawFastVLine(x0, y0-r, 2*r+1, color);
embeddedartists 0:0fdadbc3d852 129 fillCircleHelper(x0, y0, r, 3, 0, color);
embeddedartists 0:0fdadbc3d852 130 }
embeddedartists 0:0fdadbc3d852 131
embeddedartists 0:0fdadbc3d852 132 // Used to do circles and roundrects
embeddedartists 0:0fdadbc3d852 133 void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r,
embeddedartists 0:0fdadbc3d852 134 uint8_t cornername, int16_t delta, uint16_t color) {
embeddedartists 0:0fdadbc3d852 135
embeddedartists 0:0fdadbc3d852 136 int16_t f = 1 - r;
embeddedartists 0:0fdadbc3d852 137 int16_t ddF_x = 1;
embeddedartists 0:0fdadbc3d852 138 int16_t ddF_y = -2 * r;
embeddedartists 0:0fdadbc3d852 139 int16_t x = 0;
embeddedartists 0:0fdadbc3d852 140 int16_t y = r;
embeddedartists 0:0fdadbc3d852 141
embeddedartists 0:0fdadbc3d852 142 while (x<y) {
embeddedartists 0:0fdadbc3d852 143 if (f >= 0) {
embeddedartists 0:0fdadbc3d852 144 y--;
embeddedartists 0:0fdadbc3d852 145 ddF_y += 2;
embeddedartists 0:0fdadbc3d852 146 f += ddF_y;
embeddedartists 0:0fdadbc3d852 147 }
embeddedartists 0:0fdadbc3d852 148 x++;
embeddedartists 0:0fdadbc3d852 149 ddF_x += 2;
embeddedartists 0:0fdadbc3d852 150 f += ddF_x;
embeddedartists 0:0fdadbc3d852 151
embeddedartists 0:0fdadbc3d852 152 if (cornername & 0x1) {
embeddedartists 0:0fdadbc3d852 153 drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
embeddedartists 0:0fdadbc3d852 154 drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
embeddedartists 0:0fdadbc3d852 155 }
embeddedartists 0:0fdadbc3d852 156 if (cornername & 0x2) {
embeddedartists 0:0fdadbc3d852 157 drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
embeddedartists 0:0fdadbc3d852 158 drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
embeddedartists 0:0fdadbc3d852 159 }
embeddedartists 0:0fdadbc3d852 160 }
embeddedartists 0:0fdadbc3d852 161 }
embeddedartists 0:0fdadbc3d852 162
embeddedartists 0:0fdadbc3d852 163 // Bresenham's algorithm - thx wikpedia
embeddedartists 0:0fdadbc3d852 164 void Adafruit_GFX::drawLine(int16_t x0, int16_t y0,
embeddedartists 0:0fdadbc3d852 165 int16_t x1, int16_t y1,
embeddedartists 0:0fdadbc3d852 166 uint16_t color) {
embeddedartists 0:0fdadbc3d852 167 int16_t steep = abs(y1 - y0) > abs(x1 - x0);
embeddedartists 0:0fdadbc3d852 168 if (steep) {
embeddedartists 0:0fdadbc3d852 169 swap(x0, y0);
embeddedartists 0:0fdadbc3d852 170 swap(x1, y1);
embeddedartists 0:0fdadbc3d852 171 }
embeddedartists 0:0fdadbc3d852 172
embeddedartists 0:0fdadbc3d852 173 if (x0 > x1) {
embeddedartists 0:0fdadbc3d852 174 swap(x0, x1);
embeddedartists 0:0fdadbc3d852 175 swap(y0, y1);
embeddedartists 0:0fdadbc3d852 176 }
embeddedartists 0:0fdadbc3d852 177
embeddedartists 0:0fdadbc3d852 178 int16_t dx, dy;
embeddedartists 0:0fdadbc3d852 179 dx = x1 - x0;
embeddedartists 0:0fdadbc3d852 180 dy = abs(y1 - y0);
embeddedartists 0:0fdadbc3d852 181
embeddedartists 0:0fdadbc3d852 182 int16_t err = dx / 2;
embeddedartists 0:0fdadbc3d852 183 int16_t ystep;
embeddedartists 0:0fdadbc3d852 184
embeddedartists 0:0fdadbc3d852 185 if (y0 < y1) {
embeddedartists 0:0fdadbc3d852 186 ystep = 1;
embeddedartists 0:0fdadbc3d852 187 } else {
embeddedartists 0:0fdadbc3d852 188 ystep = -1;
embeddedartists 0:0fdadbc3d852 189 }
embeddedartists 0:0fdadbc3d852 190
embeddedartists 0:0fdadbc3d852 191 for (; x0<=x1; x0++) {
embeddedartists 0:0fdadbc3d852 192 if (steep) {
embeddedartists 0:0fdadbc3d852 193 drawPixel(y0, x0, color);
embeddedartists 0:0fdadbc3d852 194 } else {
embeddedartists 0:0fdadbc3d852 195 drawPixel(x0, y0, color);
embeddedartists 0:0fdadbc3d852 196 }
embeddedartists 0:0fdadbc3d852 197 err -= dy;
embeddedartists 0:0fdadbc3d852 198 if (err < 0) {
embeddedartists 0:0fdadbc3d852 199 y0 += ystep;
embeddedartists 0:0fdadbc3d852 200 err += dx;
embeddedartists 0:0fdadbc3d852 201 }
embeddedartists 0:0fdadbc3d852 202 }
embeddedartists 0:0fdadbc3d852 203 }
embeddedartists 0:0fdadbc3d852 204
embeddedartists 0:0fdadbc3d852 205 // Draw a rectangle
embeddedartists 0:0fdadbc3d852 206 void Adafruit_GFX::drawRect(int16_t x, int16_t y,
embeddedartists 0:0fdadbc3d852 207 int16_t w, int16_t h,
embeddedartists 0:0fdadbc3d852 208 uint16_t color) {
embeddedartists 0:0fdadbc3d852 209 drawFastHLine(x, y, w, color);
embeddedartists 0:0fdadbc3d852 210 drawFastHLine(x, y+h-1, w, color);
embeddedartists 0:0fdadbc3d852 211 drawFastVLine(x, y, h, color);
embeddedartists 0:0fdadbc3d852 212 drawFastVLine(x+w-1, y, h, color);
embeddedartists 0:0fdadbc3d852 213 }
embeddedartists 0:0fdadbc3d852 214
embeddedartists 0:0fdadbc3d852 215 void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y,
embeddedartists 0:0fdadbc3d852 216 int16_t h, uint16_t color) {
embeddedartists 0:0fdadbc3d852 217 // Update in subclasses if desired!
embeddedartists 0:0fdadbc3d852 218 drawLine(x, y, x, y+h-1, color);
embeddedartists 0:0fdadbc3d852 219 }
embeddedartists 0:0fdadbc3d852 220
embeddedartists 0:0fdadbc3d852 221 void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y,
embeddedartists 0:0fdadbc3d852 222 int16_t w, uint16_t color) {
embeddedartists 0:0fdadbc3d852 223 // Update in subclasses if desired!
embeddedartists 0:0fdadbc3d852 224 drawLine(x, y, x+w-1, y, color);
embeddedartists 0:0fdadbc3d852 225 }
embeddedartists 0:0fdadbc3d852 226
embeddedartists 0:0fdadbc3d852 227 void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
embeddedartists 0:0fdadbc3d852 228 uint16_t color) {
embeddedartists 0:0fdadbc3d852 229 // Update in subclasses if desired!
embeddedartists 0:0fdadbc3d852 230 for (int16_t i=x; i<x+w; i++) {
embeddedartists 0:0fdadbc3d852 231 drawFastVLine(i, y, h, color);
embeddedartists 0:0fdadbc3d852 232 }
embeddedartists 0:0fdadbc3d852 233 }
embeddedartists 0:0fdadbc3d852 234
embeddedartists 0:0fdadbc3d852 235 void Adafruit_GFX::fillScreen(uint16_t color) {
embeddedartists 0:0fdadbc3d852 236 fillRect(0, 0, _width, _height, color);
embeddedartists 0:0fdadbc3d852 237 }
embeddedartists 0:0fdadbc3d852 238
embeddedartists 0:0fdadbc3d852 239 // Draw a rounded rectangle
embeddedartists 0:0fdadbc3d852 240 void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w,
embeddedartists 0:0fdadbc3d852 241 int16_t h, int16_t r, uint16_t color) {
embeddedartists 0:0fdadbc3d852 242 // smarter version
embeddedartists 0:0fdadbc3d852 243 drawFastHLine(x+r , y , w-2*r, color); // Top
embeddedartists 0:0fdadbc3d852 244 drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
embeddedartists 0:0fdadbc3d852 245 drawFastVLine(x , y+r , h-2*r, color); // Left
embeddedartists 0:0fdadbc3d852 246 drawFastVLine(x+w-1, y+r , h-2*r, color); // Right
embeddedartists 0:0fdadbc3d852 247 // draw four corners
embeddedartists 0:0fdadbc3d852 248 drawCircleHelper(x+r , y+r , r, 1, color);
embeddedartists 0:0fdadbc3d852 249 drawCircleHelper(x+w-r-1, y+r , r, 2, color);
embeddedartists 0:0fdadbc3d852 250 drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
embeddedartists 0:0fdadbc3d852 251 drawCircleHelper(x+r , y+h-r-1, r, 8, color);
embeddedartists 0:0fdadbc3d852 252 }
embeddedartists 0:0fdadbc3d852 253
embeddedartists 0:0fdadbc3d852 254 // Fill a rounded rectangle
embeddedartists 0:0fdadbc3d852 255 void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w,
embeddedartists 0:0fdadbc3d852 256 int16_t h, int16_t r, uint16_t color) {
embeddedartists 0:0fdadbc3d852 257 // smarter version
embeddedartists 0:0fdadbc3d852 258 fillRect(x+r, y, w-2*r, h, color);
embeddedartists 0:0fdadbc3d852 259
embeddedartists 0:0fdadbc3d852 260 // draw four corners
embeddedartists 0:0fdadbc3d852 261 fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
embeddedartists 0:0fdadbc3d852 262 fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
embeddedartists 0:0fdadbc3d852 263 }
embeddedartists 0:0fdadbc3d852 264
embeddedartists 0:0fdadbc3d852 265 // Draw a triangle
embeddedartists 0:0fdadbc3d852 266 void Adafruit_GFX::drawTriangle(int16_t x0, int16_t y0,
embeddedartists 0:0fdadbc3d852 267 int16_t x1, int16_t y1,
embeddedartists 0:0fdadbc3d852 268 int16_t x2, int16_t y2, uint16_t color) {
embeddedartists 0:0fdadbc3d852 269 drawLine(x0, y0, x1, y1, color);
embeddedartists 0:0fdadbc3d852 270 drawLine(x1, y1, x2, y2, color);
embeddedartists 0:0fdadbc3d852 271 drawLine(x2, y2, x0, y0, color);
embeddedartists 0:0fdadbc3d852 272 }
embeddedartists 0:0fdadbc3d852 273
embeddedartists 0:0fdadbc3d852 274 // Fill a triangle
embeddedartists 0:0fdadbc3d852 275 void Adafruit_GFX::fillTriangle ( int16_t x0, int16_t y0,
embeddedartists 0:0fdadbc3d852 276 int16_t x1, int16_t y1,
embeddedartists 0:0fdadbc3d852 277 int16_t x2, int16_t y2, uint16_t color) {
embeddedartists 0:0fdadbc3d852 278
embeddedartists 0:0fdadbc3d852 279 int16_t a, b, y, last;
embeddedartists 0:0fdadbc3d852 280
embeddedartists 0:0fdadbc3d852 281 // Sort coordinates by Y order (y2 >= y1 >= y0)
embeddedartists 0:0fdadbc3d852 282 if (y0 > y1) {
embeddedartists 0:0fdadbc3d852 283 swap(y0, y1); swap(x0, x1);
embeddedartists 0:0fdadbc3d852 284 }
embeddedartists 0:0fdadbc3d852 285 if (y1 > y2) {
embeddedartists 0:0fdadbc3d852 286 swap(y2, y1); swap(x2, x1);
embeddedartists 0:0fdadbc3d852 287 }
embeddedartists 0:0fdadbc3d852 288 if (y0 > y1) {
embeddedartists 0:0fdadbc3d852 289 swap(y0, y1); swap(x0, x1);
embeddedartists 0:0fdadbc3d852 290 }
embeddedartists 0:0fdadbc3d852 291
embeddedartists 0:0fdadbc3d852 292 if(y0 == y2) { // Handle awkward all-on-same-line case as its own thing
embeddedartists 0:0fdadbc3d852 293 a = b = x0;
embeddedartists 0:0fdadbc3d852 294 if(x1 < a) a = x1;
embeddedartists 0:0fdadbc3d852 295 else if(x1 > b) b = x1;
embeddedartists 0:0fdadbc3d852 296 if(x2 < a) a = x2;
embeddedartists 0:0fdadbc3d852 297 else if(x2 > b) b = x2;
embeddedartists 0:0fdadbc3d852 298 drawFastHLine(a, y0, b-a+1, color);
embeddedartists 0:0fdadbc3d852 299 return;
embeddedartists 0:0fdadbc3d852 300 }
embeddedartists 0:0fdadbc3d852 301
embeddedartists 0:0fdadbc3d852 302 int16_t
embeddedartists 0:0fdadbc3d852 303 dx01 = x1 - x0,
embeddedartists 0:0fdadbc3d852 304 dy01 = y1 - y0,
embeddedartists 0:0fdadbc3d852 305 dx02 = x2 - x0,
embeddedartists 0:0fdadbc3d852 306 dy02 = y2 - y0,
embeddedartists 0:0fdadbc3d852 307 dx12 = x2 - x1,
embeddedartists 0:0fdadbc3d852 308 dy12 = y2 - y1,
embeddedartists 0:0fdadbc3d852 309 sa = 0,
embeddedartists 0:0fdadbc3d852 310 sb = 0;
embeddedartists 0:0fdadbc3d852 311
embeddedartists 0:0fdadbc3d852 312 // For upper part of triangle, find scanline crossings for segments
embeddedartists 0:0fdadbc3d852 313 // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
embeddedartists 0:0fdadbc3d852 314 // is included here (and second loop will be skipped, avoiding a /0
embeddedartists 0:0fdadbc3d852 315 // error there), otherwise scanline y1 is skipped here and handled
embeddedartists 0:0fdadbc3d852 316 // in the second loop...which also avoids a /0 error here if y0=y1
embeddedartists 0:0fdadbc3d852 317 // (flat-topped triangle).
embeddedartists 0:0fdadbc3d852 318 if(y1 == y2) last = y1; // Include y1 scanline
embeddedartists 0:0fdadbc3d852 319 else last = y1-1; // Skip it
embeddedartists 0:0fdadbc3d852 320
embeddedartists 0:0fdadbc3d852 321 for(y=y0; y<=last; y++) {
embeddedartists 0:0fdadbc3d852 322 a = x0 + sa / dy01;
embeddedartists 0:0fdadbc3d852 323 b = x0 + sb / dy02;
embeddedartists 0:0fdadbc3d852 324 sa += dx01;
embeddedartists 0:0fdadbc3d852 325 sb += dx02;
embeddedartists 0:0fdadbc3d852 326 /* longhand:
embeddedartists 0:0fdadbc3d852 327 a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
embeddedartists 0:0fdadbc3d852 328 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
embeddedartists 0:0fdadbc3d852 329 */
embeddedartists 0:0fdadbc3d852 330 if(a > b) swap(a,b);
embeddedartists 0:0fdadbc3d852 331 drawFastHLine(a, y, b-a+1, color);
embeddedartists 0:0fdadbc3d852 332 }
embeddedartists 0:0fdadbc3d852 333
embeddedartists 0:0fdadbc3d852 334 // For lower part of triangle, find scanline crossings for segments
embeddedartists 0:0fdadbc3d852 335 // 0-2 and 1-2. This loop is skipped if y1=y2.
embeddedartists 0:0fdadbc3d852 336 sa = dx12 * (y - y1);
embeddedartists 0:0fdadbc3d852 337 sb = dx02 * (y - y0);
embeddedartists 0:0fdadbc3d852 338 for(; y<=y2; y++) {
embeddedartists 0:0fdadbc3d852 339 a = x1 + sa / dy12;
embeddedartists 0:0fdadbc3d852 340 b = x0 + sb / dy02;
embeddedartists 0:0fdadbc3d852 341 sa += dx12;
embeddedartists 0:0fdadbc3d852 342 sb += dx02;
embeddedartists 0:0fdadbc3d852 343 /* longhand:
embeddedartists 0:0fdadbc3d852 344 a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
embeddedartists 0:0fdadbc3d852 345 b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
embeddedartists 0:0fdadbc3d852 346 */
embeddedartists 0:0fdadbc3d852 347 if(a > b) swap(a,b);
embeddedartists 0:0fdadbc3d852 348 drawFastHLine(a, y, b-a+1, color);
embeddedartists 0:0fdadbc3d852 349 }
embeddedartists 0:0fdadbc3d852 350 }
embeddedartists 0:0fdadbc3d852 351
embeddedartists 0:0fdadbc3d852 352 void Adafruit_GFX::drawBitmap(int16_t x, int16_t y,
embeddedartists 0:0fdadbc3d852 353 const uint8_t *bitmap, int16_t w, int16_t h,
embeddedartists 0:0fdadbc3d852 354 uint16_t color) {
embeddedartists 0:0fdadbc3d852 355
embeddedartists 0:0fdadbc3d852 356 int16_t i, j, byteWidth = (w + 7) / 8;
embeddedartists 0:0fdadbc3d852 357
embeddedartists 0:0fdadbc3d852 358 for(j=0; j<h; j++) {
embeddedartists 0:0fdadbc3d852 359 for(i=0; i<w; i++ ) {
embeddedartists 0:0fdadbc3d852 360 if(pgm_read_byte(bitmap + j * byteWidth + i / 8) & (128 >> (i & 7))) {
embeddedartists 0:0fdadbc3d852 361 drawPixel(x+i, y+j, color);
embeddedartists 0:0fdadbc3d852 362 }
embeddedartists 0:0fdadbc3d852 363 }
embeddedartists 0:0fdadbc3d852 364 }
embeddedartists 0:0fdadbc3d852 365 }
embeddedartists 0:0fdadbc3d852 366
embeddedartists 0:0fdadbc3d852 367
embeddedartists 0:0fdadbc3d852 368 size_t Adafruit_GFX::write(uint8_t c) {
embeddedartists 0:0fdadbc3d852 369 if (c == '\n') {
embeddedartists 0:0fdadbc3d852 370 cursor_y += textsize*8;
embeddedartists 0:0fdadbc3d852 371 cursor_x = 0;
embeddedartists 0:0fdadbc3d852 372 } else if (c == '\r') {
embeddedartists 0:0fdadbc3d852 373 // skip em
embeddedartists 0:0fdadbc3d852 374 } else {
embeddedartists 0:0fdadbc3d852 375 drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
embeddedartists 0:0fdadbc3d852 376 cursor_x += textsize*6;
embeddedartists 0:0fdadbc3d852 377 if (wrap && (cursor_x > (_width - textsize*6))) {
embeddedartists 0:0fdadbc3d852 378 cursor_y += textsize*8;
embeddedartists 0:0fdadbc3d852 379 cursor_x = 0;
embeddedartists 0:0fdadbc3d852 380 }
embeddedartists 0:0fdadbc3d852 381 }
embeddedartists 0:0fdadbc3d852 382
embeddedartists 0:0fdadbc3d852 383 return 1;
embeddedartists 0:0fdadbc3d852 384
embeddedartists 0:0fdadbc3d852 385 }
embeddedartists 0:0fdadbc3d852 386
embeddedartists 0:0fdadbc3d852 387 // Draw a character
embeddedartists 0:0fdadbc3d852 388 void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c,
embeddedartists 0:0fdadbc3d852 389 uint16_t color, uint16_t bg, uint8_t size) {
embeddedartists 0:0fdadbc3d852 390
embeddedartists 0:0fdadbc3d852 391 if((x >= _width) || // Clip right
embeddedartists 0:0fdadbc3d852 392 (y >= _height) || // Clip bottom
embeddedartists 0:0fdadbc3d852 393 ((x + 6 * size - 1) < 0) || // Clip left
embeddedartists 0:0fdadbc3d852 394 ((y + 8 * size - 1) < 0)) // Clip top
embeddedartists 0:0fdadbc3d852 395 return;
embeddedartists 0:0fdadbc3d852 396
embeddedartists 0:0fdadbc3d852 397 for (int8_t i=0; i<6; i++ ) {
embeddedartists 0:0fdadbc3d852 398 uint8_t line;
embeddedartists 0:0fdadbc3d852 399 if (i == 5)
embeddedartists 0:0fdadbc3d852 400 line = 0x0;
embeddedartists 0:0fdadbc3d852 401 else
embeddedartists 0:0fdadbc3d852 402 line = pgm_read_byte(font+(c*5)+i);
embeddedartists 0:0fdadbc3d852 403 for (int8_t j = 0; j<8; j++) {
embeddedartists 0:0fdadbc3d852 404 if (line & 0x1) {
embeddedartists 0:0fdadbc3d852 405 if (size == 1) // default size
embeddedartists 0:0fdadbc3d852 406 drawPixel(x+i, y+j, color);
embeddedartists 0:0fdadbc3d852 407 else { // big size
embeddedartists 0:0fdadbc3d852 408 fillRect(x+(i*size), y+(j*size), size, size, color);
embeddedartists 0:0fdadbc3d852 409 }
embeddedartists 0:0fdadbc3d852 410 } else if (bg != color) {
embeddedartists 0:0fdadbc3d852 411 if (size == 1) // default size
embeddedartists 0:0fdadbc3d852 412 drawPixel(x+i, y+j, bg);
embeddedartists 0:0fdadbc3d852 413 else { // big size
embeddedartists 0:0fdadbc3d852 414 fillRect(x+i*size, y+j*size, size, size, bg);
embeddedartists 0:0fdadbc3d852 415 }
embeddedartists 0:0fdadbc3d852 416 }
embeddedartists 0:0fdadbc3d852 417 line >>= 1;
embeddedartists 0:0fdadbc3d852 418 }
embeddedartists 0:0fdadbc3d852 419 }
embeddedartists 0:0fdadbc3d852 420 }
embeddedartists 0:0fdadbc3d852 421
embeddedartists 0:0fdadbc3d852 422 void Adafruit_GFX::setCursor(int16_t x, int16_t y) {
embeddedartists 0:0fdadbc3d852 423 cursor_x = x;
embeddedartists 0:0fdadbc3d852 424 cursor_y = y;
embeddedartists 0:0fdadbc3d852 425 }
embeddedartists 0:0fdadbc3d852 426
embeddedartists 0:0fdadbc3d852 427 void Adafruit_GFX::setTextSize(uint8_t s) {
embeddedartists 0:0fdadbc3d852 428 textsize = (s > 0) ? s : 1;
embeddedartists 0:0fdadbc3d852 429 }
embeddedartists 0:0fdadbc3d852 430
embeddedartists 0:0fdadbc3d852 431 void Adafruit_GFX::setTextColor(uint16_t c) {
embeddedartists 0:0fdadbc3d852 432 // For 'transparent' background, we'll set the bg
embeddedartists 0:0fdadbc3d852 433 // to the same as fg instead of using a flag
embeddedartists 0:0fdadbc3d852 434 textcolor = textbgcolor = c;
embeddedartists 0:0fdadbc3d852 435 }
embeddedartists 0:0fdadbc3d852 436
embeddedartists 0:0fdadbc3d852 437 void Adafruit_GFX::setTextColor(uint16_t c, uint16_t b) {
embeddedartists 0:0fdadbc3d852 438 textcolor = c;
embeddedartists 0:0fdadbc3d852 439 textbgcolor = b;
embeddedartists 0:0fdadbc3d852 440 }
embeddedartists 0:0fdadbc3d852 441
embeddedartists 0:0fdadbc3d852 442 void Adafruit_GFX::setTextWrap(bool w) {
embeddedartists 0:0fdadbc3d852 443 wrap = w;
embeddedartists 0:0fdadbc3d852 444 }
embeddedartists 0:0fdadbc3d852 445
embeddedartists 0:0fdadbc3d852 446 uint8_t Adafruit_GFX::getRotation(void) {
embeddedartists 0:0fdadbc3d852 447 return rotation;
embeddedartists 0:0fdadbc3d852 448 }
embeddedartists 0:0fdadbc3d852 449
embeddedartists 0:0fdadbc3d852 450 void Adafruit_GFX::setRotation(uint8_t x) {
embeddedartists 0:0fdadbc3d852 451 rotation = (x & 3);
embeddedartists 0:0fdadbc3d852 452 switch(rotation) {
embeddedartists 0:0fdadbc3d852 453 case 0:
embeddedartists 0:0fdadbc3d852 454 case 2:
embeddedartists 0:0fdadbc3d852 455 _width = WIDTH;
embeddedartists 0:0fdadbc3d852 456 _height = HEIGHT;
embeddedartists 0:0fdadbc3d852 457 break;
embeddedartists 0:0fdadbc3d852 458 case 1:
embeddedartists 0:0fdadbc3d852 459 case 3:
embeddedartists 0:0fdadbc3d852 460 _width = HEIGHT;
embeddedartists 0:0fdadbc3d852 461 _height = WIDTH;
embeddedartists 0:0fdadbc3d852 462 break;
embeddedartists 0:0fdadbc3d852 463 }
embeddedartists 0:0fdadbc3d852 464 }
embeddedartists 0:0fdadbc3d852 465
embeddedartists 0:0fdadbc3d852 466 // Return the size of the display (per current rotation)
embeddedartists 0:0fdadbc3d852 467 int16_t Adafruit_GFX::width(void) {
embeddedartists 0:0fdadbc3d852 468 return _width;
embeddedartists 0:0fdadbc3d852 469 }
embeddedartists 0:0fdadbc3d852 470
embeddedartists 0:0fdadbc3d852 471 int16_t Adafruit_GFX::height(void) {
embeddedartists 0:0fdadbc3d852 472 return _height;
embeddedartists 0:0fdadbc3d852 473 }
embeddedartists 0:0fdadbc3d852 474
embeddedartists 0:0fdadbc3d852 475 void Adafruit_GFX::invertDisplay(bool i) {
embeddedartists 0:0fdadbc3d852 476 // Do nothing, must be subclassed if supported
embeddedartists 0:0fdadbc3d852 477 }
embeddedartists 0:0fdadbc3d852 478
embeddedartists 0:0fdadbc3d852 479