Gerrit Pathuis / Mbed 2 deprecated Epaper_epd1in54_Waveshare

E_paper, E_ink, Screen size 1.54", resolution 200x200, 4 wire spi, Waveshare, Black and White, Kl25Z, 8 wire print connector, supply 3.3 Volt, IL0373 Controller, font size is 8, 12, 16 and 24.

Dependencies:   mbed

epdpaint.cpp@0:665e04c85d8d, 2018-03-25 (annotated)

Committer:
GerritPathuis
Date:
Sun Mar 25 12:14:55 2018 +0000
Revision:
0:665e04c85d8d
Child:
1:d27a7e06c233
Start point

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GerritPathuis 0:665e04c85d8d 1 /**
GerritPathuis 0:665e04c85d8d 2 * @filename : epdpaint.cpp
GerritPathuis 0:665e04c85d8d 3 * @brief : Paint tools
GerritPathuis 0:665e04c85d8d 4 * @author : Yehui from Waveshare
GerritPathuis 0:665e04c85d8d 5 *
GerritPathuis 0:665e04c85d8d 6 * Copyright (C) Waveshare September 9 2017
GerritPathuis 0:665e04c85d8d 7 *
GerritPathuis 0:665e04c85d8d 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
GerritPathuis 0:665e04c85d8d 9 * of this software and associated documnetation files (the "Software"), to deal
GerritPathuis 0:665e04c85d8d 10 * in the Software without restriction, including without limitation the rights
GerritPathuis 0:665e04c85d8d 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
GerritPathuis 0:665e04c85d8d 12 * copies of the Software, and to permit persons to whom the Software is
GerritPathuis 0:665e04c85d8d 13 * furished to do so, subject to the following conditions:
GerritPathuis 0:665e04c85d8d 14 *
GerritPathuis 0:665e04c85d8d 15 * The above copyright notice and this permission notice shall be included in
GerritPathuis 0:665e04c85d8d 16 * all copies or substantial portions of the Software.
GerritPathuis 0:665e04c85d8d 17 *
GerritPathuis 0:665e04c85d8d 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
GerritPathuis 0:665e04c85d8d 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
GerritPathuis 0:665e04c85d8d 20 * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
GerritPathuis 0:665e04c85d8d 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
GerritPathuis 0:665e04c85d8d 22 * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
GerritPathuis 0:665e04c85d8d 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
GerritPathuis 0:665e04c85d8d 24 * THE SOFTWARE.
GerritPathuis 0:665e04c85d8d 25 */
GerritPathuis 0:665e04c85d8d 26
GerritPathuis 0:665e04c85d8d 27 #include <avr/pgmspace.h>
GerritPathuis 0:665e04c85d8d 28 #include "epdpaint.h"
GerritPathuis 0:665e04c85d8d 29
GerritPathuis 0:665e04c85d8d 30 Paint::Paint(unsigned char* image, int width, int height) {
GerritPathuis 0:665e04c85d8d 31 this->rotate = ROTATE_0;
GerritPathuis 0:665e04c85d8d 32 this->image = image;
GerritPathuis 0:665e04c85d8d 33 /* 1 byte = 8 pixels, so the width should be the multiple of 8 */
GerritPathuis 0:665e04c85d8d 34 this->width = width % 8 ? width + 8 - (width % 8) : width;
GerritPathuis 0:665e04c85d8d 35 this->height = height;
GerritPathuis 0:665e04c85d8d 36 }
GerritPathuis 0:665e04c85d8d 37
GerritPathuis 0:665e04c85d8d 38 Paint::~Paint() {
GerritPathuis 0:665e04c85d8d 39 }
GerritPathuis 0:665e04c85d8d 40
GerritPathuis 0:665e04c85d8d 41 /**
GerritPathuis 0:665e04c85d8d 42 * @brief: clear the image
GerritPathuis 0:665e04c85d8d 43 */
GerritPathuis 0:665e04c85d8d 44 void Paint::Clear(int colored) {
GerritPathuis 0:665e04c85d8d 45 for (int x = 0; x < this->width; x++) {
GerritPathuis 0:665e04c85d8d 46 for (int y = 0; y < this->height; y++) {
GerritPathuis 0:665e04c85d8d 47 DrawAbsolutePixel(x, y, colored);
GerritPathuis 0:665e04c85d8d 48 }
GerritPathuis 0:665e04c85d8d 49 }
GerritPathuis 0:665e04c85d8d 50 }
GerritPathuis 0:665e04c85d8d 51
GerritPathuis 0:665e04c85d8d 52 /**
GerritPathuis 0:665e04c85d8d 53 * @brief: this draws a pixel by absolute coordinates.
GerritPathuis 0:665e04c85d8d 54 * this function won't be affected by the rotate parameter.
GerritPathuis 0:665e04c85d8d 55 */
GerritPathuis 0:665e04c85d8d 56 void Paint::DrawAbsolutePixel(int x, int y, int colored) {
GerritPathuis 0:665e04c85d8d 57 if (x < 0 || x >= this->width || y < 0 || y >= this->height) {
GerritPathuis 0:665e04c85d8d 58 return;
GerritPathuis 0:665e04c85d8d 59 }
GerritPathuis 0:665e04c85d8d 60 if (IF_INVERT_COLOR) {
GerritPathuis 0:665e04c85d8d 61 if (colored) {
GerritPathuis 0:665e04c85d8d 62 image[(x + y * this->width) / 8] |= 0x80 >> (x % 8);
GerritPathuis 0:665e04c85d8d 63 } else {
GerritPathuis 0:665e04c85d8d 64 image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8));
GerritPathuis 0:665e04c85d8d 65 }
GerritPathuis 0:665e04c85d8d 66 } else {
GerritPathuis 0:665e04c85d8d 67 if (colored) {
GerritPathuis 0:665e04c85d8d 68 image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8));
GerritPathuis 0:665e04c85d8d 69 } else {
GerritPathuis 0:665e04c85d8d 70 image[(x + y * this->width) / 8] |= 0x80 >> (x % 8);
GerritPathuis 0:665e04c85d8d 71 }
GerritPathuis 0:665e04c85d8d 72 }
GerritPathuis 0:665e04c85d8d 73 }
GerritPathuis 0:665e04c85d8d 74
GerritPathuis 0:665e04c85d8d 75 /**
GerritPathuis 0:665e04c85d8d 76 * @brief: Getters and Setters
GerritPathuis 0:665e04c85d8d 77 */
GerritPathuis 0:665e04c85d8d 78 unsigned char* Paint::GetImage(void) {
GerritPathuis 0:665e04c85d8d 79 return this->image;
GerritPathuis 0:665e04c85d8d 80 }
GerritPathuis 0:665e04c85d8d 81
GerritPathuis 0:665e04c85d8d 82 int Paint::GetWidth(void) {
GerritPathuis 0:665e04c85d8d 83 return this->width;
GerritPathuis 0:665e04c85d8d 84 }
GerritPathuis 0:665e04c85d8d 85
GerritPathuis 0:665e04c85d8d 86 void Paint::SetWidth(int width) {
GerritPathuis 0:665e04c85d8d 87 this->width = width % 8 ? width + 8 - (width % 8) : width;
GerritPathuis 0:665e04c85d8d 88 }
GerritPathuis 0:665e04c85d8d 89
GerritPathuis 0:665e04c85d8d 90 int Paint::GetHeight(void) {
GerritPathuis 0:665e04c85d8d 91 return this->height;
GerritPathuis 0:665e04c85d8d 92 }
GerritPathuis 0:665e04c85d8d 93
GerritPathuis 0:665e04c85d8d 94 void Paint::SetHeight(int height) {
GerritPathuis 0:665e04c85d8d 95 this->height = height;
GerritPathuis 0:665e04c85d8d 96 }
GerritPathuis 0:665e04c85d8d 97
GerritPathuis 0:665e04c85d8d 98 int Paint::GetRotate(void) {
GerritPathuis 0:665e04c85d8d 99 return this->rotate;
GerritPathuis 0:665e04c85d8d 100 }
GerritPathuis 0:665e04c85d8d 101
GerritPathuis 0:665e04c85d8d 102 void Paint::SetRotate(int rotate){
GerritPathuis 0:665e04c85d8d 103 this->rotate = rotate;
GerritPathuis 0:665e04c85d8d 104 }
GerritPathuis 0:665e04c85d8d 105
GerritPathuis 0:665e04c85d8d 106 /**
GerritPathuis 0:665e04c85d8d 107 * @brief: this draws a pixel by the coordinates
GerritPathuis 0:665e04c85d8d 108 */
GerritPathuis 0:665e04c85d8d 109 void Paint::DrawPixel(int x, int y, int colored) {
GerritPathuis 0:665e04c85d8d 110 int point_temp;
GerritPathuis 0:665e04c85d8d 111 if (this->rotate == ROTATE_0) {
GerritPathuis 0:665e04c85d8d 112 if(x < 0 || x >= this->width || y < 0 || y >= this->height) {
GerritPathuis 0:665e04c85d8d 113 return;
GerritPathuis 0:665e04c85d8d 114 }
GerritPathuis 0:665e04c85d8d 115 DrawAbsolutePixel(x, y, colored);
GerritPathuis 0:665e04c85d8d 116 } else if (this->rotate == ROTATE_90) {
GerritPathuis 0:665e04c85d8d 117 if(x < 0 || x >= this->height || y < 0 || y >= this->width) {
GerritPathuis 0:665e04c85d8d 118 return;
GerritPathuis 0:665e04c85d8d 119 }
GerritPathuis 0:665e04c85d8d 120 point_temp = x;
GerritPathuis 0:665e04c85d8d 121 x = this->width - y;
GerritPathuis 0:665e04c85d8d 122 y = point_temp;
GerritPathuis 0:665e04c85d8d 123 DrawAbsolutePixel(x, y, colored);
GerritPathuis 0:665e04c85d8d 124 } else if (this->rotate == ROTATE_180) {
GerritPathuis 0:665e04c85d8d 125 if(x < 0 || x >= this->width || y < 0 || y >= this->height) {
GerritPathuis 0:665e04c85d8d 126 return;
GerritPathuis 0:665e04c85d8d 127 }
GerritPathuis 0:665e04c85d8d 128 x = this->width - x;
GerritPathuis 0:665e04c85d8d 129 y = this->height - y;
GerritPathuis 0:665e04c85d8d 130 DrawAbsolutePixel(x, y, colored);
GerritPathuis 0:665e04c85d8d 131 } else if (this->rotate == ROTATE_270) {
GerritPathuis 0:665e04c85d8d 132 if(x < 0 || x >= this->height || y < 0 || y >= this->width) {
GerritPathuis 0:665e04c85d8d 133 return;
GerritPathuis 0:665e04c85d8d 134 }
GerritPathuis 0:665e04c85d8d 135 point_temp = x;
GerritPathuis 0:665e04c85d8d 136 x = y;
GerritPathuis 0:665e04c85d8d 137 y = this->height - point_temp;
GerritPathuis 0:665e04c85d8d 138 DrawAbsolutePixel(x, y, colored);
GerritPathuis 0:665e04c85d8d 139 }
GerritPathuis 0:665e04c85d8d 140 }
GerritPathuis 0:665e04c85d8d 141
GerritPathuis 0:665e04c85d8d 142 /**
GerritPathuis 0:665e04c85d8d 143 * @brief: this draws a charactor on the frame buffer but not refresh
GerritPathuis 0:665e04c85d8d 144 */
GerritPathuis 0:665e04c85d8d 145 void Paint::DrawCharAt(int x, int y, char ascii_char, sFONT* font, int colored) {
GerritPathuis 0:665e04c85d8d 146 int i, j;
GerritPathuis 0:665e04c85d8d 147 unsigned int char_offset = (ascii_char - ' ') * font->Height * (font->Width / 8 + (font->Width % 8 ? 1 : 0));
GerritPathuis 0:665e04c85d8d 148 const unsigned char* ptr = &font->table[char_offset];
GerritPathuis 0:665e04c85d8d 149
GerritPathuis 0:665e04c85d8d 150 for (j = 0; j < font->Height; j++) {
GerritPathuis 0:665e04c85d8d 151 for (i = 0; i < font->Width; i++) {
GerritPathuis 0:665e04c85d8d 152 if (pgm_read_byte(ptr) & (0x80 >> (i % 8))) {
GerritPathuis 0:665e04c85d8d 153 DrawPixel(x + i, y + j, colored);
GerritPathuis 0:665e04c85d8d 154 }
GerritPathuis 0:665e04c85d8d 155 if (i % 8 == 7) {
GerritPathuis 0:665e04c85d8d 156 ptr++;
GerritPathuis 0:665e04c85d8d 157 }
GerritPathuis 0:665e04c85d8d 158 }
GerritPathuis 0:665e04c85d8d 159 if (font->Width % 8 != 0) {
GerritPathuis 0:665e04c85d8d 160 ptr++;
GerritPathuis 0:665e04c85d8d 161 }
GerritPathuis 0:665e04c85d8d 162 }
GerritPathuis 0:665e04c85d8d 163 }
GerritPathuis 0:665e04c85d8d 164
GerritPathuis 0:665e04c85d8d 165 /**
GerritPathuis 0:665e04c85d8d 166 * @brief: this displays a string on the frame buffer but not refresh
GerritPathuis 0:665e04c85d8d 167 */
GerritPathuis 0:665e04c85d8d 168 void Paint::DrawStringAt(int x, int y, const char* text, sFONT* font, int colored) {
GerritPathuis 0:665e04c85d8d 169 const char* p_text = text;
GerritPathuis 0:665e04c85d8d 170 unsigned int counter = 0;
GerritPathuis 0:665e04c85d8d 171 int refcolumn = x;
GerritPathuis 0:665e04c85d8d 172
GerritPathuis 0:665e04c85d8d 173 /* Send the string character by character on EPD */
GerritPathuis 0:665e04c85d8d 174 while (*p_text != 0) {
GerritPathuis 0:665e04c85d8d 175 /* Display one character on EPD */
GerritPathuis 0:665e04c85d8d 176 DrawCharAt(refcolumn, y, *p_text, font, colored);
GerritPathuis 0:665e04c85d8d 177 /* Decrement the column position by 16 */
GerritPathuis 0:665e04c85d8d 178 refcolumn += font->Width;
GerritPathuis 0:665e04c85d8d 179 /* Point on the next character */
GerritPathuis 0:665e04c85d8d 180 p_text++;
GerritPathuis 0:665e04c85d8d 181 counter++;
GerritPathuis 0:665e04c85d8d 182 }
GerritPathuis 0:665e04c85d8d 183 }
GerritPathuis 0:665e04c85d8d 184
GerritPathuis 0:665e04c85d8d 185 /**
GerritPathuis 0:665e04c85d8d 186 * @brief: this draws a line on the frame buffer
GerritPathuis 0:665e04c85d8d 187 */
GerritPathuis 0:665e04c85d8d 188 void Paint::DrawLine(int x0, int y0, int x1, int y1, int colored) {
GerritPathuis 0:665e04c85d8d 189 /* Bresenham algorithm */
GerritPathuis 0:665e04c85d8d 190 int dx = x1 - x0 >= 0 ? x1 - x0 : x0 - x1;
GerritPathuis 0:665e04c85d8d 191 int sx = x0 < x1 ? 1 : -1;
GerritPathuis 0:665e04c85d8d 192 int dy = y1 - y0 <= 0 ? y1 - y0 : y0 - y1;
GerritPathuis 0:665e04c85d8d 193 int sy = y0 < y1 ? 1 : -1;
GerritPathuis 0:665e04c85d8d 194 int err = dx + dy;
GerritPathuis 0:665e04c85d8d 195
GerritPathuis 0:665e04c85d8d 196 while((x0 != x1) && (y0 != y1)) {
GerritPathuis 0:665e04c85d8d 197 DrawPixel(x0, y0 , colored);
GerritPathuis 0:665e04c85d8d 198 if (2 * err >= dy) {
GerritPathuis 0:665e04c85d8d 199 err += dy;
GerritPathuis 0:665e04c85d8d 200 x0 += sx;
GerritPathuis 0:665e04c85d8d 201 }
GerritPathuis 0:665e04c85d8d 202 if (2 * err <= dx) {
GerritPathuis 0:665e04c85d8d 203 err += dx;
GerritPathuis 0:665e04c85d8d 204 y0 += sy;
GerritPathuis 0:665e04c85d8d 205 }
GerritPathuis 0:665e04c85d8d 206 }
GerritPathuis 0:665e04c85d8d 207 }
GerritPathuis 0:665e04c85d8d 208
GerritPathuis 0:665e04c85d8d 209 /**
GerritPathuis 0:665e04c85d8d 210 * @brief: this draws a horizontal line on the frame buffer
GerritPathuis 0:665e04c85d8d 211 */
GerritPathuis 0:665e04c85d8d 212 void Paint::DrawHorizontalLine(int x, int y, int line_width, int colored) {
GerritPathuis 0:665e04c85d8d 213 int i;
GerritPathuis 0:665e04c85d8d 214 for (i = x; i < x + line_width; i++) {
GerritPathuis 0:665e04c85d8d 215 DrawPixel(i, y, colored);
GerritPathuis 0:665e04c85d8d 216 }
GerritPathuis 0:665e04c85d8d 217 }
GerritPathuis 0:665e04c85d8d 218
GerritPathuis 0:665e04c85d8d 219 /**
GerritPathuis 0:665e04c85d8d 220 * @brief: this draws a vertical line on the frame buffer
GerritPathuis 0:665e04c85d8d 221 */
GerritPathuis 0:665e04c85d8d 222 void Paint::DrawVerticalLine(int x, int y, int line_height, int colored) {
GerritPathuis 0:665e04c85d8d 223 int i;
GerritPathuis 0:665e04c85d8d 224 for (i = y; i < y + line_height; i++) {
GerritPathuis 0:665e04c85d8d 225 DrawPixel(x, i, colored);
GerritPathuis 0:665e04c85d8d 226 }
GerritPathuis 0:665e04c85d8d 227 }
GerritPathuis 0:665e04c85d8d 228
GerritPathuis 0:665e04c85d8d 229 /**
GerritPathuis 0:665e04c85d8d 230 * @brief: this draws a rectangle
GerritPathuis 0:665e04c85d8d 231 */
GerritPathuis 0:665e04c85d8d 232 void Paint::DrawRectangle(int x0, int y0, int x1, int y1, int colored) {
GerritPathuis 0:665e04c85d8d 233 int min_x, min_y, max_x, max_y;
GerritPathuis 0:665e04c85d8d 234 min_x = x1 > x0 ? x0 : x1;
GerritPathuis 0:665e04c85d8d 235 max_x = x1 > x0 ? x1 : x0;
GerritPathuis 0:665e04c85d8d 236 min_y = y1 > y0 ? y0 : y1;
GerritPathuis 0:665e04c85d8d 237 max_y = y1 > y0 ? y1 : y0;
GerritPathuis 0:665e04c85d8d 238
GerritPathuis 0:665e04c85d8d 239 DrawHorizontalLine(min_x, min_y, max_x - min_x + 1, colored);
GerritPathuis 0:665e04c85d8d 240 DrawHorizontalLine(min_x, max_y, max_x - min_x + 1, colored);
GerritPathuis 0:665e04c85d8d 241 DrawVerticalLine(min_x, min_y, max_y - min_y + 1, colored);
GerritPathuis 0:665e04c85d8d 242 DrawVerticalLine(max_x, min_y, max_y - min_y + 1, colored);
GerritPathuis 0:665e04c85d8d 243 }
GerritPathuis 0:665e04c85d8d 244
GerritPathuis 0:665e04c85d8d 245 /**
GerritPathuis 0:665e04c85d8d 246 * @brief: this draws a filled rectangle
GerritPathuis 0:665e04c85d8d 247 */
GerritPathuis 0:665e04c85d8d 248 void Paint::DrawFilledRectangle(int x0, int y0, int x1, int y1, int colored) {
GerritPathuis 0:665e04c85d8d 249 int min_x, min_y, max_x, max_y;
GerritPathuis 0:665e04c85d8d 250 int i;
GerritPathuis 0:665e04c85d8d 251 min_x = x1 > x0 ? x0 : x1;
GerritPathuis 0:665e04c85d8d 252 max_x = x1 > x0 ? x1 : x0;
GerritPathuis 0:665e04c85d8d 253 min_y = y1 > y0 ? y0 : y1;
GerritPathuis 0:665e04c85d8d 254 max_y = y1 > y0 ? y1 : y0;
GerritPathuis 0:665e04c85d8d 255
GerritPathuis 0:665e04c85d8d 256 for (i = min_x; i <= max_x; i++) {
GerritPathuis 0:665e04c85d8d 257 DrawVerticalLine(i, min_y, max_y - min_y + 1, colored);
GerritPathuis 0:665e04c85d8d 258 }
GerritPathuis 0:665e04c85d8d 259 }
GerritPathuis 0:665e04c85d8d 260
GerritPathuis 0:665e04c85d8d 261 /**
GerritPathuis 0:665e04c85d8d 262 * @brief: this draws a circle
GerritPathuis 0:665e04c85d8d 263 */
GerritPathuis 0:665e04c85d8d 264 void Paint::DrawCircle(int x, int y, int radius, int colored) {
GerritPathuis 0:665e04c85d8d 265 /* Bresenham algorithm */
GerritPathuis 0:665e04c85d8d 266 int x_pos = -radius;
GerritPathuis 0:665e04c85d8d 267 int y_pos = 0;
GerritPathuis 0:665e04c85d8d 268 int err = 2 - 2 * radius;
GerritPathuis 0:665e04c85d8d 269 int e2;
GerritPathuis 0:665e04c85d8d 270
GerritPathuis 0:665e04c85d8d 271 do {
GerritPathuis 0:665e04c85d8d 272 DrawPixel(x - x_pos, y + y_pos, colored);
GerritPathuis 0:665e04c85d8d 273 DrawPixel(x + x_pos, y + y_pos, colored);
GerritPathuis 0:665e04c85d8d 274 DrawPixel(x + x_pos, y - y_pos, colored);
GerritPathuis 0:665e04c85d8d 275 DrawPixel(x - x_pos, y - y_pos, colored);
GerritPathuis 0:665e04c85d8d 276 e2 = err;
GerritPathuis 0:665e04c85d8d 277 if (e2 <= y_pos) {
GerritPathuis 0:665e04c85d8d 278 err += ++y_pos * 2 + 1;
GerritPathuis 0:665e04c85d8d 279 if(-x_pos == y_pos && e2 <= x_pos) {
GerritPathuis 0:665e04c85d8d 280 e2 = 0;
GerritPathuis 0:665e04c85d8d 281 }
GerritPathuis 0:665e04c85d8d 282 }
GerritPathuis 0:665e04c85d8d 283 if (e2 > x_pos) {
GerritPathuis 0:665e04c85d8d 284 err += ++x_pos * 2 + 1;
GerritPathuis 0:665e04c85d8d 285 }
GerritPathuis 0:665e04c85d8d 286 } while (x_pos <= 0);
GerritPathuis 0:665e04c85d8d 287 }
GerritPathuis 0:665e04c85d8d 288
GerritPathuis 0:665e04c85d8d 289 /**
GerritPathuis 0:665e04c85d8d 290 * @brief: this draws a filled circle
GerritPathuis 0:665e04c85d8d 291 */
GerritPathuis 0:665e04c85d8d 292 void Paint::DrawFilledCircle(int x, int y, int radius, int colored) {
GerritPathuis 0:665e04c85d8d 293 /* Bresenham algorithm */
GerritPathuis 0:665e04c85d8d 294 int x_pos = -radius;
GerritPathuis 0:665e04c85d8d 295 int y_pos = 0;
GerritPathuis 0:665e04c85d8d 296 int err = 2 - 2 * radius;
GerritPathuis 0:665e04c85d8d 297 int e2;
GerritPathuis 0:665e04c85d8d 298
GerritPathuis 0:665e04c85d8d 299 do {
GerritPathuis 0:665e04c85d8d 300 DrawPixel(x - x_pos, y + y_pos, colored);
GerritPathuis 0:665e04c85d8d 301 DrawPixel(x + x_pos, y + y_pos, colored);
GerritPathuis 0:665e04c85d8d 302 DrawPixel(x + x_pos, y - y_pos, colored);
GerritPathuis 0:665e04c85d8d 303 DrawPixel(x - x_pos, y - y_pos, colored);
GerritPathuis 0:665e04c85d8d 304 DrawHorizontalLine(x + x_pos, y + y_pos, 2 * (-x_pos) + 1, colored);
GerritPathuis 0:665e04c85d8d 305 DrawHorizontalLine(x + x_pos, y - y_pos, 2 * (-x_pos) + 1, colored);
GerritPathuis 0:665e04c85d8d 306 e2 = err;
GerritPathuis 0:665e04c85d8d 307 if (e2 <= y_pos) {
GerritPathuis 0:665e04c85d8d 308 err += ++y_pos * 2 + 1;
GerritPathuis 0:665e04c85d8d 309 if(-x_pos == y_pos && e2 <= x_pos) {
GerritPathuis 0:665e04c85d8d 310 e2 = 0;
GerritPathuis 0:665e04c85d8d 311 }
GerritPathuis 0:665e04c85d8d 312 }
GerritPathuis 0:665e04c85d8d 313 if(e2 > x_pos) {
GerritPathuis 0:665e04c85d8d 314 err += ++x_pos * 2 + 1;
GerritPathuis 0:665e04c85d8d 315 }
GerritPathuis 0:665e04c85d8d 316 } while(x_pos <= 0);
GerritPathuis 0:665e04c85d8d 317 }
GerritPathuis 0:665e04c85d8d 318
GerritPathuis 0:665e04c85d8d 319 /* END OF FILE */
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