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0 parents commit 4a4d5d6bca98f6bd3c7cb87a8ce73bd65d5cb9f4 @ladyada ladyada committed Mar 13, 2012
Showing with 547 additions and 0 deletions.
  1. +223 −0 Adafruit_GFX.cpp
  2. +58 −0 Adafruit_GFX.h
  3. +266 −0 glcdfont.c
@@ -0,0 +1,223 @@
+#include "Adafruit_GFX.h"
+#include "glcdfont.c"
+#include <avr/pgmspace.h>
+
+// draw a circle outline
+void Adafruit_GFX::drawCircle(uint8_t x0, uint8_t y0, uint8_t r,
+ uint8_t color) {
+ int8_t f = 1 - r;
+ int8_t ddF_x = 1;
+ int8_t ddF_y = -2 * r;
+ int8_t x = 0;
+ int8_t y = r;
+
+ drawPixel(x0, y0+r, color);
+ drawPixel(x0, y0-r, color);
+ drawPixel(x0+r, y0, color);
+ drawPixel(x0-r, y0, color);
+
+ while (x<y) {
+ if (f >= 0) {
+ y--;
+ ddF_y += 2;
+ f += ddF_y;
+ }
+ x++;
+ ddF_x += 2;
+ f += ddF_x;
+
+ drawPixel(x0 + x, y0 + y, color);
+ drawPixel(x0 - x, y0 + y, color);
+ drawPixel(x0 + x, y0 - y, color);
+ drawPixel(x0 - x, y0 - y, color);
+
+ drawPixel(x0 + y, y0 + x, color);
+ drawPixel(x0 - y, y0 + x, color);
+ drawPixel(x0 + y, y0 - x, color);
+ drawPixel(x0 - y, y0 - x, color);
+
+ }
+}
+
+void Adafruit_GFX::fillCircle(uint8_t x0, uint8_t y0, uint8_t r,
+ uint8_t color) {
+ int8_t f = 1 - r;
+ int8_t ddF_x = 1;
+ int8_t ddF_y = -2 * r;
+ int8_t x = 0;
+ int8_t y = r;
+
+ drawFastVLine(x0, y0-r, r*2+1, color);
+
+ while (x<y) {
+ if (f >= 0) {
+ y--;
+ ddF_y += 2;
+ f += ddF_y;
+ }
+ x++;
+ ddF_x += 2;
+ f += ddF_x;
+
+ drawFastVLine(x0+x, y0-y, y*2+1, color);
+ drawFastVLine(x0-x, y0-y, y*2+1, color);
+
+ drawFastVLine(x0+y, y0-x, x*2+1, color);
+ drawFastVLine(x0-y, y0-x, x*2+1, color);
+ }
+}
+
+// bresenham's algorithm - thx wikpedia
+void Adafruit_GFX::drawLine(int16_t x0, int16_t y0,
+ int16_t x1, int16_t y1,
+ uint8_t color) {
+ int16_t steep = abs(y1 - y0) > abs(x1 - x0);
+ if (steep) {
+ swap(x0, y0);
+ swap(x1, y1);
+ }
+
+ if (x0 > x1) {
+ swap(x0, x1);
+ swap(y0, y1);
+ }
+
+ int16_t dx, dy;
+ dx = x1 - x0;
+ dy = abs(y1 - y0);
+
+ int16_t err = dx / 2;
+ int16_t ystep;
+
+ if (y0 < y1) {
+ ystep = 1;
+ } else {
+ ystep = -1;
+ }
+
+ for (; x0<=x1; x0++) {
+ if (steep) {
+ drawPixel(y0, x0, color);
+ } else {
+ drawPixel(x0, y0, color);
+ }
+ err -= dy;
+ if (err < 0) {
+ y0 += ystep;
+ err += dx;
+ }
+ }
+}
+
+
+// draw a rectangle
+void Adafruit_GFX::drawRect(uint8_t x, uint8_t y,
+ uint8_t w, uint8_t h,
+ uint8_t color) {
+ // stupidest version - update in subclasses if desired!
+ for (uint8_t i=x; i<x+w; i++) {
+ drawPixel(i, y, color);
+ drawPixel(i, y+h-1, color);
+ }
+ drawFastVLine(x, y, h, color);
+ drawFastVLine(x+w-1, y, h, color);
+}
+
+void Adafruit_GFX::drawFastVLine(uint8_t x, uint8_t y,
+ uint8_t h, uint8_t color) {
+ // stupidest version - update in subclasses if desired!
+ for (uint8_t j=y; j<y+h; j++) {
+ drawPixel(x, j, color);
+ }
+}
+
+void Adafruit_GFX::fillRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h,
+ uint8_t color) {
+ // stupidest version - update in subclasses if desired!
+ for (uint8_t i=x; i<x+w; i++) {
+ drawFastVLine(i, y, h, color);
+ }
+}
+
+void Adafruit_GFX::drawBitmap(uint8_t x, uint8_t y,
+ const uint8_t *bitmap, uint8_t w, uint8_t h,
+ uint8_t color) {
+ for (uint8_t j=0; j<h; j++) {
+ for (uint8_t i=0; i<w; i++ ) {
+ if (pgm_read_byte(bitmap + i + (j/8)*w) & _BV(j%8)) {
+ drawPixel(x+i, y+j, color);
+ }
+ }
+ }
+}
+
+
+#if ARDUINO >= 100
+size_t Adafruit_GFX::write(uint8_t c) {
+#else
+void Adafruit_GFX::write(uint8_t c) {
+#endif
+ if (c == '\n') {
+ cursor_y += textsize*8;
+ cursor_x = 0;
+ } else if (c == '\r') {
+ // skip em
+ } else {
+ drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize);
+ cursor_x += textsize*6;
+ }
+#if ARDUINO >= 100
+ return 1;
+#endif
+}
+
+// draw a character
+void Adafruit_GFX::drawChar(uint8_t x, uint8_t y, char c,
+ uint16_t color, uint16_t bg, uint8_t size) {
+ for (uint8_t i=0; i<6; i++ ) {
+ uint8_t line;
+ if (i == 5)
+ line = 0x0;
+ else
+ line = pgm_read_byte(font+(c*5)+i);
+ for (uint8_t j = 0; j<8; j++) {
+ if (line & 0x1) {
+ if (size == 1) // default size
+ drawPixel(x+i, y+j, color);
+ else { // big size
+ fillRect(x+(i*size), y+(j*size), size, size, color);
+ }
+ } else if (bg != color) {
+ if (size == 1) // default size
+ drawPixel(x+i, y+j, bg);
+ else { // big size
+ fillRect(x+i*size, y+j*size, size, size, bg);
+ }
+ }
+ line >>= 1;
+ }
+ }
+}
+
+void Adafruit_GFX::setCursor(uint16_t x, uint16_t y) {
+ cursor_x = x;
+ cursor_y = y;
+}
+
+
+void Adafruit_GFX::setTextSize(uint8_t s) {
+ textsize = (s > 0) ? s : 1;
+}
+
+
+void Adafruit_GFX::setTextColor(uint16_t c) {
+ textcolor = c;
+ textbgcolor = c;
+ // for 'transparent' background, we'll set the bg
+ // to the same as fg instead of using a flag
+}
+
+ void Adafruit_GFX::setTextColor(uint16_t c, uint16_t b) {
+ textcolor = c;
+ textbgcolor = b;
+}
@@ -0,0 +1,58 @@
+#ifndef _ADAFRUIT_GFX_H
+#define _ADAFRUIT_GFX_H
+
+#if ARDUINO >= 100
+ #include "Arduino.h"
+ #include "Print.h"
+#else
+ #include "WProgram.h"
+#endif
+
+#define swap(a, b) { int16_t t = a; a = b; b = t; }
+
+class Adafruit_GFX : public Print{
+ public:
+ // this must be defined by the subclass
+ virtual void drawPixel(uint8_t x, uint8_t y, uint8_t color);
+
+ // these are 'generic' drawing functions, so we can share them!
+ void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
+ uint8_t color);
+ virtual void drawFastVLine(uint8_t x, uint8_t y, uint8_t h, uint8_t color);
+ void drawRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h,
+ uint8_t color);
+ void fillRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h,
+ uint8_t color);
+
+ void drawCircle(uint8_t x0, uint8_t y0, uint8_t r,
+ uint8_t color);
+ void fillCircle(uint8_t x0, uint8_t y0, uint8_t r,
+ uint8_t color);
+
+ void drawBitmap(uint8_t x, uint8_t y,
+ const uint8_t *bitmap, uint8_t w, uint8_t h,
+ uint8_t color);
+ void drawChar(uint8_t x, uint8_t y, char c,
+ uint16_t color, uint16_t bg, uint8_t size);
+#if ARDUINO >= 100
+ virtual size_t write(uint8_t);
+#else
+ virtual void write(uint8_t);
+#endif
+ void setCursor(uint16_t x, uint16_t y);
+ void setTextColor(uint16_t c);
+ void setTextColor(uint16_t c, uint16_t bg);
+ void setTextSize(uint8_t s);
+
+
+ // return the size of the display
+ uint16_t width() { return WIDTH; }
+ uint16_t height() { return HEIGHT; }
+
+ protected:
+ uint16_t WIDTH, HEIGHT;
+ uint16_t cursor_x, cursor_y, textcolor, textbgcolor;
+ uint8_t textsize;
+};
+
+#endif
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