Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Cannot retrieve contributors at this time

616 lines (520 sloc) 13.24 kb
/******************************************************************
This is the core graphics library for all our displays, providing
basic graphics primitives (points, lines, circles, etc.). It needs
to be paired with a hardware-specific library for each display
device we carry (handling the lower-level functions).
Adafruit invests time and resources providing this open
source code, please support Adafruit and open-source hardware
by purchasing products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, check license.txt for more information.
All text above must be included in any redistribution.
02/18/2013 Charles-Henri Hallard (http://hallard.me)
Modified for compiling and use on Raspberry ArduiPi Board
LCD size and connection are now passed as arguments on
the command line (no more #define on compilation needed)
ArduiPi project documentation http://hallard.me/arduipi
07/01/2013 Charles-Henri Hallard (http://hallard.me)
Created Draw Bargraph feature
Added printf feature
******************************************************************/
#include "./ArduiPi_SSD1306.h"
#include "./Adafruit_GFX.h"
#include "./glcdfont.c"
void Adafruit_GFX::constructor(int16_t w, int16_t h)
{
_width = WIDTH = w;
_height = HEIGHT = h;
rotation = 0;
cursor_y = cursor_x = 0;
textsize = 1;
textcolor = textbgcolor = 0xFFFF;
wrap = true;
}
// the printf function
void Adafruit_GFX::printf( const char * format, ...)
{
char buffer[64];
char * p = buffer;
int n;
va_list args;
va_start (args, format);
vsnprintf (buffer, sizeof(buffer)-1, format, args);
n = strlen(buffer);
while (*p != 0 && n-->0)
{
write ( (uint8_t) *p++);
}
va_end (args);
}
// the print function
void Adafruit_GFX::print( const char * string)
{
const char * p = string;
int n = strlen(string);
while (*p != 0 && n-->0)
{
write ( (uint8_t) *p++);
}
}
// draw a circle outline
void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
{
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_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::drawCircleHelper( int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color)
{
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
while (x<y)
{
if (f >= 0)
{
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x4)
{
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 + y, y0 + x, color);
}
if (cornername & 0x2)
{
drawPixel(x0 + x, y0 - y, color);
drawPixel(x0 + y, y0 - x, color);
}
if (cornername & 0x8)
{
drawPixel(x0 - y, y0 + x, color);
drawPixel(x0 - x, y0 + y, color);
}
if (cornername & 0x1)
{
drawPixel(x0 - y, y0 - x, color);
drawPixel(x0 - x, y0 - y, color);
}
}
}
void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
{
drawFastVLine(x0, y0-r, 2*r+1, color);
fillCircleHelper(x0, y0, r, 3, 0, color);
}
// used to do circles and roundrects!
void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color)
{
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
while (x<y)
{
if (f >= 0)
{
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x1)
{
drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
}
if (cornername & 0x2)
{
drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
}
}
}
// bresenham's algorithm - thx wikpedia
void Adafruit_GFX::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_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(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
{
drawFastHLine(x, y, w, color);
drawFastHLine(x, y+h-1, w, color);
drawFastVLine(x, y, h, color);
drawFastVLine(x+w-1, y, h, color);
}
void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color)
{
// stupidest version - update in subclasses if desired!
drawLine(x, y, x, y+h-1, color);
}
void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)
{
// stupidest version - update in subclasses if desired!
drawLine(x, y, x+w-1, y, color);
}
void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)
{
// stupidest version - update in subclasses if desired!
for (int16_t i=x; i<x+w; i++)
{
drawFastVLine(i, y, h, color);
}
}
// draw a vertical bargraph and fill it with percent value (0%..100%)
void Adafruit_GFX::drawVerticalBargraph(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color, uint16_t percent)
{
uint16_t vsize;
// Create rectangle
drawRect(x,y, w, h, color) ;
// Do not do stupid job
if ( h>2 && w>2 )
{
// calculate pixel size of bargraph
vsize = ( ( h - 2) * percent ) / 100 ;
// Fill it from bottom (0%) to top (100%)
fillRect(x+1,y+1 + (( h-2)-vsize), w - 2, vsize, color);
}
}
// draw a horizontal bargraph and fill it with percent value (0%..100%)
void Adafruit_GFX::drawHorizontalBargraph(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color, uint16_t percent)
{
uint16_t hsize;
// Create rectangle
drawRect(x,y, w, h, color) ;
// Do not do stupid job
if ( h>2 && w>2 )
{
// calculate pixel size of bargraph
hsize = ( ( w - 2) * percent ) / 100 ;
// Fill it from left (0%) to right (100%)
fillRect(x+1 , y+1 , hsize, h - 2, color);
}
}
void Adafruit_GFX::fillScreen(uint16_t color)
{
fillRect(0, 0, _width, _height, color);
}
// draw a rounded rectangle!
void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
{
// smarter version
drawFastHLine(x+r , y , w-2*r, color); // Top
drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
drawFastVLine( x , y+r , h-2*r, color); // Left
drawFastVLine( x+w-1, y+r , h-2*r, color); // Right
// draw four corners
drawCircleHelper(x+r , y+r , r, 1, color);
drawCircleHelper(x+w-r-1, y+r , r, 2, color);
drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
drawCircleHelper(x+r , y+h-r-1, r, 8, color);
}
// fill a rounded rectangle!
void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color)
{
// smarter version
fillRect(x+r, y, w-2*r, h, color);
// draw four corners
fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
}
// draw a triangle!
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)
{
drawLine(x0, y0, x1, y1, color);
drawLine(x1, y1, x2, y2, color);
drawLine(x2, y2, x0, y0, color);
}
// fill a triangle!
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)
{
int16_t a, b, y, last;
// Sort coordinates by Y order (y2 >= y1 >= y0)
if (y0 > y1)
{
swap(y0, y1); swap(x0, x1);
}
if (y1 > y2)
{
swap(y2, y1); swap(x2, x1);
}
if (y0 > y1)
{
swap(y0, y1); swap(x0, x1);
}
if(y0 == y2)
{ // Handle awkward all-on-same-line case as its own thing
a = b = x0;
if(x1 < a) a = x1;
else if(x1 > b) b = x1;
if(x2 < a) a = x2;
else if(x2 > b) b = x2;
drawFastHLine(a, y0, b-a+1, color);
return;
}
int16_t
dx01 = x1 - x0,
dy01 = y1 - y0,
dx02 = x2 - x0,
dy02 = y2 - y0,
dx12 = x2 - x1,
dy12 = y2 - y1,
sa = 0,
sb = 0;
// For upper part of triangle, find scanline crossings for segments
// 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
// is included here (and second loop will be skipped, avoiding a /0
// error there), otherwise scanline y1 is skipped here and handled
// in the second loop...which also avoids a /0 error here if y0=y1
// (flat-topped triangle).
if(y1 == y2)
last = y1; // Include y1 scanline
else
last = y1-1; // Skip it
for(y=y0; y<=last; y++)
{
a = x0 + sa / dy01;
b = x0 + sb / dy02;
sa += dx01;
sb += dx02;
/* longhand:
a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
*/
if(a > b)
swap(a,b);
drawFastHLine(a, y, b-a+1, color);
}
// For lower part of triangle, find scanline crossings for segments
// 0-2 and 1-2. This loop is skipped if y1=y2.
sa = dx12 * (y - y1);
sb = dx02 * (y - y0);
for(; y<=y2; y++)
{
a = x1 + sa / dy12;
b = x0 + sb / dy02;
sa += dx12;
sb += dx02;
/* longhand:
a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
*/
if(a > b)
swap(a,b);
drawFastHLine(a, y, b-a+1, color);
}
}
void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color)
{
int16_t i, j, byteWidth = (w + 7) / 8;
for(j=0; j<h; j++)
{
for(i=0; i<w; i++ )
{
if( *(bitmap + j * byteWidth + i / 8) & (128 >> (i & 7)))
{
drawPixel(x+i, y+j, color);
}
}
}
}
size_t Adafruit_GFX::write(uint8_t c)
{
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 (wrap && (cursor_x > (_width - textsize*6)))
{
cursor_y += textsize*8;
cursor_x = 0;
}
}
return 1;
}
// draw a character
void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
{
if((x >= _width) || // Clip right
(y >= _height) || // Clip bottom
((x + 5 * size - 1) < 0) || // Clip left
((y + 8 * size - 1) < 0)) // Clip top
return;
for (int8_t i=0; i<6; i++ )
{
uint8_t line;
if (i == 5)
line = 0x0;
else
//line = pgm_read_byte(font+(c*5)+i);
line = font[(c*5)+i];
for (int8_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(int16_t x, int16_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;
}
void Adafruit_GFX::setTextWrap(boolean w)
{
wrap = w;
}
uint8_t Adafruit_GFX::getRotation(void)
{
rotation %= 4;
return rotation;
}
void Adafruit_GFX::setRotation(uint8_t x)
{
x %= 4; // cant be higher than 3
rotation = x;
switch (x)
{
case 0:
case 2:
_width = WIDTH;
_height = HEIGHT;
break;
case 1:
case 3:
_width = HEIGHT;
_height = WIDTH;
break;
}
}
void Adafruit_GFX::invertDisplay(boolean i)
{
// do nothing, can be subclassed
}
// return the size of the display which depends on the rotation!
int16_t Adafruit_GFX::width(void)
{
return _width;
}
int16_t Adafruit_GFX::height(void)
{
return _height;
}
Jump to Line
Something went wrong with that request. Please try again.