![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Hacked version of AdaFruit graphics library for SSD1306 usage on I2C
Diff: Adafruit_GFX.cpp
- Revision:
- 0:b0151666c710
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Adafruit_GFX.cpp Thu Jun 15 15:01:14 2017 +0000 @@ -0,0 +1,752 @@ +/* +This is the core graphics library for all our displays, providing a common +set of graphics primitives (points, lines, circles, etc.). It needs to be +paired with a hardware-specific library for each display device we carry +(to handle the lower-level functions). + +Adafruit invests time and resources providing this open source code, please +support Adafruit & open-source hardware by purchasing products from Adafruit! + +Copyright (c) 2013 Adafruit Industries. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +- Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. +- Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. +*/ + +#include "Adafruit_GFX.h" +#include "glcdfont.c" + +// Many (but maybe not all) non-AVR board installs define macros +// for compatibility with existing PROGMEM-reading AVR code. +// Do our own checks and defines here for good measure... + +#ifndef pgm_read_byte + #define pgm_read_byte(addr) (*(const unsigned char *)(addr)) +#endif +#ifndef pgm_read_word + #define pgm_read_word(addr) (*(const unsigned short *)(addr)) +#endif +#ifndef pgm_read_dword + #define pgm_read_dword(addr) (*(const unsigned long *)(addr)) +#endif + +// Pointers are a peculiar case...typically 16-bit on AVR boards, +// 32 bits elsewhere. Try to accommodate both... + +#if !defined(__INT_MAX__) || (__INT_MAX__ > 0xFFFF) + #define pgm_read_pointer(addr) ((void *)pgm_read_dword(addr)) +#else + #define pgm_read_pointer(addr) ((void *)pgm_read_word(addr)) +#endif + +#ifndef min +#define min(a,b) (((a) < (b)) ? (a) : (b)) +#endif + +#ifndef _swap_int16_t +#define _swap_int16_t(a, b) { int16_t t = a; a = b; b = t; } +#endif + +Adafruit_GFX::Adafruit_GFX(int16_t w, int16_t h): + WIDTH(w), HEIGHT(h) +{ + _width = WIDTH; + _height = HEIGHT; + rotation = 0; + cursor_y = cursor_x = 0; + textsize = 1; + textcolor = textbgcolor = 0xFFFF; + wrap = true; + gfxFont = NULL; +} + +// 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_int16_t(x0, y0); + _swap_int16_t(x1, y1); + } + + if (x0 > x1) { + _swap_int16_t(x0, x1); + _swap_int16_t(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) { + // 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) { + // 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) { + // Update in subclasses if desired! + for (int16_t i=x; i<x+w; i++) { + drawFastVLine(i, y, h, 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_int16_t(y0, y1); _swap_int16_t(x0, x1); + } + if (y1 > y2) { + _swap_int16_t(y2, y1); _swap_int16_t(x2, x1); + } + if (y0 > y1) { + _swap_int16_t(y0, y1); _swap_int16_t(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; + int32_t + 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_int16_t(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_int16_t(a,b); + drawFastHLine(a, y, b-a+1, color); + } +} + + +// Draw a 1-bit image (bitmap) at the specified (x,y) position from the +// provided bitmap buffer using the specified +// foreground color (unset bits are transparent). +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; + uint8_t byte; + + for(j=0; j<h; j++) { + for(i=0; i<w; i++ ) { + if(i & 7) byte <<= 1; + else byte = bitmap[j * byteWidth + i / 8]; + if(byte & 0x80) drawPixel(x+i, y+j, color); + } + } +} + +// Draw a 1-bit image (bitmap) at the specified (x,y) position from the +// provided bitmap buffer using the specified +// foreground (for set bits) and background (for clear bits) colors. +void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, + const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color, uint16_t bg) { + + int16_t i, j, byteWidth = (w + 7) / 8; + uint8_t byte; + + for(j=0; j<h; j++) { + for(i=0; i<w; i++ ) { + if(i & 7) byte <<= 1; + else byte = bitmap[j * byteWidth + i / 8]; + if(byte & 0x80) drawPixel(x+i, y+j, color); + else drawPixel(x+i, y+j, bg); + } + } +} + +//Draw XBitMap Files (*.xbm), exported from GIMP, +//Usage: Export from GIMP to *.xbm, rename *.xbm to *.c and open in editor. +//C Array can be directly used with this function +void Adafruit_GFX::drawXBitmap(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; + uint8_t byte; + + for(j=0; j<h; j++) { + for(i=0; i<w; i++ ) { + if(i & 7) byte >>= 1; + else byte = pgm_read_byte(bitmap + j * byteWidth + i / 8); + if(byte & 0x01) drawPixel(x+i, y+j, color); + } + } +} + +size_t Adafruit_GFX::write(uint8_t c) { + if(!gfxFont) { // 'Classic' built-in font + + if(c == '\n') { + cursor_y += textsize*8; + cursor_x = 0; + } else if(c == '\r') { + // skip em + } else { + if(wrap && ((cursor_x + textsize * 6) >= _width)) { // Heading off edge? + cursor_x = 0; // Reset x to zero + cursor_y += textsize * 8; // Advance y one line + } + drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize); + cursor_x += textsize * 6; + } + + } else { // Custom font + + if(c == '\n') { + cursor_x = 0; + cursor_y += (int16_t)textsize * + (uint8_t)pgm_read_byte(&gfxFont->yAdvance); + } else if(c != '\r') { + uint8_t first = pgm_read_byte(&gfxFont->first); + if((c >= first) && (c <= (uint8_t)pgm_read_byte(&gfxFont->last))) { + uint8_t c2 = c - pgm_read_byte(&gfxFont->first); + GFXglyph *glyph = &(((GFXglyph *)pgm_read_pointer(&gfxFont->glyph))[c2]); + uint8_t w = pgm_read_byte(&glyph->width), + h = pgm_read_byte(&glyph->height); + if((w > 0) && (h > 0)) { // Is there an associated bitmap? + int16_t xo = (int8_t)pgm_read_byte(&glyph->xOffset); // sic + if(wrap && ((cursor_x + textsize * (xo + w)) >= _width)) { + // Drawing character would go off right edge; wrap to new line + cursor_x = 0; + cursor_y += (int16_t)textsize * + (uint8_t)pgm_read_byte(&gfxFont->yAdvance); + } + drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize); + } + cursor_x += pgm_read_byte(&glyph->xAdvance) * (int16_t)textsize; + } + } + + } + 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(!gfxFont) { // 'Classic' built-in font + + if((x >= _width) || // Clip right + (y >= _height) || // Clip bottom + ((x + 6 * 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 = pgm_read_byte(font+(c*5)+i); + else line = 0x0; + for(int8_t j=0; j<8; j++, line >>= 1) { + if(line & 0x1) { + if(size == 1) drawPixel(x+i, y+j, color); + else fillRect(x+(i*size), y+(j*size), size, size, color); + } else if(bg != color) { + if(size == 1) drawPixel(x+i, y+j, bg); + else fillRect(x+i*size, y+j*size, size, size, bg); + } + } + } + + } else { // Custom font + + // Character is assumed previously filtered by write() to eliminate + // newlines, returns, non-printable characters, etc. Calling drawChar() + // directly with 'bad' characters of font may cause mayhem! + + c -= pgm_read_byte(&gfxFont->first); + GFXglyph *glyph = &(((GFXglyph *)pgm_read_pointer(&gfxFont->glyph))[c]); + uint8_t *bitmap = (uint8_t *)pgm_read_pointer(&gfxFont->bitmap); + + uint16_t bo = pgm_read_word(&glyph->bitmapOffset); + uint8_t w = pgm_read_byte(&glyph->width), + h = pgm_read_byte(&glyph->height), + xa = pgm_read_byte(&glyph->xAdvance); + int8_t xo = pgm_read_byte(&glyph->xOffset); + int8_t yo = pgm_read_byte(&glyph->yOffset); + uint8_t xx, yy, bits, bit = 0; + int16_t xo16, yo16; + + if(size > 1) { + xo16 = xo; + yo16 = yo; + } + + // Todo: Add character clipping here + + // NOTE: THERE IS NO 'BACKGROUND' COLOR OPTION ON CUSTOM FONTS. + // THIS IS ON PURPOSE AND BY DESIGN. The background color feature + // has typically been used with the 'classic' font to overwrite old + // screen contents with new data. This ONLY works because the + // characters are a uniform size; it's not a sensible thing to do with + // proportionally-spaced fonts with glyphs of varying sizes (and that + // may overlap). To replace previously-drawn text when using a custom + // font, use the getTextBounds() function to determine the smallest + // rectangle encompassing a string, erase the area with fillRect(), + // then draw new text. This WILL infortunately 'blink' the text, but + // is unavoidable. Drawing 'background' pixels will NOT fix this, + // only creates a new set of problems. Have an idea to work around + // this (a canvas object type for MCUs that can afford the RAM and + // displays supporting setAddrWindow() and pushColors()), but haven't + // implemented this yet. + + for(yy=0; yy<h; yy++) { + for(xx=0; xx<w; xx++) { + if(!(bit++ & 7)) { + bits = pgm_read_byte(&bitmap[bo++]); + } + if(bits & 0x80) { + if(size == 1) { + drawPixel(x+xo+xx, y+yo+yy, color); + } else { + fillRect(x+(xo16+xx)*size, y+(yo16+yy)*size, size, size, color); + } + } + bits <<= 1; + } + } + + } // End classic vs custom font +} + +void Adafruit_GFX::setCursor(int16_t x, int16_t y) { + cursor_x = x; + cursor_y = y; +} + +int16_t Adafruit_GFX::getCursorX(void) const { + return cursor_x; +} + +int16_t Adafruit_GFX::getCursorY(void) const { + return cursor_y; +} + +void Adafruit_GFX::setTextSize(uint8_t s) { + textsize = (s > 0) ? s : 1; +} + +void Adafruit_GFX::setTextColor(uint16_t c) { + // For 'transparent' background, we'll set the bg + // to the same as fg instead of using a flag + textcolor = textbgcolor = c; +} + +void Adafruit_GFX::setTextColor(uint16_t c, uint16_t b) { + textcolor = c; + textbgcolor = b; +} + +void Adafruit_GFX::setTextWrap(bool w) { + wrap = w; +} + +uint8_t Adafruit_GFX::getRotation(void) const { + return rotation; +} + +void Adafruit_GFX::setRotation(uint8_t x) { + rotation = (x & 3); + switch(rotation) { + case 0: + case 2: + _width = WIDTH; + _height = HEIGHT; + break; + case 1: + case 3: + _width = HEIGHT; + _height = WIDTH; + break; + } +} + + +void Adafruit_GFX::setFont(const GFXfont *f) { + if(f) { // Font struct pointer passed in? + if(!gfxFont) { // And no current font struct? + // Switching from classic to new font behavior. + // Move cursor pos down 6 pixels so it's on baseline. + cursor_y += 6; + } + } else if(gfxFont) { // NULL passed. Current font struct defined? + // Switching from new to classic font behavior. + // Move cursor pos up 6 pixels so it's at top-left of char. + cursor_y -= 6; + } + gfxFont = (GFXfont *)f; +} + +// Pass string and a cursor position, returns UL corner and W,H. +void Adafruit_GFX::getTextBounds(char *str, int16_t x, int16_t y, + int16_t *x1, int16_t *y1, uint16_t *w, uint16_t *h) { + uint8_t c; // Current character + + *x1 = x; + *y1 = y; + *w = *h = 0; + + if(gfxFont) { + + GFXglyph *glyph; + uint8_t first = pgm_read_byte(&gfxFont->first), + last = pgm_read_byte(&gfxFont->last), + gw, gh, xa; + int8_t xo, yo; + int16_t minx = _width, miny = _height, maxx = -1, maxy = -1, + gx1, gy1, gx2, gy2, ts = (int16_t)textsize, + ya = ts * (uint8_t)pgm_read_byte(&gfxFont->yAdvance); + + while((c = *str++)) { + if(c != '\n') { // Not a newline + if(c != '\r') { // Not a carriage return, is normal char + if((c >= first) && (c <= last)) { // Char present in current font + c -= first; + glyph = &(((GFXglyph *)pgm_read_pointer(&gfxFont->glyph))[c]); + gw = pgm_read_byte(&glyph->width); + gh = pgm_read_byte(&glyph->height); + xa = pgm_read_byte(&glyph->xAdvance); + xo = pgm_read_byte(&glyph->xOffset); + yo = pgm_read_byte(&glyph->yOffset); + if(wrap && ((x + (((int16_t)xo + gw) * ts)) >= _width)) { + // Line wrap + x = 0; // Reset x to 0 + y += ya; // Advance y by 1 line + } + gx1 = x + xo * ts; + gy1 = y + yo * ts; + gx2 = gx1 + gw * ts - 1; + gy2 = gy1 + gh * ts - 1; + if(gx1 < minx) minx = gx1; + if(gy1 < miny) miny = gy1; + if(gx2 > maxx) maxx = gx2; + if(gy2 > maxy) maxy = gy2; + x += xa * ts; + } + } // Carriage return = do nothing + } else { // Newline + x = 0; // Reset x + y += ya; // Advance y by 1 line + } + } + // End of string + *x1 = minx; + *y1 = miny; + if(maxx >= minx) *w = maxx - minx + 1; + if(maxy >= miny) *h = maxy - miny + 1; + + } else { // Default font + + uint16_t lineWidth = 0, maxWidth = 0; // Width of current, all lines + + while((c = *str++)) { + if(c != '\n') { // Not a newline + if(c != '\r') { // Not a carriage return, is normal char + if(wrap && ((x + textsize * 6) >= _width)) { + x = 0; // Reset x to 0 + y += textsize * 8; // Advance y by 1 line + if(lineWidth > maxWidth) maxWidth = lineWidth; // Save widest line + lineWidth = textsize * 6; // First char on new line + } else { // No line wrap, just keep incrementing X + lineWidth += textsize * 6; // Includes interchar x gap + } + } // Carriage return = do nothing + } else { // Newline + x = 0; // Reset x to 0 + y += textsize * 8; // Advance y by 1 line + if(lineWidth > maxWidth) maxWidth = lineWidth; // Save widest line + lineWidth = 0; // Reset lineWidth for new line + } + } + // End of string + if(lineWidth) y += textsize * 8; // Add height of last (or only) line + if(lineWidth > maxWidth) maxWidth = lineWidth; // Is the last or only line the widest? + *w = maxWidth - 1; // Don't include last interchar x gap + *h = y - *y1; + + } // End classic vs custom font +} + + + +void Adafruit_GFX::print(const char* str) { + const char* p = str; + while (*p!=0) + write(*p++); +} + +void Adafruit_GFX::println(const char* str) { + print(str); + write('\n'); +} + +// Return the size of the display (per current rotation) +int16_t Adafruit_GFX::width(void) const { + return _width; +} + +int16_t Adafruit_GFX::height(void) const { + return _height; +} + +void Adafruit_GFX::invertDisplay(bool i) { + // Do nothing, must be subclassed if supported by hardware +} + + +/***************************************************************************/ +