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Pixels.cpp
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Pixels.cpp
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/*
Pixels. Graphics library for TFT displays.
Copyright (C) 2012-2013 Igor Repinetski
The code is written in C/C++ for Arduino and can be easily ported to any microcontroller by rewritting the low level pin access functions.
Text output methods of the library rely on Pixelmeister's font data format. See: http://pd4ml.com/pixelmeister
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
This library includes some code portions and algoritmic ideas derived from works of
- Andreas Schiffler -- aschiffler at ferzkopp dot net (SDL_gfx Project)
- K. Townsend http://microBuilder.eu (lpc1343codebase Project)
*/
#include "Pixels.h"
PRGB::PRGB(uint8_t r, uint8_t g, uint8_t b)
{
red = r;
green = g;
blue = b;
}
PRGB::PRGB()
{
}
PRGB PRGB::convert565toRGB(uint16_t color)
{
uint8_t r = ((0xf800 & color) >> 11) * 255 / 31;
uint8_t g = ((0x7e0 & color) >> 5) * 255 / 63;
uint8_t b = (0x1f & color) * 255 / 31;
return PRGB(r, g, b);
}
uint16_t PRGB::convertRGBto565(PRGB color)
{
return ((color.red / 8) << 11) | ((color.green / 4) << 5) | (color.blue / 8);
}
uint16_t PRGB::convertTo565()
{
return ((red / 8) << 11) | ((green / 4) << 5) | (blue / 8);
}
regtype *registerCS; // chip select
regsize bitmaskCS;
PixelsBase::PixelsBase(uint16_t width, uint16_t height)
{
deviceWidth = width < height ? width : height;
deviceHeight = width > height ? width : height;
this->width = width;
this->height = height;
orientation = width > height ? LANDSCAPE : PORTRAIT;
relativeOrigin = true;
currentScroll = 0;
scrollSupported = true;
scrollEnabled = true;
lineWidth = 1;
fillDirection = 0;
computedBgColor = new PRGB(0, 0, 0);
computedFgColor = new PRGB(0, 0, 0);
bgBuffer = new PRGB(0, 0, 0);
fgBuffer = new PRGB(0, 0, 0);
setBackground(0, 0, 0);
setColor(0xFF, 0xFF, 0xFF);
}
void PixelsBase::setOrientation(uint8_t direction)
{
orientation = direction;
landscape = false;
switch (orientation)
{
case LANDSCAPE_FLIP:
case LANDSCAPE:
width = deviceHeight;
height = deviceWidth;
landscape = true;
break;
case PORTRAIT_FLIP:
width = deviceWidth;
height = deviceHeight;
break;
default:
width = deviceWidth;
height = deviceHeight;
orientation = PORTRAIT;
break;
}
}
/* Graphic primitives */
void PixelsBase::clear()
{
PRGB* sav = getColor();
setColor(background);
fillRectangle(0, 0, width, height);
setColor(sav);
}
PRGB* PixelsBase::getPixel(int16_t x, int16_t y)
{
return getBackground();
}
void PixelsBase::drawLine(int16_t x1, int16_t y1, int16_t x2, int16_t y2)
{
if (y1 == y2 && lineWidth == 1)
{
hLine(x1, y1, x2);
}
else if (x1 == x2 && lineWidth == 1)
{
vLine(x1, y1, y2);
}
else
{
if (lineWidth == 1)
{
if (antialiasing)
{
drawLineAntialiased(x1, y1, x2, y2);
}
else
{
int16_t dx;
int16_t dy;
int16_t sx;
int16_t sy;
if (x2 > x1)
{
dx = x2 - x1;
sx = 1;
}
else
{
dx = x1 - x2;
sx = -1;
}
if (y2 > y1)
{
dy = y2 - y1;
sy = 1;
}
else
{
dy = y1 - y2;
sy = -1;
}
int16_t x = x1;
int16_t y = y1;
int16_t err = dx - dy;
int16_t e2;
while (true)
{
drawPixel(x, y);
if (x == x2 && y == y2)
{
break;
}
e2 = err << 1;
if (e2 > -dy)
{
err = err - dy;
x = x + sx;
}
if (e2 < dx)
{
err = err + dx;
y = y + sy;
}
}
}
}
else
{
drawFatLineAntialiased(x1, y1, x2, y2);
}
}
}
void PixelsBase::drawRectangle(int16_t x, int16_t y, int16_t width, int16_t height)
{
hLine(x, y, x + width - 2);
vLine(x + width - 1, y, y + height - 2);
hLine(x + 1, y + height - 1, x + width - 1);
vLine(x, y + 1, y + height - 1);
}
void PixelsBase::fillRectangle(int16_t x, int16_t y, int16_t width, int16_t height)
{
fill(foreground->convertTo565(), x, y, x + width - 1, y + height - 1);
}
void PixelsBase::drawRoundRectangle(int16_t x, int16_t y, int16_t width, int16_t height, int16_t radius)
{
if (radius < 1)
{
drawRectangle(x, y, width, height);
return;
}
if (radius > height >> 2)
{
radius = height >> 2;
}
if (radius > width >> 1)
{
radius = width >> 1;
}
if (antialiasing)
{
drawRoundRectangleAntialiased(x, y, width, height, radius, radius, 0);
}
else
{
height--;
width--;
hLine(x + radius, y + height, x + width - radius);
hLine(x + radius, y, x + width - radius);
vLine(x + width, y + radius, y + height - radius);
vLine(x, y + radius, y + height - radius);
int16_t shiftX = width - (radius << 1);
int16_t shiftY = height - (radius << 1);
int16_t f = 1 - radius;
int16_t ddF_x = 1;
int16_t ddF_y = - (radius << 1);
int16_t x1 = 0;
int16_t y1 = radius;
int16_t xx = x + radius;
int16_t yy = y + radius;
while (x1 < y1)
{
if (f >= 0)
{
y1--;
ddF_y += 2;
f += ddF_y;
}
x1++;
ddF_x += 2;
f += ddF_x;
drawPixel(xx + x1 + shiftX, yy + y1 + shiftY);
drawPixel(xx - x1, yy + y1 + shiftY);
drawPixel(xx + x1 + shiftX, yy - y1);
drawPixel(xx - x1, yy - y1);
drawPixel(xx + y1 + shiftX, yy + x1 + shiftY);
drawPixel(xx - y1, yy + x1 + shiftY);
drawPixel(xx + y1 + shiftX, yy - x1);
drawPixel(xx - y1, yy - x1);
}
}
}
void PixelsBase::fillRoundRectangle(int16_t x, int16_t y, int16_t width, int16_t height, int16_t radius)
{
if (radius < 1)
{
fillRectangle(x, y, width, height);
return;
}
if (radius > height >> 1)
{
radius = height >> 1;
}
if (radius > width >> 1)
{
radius = width >> 1;
}
if (antialiasing)
{
drawRoundRectangleAntialiased(x, y, width - 1, height - 1, radius, radius, true);
}
fillRectangle(x + radius, y + height - radius, width - (radius << 1), radius);
fillRectangle(x, y + radius, width, height - (radius << 1));
fillRectangle(x + radius, y, width - (radius << 1), radius);
height--;
width--;
int16_t shiftX = width - (radius << 1);
int16_t shiftY = height - (radius << 1);
int16_t f = 1 - radius;
int16_t ddF_x = 1;
int16_t ddF_y = -(radius << 1);
int16_t x1 = 0;
int16_t y1 = radius;
int16_t xx = x + radius;
int16_t yy = y + radius;
while (x1 < y1)
{
if (f >= 0)
{
y1--;
ddF_y += 2;
f += ddF_y;
}
x1++;
ddF_x += 2;
f += ddF_x;
hLine(xx + shiftX, yy - y1, xx + shiftX + x1);
hLine(xx - x1, yy - y1, xx);
hLine(xx + shiftX, yy - x1, xx + shiftX + y1);
hLine(xx - y1, yy - x1, xx);
hLine(xx + shiftX, yy + y1 + shiftY, xx + x1 + shiftX);
hLine(xx + shiftX, yy + x1 + shiftY, xx + shiftX + y1);
hLine(xx - x1, yy + y1 + shiftY, xx);
hLine(xx - y1, yy + x1 + shiftY, xx);
}
}
void PixelsBase::drawCircle(int16_t x, int16_t y, int16_t r)
{
drawOval(x - r, y - r, x + r, y - r);
// if ( antialiasing ) {
// drawCircleAntialiaced(x, y, r, false);
// } else {
// int16_t f = 1 - r;
// int16_t ddF_x = 1;
// int16_t ddF_y = -2 * r;
// int16_t x1 = 0;
// int16_t y1 = r;
// drawPixel(x, y + r);
// drawPixel(x, y - r);
// drawPixel(x + r, y);
// drawPixel(x - r, y);
// while (x1 < y1) {
// if (f >= 0) {
// y1--;
// ddF_y += 2;
// f += ddF_y;
// }
// x1++;
// ddF_x += 2;
// f += ddF_x;
// drawPixel(x + x1, y + y1);
// drawPixel(x - x1, y + y1);
// drawPixel(x + x1, y - y1);
// drawPixel(x - x1, y - y1);
// drawPixel(x + y1, y + x1);
// drawPixel(x - y1, y + x1);
// drawPixel(x + y1, y - x1);
// drawPixel(x - y1, y - x1);
// }
// }
}
void PixelsBase::fillCircle(int16_t x, int16_t y, int16_t r)
{
int16_t yy;
int16_t xx;
fillOval(x - r, y - r, x + r, y - r);
// if ( antialiasing ) {
// drawCircleAntialiaced(x, y, r, true);
// }
// for (yy = -r; yy <= r; yy++) {
// for (xx = -r; xx <= r; xx++) {
// if ((xx * xx) + (yy * yy) <= (r * r)) {
// drawPixel(x+xx, y+yy);
// }
// }
// }
}
void PixelsBase::drawOval(int16_t x, int16_t y, int16_t width, int16_t height)
{
if (antialiasing)
{
drawRoundRectangleAntialiased(x, y, width, height, width / 2, height / 2, 0);
}
else
{
height--;
width--;
int16_t ix, iy;
int16_t h, i, j, k;
int16_t oh, oi, oj, ok;
int16_t xmh, xph, ypk, ymk;
int16_t xmi, xpi, ymj, ypj;
int16_t xmj, xpj, ymi, ypi;
int16_t xmk, xpk, ymh, yph;
int16_t rx = width / 2;
int16_t ry = height / 2;
int16_t xx = x + rx;
int16_t yy = y + ry;
if ((width <= 0) || (height <= 0))
{
return;
}
if (width == 1)
{
vLine(xx, yy, yy + height - 1);
return;
}
if (height == 1)
{
hLine(xx, yy, xx + width - 1);
return;
}
oh = oi = oj = ok = 0xFFFF;
if (width > height)
{
ix = 0;
iy = rx << 6;
do
{
h = (ix + 32) >> 6;
i = (iy + 32) >> 6;
j = (h * ry) / rx;
k = (i * ry) / rx;
if (((ok != k) && (oj != k)) || ((oj != j) && (ok != j)) || (k != j))
{
xph = xx + h;
xmh = xx - h;
if (k > 0)
{
ypk = yy + k;
ymk = yy - k;
drawPixel(xmh, ypk);
drawPixel(xph, ypk);
drawPixel(xmh, ymk);
drawPixel(xph, ymk);
}
else
{
drawPixel(xmh, yy);
drawPixel(xph, yy);
}
ok = k;
xpi = xx + i;
xmi = xx - i;
if (j > 0)
{
ypj = yy + j;
ymj = yy - j;
drawPixel(xmi, ypj);
drawPixel(xpi, ypj);
drawPixel(xmi, ymj);
drawPixel(xpi, ymj);
}
else
{
drawPixel(xmi, yy);
drawPixel(xpi, yy);
}
oj = j;
}
ix = ix + iy / rx;
iy = iy - ix / rx;
}
while (i > h);
}
else
{
ix = 0;
iy = ry << 6;
do
{
h = (ix + 32) >> 6;
i = (iy + 32) >> 6;
j = (h * rx) / ry;
k = (i * rx) / ry;
if (((oi != i) && (oh != i)) || ((oh != h) && (oi != h) && (i != h)))
{
xmj = xx - j;
xpj = xx + j;
if (i > 0)
{
ypi = yy + i;
ymi = yy - i;
drawPixel(xmj, ypi);
drawPixel(xpj, ypi);
drawPixel(xmj, ymi);
drawPixel(xpj, ymi);
}
else
{
drawPixel(xmj, yy);
drawPixel(xpj, yy);
}
oi = i;
xmk = xx - k;
xpk = xx + k;
if (h > 0)
{
yph = yy + h;
ymh = yy - h;
drawPixel(xmk, yph);
drawPixel(xpk, yph);
drawPixel(xmk, ymh);
drawPixel(xpk, ymh);
}
else
{
drawPixel(xmk, yy);
drawPixel(xpk, yy);
}
oh = h;
}
ix = ix + iy / ry;
iy = iy - ix / ry;
}
while (i > h);
}
}
}
void PixelsBase::fillOval(int16_t xx, int16_t yy, int16_t width, int16_t height)
{
height--;
width--;
int16_t rx = width / 2;
int16_t ry = height / 2;
int16_t x = xx + rx;
int16_t y = yy + ry;
int16_t ix, iy;
int16_t h, i, j, k;
int16_t oh, oi, oj, ok;
int16_t xmh, xph;
int16_t xmi, xpi;
int16_t xmj, xpj;
int16_t xmk, xpk;
if ((rx < 0) || (ry < 0))
{
return;
}
if (width < 2)
{
vLine(xx, yy, yy + height);
return;
}
if (height < 2)
{
hLine(xx, yy, xx + width);
return;
}
if (antialiasing)
{
drawRoundRectangleAntialiased(x - rx, y - ry, rx << 1, ry << 1, rx, ry, true);
}
oh = oi = oj = ok = 0xFFFF;
if (rx > ry)
{
ix = 0;
iy = rx << 6;
do
{
h = (ix + 32) >> 6;
i = (iy + 32) >> 6;
j = (h * ry) / rx;
k = (i * ry) / rx;
if ((ok != k) && (oj != k))
{
xph = x + h;
xmh = x - h;
if (k > 0)
{
hLine(xmh, y + k, xph);
hLine(xmh, y - k, xph);
}
else
{
hLine(xmh, y, xph);
}
ok = k;
}
if ((oj != j) && (ok != j) && (k != j))
{
xmi = x - i;
xpi = x + i;
if (j > 0)
{
hLine(xmi, y + j, xpi);
hLine(xmi, y - j, xpi);
}
else
{
hLine(xmi, y, xpi);
}
oj = j;
}
ix = ix + iy / rx;
iy = iy - ix / rx;
}
while (i > h);
}
else
{
ix = 0;
iy = ry << 6;
do
{
h = (ix + 32) >> 6;
i = (iy + 32) >> 6;
j = (h * rx) / ry;
k = (i * rx) / ry;
if ((oi != i) && (oh != i))
{
xmj = x - j;
xpj = x + j;
if (i > 0)
{
hLine(xmj, y + i, xpj);
hLine(xmj, y - i, xpj);
}
else
{
hLine(xmj, y, xpj);
}
oi = i;
}
if ((oh != h) && (oi != h) && (i != h))
{
xmk = x - k;
xpk = x + k;
if (h > 0)
{
hLine(xmk, y + h, xpk);
hLine(xmk, y - h, xpk);
}
else
{
hLine(xmk, y, xpk);
}
oh = h;
}
ix = ix + iy / ry;
iy = iy - ix / ry;
}
while (i > h);
}
}
void PixelsBase::drawIcon(int16_t xx, int16_t yy, prog_uchar* data)
{
int16_t fontType = BITMASK_FONT;
if (pgm_read_byte_near(data + 1) == 'a')
{
fontType = ANTIALIASED_FONT;
}
int16_t length = ((0xFF & (int32_t)pgm_read_byte_near(data + 2)) << 8) + (0xFF & (int32_t)pgm_read_byte_near(data + 3));
int16_t height = pgm_read_byte_near(data + 4);
drawGlyph(fontType, false, xx, yy, height, data, 1, length - 1);
}
void PixelsBase::cleanIcon(int16_t xx, int16_t yy, prog_uchar* data)
{
int16_t fontType = BITMASK_FONT;
if (pgm_read_byte_near(data + 1) == 'a')
{
fontType = ANTIALIASED_FONT;
}
int16_t length = ((0xFF & (int32_t)pgm_read_byte_near(data + 2)) << 8) + (0xFF & (int32_t)pgm_read_byte_near(data + 3));
int16_t height = pgm_read_byte_near(data + 4);
drawGlyph(fontType, true, xx, yy, height, data, 1, length - 1);
}
int8_t PixelsBase::drawBitmap(int16_t x, int16_t y, int16_t width, int16_t height, prog_uint16_t* data)
{
chipSelect();
setRegion(x, y, x + width - 1, y + height - 1);
switch (orientation)
{
case PORTRAIT:
{
int32_t ptr = 0;
int32_t size = width * height;
while (ptr++ < size)
{
int16_t px = pgm_read_word_near(data + ptr);
setCurrentPixel(px);
}
}
break;
case LANDSCAPE_FLIP:
for (int16_t i = width - 1; i >= 0; i--)
{
for (int16_t j = 0; j < height; j++)
{
int16_t px = pgm_read_word_near(data + j * width + i);
setCurrentPixel(px);
}
}
break;
case LANDSCAPE:
for (int16_t i = 0; i < width; i++)
{
for (int16_t j = height - 1; j >= 0; j--)
{
int16_t px = pgm_read_word_near(data + j * width + i);
setCurrentPixel(px);
}
}
break;
case PORTRAIT_FLIP:
{
int32_t ptr = width * height;
while (ptr-- >= 0)
{
int16_t px = pgm_read_word_near(data + ptr);
setCurrentPixel(px);
}
}
break;
}
chipDeselect();
return 0;
}
int8_t PixelsBase::drawCompressedBitmap(int16_t x, int16_t y, uint8_t* data)
{
if (data == NULL)
{
return -1;
}
if (pgm_read_byte_near(data + 0) != 'Z')
{
// Unknown compression method
return -2;
}
int32_t compressedLen = ((0xFF & (int32_t)pgm_read_byte_near(data + 1)) << 16) + ((0xFF & (int32_t)pgm_read_byte_near(data + 2)) << 8) + (0xFF & (int32_t)pgm_read_byte_near(data + 3));
if (compressedLen < 0)
{
// Unknown compression method or compressed data inconsistence
return -3;
}
int32_t resultLen = ((0xFF & (int32_t)pgm_read_byte_near(data + 4)) << 16) + ((0xFF & (int32_t)pgm_read_byte_near(data + 5)) << 8) + (0xFF & (int32_t)pgm_read_byte_near(data + 6));
if (resultLen < 0)
{
// Unknown compression method or compression format error
return resultLen;
}
uint8_t windowLen = 0xFF & (int16_t)pgm_read_byte_near(data + 7);
if (windowLen < 0 || windowLen > 254)
{
// corrupted content
return -5;
}
int16_t width = ((0xFF & (int32_t)pgm_read_byte_near(data + 8)) << 8) + (0xFF & (int32_t)pgm_read_byte_near(data + 9));
if (width < 0)
{
// Unknown compression method or compression format error (width parameter is invalid)
return -6;
}
int16_t height = ((0xFF & (int32_t)pgm_read_byte_near(data + 10)) << 8) + (0xFF & (int32_t)pgm_read_byte_near(data + 11));
if (height < 0)
{
// Unknown compression method or compression format error (height parameter is invalid)
return -7;
}
uint8_t window[windowLen];
int16_t wptr = 0;
int32_t ctr = 0;
uint8_t buf;
bool bufEmpty = true;
int* raster;
int rasterPtr = 0;
int rasterLine = 0;
if (orientation != PORTRAIT)
{
raster = new int[width];
}
chipSelect();
if (orientation == PORTRAIT)
{
setRegion(x, y, x + width - 1, y + height - 1);
}
else
{
rasterLine = y;
}
BitStream bs(data, compressedLen, 96);
while (true)
{
uint8_t bit = bs.readBit();
if (bit == 0) // literal
{
uint8_t bits = bs.readBits(8);
if (bufEmpty)
{
buf = bits;
bufEmpty = false;
}
else
{
uint16_t px = buf;
px <<= 8;
px |= bits;
if (orientation == PORTRAIT)
{
setCurrentPixel(px);
}
else
{
raster[rasterPtr++] = px;
if (rasterPtr == width)
{
setRegion(x, rasterLine, x + width - 1, rasterLine);
rasterLine++;
if (orientation == LANDSCAPE)
{
for (int i = 0; i < width; i++)
{
setCurrentPixel(raster[i]);
}
}
else
{
for (int i = width - 1; i >= 0; i--)
{
setCurrentPixel(raster[i]);
}
}
rasterPtr = 0;
}
}
bufEmpty = true;
}
ctr++;
window[wptr++] = bits;
if (wptr >= windowLen)
{
wptr -= windowLen;
}
}
else
{
uint8_t offset = (uint8_t)bs.readNumber() - 1;
uint8_t matchCount = (uint8_t)bs.readNumber() - 1;
while (matchCount-- > 0)
{
int16_t p1 = wptr - offset;
while (p1 < 0)
{
p1 += windowLen;
}
while (p1 >= windowLen)
{
p1 -= windowLen;
}
int16_t p2 = wptr;
while (p2 >= windowLen)
{
p2 -= windowLen;
}
wptr++;
ctr++;
if (bufEmpty)
{
buf = window[p1];
bufEmpty = false;
}
else
{
uint16_t px = buf;
px <<= 8;
px |= window[p1];
if (orientation == PORTRAIT)
{
setCurrentPixel(px);
}
else
{
raster[rasterPtr++] = px;
if (rasterPtr == width)
{
setRegion(x, rasterLine, x + width - 1, rasterLine);
rasterLine++;
if (orientation == LANDSCAPE)
{
for (int i = 0; i < width; i++)
{
setCurrentPixel(raster[i]);
}
}
else
{
for (int i = width - 1; i >= 0; i--)
{
setCurrentPixel(raster[i]);
}
}
rasterPtr = 0;
}
}
bufEmpty = true;
}
window[p2] = window[p1];
}
while (wptr >= windowLen)
{
wptr -= windowLen;
}
}
if (ctr > resultLen)
{
break;
}