public function draw($canvasBuffer)
{
//Calculate current FPS
if ($this->currentSecond != time()) {
$this->fps = $this->framesInSecond;
$this->currentSecond = time();
$this->framesInSecond = 1;
} else {
++$this->framesInSecond;
}
//If the last frame changed, we draw
// @TODO - The FPS will be wrong, need to find a way to update
// without redraw
if ($canvasBuffer != $this->lastFrameCanvasBuffer) {
// Array with all braille chars of the frame, filled with the blank char
// 2880 = total braille chars per frame
$chars = array_fill(0, 2880, $this->brailleCharOffset);
// Turn on the first and last pixels
$chars[0] |= $this->pixelMap[0][0];
$chars[2879] |= $this->pixelMap[0][0];
// Frame string - It's a big braille chars string
$frame = '';
for ($y = 0; $y < 144; $y++) {
for ($x = 0; $x < 160; $x++) {
$pixelCanvasNumber = $x + 160 * $y;
$charPosition = floor($x / 2) + floor($y / 4) * 80;
if (isset($canvasBuffer[$pixelCanvasNumber]) && $canvasBuffer[$pixelCanvasNumber]) {
$chars[$charPosition] |= $this->pixelMap[$y % 4][$x % 2];
}
// Each braille frame has 8 pixels, when we reach the last pixel,
// we can append to the frame string
if ($x % 2 === 1 && $y % 4 === 3) {
$frame .= $chars[$charPosition];
if ($x % 159 === 0) {
$frame .= PHP_EOL;
}
}
}
}
$this->lastFrame = $frame;
$this->lastFrameCanvasBuffer = $canvasBuffer;
$content = "[H[2J";
if ($this->height > 0 && $this->width > 0) {
$content = "[{$this->height}A[{$this->width}D";
}
$content .= sprintf('FPS: %3d - Frame Skip: %3d' . PHP_EOL, $this->fps, Settings::$frameskipAmout) . $frame;
echo $content;
$this->height = 37;
$this->width = 80;
}
}
