protected function _getColor(Image_3D_Color $color, $alpha = 1.0)
{
$values = $color->getValues();
$values[0] = (int) round($values[0] * 255);
$values[1] = (int) round($values[1] * 255);
$values[2] = (int) round($values[2] * 255);
$values[3] = (int) round((1 - (1 - $values[3]) * $alpha) * 127);
if ($values[3] > 0) {
// Tranzparente Farbe allokieren
$color = imageColorExactAlpha($this->_image, $values[0], $values[1], $values[2], $values[3]);
if ($color === -1) {
// Wenn nicht Farbe neu alloziieren
$color = imageColorAllocateAlpha($this->_image, $values[0], $values[1], $values[2], $values[3]);
}
} else {
// Deckende Farbe allozieren
$color = imageColorExact($this->_image, $values[0], $values[1], $values[2]);
if ($color === -1) {
// Wenn nicht Farbe neu alloziieren
$color = imageColorAllocate($this->_image, $values[0], $values[1], $values[2]);
}
}
return $color;
}
function drawPieFade($img, $centerX, $centerY, $elWidth, $elHeight, $arcStart, $arcEnd, $hexadecimalStartColor, $hexadecimalEndColor)
{
$this->chartDiameter;
$startColor = $this->getRGBColor($hexadecimalStartColor);
$redStartColor = $startColor["red"];
$greenStartColor = $startColor["green"];
$blueStartColor = $startColor["blue"];
$endColor = $this->getRGBColor($hexadecimalEndColor);
$redEndColor = $endColor["red"];
$greenEndColor = $endColor["green"];
$blueEndColor = $endColor["blue"];
$redSteps = $this->calculateDifference($redStartColor, $redEndColor);
$greenSteps = $this->calculateDifference($greenStartColor, $greenEndColor);
$blueSteps = $this->calculateDifference($blueStartColor, $blueEndColor);
$redStep = $redSteps / ($arcEnd - $arcStart);
$greenStep = $greenSteps / ($arcEnd - $arcStart);
$blueStep = $blueSteps / ($arcEnd - $arcStart);
$steps = round($this->chartDiameter / 4);
$mx = $this->chartDiameter / 2;
$i = ceil($mx / 4);
while ($i--) {
$color = imageColorExact($img, $this->getFadeColor($redStartColor, $redEndColor, $i, $redStep), $this->getFadeColor($greenStartColor, $greenEndColor, $i, $greenStep), $this->getFadeColor($blueStartColor, $blueEndColor, $i, $blueStep));
// check for duplicate colors, don't allocate them
if ($color == -1) {
$color = ImageColorAllocate($img, $this->getFadeColor($redStartColor, $redEndColor, $i, $redStep), $this->getFadeColor($greenStartColor, $greenEndColor, $i, $greenStep), $this->getFadeColor($blueStartColor, $blueEndColor, $i, $blueStep));
}
//draw arc
imagearc($img, $this->chartCenterX, $this->chartCenterY, $mx - $i, $mx - $i, $arcStart, $arcEnd, $color);
//draw start line from center
list($ArcX, $ArcY) = $this->circle_point($arcStart, $mx - $i);
imageline($img, $this->chartCenterX, $this->chartCenterY, floor($this->chartCenterX + $ArcX), floor($this->chartCenterY + $ArcY), $color);
//draw end line from center
list($ArcX, $ArcY) = $this->circle_point($arcEnd, $mx - $i);
imageline($img, $this->chartCenterX, $this->chartCenterY, ceil($this->chartCenterX + $ArcX), ceil($this->chartCenterY + $ArcY), $color);
//fill slice
$MidPoint = round(($arcEnd - $arcStart) / 2 + $arcStart);
list($ArcX, $ArcY) = $this->circle_point($MidPoint, ($mx - $i) / 2);
//imagefilltoborder($img, floor($this->chartCenterX + $ArcX), floor($this->chartCenterY + $ArcY), $color,$color);
}
}
function drawBackgroundFade($img, $x1, $y1, $x2, $y2, $hexadecimalStartColor, $hexadecimalEndColor, $fadeDirection = FADE_VERTICAL)
{
$height = $y2;
$width = $x2;
// echo $hexadecimalStartColor, ' ' , $hexadecimalEndColor , '<br />';
$startColor = $this->getRGBColor($hexadecimalStartColor);
$redStartColor = $startColor["red"];
$greenStartColor = $startColor["green"];
$blueStartColor = $startColor["blue"];
$endColor = $this->getRGBColor($hexadecimalEndColor);
$redEndColor = $endColor["red"];
$greenEndColor = $endColor["green"];
$blueEndColor = $endColor["blue"];
$redSteps = $this->calculateDifference($redStartColor, $redEndColor);
$greenSteps = $this->calculateDifference($greenStartColor, $greenEndColor);
$blueSteps = $this->calculateDifference($blueStartColor, $blueEndColor);
if ($fadeDirection == FADE_HORIZONTAL) {
// height of each individual color block
$redStep = $redSteps / $height;
$greenStep = $greenSteps / $height;
$blueStep = $blueSteps / $height;
$i = $height;
while ($i > 0) {
$color = imageColorExact($img, $this->getFadeColor($redStartColor, $redEndColor, $i, $redStep), $this->getFadeColor($greenStartColor, $greenEndColor, $i, $greenStep), $this->getFadeColor($blueStartColor, $blueEndColor, $i, $blueStep));
// check for duplicate colors, don't allocate them
if ($color == -1) {
$color = ImageColorAllocate($img, $this->getFadeColor($redStartColor, $redEndColor, $i, $redStep), $this->getFadeColor($greenStartColor, $greenEndColor, $i, $greenStep), $this->getFadeColor($blueStartColor, $blueEndColor, $i, $blueStep));
}
imageLine($img, $x1, $i + $y1, $x1 + $width, $i + $y1, $color);
$i--;
}
} else {
// height of each individual color block
$redStep = $redSteps / $width;
$greenStep = $greenSteps / $width;
$blueStep = $blueSteps / $width;
$i = $width;
while ($i > 0) {
$color = imageColorExact($img, $this->getFadeColor($redStartColor, $redEndColor, $i, $redStep), $this->getFadeColor($greenStartColor, $greenEndColor, $i, $greenStep), $this->getFadeColor($blueStartColor, $blueEndColor, $i, $blueStep));
// check for duplicate colors, don't allocate them
if ($color == -1) {
$color = ImageColorAllocate($img, $this->getFadeColor($redStartColor, $redEndColor, $i, $redStep), $this->getFadeColor($greenStartColor, $greenEndColor, $i, $greenStep), $this->getFadeColor($blueStartColor, $blueEndColor, $i, $blueStep));
}
imageLine($img, $i + $x1, $y1, $x1 + $i, $height + $y1, $color);
$i--;
}
}
}
