public function generateMaybeCroppedImage(Image_Backend $backend, $width, $height)
{
if ($width > 0 && $height > 0) {
return $backend->croppedResize($width, $height);
} elseif ($width > 0) {
return $backend->resizeByWidth($width);
} elseif ($height > 0) {
return $backend->resizeByHeight($height);
} else {
return $backend;
}
}
/**
* Resize this Image by width, keeping aspect ratio. Use in templates with $SetWidth.
*
* @param Image_Backend $backend
* @param int $width The width to set
* @return Image_Backend
* @deprecated 4.0 Use generateScaleWidth instead
*/
public function generateSetWidth(Image_Backend $backend, $width)
{
Deprecation::notice('4.0', 'Use generateScaleWidth instead');
return $backend->resizeByWidth($width);
}
/**
* Resize this Image by width, keeping aspect ratio. Use in templates with $SetWidth.
*
* @param Image_Backend $backend
* @param type $width The width to set
* @return Image_Backend
*/
public function generateSetWidth(Image_Backend $backend, $width)
{
return $backend->resizeByWidth($width);
}
/**
*
*
* @param Image_Backend $backend
* @param integer $width Width to crop to
* @param integer $height Height to crop to
* @return Image_Backend
*/
public function generateCroppedFocusedImage(Image_Backend $backend, $width, $height, $cropAxis, $cropOffset)
{
if ($cropAxis == 'x') {
//Generate image
return $backend->resizeByHeight($height)->crop(0, $cropOffset, $width, $height);
} else {
if ($cropAxis == 'y') {
//Generate image
return $backend->resizeByWidth($width)->crop($cropOffset, 0, $width, $height);
} else {
//Generate image without cropping
return $backend->resize($width, $height);
}
}
}
/**
* Resize this Image by width, keeping aspect ratio. Use in templates with $SetWidth.
*
* @param Image_Backend $backend
* @param int $width The width to set
* @return Image_Backend
* @deprecated 4.0 Generate methods are no longer applicable
*/
public function generateSetWidth(Image_Backend $backend, $width)
{
Deprecation::notice('4.0', 'Generate methods are no longer applicable');
return $backend->resizeByWidth($width);
}
/**
* Generate a resized copy of this image with the given width & height, cropping to maintain aspect ratio and focus point.
* Use in templates with $CroppedFocusedImage
*
* @param Image_Backend $backend
* @param integer $width Width to crop to
* @param integer $height Height to crop to
* @return Image_Backend
*/
public function generateCroppedFocusedImage(Image_Backend $backend, $width, $height)
{
$width = round($width);
$height = round($height);
$top = 0;
$left = 0;
$originalWidth = $this->owner->width;
$originalHeight = $this->owner->height;
if ($this->owner->width > 0 && $this->owner->height > 0) {
//Can't divide by zero
//Which is over by more?
$widthRatio = $originalWidth / $width;
$heightRatio = $originalHeight / $height;
//Calculate offset required
if ($widthRatio > $heightRatio) {
//Left and/or right of image will be lost
//target center in px
$croppedCenterX = floor($width / 2);
//X axis focus point of scaled image in px
$focusFactorX = ($this->owner->FocusX + 1) / 2;
//i.e .333 = one third along
$scaledImageWidth = floor($originalWidth / $heightRatio);
$focusX = floor($focusFactorX * $scaledImageWidth);
//Calculate difference beetween focus point and center
$focusOffsetX = $focusX - $croppedCenterX;
//Reduce offset if necessary so image remains filled
$xRemainder = $scaledImageWidth - $focusX;
$croppedXRemainder = $width - $croppedCenterX;
if ($xRemainder < $croppedXRemainder) {
$focusOffsetX -= $croppedXRemainder - $xRemainder;
}
if ($focusOffsetX < 0) {
$focusOffsetX = 0;
}
//Set horizontal crop start point
$left = $focusOffsetX;
//Generate image
return $backend->resizeByHeight($height)->crop($top, $left, $width, $height);
} else {
if ($widthRatio < $heightRatio) {
//Top and/or bottom of image will be lost
//Container center in px
$croppedCenterY = floor($height / 2);
//Focus point of resize image in px
$focusFactorY = ($this->owner->FocusY + 1) / 2;
// zero is bottom of image, 1 is top
$scaledImageHeight = floor($originalHeight / $widthRatio);
$focusY = $scaledImageHeight - floor($focusFactorY * $scaledImageHeight);
//Calculate difference beetween focus point and center
$focusOffsetY = $focusY - $croppedCenterY;
//Reduce offset if necessary so image remains filled
$yRemainder = $scaledImageHeight - $focusY;
$croppedYRemainder = $height - $croppedCenterY;
if ($yRemainder < $croppedYRemainder) {
$focusOffsetY -= $croppedYRemainder - $yRemainder;
}
if ($focusOffsetY < 0) {
$focusOffsetY = 0;
}
//Set vertical crop start point
$top = $focusOffsetY;
//Generate image
return $backend->resizeByWidth($width)->crop($top, $left, $width, $height);
} else {
//Generate image without cropping
return $backend->resize($width, $height);
}
}
}
}
