return array('x' => $sourceX, 'y' => $sourceY, 'w' => $sourceWidth, 'h' => $sourceHeight);
}
+
+ function getRegionDimensionsAsFloat($sourceDimensions, $regionDimensions) {
+ // Return region dimensions as { 'x' => xOffset, 'y' => yOffset, 'w' => width, 'h' => height }
+ // in terms of full resolution image.
+ // Note: this will clip the returned dimensions to fit within the source image
+
+ $sourceX = 0;
+ if (array_key_exists('x', $regionDimensions)) {
+ $sourceX = floatAmount($regionDimensions['x'], $sourceDimensions['width']);
+ }
+ $sourceX = $this->clamp(0.0, 1.0, $sourceX);
+
+ $sourceY = 0;
+ if (array_key_exists('y', $regionDimensions)) {
+ $sourceY = floatAmount($regionDimensions['y'], $sourceDimensions['height']);
+ }
+ $sourceY = $this->clamp(0.0, 1.0, $sourceY); // Allow at least one pixel
+
+ $sourceWidth = $sourceDimensions['width'] - $sourceX;
+ if (array_key_exists('w', $regionDimensions)) {
+ $sourceWidth = floatAmount($regionDimensions['w'], $sourceDimensions['width']);
+ }
+ $sourceWidth = $this->clamp(0.0, 1.0, $sourceWidth);
+
+ $sourceHeight = $sourceDimensions['height'] - $sourceY;
+ if (array_key_exists('h', $regionDimensions)) {
+ $sourceHeight = floatAmount($regionDimensions['h'], $sourceDimensions['height']);
+ }
+ $sourceHeight = $this->clamp(0.0, 1.0, $sourceHeight);
+
+ return array('x' => $sourceX, 'y' => $sourceY, 'w' => $sourceWidth, 'h' => $sourceHeight);
+ }
function intAmount($stringValue, $maximum) {
// Returns integer amount for string like "5" (5 units) or "0.5" (50%)
return floatval($stringValue) * $maximum + 0.5;
}
+ function floatAmount($stringValue, $maximum) {
+ // Returns float amount (0.0 to 1.0) for string like "0.4" (40%) or "4" (40% if max is 10)
+ if (strpos($stringValue, ".") === false) {
+ // No decimal, assume int value out of maximum
+ return floatval($stringValue) / $maximum;
+ }
+
+ // Given float - just pass through
+ return floatval($stringValue);
+ }
+
function clamp($minValue, $maxValue, $observedValue) {
if ($observedValue < $minValue) {
return $minValue;