@netlify/content-engine
Version:
69 lines • 2.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.validateAndNormalizeFormats = validateAndNormalizeFormats;
exports.calculateImageDimensions = calculateImageDimensions;
function validateAndNormalizeFormats(formats, sourceFormat) {
const formatSet = new Set(formats);
// convert auto in format of source image
if (formatSet.has(`auto`)) {
formatSet.delete(`auto`);
formatSet.add(sourceFormat);
}
if (formatSet.has(`jpg`) && formatSet.has(`png`)) {
throw new Error(`Cannot specify both JPG and PNG formats`);
}
return formatSet;
}
/**
* Generate correct width and height like sharp will do
* @see https://sharp.pixelplumbing.com/api-resize#resize
*/
function calculateImageDimensions(originalDimensions, { fit, width: requestedWidth, height: requestedHeight, aspectRatio: requestedAspectRatio, }) {
// Calculate the eventual width/height of the image.
let imageAspectRatio;
if (requestedAspectRatio) {
imageAspectRatio = requestedAspectRatio;
}
else {
imageAspectRatio = originalDimensions.width / originalDimensions.height;
}
let width = requestedWidth;
let height = requestedHeight;
switch (fit) {
case `inside`: {
const widthOption = requestedWidth ?? Number.MAX_SAFE_INTEGER;
const heightOption = requestedHeight ?? Number.MAX_SAFE_INTEGER;
width = Math.min(widthOption, Math.round(heightOption * imageAspectRatio));
height = Math.min(heightOption, Math.round(widthOption / imageAspectRatio));
break;
}
case `outside`: {
const widthOption = requestedWidth ?? 0;
const heightOption = requestedHeight ?? 0;
width = Math.max(widthOption, Math.round(heightOption * imageAspectRatio));
height = Math.max(heightOption, Math.round(widthOption / imageAspectRatio));
break;
}
case `fill`: {
width = requestedWidth ?? originalDimensions.width;
height = requestedHeight ?? originalDimensions.height;
break;
}
default: {
if (requestedWidth && !requestedHeight) {
width = requestedWidth;
height = Math.round(requestedWidth / imageAspectRatio);
}
if (requestedHeight && !requestedWidth) {
width = Math.round(requestedHeight * imageAspectRatio);
height = requestedHeight;
}
}
}
return {
width: width,
height: height,
aspectRatio: width / height,
};
}
//# sourceMappingURL=utils.js.map