Method saveImage

processing/processing.go:498–532

(
	ctx context.Context,
	img *vips.Image,
	po ProcessingOptions,
)

}

func (p *Processor) saveImage(
	ctx context.Context,
	img *vips.Image,
	po ProcessingOptions,
) (imagedata.ImageData, error) {
	outFormat := po.Format()

	// AVIF has a minimal dimension of 16 pixels.
	// If one of the dimensions is less, we need to switch to another format.
	if outFormat == imagetype.AVIF && (img.Width() < 16 || img.Height() < 16) {
		if img.HasAlpha() {
			outFormat = imagetype.PNG
		} else {
			outFormat = imagetype.JPEG
		}

		po.SetFormat(outFormat)

		slog.Warn(fmt.Sprintf(
			"Minimal dimension of AVIF is 16, current image size is %dx%d. Image will be saved as %s",
			img.Width(), img.Height(), outFormat,
		))
	}

	quality := po.Quality(outFormat)

	// If we want and can fit the image into the specified number of bytes,
	// let's do it.
	if maxBytes := po.MaxBytes(); maxBytes > 0 && outFormat.SupportsQuality() {
		return saveImageToFitBytes(ctx, img, outFormat, quality, maxBytes, po.Options)
	}

	// Otherwise, just save the image with the specified quality.
	return img.Save(outFormat, quality, po.Options)
}