// Image Mixins
// - Responsive image
// - Retina image

// Responsive image
//
// Keep images from scaling beyond the width of their parents.

@mixin img-fluid() {
    // Part 1: Set a maximum relative to the parent
    max-width: 100%;
    // Part 2: Override the height to auto, otherwise images will be stretched
    // when setting a width and height attribute on the img element.
    height: auto;
}

// Retina image
//
// Short retina mixin for setting background-image and -size.

@mixin img-retina($file-1x, $file-2x, $width-1x, $height-1x) {
    background-image: url($file-1x);
    // Autoprefixer takes care of adding -webkit-min-device-pixel-ratio and -o-min-device-pixel-ratio,
    // but doesn't convert dppx=>dpi.
    // There's no such thing as unprefixed min-device-pixel-ratio since it's nonstandard.
    // Compatibility info: https://caniuse.com/#feat=css-media-resolution
    @media only screen and (min-resolution: 192dpi), // IE9-11 don't support dppx
    only screen and (min-resolution: 2dppx) { // Standardized
        background-image: url($file-2x);
        background-size: $width-1x $height-1x;
    }

    @include deprecate("`img-retina()`", "v4.3.0", "v5");
}