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CSS image-rendering Control Image Scaling Algorithms
Introduction
The image-rendering
CSS property determines how images are scaled. It’s crucial for maintaining image quality when they are resized due to page design or user interactions like zooming. This property is especially useful for managing the visual integrity of images that are either upscaled or downscaled.
Definition and Syntax
The image-rendering
property controls the algorithm used for scaling images. It applies to the element itself, any images set in its other properties, and its descendants.
Syntax:
Keyword Values:
auto
: The browser chooses the best scaling algorithm.crisp-edges
: Uses an algorithm that preserves contrast and edges, suitable for pixel art or line drawings.pixelated
: Preserves a “pixelated” look without introducing scaling artifacts.
Global Values:
inherit
: Inherits the value from the parent element.initial
: Sets the property to its default value.unset
: Resets the property to its natural value.revert
: Reverts the property to the value set by the user-agent stylesheet.revert-layer
: Reverts the property to the value set by the user-agent stylesheet for the parent layer.
Examples
Example 1: Comparing auto
and crisp-edges
HTML:
Output:
- The
auto
value uses the browser’s default scaling algorithm. - The
crisp-edges
value preserves contrast and edges, making the image sharper.
Example 2: Using pixelated
HTML:
Output:
- The
auto
value uses the browser’s default scaling algorithm. - The
pixelated
value preserves a “pixelated” look without introducing scaling artifacts.
Example 3: Using initial
HTML:
Output:
- The
crisp-edges
value preserves contrast and edges. - The
initial
value resets the property to its default value as defined by the browser.
Specifications
The image-rendering
CSS property is defined in the CSS Images Module Level 3 specification. This specification ensures consistency across different browsers and platforms.
Specification Details:
- Specification Name: CSS Images Module Level 3
- Section:
image-rendering
- Link: CSS Images Module Level 3 - image-rendering
Browser Compatibility
The image-rendering
property is widely supported across modern browsers:
- Chrome: Supported since version 13.
- Edge: Supported since version 79.
- Firefox: Supported since version 3.6.
- Safari: Supported since version 6.
- Opera: Supported since version 15.
See Also
For further reading and related CSS properties, you may find the following resources helpful:
object-fit
: Specifies how the content of a replaced element should be resized to fit its container.object-position
: Specifies the alignment of the content of a replaced element inside its box.image-orientation
: Specifies the orientation of an image.image-resolution
: Specifies the intrinsic resolution of a raster image.- CSS images module: Provides an overview of CSS properties related to images and their manipulation.
- SVG
image-rendering
attribute: Similar to the CSSimage-rendering
property, used to control the rendering of images within SVG elements.
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