How to Stretch Pixel Art Images in Browsers Without Antialiasing?

Achieving Pixelated Image Stretching in Browsers

Introduction

Stretching pixel art images without introducing antialiasing can enhance their clarity and preserve their retro aesthetics. However, achieving this result with smaller images can be challenging using traditional HTML, CSS, or JavaScript methods. This article explores solutions to achieve pixelated image stretching in-browser.

Antialiasing Challenges

When stretching images using conventional methods, antialiasing often occurs, blurring the edges and reducing the distinct appearance of pixel art. This effect can be observed in the fiddle below:

[Insert fiddle or embed given one]

CSS-Based Solution (Outdated)

Previously, a CSS-based solution was available using the image-rendering property. However, this method has become unreliable due to limited support in modern browsers.

Canvas-Based Solution

A robust solution involves utilizing the Canvas API. This approach involves copying each pixel of the source image, scaled by a specified factor, into a second canvas that is displayed on-screen. The code below demonstrates this technique:

[Insert provided code snippet]

Optimization

For improved performance, a modified version of the fiddle utilizes a raw image data array for the destination canvas:

[Insert improved fiddle]

Conclusion

Stretching pixel art images without antialiasing can be achieved with Canvas-based solutions. The provided code snippet can be adapted to different scaling factors and image sizes, enabling the creation of pixelated graphics with sharp edges in web applications. As browser support and CSS specifications evolve, additional options and optimizations may become available in the future.

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