diff options
Diffstat (limited to 'testing/web-platform/tests/resize-observer/create-pattern-data-url.js')
-rw-r--r-- | testing/web-platform/tests/resize-observer/create-pattern-data-url.js | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resize-observer/create-pattern-data-url.js b/testing/web-platform/tests/resize-observer/create-pattern-data-url.js new file mode 100644 index 0000000000..d3634dc424 --- /dev/null +++ b/testing/web-platform/tests/resize-observer/create-pattern-data-url.js @@ -0,0 +1,22 @@ +const patternSize = 4; + +export default function createPatternDataURL() { + const ctx = document.createElement('canvas').getContext('2d'); + ctx.canvas.width = patternSize; + ctx.canvas.height = patternSize; + + const b = [0, 0, 0, 255]; + const t = [0, 0, 0, 0]; + const r = [255, 0, 0, 255]; + const g = [0, 255, 0, 255]; + + const imageData = new ImageData(patternSize, patternSize); + imageData.data.set([ + b, t, t, r, + t, b, g, t, + t, r, b, t, + g, t, t, b, + ].flat()); + ctx.putImageData(imageData, 0, 0); + return {patternSize, dataURL: ctx.canvas.toDataURL()}; +} |