html5-canvas

问题 I have a function which downloads an image, and saves the image data. Based on user preference, it can save the image data in one of two ways - as an ImageData Uint8ClampedArray, or as an ImageBitmap. I'm using an image loading function to wait until the image is loaded before running my save function: function loadImage(src) { return new Promise((resolve, reject) => { const img = new Image(); img.crossOrigin = '*'; img.addEventListener('load', () => resolve(img)); img.src = src; }); } The

问题 My Goal is to rescale the image automatically to 12 x 12 whenever someone select the file from desktop. Eg: - If user select 1000 x 500 image i want it to automatically rescale to 12 x 12 HTML: <input type="file" name="files[]" class="myimage" /> (Using Javascript) 回答1: If you want the image to have a certain dimensions such as 12x12 as soon as it loads, you will need to add a class to the image by listening to the 'load' event of the image. Like this: The class will be applied as soon as the

问题 The code below should convert html to pdf using html2canvas library and then download it, but it's showing this error: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported The issue is still present after allowing cross-origin on the S3 bucket. html2canvas(document.getElementById('compare'), { scale: window.devicePixelRatio, logging: true, allowTaint:true, onrendered: function (canvas) { var data = canvas.toDataURL(); var docDefinition = { content: [{

来源： https://stackoverflow.com/questions/63724631/bootstrap-popovers-spacing

来源： https://stackoverflow.com/questions/63724631/bootstrap-popovers-spacing

来源： https://stackoverflow.com/questions/56398519/how-to-make-a-repeating-canvasgradient

来源： https://stackoverflow.com/questions/56398519/how-to-make-a-repeating-canvasgradient

来源： https://stackoverflow.com/questions/56398519/how-to-make-a-repeating-canvasgradient

来源： https://stackoverflow.com/questions/56398519/how-to-make-a-repeating-canvasgradient

来源： https://stackoverflow.com/questions/64314986/how-to-update-the-hit-area-of-text-after-change-the-alignment-in-easeljs