2014/10/16 上午 12:02:19

jquery Programming Glossary: canvas.height

How to make the text write in counterclockwise direction

http://stackoverflow.com/questions/12312752/how-to-make-the-text-write-in-counterclockwise-direction

context.lineWidth 4 var centerX canvas.width 2 var centerY canvas.height 30 var angle Math.PI 0.8 radians var radius 150 drawTextAlongArc..

IOS6 and Safari Photo Uploading - File API + Canvas + jQuery Ajax Uploading and Resizing Files Asynchronously

http://stackoverflow.com/questions/12539862/ios6-and-safari-photo-uploading-file-api-canvas-jquery-ajax-uploading-and

document.createElement 'canvas' canvas.width imageWidth canvas.height imageHeight var ctx canvas.getContext 2d ctx.drawImage this..

Unable to get image data from canvas because the canvas has been tainted by cross-origin data

http://stackoverflow.com/questions/14438377/unable-to-get-image-data-from-canvas-because-the-canvas-has-been-tainted-by-cros

document.createElement canvas canvas.width image.width canvas.height image.height Draw the image in canvas var ctx canvas.getContext.. pixel data var imageData ctx.getImageData 0 0 canvas.width canvas.height Loop through imageData.data an array with 4 values per pixel..

Javascript / jQuery - How to convert Media and Image data into binary text format

http://stackoverflow.com/questions/14726729/javascript-jquery-how-to-convert-media-and-image-data-into-binary-text-forma

document.createElement canvas canvas.width img.width canvas.height img.height Copy the image contents to the canvas var ctx canvas.getContext..

html2canvas error: Uncaught Error: IndexSizeError: DOM Exception 1

http://stackoverflow.com/questions/15328764/html2canvas-error-uncaught-error-indexsizeerror-dom-exception-1

case the canvas . console.log canvas.width console.log canvas.height console.log bounds.left console.log bounds.top ecc.... share..

How to drag images / objects within Canvas?

http://stackoverflow.com/questions/18333936/how-to-drag-images-objects-within-canvas

0.5 context.clearRect 0 0 canvas.width canvas.height context.restore context.save context.drawSvg files 0 0 0 400.. tiger.png function draw ctx.clearRect 0 0 canvas.width canvas.height draw tiger ctx.globalAlpha 0.25 ctx.drawImage tiger panX panY..

JavaScript eyedropper (tell color of Pixel under mouse cursor)

http://stackoverflow.com/questions/1936021/javascript-eyedropper-tell-color-of-pixel-under-mouse-cursor

canvas canvas.width yourImageElement.width canvas.height yourImageElement.height canvas.getContext '2d' .drawImage yourImageElement..

How to draw number lines using HTML

http://stackoverflow.com/questions/4182494/how-to-draw-number-lines-using-html

ctx canvas.getContext '2d' var w canvas.width 700 var h canvas.height 400 with ctx fillStyle '#000' fillRect 0 0 w h fill beginPath..

HTML5 Canvas 100% Width Height of Viewport?

http://stackoverflow.com/questions/4288253/html5-canvas-100-width-height-of-viewport

function resizeCanvas canvas.width window.innerWidth canvas.height window.innerHeight Your drawings need to be inside this function..

Convert an image into binary data in javascript [duplicate]

http://stackoverflow.com/questions/5420384/convert-an-image-into-binary-data-in-javascript

document.createElement canvas canvas.width img.width canvas.height img.height Copy the image contents to the canvas var ctx canvas.getContext..

Compile/Save/Export HTML as a PNG Image using Jquery

http://stackoverflow.com/questions/5941631/compile-save-export-html-as-a-png-image-using-jquery

0 left 0 width root.scrollWidth height root.scrollHeight canvas.height selection.height canvas.width selection.width context.drawWindow.. image .load function jquery way canvas.width image.width canvas.height image.height ctx.drawImage image 0 0 Your plugin probably uses..

HTML5 Panning based on Mouse Movement

http://stackoverflow.com/questions/7096921/html5-panning-based-on-mouse-movement

var x e.offsetX var y e.offsetY var cx canvas.width var cy canvas.height if x 0.1 cx y 0.1 cy alert Upper Left Move viewport to up..

How to change color of an image using jquery [closed]

http://stackoverflow.com/questions/9303757/how-to-change-color-of-an-image-using-jquery

null function getPixels img canvas.width img.width canvas.height img.height ctx.drawImage img 0 0 img.naturalWidth img.naturalHeight..

How to make the text write in counterclockwise direction

http://stackoverflow.com/questions/12312752/how-to-make-the-text-write-in-counterclockwise-direction

center context.fillStyle blue context.strokeStyle blue context.lineWidth 4 var centerX canvas.width 2 var centerY canvas.height 30 var angle Math.PI 0.8 radians var radius 150 drawTextAlongArc context Text along arc path centerX centerY radius angle..

IOS6 and Safari Photo Uploading - File API + Canvas + jQuery Ajax Uploading and Resizing Files Asynchronously

http://stackoverflow.com/questions/12539862/ios6-and-safari-photo-uploading-file-api-canvas-jquery-ajax-uploading-and

maxHeight Create canvas with new image var canvas document.createElement 'canvas' canvas.width imageWidth canvas.height imageHeight var ctx canvas.getContext 2d ctx.drawImage this 0 0 imageWidth imageHeight The resized file ready for upload..

Unable to get image data from canvas because the canvas has been tainted by cross-origin data

http://stackoverflow.com/questions/14438377/unable-to-get-image-data-from-canvas-because-the-canvas-has-been-tainted-by-cros

var colors var image new Image image.onload function var canvas document.createElement canvas canvas.width image.width canvas.height image.height Draw the image in canvas var ctx canvas.getContext 2d ctx.drawImage image 0 0 Get the pixel data var imageData.. ctx canvas.getContext 2d ctx.drawImage image 0 0 Get the pixel data var imageData ctx.getImageData 0 0 canvas.width canvas.height Loop through imageData.data an array with 4 values per pixel red green blue and alpha for var x 0 x imageData.width x for..

Javascript / jQuery - How to convert Media and Image data into binary text format

http://stackoverflow.com/questions/14726729/javascript-jquery-how-to-convert-media-and-image-data-into-binary-text-forma

getBase64Image img Create an empty canvas element var canvas document.createElement canvas canvas.width img.width canvas.height img.height Copy the image contents to the canvas var ctx canvas.getContext 2d ctx.drawImage img 0 0 Get the data URL formatted..

html2canvas error: Uncaught Error: IndexSizeError: DOM Exception 1

http://stackoverflow.com/questions/15328764/html2canvas-error-uncaught-error-indexsizeerror-dom-exception-1

How to drag images / objects within Canvas?

http://stackoverflow.com/questions/18333936/how-to-drag-images-objects-within-canvas

context.save context.setTransform 1 0 0 1 0 0 context.globalAlpha 0.5 context.clearRect 0 0 canvas.width canvas.height context.restore context.save context.drawSvg files 0 0 0 400 scaleValue 400 scaleValue context.scale scaleValue scaleValue.. https dl.dropboxusercontent.com u 139992952 stackoverflow tiger.png function draw ctx.clearRect 0 0 canvas.width canvas.height draw tiger ctx.globalAlpha 0.25 ctx.drawImage tiger panX panY tiger.width tiger.height draw color images ctx.globalAlpha..

JavaScript eyedropper (tell color of Pixel under mouse cursor)

http://stackoverflow.com/questions/1936021/javascript-eyedropper-tell-color-of-pixel-under-mouse-cursor

would have to draw them to a canvas with var canvas document.createElement canvas canvas.width yourImageElement.width canvas.height yourImageElement.height canvas.getContext '2d' .drawImage yourImageElement 0 0 And then just use the previous method explained..

How to draw number lines using HTML

http://stackoverflow.com/questions/4182494/how-to-draw-number-lines-using-html

Using Canvas Element function var canvas 'canvas' 0 var ctx canvas.getContext '2d' var w canvas.width 700 var h canvas.height 400 with ctx fillStyle '#000' fillRect 0 0 w h fill beginPath lineWidth 2 strokeStyle '#f00' moveTo w 7 h 2 lineTo 6 w 7..

HTML5 Canvas 100% Width Height of Viewport?

http://stackoverflow.com/questions/4288253/html5-canvas-100-width-height-of-viewport

dynamically window.addEventListener 'resize' resizeCanvas false function resizeCanvas canvas.width window.innerWidth canvas.height window.innerHeight Your drawings need to be inside this function otherwise they will be reset when you resize the browser..

Convert an image into binary data in javascript [duplicate]

http://stackoverflow.com/questions/5420384/convert-an-image-into-binary-data-in-javascript

Compile/Save/Export HTML as a PNG Image using Jquery

http://stackoverflow.com/questions/5941631/compile-save-export-html-as-a-png-image-using-jquery

canvas' var context canvas.getContext '2d' var selection top 0 left 0 width root.scrollWidth height root.scrollHeight canvas.height selection.height canvas.width selection.width context.drawWindow window selection.left selection.top selection.width selection.height.. Image image.src capture the image is not immediately usable image .load function jquery way canvas.width image.width canvas.height image.height ctx.drawImage image 0 0 Your plugin probably uses this method. You can also check its source code. Edit To..

HTML5 Panning based on Mouse Movement

http://stackoverflow.com/questions/7096921/html5-panning-based-on-mouse-movement

shown Current Edge Detection canvas.onmousemove function e var x e.offsetX var y e.offsetY var cx canvas.width var cy canvas.height if x 0.1 cx y 0.1 cy alert Upper Left Move viewport to up and left if possible Additional Checks for location I know I..

How to change color of an image using jquery [closed]

http://stackoverflow.com/questions/9303757/how-to-change-color-of-an-image-using-jquery

ctx canvas.getContext 2d var originalPixels null var currentPixels null function getPixels img canvas.width img.width canvas.height img.height ctx.drawImage img 0 0 img.naturalWidth img.naturalHeight 0 0 img.width img.height originalPixels ctx.getImageData..