HTML5 Canvas for Internet Explorer via Flash

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ChangeLog of FlashCanvas Pro

Version 1.6 (Dec. 11, 2013)


  • Implemented some FlashCanvas-specific methods for CanvasRenderingContext2D interface.
    • loadImage() method
    • loadFont() method
  • Supported canvas.onload event handler.
  • Supported a few new options.
    • "proxy" option
    • "save" option
    • "autoinit" option
  • canvas2png() and saveImage() can now take filename as the second argument.

(Bug fixes)

  • There was a possibility that FlashCanvas did not work well when several Internet Explorer windows existed on the screen.
  • The proxy script was accidentally used even when images were on the same domain as the SWF file, if used with absolute URL.
  • FlashCanvas froze if the fillStyle was set to null.
  • Complicated thick lines were sometimes rendered incorrectly.
  • measureText() threw an exception when the argument was numerical.
  • Loading of images failed if redirected to other domain.
  • The proxy script should check that the request comes from the same host.

Version 1.5 (Feb. 1, 2011)


  • Improvements to drawImage() and createPattern().
    • Further optimization.
    • Implement error handling.
    • Accept any object that has a src property.
  • Supported a few new options.
    • "swfPath" option
    • "imageCacheSize" option
    • "usePolicyFile" option
  • Supported asynchronous loading of flashcanvas.js.
  • Made it possible to set the options via a window.FlashCanvasOptions object.
  • Throw an exception if the given arguments are invalid.

(Bug fixes)

  • The combination of clip() and globalCompositeOperation was not supported.
  • Shapes with shadow were displayed in the wrong position when clipped.
  • arcTo() occasionally drew a straight line of infinite length by error.
  • arc() didn't add the start point to the subpath when the startAngle and the endAngle were the same.
  • restore() didn't restore the clipping region correctly.
  • clearRect() should not clear the pixels outside the clipping region.
  • Special characters in a url need to be escaped when passed to Flash.
  • toDataURL("image/jpeg") must composite the image to a black background.
  • Many minor bug fixes thanks to the canvas test suite developed by Philip Taylor.

Version 1.4 (Nov. 15, 2010)


  • Added new features to drawImage() and createPattern().
    • Made it possible to take an HTMLCanvasElement as an argument.
    • Made it possible to load image files from other domain.
  • Prepared FlashCanvas.saveImage() method.
  • textAlign gets to support the directionality of "rtl".
  • Refactored the handling of resize event.
  • Some performance improvements.

(Bug fixes)

  • Canvas was rendered incorrectly when printed.
    • Canvas was expanded if the page was in quirks mode.
    • The background was painted gray.
  • Tweaked the color parser to check the input more strictly.
  • Shadows were not rendered according to the drawing model.


  • Included canvas2png.js script that can be used to save a canvas image.
  • Included more benchmark programs and test cases.
  • Made the examples compatible with IE9.

Version 1.3 (Sep. 4, 2010)


  • Supported data URI scheme in drawImage() and createPattern().
  • Supported repetitions of "repeat-x", "repeat-y" and "no-repeat" in createPattern().
  • Made it possible to call initElement() before appendChild().
  • Switched to use JavaScript implementation of measureText().

(Bug fixes)

  • Line styles were not set when the strokeStyle attribute was a CanvasGradient or CanvasPattern object.
  • Patterns were painted ignoring the globalAlpha attribute.
  • Patterns assigned to the strokeStyle attribute were not transformed.
  • The transformation matrix mistakenly affected the shadowOffsetX and shadowOffsetY attributes.
  • arc() didn't add the end point to the subpath when the central angle was greater than 2 pi.
  • closePath() must do nothing if the context has no subpaths.
  • IE8 didn't preload the swf file when the URL was a relative one.
  • Resize event canceled createLinearGradient().
  • The disableContextMenu option disabled mouse clicks on the outside of the canvas element.
  • Many minor bug fixes.

Version 1.2.1 (Jun. 14, 2010)

  • Supported Flash Player 10.1.
  • Included one more Canvas game.

Version 1.2 (Apr. 23, 2010)

  • Added a code which emulates ExplorerCanvas library.
  • Implemented asynchronous data transfer via FlashVars.
  • Made it possible to use FlashCanvas library installed in other domain.
  • Optimized drawImage().
  • Optimized fillText() and strokeText().
  • Implemented setOptions() method to configure FlashCanvas.
    • "disableContextMenu" option
    • "turbo" option
    • "delay" option
  • Fixed a bug that fillText(), strokeText(), measureText() caused an error when the first argument was number.
  • Fixed a bug that swf.resize() method could be called before ExternalInterface was ready for use.
  • Switched to using onunload event instead of onbeforeunload event.
  • Included several additional Canvas demos.

Version 1.1 (Feb. 28, 2010)

  • Various bug fixes in drawImage().
    • draw-image-flip.html, an example from ExplorerCanvas project, is now rendered correctly.
    • Images are rendered in the right order.
  • Optimized stroke().
    • 5_2_canvas_translate.html and 5_4_canvas_scale.html, examples from Mozilla Developer Center, are now rendered in a moment.
  • Optimized fillText() and strokeText().
  • Optimized drawImage().
    • example3.html and resizing.html, examples from ExplorerCanvas project, are now rendered smoothly.
  • Reduced CPU time consumption.
  • Added JPEG support to toDataURL().
  • Implemented "Save Image As..." in the right-click context menu.
  • Implemented event bubbling for click and dblclick events.
  • Removed ambiguity from the license.

Version 1.0 (Feb. 7, 2010)

  • Initial release