[16 Jul 2018]
- new Drawception palette
[03 Jun 2018]
- new Drawception palette
[09 Apr 2018]
- touchscreen fixes for adding/removing palette color and other doubled clicking issues
[29 Mar 2018]
- touchscreen fixes
[20 Mar 2018]
- fix for Firefox 59+ without breaking Opera 12
- changed palette sharing to always give palette link
- doubled palette sharing image size; removed the need for double clicking
[03 Mar 2018]
- new Drawception palette
[01 May 2017]
- new Drawception palette
[23 Jan 2017]
- new Drawception palette
[23 Aug 2016]
- Fixed loading from URL in Firefox with referer enabled
- new Drawception palette
[10 Jul 2016]
- two new palettes by Arne: http://androidarts.com/palette/16pal.htm
- new Drawception palette
[20 Feb 2016]
- custom palette editing and sharing feature
- improved imgur sharing
[21 Dec 2015]
- added options in index.html, "C" now toggles cursor hiding
- autodetect wacom tablet plugin
[12 Dec 2015]
- apparently previous change broke Opera 12... fixing
[08 Dec 2015]
- added polyfill for the damn modern SVG2 pathSegList feature removal
[12 Sep 2015]
- try fix "straight line to corner" bug like http://grompe.org.ru/drawit/#kCGSRWO
[09 Sep 2015]
- fixed bug with replay causing fill to be applied forever
[29 Aug 2015]
- fixed resetting snap value to 0
- added palette "Freedom" as per request
[18 Aug 2015]
- fixed error when Shift+clicking on empty canvas
- added shortcuts for brush opacity:
  <T> halves primary color opacity, this can be repeated down to 1/16
  Shift+Alt+click - eyedropper with preserved current brush opacity
[31 Jan 2015]
- fixed wrong size of background when exporting a custom-sized PNG in some cases
[11 Jan 2015]
- added a hint which color is under the cursor


WHAT TO DO
==========

Features:

- remove first rect

- show loading indicator on import and export, requires async saving/loading

- when window is resized and canvas is empty, use window.devicePixelRatio to increase 600x500 canvas

- show touchscreen hint for undo/redo/zoom/scroll for the first time
  - or "help" button that shows where's what and keyboard shortcuts

- speed up binary saving/loading

- make rewind cache independent of current position, remember cache position instead

- visual feedback when pressing shortcut for colors


Standalone Features:

- separate code

- replace colors function

- allow saving and loading static SVG, animated SVG

- basic layers (3 of them), drawing in middle by default
  - greatly complicates playback process
  - instead, use history insertion (and modify undo accordingly)

- pixel art mode

- if recording time, record it in a way it relates only to each stroke: milliseconds from begin to end

- brush of size 1

- integrate multiplayer


Ideas:

- when colorpicking, show zoomed in preview near cursor?

- make knob's title "position/maxpos"

- save drawing backup in localstorage (might lag)

- when redrawing vector image onto smaller canvas,
  try to snap coordinates and stroke sizes to pixels

- export depth map for http://depthy.me/ ?!


Bugs:

- regression since eraser update:
  firefox 24 displaying thin outline when painting on transparent canvas

- mobile firefox closes menus instantly, without a chance to click

- buggy playback, saving and loading in android browser (is it worth to fix?)

- later firefox exports canvas as picture instead of picking color on alt+rightclick


Caveats:
- Firefox stutters if you begin drawing right after loading page;
  . waiting for a few seconds will prevent that
- Most functions don't work in IE 9.
  + I don't care!
- On Android Firefox drawing scrolls the page
  + Workaround: go to "about:config", change "browser.chrome.dynamictoolbar" to "false"
- there's a problem with setting background color globally:
  if artist starts drawing black on white and then switches to black background much later,
  in recording it won't be visible.
  + But it's easily watchable if background color is switched manually during the playback.
    Making this not such a big problem.
- Firefox 24 displays thin outline when painting on transparent canvas
  + Workaround: go to "about:config", change "gfx.canvas.azure.accelerated" to "false"

No longer relevant or unfixable:
- Opera makes canvas tainted when drawImage(svg) is used.
  + Workaround is to draw SVG elements manually
- Opera fails to update the whole drawing area when there is <canvas> before <div> with SVG.
  + Reordered and fixed.
- Opera eats keyboard events when SVG is clicked.
  + Setting svg style="position: absolute" and "pointer-events" to "none"  seems to fix that.
- Eraser is not compatible with SVG.
  + Dynamically changing color solves it.
- Canvg draws a border around the canvas when it shouldn't if its context had lineWidth previously set.
  + setting ctx.lineWidth = 0.001 solves it, but better to get rid of canvg.
- Tight bezier curves produce artifacts on Chrome & Firefox
  + changed smoothening algorithm
- Opera fails to display cross cursor on canvas after Alt key and no click.
  . no good way to solve it
- Opera cannot hide cursor
  . no way to solve it
- In non-Presto browser, SVG stroke redraws whole, and as such the longer
  the stroke is, the jaggier the input will be on slower computers.
  + Using canvas instead of SVG for showing strokes


Old
===
[Early version]
- (done) make svg to canvas rendering
- (done) decode end of png to insert chunk
- (done) store sequence of curves in that chunk
- (done) playback that
- (done) keyboard shortcuts
- (done) fix "undoing" background rectangle
- (done) first try overlay svg drawing, if doesn't help, then flatten svg to canvas for performance
- (done) use draw history for undo
- (done) icons
- (done) make replay work on |> || buttons
- (done) make seek bar respond to touch events
- (done) palette chooser
- (done) cut everything before last filled rectangle when exporting
- (done) when exporting and position is < max, ask if user wants to discard everything after current position
- (done) fix negative stroke-width of first stroke when loading in binary format
- (done) fix palette chooser columns in Opera 12.x (spanning over 2 columns)
- (done) merge and refactor knob mouse/touch events
- (done) fix pause button not changing to play when playback is paused by clicking on seekbar
- (done) load background color when loading an image
- (done) shaped drawing cursor
- (done) eyedropper
- (done) make cursor hide when Alt is pressed
- (done) fixed bug: setting background visually erases last stroke
- (done) small fix: eraser not displaying "eraser"
- (done) pause replay when attempting to draw and ignore first stroke
- (done) implemented crc32 calculation, renamed chunk to svGa;
         makes Android devices happy displaying saved PNG images
[25 Jul]
- (done) produce downloadable png on export for blob-supporting browsers
- (done) smooth knob transition CSS (but turned off when setting position to 0)
- (done) display eyedropper cursor
- (done) fixed eyedropper picking the eraser
- (done) get rid of canvg
- (done) place brush cursor on top
- (done) hide brush cursor when outside of container
[27 Jul]
- (done) fix eyedropper cursor being stuck after Alt+Tab
- (done) smoothen lines with bezier curves
- (done) fixed firefox 24 displaying thin outline when painting on transparent canvas
- (done) show "loading" picture in background until JS is loaded
- (done) space key for play/stop
- (done) make undo/rewind cache up to 10 steps before current position
- (done) fix blots not being loaded from binary file in Chrome (pathSegList doesn't have length but numberOfItems)
- (done) show error
- (done) tablet support for eraser
- (done) fix import requiring double clicking on Chrome
- (done) saving as file code style fix
[28 Jul]
- (done) replaced svg 1.2 tiny with svg 1.1
- (done) removed duplicate DrawSVGElement function
- (done) better strokes: reduce excessive number of points, better smoothing
- (done) revise binary format, add compression and switch to it
- (done) change to persistent link
- (done) register imgur app
- (done) fixed blot not having orig points bug
- (done) upload to imgur
- (done) download from imgur via hash change
- (done) request imgur image via https to prevent recompression
[02 Aug]
- (done) fix unerasable lines on touch screen
- (done) touch screen: two finger undo and redo, like back and forward in Opera gestures
- (done) make smooth replay (mid-stroke)
[03 Aug]
- (done) make smoother seekbar too
[08 Aug]
- (experimental) patterns as per http://drawception.com/forums/suggestions/19057/manga-theme/
- (done) fixed right + left click making permanent visual bug
[09 Aug]
- (done) rewrote line smoothening algorithm
         fixes: in Chrome and Firefox some highly bent bezier curves leave non-round corners
[10 Aug]
- (done) fix focus change making wacom plugin reload
- (done) fix inconsistent seekbar position
- (done) fix changing background color redrawing the whole image from beginning
         till end, even if current position is beginning (empty canvas)
[20 Aug]
- (done) small fixes for imgur uploading
[21 Aug]
- (done) when uploading to imgur, change URL in address bar for easy sharing
- (done) confirm when leaving an unfinished drawing
[22 Aug]
- (done) fix right-clicking the knob causing error
- (done) internal: simplify dynamic palette adding
- (done) internal: playback delay is now a variable
- (done) added March palette
- (done) added a favicon
[23 Aug]
- (done) menu
- (done) allow saving custom resolution PNG
- (done) random caption generator!
- (done) fixed width on mobile view
[24 Aug]
- (done) fixed menu on Firefox
- (done) merged experimental patterns, adjusted one and added two
- (done) usage tips in menu
- (done) fix eraser strokes not saving correctly
- (done) eraser now works by changing globalCompositeOperation
- (done) setting background works faster
- (done) set transparent background in menu
[27 Aug]
- (done) fixed fill not saving correctly
[29 Aug]
- (done) erase button resets the timer (sandbox mode only)
[08 Sep]
- (done) revise saving and loading, normalize array/string/arraybuffer/dataview access
- (done) new format version (4), fixes UTF-8 strings in the playback data,
         now 8% more compact and faster
[11 Sep]
- (experimental) line drawing with Shift key (to be in standalone app only)
[13 Sep]
- (done) fix disappearing dots when drawing while zoomed in
- (done) drawing with Shift key now appends the line to the previous one
[17 Sep]
- (done) small fixes for touch input
- (experimental) export drawing process as WebM
[26 Sep]
- (done) prevent context menu when drawing with right mouse button
[29 Sep]
- (done) fix play button not switching its state properly
[19 Oct]
- (done) replace in-progress stroke drawing SVG with canvas in non-Presto browsers,
         improves performance and fixes pattern display
[27 Oct]
- (done) added <,> and <.> keys and Ctrl+1,2,3,4 for changing brush size
- (done) clicking "Set background" or <B> also cancels choosing a background
[29 Oct]
- (done) added ability to change brush size while drawing
- (done) in play mode, eyedropper picks nearest palette color
- (experimental) menu item to display color transitions
[15 Nov]
- (done) prevent accidentally selecting the canvas and other elements
[23 Nov]
- (done) change menu symbol to three lines to be look obvious these days
[10 Dec]
- (done) fixed background being always transparent when exporting with custom size
- (experimental) added option to set an image as background (to draw over)
- (experimental) added option to disable stroke smoothening
- (experimental) added option to snap to grid (6 is fun for quasi-pixelart)