Should merge fixes from pull requests and issues from gliffy

[Validark]

Looks like a lot of folks have found many issues with canvas2svg and some fixes are already available. It would be great if svgcanvas could address these issues. Here is a checklist of issues/pull requests that could be fixed into this project.

• Handling Decimal RGB values gliffy/canvas2svg#85
  • Closed by Update Regular Expression to handle decimal values #10
• Fixed image transform issue. gliffy/canvas2svg#84
  • x and y of drawImage missing in getSerializedSvg? gliffy/canvas2svg#69
• support for putImageData needed gliffy/canvas2svg#81
• Font parsing fails on "normal 12px 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif" gliffy/canvas2svg#74 + Font parsing fails on eg 12px/12px gliffy/canvas2svg#68 + can't parse bold fonts gliffy/canvas2svg#45
  • Closed by Use browser's built-in font parser #11
• shadowColor method missing gliffy/canvas2svg#72
• Allows embedding of images as Data URLs gliffy/canvas2svg#71
  • Option to embed external xlink:href URLs as base64 encoded gliffy/canvas2svg#56
• clearRect is drawing white instead of clearing to transparent gliffy/canvas2svg#70
• Fixes & optimizations gliffy/canvas2svg#66
  • "Greatly reduces garbage during exports, improving export time."
  • "Fixes error thrown with font_names with underscores"
  • "Fixes error when HTMLCanvasElement pattern is sent to C2S instance"
• Calling ctx.save does not always entail writing to a new group element gliffy/canvas2svg#64
• image opacity + fix gliffy/canvas2svg#63
• Set image 'opacity' attribute in drawImage method gliffy/canvas2svg#53
• ctx.fill("evenodd") doesn't work + fix gliffy/canvas2svg#62
• ctx.createPattern(img, 'repeat'); doesn't work gliffy/canvas2svg#61
• infinite loop with patterns on ctx.fill(); gliffy/canvas2svg#60 + Endless loop when copying over defs gliffy/canvas2svg#49
• canvas2svg.js:577 Attempted to apply path command to node text gliffy/canvas2svg#52
  • Maybe a nicer error message would help?
• Feature request: Add support for respecting the ctx.imageSmoothingEnabled property in ctx.drawImage gliffy/canvas2svg#50
• Transformed Text coming Plain gliffy/canvas2svg#47
• Transformation order gliffy/canvas2svg#44
• Exporting text as paths gliffy/canvas2svg#40
  • Perhaps https://github.com/shrhdk/text-to-svg could be leveraged?
• Added ellipse command gliffy/canvas2svg#36
• What about using clipPath for ctx.clearRect? gliffy/canvas2svg#19
• TypeError: value.indexOf is not a function when using a gradient for strokeStyle gliffy/canvas2svg#13
• getImageData() Support? gliffy/canvas2svg#3

[Validark]

@zenozeng Please look over this checklist and tick the box of any of these which you know are already fixed!

[zenozeng]

• Transformation order gliffy/canvas2svg#44 is fixed by Implement CanvasTransform Interface gliffy/canvas2svg#83

[jez9999]

@zenozeng Could you merge that fix into svgcanvas? Obviously it looks like canvas2svg is no longer maintained, so we need a decent fork that is maintained.

[throwandgo]

@jez9999 It seems like it already has been merged; it's just split into smaller commits, e.g. e1b6785.