Developer:Canvas

Implementation Notes

TODO

• globalCompositeOperation = lighter and copy don't have a direct equivalent in Swing Graphics. Needs custom implementation. Java implementation is different from the HTMLcanvas implementation.
• Following APIs are yet to be implemented:

  • Config APIs

    • font
    • textAlign
    • textBaseline
    • measureText
    • createRadialGradient
    • createPattern
    • shadowOffsetX
    • shadowOffsetY
    • shadowBlur
    • shadowColor

  • Draw APIs

    • drawFocusIfNeeded
    • strokeText
    • drawImage

  • Interaction and Animation

    • isPointInPath
    • addHitRegion
    • removeHitRegion
    • clearHitRegion

Tests

Apart from the w3c tests, here are some more:

• Philip's canvas tests

Security considerations

• Reading from a canvas could be a special permission, since it apparently enables fingerprinting. (Needs study).