- From: Arve Bersvendsen <arveb@opera.com>
- Date: Tue, 14 Nov 2006 14:53:36 +0100
On Tue, 14 Nov 2006 14:29:44 +0100, Stefan Haustein <sh at kobjects.org>
wrote:
> Arve Bersvendsen wrote:
>> drawElement() is hardly unpractical, bloated or overkill, since it's
>> actually probably the only way to get _somewhat_ predictable rendering
>> of text, pioneered by almost 10 years of CSS. drawString() reintroduces
>> the unpredictability of font and layout differences without attempting
>> to solve any of the problem.
>
> Hi Arve,
>
> sometimes it is a good thing not to try to solve all problems at once,
> in particular in API design.
>
> drawElement() is actually not any little bit more predictable than
> drawString(). If you disagree, please be specific.
Let's see. CSS and an element interface provides:
1) Specified and predictable white-space handling
2) Specified and predictable font and font-size handling (fallbacks,
relative and absolute sizes)
3) Specified and predictable line-height handling
4) Inline formatting
5) Color handling
A drawString would have to support all of these to be useful, and by that
time you'll have reinvented more of CSS than you'd want to.
var myEle = document.createElement('p');
myEle.textContent("Hello \nWorld");
// Or choose any other method of attaching style attributes to elements.
myEle.style = "color: blue; white-space: pre; font-size: 12px;
line-height: 2; width: 100px; height: 100px;"
// ...
myCanvas2dContext.drawImage(myEle.drawElement(),0,0)
Not too complicated.
--
Arve Bersvendsen, Opera Software ASA, http://www.opera.com/
Received on Tuesday, 14 November 2006 05:53:36 UTC