On 12 October 2013 09:28, Denis Kudriashov <dionisiydk@gmail.com> wrote:

2013/10/12 Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com>

So here is the display mini bench:

�� | text canvas m1 m2 |
�� canvas := FormCanvas extent:�� 569@399 depth: 32.

�� text := Compiler evaluate: (FileSystem workingDirectory parent parent parent / 'text.st' ) readStream contentsOfEntireFile .
�� m1 := TextMorph new.
�� m1 text: text textStyle: TextStyle default.
�� m1 wrapFlag: true.
�� m1 extent: 569@9999999.
�� MessageTally spyOn: [ 100 timesRepeat: [
�� m1 drawOn: canvas]].
�� m2 := TxTextMorph new.
�� m2 layoutStrategy: TxWrapTextStrategy new.
�� m2 extent: 569@9999999.
�� m2 newTextContents: text.
�� MessageTally spyOn: [ 100 timesRepeat: [
�� m2 drawOn: canvas]].

Squeak revised BitBltDisplayScanner 1077ms / Pharo MultiDisplayScanner 1229ms / Pharo TxText 1584ms

Interesting how Athens drawing will change picture

i hoping for the better.

i did many changes comparing to your original code,
and need to do some cleanup.

In athens to calculate layout i introduced a special role called "font metrics provider" , which is responsible for

calculating dimensions of separate glyphs and advance.
Right now it is hardcoded to use CairoFontMetricsProvider, but later it going to be refurbished

and merged with CairoFreetypeFontRenderer.

So you will be able to obtain one using:

fontRenderer := canvas setFont: aFont.

or:

fontRenderer := aFont glyphRendererOn: surface.

and once you got it, you can ask certain things from it:

fontRenderer getGlyphWidth: aCharacter

fontRenderer fontAscent

fontRenderer fontHeight

etc

but it is not fully organically merged yet, and need more thought what is public API of it to cover the needs of rendering text and/or measuring it.

--
Best regards,
Igor Stasenko.