Sylvain BERTRAND wrote:
> Unfortunately, the C toolkits over there are turning very bad:
> GTK+ and the EFL do depend on harfbuzz for their font layout
> computation which is an *really* ugly c++ object-oriented
> brainfuckage (uglier that the glib SDK dependencies!). I did a C
> port of harfbuzz (drop-in replacement), but for basic text layout
> (roman style). Then to keep your GUI suckless, you should package
> a version of a toolkit to allow trashing harfbuzz, or avoid crazy
> SDK deps... This is unfortunately more work.
Hello,
For a proof-of-concept, SDL (or X) is enough. The editor needs this
functionality:
- Draw shapes.
- Change curves of existing shapes.
- Change properties of existing shapes:
stroke width, stroke color, and fill color
- Load (paint[1] lets the user type 'rFILE' to load FILE)
- Save (paint[1] lets the user type 'wFILE' to save FILE)
- Nest/reference other files, like "symbols" in Adobe Flash.
SVG and Asymptote both look very complicated... PostScript is a good
output language but not a good source-file language. Maybe we need a
new source-file format. See the attached proposal.
How about a trio of programs like this?
vectorrender - render a file and forbid circular dependencies.
vectoredit - graphically edit a single file. fork()s to `vectorrender`
vector2ps - convert a file to PostScript.
[1]: http://man.cat-v.org/9front/1/paint
Start a new shape like this:
$ stroke-width stroke fill
For example...
$ 1.0 0x000000ff 0xff0000ff
Then give a list of curves in the form:
x y x2 y2 x3 y3
... where (x2, y2) and (x3, y3) are control points on the curve.
To close the shape, use a period (.) on a line by itself.
.
So, a full shape description looks like this:
$ 1 0x000000ff 0xff0000ff
0 0 0 0 0 0
100 0 100 0 100 0
100 100 100 100 100 100
0 100 0 100 0 100
.
Import and transform another file like this:
< filename sx rx tx ry sy ty
Where sx, rx, tx, ry, sy, and ty are the first two rows in a linear
transformation matrix. The file will be transformed by this matrix.
sx rx tx
ry sx ty
0 0 1
To import without transforming, just use these values:
< filename 1 0 0 0 1 0
