Mercurial > MadButterfly

annotate orgfiles/index.muse @ 1395:a768d74e5f49

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix the svg:use. For a svg:use, it is a group which include the content it reference. It means that we can not tween it to its origin object directly. Instead, we need to ungroup it and then use the result matrix to generate the tweened transformation matrix. Therefore, we need to concate its matrix to the referenced object. Ad center object when the bbox-x is not available.
author wycc
date Sat, 02 Apr 2011 05:36:36 +0800
parents 6eecdd331fe7
children
rev   line source
0
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
1 * MadButterfly
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
2 #MadButterfly
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
3 MadButterfly is a [[#SVG][SVG]] browser, HTML browser (ex, Firefox) is a HTML
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
4 respective one. MadButterfly only understand SVG, controlling from users,
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
5 and API for applications base on it. It is supposed to be a GUI framework
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
6 for applications. The host applications can interact with MadButterfly
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
7 like Javascript applications interacts with DOM objects. MadButterfly
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
8 is a GUI evnironment based on SVG technologies for desktop and mobile
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
9 device. It tries to make the work of programmers closed to client-side
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
10 Javascript ones.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
11
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
12 MadButterfly is a SVG browser, it can be used to implement file manager,
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
13 UI of commerical application for business, and even window manager for
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
14 X Window. We try to implement MadButterfly as a library that can be
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
15 embedded by host programs. It is alike Firefox been embedded by
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
16 host programs.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
17
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
18 * SVG
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
19 #SVG
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
20 SVG is "Scalable Vector Graphics". It is a standard of W3C.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
21 MadButterfly implements [[http://www.w3.org/TR/SVGMobile12/][SVG Tiny 1.2]], a simplified version of SVG for
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
22 mobile devices.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
23
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
24 * Design
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
25 Most notable of SVG, except sharps, is coordination transforms. To make
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
26 MadButterfly efficiency, the execution of code should highly leverage
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
27 time locality and spartial locality. So, we should aggregate computation
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
28 of a function together. The data of container and contained elements
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
29 should also be aggregated together.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
30
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
31 Since the attributes of SVG objects will be chagned frequently,
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
32 unnecessarily recomputing for coordination transforms should be avoided.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
33 A sequential number should be attached to the objects to ditinguish
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
34 dirty transformation result and recompute it when it is needed.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
35
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
36 ** Aggregate Computation
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
37 Every update potentially invokes a function for every graphic elements.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
38 To be efficient, calls of a function are collected into a loop to avoid
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
39 overhead of function calls. It also avoid interleaving of calls of
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
40 functions to leverage time locality of code cache.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
41
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
42 ** Aggregate Relative Data
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
43 Changes of a container usually effect contained elements. So, it had
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
44 better to put container together with contained elements to increase
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
45 hit rate of cache.
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
46
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
47 * Transform
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
48 If a coordination transformation transforms (x, y) to (x', y'), then
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
49 > x' = xa * x + xb * y + xc
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
50 > y' = ya * x + yb * y + yc
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
51 is equal to
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
52 > | xa xb xc | | x |
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
53 > | ya yb yc | * | y |
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
54 > | 0 0 1 | | 1 |
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
55
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
56 A transform function of a element to canvas is production of all
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
57 transform functions of containers, it is called aggregated transform
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
58 function. The aggregated transform function of elements are
5aca939dbfbe MatButterfly is a SVG browser
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
59 computed with [[http://en.wikipedia.org/wiki/Dynamic_programming][dynamic programming]].
9
6eecdd331fe7 Fix bug in testcase
Thinker K.F. Li <thinker@branda.to>
parents: 0
diff changeset
60
6eecdd331fe7 Fix bug in testcase
Thinker K.F. Li <thinker@branda.to>
parents: 0
diff changeset
61 ** Use Absolute
6eecdd331fe7 Fix bug in testcase
Thinker K.F. Li <thinker@branda.to>
parents: 0
diff changeset
62 Since we need to tranform positions, positions are transform to
6eecdd331fe7 Fix bug in testcase
Thinker K.F. Li <thinker@branda.to>
parents: 0
diff changeset
63 absolute coordinations if they are specified relative. It is
6eecdd331fe7 Fix bug in testcase
Thinker K.F. Li <thinker@branda.to>
parents: 0
diff changeset
64 fine when a relative position are rotated or resized. But, it
6eecdd331fe7 Fix bug in testcase
Thinker K.F. Li <thinker@branda.to>
parents: 0
diff changeset
65 would be wrong when shifting.