docs: finishes conversion of ROADMAP.rst file (#4182)

docs/ROADMAP.rst

@@ -1,8 +1,11 @@
-# Roadmap
+Roadmap
+=======
 
-## Planned for v9
+Planned for v9
+--------------
 
-### Naming and API
+Naming and API
+~~~~~~~~~~~~~~
 - [x] `lv_style_set_size()` should have separate width and height parameters
 - [x] Reconsider image color formats.
 - [ ] More consistent names:`remove/clear/delete/del`, `offset/ofs`, `add/create/register`, `id/idx/index`, `middle/mid/center`, `img/image`, `txt/text`, `opa/opacity/alpha`, `scr/screen`, `disp, display`, `finished/complete/completed/ready`, `buf/buffer`, `..._cb`, angle, rotation`, `zoom, scale`
@@ -16,7 +19,9 @@
 - [ ] Generic `lv_date_t` and `lv_time_t`
 - [ ] Make layouts with an `lv_layout_dsc_t` instead of registering an ID + callback. See [here](https://github.com/lvgl/lvgl/issues/3481#issuecomment-1206434501)
 
-### Architecture
+Architecture
+~~~~~~~~~~~~
+
 - [x] Consider merging `lv_disp_drv_t`, `lv_disp_t`, `lv_disp_draw_buf_t`, `lv_draw_ctx_t`, and `struct`s from the new driver API (or only some of them)
 - [x] New driver architecture #2720
 - [x] `draw_ctx->buffer_convert`? See [here](https://github.com/lvgl/lvgl/issues/3379#issuecomment-1147954592).  Also remove 16 SWAPPED color format? See [here](https://github.com/lvgl/lvgl/issues/3379#issuecomment-1140886258).
@@ -30,12 +35,15 @@
 - [ ] Unified caching #3116 #3415
 - [ ] Condider using `lv_color32_t` on APIs to support e.g. alpha gradient.
 
-### Styles
+Styles
+~~~~~~
 - [ ] Make `style_bg_img` support `9patch` images
 - [ ] non-uniform scale of images: scale width and height differently
 - [ ] Scroll anim settings should come from styles to allow customization
 
-### Widgets
+Widgets
+~~~~~~~
+
 - [ ] `lv_img`: Reconsider image sizing models (when the image size is not content): center, top-left, zoom, tile, other?
 - [ ] `lv_tabview` Replace button matrix with real buttons for more flexibility
 - [ ] `lv_label` reconsider label long modes. (support min/max-width/height too) #3420
@@ -44,32 +52,45 @@
 - [ ] Improve `lv_label_align_t` #1656
 - [ ] Disabled widgets should absorb indev actions without sending events. [#3860](https://github.com/lvgl/lvgl/issues/3860)
 
-### Drawing and rendering
+Drawing and rendering
-- [ ] Automatically recalculate the layout if a coordinate is get with `lv_obj_get_width/height/x/y/etc`
+~~~~~~~~~~~~~~~~~~~~~
+
+- [ ] Automatically recalculate the layout if a coordinte is get with `lv_obj_get_width/height/x/y/etc`
+
+Animations
+~~~~~~~~~~
 
- ### Animations
 - [ ] Use `anim` events to replace many callbacks with one
 - [ ] `lv_anim_time_to_speed` should work differently to remove `style_anim_speed`. E.g. on large values of anim time store the speed.   Besides all widgets should use the `style_anim` property. `anim` should clamp the time if it's calculated from speed, e.g `lv_clamp(200, t, 2000)`. (maybe `a->min_time/max_time`).
 - [ ] Use dedicated `lv_anim_custom_exec_cb_t`. See [here](https://forum.lvgl.io/t/custom-exec-cb-prevents-lv-anim-del-obj-null/10266).
 
-## Planned in general
+Planned in general
+------------------
 
-### CI
+CI
-- [ ] Platform independent benchmarking #3443
+~~
+
+- [ ] Plaform independent bechmarking #3443
 - [ ] Run static analyzer
 - [ ] Release script
 - [ ] Unit test for all widgets #2337
 - [ ] CI test for flash/RAM usage #3127
 
-### Architecture
+Architecture
+~~~~~~~~~~~~
+
 - [ ] C++ binding: https://github.com/lvgl/lv_binding_cpp
 - [ ] Markup language #2428
 
-### Styles
+Styles
+~~~~~~
+
 - [ ] Hover
 - [ ] Global states in selectors. E.g. `LV_STATE_PRESSED | SMALL_SCREEN` like media quarry in CSS
 
-### Drawing and rendering
+Drawing and rendering
+~~~~~~~~~~~~~~~~~~~~~
+
 - [ ] SW: Line drawing with image rotation
 - [ ] SW: Arc drawing from small squares (16x16?) to detect transparent or solid parts
 - [ ] SW: Rounded rectangle drawing from small squares (16x16?) to detect transparent or solid parts
@@ -83,18 +104,23 @@
 - [ ] Real time blur
 - [ ] Gradient with alpha
 
-### Widgets
+Widgets
+~~~~~~~
 - [ ] `lv_bar`, `lv_arc`: handle max < min for fill direction swapping #4039 
 
-### Others
+Others
+~~~~~~
+
 - [ ] More grid features. E.g. repeat(auto-fill, minmax( <value> px, 1fr))
 - [ ] Named grid cells to allow updating layouts without touching the children (like CSS `grid-template-areas`)
 - [ ] Scene support. See [this comment](https://github.com/lvgl/lvgl/issues/2790#issuecomment-965100911)
 - [ ] Circle layout. #2871
-- [ ] Variable binding. I.e create properties which can be bound to objects and those objects are notified on value change. Maybe based on `lv_msg`?
+- [ ] Variable binding. I.e create properties which can be bound to objects and those obejcts are notified on value change. Maybe based on `lv_msg`?
 - [ ] Consider [stagger animations](https://greensock.com/docs/v3/Staggers).
  
-## Ideas
+Ideas
+-----
+
 - Better way to reset global variables in `lv_deinit()` #3385
 - `lv_array`: replace linked lists with array where possible (arrays are faster and uses less memory)
 - Reconsider how to handle UTF-8 characters (allow different encoding too) and Bidi. Maybe create an abstraction for typesetting.