Roadmap¶
Planned for v9¶
Naming and API¶
[x]
lv_style_set_size()
should have separate width and height parameters[ ]
lv_img_set_src()
use "type-aware" parameter. See here[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`[ ] Reconsider the use of
has
,is
,enable
"action" keywords[x] Update canvas API (https://github.com/lvgl/lvgl/issues/3393)
[x]
LV_STYLE_PROP_INHERIT
->LV_STYLE_PROP_FLAG_INHERITABLE
LINK[x] Replace
disp_drv->direct_mode/full_refresh
with enum.[x] Consider flat directory structure. E.g.
extra/widgets
towidgets
[ ] Use
uint32_t
andint32_t
in APIs where possible. Consider hardcodinglv_coord_t
asint32_t
.[ ] To define a new stdlib API use defines
LV_USE_CUSTO_...
and let the user implementlv_...
functions somewhere (instead of defining the name of the custom functions)
Architecture¶
[x] Consider merging
lv_disp_t
,lv_disp_t
,lv_disp_draw_buf_t
,lv_draw_ctx_t
, andstruct
s from the new driver API (or only some of them)[ ] Better way to reset global variables in
lv_deinit()
#3385[x] New driver architecture #2720
[x]
draw_ctx->buffer_convert
? See here. Also remove 16 SWAPPED color format? See here.[ ] Reconsider masks. There should be a generic high level mask API whic is independent of the drawing engine.
[ ]
get_glyph_bitmap
should return an a8 bitmap that can be blended immediately.[ ] Reconsider how themes should work. See here.
[ ] Make LVGL render independent areas in parallel.
[ ] Introduce a pipeline in renderer to support multi-GPUs/Accelerators, such as 2D-capable-DMAs, 2D GPUs, dedicated processor cores for 2D tasks etc.
[x] More conscious
<std*.h>
wrapper API[x] Drop
lv_mem_buf_get
as tlsf should be fast enough for normal allocations too. Fragmentation is also lower if processes can completely clean up after themselves.[ ]
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.
[ ] Generic
lv_date_t
andlv_time_t
?[x] More color formats: 24 bit, ARGB1555, ARGB4444 etc
[ ] Unified caching #3116 #3415
[ ] Make layouts with an
lv_layout_dsc_t
instead of registering an ID+callback. See here[ ] Condider using
lv_color32_t
on APIs to support e.g. alpha gradient.
Styles¶
[ ] Make
style_bg_img
support9patch
images[ ] non-uniform scale of images: scale width and height differently
[ ] Scroll anim settings should come from styles to allow customization
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[ ]
lv_roller
make it more flexible #4009[ ] Universal scale widget/support (see here and #4043)
[ ] Improve
lv_label_align_t
#1656[ ] Disabled widgets should absorb indev actions without sending events. #3860
Drawing and rendering¶
[ ] Automatically recalculate the layout if a coordinte is get with
lv_obj_get_width/height/x/y/etc
Animations¶
[ ] Consider
anim
events to replace many callbacks with one[ ]
lv_anim_time_to_speed
should work differently to removestyle_anim_speed
. E.g. on large values of anim time store the speed. Besides all widgets should use thestyle_anim
property.anim
should clamp the time if it's calculated from speed, e.glv_clamp(200, t, 2000)
. (maybea->min_time/max_time
).[ ] Use dedicated
lv_anim_custom_exec_cb_t
. See here.
Planned in general¶
CI¶
[ ] Plaform independent bechmarking # 3443
[ ] Run static analyzer
[ ] Release script
[ ] Unit test for all widgets #2337
[ ] CI test for flash/RAM usage #3127
Architecture¶
[ ] C++ binding: https://github.com/lvgl/lv_binding_cpp
[ ] Markup language #2428
Styles¶
[ ] Hover
[ ] Global states in selectors. E.g.
LV_STATE_PRESSED | SMALL_SCREEN
like media quarry in CSS
Drawing and rendering¶
[ ] Different radius on each corner #2800
[ ] gradient to border/outline/shadow
[ ] multiple shadow/border
[ ] perspective
[ ] text shadow
[ ] innter shadow
[ ] ARGB image stroke/grow on the alpha map
[ ] real time blur
[ ] gradient with alpha
Widgets¶
[ ]
lv_bar
,lv_arc
: handle max < min for fill direction swapping #4039
Others¶
[ ] More grid features. E.g. repeat(auto-fill, minmax(
px, 1fr)) [ ] Named grid cells to allow updating layouts without touching the children (like CSS
grid-template-areas
)[ ] Scene support. See this comment
[ ] Circle layout. #2871
[ ] 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.
Ideas¶
Consider direct binary font format support
Improve groups. Discussion. Reconsider focusing logic. Allow having no widget selected (on web it's possible). Keep editing state in
lv_obj_t
(See here). Support slider left knob focusing (see here)lv_mem_alloc_aligned(size, align)
Speed up font decompression
Support larger images: add support for large image #1892
Functional programming support, pure view? See here
Style components. See this comment
SVG support: integrate an SVG render library
Support dot_begin and dot_middle long modes for labels
Allow matrix input for image transformation?
Radial/skew/conic gradient
Somehow let children inherit the parent's state
text on path