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Sync up Kconfig with lv_config_template.h (#3508)

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* fix(config): remove LV_COLOR_16_SWAP related stuff

follow commit 5369d7d473

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

* fix(config): remove LV_COLOR_SCREEN_TRANSP related stuff

follow commit 5369d7d473

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao
2022-07-20 17:29:34 +08:00
committed by GitHub
parent a956b0bdba
commit 9ed5b3fe06
72 changed files with 65 additions and 5776 deletions
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2
docs/overview/color.md
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@@ -4,8 +4,6 @@ The color module handles all color-related functions like changing color depth,
The type `lv_color_t` is used to store a color. Its fields are set according to `LV_COLOR_DEPTH` in `lv_conf.h`. (See below)
You may set `LV_COLOR_16_SWAP` in `lv_conf.h` to swap bytes of *RGB565* colors. You may need this when sending 16-bit colors via a byte-oriented interface like SPI. As 16-bit numbers are stored in little-endian format (lower byte at the lower address), the interface will send the lower byte first. However, displays usually need the higher byte first. A mismatch in the byte order will result in highly distorted colors.
## Creating colors
### RGB

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docs/overview/display.md
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@@ -62,11 +62,9 @@ See the [Display background](#display-background) section for more details. If t
This configuration (transparent screen and display) could be used to create for example OSD menus where a video is played on a lower layer, and a menu is overlayed on an upper layer.
To handle transparent displays, special (slower) color mixing algorithms need to be used by LVGL so this feature needs to enabled with `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h`.
As this mode operates on the Alpha channel of the pixels `LV_COLOR_DEPTH = 32` is also required. The Alpha channel of 32-bit colors will be 0 where there are no objects and 255 where there are solid objects.
In summary, to enable transparent screens and displays for OSD menu-like UIs:
- Enable `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h`
- Be sure to use `LV_COLOR_DEPTH 32`
- Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_local_bg_opa(lv_scr_act(), LV_OBJMASK_PART_MAIN, LV_STATE_DEFAULT, LV_OPA_TRANSP)`
- Set the display opacity to `LV_OPA_TRANSP` with `lv_disp_set_bg_opa(NULL, LV_OPA_TRANSP);`