[V.9.1.1] request software-draw `lv_draw_sw_blend_color_to_a8(...)`

When canvas is created with draw_buf of type LV_COLOR_FORMAT_A8,
it is intended for use in masking and similar operations.

However, lv_draw_rect(..), which creates a task for software drawing,
may not function properly yet.
This could be because lv_draw_sw_blend_color_to_a8(...)
is not yet available?

The requested capability is to enable
the canvas to draw on draw_buf of type LV_COLOR_FORMAT_A8 too.

Thank you.


You can use LV_COLOR_FORMAT_L8 instead.