Merge branch 'master' of https://github.com/lvgl/lvgl

docs/ROADMAP.rst

@@ -27,6 +27,7 @@ Naming and API
 - |uncheck| Generic `lv_date_t` and `lv_time_t`
 - |uncheck| 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>`__)
+- |check| Gradient with alpha
 
 Architecture
 ~~~~~~~~~~~~
@@ -49,10 +50,13 @@ Architecture
 - |check| More color formats: 24 bit, ARGB1555, ARGB4444 etc
 - |uncheck| Add more feature to key presses (long press, release, etc).
   (see `here <https://forum.lvgl.io/t/keypad-input-device-why-lv-event-long-pressed-only-on-enter/10263>`__) 
-- |uncheck| Integrate `lv_msg` with the widgets to have an easy to use variable binding solution   
+- |uncheck| 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`?
 - |uncheck| Add GPU abstraction for display rotation 
 - |uncheck| Replace the `read_line_cb` of the image decoders with `get_area_cb`
 - |uncheck| Limit the image caching size in bytes instead of image count 
+- |uncheck| lv_draw_buf for unified stride, buffer and cache invalidation management. `4241 <https://github.com/lvgl/lvgl/pull/4241>`__
+- |uncheck| SVG support: integrate an SVG render library `4388 <https://github.com/lvgl/lvgl/issues/4388>`__
 
 Styles
 ~~~~~~
@@ -135,7 +139,6 @@ Drawing and rendering
 - |uncheck| Innter shadow
 - |uncheck| ARGB image stroke/grow on the alpha map
 - |uncheck| Real time blur
-- |uncheck| Gradient with alpha
 
 
 Widgets
@@ -152,8 +155,6 @@ Others
 - |uncheck| Named grid cells to allow updating layouts without touching the children (like CSS `grid-template-areas`)
 - |uncheck| Scene support. See `this comment <https://github.com/lvgl/lvgl/issues/2790#issuecomment-965100911>`__
 - |uncheck| Circle layout. #2871
-- |uncheck| 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`?
 - |uncheck| Consider `stagger animations <https://greensock.com/docs/v3/Staggers>`__.
 - |uncheck| Add custom indev type. See [here](https://github.com/lvgl/lvgl/issues/3298#issuecomment-1616706654).
 
@@ -162,19 +163,17 @@ 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.
+- Reconsider how to handle UTF-8 characters (allow different encoding too) and Bidi. Maybe create an abstraction for textshaping.
 - Consider direct binary font format support
 - Improve groups. `Discussion <https://forum.lvgl.io/t/lv-group-tabindex/2927/3>`__.
   Reconsider focusing logic. Allow having no widget selected (on web it's possible). Keep editing state in `lv_obj_t`
   (see `here <https://github.com/lvgl/lvgl/issues/3646>`__). Support slider
   left knob focusing (see `here <https://github.com/lvgl/lvgl/issues/3246>`__)
-- 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 <https://www.freecodecamp.org/news/the-revolution-of-pure-views-aed339db7da4/>`__)
 - Style components. (see `this comment <https://github.com/lvgl/lvgl/issues/2790#issuecomment-965100911>`__
-- 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

examples/get_started/lv_example_get_started_2.py

@@ -20,9 +20,9 @@ class CounterBtn():
         if code == lv.EVENT.CLICKED:
             self.cnt += 1
 
-        # Get the first child of the button which is the label and change its text
-        label = btn.get_child(0)
-        label.set_text("Button: " + str(self.cnt))
+            # Get the first child of the button which is the label and change its text
+            label = btn.get_child(0)
+            label.set_text("Button: " + str(self.cnt))
 
 
 counterBtn = CounterBtn()

src/core/lv_refr.c

@@ -247,10 +247,7 @@ void _lv_inv_area(lv_disp_t * disp, const lv_area_t * area_p)
     if(!disp) return;
     if(!lv_disp_is_invalidation_enabled(disp)) return;
 
-    if(disp->rendering_in_progress) {
-        LV_LOG_ERROR("detected modifying dirty areas in render");
-        return;
-    }
+    LV_ASSERT_MSG(!disp->rendering_in_progress, "Invalidate area is not allowed during rendering.");
 
     /*Clear the invalidate buffer if the parameter is NULL*/
     if(area_p == NULL) {

src/dev/disp/lcd/lv_nuttx_lcd.c

@@ -162,11 +162,12 @@ static lv_disp_t * lcd_init(int fd, int hor_res, int ver_res)
         return NULL;
     }
 
+    uint32_t px_size = lv_color_format_get_size(lv_disp_get_color_format(disp));
 #if LV_NUTTX_LCD_BUFFER_COUNT > 0
-    uint32_t buf_size = hor_res * ver_res * sizeof(lv_color_t);
+    uint32_t buf_size = hor_res * ver_res * px_size;
     lv_disp_render_mode_t render_mode = LV_DISP_RENDER_MODE_FULL;
 #else
-    uint32_t buf_size = hor_res * LV_NUTTX_LCD_BUFFER_SIZE * sizeof(lv_color_t);
+    uint32_t buf_size = hor_res * LV_NUTTX_LCD_BUFFER_SIZE * px_size;
     lv_disp_render_mode_t render_mode = LV_DISP_RENDER_MODE_PARTIAL;
 #endif
 

src/draw/sw/lv_draw_sw_img.c

@@ -168,7 +168,11 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_sw_img(lv_draw_unit_t * draw_unit, const lv_d
     bool transformed = draw_dsc->angle != 0 || draw_dsc->zoom != LV_ZOOM_NONE ? true : false;
 
     lv_img_decoder_dsc_t decoder_dsc;
-    lv_img_decoder_open(&decoder_dsc, draw_dsc->src, draw_dsc->recolor, -1);
+    lv_res_t res = lv_img_decoder_open(&decoder_dsc, draw_dsc->src, draw_dsc->recolor, -1);
+    if(res != LV_RES_OK) {
+        LV_LOG_ERROR("Failed to open image");
+        return;
+    }
     const uint8_t * src_buf = decoder_dsc.img_data;
 
     lv_color_format_t cf = decoder_dsc.header.cf;