feat(esp_lvgl_port): Add rounder_cb option for displays (BSP-705)

components/esp_lvgl_port/CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## [Unreleased]
 
+### Features
+- Added option to include a rounder callback
+
 ### Fixes
 - Fixed deinitialization of the task which was created with caps - https://github.com/espressif/esp-bsp/issues/680
 - Call lv_deinit() - https://github.com/espressif/esp-bsp/issues/635

components/esp_lvgl_port/README.md

@@ -64,6 +64,7 @@ Add an LCD screen to the LVGL. It can be called multiple times for adding multip
         .monochrome = false,
         .mipi_dsi = false,
         .color_format = LV_COLOR_FORMAT_RGB565,
+        .rounder_cb = my_rounder_cb,
         .rotation = {
             .swap_xy = false,
             .mirror_x = false,

components/esp_lvgl_port/include/esp_lvgl_port_disp.h

@@ -33,6 +33,11 @@ typedef struct {
     bool mirror_y; /*!< LCD Screen mirrored Y (in esp_lcd driver) */
 } lvgl_port_rotation_cfg_t;
 
+/**
+ * @brief Rounder callback
+ */
+typedef void (*lvgl_port_rounder_cb_t)(lv_area_t *area);
+
 /**
  * @brief Configuration display structure
  */
@@ -51,6 +56,7 @@ typedef struct {
     bool        monochrome;     /*!< True, if display is monochrome and using 1bit for 1px */
 
     lvgl_port_rotation_cfg_t rotation;      /*!< Default values of the screen rotation (Only HW state. Not supported for default SW rotation!) */
+    lvgl_port_rounder_cb_t   rounder_cb;      /*!< Rounder callback for display area */
 #if LVGL_VERSION_MAJOR >= 9
     lv_color_format_t        color_format;  /*!< The color format of the display */
 #endif

components/esp_lvgl_port/src/lvgl9/esp_lvgl_port_disp.c

@@ -751,6 +751,12 @@ static void lvgl_port_disp_size_update_callback(lv_event_t *e)
 
 static void lvgl_port_display_invalidate_callback(lv_event_t *e)
 {
+    lvgl_port_display_ctx_t *disp_ctx = (lvgl_port_display_ctx_t *)lv_event_get_user_data(e);
+    lv_area_t *area = (lv_area_t *)lv_event_get_param(e);
+    if (area != NULL && disp_ctx != NULL && disp_ctx->rounder_cb != NULL) {
+        disp_ctx->rounder_cb(area);
+    }
+
     /* Wake LVGL task, if needed */
     lvgl_port_task_wake(LVGL_PORT_EVENT_DISPLAY, NULL);
 }