feat(nuttx_image_cache): add configuration to use image cache heap for default heap (#7653)

Kconfig

@@ -1832,6 +1832,11 @@ menu "LVGL configuration"
 			depends on LV_USE_NUTTX
 			default n
 
+		config LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+			bool "Use independent image heap for default draw buffer"
+			depends on LV_USE_NUTTX_INDEPENDENT_IMAGE_HEAP
+			default n
+
 		config LV_USE_NUTTX_LIBUV
 			bool "Use uv loop to replace default timer loop and other fb/indev timers"
 			depends on LV_USE_NUTTX && LIBUV

lv_conf_template.h

@@ -1155,6 +1155,9 @@
 #if LV_USE_NUTTX
     #define LV_USE_NUTTX_INDEPENDENT_IMAGE_HEAP 0
 
+    /** Use independent image heap for default draw buffer */
+    #define LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP    0
+
     #define LV_USE_NUTTX_LIBUV    0
 
     /** Use Nuttx custom init API to open window and handle touchscreen */

src/drivers/nuttx/lv_nuttx_image_cache.c

@@ -44,6 +44,11 @@ typedef struct {
 
     lv_draw_buf_malloc_cb malloc_cb;
     lv_draw_buf_free_cb free_cb;
+
+#if LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+    lv_draw_buf_malloc_cb malloc_cb_default;
+    lv_draw_buf_free_cb free_cb_default;
+#endif
 } lv_nuttx_ctx_image_cache_t;
 /**********************
  *  STATIC PROTOTYPES
@@ -77,6 +82,15 @@ void lv_nuttx_image_cache_init(bool use_independent_image_heap)
     handlers->buf_malloc_cb = malloc_cb;
     handlers->buf_free_cb = free_cb;
 
+#if LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+    handlers = lv_draw_buf_get_handlers();
+    ctx->malloc_cb_default = handlers->buf_malloc_cb;
+    ctx->free_cb_default = handlers->buf_free_cb;
+
+    handlers->buf_malloc_cb = malloc_cb;
+    handlers->buf_free_cb = free_cb;
+#endif
+
     ctx->initialized = false;
     ctx->independent_image_heap = use_independent_image_heap;
 }
@@ -93,6 +107,13 @@ FREE_CONTEXT:
     lv_draw_buf_handlers_t * handlers = image_cache_draw_buf_handlers;
     handlers->buf_malloc_cb = ctx->malloc_cb;
     handlers->buf_free_cb = ctx->free_cb;
+
+#if LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+    handlers = lv_draw_buf_get_handlers();
+    handlers->buf_malloc_cb = ctx->malloc_cb_default;
+    handlers->buf_free_cb = ctx->free_cb_default;
+#endif
+
     lv_free(ctx);
 
     ctx = NULL;

src/lv_conf_internal.h

@@ -3730,6 +3730,15 @@
         #endif
     #endif
 
+    /** Use independent image heap for default draw buffer */
+    #ifndef LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+        #ifdef CONFIG_LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+            #define LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP CONFIG_LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP
+        #else
+            #define LV_NUTTX_DEFAULT_DRAW_BUF_USE_INDEPENDENT_IMAGE_HEAP    0
+        #endif
+    #endif
+
     #ifndef LV_USE_NUTTX_LIBUV
         #ifdef CONFIG_LV_USE_NUTTX_LIBUV
             #define LV_USE_NUTTX_LIBUV CONFIG_LV_USE_NUTTX_LIBUV