LVGL 库提交

2026-08-30 08:57:07 +08:00
parent 26c9098630
commit e2f199c6bf
1056 changed files with 556743 additions and 45 deletions
@@ -0,0 +1,95 @@
+/**
+ * @file lv_utils.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_utils.h"
+#include "lv_fs.h"
+#include "lv_types.h"
+#include "cache/lv_cache.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+void * lv_utils_bsearch(const void * key, const void * base, size_t n, size_t size,
+                        int (*cmp)(const void * pRef, const void * pElement))
+{
+    const char * middle;
+    int32_t c;
+
+    for(middle = base; n != 0;) {
+        middle += (n / 2) * size;
+        if((c = (*cmp)(key, middle)) > 0) {
+            n    = (n / 2) - ((n & 1) == 0);
+            base = (middle += size);
+        }
+        else if(c < 0) {
+            n /= 2;
+            middle = base;
+        }
+        else {
+            return (char *)middle;
+        }
+    }
+    return NULL;
+}
+
+lv_result_t lv_draw_buf_save_to_file(const lv_draw_buf_t * draw_buf, const char * path)
+{
+    lv_fs_file_t file;
+    lv_fs_res_t res = lv_fs_open(&file, path, LV_FS_MODE_WR);
+    if(res != LV_FS_RES_OK) {
+        LV_LOG_ERROR("create file %s failed", path);
+        return LV_RESULT_INVALID;
+    }
+
+    /*Image content modified, invalidate image cache.*/
+    lv_image_cache_drop(path);
+
+    uint32_t bw;
+    res = lv_fs_write(&file, &draw_buf->header, sizeof(draw_buf->header), &bw);
+    if(res != LV_FS_RES_OK || bw != sizeof(draw_buf->header)) {
+        LV_LOG_ERROR("write draw_buf->header failed");
+        lv_fs_close(&file);
+        return LV_RESULT_INVALID;
+    }
+
+    res = lv_fs_write(&file, draw_buf->data, draw_buf->data_size, &bw);
+    if(res != LV_FS_RES_OK || bw != draw_buf->data_size) {
+        LV_LOG_ERROR("write draw_buf->data failed");
+        lv_fs_close(&file);
+        return LV_RESULT_INVALID;
+    }
+
+    lv_fs_close(&file);
+    LV_LOG_TRACE("saved draw_buf to %s", path);
+    return LV_RESULT_OK;
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/