feat(font): add lv_font_glyph_release_draw_data api to release glyph data (#6052)

Co-authored-by: Benign X <1341398182@qq.com>

.github/workflows/check_style.yml

@@ -18,6 +18,7 @@ jobs:
         with:
           repository: szepeviktor/astyle
           path: astyle
+          ref: v3.4.10
       - name: Install astyle
         run: |
           cd astyle/build/gcc/

src/draw/lv_draw_label.c

@@ -438,8 +438,7 @@ static void draw_letter(lv_draw_unit_t * draw_unit, lv_draw_glyph_dsc_t * dsc,
     dsc->g = &g;
     cb(draw_unit, dsc, NULL, NULL);
 
-    if(g.resolved_font && font->release_glyph) {
-        font->release_glyph(font, &g);
-    }
+    lv_font_glyph_release_draw_data(&g);
+
     LV_PROFILER_END;
 }

src/font/lv_font.c

@@ -50,6 +50,15 @@ const void * lv_font_get_glyph_bitmap(lv_font_glyph_dsc_t * g_dsc, uint32_t lett
     return font_p->get_glyph_bitmap(g_dsc, letter, draw_buf);
 }
 
+void lv_font_glyph_release_draw_data(lv_font_glyph_dsc_t * g_dsc)
+{
+    const lv_font_t * font = g_dsc->resolved_font;
+
+    if(font != NULL && font->release_glyph) {
+        font->release_glyph(font, g_dsc);
+    }
+}
+
 bool lv_font_get_glyph_dsc(const lv_font_t * font_p, lv_font_glyph_dsc_t * dsc_out, uint32_t letter,
                            uint32_t letter_next)
 {

src/font/lv_font.h

@@ -133,6 +133,13 @@ const void * lv_font_get_glyph_bitmap(lv_font_glyph_dsc_t * g_dsc, uint32_t lett
 bool lv_font_get_glyph_dsc(const lv_font_t * font, lv_font_glyph_dsc_t * dsc_out, uint32_t letter,
                            uint32_t letter_next);
 
+/**
+ * Release the bitmap of a font.
+ * @note You must call @lv_font_get_glyph_dsc to get @g_dsc (@lv_font_glyph_dsc_t) before you can call this function.
+ * @param g_dsc         the glyph descriptor including which font to use, which supply the glyph_index and the format.
+ */
+void lv_font_glyph_release_draw_data(lv_font_glyph_dsc_t * g_dsc);
+
 /**
  * Get the width of a glyph with kerning
  * @param font          pointer to a font