fix(nanovg): support dynamic font engines (#9914)

src/draw/nanovg/lv_draw_nanovg_label.c

@@ -18,6 +18,7 @@
 #include "../../misc/cache/lv_cache_entry_private.h"
 #include "../../misc/lv_pending.h"
 #include "../../libs/freetype/lv_freetype.h"
+#include "../../font/lv_font_private.h"
 
 /*********************
 *      DEFINES
@@ -206,7 +207,6 @@ static inline int letter_get_image_handle(lv_draw_nanovg_unit_t * u, lv_font_gly
     letter_item_t search_key = { 0 };
     search_key.u = u;
     search_key.g_dsc = *g_dsc;
-    search_key.g_dsc.entry = NULL; /* Exclude the cache entry from the key */
 
     lv_cache_entry_t * cache_node_entry = lv_cache_acquire(u->letter_cache, &search_key, NULL);
     if(cache_node_entry == NULL) {
@@ -256,15 +256,19 @@ static bool letter_create_cb(letter_item_t * item, void * user_data)
         return false;
     }
 
-    if(!lv_font_get_glyph_bitmap(g_dsc, image_buf)) {
+    const lv_draw_buf_t * bitmap_draw_buf = (const lv_draw_buf_t *)lv_font_get_glyph_bitmap(g_dsc, image_buf);
+    if(!bitmap_draw_buf) {
         LV_PROFILER_DRAW_END;
         return false;
     }
 
     LV_PROFILER_DRAW_BEGIN_TAG("nvgCreateImage");
-    item->image_handle = nvgCreateImage(item->u->vg, w, h, 0, NVG_TEXTURE_ALPHA, lv_draw_buf_goto_xy(image_buf, 0, 0));
+    item->image_handle = nvgCreateImage(item->u->vg, w, h, 0, NVG_TEXTURE_ALPHA, lv_draw_buf_goto_xy(bitmap_draw_buf, 0,
+                                                                                                     0));
     LV_PROFILER_DRAW_END_TAG("nvgCreateImage");
 
+    lv_font_glyph_release_draw_data(g_dsc);
+
     LV_LOG_TRACE("image_handle: %d", item->image_handle);
     LV_PROFILER_DRAW_END;
     return true;
@@ -282,12 +286,7 @@ static void letter_free_cb(letter_item_t * item, void * user_data)
 
 static lv_cache_compare_res_t letter_compare_cb(const letter_item_t * lhs, const letter_item_t * rhs)
 {
-    int cmp_res = lv_memcmp(&lhs->g_dsc, &rhs->g_dsc, sizeof(lv_font_glyph_dsc_t));
-    if(cmp_res != 0) {
-        return cmp_res > 0 ? 1 : -1;
-    }
-
-    return 0;
+    return lv_font_glyph_dsc_compare(&lhs->g_dsc, &rhs->g_dsc);
 }
 
 

src/draw/vg_lite/lv_vg_lite_bitmap_font_cache.c

@@ -15,6 +15,7 @@
 #include "lv_vg_lite_pending.h"
 #include "lv_vg_lite_utils.h"
 #include "../../core/lv_global.h"
+#include "../../font/lv_font_private.h"
 
 /*********************
  *      DEFINES
@@ -189,16 +190,7 @@ static void cache_free_cb(cache_item_t * item, void * user_data)
 
 static lv_cache_compare_res_t cache_compare_cb(const cache_item_t * lhs, const cache_item_t * rhs)
 {
-    /* Because const font pointers are unique, matching can be performed using only the pointer. */
-    if(lhs->g_dsc.resolved_font != rhs->g_dsc.resolved_font) {
-        return lhs->g_dsc.resolved_font > rhs->g_dsc.resolved_font ? 1 : -1;
-    }
-
-    if(lhs->g_dsc.gid.index != rhs->g_dsc.gid.index) {
-        return lhs->g_dsc.gid.index > rhs->g_dsc.gid.index ? 1 : -1;
-    }
-
-    return 0;
+    return lv_font_glyph_dsc_compare(&lhs->g_dsc, &rhs->g_dsc);
 }
 
 #endif /*LV_USE_DRAW_VG_LITE*/

src/font/lv_font.c

@@ -8,6 +8,7 @@
  *********************/
 
 #include "lv_font.h"
+#include "lv_font_private.h"
 #include "../misc/lv_text_private.h"
 #include "../misc/lv_utils.h"
 #include "../misc/lv_log.h"
@@ -199,6 +200,30 @@ bool lv_font_has_static_bitmap(const lv_font_t * font)
     return font->static_bitmap;
 }
 
+int32_t lv_font_glyph_dsc_compare(const lv_font_glyph_dsc_t * lhs, const lv_font_glyph_dsc_t * rhs)
+{
+    if(lhs->resolved_font != rhs->resolved_font) {
+        return (lv_uintptr_t)lhs->resolved_font > (lv_uintptr_t)rhs->resolved_font ? 1 : -1;
+    }
+
+    int32_t ret = lhs->format - rhs->format;
+    if(ret != 0) {
+        return ret;
+    }
+
+    if(lhs->format == LV_FONT_GLYPH_FORMAT_IMAGE) {
+        if(lhs->gid.src == rhs->gid.src) {
+            return 0;
+        }
+        return (lv_uintptr_t)lhs->gid.src > (lv_uintptr_t)rhs->gid.src ? 1 : -1;
+    }
+
+    if(lhs->gid.index == rhs->gid.index) {
+        return 0;
+    }
+    return lhs->gid.index > rhs->gid.index ? 1 : -1;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

src/font/lv_font_private.h

@@ -0,0 +1,41 @@
+/**
+ * @file lv_font_private.h
+ *
+ */
+
+#ifndef LV_FONT_PRIVATE_H
+#define LV_FONT_PRIVATE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_font.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+int32_t lv_font_glyph_dsc_compare(const lv_font_glyph_dsc_t * lhs, const lv_font_glyph_dsc_t * rhs);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_FONT_PRIVATE_H*/
+