Fonts: ImFontConfig::GlyphExcludeRanges is owner and copied.

imgui.cpp

@@ -2011,6 +2011,12 @@ char* ImStrdup(const char* str)
     return (char*)memcpy(buf, (const void*)str, len + 1);
 }
 
+void* ImMemdup(const void* src, size_t size)
+{
+    void* dst = IM_ALLOC(size);
+    return memcpy(dst, src, size);
+}
+
 char* ImStrdupcpy(char* dst, size_t* p_dst_size, const char* src)
 {
     size_t dst_buf_size = p_dst_size ? *p_dst_size : ImStrlen(dst) + 1;

imgui.h

@@ -3434,7 +3434,7 @@ struct ImFontConfig
     //ImVec2        GlyphExtraSpacing;      // 0, 0     // (REMOVED AT IT SEEMS LARGELY OBSOLETE. PLEASE REPORT IF YOU WERE USING THIS). Extra spacing (in pixels) between glyphs when rendered: essentially add to glyph->AdvanceX. Only X axis is supported for now.
     ImVec2          GlyphOffset;            // 0, 0     // Offset (in pixels) all glyphs from this font input. Absolute value for default size, other sizes will scale this value.
     const ImWchar*  GlyphRanges;            // NULL     // THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE. Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list).
-    const ImWchar*  GlyphExcludeRanges;     // NULL     // THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE. Pointer to a VERY SHORT user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list). This is very close to GlyphRanges[] but designed to exclude ranges from a font source, when merging fonts with overlapping glyphs.
+    const ImWchar*  GlyphExcludeRanges;     // NULL     // Pointer to a VERY SHORT user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list). This is very close to GlyphRanges[] but designed to exclude ranges from a font source, when merging fonts with overlapping glyphs.
     float           GlyphMinAdvanceX;       // 0        // Minimum AdvanceX for glyphs, set Min to align font icons, set both Min/Max to enforce mono-space font. Absolute value for default size, other sizes will scale this value.
     float           GlyphMaxAdvanceX;       // FLT_MAX  // Maximum AdvanceX for glyphs
     float           GlyphExtraAdvanceX;     // 0        // Extra spacing (in pixels) between glyphs. Please contact us if you are using this.

imgui_draw.cpp

@@ -2644,11 +2644,7 @@ void ImFontAtlas::ClearInputData()
         const ImFontLoader* loader = font_cfg.FontLoader ? font_cfg.FontLoader : FontLoader;
         if (loader && loader->FontSrcDestroy != NULL)
             loader->FontSrcDestroy(this, &font_cfg);
-        if (font_cfg.FontData && font_cfg.FontDataOwnedByAtlas)
-        {
-            IM_FREE(font_cfg.FontData);
-            font_cfg.FontData = NULL;
-        }
+        ImFontAtlasBuildDiscardFontSource(this, &font_cfg);
     }
 
     // When clearing this we lose access to the font name and other information used to build the font.
@@ -2969,6 +2965,17 @@ bool ImFontAtlas::Build()
 }
 #endif // #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
 
+void ImFontAtlasBuildDiscardFontSource(ImFontAtlas* atlas, ImFontConfig* src)
+{
+    IM_UNUSED(atlas);
+    if (src->FontDataOwnedByAtlas)
+        IM_FREE(src->FontData);
+    if (src->GlyphExcludeRanges)
+        IM_FREE((void*)src->GlyphExcludeRanges);
+    src->FontData = NULL;
+    src->GlyphExcludeRanges = NULL;
+}
+
 ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg)
 {
     IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas!");
@@ -3001,9 +3008,8 @@ ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg)
         new_font_cfg.DstFont = font;
     if (!new_font_cfg.FontDataOwnedByAtlas)
     {
-        new_font_cfg.FontData = IM_ALLOC(new_font_cfg.FontDataSize);
         new_font_cfg.FontDataOwnedByAtlas = true;
-        memcpy(new_font_cfg.FontData, font_cfg->FontData, (size_t)new_font_cfg.FontDataSize);
+        new_font_cfg.FontData = ImMemdup(font_cfg->FontData, (size_t)new_font_cfg.FontDataSize);
     }
 
     // Sanity check
@@ -3013,6 +3019,7 @@ ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg)
         for (const ImWchar* p = font_cfg->GlyphExcludeRanges; p[0] != 0; p++, size++) {}
         IM_ASSERT((size & 1) == 0 && "GlyphExcludeRanges[] size must be multiple of two!");
         IM_ASSERT((size <= 64) && "GlyphExcludeRanges[] size must be small!");
+        new_font_cfg.GlyphExcludeRanges = (ImWchar*)ImMemdup(font_cfg->GlyphExcludeRanges, sizeof(font_cfg->GlyphExcludeRanges[0]) * (size + 1));
     }
     if (font_cfg->FontLoader != NULL)
         IM_ASSERT(font_cfg->FontLoader->FontBakedLoadGlyph != NULL);
@@ -3029,8 +3036,7 @@ ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg)
     if (!ImFontAtlasBuildAddFont(this, &new_font_cfg))
     {
         // Rollback (this is a fragile/rarely exercised code-path. TestSuite's "misc_atlas_add_invalid_font" aim to test this)
-        if (new_font_cfg.FontDataOwnedByAtlas)
-            IM_FREE(new_font_cfg.FontData);
+        ImFontAtlasBuildDiscardFontSource(this, &new_font_cfg);
         Sources.pop_back();
         if (!font_cfg->MergeMode)
         {

imgui_internal.h

@@ -389,6 +389,7 @@ IMGUI_API int           ImStricmp(const char* str1, const char* str2);
 IMGUI_API int           ImStrnicmp(const char* str1, const char* str2, size_t count);       // Case insensitive compare to a certain count.
 IMGUI_API void          ImStrncpy(char* dst, const char* src, size_t count);                // Copy to a certain count and always zero terminate (strncpy doesn't).
 IMGUI_API char*         ImStrdup(const char* str);                                          // Duplicate a string.
+IMGUI_API void*         ImMemdup(const void* src, size_t size);                             // Duplicate a chunk of memory.
 IMGUI_API char*         ImStrdupcpy(char* dst, size_t* p_dst_size, const char* str);        // Copy in provided buffer, recreate buffer if needed.
 IMGUI_API const char*   ImStrchrRange(const char* str_begin, const char* str_end, char c);  // Find first occurrence of 'c' in string range.
 IMGUI_API const char*   ImStreolRange(const char* str, const char* str_end);                // End end-of-line
@@ -3778,6 +3779,7 @@ IMGUI_API bool              ImFontAtlasBuildAddFont(ImFontAtlas* atlas, ImFontCo
 IMGUI_API void              ImFontAtlasBuildSetupFontSpecialGlyphs(ImFontAtlas* atlas, ImFont* font, ImFontConfig* src);
 IMGUI_API void              ImFontAtlasBuildDiscardBakes(ImFontAtlas* atlas, int unused_frames);
 IMGUI_API void              ImFontAtlasBuildDiscardFont(ImFontAtlas* atlas, ImFont* font);
+IMGUI_API void              ImFontAtlasBuildDiscardFontSource(ImFontAtlas* atlas, ImFontConfig* src);
 IMGUI_API ImFontBaked*      ImFontAtlasBuildAddFontBaked(ImFontAtlas* atlas, ImFont* font, float font_size, ImGuiID baked_id);
 IMGUI_API ImFontBaked*      ImFontAtlasBuildGetClosestFontBakedMatch(ImFontAtlas* atlas, ImFont* font, float font_size);
 IMGUI_API void              ImFontAtlasBuildDiscardFontBaked(ImFontAtlas* atlas, ImFont* font, ImFontBaked* baked);