Fonts: adding ImFontHooks for codepoint remapping.

imgui.h

@@ -177,6 +177,7 @@ struct ImFontBaked;                 // Baked data for a ImFont at a given size.
 struct ImFontConfig;                // Configuration data when adding a font or merging fonts
 struct ImFontGlyph;                 // A single font glyph (code point + coordinates within in ImFontAtlas + offset)
 struct ImFontGlyphRangesBuilder;    // Helper to build glyph ranges from text/string data
+struct ImFontHooks;                 // Opaque interface to font hooks
 struct ImFontLoader;                // Opaque interface to a font loading backend (stb_truetype, FreeType etc.).
 struct ImTextureData;               // Specs and pixel storage for a texture used by Dear ImGui.
 struct ImTextureRect;               // Coordinates of a rectangle within a texture.
@@ -3682,6 +3683,7 @@ struct ImFontAtlas
     const ImFontLoader*         FontLoader;         // Font loader opaque interface (default to stb_truetype, can be changed to use FreeType by defining IMGUI_ENABLE_FREETYPE). Don't set directly!
     const char*                 FontLoaderName;     // Font loader name (for display e.g. in About box) == FontLoader->Name
     void*                       FontLoaderData;     // Font backend opaque storage
+    const ImFontHooks*          FontHooks;          // Shared font hooks for all fonts.
     unsigned int                FontBuilderFlags;   // [FIXME: Should be called FontLoaderFlags] Shared flags (for all fonts) for font loader. THIS IS BUILD IMPLEMENTATION DEPENDENT (e.g. . Per-font override is also available in ImFontConfig.
     int                         RefCount;           // Number of contexts using this atlas
 
@@ -3769,6 +3771,7 @@ struct ImFont
     float                       Scale;              // 4     // in  // Base font scale (~1.0f), multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
     ImU8                        Used8kPagesMap[(IM_UNICODE_CODEPOINT_MAX+1)/8192/8]; // 1 bytes if ImWchar=ImWchar16, 16 bytes if ImWchar==ImWchar32. Store 1-bit for each block of 4K codepoints that has one active glyph. This is mainly used to facilitate iterations across all used codepoints.
     bool                        EllipsisAutoBake;   // 1     //     // Mark when the "..." glyph needs to be generated.
+    const ImFontHooks*          FontHooks;          // 8     // in  // Custom font hooks for the font.
 
     // Methods
     IMGUI_API ImFont();