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+/**
+ * @file llfontfreetypesvg.h
+ * @brief Freetype font library SVG glyph rendering
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#pragma once
+
+#include <ft2build.h>
+#include FT_TYPES_H
+#include FT_MODULE_H
+#include FT_OTSVG_H
+
+ // See https://freetype.org/freetype2/docs/reference/ft2-svg_fonts.html
+class LLFontFreeTypeSvgRenderer
+{
+public:
+ // Called when the very first OT-SVG glyph is rendered (across the entire lifetime of our FT_Library object)
+ static FT_Error OnInit(FT_Pointer* state);
+
+ // Called when the ot-svg module is being freed (but only called if the init hook was called previously)
+ static void OnFree(FT_Pointer* state);
+
+ // Called to preset the glyph slot, twice per glyph:
+ // - when FT_Load_Glyph needs to preset the glyph slot (with cache == false)
+ // - right before the svg module calls the render callback hook. (with cache == true)
+ static FT_Error OnPresetGlypthSlot(FT_GlyphSlot glyph_slot, FT_Bool cache, FT_Pointer* state);
+
+ // Called to render an OT-SVG glyph (right after the preset hook OnPresetGlypthSlot was called with cache set to TRUE)
+ static FT_Error OnRender(FT_GlyphSlot glyph_slot, FT_Pointer* state);
+
+ // Called to deallocate our per glyph slot data
+ static void OnDataFinalizer(void* objectp);
+};