115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
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/****************************************************************************
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*
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* otsvg.h
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*
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* Interface for OT-SVG support related things (specification).
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*
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* Copyright (C) 2022 by
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* David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
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*
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* This file is part of the FreeType project, and may only be used,
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* modified, and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*
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*/
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#ifndef OTSVG_H_
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#define OTSVG_H_
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#include <freetype/freetype.h>
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#ifdef FREETYPE_H
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#error "freetype.h of FreeType 1 has been loaded!"
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#error "Please fix the directory search order for header files"
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#error "so that freetype.h of FreeType 2 is found first."
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#endif
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FT_BEGIN_HEADER
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/**************************************************************************
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*
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* @struct:
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* FT_SVG_DocumentRec_
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*
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* @description:
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* A structure that models one SVG document.
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*
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* @fields:
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* svg_document ::
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* A pointer to the SVG document.
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*
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* svg_document_length ::
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* The length of `svg_document`.
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*
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* metrics ::
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* A metrics object storing the size information.
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*
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* units_per_EM ::
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* The size of the EM square.
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*
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* start_glyph_id ::
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* The first glyph ID in the glyph range covered by this document.
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*
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* end_glyph_id ::
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* The last glyph ID in the glyph range covered by this document.
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*
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* transform ::
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* A 2x2 transformation matrix to apply to the glyph while rendering
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* it.
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*
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* delta ::
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* The translation to apply to the glyph while rendering.
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*
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* @note:
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* When the slot is passed down to a renderer, the renderer can only
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* access the `metrics` and `units_per_EM` fields via `slot->face`.
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* However, when `FT_Glyph_To_Bitmap` sets up a dummy object, it has no
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* way to set a `face` object. Thus, metrics information and
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* `units_per_EM` (which is necessary for OT-SVG) has to be stored
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* separately.
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*
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* @since:
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* 2.12
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*/
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typedef struct FT_SVG_DocumentRec_
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{
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FT_Byte* svg_document;
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FT_ULong svg_document_length;
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FT_Size_Metrics metrics;
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FT_UShort units_per_EM;
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FT_UShort start_glyph_id;
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FT_UShort end_glyph_id;
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FT_Matrix transform;
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FT_Vector delta;
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} FT_SVG_DocumentRec;
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/**************************************************************************
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*
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* @type:
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* FT_SVG_Document
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*
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* @description:
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* A handle to an @FT_SVG_DocumentRec object.
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*
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* @since:
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* 2.12
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*/
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typedef struct FT_SVG_DocumentRec_* FT_SVG_Document;
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FT_END_HEADER
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#endif /* OTSVG_H_ */
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/* END */
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