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/* Copyright (C) 2003 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: ttobjs.h,v 1.6 2004/10/06 11:32:17 igor Exp $ */
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/* Changes after FreeType: cut out the TrueType instruction interpreter. */
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/*******************************************************************
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*
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* ttobjs.h 1.0
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*
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* Objects definition unit.
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*
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* Copyright 1996-1998 by
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* David Turner, Robert Wilhelm, and Werner Lemberg.
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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 TTOBJS_H
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#define TTOBJS_H
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#include "ttcommon.h"
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#include "tttypes.h"
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#include "tttables.h"
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#include <setjmp.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* */
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/* This file contains the definitions and methods of the four */
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/* kinds of objects managed by the FreeType engine. These are: */
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/* */
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/* */
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/* Face objects: */
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/* */
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/* There is always one face object per opened TrueType font */
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/* file, and only one. The face object contains data that is */
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/* independent of current transform/scaling/rotation and */
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/* pointsize, or glyph index. This data is made of several */
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/* critical tables that are loaded on face object creation. */
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/* */
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/* A face object tracks all active and recycled objects of */
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/* the instance and execution context classes. Destroying a face */
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/* object will automatically destroy all associated instances. */
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/* */
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/* */
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/* Instance objects: */
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/* */
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/* An instance object always relates to a given face object, */
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/* known as its 'parent' or 'owner', and contains only the */
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/* data that is specific to one given pointsize/transform of */
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/* the face. You can only create an instance from a face object. */
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/* */
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/* An instance's current transform/pointsize can be changed */
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/* at any time using a single high-level API call, */
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/* TT_Reset_Instance(). */
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/* */
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/* Execution Context objects: */
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/* */
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/* An execution context (or context in short) relates to a face. */
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/* It contains the data and tables that are necessary to load */
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/* and hint (i.e. execute the glyph instructions of) one glyph. */
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/* A context is a transient object that is queried/created on */
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/* the fly: client applications never deal with them directly. */
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/* */
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/* */
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/* Glyph objects: */
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/* */
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/* A glyph object contains only the minimal glyph information */
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/* needed to render one glyph correctly. This means that a glyph */
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/* object really contains tables that are sized to hold the */
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/* contents of _any_ glyph of a given face. A client application */
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/* can usually create one glyph object for a given face, then use */
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/* it for all subsequent loads. */
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/* */
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/* Here is an example of a client application : */
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/* (NOTE: No error checking performed here!) */
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/* */
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/* */
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/* TT_Face face; -- face handle */
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/* TT_Instance ins1, ins2; -- two instance handles */
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/* TT_Glyph glyph; -- glyph handle */
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/* */
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/* TT_Init_FreeType(); */
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/* */
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/* -- Initialize the engine. This must be done prior to _any_ */
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/* operation. */
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/* */
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/* TT_Open_Face( "/some/face/name.ttf", &face ); */
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/* */
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/* -- create the face object. This call opens the font file */
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/* */
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/* TT_New_Instance( face, &ins1 ); */
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/* TT_New_Instance( face, &ins2 ); */
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/* */
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/* TT_Set_Instance_PointSize( ins1, 8 ); */
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/* TT_Set_Instance_PointSize( ins2, 12 ); */
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/* */
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/* -- create two distinct instances of the same face */
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/* -- ins1 is pointsize 8 at resolution 96 dpi */
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/* -- ins2 is pointsize 12 at resolution 96 dpi */
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/* */
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/* TT_New_Glyph( face, &glyph ); */
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/* */
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/* -- create a new glyph object which will receive the contents */
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/* of any glyph of 'face' */
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/* */
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/* TT_Load_Glyph( ins1, glyph, 64, DEFAULT_GLYPH_LOAD ); */
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/* */
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/* -- load glyph indexed 64 at pointsize 8 in the 'glyph' object */
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/* -- NOTE: This call will fail if the instance and the glyph */
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/* do not relate to the same face object. */
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/* */
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/* TT_Get_Outline( glyph, &outline ); */
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/* */
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/* -- extract the glyph outline from the object and copies it */
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/* to the 'outline' record */
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/* */
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/* TT_Get_Metrics( glyph, &metrics ); */
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/* */
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/* -- extract the glyph metrics and put them into the 'metrics' */
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/* record */
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/* */
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/* TT_Load_Glyph( ins2, glyph, 64, DEFAULT_GLYPH_LOAD ); */
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/* */
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/* -- load the same glyph at pointsize 12 in the 'glyph' object */
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/* */
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/* */
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/* TT_Close_Face( &face ); */
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/* */
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/* -- destroy the face object. This will destroy 'ins1' and */
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/* 'ins2'. However, the glyph object will still be available */
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/* */
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/* TT_Done_FreeType(); */
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/* */
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/* -- Finalize the engine. This will also destroy all pending */
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/* glyph objects (here 'glyph'). */
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/* */
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/* */
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struct _TFace;
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struct _TInstance;
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struct _TExecution_Context;
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struct _TGlyph;
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#ifndef TFace_defined
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#define TFace_defined
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typedef struct _TFace TFace;
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#endif
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typedef TFace* PFace;
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#ifndef TInstance_defined
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#define TInstance_defined
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typedef struct _TInstance TInstance;
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#endif
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typedef TInstance* PInstance;
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#ifndef TExecution_Context_defined
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#define TExecution_Context_defined
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typedef struct _TExecution_Context TExecution_Context;
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#endif
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typedef TExecution_Context* PExecution_Context;
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typedef struct _TGlyph TGlyph;
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typedef TGlyph* PGlyph;
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/*************************************************************/
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/* */
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/* ADDITIONAL SUBTABLES */
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/* */
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/* These tables are not precisely defined by the specs */
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/* but their structures is implied by the TrueType font */
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/* file layout. */
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/* */
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/*************************************************************/
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/* Graphics State */
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/* */
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/* The Graphics State (GS) is managed by the */
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/* instruction field, but does not come from */
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/* the font file. Thus, we can use 'int's */
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/* where needed. */
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struct _TGraphicsState
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{
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Int rp0;
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Int rp1;
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Int rp2;
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TT_UnitVector dualVector;
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TT_UnitVector projVector;
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TT_UnitVector freeVector;
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Long loop;
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TT_F26Dot6 minimum_distance;
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Int round_state;
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Bool auto_flip;
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TT_F26Dot6 control_value_cutin;
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TT_F26Dot6 single_width_cutin;
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TT_F26Dot6 single_width_value;
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Int delta_base;
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Int delta_shift;
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Byte instruct_control;
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Bool scan_control;
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Int scan_type;
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Int gep0;
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Int gep1;
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Int gep2;
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};
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typedef struct _TGraphicsState TGraphicsState;
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extern const TGraphicsState Default_GraphicsState;
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/*************************************************************/
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/* */
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/* EXECUTION SUBTABLES */
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/* */
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/* These sub-tables relate to instruction execution. */
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/* */
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/*************************************************************/
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# define MAX_CODE_RANGES 3
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/* There can only be 3 active code ranges at once: */
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/* - the Font Program */
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/* - the CVT Program */
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/* - a glyph's instructions set */
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# define TT_CodeRange_Font 1
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# define TT_CodeRange_Cvt 2
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# define TT_CodeRange_Glyph 3
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struct _TCodeRange
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{
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PByte Base;
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Int Size;
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};
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typedef struct _TCodeRange TCodeRange;
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typedef TCodeRange* PCodeRange;
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/* Defintion of a code range */
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/* */
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/* Code ranges can be resident to a glyph (i.e. the Font Program) */
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/* while some others are volatile (Glyph instructions). */
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/* Tracking the state and presence of code ranges allows function */
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/* and instruction definitions within a code range to be forgotten */
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/* when the range is discarded. */
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typedef TCodeRange TCodeRangeTable[MAX_CODE_RANGES];
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/* defines a function/instruction definition record */
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struct _TDefRecord
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{
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Int Range; /* in which code range is it located ? */
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Int Start; /* where does it start ? */
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Byte Opc; /* function #, or instruction code */
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Bool Active; /* is it active ? */
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};
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typedef struct _TDefRecord TDefRecord;
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typedef TDefRecord* PDefRecord;
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typedef TDefRecord* PDefArray;
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/* defines a call record, used to manage function calls. */
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struct _TCallRecord
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{
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Int Caller_Range;
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Int Caller_IP;
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Int Cur_Count;
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Int Cur_Restart;
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};
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typedef struct _TCallRecord TCallRecord;
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typedef TCallRecord* PCallRecord;
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typedef TCallRecord* PCallStack; /* defines a simple call stack */
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/* This type defining a set of glyph points will be used to represent */
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/* each zone (regular and twilight) during instructions decoding. */
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struct _TGlyph_Zone
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{
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int n_points; /* number of points in zone */
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int n_contours; /* number of contours */
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PCoordinates org_x; /* original points coordinates */
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PCoordinates org_y; /* original points coordinates */
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PCoordinates cur_x; /* current points coordinates */
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PCoordinates cur_y; /* current points coordinates */
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Byte* touch; /* current touch flags */
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Short* contours; /* contour end points */
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};
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typedef struct _TGlyph_Zone TGlyph_Zone;
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typedef TGlyph_Zone *PGlyph_Zone;
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#ifndef TT_STATIC_INTERPRETER /* indirect implementation */
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#define EXEC_OPS PExecution_Context exc,
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#define EXEC_OP PExecution_Context exc
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#define EXEC_ARGS exc,
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#define EXEC_ARG exc
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#else /* static implementation */
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#define EXEC_OPS /* void */
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#define EXEC_OP /* void */
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#define EXEC_ARGS /* void */
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#define EXEC_ARG /* void */
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#endif
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/* Rounding function, as used by the interpreter */
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typedef TT_F26Dot6 (*TRound_Function)( EXEC_OPS TT_F26Dot6 distance,
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TT_F26Dot6 compensation );
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/* Point displacement along the freedom vector routine, as */
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/* used by the interpreter */
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typedef void (*TMove_Function)( EXEC_OPS PGlyph_Zone zone,
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Int point,
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TT_F26Dot6 distance );
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/* Distance projection along one of the proj. vectors, as used */
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/* by the interpreter */
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typedef TT_F26Dot6 (*TProject_Function)( EXEC_OPS TT_F26Dot6 Vx,
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TT_F26Dot6 Vy );
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/* reading a cvt value. Take care of non-square pixels when needed */
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typedef TT_F26Dot6 (*TGet_CVT_Function)( EXEC_OPS Int index );
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/* setting or moving a cvt value. Take care of non-square pixels */
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/* when needed */
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typedef void (*TSet_CVT_Function)( EXEC_OPS Int index,
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TT_F26Dot6 value );
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372 |
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373 |
/* subglyph transformation record */
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374 |
struct _TTransform
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{
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TT_Fixed xx, xy; /* transformation */
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|
377 |
TT_Fixed yx, yy; /* matrix */
|
|
|
378 |
TT_F26Dot6 ox, oy; /* offsets */
|
|
|
379 |
};
|
|
|
380 |
|
|
|
381 |
typedef struct _TTransform TTransform;
|
|
|
382 |
typedef TTransform *PTransform;
|
|
|
383 |
|
|
|
384 |
/* subglyph loading record. Used to load composite components */
|
|
|
385 |
struct _TSubglyph_Record
|
|
|
386 |
{
|
|
|
387 |
Int index; /* subglyph index */
|
|
|
388 |
Bool is_scaled; /* is the subglyph scaled? */
|
|
|
389 |
Bool is_hinted; /* should it be hinted? */
|
|
|
390 |
Bool preserve_pps; /* preserve phantom points? */
|
|
|
391 |
|
|
|
392 |
Long file_offset;
|
|
|
393 |
|
|
|
394 |
TT_BBox bbox;
|
|
|
395 |
|
|
|
396 |
TGlyph_Zone zone;
|
|
|
397 |
|
|
|
398 |
Int arg1; /* first argument */
|
|
|
399 |
Int arg2; /* second argument */
|
|
|
400 |
|
|
|
401 |
Int element_flag; /* current load element flag */
|
|
|
402 |
|
|
|
403 |
TTransform transform; /* transform */
|
|
|
404 |
|
|
|
405 |
TT_Vector pp1, pp2; /* phantom points */
|
|
|
406 |
|
|
|
407 |
Int leftBearing; /* in FUnits */
|
|
|
408 |
Int advanceWidth; /* in FUnits */
|
|
|
409 |
};
|
|
|
410 |
|
|
|
411 |
typedef struct _TSubglyph_Record TSubglyph_Record;
|
|
|
412 |
typedef TSubglyph_Record* PSubglyph_Record;
|
|
|
413 |
typedef TSubglyph_Record* PSubglyph_Stack;
|
|
|
414 |
|
|
|
415 |
/* A note regarding non-squared pixels: */
|
|
|
416 |
/* */
|
|
|
417 |
/* (This text will probably go into some docs at some time, for */
|
|
|
418 |
/* now, it is kept there to explain some definitions in the */
|
|
|
419 |
/* TIns_Metrics record). */
|
|
|
420 |
/* */
|
|
|
421 |
/* The CVT is a one-dimensional array containing values that */
|
|
|
422 |
/* control certain important characteristics in a font, like */
|
|
|
423 |
/* the height of all capitals, all lowercase letter, default */
|
|
|
424 |
/* spacing or stem width/height. */
|
|
|
425 |
/* */
|
|
|
426 |
/* These values are found in FUnits in the font file, and must be */
|
|
|
427 |
/* scaled to pixel coordinates before being used by the CVT and */
|
|
|
428 |
/* glyph programs. Unfortunately, when using distinct x and y */
|
|
|
429 |
/* resolutions (or distinct x and y pointsizes), there are two */
|
|
|
430 |
/* possible scalings. */
|
|
|
431 |
/* */
|
|
|
432 |
/* A first try was to implement a 'lazy' scheme where all values */
|
|
|
433 |
/* were scaled when first used. However, while some values are always */
|
|
|
434 |
/* used in the same direction, and some other are used in many */
|
|
|
435 |
/* different circumstances and orientations. */
|
|
|
436 |
/* */
|
|
|
437 |
/* I have found a simpler way to do the same, and it even seems to */
|
|
|
438 |
/* work in most of the cases: */
|
|
|
439 |
/* */
|
|
|
440 |
/* - all CVT values are scaled to the maximum ppem size */
|
|
|
441 |
/* */
|
|
|
442 |
/* - when performing a read or write in the CVT, a ratio factor */
|
|
|
443 |
/* is used to perform adequate scaling. Example: */
|
|
|
444 |
/* */
|
|
|
445 |
/* x_ppem = 14 */
|
|
|
446 |
/* y_ppem = 10 */
|
|
|
447 |
/* */
|
|
|
448 |
/* we choose ppem = x_ppem = 14 as the CVT scaling size. All cvt */
|
|
|
449 |
/* entries are scaled to it. */
|
|
|
450 |
/* */
|
|
|
451 |
/* x_ratio = 1.0 */
|
|
|
452 |
/* y_ratio = y_ppem/ppem (< 1.0) */
|
|
|
453 |
/* */
|
|
|
454 |
/* we compute the current ratio like: */
|
|
|
455 |
/* */
|
|
|
456 |
/* - if projVector is horizontal, */
|
|
|
457 |
/* ratio = x_ratio = 1.0 */
|
|
|
458 |
/* - if projVector is vertical, */
|
|
|
459 |
/* ratop = y_ratio */
|
|
|
460 |
/* - else, */
|
|
|
461 |
/* ratio = sqrt((proj.x*x_ratio)^2 + (proj.y*y_ratio)^2) */
|
|
|
462 |
/* */
|
|
|
463 |
/* reading a cvt value returns ratio * cvt[index] */
|
|
|
464 |
/* writing a cvt value in pixels cvt[index] / ratio */
|
|
|
465 |
/* */
|
|
|
466 |
/* the current ppem is simply ratio * ppem */
|
|
|
467 |
/* */
|
|
|
468 |
|
|
|
469 |
/* metrics used by the instance and execution context objects */
|
|
|
470 |
struct _TIns_Metrics
|
|
|
471 |
{
|
|
|
472 |
TT_F26Dot6 pointSize; /* point size. 1 point = 1/72 inch. */
|
|
|
473 |
|
|
|
474 |
Int x_resolution; /* device horizontal resolution in dpi. */
|
|
|
475 |
Int y_resolution; /* device vertical resolution in dpi. */
|
|
|
476 |
|
|
|
477 |
Int x_ppem; /* horizontal pixels per EM */
|
|
|
478 |
Int y_ppem; /* vertical pixels per EM */
|
|
|
479 |
|
|
|
480 |
Long x_scale1;
|
|
|
481 |
Long x_scale2; /* used to scale FUnits to fractional pixels */
|
|
|
482 |
|
|
|
483 |
Long y_scale1;
|
|
|
484 |
Long y_scale2; /* used to scale FUnits to fractional pixels */
|
|
|
485 |
|
|
|
486 |
/* for non-square pixels */
|
|
|
487 |
Long x_ratio;
|
|
|
488 |
Long y_ratio;
|
|
|
489 |
|
|
|
490 |
Int ppem; /* maximum ppem size */
|
|
|
491 |
Long ratio; /* current ratio */
|
|
|
492 |
Long scale1;
|
|
|
493 |
Long scale2; /* scale for ppem */
|
|
|
494 |
|
|
|
495 |
TT_F26Dot6 compensations[4]; /* device-specific compensations */
|
|
|
496 |
|
|
|
497 |
Bool rotated; /* `is the glyph rotated?'-flag */
|
|
|
498 |
Bool stretched; /* `is the glyph stretched?'-flag */
|
|
|
499 |
};
|
|
|
500 |
|
|
|
501 |
typedef struct _TIns_Metrics TIns_Metrics;
|
|
|
502 |
typedef TIns_Metrics *PIns_Metrics;
|
|
|
503 |
|
|
|
504 |
|
|
|
505 |
|
|
|
506 |
/***********************************************************************/
|
|
|
507 |
/* */
|
|
|
508 |
/* FreeType Face Type */
|
|
|
509 |
/* */
|
|
|
510 |
/***********************************************************************/
|
|
|
511 |
|
|
|
512 |
struct _TFace
|
|
|
513 |
{
|
|
|
514 |
ttfReader *r;
|
|
|
515 |
ttfFont *font;
|
|
|
516 |
|
|
|
517 |
/* maximum profile table, as found in the TrueType file */
|
|
|
518 |
TMaxProfile maxProfile;
|
|
|
519 |
|
|
|
520 |
/* Note: */
|
|
|
521 |
/* it seems that some maximum values cannot be */
|
|
|
522 |
/* taken directly from this table, but rather by */
|
|
|
523 |
/* combining some of its fields; e.g. the max. */
|
|
|
524 |
/* number of points seems to be given by */
|
|
|
525 |
/* MAX( maxPoints, maxCompositePoints ) */
|
|
|
526 |
/* */
|
|
|
527 |
/* For this reason, we define later our own */
|
|
|
528 |
/* max values that are used to load and allocate */
|
|
|
529 |
/* further tables. */
|
|
|
530 |
|
|
|
531 |
/* The glyph locations table */
|
|
|
532 |
Int numLocations;
|
|
|
533 |
|
|
|
534 |
/* The HMTX table data, used to compute both left */
|
|
|
535 |
/* side bearing and advance width for all glyphs */
|
|
|
536 |
|
|
|
537 |
/* the font program, if any */
|
|
|
538 |
Int fontPgmSize;
|
|
|
539 |
PByte fontProgram;
|
|
|
540 |
|
|
|
541 |
/* the cvt program, if any */
|
|
|
542 |
Int cvtPgmSize;
|
|
|
543 |
PByte cvtProgram;
|
|
|
544 |
|
|
|
545 |
/* the original, unscaled, control value table */
|
|
|
546 |
Int cvtSize;
|
|
|
547 |
PShort cvt;
|
|
|
548 |
|
|
|
549 |
/* The following values _must_ be set by the */
|
|
|
550 |
/* maximum profile loader */
|
|
|
551 |
|
|
|
552 |
Int numGlyphs; /* the face's total number of glyphs */
|
|
|
553 |
Int maxPoints; /* max glyph points number, simple and composite */
|
|
|
554 |
Int maxContours; /* max glyph contours number, simple and composite */
|
|
|
555 |
Int maxComponents; /* max components in a composite glyph */
|
|
|
556 |
|
|
|
557 |
};
|
|
|
558 |
|
|
|
559 |
|
|
|
560 |
|
|
|
561 |
/***********************************************************************/
|
|
|
562 |
/* */
|
|
|
563 |
/* FreeType Instance Type */
|
|
|
564 |
/* */
|
|
|
565 |
/***********************************************************************/
|
|
|
566 |
|
|
|
567 |
struct _TInstance
|
|
|
568 |
{
|
|
|
569 |
PFace face; /* face object */
|
|
|
570 |
|
|
|
571 |
Bool valid;
|
|
|
572 |
|
|
|
573 |
TIns_Metrics metrics;
|
|
|
574 |
|
|
|
575 |
Int numFDefs; /* number of function definitions */
|
|
|
576 |
PDefArray FDefs; /* table of FDefs entries */
|
|
|
577 |
|
|
|
578 |
Int numIDefs; /* number of instruction definitions */
|
|
|
579 |
PDefArray IDefs; /* table of IDefs entries */
|
|
|
580 |
Int countIDefs;/* The number of defined IDefs (igorm). */
|
|
|
581 |
Byte IDefPtr[256]; /* Map opcodes to indices of IDefs (igorm). */
|
|
|
582 |
|
|
|
583 |
TCodeRangeTable codeRangeTable;
|
|
|
584 |
|
|
|
585 |
TGraphicsState GS;
|
|
|
586 |
TGraphicsState default_GS;
|
|
|
587 |
|
|
|
588 |
Int cvtSize; /* the scaled control value table */
|
|
|
589 |
PLong cvt;
|
|
|
590 |
|
|
|
591 |
Int storeSize; /* The storage area is now part of the */
|
|
|
592 |
PStorage storage; /* instance */
|
|
|
593 |
|
|
|
594 |
};
|
|
|
595 |
|
|
|
596 |
|
|
|
597 |
/***********************************************************************/
|
|
|
598 |
/* */
|
|
|
599 |
/* FreeType Execution Context Type */
|
|
|
600 |
/* */
|
|
|
601 |
/***********************************************************************/
|
|
|
602 |
|
|
|
603 |
struct _TExecution_Context
|
|
|
604 |
{
|
|
|
605 |
PFace current_face;
|
|
|
606 |
|
|
|
607 |
/* instructions state */
|
|
|
608 |
|
|
|
609 |
Int error; /* last execution error */
|
|
|
610 |
|
|
|
611 |
Int curRange; /* current code range number */
|
|
|
612 |
PByte code; /* current code range */
|
|
|
613 |
Int IP; /* current instruction pointer */
|
|
|
614 |
Int codeSize; /* size of current range */
|
|
|
615 |
|
|
|
616 |
Byte opcode; /* current opcode */
|
|
|
617 |
Int length; /* length of current opcode */
|
|
|
618 |
|
|
|
619 |
Bool step_ins; /* true if the interpreter must */
|
|
|
620 |
/* increment IP after ins. exec */
|
|
|
621 |
|
|
|
622 |
Int numFDefs; /* number of function defs */
|
|
|
623 |
PDefRecord FDefs; /* table of FDefs entries */
|
|
|
624 |
|
|
|
625 |
Int numIDefs; /* number of instruction defs */
|
|
|
626 |
PDefRecord IDefs; /* table of IDefs entries */
|
|
|
627 |
Int countIDefs;/* The number of defined IDefs (igorm). */
|
|
|
628 |
Byte IDefPtr[256]; /* Map opcodes to indices of IDefs (igorm). */
|
|
|
629 |
|
|
|
630 |
PByte glyphIns; /* glyph instructions buffer */
|
|
|
631 |
Int glyphSize; /* glyph instructions buffer size */
|
|
|
632 |
|
|
|
633 |
Int callTop, /* top of call stack during execution */
|
|
|
634 |
callSize; /* size of call stack */
|
|
|
635 |
PCallStack callStack; /* call stack */
|
|
|
636 |
|
|
|
637 |
TCodeRangeTable codeRangeTable; /* table of valid coderanges */
|
|
|
638 |
/* useful for the debugger */
|
|
|
639 |
|
|
|
640 |
Int storeSize; /* size of current storage */
|
|
|
641 |
PStorage storage; /* storage area */
|
|
|
642 |
|
|
|
643 |
Int stackSize; /* size of exec. stack */
|
|
|
644 |
Int top; /* top of exec. stack */
|
|
|
645 |
PStorage stack; /* current exec. stack */
|
|
|
646 |
|
|
|
647 |
Int args,
|
|
|
648 |
new_top; /* new top after exec. */
|
|
|
649 |
|
|
|
650 |
TT_F26Dot6 period; /* values used for the */
|
|
|
651 |
TT_F26Dot6 phase; /* 'SuperRounding' */
|
|
|
652 |
TT_F26Dot6 threshold;
|
|
|
653 |
|
|
|
654 |
TIns_Metrics metrics; /* instance metrics */
|
|
|
655 |
|
|
|
656 |
Int cur_ppem; /* ppem along the current proj vector */
|
|
|
657 |
Long scale1; /* scaling values along the current */
|
|
|
658 |
Long scale2; /* projection vector too.. */
|
|
|
659 |
Bool cached_metrics; /* the ppem is computed lazily. used */
|
|
|
660 |
/* to trigger computation when needed */
|
|
|
661 |
|
|
|
662 |
TGlyph_Zone zp0, /* zone records */
|
|
|
663 |
zp1,
|
|
|
664 |
zp2,
|
|
|
665 |
pts,
|
|
|
666 |
twilight;
|
|
|
667 |
|
|
|
668 |
Bool instruction_trap; /* If True, the interpreter will */
|
|
|
669 |
/* exit after each instruction */
|
|
|
670 |
|
|
|
671 |
TGraphicsState GS; /* current graphics state */
|
|
|
672 |
|
|
|
673 |
TGraphicsState default_GS; /* graphics state resulting from */
|
|
|
674 |
/* the prep program */
|
|
|
675 |
Bool is_composite; /* ture if the glyph is composite */
|
|
|
676 |
|
|
|
677 |
Int cvtSize;
|
|
|
678 |
PLong cvt;
|
|
|
679 |
|
|
|
680 |
/* latest interpreter additions */
|
|
|
681 |
|
|
|
682 |
Long F_dot_P; /* dot product of freedom and projection */
|
|
|
683 |
/* vectors */
|
|
|
684 |
TRound_Function func_round; /* current rounding function */
|
|
|
685 |
|
|
|
686 |
TProject_Function func_project, /* current projection function */
|
|
|
687 |
func_dualproj, /* current dual proj. function */
|
|
|
688 |
func_freeProj; /* current freedom proj. func */
|
|
|
689 |
|
|
|
690 |
TMove_Function func_move; /* current point move function */
|
|
|
691 |
|
|
|
692 |
TGet_CVT_Function func_read_cvt; /* read a cvt entry */
|
|
|
693 |
TSet_CVT_Function func_write_cvt; /* write a cvt entry (in pixels) */
|
|
|
694 |
TSet_CVT_Function func_move_cvt; /* incr a cvt entry (in pixels) */
|
|
|
695 |
/* GS extension */
|
|
|
696 |
jmp_buf trap; /* Error throw trap. */
|
|
|
697 |
Int n_contours;
|
|
|
698 |
Int n_points;
|
|
|
699 |
Int maxGlyphSize;
|
|
|
700 |
Int lock;
|
|
|
701 |
};
|
|
|
702 |
|
|
|
703 |
|
|
|
704 |
/********************************************************************/
|
|
|
705 |
/* */
|
|
|
706 |
/* Code Range Functions */
|
|
|
707 |
/* */
|
|
|
708 |
/********************************************************************/
|
|
|
709 |
|
|
|
710 |
/* Goto a specified coderange */
|
|
|
711 |
TT_Error Goto_CodeRange( PExecution_Context exec, Int range, Int IP );
|
|
|
712 |
/* Unset the coderange */
|
|
|
713 |
void Unset_CodeRange( PExecution_Context exec );
|
|
|
714 |
|
|
|
715 |
/* Return a pointer to a given coderange record. */
|
|
|
716 |
/* Used only by the debugger. */
|
|
|
717 |
PCodeRange Get_CodeRange( PExecution_Context exec, Int range );
|
|
|
718 |
|
|
|
719 |
/* Set a given code range properties */
|
|
|
720 |
TT_Error Set_CodeRange( PExecution_Context exec,
|
|
|
721 |
Int range,
|
|
|
722 |
void* base,
|
|
|
723 |
Int length );
|
|
|
724 |
|
|
|
725 |
/* Clear a given coderange */
|
|
|
726 |
TT_Error Clear_CodeRange( PExecution_Context exec, Int range );
|
|
|
727 |
|
|
|
728 |
|
|
|
729 |
PExecution_Context New_Context( PFace face );
|
|
|
730 |
|
|
|
731 |
TT_Error Done_Context( PExecution_Context exec );
|
|
|
732 |
|
|
|
733 |
|
|
|
734 |
TT_Error Context_Load( PExecution_Context exec,
|
|
|
735 |
PInstance ins );
|
|
|
736 |
|
|
|
737 |
TT_Error Context_Save( PExecution_Context exec,
|
|
|
738 |
PInstance ins );
|
|
|
739 |
|
|
|
740 |
TT_Error Context_Run( PExecution_Context exec,
|
|
|
741 |
Bool debug );
|
|
|
742 |
|
|
|
743 |
TT_Error Instance_Init( PInstance ins );
|
|
|
744 |
|
|
|
745 |
TT_Error Instance_Reset( PInstance ins,
|
|
|
746 |
Bool debug );
|
|
|
747 |
|
|
|
748 |
TT_Error Instance_Create( void* _instance,
|
|
|
749 |
void* _face );
|
|
|
750 |
|
|
|
751 |
TT_Error Instance_Destroy( void* _instance );
|
|
|
752 |
|
|
|
753 |
TT_Error Context_Destroy( void* _context );
|
|
|
754 |
|
|
|
755 |
TT_Error Context_Create( void* _context, void* _face );
|
|
|
756 |
|
|
|
757 |
/********************************************************************/
|
|
|
758 |
/* */
|
|
|
759 |
/* Handy scaling functions */
|
|
|
760 |
/* */
|
|
|
761 |
/********************************************************************/
|
|
|
762 |
|
|
|
763 |
TT_Pos Scale_X( PIns_Metrics metrics, TT_Pos x );
|
|
|
764 |
TT_Pos Scale_Y( PIns_Metrics metrics, TT_Pos y );
|
|
|
765 |
|
|
|
766 |
/********************************************************************/
|
|
|
767 |
/* */
|
|
|
768 |
/* Component Initializer/Finalizer */
|
|
|
769 |
/* */
|
|
|
770 |
/* Called from 'freetype.c' */
|
|
|
771 |
/* The component must create and register the face, instance and */
|
|
|
772 |
/* execution context cache classes before any object can be */
|
|
|
773 |
/* managed. */
|
|
|
774 |
/* */
|
|
|
775 |
/********************************************************************/
|
|
|
776 |
|
|
|
777 |
TT_Error Face_Create( PFace _face);
|
|
|
778 |
TT_Error Face_Destroy( PFace _face);
|
|
|
779 |
|
|
|
780 |
#ifdef __cplusplus
|
|
|
781 |
}
|
|
|
782 |
#endif
|
|
|
783 |
|
|
|
784 |
#endif /* TTOBJS_H */
|
|
|
785 |
|
|
|
786 |
|
|
|
787 |
/* END */
|