2015-12-10 05:06:13 +02:00
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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/***************************************************************************/
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/* */
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/* ftimage.h */
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/* */
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/* FreeType glyph image formats and default raster interface */
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/* (specification). */
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/* */
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/* Copyright 1996-2001, 2002, 2003, 2004 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 __QT_FTIMAGE_H__
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#define __QT_FTIMAGE_H__
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/*
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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*/
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QT_FT_BEGIN_HEADER
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/*************************************************************************/
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/* */
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/* <Section> */
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/* basic_types */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Type> */
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/* QT_FT_Pos */
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/* */
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/* <Description> */
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/* The type QT_FT_Pos is a 32-bit integer used to store vectorial */
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/* coordinates. Depending on the context, these can represent */
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/* distances in integer font units, or 16,16, or 26.6 fixed float */
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/* pixel coordinates. */
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/* */
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typedef signed int QT_FT_Pos;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* QT_FT_Vector */
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/* */
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/* <Description> */
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/* A simple structure used to store a 2D vector; coordinates are of */
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/* the QT_FT_Pos type. */
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/* */
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/* <Fields> */
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/* x :: The horizontal coordinate. */
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/* y :: The vertical coordinate. */
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/* */
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typedef struct QT_FT_Vector_
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{
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QT_FT_Pos x;
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QT_FT_Pos y;
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} QT_FT_Vector;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* QT_FT_BBox */
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/* */
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/* <Description> */
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/* A structure used to hold an outline's bounding box, i.e., the */
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/* coordinates of its extrema in the horizontal and vertical */
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/* directions. */
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/* */
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/* <Fields> */
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/* xMin :: The horizontal minimum (left-most). */
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/* */
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/* yMin :: The vertical minimum (bottom-most). */
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/* */
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/* xMax :: The horizontal maximum (right-most). */
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/* */
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/* yMax :: The vertical maximum (top-most). */
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/* */
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typedef struct QT_FT_BBox_
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{
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QT_FT_Pos xMin, yMin;
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QT_FT_Pos xMax, yMax;
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} QT_FT_BBox;
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/*************************************************************************/
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/* */
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/* <Enum> */
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/* QT_FT_Pixel_Mode */
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/* */
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/* <Description> */
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/* An enumeration type used to describe the format of pixels in a */
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/* given bitmap. Note that additional formats may be added in the */
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/* future. */
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/* */
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/* <Values> */
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/* QT_FT_PIXEL_MODE_NONE :: */
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/* Value 0 is reserved. */
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/* */
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/* QT_FT_PIXEL_MODE_MONO :: */
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/* A monochrome bitmap, using 1 bit per pixel. Note that pixels */
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/* are stored in most-significant order (MSB), which means that */
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/* the left-most pixel in a byte has value 128. */
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/* */
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/* QT_FT_PIXEL_MODE_GRAY :: */
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/* An 8-bit bitmap, generally used to represent anti-aliased glyph */
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/* images. Each pixel is stored in one byte. Note that the number */
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/* of value "gray" levels is stored in the `num_bytes' field of */
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/* the @QT_FT_Bitmap structure (it generally is 256). */
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/* */
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/* QT_FT_PIXEL_MODE_GRAY2 :: */
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/* A 2-bit/pixel bitmap, used to represent embedded anti-aliased */
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/* bitmaps in font files according to the OpenType specification. */
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/* We haven't found a single font using this format, however. */
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/* */
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/* QT_FT_PIXEL_MODE_GRAY4 :: */
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/* A 4-bit/pixel bitmap, used to represent embedded anti-aliased */
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/* bitmaps in font files according to the OpenType specification. */
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/* We haven't found a single font using this format, however. */
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/* */
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/* QT_FT_PIXEL_MODE_LCD :: */
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/* An 8-bit bitmap, used to represent RGB or BGR decimated glyph */
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/* images used for display on LCD displays; the bitmap's width is */
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/* three times wider than the original glyph image. See also */
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/* @QT_FT_RENDER_MODE_LCD. */
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/* */
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/* QT_FT_PIXEL_MODE_LCD_V :: */
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/* An 8-bit bitmap, used to represent RGB or BGR decimated glyph */
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/* images used for display on rotated LCD displays; the bitmap's */
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/* height is three times taller than the original glyph image. */
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/* See also @QT_FT_RENDER_MODE_LCD_V. */
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/* */
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typedef enum QT_FT_Pixel_Mode_
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{
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QT_FT_PIXEL_MODE_NONE = 0,
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QT_FT_PIXEL_MODE_MONO,
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QT_FT_PIXEL_MODE_GRAY,
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QT_FT_PIXEL_MODE_GRAY2,
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QT_FT_PIXEL_MODE_GRAY4,
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QT_FT_PIXEL_MODE_LCD,
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QT_FT_PIXEL_MODE_LCD_V,
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QT_FT_PIXEL_MODE_MAX /* do not remove */
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} QT_FT_Pixel_Mode;
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/*************************************************************************/
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/* */
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/* <Section> */
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/* outline_processing */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* QT_FT_Outline */
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/* */
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/* <Description> */
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/* This structure is used to describe an outline to the scan-line */
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/* converter. */
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/* */
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/* <Fields> */
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/* n_contours :: The number of contours in the outline. */
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/* */
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/* n_points :: The number of points in the outline. */
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/* */
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/* points :: A pointer to an array of `n_points' QT_FT_Vector */
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/* elements, giving the outline's point coordinates. */
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/* */
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/* tags :: A pointer to an array of `n_points' chars, giving */
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/* each outline point's type. If bit 0 is unset, the */
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/* point is `off' the curve, i.e. a Bezier control */
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/* point, while it is `on' when set. */
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/* */
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/* Bit 1 is meaningful for `off' points only. If set, */
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/* it indicates a third-order Bezier arc control point; */
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/* and a second-order control point if unset. */
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/* */
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/* contours :: An array of `n_contours' shorts, giving the end */
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/* point of each contour within the outline. For */
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/* example, the first contour is defined by the points */
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/* `0' to `contours[0]', the second one is defined by */
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/* the points `contours[0]+1' to `contours[1]', etc. */
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/* */
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/* flags :: A set of bit flags used to characterize the outline */
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/* and give hints to the scan-converter and hinter on */
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/* how to convert/grid-fit it. See QT_FT_Outline_Flags. */
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/* */
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typedef struct QT_FT_Outline_
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{
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int n_contours; /* number of contours in glyph */
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int n_points; /* number of points in the glyph */
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QT_FT_Vector* points; /* the outline's points */
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char* tags; /* the points flags */
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int* contours; /* the contour end points */
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int flags; /* outline masks */
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} QT_FT_Outline;
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/*************************************************************************/
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/* */
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/* <Enum> */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_FLAGS */
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2015-12-10 05:06:13 +02:00
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/* */
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/* <Description> */
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/* A list of bit-field constants use for the flags in an outline's */
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/* `flags' field. */
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/* */
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/* <Values> */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_NONE :: Value 0 is reserved. */
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2015-12-10 05:06:13 +02:00
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/* */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_OWNER :: If set, this flag indicates that the */
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2015-12-10 05:06:13 +02:00
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/* outline's field arrays (i.e. */
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/* `points', `flags' & `contours') are */
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/* `owned' by the outline object, and */
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/* should thus be freed when it is */
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/* destroyed. */
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/* */
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/* QT_FT_OUTLINE_EVEN_ODD_FILL :: By default, outlines are filled using */
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/* the non-zero winding rule. If set to */
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/* 1, the outline will be filled using */
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/* the even-odd fill rule (only works */
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/* with the smooth raster). */
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/* */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_REVERSE_FILL :: By default, outside contours of an */
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2015-12-10 05:06:13 +02:00
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/* outline are oriented in clock-wise */
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/* direction, as defined in the TrueType */
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/* specification. This flag is set if */
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/* the outline uses the opposite */
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/* direction (typically for Type 1 */
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/* fonts). This flag is ignored by the */
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/* scan-converter. However, it is very */
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/* important for the auto-hinter. */
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/* */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_IGNORE_DROPOUTS :: By default, the scan converter will */
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2015-12-10 05:06:13 +02:00
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/* try to detect drop-outs in an outline */
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/* and correct the glyph bitmap to */
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/* ensure consistent shape continuity. */
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/* If set, this flag hints the scan-line */
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/* converter to ignore such cases. */
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/* */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_HIGH_PRECISION :: This flag indicates that the */
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2015-12-10 05:06:13 +02:00
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/* scan-line converter should try to */
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/* convert this outline to bitmaps with */
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/* the highest possible quality. It is */
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/* typically set for small character */
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/* sizes. Note that this is only a */
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/* hint, that might be completely */
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/* ignored by a given scan-converter. */
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/* */
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2016-06-28 13:49:11 +00:00
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/* QT_FT_OUTLINE_SINGLE_PASS :: This flag is set to force a given */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* scan-converter to only use a single */
|
|
|
|
|
/* pass over the outline to render a */
|
|
|
|
|
/* bitmap glyph image. Normally, it is */
|
|
|
|
|
/* set for very large character sizes. */
|
|
|
|
|
/* It is only a hint, that might be */
|
|
|
|
|
/* completely ignored by a given */
|
|
|
|
|
/* scan-converter. */
|
|
|
|
|
/* */
|
|
|
|
|
#define QT_FT_OUTLINE_NONE 0x0
|
|
|
|
|
#define QT_FT_OUTLINE_OWNER 0x1
|
|
|
|
|
#define QT_FT_OUTLINE_EVEN_ODD_FILL 0x2
|
|
|
|
|
#define QT_FT_OUTLINE_REVERSE_FILL 0x4
|
|
|
|
|
#define QT_FT_OUTLINE_IGNORE_DROPOUTS 0x8
|
|
|
|
|
|
|
|
|
|
#define QT_FT_OUTLINE_HIGH_PRECISION 0x100
|
|
|
|
|
#define QT_FT_OUTLINE_SINGLE_PASS 0x200
|
|
|
|
|
|
|
|
|
|
/* */
|
|
|
|
|
|
|
|
|
|
#define QT_FT_CURVE_TAG( flag ) ( flag & 3 )
|
|
|
|
|
|
|
|
|
|
#define QT_FT_CURVE_TAG_ON 1
|
|
|
|
|
#define QT_FT_CURVE_TAG_CUBIC 2
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Curve_Tag_On QT_FT_CURVE_TAG_ON
|
|
|
|
|
#define QT_FT_Curve_Tag_Cubic QT_FT_CURVE_TAG_CUBIC
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Outline_MoveToFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A function pointer type used to describe the signature of a `move */
|
|
|
|
|
/* to' function during outline walking/decomposition. */
|
|
|
|
|
/* */
|
|
|
|
|
/* A `move to' is emitted to start a new contour in an outline. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* to :: A pointer to the target point of the `move to'. */
|
|
|
|
|
/* */
|
|
|
|
|
/* user :: A typeless pointer which is passed from the caller of the */
|
|
|
|
|
/* decomposition function. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Return> */
|
|
|
|
|
/* Error code. 0 means success. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef int
|
|
|
|
|
(*QT_FT_Outline_MoveToFunc)( QT_FT_Vector* to,
|
|
|
|
|
void* user );
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Outline_MoveTo_Func QT_FT_Outline_MoveToFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Outline_LineToFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A function pointer type used to describe the signature of a `line */
|
|
|
|
|
/* to' function during outline walking/decomposition. */
|
|
|
|
|
/* */
|
|
|
|
|
/* A `line to' is emitted to indicate a segment in the outline. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* to :: A pointer to the target point of the `line to'. */
|
|
|
|
|
/* */
|
|
|
|
|
/* user :: A typeless pointer which is passed from the caller of the */
|
|
|
|
|
/* decomposition function. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Return> */
|
|
|
|
|
/* Error code. 0 means success. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef int
|
|
|
|
|
(*QT_FT_Outline_LineToFunc)( QT_FT_Vector* to,
|
|
|
|
|
void* user );
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Outline_LineTo_Func QT_FT_Outline_LineToFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Outline_ConicToFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A function pointer type use to describe the signature of a `conic */
|
|
|
|
|
/* to' function during outline walking/decomposition. */
|
|
|
|
|
/* */
|
|
|
|
|
/* A `conic to' is emitted to indicate a second-order Bezier arc in */
|
|
|
|
|
/* the outline. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* control :: An intermediate control point between the last position */
|
|
|
|
|
/* and the new target in `to'. */
|
|
|
|
|
/* */
|
|
|
|
|
/* to :: A pointer to the target end point of the conic arc. */
|
|
|
|
|
/* */
|
|
|
|
|
/* user :: A typeless pointer which is passed from the caller of */
|
|
|
|
|
/* the decomposition function. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Return> */
|
|
|
|
|
/* Error code. 0 means success. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef int
|
|
|
|
|
(*QT_FT_Outline_ConicToFunc)( QT_FT_Vector* control,
|
|
|
|
|
QT_FT_Vector* to,
|
|
|
|
|
void* user );
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Outline_ConicTo_Func QT_FT_Outline_ConicToFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Outline_CubicToFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A function pointer type used to describe the signature of a `cubic */
|
|
|
|
|
/* to' function during outline walking/decomposition. */
|
|
|
|
|
/* */
|
|
|
|
|
/* A `cubic to' is emitted to indicate a third-order Bezier arc. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* control1 :: A pointer to the first Bezier control point. */
|
|
|
|
|
/* */
|
|
|
|
|
/* control2 :: A pointer to the second Bezier control point. */
|
|
|
|
|
/* */
|
|
|
|
|
/* to :: A pointer to the target end point. */
|
|
|
|
|
/* */
|
|
|
|
|
/* user :: A typeless pointer which is passed from the caller of */
|
|
|
|
|
/* the decomposition function. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Return> */
|
|
|
|
|
/* Error code. 0 means success. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef int
|
|
|
|
|
(*QT_FT_Outline_CubicToFunc)( QT_FT_Vector* control1,
|
|
|
|
|
QT_FT_Vector* control2,
|
|
|
|
|
QT_FT_Vector* to,
|
|
|
|
|
void* user );
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Outline_CubicTo_Func QT_FT_Outline_CubicToFunc
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Struct> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Outline_Funcs */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A structure to hold various function pointers used during outline */
|
|
|
|
|
/* decomposition in order to emit segments, conic, and cubic Beziers, */
|
|
|
|
|
/* as well as `move to' and `close to' operations. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Fields> */
|
|
|
|
|
/* move_to :: The `move to' emitter. */
|
|
|
|
|
/* */
|
|
|
|
|
/* line_to :: The segment emitter. */
|
|
|
|
|
/* */
|
|
|
|
|
/* conic_to :: The second-order Bezier arc emitter. */
|
|
|
|
|
/* */
|
|
|
|
|
/* cubic_to :: The third-order Bezier arc emitter. */
|
|
|
|
|
/* */
|
|
|
|
|
/* shift :: The shift that is applied to coordinates before they */
|
|
|
|
|
/* are sent to the emitter. */
|
|
|
|
|
/* */
|
|
|
|
|
/* delta :: The delta that is applied to coordinates before they */
|
|
|
|
|
/* are sent to the emitter, but after the shift. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* The point coordinates sent to the emitters are the transformed */
|
|
|
|
|
/* version of the original coordinates (this is important for high */
|
|
|
|
|
/* accuracy during scan-conversion). The transformation is simple: */
|
|
|
|
|
/* */
|
|
|
|
|
/* x' = (x << shift) - delta */
|
|
|
|
|
/* y' = (x << shift) - delta */
|
|
|
|
|
/* */
|
|
|
|
|
/* Set the value of `shift' and `delta' to 0 to get the original */
|
|
|
|
|
/* point coordinates. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef struct QT_FT_Outline_Funcs_
|
|
|
|
|
{
|
|
|
|
|
QT_FT_Outline_MoveToFunc move_to;
|
|
|
|
|
QT_FT_Outline_LineToFunc line_to;
|
|
|
|
|
QT_FT_Outline_ConicToFunc conic_to;
|
|
|
|
|
QT_FT_Outline_CubicToFunc cubic_to;
|
|
|
|
|
|
|
|
|
|
int shift;
|
|
|
|
|
QT_FT_Pos delta;
|
|
|
|
|
|
|
|
|
|
} QT_FT_Outline_Funcs;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Section> */
|
|
|
|
|
/* basic_types */
|
|
|
|
|
/* */
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Macro> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_IMAGE_TAG */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* This macro converts four letter tags into an unsigned long. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* Since many 16bit compilers don't like 32bit enumerations, you */
|
|
|
|
|
/* should redefine this macro in case of problems to something like */
|
|
|
|
|
/* this: */
|
|
|
|
|
/* */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* #define QT_FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) value */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* to get a simple enumeration without assigning special numbers. */
|
|
|
|
|
/* */
|
|
|
|
|
#ifndef QT_FT_IMAGE_TAG
|
|
|
|
|
#define QT_FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) \
|
|
|
|
|
value = ( ( (unsigned long)_x1 << 24 ) | \
|
|
|
|
|
( (unsigned long)_x2 << 16 ) | \
|
|
|
|
|
( (unsigned long)_x3 << 8 ) | \
|
|
|
|
|
(unsigned long)_x4 )
|
|
|
|
|
#endif /* QT_FT_IMAGE_TAG */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Enum> */
|
|
|
|
|
/* QT_FT_Glyph_Format */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* An enumeration type used to describe the format of a given glyph */
|
|
|
|
|
/* image. Note that this version of FreeType only supports two image */
|
|
|
|
|
/* formats, even though future font drivers will be able to register */
|
|
|
|
|
/* their own format. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Values> */
|
|
|
|
|
/* QT_FT_GLYPH_FORMAT_NONE :: */
|
|
|
|
|
/* The value 0 is reserved and does describe a glyph format. */
|
|
|
|
|
/* */
|
|
|
|
|
/* QT_FT_GLYPH_FORMAT_COMPOSITE :: */
|
|
|
|
|
/* The glyph image is a composite of several other images. This */
|
|
|
|
|
/* format is _only_ used with @QT_FT_LOAD_NO_RECURSE, and is used to */
|
|
|
|
|
/* report compound glyphs (like accented characters). */
|
|
|
|
|
/* */
|
|
|
|
|
/* QT_FT_GLYPH_FORMAT_OUTLINE :: */
|
|
|
|
|
/* The glyph image is a vertorial outline made of line segments */
|
|
|
|
|
/* and Bezier arcs; it can be described as an @QT_FT_Outline; you */
|
|
|
|
|
/* generally want to access the `outline' field of the */
|
|
|
|
|
/* @QT_FT_GlyphSlotRec structure to read it. */
|
|
|
|
|
/* */
|
|
|
|
|
/* QT_FT_GLYPH_FORMAT_PLOTTER :: */
|
|
|
|
|
/* The glyph image is a vectorial path with no inside/outside */
|
|
|
|
|
/* contours. Some Type 1 fonts, like those in the Hershey family, */
|
|
|
|
|
/* contain glyphs in this format. These are described as */
|
|
|
|
|
/* @QT_FT_Outline, but FreeType isn't currently capable of rendering */
|
|
|
|
|
/* them correctly. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef enum QT_FT_Glyph_Format_
|
|
|
|
|
{
|
|
|
|
|
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_NONE, 0, 0, 0, 0 ),
|
|
|
|
|
|
|
|
|
|
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_COMPOSITE, 'c', 'o', 'm', 'p' ),
|
|
|
|
|
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_OUTLINE, 'o', 'u', 't', 'l' ),
|
|
|
|
|
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_PLOTTER, 'p', 'l', 'o', 't' )
|
|
|
|
|
|
|
|
|
|
} QT_FT_Glyph_Format;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Enum> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* qt_ft_glyph_format_xxx */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A list of decprecated constants. Use the corresponding */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* @QT_FT_Glyph_Format values instead. */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Values> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* qt_ft_glyph_format_none :: see @QT_FT_GLYPH_FORMAT_NONE */
|
|
|
|
|
/* qt_ft_glyph_format_composite :: see @QT_FT_GLYPH_FORMAT_COMPOSITE */
|
|
|
|
|
/* qt_ft_glyph_format_outline :: see @QT_FT_GLYPH_FORMAT_OUTLINE */
|
|
|
|
|
/* qt_ft_glyph_format_plotter :: see @QT_FT_GLYPH_FORMAT_PLOTTER */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
#define qt_ft_glyph_format_none QT_FT_GLYPH_FORMAT_NONE
|
|
|
|
|
#define qt_ft_glyph_format_composite QT_FT_GLYPH_FORMAT_COMPOSITE
|
|
|
|
|
#define qt_ft_glyph_format_outline QT_FT_GLYPH_FORMAT_OUTLINE
|
|
|
|
|
#define qt_ft_glyph_format_plotter QT_FT_GLYPH_FORMAT_PLOTTER
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/***** *****/
|
|
|
|
|
/***** R A S T E R D E F I N I T I O N S *****/
|
|
|
|
|
/***** *****/
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* A raster is a scan converter, in charge of rendering an outline into */
|
|
|
|
|
/* a a bitmap. This section contains the public API for rasters. */
|
|
|
|
|
/* */
|
|
|
|
|
/* Note that in FreeType 2, all rasters are now encapsulated within */
|
|
|
|
|
/* specific modules called `renderers'. See `freetype/ftrender.h' for */
|
|
|
|
|
/* more details on renderers. */
|
|
|
|
|
/* */
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Section> */
|
|
|
|
|
/* raster */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Title> */
|
|
|
|
|
/* Scanline converter */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Abstract> */
|
|
|
|
|
/* How vectorial outlines are converted into bitmaps and pixmaps. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* This section contains technical definitions. */
|
|
|
|
|
/* */
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Type> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Raster */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A handle (pointer) to a raster object. Each object can be used */
|
|
|
|
|
/* independently to convert an outline into a bitmap or pixmap. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef struct TRaster_ *QT_FT_Raster;
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Struct> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Span */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A structure used to model a single span of gray (or black) pixels */
|
|
|
|
|
/* when rendering a monochrome or anti-aliased bitmap. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Fields> */
|
|
|
|
|
/* x :: The span's horizontal start position. */
|
|
|
|
|
/* */
|
|
|
|
|
/* len :: The span's length in pixels. */
|
|
|
|
|
/* */
|
|
|
|
|
/* coverage :: The span color/coverage, ranging from 0 (background) */
|
|
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|
|
/* to 255 (foreground). Only used for anti-aliased */
|
|
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|
|
/* rendering. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* This structure is used by the span drawing callback type named */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_SpanFunc which takes the y-coordinate of the span as a */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* a parameter. */
|
|
|
|
|
/* */
|
|
|
|
|
/* The coverage value is always between 0 and 255, even if the number */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* of gray levels have been set through QT_FT_Set_Gray_Levels(). */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
typedef struct QT_FT_Span_
|
|
|
|
|
{
|
|
|
|
|
short x;
|
|
|
|
|
unsigned short len;
|
|
|
|
|
short y;
|
|
|
|
|
unsigned char coverage;
|
|
|
|
|
} QT_FT_Span;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_SpanFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A function used as a call-back by the anti-aliased renderer in */
|
|
|
|
|
/* order to let client applications draw themselves the gray pixel */
|
|
|
|
|
/* spans on each scan line. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* y :: The scanline's y-coordinate. */
|
|
|
|
|
/* */
|
|
|
|
|
/* count :: The number of spans to draw on this scanline. */
|
|
|
|
|
/* */
|
|
|
|
|
/* spans :: A table of `count' spans to draw on the scanline. */
|
|
|
|
|
/* */
|
|
|
|
|
/* user :: User-supplied data that is passed to the callback. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* This callback allows client applications to directly render the */
|
|
|
|
|
/* gray spans of the anti-aliased bitmap to any kind of surfaces. */
|
|
|
|
|
/* */
|
|
|
|
|
/* This can be used to write anti-aliased outlines directly to a */
|
|
|
|
|
/* given background bitmap, and even perform translucency. */
|
|
|
|
|
/* */
|
|
|
|
|
/* Note that the `count' field cannot be greater than a fixed value */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* defined by the QT_FT_MAX_GRAY_SPANS configuration macro in */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* ftoption.h. By default, this value is set to 32, which means that */
|
|
|
|
|
/* if there are more than 32 spans on a given scanline, the callback */
|
|
|
|
|
/* will be called several times with the same `y' parameter in order */
|
|
|
|
|
/* to draw all callbacks. */
|
|
|
|
|
/* */
|
|
|
|
|
/* Otherwise, the callback is only called once per scan-line, and */
|
|
|
|
|
/* only for those scanlines that do have `gray' pixels on them. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef void
|
|
|
|
|
(*QT_FT_SpanFunc)(int count,
|
|
|
|
|
const QT_FT_Span* spans,
|
|
|
|
|
void* worker);
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Raster_Span_Func QT_FT_SpanFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Enum> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_RASTER_FLAG_XXX */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A list of bit flag constants as used in the `flags' field of a */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* @QT_FT_Raster_Params structure. */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Values> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_RASTER_FLAG_DEFAULT :: This value is 0. */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_RASTER_FLAG_AA :: This flag is set to indicate that an */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* anti-aliased glyph image should be */
|
|
|
|
|
/* generated. Otherwise, it will be */
|
|
|
|
|
/* monochrome (1-bit). */
|
|
|
|
|
/* */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_RASTER_FLAG_DIRECT :: This flag is set to indicate direct */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* rendering. In this mode, client */
|
|
|
|
|
/* applications must provide their own span */
|
|
|
|
|
/* callback. This lets them directly */
|
|
|
|
|
/* draw or compose over an existing bitmap. */
|
|
|
|
|
/* If this bit is not set, the target */
|
|
|
|
|
/* pixmap's buffer _must_ be zeroed before */
|
|
|
|
|
/* rendering. */
|
|
|
|
|
/* */
|
|
|
|
|
/* Note that for now, direct rendering is */
|
|
|
|
|
/* only possible with anti-aliased glyphs. */
|
|
|
|
|
/* */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_RASTER_FLAG_CLIP :: This flag is only used in direct */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* rendering mode. If set, the output will */
|
|
|
|
|
/* be clipped to a box specified in the */
|
|
|
|
|
/* "clip_box" field of the QT_FT_Raster_Params */
|
|
|
|
|
/* structure. */
|
|
|
|
|
/* */
|
|
|
|
|
/* Note that by default, the glyph bitmap */
|
|
|
|
|
/* is clipped to the target pixmap, except */
|
|
|
|
|
/* in direct rendering mode where all spans */
|
|
|
|
|
/* are generated if no clipping box is set. */
|
|
|
|
|
/* */
|
|
|
|
|
#define QT_FT_RASTER_FLAG_DEFAULT 0x0
|
|
|
|
|
#define QT_FT_RASTER_FLAG_AA 0x1
|
|
|
|
|
#define QT_FT_RASTER_FLAG_DIRECT 0x2
|
|
|
|
|
#define QT_FT_RASTER_FLAG_CLIP 0x4
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Struct> */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Raster_Params */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A structure to hold the arguments used by a raster's render */
|
|
|
|
|
/* function. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Fields> */
|
|
|
|
|
/* target :: The target bitmap. */
|
|
|
|
|
/* */
|
|
|
|
|
/* source :: A pointer to the source glyph image (e.g. an */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* QT_FT_Outline). */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* flags :: The rendering flags. */
|
|
|
|
|
/* */
|
|
|
|
|
/* gray_spans :: The gray span drawing callback. */
|
|
|
|
|
/* */
|
|
|
|
|
/* black_spans :: The black span drawing callback. */
|
|
|
|
|
/* */
|
|
|
|
|
/* user :: User-supplied data that is passed to each drawing */
|
|
|
|
|
/* callback. */
|
|
|
|
|
/* */
|
|
|
|
|
/* clip_box :: An optional clipping box. It is only used in */
|
|
|
|
|
/* direct rendering mode. Note that coordinates here */
|
|
|
|
|
/* should be expressed in _integer_ pixels (and not in */
|
|
|
|
|
/* 26.6 fixed-point units). */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* An anti-aliased glyph bitmap is drawn if the QT_FT_RASTER_FLAG_AA bit */
|
|
|
|
|
/* flag is set in the `flags' field, otherwise a monochrome bitmap */
|
|
|
|
|
/* will be generated. */
|
|
|
|
|
/* */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* If the QT_FT_RASTER_FLAG_DIRECT bit flag is set in `flags', the */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* raster will call the `gray_spans' callback to draw gray pixel */
|
|
|
|
|
/* spans, in the case of an aa glyph bitmap, it will call */
|
2016-06-28 13:49:11 +00:00
|
|
|
/* `black_spans' in the case of a monochrome bitmap. This allows */
|
|
|
|
|
/* direct composition over a pre-existing bitmap through */
|
|
|
|
|
/* user-provided callbacks to perform the span drawing/composition. */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* Note that the `bit_test' and `bit_set' callbacks are required when */
|
|
|
|
|
/* rendering a monochrome bitmap, as they are crucial to implement */
|
|
|
|
|
/* correct drop-out control as defined in the TrueType specification. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef struct QT_FT_Raster_Params_
|
|
|
|
|
{
|
|
|
|
|
void* source;
|
|
|
|
|
QT_FT_SpanFunc gray_spans;
|
|
|
|
|
QT_FT_SpanFunc black_spans;
|
|
|
|
|
void* user;
|
|
|
|
|
QT_FT_BBox clip_box;
|
|
|
|
|
int skip_spans;
|
|
|
|
|
|
|
|
|
|
} QT_FT_Raster_Params;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-07-24 14:29:42 +00:00
|
|
|
/* QT_FT_Raster_NewFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* A function used to create a new raster object. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Output> */
|
|
|
|
|
/* raster :: A handle to the new raster object. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Return> */
|
|
|
|
|
/* Error code. 0 means success. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef int
|
|
|
|
|
(*QT_FT_Raster_NewFunc)( QT_FT_Raster* raster );
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Raster_New_Func QT_FT_Raster_NewFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
2016-07-24 14:29:42 +00:00
|
|
|
/* QT_FT_Raster_ResetFunc */
|
2015-12-10 05:06:13 +02:00
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* FreeType provides an area of memory called the `render pool', */
|
|
|
|
|
/* available to all registered rasters. This pool can be freely used */
|
|
|
|
|
/* during a given scan-conversion but is shared by all rasters. Its */
|
|
|
|
|
/* content is thus transient. */
|
|
|
|
|
/* */
|
|
|
|
|
/* This function is called each time the render pool changes, or just */
|
|
|
|
|
/* after a new raster object is created. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* raster :: A handle to the new raster object. */
|
|
|
|
|
/* */
|
|
|
|
|
/* pool_base :: The address in memory of the render pool. */
|
|
|
|
|
/* */
|
|
|
|
|
/* pool_size :: The size in bytes of the render pool. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* Rasters can ignore the render pool and rely on dynamic memory */
|
|
|
|
|
/* allocation if they want to (a handle to the memory allocator is */
|
|
|
|
|
/* passed to the raster constructor). However, this is not */
|
|
|
|
|
/* recommended for efficiency purposes. */
|
|
|
|
|
/* */
|
|
|
|
|
typedef void
|
|
|
|
|
(*QT_FT_Raster_ResetFunc)( QT_FT_Raster raster,
|
2016-07-24 14:29:42 +00:00
|
|
|
char* pool_base,
|
|
|
|
|
long pool_size );
|
2015-12-10 05:06:13 +02:00
|
|
|
|
|
|
|
|
#define QT_FT_Raster_Reset_Func QT_FT_Raster_ResetFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <FuncType> */
|
|
|
|
|
/* QT_FT_Raster_RenderFunc */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Description> */
|
|
|
|
|
/* Invokes a given raster to scan-convert a given glyph image into a */
|
|
|
|
|
/* target bitmap. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Input> */
|
|
|
|
|
/* raster :: A handle to the raster object. */
|
|
|
|
|
/* */
|
|
|
|
|
/* params :: A pointer to a QT_FT_Raster_Params structure used to store */
|
|
|
|
|
/* the rendering parameters. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Return> */
|
|
|
|
|
/* Error code. 0 means success. */
|
|
|
|
|
/* */
|
|
|
|
|
/* <Note> */
|
|
|
|
|
/* The exact format of the source image depends on the raster's glyph */
|
|
|
|
|
/* format defined in its QT_FT_Raster_Funcs structure. It can be an */
|
|
|
|
|
/* QT_FT_Outline or anything else in order to support a large array of */
|
|
|
|
|
/* glyph formats. */
|
|
|
|
|
/* */
|
|
|
|
|
/* Note also that the render function can fail and return a */
|
|
|
|
|
/* QT_FT_Err_Unimplemented_Feature error code if the raster used does */
|
|
|
|
|
/* not support direct composition. */
|
|
|
|
|
/* */
|
|
|
|
|
/* XXX: For now, the standard raster doesn't support direct */
|
|
|
|
|
/* composition but this should change for the final release (see */
|
|
|
|
|
/* the files demos/src/ftgrays.c and demos/src/ftgrays2.c for */
|
|
|
|
|
/* examples of distinct implementations which support direct */
|
|
|
|
|
/* composition). */
|
|
|
|
|
/* */
|
|
|
|
|
typedef int
|
|
|
|
|
(*QT_FT_Raster_RenderFunc)( QT_FT_Raster raster,
|
|
|
|
|
QT_FT_Raster_Params* params );
|
|
|
|
|
|
|
|
|
|
#define QT_FT_Raster_Render_Func QT_FT_Raster_RenderFunc
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/
|
|
|
|
|
/* */
|
|
|
|
|
/* <Struct> */
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/* QT_FT_Raster_Funcs */
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/* */
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/* <Description> */
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/* A structure used to describe a given raster class to the library. */
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/* */
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/* <Fields> */
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/* glyph_format :: The supported glyph format for this raster. */
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/* */
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/* raster_new :: The raster constructor. */
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/* */
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/* raster_reset :: Used to reset the render pool within the raster. */
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/* */
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/* raster_render :: A function to render a glyph into a given bitmap. */
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/* */
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/* */
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typedef struct QT_FT_Raster_Funcs_
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{
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QT_FT_Glyph_Format glyph_format;
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QT_FT_Raster_NewFunc raster_new;
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QT_FT_Raster_ResetFunc raster_reset;
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QT_FT_Raster_RenderFunc raster_render;
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} QT_FT_Raster_Funcs;
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/* */
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QT_FT_END_HEADER
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#endif /* __FTIMAGE_H__ */
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/* END */
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