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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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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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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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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 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt 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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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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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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/*************************************************************************/
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/* */
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/* Note: A `raster' is simply a scan-line converter, used to render */
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/* QT_FT_Outlines into QT_FT_Bitmaps. */
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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 long 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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/* <Enum> */
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/* qt_ft_pixel_mode_xxx */
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/* */
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/* <Description> */
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/* A list of deprecated constants. Use the corresponding */
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/* @QT_FT_Pixel_Mode values instead. */
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/* */
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/* <Values> */
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/* qt_ft_pixel_mode_none :: see @QT_FT_PIXEL_MODE_NONE */
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/* qt_ft_pixel_mode_mono :: see @QT_FT_PIXEL_MODE_MONO */
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/* qt_ft_pixel_mode_grays :: see @QT_FT_PIXEL_MODE_GRAY */
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/* qt_ft_pixel_mode_pal2 :: see @QT_FT_PIXEL_MODE_GRAY2 */
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/* qt_ft_pixel_mode_pal4 :: see @QT_FT_PIXEL_MODE_GRAY4 */
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/* */
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#define qt_ft_pixel_mode_none QT_FT_PIXEL_MODE_NONE
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#define qt_ft_pixel_mode_mono QT_FT_PIXEL_MODE_MONO
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#define qt_ft_pixel_mode_grays QT_FT_PIXEL_MODE_GRAY
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#define qt_ft_pixel_mode_pal2 QT_FT_PIXEL_MODE_GRAY2
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#define qt_ft_pixel_mode_pal4 QT_FT_PIXEL_MODE_GRAY4
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/* */
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#if 0
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/*************************************************************************/
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/* */
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/* <Enum> */
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/* QT_FT_Palette_Mode */
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/* */
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/* <Description> */
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/* THIS TYPE IS DEPRECATED. DO NOT USE IT! */
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/* */
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/* An enumeration type used to describe the format of a bitmap */
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/* palette, used with qt_ft_pixel_mode_pal4 and qt_ft_pixel_mode_pal8. */
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/* */
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/* <Fields> */
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/* qt_ft_palette_mode_rgb :: The palette is an array of 3-bytes RGB */
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/* records. */
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/* */
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/* qt_ft_palette_mode_rgba :: The palette is an array of 4-bytes RGBA */
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/* records. */
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/* */
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/* <Note> */
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/* As qt_ft_pixel_mode_pal2, pal4 and pal8 are currently unused by */
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/* FreeType, these types are not handled by the library itself. */
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/* */
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typedef enum QT_FT_Palette_Mode_
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{
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qt_ft_palette_mode_rgb = 0,
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qt_ft_palette_mode_rgba,
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qt_ft_palettte_mode_max /* do not remove */
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} QT_FT_Palette_Mode;
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/* */
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#endif
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* QT_FT_Bitmap */
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/* */
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/* <Description> */
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/* A structure used to describe a bitmap or pixmap to the raster. */
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/* Note that we now manage pixmaps of various depths through the */
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/* `pixel_mode' field. */
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/* */
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/* <Fields> */
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/* rows :: The number of bitmap rows. */
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/* */
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/* width :: The number of pixels in bitmap row. */
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/* */
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/* pitch :: The pitch's absolute value is the number of bytes */
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/* taken by one bitmap row, including padding. */
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/* However, the pitch is positive when the bitmap has */
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/* a `down' flow, and negative when it has an `up' */
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/* flow. In all cases, the pitch is an offset to add */
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/* to a bitmap pointer in order to go down one row. */
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/* */
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/* buffer :: A typeless pointer to the bitmap buffer. This */
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/* value should be aligned on 32-bit boundaries in */
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/* most cases. */
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/* */
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/* num_grays :: This field is only used with */
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/* `QT_FT_PIXEL_MODE_GRAY'; it gives the number of gray */
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/* levels used in the bitmap. */
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/* */
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/* pixel_mode :: The pixel mode, i.e., how pixel bits are stored. */
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/* See @QT_FT_Pixel_Mode for possible values. */
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/* */
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/* palette_mode :: This field is only used with paletted pixel modes; */
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/* it indicates how the palette is stored. */
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/* */
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/* palette :: A typeless pointer to the bitmap palette; only */
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/* used for paletted pixel modes. */
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/* */
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/* <Note> */
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/* For now, the only pixel mode supported by FreeType are mono and */
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/* grays. However, drivers might be added in the future to support */
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/* more `colorful' options. */
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/* */
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/* When using pixel modes pal2, pal4 and pal8 with a void `palette' */
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/* field, a gray pixmap with respectively 4, 16, and 256 levels of */
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/* gray is assumed. This, in order to be compatible with some */
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/* embedded bitmap formats defined in the TrueType specification. */
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/* */
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/* Note that no font was found presenting such embedded bitmaps, so */
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/* this is currently completely unhandled by the library. */
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/* */
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typedef struct QT_FT_Bitmap_
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{
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int rows;
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int width;
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int pitch;
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unsigned char* buffer;
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short num_grays;
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char pixel_mode;
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char palette_mode;
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void* palette;
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} QT_FT_Bitmap;
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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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361 |
/* */
|
|
|
362 |
/* <Fields> */
|
|
|
363 |
/* n_contours :: The number of contours in the outline. */
|
|
|
364 |
/* */
|
|
|
365 |
/* n_points :: The number of points in the outline. */
|
|
|
366 |
/* */
|
|
|
367 |
/* points :: A pointer to an array of `n_points' QT_FT_Vector */
|
|
|
368 |
/* elements, giving the outline's point coordinates. */
|
|
|
369 |
/* */
|
|
|
370 |
/* tags :: A pointer to an array of `n_points' chars, giving */
|
|
|
371 |
/* each outline point's type. If bit 0 is unset, the */
|
|
|
372 |
/* point is `off' the curve, i.e. a Bezier control */
|
|
|
373 |
/* point, while it is `on' when set. */
|
|
|
374 |
/* */
|
|
|
375 |
/* Bit 1 is meaningful for `off' points only. If set, */
|
|
|
376 |
/* it indicates a third-order Bezier arc control point; */
|
|
|
377 |
/* and a second-order control point if unset. */
|
|
|
378 |
/* */
|
|
|
379 |
/* contours :: An array of `n_contours' shorts, giving the end */
|
|
|
380 |
/* point of each contour within the outline. For */
|
|
|
381 |
/* example, the first contour is defined by the points */
|
|
|
382 |
/* `0' to `contours[0]', the second one is defined by */
|
|
|
383 |
/* the points `contours[0]+1' to `contours[1]', etc. */
|
|
|
384 |
/* */
|
|
|
385 |
/* flags :: A set of bit flags used to characterize the outline */
|
|
|
386 |
/* and give hints to the scan-converter and hinter on */
|
|
|
387 |
/* how to convert/grid-fit it. See QT_FT_Outline_Flags. */
|
|
|
388 |
/* */
|
|
|
389 |
typedef struct QT_FT_Outline_
|
|
|
390 |
{
|
|
|
391 |
int n_contours; /* number of contours in glyph */
|
|
|
392 |
int n_points; /* number of points in the glyph */
|
|
|
393 |
|
|
|
394 |
QT_FT_Vector* points; /* the outline's points */
|
|
|
395 |
char* tags; /* the points flags */
|
|
|
396 |
int* contours; /* the contour end points */
|
|
|
397 |
|
|
|
398 |
int flags; /* outline masks */
|
|
|
399 |
|
|
|
400 |
} QT_FT_Outline;
|
|
|
401 |
|
|
|
402 |
|
|
|
403 |
/*************************************************************************/
|
|
|
404 |
/* */
|
|
|
405 |
/* <Enum> */
|
|
|
406 |
/* QT_FT_OUTLINE_FLAGS */
|
|
|
407 |
/* */
|
|
|
408 |
/* <Description> */
|
|
|
409 |
/* A list of bit-field constants use for the flags in an outline's */
|
|
|
410 |
/* `flags' field. */
|
|
|
411 |
/* */
|
|
|
412 |
/* <Values> */
|
|
|
413 |
/* QT_FT_OUTLINE_NONE :: Value 0 is reserved. */
|
|
|
414 |
/* */
|
|
|
415 |
/* QT_FT_OUTLINE_OWNER :: If set, this flag indicates that the */
|
|
|
416 |
/* outline's field arrays (i.e. */
|
|
|
417 |
/* `points', `flags' & `contours') are */
|
|
|
418 |
/* `owned' by the outline object, and */
|
|
|
419 |
/* should thus be freed when it is */
|
|
|
420 |
/* destroyed. */
|
|
|
421 |
/* */
|
|
|
422 |
/* QT_FT_OUTLINE_EVEN_ODD_FILL :: By default, outlines are filled using */
|
|
|
423 |
/* the non-zero winding rule. If set to */
|
|
|
424 |
/* 1, the outline will be filled using */
|
|
|
425 |
/* the even-odd fill rule (only works */
|
|
|
426 |
/* with the smooth raster). */
|
|
|
427 |
/* */
|
|
|
428 |
/* QT_FT_OUTLINE_REVERSE_FILL :: By default, outside contours of an */
|
|
|
429 |
/* outline are oriented in clock-wise */
|
|
|
430 |
/* direction, as defined in the TrueType */
|
|
|
431 |
/* specification. This flag is set if */
|
|
|
432 |
/* the outline uses the opposite */
|
|
|
433 |
/* direction (typically for Type 1 */
|
|
|
434 |
/* fonts). This flag is ignored by the */
|
|
|
435 |
/* scan-converter. However, it is very */
|
|
|
436 |
/* important for the auto-hinter. */
|
|
|
437 |
/* */
|
|
|
438 |
/* QT_FT_OUTLINE_IGNORE_DROPOUTS :: By default, the scan converter will */
|
|
|
439 |
/* try to detect drop-outs in an outline */
|
|
|
440 |
/* and correct the glyph bitmap to */
|
|
|
441 |
/* ensure consistent shape continuity. */
|
|
|
442 |
/* If set, this flag hints the scan-line */
|
|
|
443 |
/* converter to ignore such cases. */
|
|
|
444 |
/* */
|
|
|
445 |
/* QT_FT_OUTLINE_HIGH_PRECISION :: This flag indicates that the */
|
|
|
446 |
/* scan-line converter should try to */
|
|
|
447 |
/* convert this outline to bitmaps with */
|
|
|
448 |
/* the highest possible quality. It is */
|
|
|
449 |
/* typically set for small character */
|
|
|
450 |
/* sizes. Note that this is only a */
|
|
|
451 |
/* hint, that might be completely */
|
|
|
452 |
/* ignored by a given scan-converter. */
|
|
|
453 |
/* */
|
|
|
454 |
/* QT_FT_OUTLINE_SINGLE_PASS :: This flag is set to force a given */
|
|
|
455 |
/* scan-converter to only use a single */
|
|
|
456 |
/* pass over the outline to render a */
|
|
|
457 |
/* bitmap glyph image. Normally, it is */
|
|
|
458 |
/* set for very large character sizes. */
|
|
|
459 |
/* It is only a hint, that might be */
|
|
|
460 |
/* completely ignored by a given */
|
|
|
461 |
/* scan-converter. */
|
|
|
462 |
/* */
|
|
|
463 |
#define QT_FT_OUTLINE_NONE 0x0
|
|
|
464 |
#define QT_FT_OUTLINE_OWNER 0x1
|
|
|
465 |
#define QT_FT_OUTLINE_EVEN_ODD_FILL 0x2
|
|
|
466 |
#define QT_FT_OUTLINE_REVERSE_FILL 0x4
|
|
|
467 |
#define QT_FT_OUTLINE_IGNORE_DROPOUTS 0x8
|
|
|
468 |
|
|
|
469 |
#define QT_FT_OUTLINE_HIGH_PRECISION 0x100
|
|
|
470 |
#define QT_FT_OUTLINE_SINGLE_PASS 0x200
|
|
|
471 |
|
|
|
472 |
|
|
|
473 |
/*************************************************************************
|
|
|
474 |
*
|
|
|
475 |
* @enum:
|
|
|
476 |
* qt_ft_outline_flags
|
|
|
477 |
*
|
|
|
478 |
* @description:
|
|
|
479 |
* These constants are deprecated. Please use the corresponding
|
|
|
480 |
* @QT_FT_OUTLINE_FLAGS values.
|
|
|
481 |
*
|
|
|
482 |
* @values:
|
|
|
483 |
* qt_ft_outline_none :: See @QT_FT_OUTLINE_NONE.
|
|
|
484 |
* qt_ft_outline_owner :: See @QT_FT_OUTLINE_OWNER.
|
|
|
485 |
* qt_ft_outline_even_odd_fill :: See @QT_FT_OUTLINE_EVEN_ODD_FILL.
|
|
|
486 |
* qt_ft_outline_reverse_fill :: See @QT_FT_OUTLINE_REVERSE_FILL.
|
|
|
487 |
* qt_ft_outline_ignore_dropouts :: See @QT_FT_OUTLINE_IGNORE_DROPOUTS.
|
|
|
488 |
* qt_ft_outline_high_precision :: See @QT_FT_OUTLINE_HIGH_PRECISION.
|
|
|
489 |
* qt_ft_outline_single_pass :: See @QT_FT_OUTLINE_SINGLE_PASS.
|
|
|
490 |
*/
|
|
|
491 |
#define qt_ft_outline_none QT_FT_OUTLINE_NONE
|
|
|
492 |
#define qt_ft_outline_owner QT_FT_OUTLINE_OWNER
|
|
|
493 |
#define qt_ft_outline_even_odd_fill QT_FT_OUTLINE_EVEN_ODD_FILL
|
|
|
494 |
#define qt_ft_outline_reverse_fill QT_FT_OUTLINE_REVERSE_FILL
|
|
|
495 |
#define qt_ft_outline_ignore_dropouts QT_FT_OUTLINE_IGNORE_DROPOUTS
|
|
|
496 |
#define qt_ft_outline_high_precision QT_FT_OUTLINE_HIGH_PRECISION
|
|
|
497 |
#define qt_ft_outline_single_pass QT_FT_OUTLINE_SINGLE_PASS
|
|
|
498 |
|
|
|
499 |
/* */
|
|
|
500 |
|
|
|
501 |
#define QT_FT_CURVE_TAG( flag ) ( flag & 3 )
|
|
|
502 |
|
|
|
503 |
#define QT_FT_CURVE_TAG_ON 1
|
|
|
504 |
#define QT_FT_CURVE_TAG_CONIC 0
|
|
|
505 |
#define QT_FT_CURVE_TAG_CUBIC 2
|
|
|
506 |
|
|
|
507 |
#define QT_FT_CURVE_TAG_TOUCH_X 8 /* reserved for the TrueType hinter */
|
|
|
508 |
#define QT_FT_CURVE_TAG_TOUCH_Y 16 /* reserved for the TrueType hinter */
|
|
|
509 |
|
|
|
510 |
#define QT_FT_CURVE_TAG_TOUCH_BOTH ( QT_FT_CURVE_TAG_TOUCH_X | \
|
|
|
511 |
QT_FT_CURVE_TAG_TOUCH_Y )
|
|
|
512 |
|
|
|
513 |
#define QT_FT_Curve_Tag_On QT_FT_CURVE_TAG_ON
|
|
|
514 |
#define QT_FT_Curve_Tag_Conic QT_FT_CURVE_TAG_CONIC
|
|
|
515 |
#define QT_FT_Curve_Tag_Cubic QT_FT_CURVE_TAG_CUBIC
|
|
|
516 |
#define QT_FT_Curve_Tag_Touch_X QT_FT_CURVE_TAG_TOUCH_X
|
|
|
517 |
#define QT_FT_Curve_Tag_Touch_Y QT_FT_CURVE_TAG_TOUCH_Y
|
|
|
518 |
|
|
|
519 |
/*************************************************************************/
|
|
|
520 |
/* */
|
|
|
521 |
/* <FuncType> */
|
|
|
522 |
/* QT_FT_Outline_MoveToFunc */
|
|
|
523 |
/* */
|
|
|
524 |
/* <Description> */
|
|
|
525 |
/* A function pointer type used to describe the signature of a `move */
|
|
|
526 |
/* to' function during outline walking/decomposition. */
|
|
|
527 |
/* */
|
|
|
528 |
/* A `move to' is emitted to start a new contour in an outline. */
|
|
|
529 |
/* */
|
|
|
530 |
/* <Input> */
|
|
|
531 |
/* to :: A pointer to the target point of the `move to'. */
|
|
|
532 |
/* */
|
|
|
533 |
/* user :: A typeless pointer which is passed from the caller of the */
|
|
|
534 |
/* decomposition function. */
|
|
|
535 |
/* */
|
|
|
536 |
/* <Return> */
|
|
|
537 |
/* Error code. 0 means success. */
|
|
|
538 |
/* */
|
|
|
539 |
typedef int
|
|
|
540 |
(*QT_FT_Outline_MoveToFunc)( QT_FT_Vector* to,
|
|
|
541 |
void* user );
|
|
|
542 |
|
|
|
543 |
#define QT_FT_Outline_MoveTo_Func QT_FT_Outline_MoveToFunc
|
|
|
544 |
|
|
|
545 |
/*************************************************************************/
|
|
|
546 |
/* */
|
|
|
547 |
/* <FuncType> */
|
|
|
548 |
/* QT_FT_Outline_LineToFunc */
|
|
|
549 |
/* */
|
|
|
550 |
/* <Description> */
|
|
|
551 |
/* A function pointer type used to describe the signature of a `line */
|
|
|
552 |
/* to' function during outline walking/decomposition. */
|
|
|
553 |
/* */
|
|
|
554 |
/* A `line to' is emitted to indicate a segment in the outline. */
|
|
|
555 |
/* */
|
|
|
556 |
/* <Input> */
|
|
|
557 |
/* to :: A pointer to the target point of the `line to'. */
|
|
|
558 |
/* */
|
|
|
559 |
/* user :: A typeless pointer which is passed from the caller of the */
|
|
|
560 |
/* decomposition function. */
|
|
|
561 |
/* */
|
|
|
562 |
/* <Return> */
|
|
|
563 |
/* Error code. 0 means success. */
|
|
|
564 |
/* */
|
|
|
565 |
typedef int
|
|
|
566 |
(*QT_FT_Outline_LineToFunc)( QT_FT_Vector* to,
|
|
|
567 |
void* user );
|
|
|
568 |
|
|
|
569 |
#define QT_FT_Outline_LineTo_Func QT_FT_Outline_LineToFunc
|
|
|
570 |
|
|
|
571 |
/*************************************************************************/
|
|
|
572 |
/* */
|
|
|
573 |
/* <FuncType> */
|
|
|
574 |
/* QT_FT_Outline_ConicToFunc */
|
|
|
575 |
/* */
|
|
|
576 |
/* <Description> */
|
|
|
577 |
/* A function pointer type use to describe the signature of a `conic */
|
|
|
578 |
/* to' function during outline walking/decomposition. */
|
|
|
579 |
/* */
|
|
|
580 |
/* A `conic to' is emitted to indicate a second-order Bezier arc in */
|
|
|
581 |
/* the outline. */
|
|
|
582 |
/* */
|
|
|
583 |
/* <Input> */
|
|
|
584 |
/* control :: An intermediate control point between the last position */
|
|
|
585 |
/* and the new target in `to'. */
|
|
|
586 |
/* */
|
|
|
587 |
/* to :: A pointer to the target end point of the conic arc. */
|
|
|
588 |
/* */
|
|
|
589 |
/* user :: A typeless pointer which is passed from the caller of */
|
|
|
590 |
/* the decomposition function. */
|
|
|
591 |
/* */
|
|
|
592 |
/* <Return> */
|
|
|
593 |
/* Error code. 0 means success. */
|
|
|
594 |
/* */
|
|
|
595 |
typedef int
|
|
|
596 |
(*QT_FT_Outline_ConicToFunc)( QT_FT_Vector* control,
|
|
|
597 |
QT_FT_Vector* to,
|
|
|
598 |
void* user );
|
|
|
599 |
|
|
|
600 |
#define QT_FT_Outline_ConicTo_Func QT_FT_Outline_ConicToFunc
|
|
|
601 |
|
|
|
602 |
/*************************************************************************/
|
|
|
603 |
/* */
|
|
|
604 |
/* <FuncType> */
|
|
|
605 |
/* QT_FT_Outline_CubicToFunc */
|
|
|
606 |
/* */
|
|
|
607 |
/* <Description> */
|
|
|
608 |
/* A function pointer type used to describe the signature of a `cubic */
|
|
|
609 |
/* to' function during outline walking/decomposition. */
|
|
|
610 |
/* */
|
|
|
611 |
/* A `cubic to' is emitted to indicate a third-order Bezier arc. */
|
|
|
612 |
/* */
|
|
|
613 |
/* <Input> */
|
|
|
614 |
/* control1 :: A pointer to the first Bezier control point. */
|
|
|
615 |
/* */
|
|
|
616 |
/* control2 :: A pointer to the second Bezier control point. */
|
|
|
617 |
/* */
|
|
|
618 |
/* to :: A pointer to the target end point. */
|
|
|
619 |
/* */
|
|
|
620 |
/* user :: A typeless pointer which is passed from the caller of */
|
|
|
621 |
/* the decomposition function. */
|
|
|
622 |
/* */
|
|
|
623 |
/* <Return> */
|
|
|
624 |
/* Error code. 0 means success. */
|
|
|
625 |
/* */
|
|
|
626 |
typedef int
|
|
|
627 |
(*QT_FT_Outline_CubicToFunc)( QT_FT_Vector* control1,
|
|
|
628 |
QT_FT_Vector* control2,
|
|
|
629 |
QT_FT_Vector* to,
|
|
|
630 |
void* user );
|
|
|
631 |
|
|
|
632 |
#define QT_FT_Outline_CubicTo_Func QT_FT_Outline_CubicToFunc
|
|
|
633 |
|
|
|
634 |
|
|
|
635 |
/*************************************************************************/
|
|
|
636 |
/* */
|
|
|
637 |
/* <Struct> */
|
|
|
638 |
/* QT_FT_Outline_Funcs */
|
|
|
639 |
/* */
|
|
|
640 |
/* <Description> */
|
|
|
641 |
/* A structure to hold various function pointers used during outline */
|
|
|
642 |
/* decomposition in order to emit segments, conic, and cubic Beziers, */
|
|
|
643 |
/* as well as `move to' and `close to' operations. */
|
|
|
644 |
/* */
|
|
|
645 |
/* <Fields> */
|
|
|
646 |
/* move_to :: The `move to' emitter. */
|
|
|
647 |
/* */
|
|
|
648 |
/* line_to :: The segment emitter. */
|
|
|
649 |
/* */
|
|
|
650 |
/* conic_to :: The second-order Bezier arc emitter. */
|
|
|
651 |
/* */
|
|
|
652 |
/* cubic_to :: The third-order Bezier arc emitter. */
|
|
|
653 |
/* */
|
|
|
654 |
/* shift :: The shift that is applied to coordinates before they */
|
|
|
655 |
/* are sent to the emitter. */
|
|
|
656 |
/* */
|
|
|
657 |
/* delta :: The delta that is applied to coordinates before they */
|
|
|
658 |
/* are sent to the emitter, but after the shift. */
|
|
|
659 |
/* */
|
|
|
660 |
/* <Note> */
|
|
|
661 |
/* The point coordinates sent to the emitters are the transformed */
|
|
|
662 |
/* version of the original coordinates (this is important for high */
|
|
|
663 |
/* accuracy during scan-conversion). The transformation is simple: */
|
|
|
664 |
/* */
|
|
|
665 |
/* x' = (x << shift) - delta */
|
|
|
666 |
/* y' = (x << shift) - delta */
|
|
|
667 |
/* */
|
|
|
668 |
/* Set the value of `shift' and `delta' to 0 to get the original */
|
|
|
669 |
/* point coordinates. */
|
|
|
670 |
/* */
|
|
|
671 |
typedef struct QT_FT_Outline_Funcs_
|
|
|
672 |
{
|
|
|
673 |
QT_FT_Outline_MoveToFunc move_to;
|
|
|
674 |
QT_FT_Outline_LineToFunc line_to;
|
|
|
675 |
QT_FT_Outline_ConicToFunc conic_to;
|
|
|
676 |
QT_FT_Outline_CubicToFunc cubic_to;
|
|
|
677 |
|
|
|
678 |
int shift;
|
|
|
679 |
QT_FT_Pos delta;
|
|
|
680 |
|
|
|
681 |
} QT_FT_Outline_Funcs;
|
|
|
682 |
|
|
|
683 |
|
|
|
684 |
/*************************************************************************/
|
|
|
685 |
/* */
|
|
|
686 |
/* <Section> */
|
|
|
687 |
/* basic_types */
|
|
|
688 |
/* */
|
|
|
689 |
/*************************************************************************/
|
|
|
690 |
|
|
|
691 |
|
|
|
692 |
/*************************************************************************/
|
|
|
693 |
/* */
|
|
|
694 |
/* <Macro> */
|
|
|
695 |
/* QT_FT_IMAGE_TAG */
|
|
|
696 |
/* */
|
|
|
697 |
/* <Description> */
|
|
|
698 |
/* This macro converts four letter tags into an unsigned long. */
|
|
|
699 |
/* */
|
|
|
700 |
/* <Note> */
|
|
|
701 |
/* Since many 16bit compilers don't like 32bit enumerations, you */
|
|
|
702 |
/* should redefine this macro in case of problems to something like */
|
|
|
703 |
/* this: */
|
|
|
704 |
/* */
|
|
|
705 |
/* #define QT_FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) value */
|
|
|
706 |
/* */
|
|
|
707 |
/* to get a simple enumeration without assigning special numbers. */
|
|
|
708 |
/* */
|
|
|
709 |
#ifndef QT_FT_IMAGE_TAG
|
|
|
710 |
#define QT_FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) \
|
|
|
711 |
value = ( ( (unsigned long)_x1 << 24 ) | \
|
|
|
712 |
( (unsigned long)_x2 << 16 ) | \
|
|
|
713 |
( (unsigned long)_x3 << 8 ) | \
|
|
|
714 |
(unsigned long)_x4 )
|
|
|
715 |
#endif /* QT_FT_IMAGE_TAG */
|
|
|
716 |
|
|
|
717 |
|
|
|
718 |
/*************************************************************************/
|
|
|
719 |
/* */
|
|
|
720 |
/* <Enum> */
|
|
|
721 |
/* QT_FT_Glyph_Format */
|
|
|
722 |
/* */
|
|
|
723 |
/* <Description> */
|
|
|
724 |
/* An enumeration type used to describe the format of a given glyph */
|
|
|
725 |
/* image. Note that this version of FreeType only supports two image */
|
|
|
726 |
/* formats, even though future font drivers will be able to register */
|
|
|
727 |
/* their own format. */
|
|
|
728 |
/* */
|
|
|
729 |
/* <Values> */
|
|
|
730 |
/* QT_FT_GLYPH_FORMAT_NONE :: */
|
|
|
731 |
/* The value 0 is reserved and does describe a glyph format. */
|
|
|
732 |
/* */
|
|
|
733 |
/* QT_FT_GLYPH_FORMAT_COMPOSITE :: */
|
|
|
734 |
/* The glyph image is a composite of several other images. This */
|
|
|
735 |
/* format is _only_ used with @QT_FT_LOAD_NO_RECURSE, and is used to */
|
|
|
736 |
/* report compound glyphs (like accented characters). */
|
|
|
737 |
/* */
|
|
|
738 |
/* QT_FT_GLYPH_FORMAT_BITMAP :: */
|
|
|
739 |
/* The glyph image is a bitmap, and can be described as an */
|
|
|
740 |
/* @QT_FT_Bitmap. You generally need to access the `bitmap' field of */
|
|
|
741 |
/* the @QT_FT_GlyphSlotRec structure to read it. */
|
|
|
742 |
/* */
|
|
|
743 |
/* QT_FT_GLYPH_FORMAT_OUTLINE :: */
|
|
|
744 |
/* The glyph image is a vertorial outline made of line segments */
|
|
|
745 |
/* and Bezier arcs; it can be described as an @QT_FT_Outline; you */
|
|
|
746 |
/* generally want to access the `outline' field of the */
|
|
|
747 |
/* @QT_FT_GlyphSlotRec structure to read it. */
|
|
|
748 |
/* */
|
|
|
749 |
/* QT_FT_GLYPH_FORMAT_PLOTTER :: */
|
|
|
750 |
/* The glyph image is a vectorial path with no inside/outside */
|
|
|
751 |
/* contours. Some Type 1 fonts, like those in the Hershey family, */
|
|
|
752 |
/* contain glyphs in this format. These are described as */
|
|
|
753 |
/* @QT_FT_Outline, but FreeType isn't currently capable of rendering */
|
|
|
754 |
/* them correctly. */
|
|
|
755 |
/* */
|
|
|
756 |
typedef enum QT_FT_Glyph_Format_
|
|
|
757 |
{
|
|
|
758 |
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_NONE, 0, 0, 0, 0 ),
|
|
|
759 |
|
|
|
760 |
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_COMPOSITE, 'c', 'o', 'm', 'p' ),
|
|
|
761 |
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_BITMAP, 'b', 'i', 't', 's' ),
|
|
|
762 |
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_OUTLINE, 'o', 'u', 't', 'l' ),
|
|
|
763 |
QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_PLOTTER, 'p', 'l', 'o', 't' )
|
|
|
764 |
|
|
|
765 |
} QT_FT_Glyph_Format;
|
|
|
766 |
|
|
|
767 |
|
|
|
768 |
/*************************************************************************/
|
|
|
769 |
/* */
|
|
|
770 |
/* <Enum> */
|
|
|
771 |
/* qt_ft_glyph_format_xxx */
|
|
|
772 |
/* */
|
|
|
773 |
/* <Description> */
|
|
|
774 |
/* A list of decprecated constants. Use the corresponding */
|
|
|
775 |
/* @QT_FT_Glyph_Format values instead. */
|
|
|
776 |
/* */
|
|
|
777 |
/* <Values> */
|
|
|
778 |
/* qt_ft_glyph_format_none :: see @QT_FT_GLYPH_FORMAT_NONE */
|
|
|
779 |
/* qt_ft_glyph_format_composite :: see @QT_FT_GLYPH_FORMAT_COMPOSITE */
|
|
|
780 |
/* qt_ft_glyph_format_bitmap :: see @QT_FT_GLYPH_FORMAT_BITMAP */
|
|
|
781 |
/* qt_ft_glyph_format_outline :: see @QT_FT_GLYPH_FORMAT_OUTLINE */
|
|
|
782 |
/* qt_ft_glyph_format_plotter :: see @QT_FT_GLYPH_FORMAT_PLOTTER */
|
|
|
783 |
/* */
|
|
|
784 |
#define qt_ft_glyph_format_none QT_FT_GLYPH_FORMAT_NONE
|
|
|
785 |
#define qt_ft_glyph_format_composite QT_FT_GLYPH_FORMAT_COMPOSITE
|
|
|
786 |
#define qt_ft_glyph_format_bitmap QT_FT_GLYPH_FORMAT_BITMAP
|
|
|
787 |
#define qt_ft_glyph_format_outline QT_FT_GLYPH_FORMAT_OUTLINE
|
|
|
788 |
#define qt_ft_glyph_format_plotter QT_FT_GLYPH_FORMAT_PLOTTER
|
|
|
789 |
|
|
|
790 |
|
|
|
791 |
/*************************************************************************/
|
|
|
792 |
/*************************************************************************/
|
|
|
793 |
/*************************************************************************/
|
|
|
794 |
/***** *****/
|
|
|
795 |
/***** R A S T E R D E F I N I T I O N S *****/
|
|
|
796 |
/***** *****/
|
|
|
797 |
/*************************************************************************/
|
|
|
798 |
/*************************************************************************/
|
|
|
799 |
/*************************************************************************/
|
|
|
800 |
|
|
|
801 |
|
|
|
802 |
/*************************************************************************/
|
|
|
803 |
/* */
|
|
|
804 |
/* A raster is a scan converter, in charge of rendering an outline into */
|
|
|
805 |
/* a a bitmap. This section contains the public API for rasters. */
|
|
|
806 |
/* */
|
|
|
807 |
/* Note that in FreeType 2, all rasters are now encapsulated within */
|
|
|
808 |
/* specific modules called `renderers'. See `freetype/ftrender.h' for */
|
|
|
809 |
/* more details on renderers. */
|
|
|
810 |
/* */
|
|
|
811 |
/*************************************************************************/
|
|
|
812 |
|
|
|
813 |
|
|
|
814 |
/*************************************************************************/
|
|
|
815 |
/* */
|
|
|
816 |
/* <Section> */
|
|
|
817 |
/* raster */
|
|
|
818 |
/* */
|
|
|
819 |
/* <Title> */
|
|
|
820 |
/* Scanline converter */
|
|
|
821 |
/* */
|
|
|
822 |
/* <Abstract> */
|
|
|
823 |
/* How vectorial outlines are converted into bitmaps and pixmaps. */
|
|
|
824 |
/* */
|
|
|
825 |
/* <Description> */
|
|
|
826 |
/* This section contains technical definitions. */
|
|
|
827 |
/* */
|
|
|
828 |
/*************************************************************************/
|
|
|
829 |
|
|
|
830 |
|
|
|
831 |
/*************************************************************************/
|
|
|
832 |
/* */
|
|
|
833 |
/* <Type> */
|
|
|
834 |
/* QT_FT_Raster */
|
|
|
835 |
/* */
|
|
|
836 |
/* <Description> */
|
|
|
837 |
/* A handle (pointer) to a raster object. Each object can be used */
|
|
|
838 |
/* independently to convert an outline into a bitmap or pixmap. */
|
|
|
839 |
/* */
|
|
|
840 |
typedef struct QT_FT_RasterRec_* QT_FT_Raster;
|
|
|
841 |
|
|
|
842 |
|
|
|
843 |
/*************************************************************************/
|
|
|
844 |
/* */
|
|
|
845 |
/* <Struct> */
|
|
|
846 |
/* QT_FT_Span */
|
|
|
847 |
/* */
|
|
|
848 |
/* <Description> */
|
|
|
849 |
/* A structure used to model a single span of gray (or black) pixels */
|
|
|
850 |
/* when rendering a monochrome or anti-aliased bitmap. */
|
|
|
851 |
/* */
|
|
|
852 |
/* <Fields> */
|
|
|
853 |
/* x :: The span's horizontal start position. */
|
|
|
854 |
/* */
|
|
|
855 |
/* len :: The span's length in pixels. */
|
|
|
856 |
/* */
|
|
|
857 |
/* coverage :: The span color/coverage, ranging from 0 (background) */
|
|
|
858 |
/* to 255 (foreground). Only used for anti-aliased */
|
|
|
859 |
/* rendering. */
|
|
|
860 |
/* */
|
|
|
861 |
/* <Note> */
|
|
|
862 |
/* This structure is used by the span drawing callback type named */
|
|
|
863 |
/* QT_FT_SpanFunc which takes the y-coordinate of the span as a */
|
|
|
864 |
/* a parameter. */
|
|
|
865 |
/* */
|
|
|
866 |
/* The coverage value is always between 0 and 255, even if the number */
|
|
|
867 |
/* of gray levels have been set through QT_FT_Set_Gray_Levels(). */
|
|
|
868 |
/* */
|
|
|
869 |
typedef struct QT_FT_Span_
|
|
|
870 |
{
|
|
|
871 |
short x;
|
|
|
872 |
unsigned short len;
|
|
|
873 |
short y;
|
|
|
874 |
unsigned char coverage;
|
|
|
875 |
} QT_FT_Span;
|
|
|
876 |
|
|
|
877 |
|
|
|
878 |
/*************************************************************************/
|
|
|
879 |
/* */
|
|
|
880 |
/* <FuncType> */
|
|
|
881 |
/* QT_FT_SpanFunc */
|
|
|
882 |
/* */
|
|
|
883 |
/* <Description> */
|
|
|
884 |
/* A function used as a call-back by the anti-aliased renderer in */
|
|
|
885 |
/* order to let client applications draw themselves the gray pixel */
|
|
|
886 |
/* spans on each scan line. */
|
|
|
887 |
/* */
|
|
|
888 |
/* <Input> */
|
|
|
889 |
/* y :: The scanline's y-coordinate. */
|
|
|
890 |
/* */
|
|
|
891 |
/* count :: The number of spans to draw on this scanline. */
|
|
|
892 |
/* */
|
|
|
893 |
/* spans :: A table of `count' spans to draw on the scanline. */
|
|
|
894 |
/* */
|
|
|
895 |
/* user :: User-supplied data that is passed to the callback. */
|
|
|
896 |
/* */
|
|
|
897 |
/* <Note> */
|
|
|
898 |
/* This callback allows client applications to directly render the */
|
|
|
899 |
/* gray spans of the anti-aliased bitmap to any kind of surfaces. */
|
|
|
900 |
/* */
|
|
|
901 |
/* This can be used to write anti-aliased outlines directly to a */
|
|
|
902 |
/* given background bitmap, and even perform translucency. */
|
|
|
903 |
/* */
|
|
|
904 |
/* Note that the `count' field cannot be greater than a fixed value */
|
|
|
905 |
/* defined by the QT_FT_MAX_GRAY_SPANS configuration macro in */
|
|
|
906 |
/* ftoption.h. By default, this value is set to 32, which means that */
|
|
|
907 |
/* if there are more than 32 spans on a given scanline, the callback */
|
|
|
908 |
/* will be called several times with the same `y' parameter in order */
|
|
|
909 |
/* to draw all callbacks. */
|
|
|
910 |
/* */
|
|
|
911 |
/* Otherwise, the callback is only called once per scan-line, and */
|
|
|
912 |
/* only for those scanlines that do have `gray' pixels on them. */
|
|
|
913 |
/* */
|
|
|
914 |
typedef void
|
|
|
915 |
(*QT_FT_SpanFunc)(int count,
|
|
|
916 |
const QT_FT_Span* spans,
|
|
|
917 |
void* worker);
|
|
|
918 |
|
|
|
919 |
#define QT_FT_Raster_Span_Func QT_FT_SpanFunc
|
|
|
920 |
|
|
|
921 |
|
|
|
922 |
/*************************************************************************/
|
|
|
923 |
/* */
|
|
|
924 |
/* <FuncType> */
|
|
|
925 |
/* QT_FT_Raster_BitTest_Func */
|
|
|
926 |
/* */
|
|
|
927 |
/* <Description> */
|
|
|
928 |
/* THIS TYPE IS DEPRECATED. DO NOT USE IT. */
|
|
|
929 |
/* */
|
|
|
930 |
/* A function used as a call-back by the monochrome scan-converter */
|
|
|
931 |
/* to test whether a given target pixel is already set to the drawing */
|
|
|
932 |
/* `color'. These tests are crucial to implement drop-out control */
|
|
|
933 |
/* per-se the TrueType spec. */
|
|
|
934 |
/* */
|
|
|
935 |
/* <Input> */
|
|
|
936 |
/* y :: The pixel's y-coordinate. */
|
|
|
937 |
/* */
|
|
|
938 |
/* x :: The pixel's x-coordinate. */
|
|
|
939 |
/* */
|
|
|
940 |
/* user :: User-supplied data that is passed to the callback. */
|
|
|
941 |
/* */
|
|
|
942 |
/* <Return> */
|
|
|
943 |
/* 1 if the pixel is `set', 0 otherwise. */
|
|
|
944 |
/* */
|
|
|
945 |
typedef int
|
|
|
946 |
(*QT_FT_Raster_BitTest_Func)( int y,
|
|
|
947 |
int x,
|
|
|
948 |
void* user );
|
|
|
949 |
|
|
|
950 |
|
|
|
951 |
/*************************************************************************/
|
|
|
952 |
/* */
|
|
|
953 |
/* <FuncType> */
|
|
|
954 |
/* QT_FT_Raster_BitSet_Func */
|
|
|
955 |
/* */
|
|
|
956 |
/* <Description> */
|
|
|
957 |
/* THIS TYPE IS DEPRECATED. DO NOT USE IT. */
|
|
|
958 |
/* */
|
|
|
959 |
/* A function used as a call-back by the monochrome scan-converter */
|
|
|
960 |
/* to set an individual target pixel. This is crucial to implement */
|
|
|
961 |
/* drop-out control according to the TrueType specification. */
|
|
|
962 |
/* */
|
|
|
963 |
/* <Input> */
|
|
|
964 |
/* y :: The pixel's y-coordinate. */
|
|
|
965 |
/* */
|
|
|
966 |
/* x :: The pixel's x-coordinate. */
|
|
|
967 |
/* */
|
|
|
968 |
/* user :: User-supplied data that is passed to the callback. */
|
|
|
969 |
/* */
|
|
|
970 |
/* <Return> */
|
|
|
971 |
/* 1 if the pixel is `set', 0 otherwise. */
|
|
|
972 |
/* */
|
|
|
973 |
typedef void
|
|
|
974 |
(*QT_FT_Raster_BitSet_Func)( int y,
|
|
|
975 |
int x,
|
|
|
976 |
void* user );
|
|
|
977 |
|
|
|
978 |
|
|
|
979 |
/*************************************************************************/
|
|
|
980 |
/* */
|
|
|
981 |
/* <Enum> */
|
|
|
982 |
/* QT_FT_RASTER_FLAG_XXX */
|
|
|
983 |
/* */
|
|
|
984 |
/* <Description> */
|
|
|
985 |
/* A list of bit flag constants as used in the `flags' field of a */
|
|
|
986 |
/* @QT_FT_Raster_Params structure. */
|
|
|
987 |
/* */
|
|
|
988 |
/* <Values> */
|
|
|
989 |
/* QT_FT_RASTER_FLAG_DEFAULT :: This value is 0. */
|
|
|
990 |
/* */
|
|
|
991 |
/* QT_FT_RASTER_FLAG_AA :: This flag is set to indicate that an */
|
|
|
992 |
/* anti-aliased glyph image should be */
|
|
|
993 |
/* generated. Otherwise, it will be */
|
|
|
994 |
/* monochrome (1-bit). */
|
|
|
995 |
/* */
|
|
|
996 |
/* QT_FT_RASTER_FLAG_DIRECT :: This flag is set to indicate direct */
|
|
|
997 |
/* rendering. In this mode, client */
|
|
|
998 |
/* applications must provide their own span */
|
|
|
999 |
/* callback. This lets them directly */
|
|
|
1000 |
/* draw or compose over an existing bitmap. */
|
|
|
1001 |
/* If this bit is not set, the target */
|
|
|
1002 |
/* pixmap's buffer _must_ be zeroed before */
|
|
|
1003 |
/* rendering. */
|
|
|
1004 |
/* */
|
|
|
1005 |
/* Note that for now, direct rendering is */
|
|
|
1006 |
/* only possible with anti-aliased glyphs. */
|
|
|
1007 |
/* */
|
|
|
1008 |
/* QT_FT_RASTER_FLAG_CLIP :: This flag is only used in direct */
|
|
|
1009 |
/* rendering mode. If set, the output will */
|
|
|
1010 |
/* be clipped to a box specified in the */
|
|
|
1011 |
/* "clip_box" field of the QT_FT_Raster_Params */
|
|
|
1012 |
/* structure. */
|
|
|
1013 |
/* */
|
|
|
1014 |
/* Note that by default, the glyph bitmap */
|
|
|
1015 |
/* is clipped to the target pixmap, except */
|
|
|
1016 |
/* in direct rendering mode where all spans */
|
|
|
1017 |
/* are generated if no clipping box is set. */
|
|
|
1018 |
/* */
|
|
|
1019 |
#define QT_FT_RASTER_FLAG_DEFAULT 0x0
|
|
|
1020 |
#define QT_FT_RASTER_FLAG_AA 0x1
|
|
|
1021 |
#define QT_FT_RASTER_FLAG_DIRECT 0x2
|
|
|
1022 |
#define QT_FT_RASTER_FLAG_CLIP 0x4
|
|
|
1023 |
|
|
|
1024 |
/* deprecated */
|
|
|
1025 |
#define qt_ft_raster_flag_default QT_FT_RASTER_FLAG_DEFAULT
|
|
|
1026 |
#define qt_ft_raster_flag_aa QT_FT_RASTER_FLAG_AA
|
|
|
1027 |
#define qt_ft_raster_flag_direct QT_FT_RASTER_FLAG_DIRECT
|
|
|
1028 |
#define qt_ft_raster_flag_clip QT_FT_RASTER_FLAG_CLIP
|
|
|
1029 |
|
|
|
1030 |
|
|
|
1031 |
/*************************************************************************/
|
|
|
1032 |
/* */
|
|
|
1033 |
/* <Struct> */
|
|
|
1034 |
/* QT_FT_Raster_Params */
|
|
|
1035 |
/* */
|
|
|
1036 |
/* <Description> */
|
|
|
1037 |
/* A structure to hold the arguments used by a raster's render */
|
|
|
1038 |
/* function. */
|
|
|
1039 |
/* */
|
|
|
1040 |
/* <Fields> */
|
|
|
1041 |
/* target :: The target bitmap. */
|
|
|
1042 |
/* */
|
|
|
1043 |
/* source :: A pointer to the source glyph image (e.g. an */
|
|
|
1044 |
/* QT_FT_Outline). */
|
|
|
1045 |
/* */
|
|
|
1046 |
/* flags :: The rendering flags. */
|
|
|
1047 |
/* */
|
|
|
1048 |
/* gray_spans :: The gray span drawing callback. */
|
|
|
1049 |
/* */
|
|
|
1050 |
/* black_spans :: The black span drawing callback. */
|
|
|
1051 |
/* */
|
|
|
1052 |
/* bit_test :: The bit test callback. UNIMPLEMENTED! */
|
|
|
1053 |
/* */
|
|
|
1054 |
/* bit_set :: The bit set callback. UNIMPLEMENTED! */
|
|
|
1055 |
/* */
|
|
|
1056 |
/* user :: User-supplied data that is passed to each drawing */
|
|
|
1057 |
/* callback. */
|
|
|
1058 |
/* */
|
|
|
1059 |
/* clip_box :: An optional clipping box. It is only used in */
|
|
|
1060 |
/* direct rendering mode. Note that coordinates here */
|
|
|
1061 |
/* should be expressed in _integer_ pixels (and not in */
|
|
|
1062 |
/* 26.6 fixed-point units). */
|
|
|
1063 |
/* */
|
|
|
1064 |
/* <Note> */
|
|
|
1065 |
/* An anti-aliased glyph bitmap is drawn if the QT_FT_RASTER_FLAG_AA bit */
|
|
|
1066 |
/* flag is set in the `flags' field, otherwise a monochrome bitmap */
|
|
|
1067 |
/* will be generated. */
|
|
|
1068 |
/* */
|
|
|
1069 |
/* If the QT_FT_RASTER_FLAG_DIRECT bit flag is set in `flags', the */
|
|
|
1070 |
/* raster will call the `gray_spans' callback to draw gray pixel */
|
|
|
1071 |
/* spans, in the case of an aa glyph bitmap, it will call */
|
|
|
1072 |
/* `black_spans', and `bit_test' and `bit_set' in the case of a */
|
|
|
1073 |
/* monochrome bitmap. This allows direct composition over a */
|
|
|
1074 |
/* pre-existing bitmap through user-provided callbacks to perform the */
|
|
|
1075 |
/* span drawing/composition. */
|
|
|
1076 |
/* */
|
|
|
1077 |
/* Note that the `bit_test' and `bit_set' callbacks are required when */
|
|
|
1078 |
/* rendering a monochrome bitmap, as they are crucial to implement */
|
|
|
1079 |
/* correct drop-out control as defined in the TrueType specification. */
|
|
|
1080 |
/* */
|
|
|
1081 |
typedef struct QT_FT_Raster_Params_
|
|
|
1082 |
{
|
|
|
1083 |
QT_FT_Bitmap* target;
|
|
|
1084 |
void* source;
|
|
|
1085 |
int flags;
|
|
|
1086 |
QT_FT_SpanFunc gray_spans;
|
|
|
1087 |
QT_FT_SpanFunc black_spans;
|
|
|
1088 |
QT_FT_Raster_BitTest_Func bit_test; /* doesn't work! */
|
|
|
1089 |
QT_FT_Raster_BitSet_Func bit_set; /* doesn't work! */
|
|
|
1090 |
void* user;
|
|
|
1091 |
QT_FT_BBox clip_box;
|
|
|
1092 |
|
|
|
1093 |
} QT_FT_Raster_Params;
|
|
|
1094 |
|
|
|
1095 |
|
|
|
1096 |
/*************************************************************************/
|
|
|
1097 |
/* */
|
|
|
1098 |
/* <FuncType> */
|
|
|
1099 |
/* QT_FT_Raster_NewFunc */
|
|
|
1100 |
/* */
|
|
|
1101 |
/* <Description> */
|
|
|
1102 |
/* A function used to create a new raster object. */
|
|
|
1103 |
/* */
|
|
|
1104 |
/* <Input> */
|
|
|
1105 |
/* memory :: A handle to the memory allocator. */
|
|
|
1106 |
/* */
|
|
|
1107 |
/* <Output> */
|
|
|
1108 |
/* raster :: A handle to the new raster object. */
|
|
|
1109 |
/* */
|
|
|
1110 |
/* <Return> */
|
|
|
1111 |
/* Error code. 0 means success. */
|
|
|
1112 |
/* */
|
|
|
1113 |
/* <Note> */
|
|
|
1114 |
/* The `memory' parameter is a typeless pointer in order to avoid */
|
|
|
1115 |
/* un-wanted dependencies on the rest of the FreeType code. In */
|
|
|
1116 |
/* practice, it is a QT_FT_Memory, i.e., a handle to the standard */
|
|
|
1117 |
/* FreeType memory allocator. However, this field can be completely */
|
|
|
1118 |
/* ignored by a given raster implementation. */
|
|
|
1119 |
/* */
|
|
|
1120 |
typedef int
|
|
|
1121 |
(*QT_FT_Raster_NewFunc)( void* memory,
|
|
|
1122 |
QT_FT_Raster* raster );
|
|
|
1123 |
|
|
|
1124 |
#define QT_FT_Raster_New_Func QT_FT_Raster_NewFunc
|
|
|
1125 |
|
|
|
1126 |
/*************************************************************************/
|
|
|
1127 |
/* */
|
|
|
1128 |
/* <FuncType> */
|
|
|
1129 |
/* QT_FT_Raster_DoneFunc */
|
|
|
1130 |
/* */
|
|
|
1131 |
/* <Description> */
|
|
|
1132 |
/* A function used to destroy a given raster object. */
|
|
|
1133 |
/* */
|
|
|
1134 |
/* <Input> */
|
|
|
1135 |
/* raster :: A handle to the raster object. */
|
|
|
1136 |
/* */
|
|
|
1137 |
typedef void
|
|
|
1138 |
(*QT_FT_Raster_DoneFunc)( QT_FT_Raster raster );
|
|
|
1139 |
|
|
|
1140 |
#define QT_FT_Raster_Done_Func QT_FT_Raster_DoneFunc
|
|
|
1141 |
|
|
|
1142 |
/*************************************************************************/
|
|
|
1143 |
/* */
|
|
|
1144 |
/* <FuncType> */
|
|
|
1145 |
/* QT_FT_Raster_ResetFunc */
|
|
|
1146 |
/* */
|
|
|
1147 |
/* <Description> */
|
|
|
1148 |
/* FreeType provides an area of memory called the `render pool', */
|
|
|
1149 |
/* available to all registered rasters. This pool can be freely used */
|
|
|
1150 |
/* during a given scan-conversion but is shared by all rasters. Its */
|
|
|
1151 |
/* content is thus transient. */
|
|
|
1152 |
/* */
|
|
|
1153 |
/* This function is called each time the render pool changes, or just */
|
|
|
1154 |
/* after a new raster object is created. */
|
|
|
1155 |
/* */
|
|
|
1156 |
/* <Input> */
|
|
|
1157 |
/* raster :: A handle to the new raster object. */
|
|
|
1158 |
/* */
|
|
|
1159 |
/* pool_base :: The address in memory of the render pool. */
|
|
|
1160 |
/* */
|
|
|
1161 |
/* pool_size :: The size in bytes of the render pool. */
|
|
|
1162 |
/* */
|
|
|
1163 |
/* <Note> */
|
|
|
1164 |
/* Rasters can ignore the render pool and rely on dynamic memory */
|
|
|
1165 |
/* allocation if they want to (a handle to the memory allocator is */
|
|
|
1166 |
/* passed to the raster constructor). However, this is not */
|
|
|
1167 |
/* recommended for efficiency purposes. */
|
|
|
1168 |
/* */
|
|
|
1169 |
typedef void
|
|
|
1170 |
(*QT_FT_Raster_ResetFunc)( QT_FT_Raster raster,
|
|
|
1171 |
unsigned char* pool_base,
|
|
|
1172 |
unsigned long pool_size );
|
|
|
1173 |
|
|
|
1174 |
#define QT_FT_Raster_Reset_Func QT_FT_Raster_ResetFunc
|
|
|
1175 |
|
|
|
1176 |
/*************************************************************************/
|
|
|
1177 |
/* */
|
|
|
1178 |
/* <FuncType> */
|
|
|
1179 |
/* QT_FT_Raster_SetModeFunc */
|
|
|
1180 |
/* */
|
|
|
1181 |
/* <Description> */
|
|
|
1182 |
/* This function is a generic facility to change modes or attributes */
|
|
|
1183 |
/* in a given raster. This can be used for debugging purposes, or */
|
|
|
1184 |
/* simply to allow implementation-specific `features' in a given */
|
|
|
1185 |
/* raster module. */
|
|
|
1186 |
/* */
|
|
|
1187 |
/* <Input> */
|
|
|
1188 |
/* raster :: A handle to the new raster object. */
|
|
|
1189 |
/* */
|
|
|
1190 |
/* mode :: A 4-byte tag used to name the mode or property. */
|
|
|
1191 |
/* */
|
|
|
1192 |
/* args :: A pointer to the new mode/property to use. */
|
|
|
1193 |
/* */
|
|
|
1194 |
typedef int
|
|
|
1195 |
(*QT_FT_Raster_SetModeFunc)( QT_FT_Raster raster,
|
|
|
1196 |
unsigned long mode,
|
|
|
1197 |
void* args );
|
|
|
1198 |
|
|
|
1199 |
#define QT_FT_Raster_Set_Mode_Func QT_FT_Raster_SetModeFunc
|
|
|
1200 |
|
|
|
1201 |
/*************************************************************************/
|
|
|
1202 |
/* */
|
|
|
1203 |
/* <FuncType> */
|
|
|
1204 |
/* QT_FT_Raster_RenderFunc */
|
|
|
1205 |
/* */
|
|
|
1206 |
/* <Description> */
|
|
|
1207 |
/* Invokes a given raster to scan-convert a given glyph image into a */
|
|
|
1208 |
/* target bitmap. */
|
|
|
1209 |
/* */
|
|
|
1210 |
/* <Input> */
|
|
|
1211 |
/* raster :: A handle to the raster object. */
|
|
|
1212 |
/* */
|
|
|
1213 |
/* params :: A pointer to a QT_FT_Raster_Params structure used to store */
|
|
|
1214 |
/* the rendering parameters. */
|
|
|
1215 |
/* */
|
|
|
1216 |
/* <Return> */
|
|
|
1217 |
/* Error code. 0 means success. */
|
|
|
1218 |
/* */
|
|
|
1219 |
/* <Note> */
|
|
|
1220 |
/* The exact format of the source image depends on the raster's glyph */
|
|
|
1221 |
/* format defined in its QT_FT_Raster_Funcs structure. It can be an */
|
|
|
1222 |
/* QT_FT_Outline or anything else in order to support a large array of */
|
|
|
1223 |
/* glyph formats. */
|
|
|
1224 |
/* */
|
|
|
1225 |
/* Note also that the render function can fail and return a */
|
|
|
1226 |
/* QT_FT_Err_Unimplemented_Feature error code if the raster used does */
|
|
|
1227 |
/* not support direct composition. */
|
|
|
1228 |
/* */
|
|
|
1229 |
/* XXX: For now, the standard raster doesn't support direct */
|
|
|
1230 |
/* composition but this should change for the final release (see */
|
|
|
1231 |
/* the files demos/src/ftgrays.c and demos/src/ftgrays2.c for */
|
|
|
1232 |
/* examples of distinct implementations which support direct */
|
|
|
1233 |
/* composition). */
|
|
|
1234 |
/* */
|
|
|
1235 |
typedef int
|
|
|
1236 |
(*QT_FT_Raster_RenderFunc)( QT_FT_Raster raster,
|
|
|
1237 |
QT_FT_Raster_Params* params );
|
|
|
1238 |
|
|
|
1239 |
#define QT_FT_Raster_Render_Func QT_FT_Raster_RenderFunc
|
|
|
1240 |
|
|
|
1241 |
/*************************************************************************/
|
|
|
1242 |
/* */
|
|
|
1243 |
/* <Struct> */
|
|
|
1244 |
/* QT_FT_Raster_Funcs */
|
|
|
1245 |
/* */
|
|
|
1246 |
/* <Description> */
|
|
|
1247 |
/* A structure used to describe a given raster class to the library. */
|
|
|
1248 |
/* */
|
|
|
1249 |
/* <Fields> */
|
|
|
1250 |
/* glyph_format :: The supported glyph format for this raster. */
|
|
|
1251 |
/* */
|
|
|
1252 |
/* raster_new :: The raster constructor. */
|
|
|
1253 |
/* */
|
|
|
1254 |
/* raster_reset :: Used to reset the render pool within the raster. */
|
|
|
1255 |
/* */
|
|
|
1256 |
/* raster_render :: A function to render a glyph into a given bitmap. */
|
|
|
1257 |
/* */
|
|
|
1258 |
/* raster_done :: The raster destructor. */
|
|
|
1259 |
/* */
|
|
|
1260 |
typedef struct QT_FT_Raster_Funcs_
|
|
|
1261 |
{
|
|
|
1262 |
QT_FT_Glyph_Format glyph_format;
|
|
|
1263 |
QT_FT_Raster_NewFunc raster_new;
|
|
|
1264 |
QT_FT_Raster_ResetFunc raster_reset;
|
|
|
1265 |
QT_FT_Raster_SetModeFunc raster_set_mode;
|
|
|
1266 |
QT_FT_Raster_RenderFunc raster_render;
|
|
|
1267 |
QT_FT_Raster_DoneFunc raster_done;
|
|
|
1268 |
|
|
|
1269 |
} QT_FT_Raster_Funcs;
|
|
|
1270 |
|
|
|
1271 |
|
|
|
1272 |
/* */
|
|
|
1273 |
|
|
|
1274 |
|
|
|
1275 |
QT_FT_END_HEADER
|
|
|
1276 |
|
|
|
1277 |
#endif /* __FTIMAGE_H__ */
|
|
|
1278 |
|
|
|
1279 |
|
|
|
1280 |
/* END */
|