From 62f6586395e612102f14cfbf245d6b548a742bc2 Mon Sep 17 00:00:00 2001 From: Akira Kakuto Date: Fri, 3 May 2019 06:39:31 +0000 Subject: freetype-1.10.0 git-svn-id: svn://tug.org/texlive/trunk@50966 c570f23f-e606-0410-a88d-b1316a301751 --- .../libs/freetype2/freetype-src/src/base/ftbbox.c | 356 +++++++++++---------- 1 file changed, 186 insertions(+), 170 deletions(-) (limited to 'Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c') diff --git a/Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c b/Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c index 151e85c97a5..0b04fde6359 100644 --- a/Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c +++ b/Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c @@ -1,27 +1,27 @@ -/***************************************************************************/ -/* */ -/* ftbbox.c */ -/* */ -/* FreeType bbox computation (body). */ -/* */ -/* Copyright 1996-2018 by */ -/* David Turner, Robert Wilhelm, and Werner Lemberg. */ -/* */ -/* This file is part of the FreeType project, and may only be used */ -/* modified and distributed under the terms of the FreeType project */ -/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ -/* this file you indicate that you have read the license and */ -/* understand and accept it fully. */ -/* */ -/***************************************************************************/ - - - /*************************************************************************/ - /* */ - /* This component has a _single_ role: to compute exact outline bounding */ - /* boxes. */ - /* */ - /*************************************************************************/ +/**************************************************************************** + * + * ftbbox.c + * + * FreeType bbox computation (body). + * + * Copyright (C) 1996-2019 by + * David Turner, Robert Wilhelm, and Werner Lemberg. + * + * This file is part of the FreeType project, and may only be used + * modified and distributed under the terms of the FreeType project + * license, LICENSE.TXT. By continuing to use, modify, or distribute + * this file you indicate that you have read the license and + * understand and accept it fully. + * + */ + + + /************************************************************************** + * + * This component has a _single_ role: to compute exact outline bounding + * boxes. + * + */ #include @@ -61,26 +61,28 @@ ( p->y < bbox.yMin || p->y > bbox.yMax ) - /*************************************************************************/ - /* */ - /* */ - /* BBox_Move_To */ - /* */ - /* */ - /* This function is used as a `move_to' emitter during */ - /* FT_Outline_Decompose(). It simply records the destination point */ - /* in `user->last'. We also update bbox in case contour starts with */ - /* an implicit `on' point. */ - /* */ - /* */ - /* to :: A pointer to the destination vector. */ - /* */ - /* */ - /* user :: A pointer to the current walk context. */ - /* */ - /* */ - /* Always 0. Needed for the interface only. */ - /* */ + /************************************************************************** + * + * @Function: + * BBox_Move_To + * + * @Description: + * This function is used as a `move_to' emitter during + * FT_Outline_Decompose(). It simply records the destination point + * in `user->last'. We also update bbox in case contour starts with + * an implicit `on' point. + * + * @Input: + * to :: + * A pointer to the destination vector. + * + * @InOut: + * user :: + * A pointer to the current walk context. + * + * @Return: + * Always 0. Needed for the interface only. + */ static int BBox_Move_To( FT_Vector* to, TBBox_Rec* user ) @@ -93,26 +95,28 @@ } - /*************************************************************************/ - /* */ - /* */ - /* BBox_Line_To */ - /* */ - /* */ - /* This function is used as a `line_to' emitter during */ - /* FT_Outline_Decompose(). It simply records the destination point */ - /* in `user->last'; no further computations are necessary because */ - /* bbox already contains both explicit ends of the line segment. */ - /* */ - /* */ - /* to :: A pointer to the destination vector. */ - /* */ - /* */ - /* user :: A pointer to the current walk context. */ - /* */ - /* */ - /* Always 0. Needed for the interface only. */ - /* */ + /************************************************************************** + * + * @Function: + * BBox_Line_To + * + * @Description: + * This function is used as a `line_to' emitter during + * FT_Outline_Decompose(). It simply records the destination point + * in `user->last'; no further computations are necessary because + * bbox already contains both explicit ends of the line segment. + * + * @Input: + * to :: + * A pointer to the destination vector. + * + * @InOut: + * user :: + * A pointer to the current walk context. + * + * @Return: + * Always 0. Needed for the interface only. + */ static int BBox_Line_To( FT_Vector* to, TBBox_Rec* user ) @@ -123,28 +127,33 @@ } - /*************************************************************************/ - /* */ - /* */ - /* BBox_Conic_Check */ - /* */ - /* */ - /* Find the extrema of a 1-dimensional conic Bezier curve and update */ - /* a bounding range. This version uses direct computation, as it */ - /* doesn't need square roots. */ - /* */ - /* */ - /* y1 :: The start coordinate. */ - /* */ - /* y2 :: The coordinate of the control point. */ - /* */ - /* y3 :: The end coordinate. */ - /* */ - /* */ - /* min :: The address of the current minimum. */ - /* */ - /* max :: The address of the current maximum. */ - /* */ + /************************************************************************** + * + * @Function: + * BBox_Conic_Check + * + * @Description: + * Find the extrema of a 1-dimensional conic Bezier curve and update + * a bounding range. This version uses direct computation, as it + * doesn't need square roots. + * + * @Input: + * y1 :: + * The start coordinate. + * + * y2 :: + * The coordinate of the control point. + * + * y3 :: + * The end coordinate. + * + * @InOut: + * min :: + * The address of the current minimum. + * + * max :: + * The address of the current maximum. + */ static void BBox_Conic_Check( FT_Pos y1, FT_Pos y2, @@ -168,32 +177,35 @@ } - /*************************************************************************/ - /* */ - /* */ - /* BBox_Conic_To */ - /* */ - /* */ - /* This function is used as a `conic_to' emitter during */ - /* FT_Outline_Decompose(). It checks a conic Bezier curve with the */ - /* current bounding box, and computes its extrema if necessary to */ - /* update it. */ - /* */ - /* */ - /* control :: A pointer to a control point. */ - /* */ - /* to :: A pointer to the destination vector. */ - /* */ - /* */ - /* user :: The address of the current walk context. */ - /* */ - /* */ - /* Always 0. Needed for the interface only. */ - /* */ - /* */ - /* In the case of a non-monotonous arc, we compute directly the */ - /* extremum coordinates, as it is sufficiently fast. */ - /* */ + /************************************************************************** + * + * @Function: + * BBox_Conic_To + * + * @Description: + * This function is used as a `conic_to' emitter during + * FT_Outline_Decompose(). It checks a conic Bezier curve with the + * current bounding box, and computes its extrema if necessary to + * update it. + * + * @Input: + * control :: + * A pointer to a control point. + * + * to :: + * A pointer to the destination vector. + * + * @InOut: + * user :: + * The address of the current walk context. + * + * @Return: + * Always 0. Needed for the interface only. + * + * @Note: + * In the case of a non-monotonous arc, we compute directly the + * extremum coordinates, as it is sufficiently fast. + */ static int BBox_Conic_To( FT_Vector* control, FT_Vector* to, @@ -222,30 +234,36 @@ } - /*************************************************************************/ - /* */ - /* */ - /* BBox_Cubic_Check */ - /* */ - /* */ - /* Find the extrema of a 1-dimensional cubic Bezier curve and */ - /* update a bounding range. This version uses iterative splitting */ - /* because it is faster than the exact solution with square roots. */ - /* */ - /* */ - /* p1 :: The start coordinate. */ - /* */ - /* p2 :: The coordinate of the first control point. */ - /* */ - /* p3 :: The coordinate of the second control point. */ - /* */ - /* p4 :: The end coordinate. */ - /* */ - /* */ - /* min :: The address of the current minimum. */ - /* */ - /* max :: The address of the current maximum. */ - /* */ + /************************************************************************** + * + * @Function: + * BBox_Cubic_Check + * + * @Description: + * Find the extrema of a 1-dimensional cubic Bezier curve and + * update a bounding range. This version uses iterative splitting + * because it is faster than the exact solution with square roots. + * + * @Input: + * p1 :: + * The start coordinate. + * + * p2 :: + * The coordinate of the first control point. + * + * p3 :: + * The coordinate of the second control point. + * + * p4 :: + * The end coordinate. + * + * @InOut: + * min :: + * The address of the current minimum. + * + * max :: + * The address of the current maximum. + */ static FT_Pos cubic_peak( FT_Pos q1, FT_Pos q2, @@ -361,34 +379,38 @@ } - /*************************************************************************/ - /* */ - /* */ - /* BBox_Cubic_To */ - /* */ - /* */ - /* This function is used as a `cubic_to' emitter during */ - /* FT_Outline_Decompose(). It checks a cubic Bezier curve with the */ - /* current bounding box, and computes its extrema if necessary to */ - /* update it. */ - /* */ - /* */ - /* control1 :: A pointer to the first control point. */ - /* */ - /* control2 :: A pointer to the second control point. */ - /* */ - /* to :: A pointer to the destination vector. */ - /* */ - /* */ - /* user :: The address of the current walk context. */ - /* */ - /* */ - /* Always 0. Needed for the interface only. */ - /* */ - /* */ - /* In the case of a non-monotonous arc, we don't compute directly */ - /* extremum coordinates, we subdivide instead. */ - /* */ + /************************************************************************** + * + * @Function: + * BBox_Cubic_To + * + * @Description: + * This function is used as a `cubic_to' emitter during + * FT_Outline_Decompose(). It checks a cubic Bezier curve with the + * current bounding box, and computes its extrema if necessary to + * update it. + * + * @Input: + * control1 :: + * A pointer to the first control point. + * + * control2 :: + * A pointer to the second control point. + * + * to :: + * A pointer to the destination vector. + * + * @InOut: + * user :: + * The address of the current walk context. + * + * @Return: + * Always 0. Needed for the interface only. + * + * @Note: + * In the case of a non-monotonous arc, we don't compute directly + * extremum coordinates, we subdivide instead. + */ static int BBox_Cubic_To( FT_Vector* control1, FT_Vector* control2, @@ -490,12 +512,6 @@ FT_Error error; TBBox_Rec user; -#ifdef FT_CONFIG_OPTION_PIC - FT_Outline_Funcs bbox_interface; - - - Init_Class_bbox_interface( &bbox_interface ); -#endif user.bbox = bbox; -- cgit v1.2.3