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authorAkira Kakuto <kakuto@fuk.kindai.ac.jp>2019-05-03 06:39:31 +0000
committerAkira Kakuto <kakuto@fuk.kindai.ac.jp>2019-05-03 06:39:31 +0000
commit62f6586395e612102f14cfbf245d6b548a742bc2 (patch)
treed9977834ee380d9fc626694be3acdf0b810065f9 /Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c
parent8c0da66823797139402fc59a01132e71b54e97e6 (diff)
freetype-1.10.0
git-svn-id: svn://tug.org/texlive/trunk@50966 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c')
-rw-r--r--Build/source/libs/freetype2/freetype-src/src/base/ftbbox.c356
1 files changed, 186 insertions, 170 deletions
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 <ft2build.h>
@@ -61,26 +61,28 @@
( p->y < bbox.yMin || p->y > bbox.yMax )
- /*************************************************************************/
- /* */
- /* <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. */
- /* */
+ /**************************************************************************
+ *
+ * @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 @@
}
- /*************************************************************************/
- /* */
- /* <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. */
- /* */
+ /**************************************************************************
+ *
+ * @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 @@
}
- /*************************************************************************/
- /* */
- /* <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. */
- /* */
+ /**************************************************************************
+ *
+ * @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 @@
}
- /*************************************************************************/
- /* */
- /* <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. */
- /* */
+ /**************************************************************************
+ *
+ * @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 @@
}
- /*************************************************************************/
- /* */
- /* <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. */
- /* */
+ /**************************************************************************
+ *
+ * @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 @@
}
- /*************************************************************************/
- /* */
- /* <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. */
- /* */
+ /**************************************************************************
+ *
+ * @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;