晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/include/ImageMagick-6/magick/draw.h
/*
  Copyright 1999 ImageMagick Studio LLC, a non-profit organization
  dedicated to making software imaging solutions freely available.

  You may not use this file except in compliance with the License.  You may
  obtain a copy of the License at

    https://imagemagick.org/script/license.php

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

  MagickCore drawing methods.
*/
#ifndef MAGICKCORE_DRAW_H
#define MAGICKCORE_DRAW_H

#include "magick/geometry.h"
#include "magick/image.h"
#include "magick/pixel.h"
#include "magick/type.h"
#include "magick/color.h"

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

typedef enum
{
  UndefinedAlign,
  LeftAlign,
  CenterAlign,
  RightAlign
} AlignType;

typedef enum
{
  UndefinedPathUnits,
  UserSpace,
  UserSpaceOnUse,
  ObjectBoundingBox
} ClipPathUnits;

typedef enum
{
  UndefinedDecoration,
  NoDecoration,
  UnderlineDecoration,
  OverlineDecoration,
  LineThroughDecoration
} DecorationType;

typedef enum
{
  UndefinedDirection,
  RightToLeftDirection,
  LeftToRightDirection,
  TopToBottomDirection
} DirectionType;

typedef enum
{
  UndefinedRule,
#undef EvenOddRule
  EvenOddRule,
  NonZeroRule
} FillRule;

typedef enum
{
  UndefinedGradient,
  LinearGradient,
  RadialGradient
} GradientType;

typedef enum
{
  UndefinedCap,
  ButtCap,
  RoundCap,
  SquareCap
} LineCap;

typedef enum
{
  UndefinedJoin,
  MiterJoin,
  RoundJoin,
  BevelJoin
} LineJoin;

typedef enum
{
  UndefinedMethod,
  PointMethod,
  ReplaceMethod,
  FloodfillMethod,
  FillToBorderMethod,
  ResetMethod
} PaintMethod;

typedef enum
{
  UndefinedPrimitive,
  PointPrimitive,
  LinePrimitive,
  RectanglePrimitive,
  RoundRectanglePrimitive,
  ArcPrimitive,
  EllipsePrimitive,
  CirclePrimitive,
  PolylinePrimitive,
  PolygonPrimitive,
  BezierPrimitive,
  ColorPrimitive,
  MattePrimitive,
  TextPrimitive,
  ImagePrimitive,
  PathPrimitive
} PrimitiveType;

typedef enum
{
  UndefinedReference,
  GradientReference
} ReferenceType;

typedef enum
{
  UndefinedSpread,
  PadSpread,
  ReflectSpread,
  RepeatSpread
} SpreadMethod;

typedef struct _PointInfo
{
  double
    x,
    y;
} PointInfo;

typedef struct _StopInfo
{
  MagickPixelPacket
    color;

  MagickRealType
    offset;
} StopInfo;

typedef struct _GradientInfo
{
  GradientType
    type;

  RectangleInfo
    bounding_box;

  SegmentInfo
    gradient_vector;

  StopInfo
    *stops;

  size_t
    number_stops;

  SpreadMethod
    spread;

  MagickBooleanType
    debug;

  size_t
    signature;

  PointInfo
    center;

  MagickRealType
    radius,
    angle;

  PointInfo
    radii;
} GradientInfo;

typedef struct _ElementReference
{
  char
    *id;

  ReferenceType
    type;

  GradientInfo
    gradient;

  size_t
    signature;

  struct _ElementReference
    *previous,
    *next;
} ElementReference;

typedef struct _DrawInfo
{
  char
    *primitive,
    *geometry;

  RectangleInfo
    viewbox;

  AffineMatrix
    affine;

  GravityType
    gravity;

  PixelPacket
    fill,
    stroke;

  double
    stroke_width;

  GradientInfo
    gradient;

  Image
    *fill_pattern,
    *tile,
    *stroke_pattern;

  MagickBooleanType
    stroke_antialias,
    text_antialias;

  FillRule
    fill_rule;

  LineCap
    linecap;

  LineJoin
    linejoin;

  size_t
    miterlimit;

  double
    dash_offset;

  DecorationType
    decorate;

  CompositeOperator
    compose;

  char
    *text;

  size_t
    face;

  char
    *font,
    *metrics,
    *family;

  StyleType
    style;

  StretchType
    stretch;

  size_t
    weight;

  char
    *encoding;

  double
    pointsize;

  char
    *density;

  AlignType
    align;

  PixelPacket
    undercolor,
    border_color;

  char
    *server_name;

  double
    *dash_pattern;

  char
    *clip_mask;

  SegmentInfo
    bounds;

  ClipPathUnits
    clip_units;

  Quantum
    opacity;

  MagickBooleanType
    render;

  ElementReference
    element_reference;

  MagickBooleanType
    debug;

  size_t
    signature;

  double
    kerning,
    interword_spacing,
    interline_spacing;

  DirectionType
    direction;

  double
    fill_opacity,
    stroke_opacity;

  MagickBooleanType
    clip_path;

  Image
    *clipping_mask;

  ComplianceType
    compliance;

  Image
    *composite_mask;

  char
    *id;

  ImageInfo
    *image_info;
} DrawInfo;

typedef struct _PrimitiveInfo
{
  PointInfo
    point;

  size_t
    coordinates;

  PrimitiveType
    primitive;

  PaintMethod
    method;

  char
    *text;

  MagickBooleanType
    closed_subpath;
} PrimitiveInfo;

typedef struct _TypeMetric
{
  PointInfo
    pixels_per_em;

  double
    ascent,
    descent,
    width,
    height,
    max_advance,
    underline_position,
    underline_thickness;

  SegmentInfo
    bounds;

  PointInfo
    origin;
} TypeMetric;

extern MagickExport DrawInfo
  *AcquireDrawInfo(void),
  *CloneDrawInfo(const ImageInfo *,const DrawInfo *),
  *DestroyDrawInfo(DrawInfo *);

extern MagickExport MagickBooleanType
  DrawAffineImage(Image *,const Image *,const AffineMatrix *),
  DrawClipPath(Image *,const DrawInfo *,const char *),
  DrawGradientImage(Image *,const DrawInfo *),
  DrawImage(Image *,const DrawInfo *),
  DrawPatternPath(Image *,const DrawInfo *,const char *,Image **),
  DrawPrimitive(Image *,const DrawInfo *,const PrimitiveInfo *);

extern MagickExport void
  GetAffineMatrix(AffineMatrix *),
  GetDrawInfo(const ImageInfo *,DrawInfo *);

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif

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