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125 lines
3.4 KiB
125 lines
3.4 KiB
/**************************************************************************
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*
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* Copyright (c) 2000 Microsoft Corporation
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*
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* Module Name:
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*
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* End Cap Creator.
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*
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* Abstract:
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*
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* This module defines a class called GpEndCapCreator. This class is
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* responsible for constructing a path containing all the custom endcaps
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* and anchor endcaps for a given path. These are correctly transformed
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* and positioned.
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*
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* This class is used to create and position all the endcaps for a
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* given path and pen. This class is also responsible for trimming
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* the original path down so that it fits the end caps properly.
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* This class will handle all types of end caps except the base endcaps
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* (round, flat and triangle) which may be used as dash caps.
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* Caps that are handled are CustomCaps and the 3 Anchor caps (round,
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* diamond and arrow). Note that the round anchor cap is distinct from
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* the round base cap.
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*
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* Created:
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*
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* 10/09/2000 asecchia
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* Created it.
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*
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**************************************************************************/
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#ifndef _ENDCAP_HPP
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#define _ENDCAP_HPP
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class GpEndCapCreator
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{
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public:
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GpEndCapCreator(
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GpPath *path,
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DpPen *pen,
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const GpMatrix *m,
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REAL dpi_x,
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REAL dpi_y,
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bool antialias
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);
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~GpEndCapCreator();
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GpStatus CreateCapPath(GpPath **caps);
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static bool PenNeedsEndCapCreator(const DpPen *pen);
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protected:
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GpStatus GetCapsForSubpath(
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GpPath **startCapPath,
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GpPath **endCapPath,
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GpPointF *centerPoints,
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BYTE *centerTypes,
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INT centerCount
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);
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GpStatus SetCustomStrokeCaps(
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GpCustomLineCap* customStartCap,
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GpCustomLineCap* customEndCap,
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const GpPointF& startPoint,
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const GpPointF& endPoint,
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const GpPointF *centerPoints,
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const BYTE *centerTypes,
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INT centerPointCount,
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DynPointFArray *startCapPoints,
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DynPointFArray *endCapPoints,
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DynByteArray *startCapTypes,
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DynByteArray *endCapTypes
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);
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GpStatus SetCustomFillCaps(
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GpCustomLineCap* customStartCap,
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GpCustomLineCap* customEndCap,
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const GpPointF& startPoint,
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const GpPointF& endPoint,
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const GpPointF *centerPoints,
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const BYTE *centerTypes,
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INT centerPointCount,
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DynPointFArray *startCapPoints,
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DynPointFArray *endCapPoints,
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DynByteArray *startCapTypes,
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DynByteArray *endCapTypes
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);
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void ComputeCapGradient(
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GpIterator<GpPointF> &pointIterator,
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BYTE *types,
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IN REAL lengthSquared,
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IN REAL baseInset,
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OUT GpVector2D *grad
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);
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VOID PrepareDpPenForCustomCap(
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DpPen* pen,
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const GpCustomLineCap* customCap
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) const;
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static GpCustomLineCap *ReferenceArrowAnchor();
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static GpCustomLineCap *ReferenceDiamondAnchor();
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static GpCustomLineCap *ReferenceRoundAnchor();
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static GpCustomLineCap *ReferenceSquareAnchor();
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// Data member variables.
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GpPath *Path;
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DpPen *Pen;
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GpMatrix XForm;
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bool Antialias;
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GpCustomLineCap *StartCap;
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GpCustomLineCap *EndCap;
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// Note that the widener doesn't use these, so we should actually remove
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// this and the parameters to the widener.
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REAL DpiX, DpiY;
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};
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#endif
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