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121 lines
3.3 KiB
121 lines
3.3 KiB
//========================================================================
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//
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// SplashPath.h
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//
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//========================================================================
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#ifndef SPLASHPATH_H
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#define SPLASHPATH_H
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#include <aconf.h>
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#ifdef USE_GCC_PRAGMAS
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#pragma interface
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#endif
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#include "SplashTypes.h"
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//------------------------------------------------------------------------
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// SplashPathPoint
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//------------------------------------------------------------------------
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struct SplashPathPoint {
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SplashCoord x, y;
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};
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//------------------------------------------------------------------------
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// SplashPath.flags
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//------------------------------------------------------------------------
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// first point on each subpath sets this flag
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#define splashPathFirst 0x01
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// last point on each subpath sets this flag
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#define splashPathLast 0x02
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// if the subpath is closed, its first and last points must be
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// identical, and must set this flag
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#define splashPathClosed 0x04
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// curve control points set this flag
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#define splashPathCurve 0x08
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//------------------------------------------------------------------------
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// SplashPathHint
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//------------------------------------------------------------------------
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struct SplashPathHint {
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int ctrl0, ctrl1;
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int firstPt, lastPt;
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};
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//------------------------------------------------------------------------
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// SplashPath
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//------------------------------------------------------------------------
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class SplashPath {
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public:
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// Create an empty path.
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SplashPath();
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// Copy a path.
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SplashPath *copy() { return new SplashPath(this); }
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~SplashPath();
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// Append <path> to <this>.
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void append(SplashPath *path);
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// Start a new subpath.
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SplashError moveTo(SplashCoord x, SplashCoord y);
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// Add a line segment to the last subpath.
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SplashError lineTo(SplashCoord x, SplashCoord y);
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// Add a third-order (cubic) Bezier curve segment to the last
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// subpath.
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SplashError curveTo(SplashCoord x1, SplashCoord y1,
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SplashCoord x2, SplashCoord y2,
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SplashCoord x3, SplashCoord y3);
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// Close the last subpath, adding a line segment if necessary.
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SplashError close();
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// Add a stroke adjustment hint. The controlling segments are
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// <ctrl0> and <ctrl1> (where segments are identified by their first
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// point), and the points to be adjusted are <firstPt> .. <lastPt>.
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void addStrokeAdjustHint(int ctrl0, int ctrl1, int firstPt, int lastPt);
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// Add (<dx>, <dy>) to every point on this path.
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void offset(SplashCoord dx, SplashCoord dy);
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// Get the points on the path.
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int getLength() { return length; }
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void getPoint(int i, double *x, double *y, Guchar *f)
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{ *x = pts[i].x; *y = pts[i].y; *f = flags[i]; }
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// Get the current point.
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GBool getCurPt(SplashCoord *x, SplashCoord *y);
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private:
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SplashPath(SplashPath *path);
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void grow(int nPts);
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GBool noCurrentPoint() { return curSubpath == length; }
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GBool onePointSubpath() { return curSubpath == length - 1; }
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GBool openSubpath() { return curSubpath < length - 1; }
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SplashPathPoint *pts; // array of points
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Guchar *flags; // array of flags
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int length, size; // length/size of the pts and flags arrays
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int curSubpath; // index of first point in last subpath
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SplashPathHint *hints; // list of hints
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int hintsLength, hintsSize;
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friend class SplashXPath;
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friend class Splash;
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};
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#endif
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