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//========================================================================
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// SplashXPathScanner.h
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//========================================================================
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#ifndef SPLASHXPATHSCANNER_H
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#define SPLASHXPATHSCANNER_H
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#ifdef USE_GCC_PRAGMAS
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#include "SplashTypes.h"
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struct SplashIntersect;
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//------------------------------------------------------------------------
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//------------------------------------------------------------------------
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class SplashXPathScanner {
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// Create a new SplashXPathScanner object. <xPathA> must be sorted.
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SplashXPathScanner(SplashXPath *xPathA, GBool eoA);
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~SplashXPathScanner();
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// Return the path's bounding box.
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void getBBox(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA)
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{ *xMinA = xMin; *yMinA = yMin; *xMaxA = xMax; *yMaxA = yMax; }
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// Return the path's bounding box.
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void getBBoxAA(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA);
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// Return the min/max x values for the span at <y>.
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void getSpanBounds(int y, int *spanXMin, int *spanXMax);
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// Returns true if (<x>,<y>) is inside the path.
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GBool test(int x, int y);
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// Returns true if the entire span ([<x0>,<x1>], <y>) is inside the
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GBool testSpan(int x0, int x1, int y);
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// Returns the next span inside the path at <y>. If <y> is
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// different than the previous call to getNextSpan, this returns the
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// first span at <y>; otherwise it returns the next span (relative
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// to the previous call to getNextSpan). Returns false if there are
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// no more spans at <y>.
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GBool getNextSpan(int y, int *x0, int *x1);
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// Renders one anti-aliased line into <aaBuf>. Returns the min and
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// max x coordinates with non-zero pixels in <x0> and <x1>.
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void renderAALine(SplashBitmap *aaBuf, int *x0, int *x1, int y);
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// Clips an anti-aliased line by setting pixels to zero. On entry,
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// all non-zero pixels are between <x0> and <x1>. This function
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// will update <x0> and <x1>.
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void clipAALine(SplashBitmap *aaBuf, int *x0, int *x1, int y);
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void computeIntersections(int y);
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int xMin, yMin, xMax, yMax;
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int interY; // current y value
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int interIdx; // current index into <inter> - used by
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int interCount; // current EO/NZWN counter - used by
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int xPathIdx; // current index into <xPath> - used by
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// computeIntersections
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SplashIntersect *inter; // intersections array for <interY>
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int interLen; // number of intersections in <inter>
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int interSize; // size of the <inter> array
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lib/pdf/xpdf/SplashXPathScanner.h
