You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.6 KiB
88 lines
2.6 KiB
15 years ago
|
//========================================================================
|
||
|
|
//
|
||
|
|
// SplashXPathScanner.h
|
||
|
|
//
|
||
|
|
//========================================================================
|
||
|
|
|
||
|
|
#ifndef SPLASHXPATHSCANNER_H
|
||
|
|
#define SPLASHXPATHSCANNER_H
|
||
|
|
|
||
|
|
#include <aconf.h>
|
||
|
|
|
||
|
|
#ifdef USE_GCC_PRAGMAS
|
||
|
|
#pragma interface
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "SplashTypes.h"
|
||
|
|
|
||
|
|
class SplashXPath;
|
||
|
|
class SplashBitmap;
|
||
|
|
struct SplashIntersect;
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
// SplashXPathScanner
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
|
||
|
|
class SplashXPathScanner {
|
||
|
|
public:
|
||
|
|
|
||
|
|
// Create a new SplashXPathScanner object. <xPathA> must be sorted.
|
||
|
|
SplashXPathScanner(SplashXPath *xPathA, GBool eoA);
|
||
|
|
|
||
|
|
~SplashXPathScanner();
|
||
|
|
|
||
|
|
// Return the path's bounding box.
|
||
|
|
void getBBox(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA)
|
||
|
|
{ *xMinA = xMin; *yMinA = yMin; *xMaxA = xMax; *yMaxA = yMax; }
|
||
|
|
|
||
|
|
// Return the path's bounding box.
|
||
|
|
void getBBoxAA(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA);
|
||
|
|
|
||
|
|
// Return the min/max x values for the span at <y>.
|
||
|
|
void getSpanBounds(int y, int *spanXMin, int *spanXMax);
|
||
|
|
|
||
|
|
// Returns true if (<x>,<y>) is inside the path.
|
||
|
|
GBool test(int x, int y);
|
||
|
|
|
||
|
|
// Returns true if the entire span ([<x0>,<x1>], <y>) is inside the
|
||
|
|
// path.
|
||
|
|
GBool testSpan(int x0, int x1, int y);
|
||
|
|
|
||
|
|
// Returns the next span inside the path at <y>. If <y> is
|
||
|
|
// different than the previous call to getNextSpan, this returns the
|
||
|
|
// first span at <y>; otherwise it returns the next span (relative
|
||
|
|
// to the previous call to getNextSpan). Returns false if there are
|
||
|
|
// no more spans at <y>.
|
||
|
|
GBool getNextSpan(int y, int *x0, int *x1);
|
||
|
|
|
||
|
|
// Renders one anti-aliased line into <aaBuf>. Returns the min and
|
||
|
|
// max x coordinates with non-zero pixels in <x0> and <x1>.
|
||
|
|
void renderAALine(SplashBitmap *aaBuf, int *x0, int *x1, int y);
|
||
|
|
|
||
|
|
// Clips an anti-aliased line by setting pixels to zero. On entry,
|
||
|
|
// all non-zero pixels are between <x0> and <x1>. This function
|
||
|
|
// will update <x0> and <x1>.
|
||
|
|
void clipAALine(SplashBitmap *aaBuf, int *x0, int *x1, int y);
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
void computeIntersections(int y);
|
||
|
|
|
||
|
|
SplashXPath *xPath;
|
||
|
|
GBool eo;
|
||
|
|
int xMin, yMin, xMax, yMax;
|
||
|
|
|
||
|
|
int interY; // current y value
|
||
|
|
int interIdx; // current index into <inter> - used by
|
||
|
|
// getNextSpan
|
||
|
|
int interCount; // current EO/NZWN counter - used by
|
||
|
|
// getNextSpan
|
||
|
|
int xPathIdx; // current index into <xPath> - used by
|
||
|
|
// computeIntersections
|
||
|
|
SplashIntersect *inter; // intersections array for <interY>
|
||
|
|
int interLen; // number of intersections in <inter>
|
||
|
|
int interSize; // size of the <inter> array
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|