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ef416fc2 | 1 | //======================================================================== |
2 | // | |
3 | // SplashXPathScanner.h | |
4 | // | |
5 | //======================================================================== | |
6 | ||
7 | #ifndef SPLASHXPATHSCANNER_H | |
8 | #define SPLASHXPATHSCANNER_H | |
9 | ||
10 | #include <config.h> | |
11 | ||
12 | #ifdef USE_GCC_PRAGMAS | |
13 | #pragma interface | |
14 | #endif | |
15 | ||
16 | #include "SplashTypes.h" | |
17 | ||
18 | class SplashXPath; | |
19 | struct SplashIntersect; | |
20 | ||
21 | //------------------------------------------------------------------------ | |
22 | // SplashXPathScanner | |
23 | //------------------------------------------------------------------------ | |
24 | ||
25 | class SplashXPathScanner { | |
26 | public: | |
27 | ||
28 | // Create a new SplashXPathScanner object. <xPathA> must be sorted. | |
29 | SplashXPathScanner(SplashXPath *xPathA, GBool eoA); | |
30 | ||
31 | ~SplashXPathScanner(); | |
32 | ||
33 | // Return the path's bounding box. | |
34 | void getBBox(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA) | |
35 | { *xMinA = xMin; *yMinA = yMin; *xMaxA = xMax; *yMaxA = yMax; } | |
36 | ||
37 | // Return the min/max x values for the span at <y>. | |
38 | void getSpanBounds(int y, int *spanXMin, int *spanXMax); | |
39 | ||
40 | // Returns true if (<x>,<y>) is inside the path. | |
41 | GBool test(int x, int y); | |
42 | ||
43 | // Returns true if the entire span ([<x0>,<x1>], <y>) is inside the | |
44 | // path. | |
45 | GBool testSpan(int x0, int x1, int y); | |
46 | ||
47 | // Returns the next span inside the path at <y>. If <y> is | |
48 | // different than the previous call to getNextSpan, this returns the | |
49 | // first span at <y>; otherwise it returns the next span (relative | |
50 | // to the previous call to getNextSpan). Returns false if there are | |
51 | // no more spans at <y>. | |
52 | GBool getNextSpan(int y, int *x0, int *x1); | |
53 | ||
54 | private: | |
55 | ||
56 | void computeIntersections(int y); | |
57 | ||
58 | SplashXPath *xPath; | |
59 | GBool eo; | |
60 | int xMin, yMin, xMax, yMax; | |
61 | ||
62 | int interY; // current y value | |
63 | int interIdx; // current index into <inter> - used by | |
64 | // getNextSpan | |
65 | int interCount; // current EO/NZWN counter - used by | |
66 | // getNextSpan | |
67 | int xPathIdx; // current index into <xPath> - used by | |
68 | // computeIntersections | |
69 | SplashIntersect *inter; // intersections array for <interY> | |
70 | int interLen; // number of intersections in <inter> | |
71 | int interSize; // size of the <inter> array | |
72 | }; | |
73 | ||
74 | #endif |