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.
107 lines
2.9 KiB
107 lines
2.9 KiB
//========================================================================
|
|
//
|
|
// SplashClip.h
|
|
//
|
|
//========================================================================
|
|
|
|
#ifndef SPLASHCLIP_H
|
|
#define SPLASHCLIP_H
|
|
|
|
#include <aconf.h>
|
|
|
|
#ifdef USE_GCC_PRAGMAS
|
|
#pragma interface
|
|
#endif
|
|
|
|
#include "SplashTypes.h"
|
|
#include "SplashMath.h"
|
|
|
|
class SplashPath;
|
|
class SplashXPath;
|
|
class SplashXPathScanner;
|
|
class SplashBitmap;
|
|
|
|
//------------------------------------------------------------------------
|
|
|
|
enum SplashClipResult {
|
|
splashClipAllInside,
|
|
splashClipAllOutside,
|
|
splashClipPartial
|
|
};
|
|
|
|
//------------------------------------------------------------------------
|
|
// SplashClip
|
|
//------------------------------------------------------------------------
|
|
|
|
class SplashClip {
|
|
public:
|
|
|
|
// Create a clip, for the given rectangle.
|
|
SplashClip(SplashCoord x0, SplashCoord y0,
|
|
SplashCoord x1, SplashCoord y1,
|
|
GBool antialiasA);
|
|
|
|
// Copy a clip.
|
|
SplashClip *copy() { return new SplashClip(this); }
|
|
|
|
~SplashClip();
|
|
|
|
// Reset the clip to a rectangle.
|
|
void resetToRect(SplashCoord x0, SplashCoord y0,
|
|
SplashCoord x1, SplashCoord y1);
|
|
|
|
// Intersect the clip with a rectangle.
|
|
SplashError clipToRect(SplashCoord x0, SplashCoord y0,
|
|
SplashCoord x1, SplashCoord y1);
|
|
|
|
// Interesect the clip with <path>.
|
|
SplashError clipToPath(SplashPath *path, SplashCoord *matrix,
|
|
SplashCoord flatness, GBool eo);
|
|
|
|
// Returns true if (<x>,<y>) is inside the clip.
|
|
GBool test(int x, int y);
|
|
|
|
// Tests a rectangle against the clipping region. Returns one of:
|
|
// - splashClipAllInside if the entire rectangle is inside the
|
|
// clipping region, i.e., all pixels in the rectangle are
|
|
// visible
|
|
// - splashClipAllOutside if the entire rectangle is outside the
|
|
// clipping region, i.e., all the pixels in the rectangle are
|
|
// clipped
|
|
// - splashClipPartial if the rectangle is part inside and part
|
|
// outside the clipping region
|
|
SplashClipResult testRect(int rectXMin, int rectYMin,
|
|
int rectXMax, int rectYMax);
|
|
|
|
// Similar to testRect, but tests a horizontal span.
|
|
SplashClipResult testSpan(int spanXMin, int spanXMax, int spanY);
|
|
|
|
// 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);
|
|
|
|
// Get the rectangle part of the clip region, in integer coordinates.
|
|
int getXMinI() { return xMinI; }
|
|
int getXMaxI() { return xMaxI; }
|
|
int getYMinI() { return yMinI; }
|
|
int getYMaxI() { return yMaxI; }
|
|
|
|
// Get the number of arbitrary paths used by the clip region.
|
|
int getNumPaths() { return length; }
|
|
|
|
private:
|
|
|
|
SplashClip(SplashClip *clip);
|
|
void grow(int nPaths);
|
|
|
|
GBool antialias;
|
|
SplashCoord xMin, yMin, xMax, yMax;
|
|
int xMinI, yMinI, xMaxI, yMaxI;
|
|
SplashXPath **paths;
|
|
Guchar *flags;
|
|
SplashXPathScanner **scanners;
|
|
int length, size;
|
|
};
|
|
|
|
#endif
|
|
|