SkRasterClip.cpp File Reference

#include "src/core/SkRasterClip.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkClipOp.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPath.h"
#include "include/core/SkScalar.h"
#include "include/private/base/SkDebug.h"
#include "src/core/SkRegionPriv.h"

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Functions
static bool	nearly_integral (SkScalar x)

Function Documentation

nearly_integral()

static bool nearly_integral ( SkScalar  x )

static

Our antialiasing currently has a granularity of 1/4 of a pixel along each axis. Thus we can treat an axis coordinate as an integer if it differs from its nearest int by < half of that value (1/8 in this case).

Definition at line 144 of file SkRasterClip.cpp.

                                        {
    static const SkScalar domain = SK_Scalar1 / 4;
    static const SkScalar halfDomain = domain / 2;
 
    x += halfDomain;
    return x - SkScalarFloorToScalar(x) < domain;
}