SkQuads.cpp File Reference

#include "src/base/SkQuads.h"
#include "include/private/base/SkAssert.h"
#include "include/private/base/SkFloatingPoint.h"
#include <cmath>
#include <limits>

Go to the source code of this file.

Functions
static int	solve_linear (const double M, const double B, double solution[2])
static bool	close_to_linear (double A, double B)
static double	zero_if_tiny (double x)

Function Documentation

close_to_linear()

static bool close_to_linear ( double  A, double  B  )

static

Definition at line 37 of file SkQuads.cpp.

                                                {
    if (A != 0) {
        // Return if B is much bigger than A.
        return std::abs(B / A) >= 1.0e+16;
    }
 
    // Otherwise A is zero, and the quadratic is linear.
    return true;
}

solve_linear()

static int solve_linear ( const double  M, const double  B, double  solution[2]  )

static

Definition at line 18 of file SkQuads.cpp.

                                                                            {
    if (sk_double_nearly_zero(M)) {
        solution[0] = 0;
        if (sk_double_nearly_zero(B)) {
            return 1;
        }
        return 0;
    }
    solution[0] = -B / M;
    if (!std::isfinite(solution[0])) {
        return 0;
    }
    return 1;
}

zero_if_tiny()

static double zero_if_tiny ( double  x )

static

Definition at line 131 of file SkQuads.cpp.

                                     {
    return sk_double_nearly_zero(x) ? 0 : x;
}