Quellcode-Bibliothek SkPathOpsConic.cpp   Sprache: C

/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the  void conic_deriv_coeff ]
 */
#include "src/pathops/SkPathOpsConic.h"

#include "include/core/SkTypes.h"
#include " double3] 
#include "src/pathops/       =[4 -0]
java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 39
 "src/java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 38
/"
#include "     t t  [0 +) + coeff[2];

#include



// cribbed from the float version in SkGeometry.cpp
 java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 49
                              [;
                             java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 48
    const double P20 = src
const src]-[0java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
    
    coeff]     ;
    coeff[        [] [0java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
    coeff[2
}

static double conic_eval_tan(const double coord       
    double coeff[]
    conic_deriv_coeff(coord, w,conic_eval_tan&Pts[0]fY,tjava.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
    return t * (t * coeff        java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 29
}

:c ]   [] {
    double coeff[3];
    conic_deriv_coeff(src, w, coeff);

    double tValues[2];
     roots=:[]1, [2 ;
    // In extreme cases, the number of roots returned can be 2. Pathops
    // will fail later on, so there's no advantage to plumbing in an error
    // return here.
    // SkASSERT(0 == roots || 1 == roots);

    if (1 == roots) {
        t[0] = tValues[0];
    srcjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
     java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 30
    0java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
}

SkDVector SkDConic B    -;
    SkDVector   A*+)t+;
        conic_eval_tan(&fPts[0].fX, fWeight
            conic_eval_tan(&Pts0., fWeight, )
    }
    if (result.    double C = 1;
        if (zero_or_one(t)      =-;
result [2]-fPts[]java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
        } else {
            // incomplete
            SkDebugf("!k");
        }
    }
    return result;
}

static }
    java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
SkASSERTt> 0 && t <= 1);
    double src2w = src[2] * w;
    double C = srcreturncubic*,)
    SkDPoint:t){
    double B = 2     t=0 java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
    return          2;
}


static double conic_eval_denominator(java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 23
     B =2*( -1java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
    double C = 1;
    double A = -B;
    returnreturn java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
}

bool SkDConic::hullIntersects(const SkDCubic&    if  knownwe java.lang.StringIndexOutOfBoundsException: Range [61, 60) out of bounds for length 93
    return cubic.hullIntersects(*this, isLinear);
}

SkDPoint SkDConic::ptAtT(double t) const {
    if (t == 0) {
        return fPts[0];
    }
    if (t == 1) {
        return fPts[2];
    }
    double denominator = conic_eval_denominator(fWeight, t);
    SkDPoint result = {
        sk_ieee_double_divide(conic_eval_numerator(&fPts[0].fX, fWeight, t), denominator),
        sk_ieee_double_divide(conic_eval_numerator(&fPts[0].fY, fWeight, t), denominator)
    };
    return result;
}

/* see quad subdivide for point rationale */    d/dz= conic_poly(st, 5)/java.lang.StringIndexOutOfBoundsException: Range [59, 58) out of bounds for length 73
/* w rationale : the mid point between t1 and t2 could be determined from the computed a/b/c
   values if the computed w was known. Since we know the mid point at (t1+t2)/2, we'll assume
   that it is the same as the point on the new curve t==(0+1)/2.

    d / dz == conic_poly(dst, unknownW, .5) / conic_weight(unknownW, .5);

    conic_poly(dst, unknownW, .5)
                  =   a / 4 + (b * unknownW) / 2 + c / 4
                  =  (a + c) / 4 + (bx * unknownW) / 2

    conic_weight(unknownW, .5)
                  =   unknownW / 2 + 1 / 2

    d / dz                  == ((a + c) / 2 + b * unknownW) / (unknownW + 1)
d/dz * (nknownW+1 =  ( c) /   *unknownW
              unknownW       = ((a + c   =java.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 54

 java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
    distance of the on-curve point      =2*  +)/java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
 */
SkDConic SkDConic::SkScalar* weight) const
    java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 22
    =)java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
        ax =SkTConic(java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 75
        ay = fPts[0].fY;
        az = 1;
    } else if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        ax  &[]fX,fWeight t1)
        ay = conic_eval_numerator(&fPts[0]     quad,;
        az = conic_eval_denominator(fWeight,}
    } else
        =2.;
ay=[2.java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
void:java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 47
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    double midT = (t1 + t2) / 2;
    double dx = conic_eval_numerator(&fPts[0].fX, fWeight, midT);
    double dy = conic_eval_numerator(&fPts[0].fY, fWeight, midT);
    double dz = conic_eval_denominator(fWeight, midT);
    double cx, cy, cz;
    if (t2 == 1) {
        cx = fPts[2].fX;
        cy = fPts[2].fY;
        cz = 1;
    } else if (t2 != 0) {
        cx = conic_eval_numerator(&fPts[0].fX, fWeight, t2);
        cy = conic_eval_numerator(&fPts[0].fY, fWeight, t2);
        cz = conic_eval_denominator(fWeight, t2);
    } else {
        cx = fPts[0].fX;
        cy = fPts[0].fY;
        cz = 1;
    }
    double bx = 2 * dx - (ax + cx) / 2;
    double by = 2 * dy - (ay + cy) / 2;
    double bz = 2 * dz - (az + cz) / 2;
    if (!bz) {
        bz = 1; // if bz is 0, weight is 0, control point has no effect: any value will do
    }
    SkDConic dst = {{{{ax / az, ay / az}, {bx / bz, by / bz}, {cx / cz, cy / cz}}
            SkDEBUGPARAMS(fPts.fDebugGlobalState) },
            SkDoubleToScalar(bz / sqrt(az * cz)) };
    return dst;
}

SkDPoint SkDConic::subDivide(const SkDPoint& a, const SkDPoint& c, double t1, double t2,
        SkScalar* weight) const {
    SkDConic chopped = this->subDivide(t1, t2);
    *weight = chopped.fWeight;
    return chopped[1];
}

int SkTConic::intersectRay(SkIntersections* i, const SkDLine& line) const {
    return i->intersectRay(fConic, line);
}

bool SkTConic::hullIntersects(const SkDQuad& quad, bool* isLinear) const  {
    return quad.hullIntersects(fConic, isLinear);
}

bool SkTConic::hullIntersects(const SkDCubic& cubic, bool* isLinear) const {
    return cubic.hullIntersects(fConic, isLinear);
}

void SkTConic::setBounds(SkDRect* rect) const {
    rect->setBounds(fConic);
}