beziers.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPathBuilder.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "src/base/SkRandom.h"

Go to the source code of this file.

Classes
class	BeziersGM

Macros
#define	W   400
#define	H   400
#define	N   10

Functions
static SkPath	rnd_quad (SkPaint *paint, SkRandom &rand)
static SkPath	rnd_cubic (SkPaint *paint, SkRandom &rand)

Variables
constexpr SkScalar	SH = SkIntToScalar(H)

Macro Definition Documentation

H

#define H   400

Definition at line 18 of file beziers.cpp.

N

#define N   10

Definition at line 19 of file beziers.cpp.

W

#define W   400

Definition at line 17 of file beziers.cpp.

Function Documentation

rnd_cubic()

static SkPath rnd_cubic ( SkPaint *  paint, SkRandom &  rand  )

static

Definition at line 44 of file beziers.cpp.

                                                        {
    auto a = rand.nextRangeScalar(0,W),
         b = rand.nextRangeScalar(0,H);
 
    SkPathBuilder builder;
    builder.moveTo(a, b);
    for (int x = 0; x < 2; ++x) {
        auto c = rand.nextRangeScalar(W/4, W),
             d = rand.nextRangeScalar(  0, H),
             e = rand.nextRangeScalar(  0, W),
             f = rand.nextRangeScalar(H/4, H),
             g = rand.nextRangeScalar(W/4, W),
             h = rand.nextRangeScalar(H/4, H);
        builder.cubicTo(c,d,e,f,g,h);
    }
    paint->setColor(rand.nextU());
    SkScalar width = rand.nextRangeScalar(1, 5);
    width *= width;
    paint->setStrokeWidth(width);
    paint->setAlphaf(1.0f);
    return builder.detach();
}

rnd_quad()

static SkPath rnd_quad ( SkPaint *  paint, SkRandom &  rand  )

static

Definition at line 23 of file beziers.cpp.

                                                       {
    auto a = rand.nextRangeScalar(0,W),
         b = rand.nextRangeScalar(0,H);
 
    SkPathBuilder builder;
    builder.moveTo(a, b);
    for (int x = 0; x < 2; ++x) {
        auto c = rand.nextRangeScalar(W/4, W),
             d = rand.nextRangeScalar(  0, H),
             e = rand.nextRangeScalar(  0, W),
             f = rand.nextRangeScalar(H/4, H);
        builder.quadTo(c,d,e,f);
    }
    paint->setColor(rand.nextU());
    SkScalar width = rand.nextRangeScalar(1, 5);
    width *= width;
    paint->setStrokeWidth(width);
    paint->setAlphaf(1.0f);
    return builder.detach();
}

Variable Documentation

SH

constexpr SkScalar SH = SkIntToScalar(H)

constexpr

Definition at line 21 of file beziers.cpp.