smallpaths.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/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/pathops/SkPathOps.h"
#include <tuple>

Go to the source code of this file.

Classes
class	SmallPathsGM

Macros
#define	N   std::size(gProcs)

Typedefs
typedef PathDY(*	MakePathProc) ()

Functions
static PathDY	make_triangle ()
static PathDY	make_rect ()
static PathDY	make_oval ()
static PathDY	make_star (int n)
static PathDY	make_star_5 ()
static PathDY	make_star_13 ()
static PathDY	make_three_line ()
static PathDY	make_arrow ()
static PathDY	make_curve ()
static PathDY	make_battery ()
static PathDY	make_battery2 ()
static PathDY	make_ring ()

Variables
constexpr MakePathProc	gProcs []
constexpr SkScalar	gWidths []
constexpr SkScalar	gMiters []
constexpr SkScalar	gXTranslate []

Macro Definition Documentation

N

#define N   std::size(gProcs)

Definition at line 318 of file smallpaths.cpp.

Typedef Documentation

MakePathProc

typedef PathDY(* MakePathProc) ()

Definition at line 27 of file smallpaths.cpp.

Function Documentation

make_arrow()

static PathDY make_arrow ( )

static

Definition at line 101 of file smallpaths.cpp.

                           {
    static SkScalar xOffset = 34.f;
    static SkScalar yOffset = 40.f;
    SkPathBuilder b;
    b.moveTo(-26.f + xOffset, 0.0f + yOffset);
    b.lineTo(26.f + xOffset, 0.0f + yOffset);
 
    b.moveTo(-28.f + xOffset, -2.4748745f + yOffset);
    b.lineTo(0 + xOffset, 25.525126f + yOffset);
 
    b.moveTo(-28.f + xOffset, 2.4748745f + yOffset);
    b.lineTo(0 + xOffset, -25.525126f + yOffset);
    b.lineTo(-28.f + xOffset, 2.4748745f + yOffset);
 
    b.close();
 
    return { b.detach(), 70 };
}

make_battery()

static PathDY make_battery ( )

static

Definition at line 132 of file smallpaths.cpp.

                             {
    static SkScalar xOffset = 5.0f;
 
    SkPathBuilder b;
    b.moveTo(24.67f + xOffset, 0.33000004f);
    b.lineTo(8.3299999f + xOffset, 0.33000004f);
    b.lineTo(8.3299999f + xOffset, 5.3299999f);
    b.lineTo(0.33000004f + xOffset, 5.3299999f);
    b.lineTo(0.33000004f + xOffset, 50.669998f);
    b.lineTo(32.669998f + xOffset, 50.669998f);
    b.lineTo(32.669998f + xOffset, 5.3299999f);
    b.lineTo(24.67f + xOffset, 5.3299999f);
    b.lineTo(24.67f + xOffset, 0.33000004f);
    b.close();
 
    b.moveTo(25.727224f + xOffset, 12.886665f);
    b.lineTo(10.907918f + xOffset, 12.886665f);
    b.lineTo(7.5166659f + xOffset, 28.683645f);
    b.lineTo(14.810181f + xOffset, 28.683645f);
    b.lineTo(7.7024879f + xOffset, 46.135998f);
    b.lineTo(28.049999f + xOffset, 25.136419f);
    b.lineTo(16.854223f + xOffset, 25.136419f);
    b.lineTo(25.727224f + xOffset, 12.886665f);
    b.close();
    return { b.detach(), 50 };
}

make_battery2()

static PathDY make_battery2 ( )

static

Definition at line 159 of file smallpaths.cpp.

                              {
    static SkScalar xOffset = 225.625f;
 
    SkPathBuilder b;
    b.moveTo(32.669998f + xOffset, 9.8640003f);
    b.lineTo(0.33000004f + xOffset, 9.8640003f);
    b.lineTo(0.33000004f + xOffset, 50.669998f);
    b.lineTo(32.669998f + xOffset, 50.669998f);
    b.lineTo(32.669998f + xOffset, 9.8640003f);
    b.close();
 
    b.moveTo(10.907918f + xOffset, 12.886665f);
    b.lineTo(25.727224f + xOffset, 12.886665f);
    b.lineTo(16.854223f + xOffset, 25.136419f);
    b.lineTo(28.049999f + xOffset, 25.136419f);
    b.lineTo(7.7024879f + xOffset, 46.135998f);
    b.lineTo(14.810181f + xOffset, 28.683645f);
    b.lineTo(7.5166659f + xOffset, 28.683645f);
    b.lineTo(10.907918f + xOffset, 12.886665f);
    b.close();
 
    return { b.detach(), 60 };
}

make_curve()

static PathDY make_curve ( )

static

Definition at line 120 of file smallpaths.cpp.

                           {
    static SkScalar xOffset = -382.f;
    static SkScalar yOffset = -50.f;
    SkPathBuilder b;
    b.moveTo(491 + xOffset, 56 + yOffset);
    b.conicTo(435.93292f + xOffset, 56.000031f + yOffset,
                  382.61078f + xOffset, 69.752716f + yOffset,
                  0.9920463f);
 
    return { b.detach(), 40 };
}

make_oval()

static PathDY make_oval ( )

static

Definition at line 53 of file smallpaths.cpp.

                          {
    SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
                 SkIntToScalar(30), SkIntToScalar(30) };
    return {
        SkPath::Oval(r.makeOffset(10, 0)),
        30
    };
}

make_rect()

static PathDY make_rect ( )

static

Definition at line 44 of file smallpaths.cpp.

                          {
    SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
                 SkIntToScalar(30), SkIntToScalar(30) };
    return {
        SkPath::Rect(r.makeOffset(10, 0)),
        30
    };
}

make_ring()

static PathDY make_ring ( )

static

Definition at line 183 of file smallpaths.cpp.

                          {
    static SkScalar xOffset = 120;
    static SkScalar yOffset = -270.f;
 
    SkPathBuilder b;
    b.setFillType(SkPathFillType::kWinding);
    b.moveTo(xOffset + 144.859f, yOffset + 285.172f);
    b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
    b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
    b.lineTo(xOffset + 143.132f, yOffset + 284.617f);
    b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
    b.close();
    b.moveTo(xOffset + 135.922f, yOffset + 286.844f);
    b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
    b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
    b.lineTo(xOffset + 135.367f, yOffset + 288.571f);
    b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
    b.close();
    b.moveTo(xOffset + 135.922f, yOffset + 286.844f);
    b.cubicTo(xOffset + 137.07f, yOffset + 287.219f, xOffset + 138.242f, yOffset + 287.086f,
              xOffset + 139.242f, yOffset + 286.578f);
    b.cubicTo(xOffset + 140.234f, yOffset + 286.078f, xOffset + 141.031f, yOffset + 285.203f,
              xOffset + 141.406f, yOffset + 284.055f);
    b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
    b.cubicTo(xOffset + 143.492f, yOffset + 289.375f, xOffset + 138.992f, yOffset + 291.656f,
              xOffset + 134.797f, yOffset + 290.297f);
    b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
    b.close();
    b.moveTo(xOffset + 129.68f, yOffset + 280.242f);
    b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
    b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
    b.lineTo(xOffset + 131.407f, yOffset + 280.804f);
    b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
    b.close();
    b.moveTo(xOffset + 133.133f, yOffset + 281.367f);
    b.cubicTo(xOffset + 132.758f, yOffset + 282.508f, xOffset + 132.883f, yOffset + 283.687f,
              xOffset + 133.391f, yOffset + 284.679f);
    b.cubicTo(xOffset + 133.907f, yOffset + 285.679f, xOffset + 134.774f, yOffset + 286.468f,
              xOffset + 135.922f, yOffset + 286.843f);
    b.lineTo(xOffset + 134.797f, yOffset + 290.296f);
    b.cubicTo(xOffset + 130.602f, yOffset + 288.929f, xOffset + 128.313f, yOffset + 284.437f,
              xOffset + 129.68f, yOffset + 280.241f);
    b.lineTo(xOffset + 133.133f, yOffset + 281.367f);
    b.close();
    b.moveTo(xOffset + 139.742f, yOffset + 275.117f);
    b.lineTo(xOffset + 139.742f, yOffset + 275.117f);
    b.lineTo(xOffset + 139.18f, yOffset + 276.844f);
    b.lineTo(xOffset + 139.742f, yOffset + 275.117f);
    b.close();
    b.moveTo(xOffset + 138.609f, yOffset + 278.57f);
    b.cubicTo(xOffset + 137.461f, yOffset + 278.203f, xOffset + 136.297f, yOffset + 278.328f,
              xOffset + 135.297f, yOffset + 278.836f);
    b.cubicTo(xOffset + 134.297f, yOffset + 279.344f, xOffset + 133.508f, yOffset + 280.219f,
              xOffset + 133.133f, yOffset + 281.367f);
    b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
    b.cubicTo(xOffset + 131.047f, yOffset + 276.039f, xOffset + 135.539f, yOffset + 273.758f,
              xOffset + 139.742f, yOffset + 275.117f);
    b.lineTo(xOffset + 138.609f, yOffset + 278.57f);
    b.close();
    b.moveTo(xOffset + 141.406f, yOffset + 284.055f);
    b.cubicTo(xOffset + 141.773f, yOffset + 282.907f, xOffset + 141.648f, yOffset + 281.735f,
              xOffset + 141.148f, yOffset + 280.735f);
    b.cubicTo(xOffset + 140.625f, yOffset + 279.735f, xOffset + 139.757f, yOffset + 278.946f,
              xOffset + 138.609f, yOffset + 278.571f);
    b.lineTo(xOffset + 139.742f, yOffset + 275.118f);
    b.cubicTo(xOffset + 143.937f, yOffset + 276.493f, xOffset + 146.219f, yOffset + 280.977f,
              xOffset + 144.859f, yOffset + 285.173f);
    b.lineTo(xOffset + 141.406f, yOffset + 284.055f);
    b.close();
 
    // uncomment to reveal PathOps bug, see https://bugs.chromium.org/p/skia/issues/detail?id=9732
    // (void) Simplify(*path, path);
 
    return { b.detach(), 15 };
}

make_star()

static PathDY make_star ( int  n )

static

Definition at line 62 of file smallpaths.cpp.

                               {
    const SkScalar c = SkIntToScalar(45);
    const SkScalar r = SkIntToScalar(20);
 
    SkScalar rad = -SK_ScalarPI / 2;
    const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
 
    SkPathBuilder b;
    b.moveTo(c, c - r);
    for (int i = 1; i < n; i++) {
        rad += drad;
        b.lineTo(c + SkScalarCos(rad) * r, c + SkScalarSin(rad) * r);
    }
    b.close();
    return { b.detach(), r * 2 * 6 / 5 };
}

make_star_13()

static PathDY make_star_13 ( )

static

Definition at line 80 of file smallpaths.cpp.

{ return make_star(13); }

make_star_5()

static PathDY make_star_5 ( )

static

Definition at line 79 of file smallpaths.cpp.

{ return make_star(5); }

make_three_line()

static PathDY make_three_line ( )

static

Definition at line 82 of file smallpaths.cpp.

                                {
    static SkScalar xOffset = 34.f;
    static SkScalar yOffset = 50.f;
    SkPathBuilder b;
    b.moveTo(-32.5f + xOffset, 0.0f + yOffset);
    b.lineTo(32.5f + xOffset, 0.0f + yOffset);
 
    b.moveTo(-32.5f + xOffset, 19 + yOffset);
    b.lineTo(32.5f + xOffset, 19 + yOffset);
 
    b.moveTo(-32.5f + xOffset, -19 + yOffset);
    b.lineTo(32.5f + xOffset, -19 + yOffset);
    b.lineTo(-32.5f + xOffset, -19 + yOffset);
 
    b.close();
 
    return { b.detach(), 70 };
}

make_triangle()

static PathDY make_triangle ( )

static

Definition at line 29 of file smallpaths.cpp.

                              {
    constexpr int gCoord[] = {
        10, 20, 15, 5, 30, 30
    };
    return {
        SkPathBuilder().moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]))
                       .lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]))
                       .lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]))
                       .close()
                       .offset(10, 0)
                       .detach(),
        30
    };
}

Variable Documentation

gMiters

constexpr SkScalar gMiters[]

constexpr

Initial value:

= {
    2.0f,
    3.0f,
    3.0f,
    3.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
}

Definition at line 288 of file smallpaths.cpp.

                               {
    2.0f,
    3.0f,
    3.0f,
    3.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
    4.0f,
};

gProcs

constexpr MakePathProc gProcs[]

constexpr

Initial value:

= {
    make_triangle,
    make_rect,
    make_oval,
    make_star_5,
    make_star_13,
    make_three_line,
    make_arrow,
    make_curve,
    make_battery,
    make_battery2,
    make_ring
}

Definition at line 259 of file smallpaths.cpp.

                                  {
    make_triangle,
    make_rect,
    make_oval,
    make_star_5,
    make_star_13,
    make_three_line,
    make_arrow,
    make_curve,
    make_battery,
    make_battery2,
    make_ring
};

gWidths

constexpr SkScalar gWidths[]

constexpr

Initial value:

= {
    2.0f,
    3.0f,
    4.0f,
    5.0f,
    6.0f,
    7.0f,
    7.0f,
    14.0f,
    0.0f,
    0.0f,
    0.0f
}

Definition at line 273 of file smallpaths.cpp.

                               {
    2.0f,
    3.0f,
    4.0f,
    5.0f,
    6.0f,
    7.0f,
    7.0f,
    14.0f,
    0.0f,
    0.0f,
    0.0f
};

gXTranslate

constexpr SkScalar gXTranslate[]

constexpr

Initial value:

= {
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    -220.625f,
    0.0f,
    0.0f,
}

Definition at line 303 of file smallpaths.cpp.

                                   {
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    0.0f,
    -220.625f,
    0.0f,
    0.0f,
};