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skia2/gm/pathfill.cpp
Mike Reed cfb130c662 Add arc methods to path builder 
Bug: skia:9000
Change-Id: I0a25c6f792f59230762651386da74e547b073930
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307558
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2020-08-03 15:50:01 +00:00

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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.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"
typedef SkScalar (*MakePathProc)(SkPath*);
static SkScalar make_frame(SkPath* path) {
SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(630), SkIntToScalar(470) };
path->addRoundRect(r, SkIntToScalar(15), SkIntToScalar(15));
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(5));
paint.getFillPath(*path, path);
return SkIntToScalar(15);
}
static SkScalar make_triangle(SkPath* path) {
constexpr int gCoord[] = {
10, 20, 15, 5, 30, 30
};
path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
path->close();
path->offset(SkIntToScalar(10), SkIntToScalar(0));
return SkIntToScalar(30);
}
static SkScalar make_rect(SkPath* path) {
SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(30), SkIntToScalar(30) };
path->addRect(r);
path->offset(SkIntToScalar(10), SkIntToScalar(0));
return SkIntToScalar(30);
}
static SkScalar make_oval(SkPath* path) {
SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(30), SkIntToScalar(30) };
path->addOval(r);
path->offset(SkIntToScalar(10), SkIntToScalar(0));
return SkIntToScalar(30);
}
static SkScalar make_sawtooth(SkPath* path, int teeth) {
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(20);
const SkScalar x0 = x;
const SkScalar dx = SkIntToScalar(5);
const SkScalar dy = SkIntToScalar(10);
path->moveTo(x, y);
for (int i = 0; i < teeth; i++) {
x += dx;
path->lineTo(x, y - dy);
x += dx;
path->lineTo(x, y + dy);
}
path->lineTo(x, y + (2 * dy));
path->lineTo(x0, y + (2 * dy));
path->close();
return SkIntToScalar(30);
}
static SkScalar make_sawtooth_3(SkPath* path) { return make_sawtooth(path, 3); }
static SkScalar make_sawtooth_32(SkPath* path) { return make_sawtooth(path, 32); }
static SkScalar make_house(SkPath* path) {
path->moveTo(21, 23);
path->lineTo(21, 11.534f);
path->lineTo(22.327f, 12.741f);
path->lineTo(23.673f, 11.261f);
path->lineTo(12, 0.648f);
path->lineTo(8, 4.285f);
path->lineTo(8, 2);
path->lineTo(4, 2);
path->lineTo(4, 7.921f);
path->lineTo(0.327f, 11.26f);
path->lineTo(1.673f, 12.74f);
path->lineTo(3, 11.534f);
path->lineTo(3, 23);
path->lineTo(11, 23);
path->lineTo(11, 18);
path->lineTo(13, 18);
path->lineTo(13, 23);
path->lineTo(21, 23);
path->close();
path->lineTo(9, 16);
path->lineTo(9, 21);
path->lineTo(5, 21);
path->lineTo(5, 9.715f);
path->lineTo(12, 3.351f);
path->lineTo(19, 9.715f);
path->lineTo(19, 21);
path->lineTo(15, 21);
path->lineTo(15, 16);
path->lineTo(9, 16);
path->close();
path->offset(20, 0);
return SkIntToScalar(30);
}
static SkScalar make_star(SkPath* path, int n) {
const SkScalar c = SkIntToScalar(45);
const SkScalar r = SkIntToScalar(20);
SkScalar rad = -SK_ScalarPI / 2;
const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
path->moveTo(c, c - r);
for (int i = 1; i < n; i++) {
rad += drad;
path->lineTo(c + SkScalarCos(rad) * r, c + SkScalarSin(rad) * r);
}
path->close();
return r * 2 * 6 / 5;
}
static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }
// We don't expect any output from this path.
static SkScalar make_line(SkPath* path) {
path->moveTo(SkIntToScalar(30), SkIntToScalar(30));
path->lineTo(SkIntToScalar(120), SkIntToScalar(40));
path->close();
path->moveTo(SkIntToScalar(150), SkIntToScalar(30));
path->lineTo(SkIntToScalar(150), SkIntToScalar(30));
path->lineTo(SkIntToScalar(300), SkIntToScalar(40));
path->close();
return SkIntToScalar(40);
}
static void make_info(SkPath* path) {
path->moveTo(24, 4);
path->cubicTo(12.94999980926514f,
4,
4,
12.94999980926514f,
4,
24);
path->cubicTo(4,
35.04999923706055f,
12.94999980926514f,
44,
24,
44);
path->cubicTo(35.04999923706055f,
44,
44,
35.04999923706055f,
44,
24);
path->cubicTo(44,
12.95000076293945f,
35.04999923706055f,
4,
24,
4);
path->close();
path->moveTo(26, 34);
path->lineTo(22, 34);
path->lineTo(22, 22);
path->lineTo(26, 22);
path->lineTo(26, 34);
path->close();
path->moveTo(26, 18);
path->lineTo(22, 18);
path->lineTo(22, 14);
path->lineTo(26, 14);
path->lineTo(26, 18);
path->close();
}
static void make_accessibility(SkPath* path) {
path->moveTo(12, 2);
path->cubicTo(13.10000038146973f,
2,
14,
2.900000095367432f,
14,
4);
path->cubicTo(14,
5.099999904632568f,
13.10000038146973f,
6,
12,
6);
path->cubicTo(10.89999961853027f,
6,
10,
5.099999904632568f,
10,
4);
path->cubicTo(10,
2.900000095367432f,
10.89999961853027f,
2,
12,
2);
path->close();
path->moveTo(21, 9);
path->lineTo(15, 9);
path->lineTo(15, 22);
path->lineTo(13, 22);
path->lineTo(13, 16);
path->lineTo(11, 16);
path->lineTo(11, 22);
path->lineTo(9, 22);
path->lineTo(9, 9);
path->lineTo(3, 9);
path->lineTo(3, 7);
path->lineTo(21, 7);
path->lineTo(21, 9);
path->close();
}
// test case for http://crbug.com/695196
static void make_visualizer(SkPath* path) {
path->moveTo(1.9520f, 2.0000f);
path->conicTo(1.5573f, 1.9992f, 1.2782f, 2.2782f, 0.9235f);
path->conicTo(0.9992f, 2.5573f, 1.0000f, 2.9520f, 0.9235f);
path->lineTo(1.0000f, 5.4300f);
path->lineTo(17.0000f, 5.4300f);
path->lineTo(17.0000f, 2.9520f);
path->conicTo(17.0008f, 2.5573f, 16.7218f, 2.2782f, 0.9235f);
path->conicTo(16.4427f, 1.9992f, 16.0480f, 2.0000f, 0.9235f);
path->lineTo(1.9520f, 2.0000f);
path->close();
path->moveTo(2.7140f, 3.1430f);
path->conicTo(3.0547f, 3.1287f, 3.2292f, 3.4216f, 0.8590f);
path->conicTo(3.4038f, 3.7145f, 3.2292f, 4.0074f, 0.8590f);
path->conicTo(3.0547f, 4.3003f, 2.7140f, 4.2860f, 0.8590f);
path->conicTo(2.1659f, 4.2631f, 2.1659f, 3.7145f, 0.7217f);
path->conicTo(2.1659f, 3.1659f, 2.7140f, 3.1430f, 0.7217f);
path->lineTo(2.7140f, 3.1430f);
path->close();
path->moveTo(5.0000f, 3.1430f);
path->conicTo(5.3407f, 3.1287f, 5.5152f, 3.4216f, 0.8590f);
path->conicTo(5.6898f, 3.7145f, 5.5152f, 4.0074f, 0.8590f);
path->conicTo(5.3407f, 4.3003f, 5.0000f, 4.2860f, 0.8590f);
path->conicTo(4.4519f, 4.2631f, 4.4519f, 3.7145f, 0.7217f);
path->conicTo(4.4519f, 3.1659f, 5.0000f, 3.1430f, 0.7217f);
path->lineTo(5.0000f, 3.1430f);
path->close();
path->moveTo(7.2860f, 3.1430f);
path->conicTo(7.6267f, 3.1287f, 7.8012f, 3.4216f, 0.8590f);
path->conicTo(7.9758f, 3.7145f, 7.8012f, 4.0074f, 0.8590f);
path->conicTo(7.6267f, 4.3003f, 7.2860f, 4.2860f, 0.8590f);
path->conicTo(6.7379f, 4.2631f, 6.7379f, 3.7145f, 0.7217f);
path->conicTo(6.7379f, 3.1659f, 7.2860f, 3.1430f, 0.7217f);
path->close();
path->moveTo(1.0000f, 6.1900f);
path->lineTo(1.0000f, 14.3810f);
path->conicTo(0.9992f, 14.7757f, 1.2782f, 15.0548f, 0.9235f);
path->conicTo(1.5573f, 15.3338f, 1.9520f, 15.3330f, 0.9235f);
path->lineTo(16.0480f, 15.3330f);
path->conicTo(16.4427f, 15.3338f, 16.7218f, 15.0548f, 0.9235f);
path->conicTo(17.0008f, 14.7757f, 17.0000f, 14.3810f, 0.9235f);
path->lineTo(17.0000f, 6.1910f);
path->lineTo(1.0000f, 6.1910f);
path->lineTo(1.0000f, 6.1900f);
path->close();
}
constexpr MakePathProc gProcs[] = {
make_frame,
make_triangle,
make_rect,
make_oval,
make_sawtooth_32,
make_star_5,
make_star_13,
make_line,
make_house,
make_sawtooth_3,
};
#define N SK_ARRAY_COUNT(gProcs)
class PathFillGM : public skiagm::GM {
SkPath fPath[N];
SkScalar fDY[N];
SkPath fInfoPath;
SkPath fAccessibilityPath;
SkPath fVisualizerPath;
protected:
void onOnceBeforeDraw() override {
for (size_t i = 0; i < N; i++) {
fDY[i] = gProcs[i](&fPath[i]);
}
make_info(&fInfoPath);
make_accessibility(&fAccessibilityPath);
make_visualizer(&fVisualizerPath);
}
SkString onShortName() override {
return SkString("pathfill");
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
for (size_t i = 0; i < N; i++) {
canvas->drawPath(fPath[i], paint);
canvas->translate(SkIntToScalar(0), fDY[i]);
}
canvas->save();
canvas->scale(0.300000011920929f, 0.300000011920929f);
canvas->translate(50, 50);
canvas->drawPath(fInfoPath, paint);
canvas->restore();
canvas->scale(2, 2);
canvas->translate(5, 15);
canvas->drawPath(fAccessibilityPath, paint);
canvas->scale(0.5f, 0.5f);
canvas->translate(5, 50);
canvas->drawPath(fVisualizerPath, paint);
}
private:
typedef skiagm::GM INHERITED;
};
// test inverse-fill w/ a clip that completely excludes the geometry
class PathInverseFillGM : public skiagm::GM {
SkPath fPath[N];
SkScalar fDY[N];
protected:
void onOnceBeforeDraw() override {
for (size_t i = 0; i < N; i++) {
fDY[i] = gProcs[i](&fPath[i]);
}
}
SkString onShortName() override {
return SkString("pathinvfill");
}
SkISize onISize() override {
return SkISize::Make(450, 220);
}
static void show(SkCanvas* canvas, const SkPath& path, const SkPaint& paint,
const SkRect* clip, SkScalar top, const SkScalar bottom) {
canvas->save();
if (clip) {
SkRect r = *clip;
r.fTop = top;
r.fBottom = bottom;
canvas->clipRect(r);
}
canvas->drawPath(path, paint);
canvas->restore();
}
void onDraw(SkCanvas* canvas) override {
SkPath path;
path.addCircle(SkIntToScalar(50), SkIntToScalar(50), SkIntToScalar(40));
path.toggleInverseFillType();
SkRect clipR = { 0, 0, SkIntToScalar(100), SkIntToScalar(200) };
canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
for (int doclip = 0; doclip <= 1; ++doclip) {
for (int aa = 0; aa <= 1; ++aa) {
SkPaint paint;
paint.setAntiAlias(SkToBool(aa));
canvas->save();
canvas->clipRect(clipR);
const SkRect* clipPtr = doclip ? &clipR : nullptr;
show(canvas, path, paint, clipPtr, clipR.fTop, clipR.centerY());
show(canvas, path, paint, clipPtr, clipR.centerY(), clipR.fBottom);
canvas->restore();
canvas->translate(SkIntToScalar(110), 0);
}
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_SIMPLE_GM(rotatedcubicpath, canvas, 200, 200) {
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kFill_Style);
canvas->translate(50, 50);
SkPath path;
path.moveTo(48,-23);
path.cubicTo(48,-29.5, 6,-30, 6,-30);
path.cubicTo(6,-30, 2,0, 2,0);
path.cubicTo(2,0, 44,-21.5, 48,-23);
path.close();
p.setColor(SK_ColorBLUE);
canvas->drawPath(path, p);
// Rotated path, which is not antialiased on GPU
p.setColor(SK_ColorRED);
canvas->rotate(90);
canvas->drawPath(path, p);
}
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new PathFillGM; )
DEF_GM( return new PathInverseFillGM; )
DEF_SIMPLE_GM(bug7792, canvas, 800, 800) {
// from skbug.com/7792 bug description
SkPaint p;
SkPath path;
path.moveTo(10, 10);
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
canvas->drawPath(path, p);
// from skbug.com/7792#c3
canvas->translate(200, 0);
path.reset();
path.moveTo(75, 50);
path.moveTo(100, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 50);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c9
canvas->translate(200, 0);
path.reset();
path.moveTo(10, 10);
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c11
canvas->translate(-200 * 2, 200);
path.reset();
path.moveTo(75, 150);
path.lineTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.moveTo(75, 150);
canvas->drawPath(path, p);
// from skbug.com/7792#c14
canvas->translate(200, 0);
path.reset();
path.moveTo(250, 75);
path.moveTo(250, 75);
path.moveTo(250, 75);
path.moveTo(100, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 75);
path.close();
path.lineTo(0, 0);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c15
canvas->translate(200, 0);
path.reset();
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.moveTo(250, 75);
canvas->drawPath(path, p);
// from skbug.com/7792#c17
canvas->translate(-200 * 2, 200);
path.reset();
path.moveTo(75, 10);
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 10);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c19
canvas->translate(200, 0);
path.reset();
path.moveTo(75, 75);
path.lineTo(75, 75);
path.lineTo(75, 75);
path.lineTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.close();
path.moveTo(10, 10);
path.lineTo(30, 10);
path.lineTo(10, 30);
canvas->drawPath(path, p);
// from skbug.com/7792#c23
canvas->translate(200, 0);
path.reset();
path.moveTo(75, 75);
path.lineTo(75, 75);
path.moveTo(75, 75);
path.lineTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c29
canvas->translate(-200 * 2, 200);
path.reset();
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 250);
path.moveTo(75, 75);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c31
canvas->translate(200, 0);
path.reset();
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 10);
path.moveTo(75, 75);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c36
canvas->translate(200, 0);
path.reset();
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(10, 150);
path.moveTo(75, 75);
path.lineTo(75, 75);
canvas->drawPath(path, p);
// from skbug.com/7792#c39
canvas->translate(200, -200 * 3);
path.reset();
path.moveTo(150, 75);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 100);
canvas->drawPath(path, p);
// from zero_length_paths_aa
canvas->translate(0, 200);
path.reset();
path.moveTo(150, 100);
path.lineTo(150, 100);
path.lineTo(150, 150);
path.lineTo(75, 150);
path.lineTo(75, 100);
path.lineTo(75, 75);
path.lineTo(150, 75);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c41
canvas->translate(0, 200);
path.reset();
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(140, 150);
path.lineTo(140, 75);
path.moveTo(75, 75);
path.close();
canvas->drawPath(path, p);
// from skbug.com/7792#c53
canvas->translate(0, 200);
path.reset();
path.moveTo(75, 75);
path.lineTo(150, 75);
path.lineTo(150, 150);
path.lineTo(140, 150);
path.lineTo(140, 75);
path.moveTo(75, 75);
path.close();
canvas->drawPath(path, p);
}
#include "include/core/SkSurface.h"
DEF_SIMPLE_GM(path_stroke_clip_crbug1070835, canvas, 25, 50) {
SkCanvas* orig = canvas;
auto surf = SkSurface::MakeRasterN32Premul(25, 25);
canvas = surf->getCanvas();
SkPaint p;
p.setColor(SK_ColorRED);
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(2);
canvas->scale(4.16666651f/2, 4.16666651f/2);
SkPath path;
SkPoint pts[] = {
{11, 12},
{11, 18.0751324f},
{6.07513189f, 23},
{-4.80825292E-7f, 23},
{-6.07513332f, 23},
{-11, 18.0751324f},
{-11, 11.999999f},
{-10.999999f, 5.92486763f},
{-6.07513189f, 1},
{1.31173692E-7f, 1},
{6.07513141f, 1},
{10.9999981f, 5.92486572f},
{11, 11.9999971f},
};
path.moveTo(pts[0]).cubicTo(pts[1], pts[2], pts[3])
.cubicTo(pts[4], pts[5], pts[6])
.cubicTo(pts[7], pts[8], pts[9])
.cubicTo(pts[10],pts[11],pts[12]);
canvas->drawPath(path, p);
surf->draw(orig, 0, 0, nullptr);
}
DEF_SIMPLE_GM(path_arcto_skbug_9077, canvas, 200, 200) {
SkPaint p;
p.setColor(SK_ColorRED);
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(2);
SkPathBuilder path;
SkPoint pts[] = { {20, 20}, {100, 20}, {100, 60}, {130, 150}, {180, 160} };
SkScalar radius = 60;
path.moveTo(pts[0]);
path.lineTo(pts[1]);
path.lineTo(pts[2]);
path.close();
path.arcTo(pts[3], pts[4], radius);
canvas->drawPath(path.detach(), p);
}
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