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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.h"
#include "SkPath.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) {
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(20);
const SkScalar x0 = x;
const SkScalar dx = SK_Scalar1 * 5;
const SkScalar dy = SK_Scalar1 * 10;
path->moveTo(x, y);
for (int i = 0; i < 32; 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_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;
SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
path->lineTo(c + SkScalarMul(cosV, r), c + SkScalarMul(sinV, 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);
}
constexpr MakePathProc gProcs[] = {
make_frame,
make_triangle,
make_rect,
make_oval,
make_sawtooth,
make_star_5,
make_star_13,
make_line,
};
#define N SK_ARRAY_COUNT(gProcs)
class PathFillGM : 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("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]);
}
}
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; )
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