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skia2/gm/smallpaths.cpp
Brian Osman 4428f2c39f Remove SkScalarSinCos 
This differed from the separate versions in that it snapped to zero.
It was also strictly worse than calling the two separate versions.
Most clients don't need the snapping, so just call the two existing
functions. For clients that need the snapping, call new variants of
each that do snap.

Change-Id: Ia4e09fd9651932fe15caeab1399df7f6281bdc17
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/205303
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2019-04-02 15:46:57 +00:00

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8.1 KiB
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/*
* Copyright 2015 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_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_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); }
static SkScalar make_three_line(SkPath* path) {
static SkScalar xOffset = 34.f;
static SkScalar yOffset = 50.f;
path->moveTo(-32.5f + xOffset, 0.0f + yOffset);
path->lineTo(32.5f + xOffset, 0.0f + yOffset);
path->moveTo(-32.5f + xOffset, 19 + yOffset);
path->lineTo(32.5f + xOffset, 19 + yOffset);
path->moveTo(-32.5f + xOffset, -19 + yOffset);
path->lineTo(32.5f + xOffset, -19 + yOffset);
path->lineTo(-32.5f + xOffset, -19 + yOffset);
path->close();
return SkIntToScalar(70);
}
static SkScalar make_arrow(SkPath* path) {
static SkScalar xOffset = 34.f;
static SkScalar yOffset = 40.f;
path->moveTo(-26.f + xOffset, 0.0f + yOffset);
path->lineTo(26.f + xOffset, 0.0f + yOffset);
path->moveTo(-28.f + xOffset, -2.4748745f + yOffset);
path->lineTo(0 + xOffset, 25.525126f + yOffset);
path->moveTo(-28.f + xOffset, 2.4748745f + yOffset);
path->lineTo(0 + xOffset, -25.525126f + yOffset);
path->lineTo(-28.f + xOffset, 2.4748745f + yOffset);
path->close();
return SkIntToScalar(70);
}
static SkScalar make_curve(SkPath* path) {
static SkScalar xOffset = -382.f;
static SkScalar yOffset = -50.f;
path->moveTo(491 + xOffset, 56 + yOffset);
path->conicTo(435.93292f + xOffset, 56.000031f + yOffset,
382.61078f + xOffset, 69.752716f + yOffset,
0.9920463f);
return SkIntToScalar(40);
}
static SkScalar make_battery(SkPath* path) {
static SkScalar xOffset = 5.0f;
path->moveTo(24.67f + xOffset, 0.33000004f);
path->lineTo(8.3299999f + xOffset, 0.33000004f);
path->lineTo(8.3299999f + xOffset, 5.3299999f);
path->lineTo(0.33000004f + xOffset, 5.3299999f);
path->lineTo(0.33000004f + xOffset, 50.669998f);
path->lineTo(32.669998f + xOffset, 50.669998f);
path->lineTo(32.669998f + xOffset, 5.3299999f);
path->lineTo(24.67f + xOffset, 5.3299999f);
path->lineTo(24.67f + xOffset, 0.33000004f);
path->close();
path->moveTo(25.727224f + xOffset, 12.886665f);
path->lineTo(10.907918f + xOffset, 12.886665f);
path->lineTo(7.5166659f + xOffset, 28.683645f);
path->lineTo(14.810181f + xOffset, 28.683645f);
path->lineTo(7.7024879f + xOffset, 46.135998f);
path->lineTo(28.049999f + xOffset, 25.136419f);
path->lineTo(16.854223f + xOffset, 25.136419f);
path->lineTo(25.727224f + xOffset, 12.886665f);
path->close();
return SkIntToScalar(50);
}
static SkScalar make_battery2(SkPath* path) {
static SkScalar xOffset = 225.625f;
path->moveTo(32.669998f + xOffset, 9.8640003f);
path->lineTo(0.33000004f + xOffset, 9.8640003f);
path->lineTo(0.33000004f + xOffset, 50.669998f);
path->lineTo(32.669998f + xOffset, 50.669998f);
path->lineTo(32.669998f + xOffset, 9.8640003f);
path->close();
path->moveTo(10.907918f + xOffset, 12.886665f);
path->lineTo(25.727224f + xOffset, 12.886665f);
path->lineTo(16.854223f + xOffset, 25.136419f);
path->lineTo(28.049999f + xOffset, 25.136419f);
path->lineTo(7.7024879f + xOffset, 46.135998f);
path->lineTo(14.810181f + xOffset, 28.683645f);
path->lineTo(7.5166659f + xOffset, 28.683645f);
path->lineTo(10.907918f + xOffset, 12.886665f);
path->close();
return SkIntToScalar(70);
}
constexpr MakePathProc gProcs[] = {
make_triangle,
make_rect,
make_oval,
make_star_5,
make_star_13,
make_three_line,
make_arrow,
make_curve,
make_battery,
make_battery2
};
constexpr SkScalar gWidths[] = {
2.0f,
3.0f,
4.0f,
5.0f,
6.0f,
7.0f,
7.0f,
14.0f,
0.0f,
0.0f,
};
constexpr SkScalar gMiters[] = {
2.0f,
3.0f,
3.0f,
3.0f,
4.0f,
4.0f,
4.0f,
4.0f,
4.0f,
4.0f,
};
constexpr SkScalar gXTranslate[] = {
0.0f,
0.0f,
0.0f,
0.0f,
0.0f,
0.0f,
0.0f,
0.0f,
-220.625f,
0.0f,
};
#define N SK_ARRAY_COUNT(gProcs)
// This GM tests out drawing small paths (i.e., for Ganesh, using the Distance
// Field path renderer) which are filled, stroked and filledAndStroked. In
// particular this ensures that any cache keys in use include the stroking
// parameters.
class SmallPathsGM : 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("smallpaths");
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
// first column: filled paths
canvas->save();
for (size_t i = 0; i < N; i++) {
canvas->drawPath(fPath[i], paint);
canvas->translate(gXTranslate[i], fDY[i]);
}
canvas->restore();
canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
// second column: stroked paths
canvas->save();
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeCap(SkPaint::kButt_Cap);
for (size_t i = 0; i < N; i++) {
paint.setStrokeWidth(gWidths[i]);
paint.setStrokeMiter(gMiters[i]);
canvas->drawPath(fPath[i], paint);
canvas->translate(gXTranslate[i], fDY[i]);
}
canvas->restore();
canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
// third column: stroked paths with different widths
canvas->save();
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeCap(SkPaint::kButt_Cap);
for (size_t i = 0; i < N; i++) {
paint.setStrokeWidth(gWidths[i] + 2.0f);
paint.setStrokeMiter(gMiters[i]);
canvas->drawPath(fPath[i], paint);
canvas->translate(gXTranslate[i], fDY[i]);
}
canvas->restore();
canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
// fourth column: stroked and filled paths
paint.setStyle(SkPaint::kStrokeAndFill_Style);
paint.setStrokeCap(SkPaint::kButt_Cap);
for (size_t i = 0; i < N; i++) {
paint.setStrokeWidth(gWidths[i]);
paint.setStrokeMiter(gMiters[i]);
canvas->drawPath(fPath[i], paint);
canvas->translate(gXTranslate[i], fDY[i]);
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM(return new SmallPathsGM;)
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