/*
* Copyright 2013 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 "SkTArray.h"
#include "SkRandom.h"
#include "SkMatrix.h"
#include "SkBlurMaskFilter.h"
#include "SkGradientShader.h"
#include "SkBlurDrawLooper.h"
#include "SkRect.h"
namespace skiagm {
class OvalGM : public GM {
public:
OvalGM() {
this->setBGColor(0xFF000000);
this->makePaints();
this->makeMatrices();
}
protected:
SkString onShortName() override {
return SkString("ovals");
}
SkISize onISize() override {
return SkISize::Make(1200, 900);
}
void makePaints() {
{
// no AA
SkPaint p;
fPaints.push_back(p);
}
{
// AA
SkPaint p;
p.setAntiAlias(true);
fPaints.push_back(p);
}
{
// AA with stroke style
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SkIntToScalar(5));
fPaints.push_back(p);
}
{
// AA with stroke style, width = 0
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
fPaints.push_back(p);
}
{
// AA with stroke and fill style
SkPaint p;
p.setAntiAlias(true);
p.setStyle(SkPaint::kStrokeAndFill_Style);
p.setStrokeWidth(SkIntToScalar(3));
fPaints.push_back(p);
}
}
void makeMatrices() {
{
SkMatrix m;
m.setIdentity();
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setScale(SkIntToScalar(3), SkIntToScalar(2));
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setScale(SkIntToScalar(2), SkIntToScalar(2));
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setScale(SkIntToScalar(1), SkIntToScalar(2));
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setScale(SkIntToScalar(4), SkIntToScalar(1));
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setRotate(SkIntToScalar(90));
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setSkew(SkIntToScalar(2), SkIntToScalar(3));
fMatrices.push_back(m);
}
{
SkMatrix m;
m.setRotate(SkIntToScalar(60));
fMatrices.push_back(m);
}
}
SkColor genColor(SkRandom* rand) {
SkScalar hsv[3];
hsv[0] = rand->nextRangeF(0.0f, 360.0f);
hsv[1] = rand->nextRangeF(0.75f, 1.0f);
hsv[2] = rand->nextRangeF(0.75f, 1.0f);
return sk_tool_utils::color_to_565(SkHSVToColor(hsv));
}
void onDraw(SkCanvas* canvas) override {
SkRandom rand(1);
canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
SkRect oval = SkRect::MakeLTRB(-20, -30, 20, 30);
const SkScalar kXStart = 60.0f;
const SkScalar kYStart = 80.0f;
const int kXStep = 150;
const int kYStep = 160;
int maxX = fMatrices.count();
SkPaint rectPaint;
rectPaint.setAntiAlias(true);
rectPaint.setStyle(SkPaint::kStroke_Style);
rectPaint.setStrokeWidth(SkIntToScalar(0));
rectPaint.setColor(sk_tool_utils::color_to_565(SK_ColorLTGRAY));
int testCount = 0;
for (int i = 0; i < fPaints.count(); ++i) {
for (int j = 0; j < fMatrices.count(); ++j) {
canvas->save();
SkMatrix mat = fMatrices[j];
// position the oval, and make it at off-integer coords.
mat.postTranslate(kXStart + SK_Scalar1 * kXStep * (testCount % maxX) +
SK_Scalar1 / 4,
kYStart + SK_Scalar1 * kYStep * (testCount / maxX) +
3 * SK_Scalar1 / 4);
canvas->concat(mat);
SkColor color = genColor(&rand);
fPaints[i].setColor(color);
canvas->drawRect(oval, rectPaint);
canvas->drawOval(oval, fPaints[i]);
canvas->restore();
++testCount;
}
}
// special cases
// non-scaled tall and skinny oval
for (int i = 0; i < fPaints.count(); ++i) {
SkRect oval = SkRect::MakeLTRB(-20, -60, 20, 60);
canvas->save();
// position the oval, and make it at off-integer coords.
canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.55f + SK_Scalar1 / 4,
kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4);
SkColor color = genColor(&rand);
fPaints[i].setColor(color);
canvas->drawRect(oval, rectPaint);
canvas->drawOval(oval, fPaints[i]);
canvas->restore();
}
// non-scaled wide and short oval
for (int i = 0; i < fPaints.count(); ++i) {
SkRect oval = SkRect::MakeLTRB(-80, -30, 80, 30);
canvas->save();
// position the oval, and make it at off-integer coords.
canvas->translate(kXStart + SK_Scalar1 * kXStep * 4 + SK_Scalar1 / 4,
kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
SK_ScalarHalf * kYStep);
SkColor color = genColor(&rand);
fPaints[i].setColor(color);
canvas->drawRect(oval, rectPaint);
canvas->drawOval(oval, fPaints[i]);
canvas->restore();
}
// super skinny oval
for (int i = 0; i < fPaints.count(); ++i) {
SkRect oval = SkRect::MakeLTRB(0, -60, 1, 60);
canvas->save();
// position the oval, and make it at off-integer coords.
canvas->translate(kXStart + SK_Scalar1 * kXStep * 3.25f + SK_Scalar1 / 4,
kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4);
SkColor color = genColor(&rand);
fPaints[i].setColor(color);
canvas->drawOval(oval, fPaints[i]);
canvas->restore();
}
// super short oval
for (int i = 0; i < fPaints.count(); ++i) {
SkRect oval = SkRect::MakeLTRB(-80, -1, 80, 0);
canvas->save();
// position the oval, and make it at off-integer coords.
canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.5f + SK_Scalar1 / 4,
kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
SK_ScalarHalf * kYStep);
SkColor color = genColor(&rand);
fPaints[i].setColor(color);
canvas->drawOval(oval, fPaints[i]);
canvas->restore();
}
// radial gradient
SkPoint center = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0));
SkColor colors[] = { SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN };
SkScalar pos[] = { 0, SK_ScalarHalf, SK_Scalar1 };
SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(center,
SkIntToScalar(20),
colors,
pos,
SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode));
for (int i = 0; i < fPaints.count(); ++i) {
canvas->save();
// position the path, and make it at off-integer coords.
canvas->translate(kXStart + SK_Scalar1 * kXStep * 0 + SK_Scalar1 / 4,
kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
SK_ScalarHalf * kYStep);
SkColor color = genColor(&rand);
fPaints[i].setColor(color);
fPaints[i].setShader(shader);
canvas->drawRect(oval, rectPaint);
canvas->drawOval(oval, fPaints[i]);
fPaints[i].setShader(nullptr);
canvas->restore();
}
}
private:
SkTArray<SkPaint> fPaints;
SkTArray<SkMatrix> fMatrices;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new OvalGM; }
static GMRegistry reg(MyFactory);
}