26constexpr SkScalar kSweeps[] = {1.f, 45.f, 90.f, 130.f, 180.f, 184.f, 300.f, 355.f};
29constexpr int kW = 1000;
30constexpr int kH = 1000;
35 auto drawGrid = [canvas, &configureStyle] (
SkScalar x,
SkScalar y,
bool useCenter,
bool aa) {
67 drawGrid(0.f , 0.f ,
false,
false);
68 drawGrid(kGridW, 0.f ,
true ,
false);
69 drawGrid(0.f , kGridH,
false,
true );
70 drawGrid(kGridW, kGridH,
true ,
true );
79#define DEF_ARC_GM(name) DEF_SIMPLE_GM(circular_arcs_##name, canvas, kW, kH)
82 auto setFill = [] (
SkPaint*p) { p->setStroke(
false); };
87 auto setHairline = [] (
SkPaint* p) {
89 p->setStrokeWidth(0.f);
95 auto setStroke = [](
SkPaint* p) {
103 auto setStroke = [] (
SkPaint* p) {
111 auto setStroke = [] (
SkPaint* p) {
125 const Arc noDrawArcs[] = {
156 paints.
back().setStrokeWidth(
kS / 6.f);
159 paints.
back().setStrokeWidth(0.f);
162 paints.
back().setStrokeWidth(
kS / 6.f);
165 paints.
back().setStrokeWidth(
kS / 6.f);
166 constexpr SkScalar kDashIntervals[] = {
kS / 15, 2 *
kS / 15};
172 for (
auto arc : noDrawArcs) {
173 for (
auto paint : paints) {
174 paint.setAntiAlias(
true);
175 canvas->
drawArc(arc.fOval, arc.fStart, arc.fSweep,
false,
paint);
176 canvas->
drawArc(arc.fOval, arc.fStart, arc.fSweep,
true,
paint);
187 for (
auto paint : paints) {
188 paint.setAntiAlias(
true);
190 for (
auto arc : arcs) {
191 canvas->
drawArc(arc.fOval, arc.fStart, arc.fSweep,
false,
paint);
194 for (
auto arc : arcs) {
195 canvas->
drawArc(arc.fOval, arc.fStart, arc.fSweep,
true,
paint);
220 canvas->
drawPath(path.detach(), p0);
236 int y0 = 25, y1 = 75, y2 = 125;
237 for (
int r = 2; r <= 20; ++r) {
248 static constexpr SkScalar kStart = 89.f;
275 int baseMatrixCnt = matrices.
size();
280 for (
int i = 0; i < baseMatrixCnt; ++i) {
281 matrices.
push_back().setConcat(matrices[i], tinyCW);
285 for (
int i = 0; i < baseMatrixCnt; ++i) {
286 matrices.
push_back().setConcat(matrices[i], tinyCCW);
290 for (
int i = 0; i < baseMatrixCnt; ++i) {
291 matrices.
push_back().setConcat(matrices[i], cw45);
300 for (
const auto& m : matrices) {
302 paint.setStrokeCap(cap);
303 paint.setAntiAlias(
true);
304 paint.setStroke(
true);
310 paint.setAlpha(0x80);
313 paint.setAlpha(0x80);
314 canvas->
drawArc(bounds, kStart, kSweep - 360.f,
false,
paint);
317 if (
x == baseMatrixCnt) {
326 auto addCanvas2dCircleArcTo = [](
float cx,
float cy,
float radius,
SkPath* path) {
329 path->arcTo(oval, 0.f, -180.f,
false);
330 path->arcTo(oval, -180.f, -180.f,
false);
336 static constexpr float kRadius = 31000.f;
338 addCanvas2dCircleArcTo(0.f,
kRadius + 10.f,
kRadius, &strokedCircle);
339 addCanvas2dCircleArcTo(0.f,
kRadius + 10.f,
kRadius + 5.f, &strokedCircle);
344 canvas->
drawPath(strokedCircle, fill);
constexpr SkColor SK_ColorBLUE
constexpr SkColor SK_ColorRED
constexpr SkColor SK_ColorBLACK
static float SkBits2Float(uint32_t bits)
void draw_arcs(SkCanvas *canvas, std::function< void(SkPaint *)> configureStyle)
constexpr SkScalar kSweeps[]
constexpr SkScalar kDiameter
constexpr SkScalar kStarts[]
void translate(SkScalar dx, SkScalar dy)
void drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, const SkPaint &paint)
void drawArc(const SkRect &oval, SkScalar startAngle, SkScalar sweepAngle, bool useCenter, const SkPaint &paint)
void drawPath(const SkPath &path, const SkPaint &paint)
void concat(const SkMatrix &matrix)
static sk_sp< SkPathEffect > Make(const SkScalar intervals[], int count, SkScalar phase)
SkMatrix & setRotate(SkScalar degrees, SkScalar px, SkScalar py)
static const SkMatrix & I()
@ kButt_Cap
no stroke extension
void setColor(SkColor color)
void setAntiAlias(bool aa)
@ kStrokeAndFill_Style
sets to stroke and fill geometry
void setStrokeWidth(SkScalar width)
void setFillType(SkPathFillType ft)
#define DEF_SIMPLE_GM(NAME, CANVAS, W, H)
constexpr SkScalar kStrokeWidth
static constexpr SkRect MakeXYWH(float x, float y, float w, float h)
constexpr float height() const
constexpr float width() const
static constexpr SkRect MakeWH(float w, float h)
static constexpr SkRect MakeLTRB(float l, float t, float r, float b)