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Public Member Functions | Protected Member Functions | List of all members
StringArtGM Class Reference
Inheritance diagram for StringArtGM:
skiagm::GM

Public Member Functions

 StringArtGM ()
 
- Public Member Functions inherited from skiagm::GM
 GM (SkColor backgroundColor=SK_ColorWHITE)
 
virtual ~GM ()
 
void setMode (Mode mode)
 
Mode getMode () const
 
DrawResult gpuSetup (SkCanvas *, SkString *errorMsg, GraphiteTestContext *=nullptr)
 
void gpuTeardown ()
 
void onceBeforeDraw ()
 
DrawResult draw (SkCanvas *canvas)
 
DrawResult draw (SkCanvas *, SkString *errorMsg)
 
void drawBackground (SkCanvas *)
 
DrawResult drawContent (SkCanvas *canvas)
 
DrawResult drawContent (SkCanvas *, SkString *errorMsg)
 
virtual bool runAsBench () const
 
SkScalar width ()
 
SkScalar height ()
 
SkColor getBGColor () const
 
void setBGColor (SkColor)
 
void drawSizeBounds (SkCanvas *, SkColor)
 
bool animate (double)
 
virtual bool onChar (SkUnichar)
 
bool getControls (SkMetaData *controls)
 
void setControls (const SkMetaData &controls)
 
virtual void modifyGrContextOptions (GrContextOptions *)
 
virtual void modifyGraphiteContextOptions (skgpu::graphite::ContextOptions *) const
 
virtual bool isBazelOnly () const
 
virtual std::map< std::string, std::string > getGoldKeys () const
 

Protected Member Functions

SkString getName () const override
 
SkISize getISize () override
 
void onDraw (SkCanvas *canvas) override
 
bool onAnimate (double nanos) override
 
- Protected Member Functions inherited from skiagm::GM
virtual DrawResult onGpuSetup (SkCanvas *, SkString *, GraphiteTestContext *)
 
virtual void onGpuTeardown ()
 
virtual void onOnceBeforeDraw ()
 
virtual DrawResult onDraw (SkCanvas *, SkString *errorMsg)
 
virtual bool onGetControls (SkMetaData *)
 
virtual void onSetControls (const SkMetaData &)
 
GraphiteTestContext * graphiteTestContext () const
 

Additional Inherited Members

- Public Types inherited from skiagm::GM
enum  Mode { kGM_Mode , kSample_Mode , kBench_Mode }
 
using DrawResult = skiagm::DrawResult
 
using GraphiteTestContext = skiatest::graphite::GraphiteTestContext
 
- Static Public Attributes inherited from skiagm::GM
static constexpr char kErrorMsg_DrawSkippedGpuOnly []
 

Detailed Description

Definition at line 30 of file stringart.cpp.

Constructor & Destructor Documentation

◆ StringArtGM()

StringArtGM::StringArtGM ( )
inline

Definition at line 32 of file stringart.cpp.

32: fNumSteps(kMaxNumSteps) {}
kMaxNumSteps
constexpr int kMaxNumSteps
Definition stringart.cpp:25

Member Function Documentation

◆ getISize()

SkISize StringArtGM::getISize ( )
inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 37 of file stringart.cpp.

37{ return SkISize::Make(kWidth, kHeight); }
kWidth
constexpr int kWidth
Definition stringart.cpp:22
kHeight
constexpr int kHeight
Definition stringart.cpp:23
SkISize::Make
static constexpr SkISize Make(int32_t w, int32_t h)
Definition SkSize.h:20

◆ getName()

SkString StringArtGM::getName ( ) const
inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 35 of file stringart.cpp.

35{ return SkString("stringart"); }

◆ onAnimate()

bool StringArtGM::onAnimate ( double  nanos)
inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 65 of file stringart.cpp.

65 {
66 constexpr SkScalar kDesiredDurationSecs = 3.0f;
67
68 // Make the animation ping-pong back and forth but start in the fully drawn state
69 SkScalar fraction = 1.0f - TimeUtils::Scaled(1e-9 * nanos, 2.0f/kDesiredDurationSecs, 2.0f);
70 if (fraction <= 0.0f) {
71 fraction = -fraction;
72 }
73
74 SkASSERT(fraction >= 0.0f && fraction <= 1.0f);
75
76 fNumSteps = (int) (fraction * kMaxNumSteps);
77 return true;
78 }
SkASSERT
#define SkASSERT(cond)
Definition SkAssert.h:116
int
Type::kYUV Type::kRGBA() int(0.7 *637)
SkScalar
float SkScalar
Definition extension.cpp:12
TimeUtils::Scaled
static float Scaled(float time, float speed, float period=0)
Definition TimeUtils.h:27

◆ onDraw()

void StringArtGM::onDraw ( SkCanvas *  canvas)
inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 39 of file stringart.cpp.

39 {
40 SkScalar angle = kAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
41 SkScalar size = SkIntToScalar(std::min(kWidth, kHeight));
42 SkPoint center = SkPoint::Make(SkScalarHalf(kWidth), SkScalarHalf(kHeight));
43 SkScalar length = 5;
44 SkScalar step = angle;
45
46 SkPath path;
47 path.moveTo(center);
48
49 for (int i = 0; i < fNumSteps && length < (SkScalarHalf(size) - 10.f); ++i) {
50 SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
51 length*SkScalarSin(step) + center.fY);
52 path.lineTo(rp);
53 length += angle / SkScalarHalf(SK_ScalarPI);
54 step += angle;
55 }
56
57 SkPaint paint;
58 paint.setAntiAlias(true);
59 paint.setStyle(SkPaint::kStroke_Style);
60 paint.setColor(ToolUtils::color_to_565(0xFF007700));
61
62 canvas->drawPath(path, paint);
63 }
step
static int step(int x, SkScalar min, SkScalar max)
Definition BlurTest.cpp:215
SkScalarSin
#define SkScalarSin(radians)
Definition SkScalar.h:45
SkScalarHalf
#define SkScalarHalf(a)
Definition SkScalar.h:75
SkIntToScalar
#define SkIntToScalar(x)
Definition SkScalar.h:57
SkScalarCos
#define SkScalarCos(radians)
Definition SkScalar.h:46
SK_ScalarPI
#define SK_ScalarPI
Definition SkScalar.h:21
center
static SkScalar center(float pos0, float pos1)
Definition TouchGesture.cpp:193
SkCanvas::drawPath
void drawPath(const SkPath &path, const SkPaint &paint)
Definition SkCanvas.cpp:2071
SkPaint::kStroke_Style
@ kStroke_Style
set to stroke geometry
Definition SkPaint.h:194
paint
const Paint & paint
Definition color_source.cc:38
length
size_t length
Definition key_event_handler.cc:41
ToolUtils::color_to_565
SkColor color_to_565(SkColor color)
Definition ToolUtils.cpp:139
flutter::path
DEF_SWITCHES_START aot vmservice shared library Name of the *so containing AOT compiled Dart assets for launching the service isolate vm snapshot The VM snapshot data that will be memory mapped as read only SnapshotAssetPath must be present isolate snapshot The isolate snapshot data that will be memory mapped as read only SnapshotAssetPath must be present cache dir path
Definition switches.h:57
flutter::size
it will be possible to load the file into Perfetto s trace viewer disable asset Prevents usage of any non test fonts unless they were explicitly Loaded via prefetched default font Indicates whether the embedding started a prefetch of the default font manager before creating the engine run In non interactive keep the shell running after the Dart script has completed enable serial On low power devices with low core running concurrent GC tasks on threads can cause them to contend with the UI thread which could potentially lead to jank This option turns off all concurrent GC activities domain network JSON encoded network policy per domain This overrides the DisallowInsecureConnections switch Embedder can specify whether to allow or disallow insecure connections at a domain level old gen heap size
Definition switches.h:259
kAngle
constexpr SkScalar kAngle
Definition stringart.cpp:24
SkPoint::Make
static constexpr SkPoint Make(float x, float y)
Definition SkPoint_impl.h:173
The documentation for this class was generated from the following file:
Generated on Fri Apr 26 2024 06:20:26 for Flutter Engine by doxygen 1.9.8