RippleShaderGM Class Reference

Inheritance diagram for RippleShaderGM:

Public Member Functions
void	onOnceBeforeDraw () override
SkString	getName () const override
SkISize	getISize () override
bool	onAnimate (double nanos) override
void	onDraw (SkCanvas *canvas) override
float	sawtoothLerp (float a, float b, float windowMs)
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

Static Public Attributes
static constexpr SkISize	kSize = {512, 512}
Static Public Attributes inherited from skiagm::GM
static constexpr char	kErrorMsg_DrawSkippedGpuOnly []

Protected Attributes
sk_sp< SkRuntimeEffect >	fEffect
sk_sp< SkShader >	fMandrill
float	fMillis = 500.0f

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
Protected Member Functions inherited from skiagm::GM
virtual DrawResult	onGpuSetup (SkCanvas *, SkString *, GraphiteTestContext *)
virtual void	onGpuTeardown ()
virtual DrawResult	onDraw (SkCanvas *, SkString *errorMsg)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
GraphiteTestContext *	graphiteTestContext () const

Detailed Description

Definition at line 29 of file rippleshadergm.cpp.

Member Function Documentation

getISize()

SkISize RippleShaderGM::getISize ( )

inlineoverridevirtual

Implements skiagm::GM.

Definition at line 57 of file rippleshadergm.cpp.

{ return kSize; }

getName()

SkString RippleShaderGM::getName ( ) const

inlineoverridevirtual

Implements skiagm::GM.

Definition at line 56 of file rippleshadergm.cpp.

{ return SkString("rippleshader"); }

onAnimate()

bool RippleShaderGM::onAnimate ( double  nanos )

inlineoverridevirtual

Reimplemented from skiagm::GM.

Definition at line 58 of file rippleshadergm.cpp.

                                          {
        fMillis = nanos / (1000. * 1000.);
        return true;
    }

onDraw()

void RippleShaderGM::onDraw ( SkCanvas *  canvas )

inlineoverridevirtual

Reimplemented from skiagm::GM.

Definition at line 63 of file rippleshadergm.cpp.

                                           {
        SkPaint base;
        base.setShader(fMandrill);
        canvas->drawRect(SkRect::MakeWH(kSize.width(), kSize.height()), base);
 
        // Uniform setting logic was imperfectly adapted from:
        //     frameworks/base/graphics/java/android/graphics/drawable/RippleShader.java
        //     frameworks/base/graphics/java/android/graphics/drawable/RippleAnimationSession.java
 
        SkRuntimeShaderBuilder builder(fEffect);
        constexpr float ANIM_DURATION = 1500.0f;
        constexpr float NOISE_ANIMATION_DURATION = 7000.0f;
        constexpr float MAX_NOISE_PHASE = NOISE_ANIMATION_DURATION / 214.0f;
        constexpr float PI_ROTATE_RIGHT = SK_ScalarPI * 0.0078125f;
        constexpr float PI_ROTATE_LEFT = SK_ScalarPI * -0.0078125f;
 
        builder.uniform("in_origin")          = SkV2{kSize.width() / 2, kSize.height() / 2};
        builder.uniform("in_touch")           = SkV2{kSize.width() / 2, kSize.height() / 2};
        // Note that `in_progress` should actually be interpolated via FAST_OUT_SLOW_IN.
        builder.uniform("in_progress")        = this->sawtoothLerp(0.0f, 1.0f, ANIM_DURATION);
        builder.uniform("in_maxRadius")       = 400.0f;
        builder.uniform("in_resolutionScale") = SkV2{1.0f / kSize.width(), 1.0f / kSize.height()};
        builder.uniform("in_noiseScale")      = SkV2{2.1f / kSize.width(), 2.1f / kSize.height()};
        builder.uniform("in_hasMask")         = 1.0f;
 
        float phase = this->sawtoothLerp(0, MAX_NOISE_PHASE, NOISE_ANIMATION_DURATION);
        builder.uniform("in_noisePhase")      = phase;
        builder.uniform("in_turbulencePhase") = phase * 1000.0f;
 
        const float scale = 1.5f;
        builder.uniform("in_tCircle1") = SkV2{scale * .5f + (phase * 0.01f * cosf(scale * .55f)),
                                              scale * .5f + (phase * 0.01f * sinf(scale * .55f))};
        builder.uniform("in_tCircle2") = SkV2{scale * .2f + (phase * -.0066f * cosf(scale * .45f)),
                                              scale * .2f + (phase * -.0066f * sinf(scale * .45f))};
        builder.uniform("in_tCircle3") = SkV2{scale + (phase * -.0066f * cosf(scale * .35f)),
                                              scale + (phase * -.0066f * sinf(scale * .35f))};
 
        float rotation1 = phase * PI_ROTATE_RIGHT + 1.7f * SK_ScalarPI;
        builder.uniform("in_tRotation1") = SkV2{cosf(rotation1), sinf(rotation1)};
 
        float rotation2 = phase * PI_ROTATE_LEFT + 2.0f * SK_ScalarPI;
        builder.uniform("in_tRotation2") = SkV2{cosf(rotation2), sinf(rotation2)};
 
        float rotation3 = phase * PI_ROTATE_RIGHT + 2.75f * SK_ScalarPI;
        builder.uniform("in_tRotation3") = SkV2{cosf(rotation3), sinf(rotation3)};
 
        builder.uniform("in_color") = SkV4{0.0f, 0.6f, 0.0f, 1.0f};         // green
        builder.uniform("in_sparkleColor") = SkV4{1.0f, 1.0f, 1.0f, 1.0f};  // white
        builder.child("in_shader") = fMandrill;
 
        SkPaint sparkle;
        sparkle.setShader(builder.makeShader());
        canvas->drawRect(SkRect::MakeWH(kSize.width(), kSize.height()), sparkle);
    }

onOnceBeforeDraw()

void RippleShaderGM::onOnceBeforeDraw ( )

inlineoverridevirtual

Reimplemented from skiagm::GM.

Definition at line 33 of file rippleshadergm.cpp.

                                     {
        // Load the mandrill into a shader.
        sk_sp<SkImage> img = ToolUtils::GetResourceAsImage("images/mandrill_512.png");
        if (!img) {
            SkDebugf("Unable to load mandrill_512 from resources directory");
            return;
        }
        fMandrill = img->makeShader(SkSamplingOptions());
 
        // Load RippleShader.rts into a SkRuntimeEffect.
        sk_sp<SkData> shaderData = GetResourceAsData("sksl/realistic/RippleShader.rts");
        if (!shaderData) {
            SkDebugf("Unable to load ripple shader from resources directory");
            return;
        }
        auto [effect, error] = SkRuntimeEffect::MakeForShader(
                SkString(static_cast<const char*>(shaderData->data()), shaderData->size()));
        if (!effect) {
            SkDebugf("Ripple shader failed to compile\n\n%s\n", error.c_str());
        }
        fEffect = std::move(effect);
    }

sawtoothLerp()

float RippleShaderGM::sawtoothLerp ( float  a, float  b, float  windowMs  )

inline

Definition at line 118 of file rippleshadergm.cpp.

                                                         {
        float t = std::fmod(fMillis, windowMs) / windowMs;
        return a * (1. - t) + b * t;
    }

Member Data Documentation

fEffect

sk_sp<SkRuntimeEffect> RippleShaderGM::fEffect

protected

Definition at line 124 of file rippleshadergm.cpp.

fMandrill

sk_sp<SkShader> RippleShaderGM::fMandrill

protected

Definition at line 125 of file rippleshadergm.cpp.

fMillis

float RippleShaderGM::fMillis = 500.0f

protected

Definition at line 126 of file rippleshadergm.cpp.

kSize

constexpr SkISize RippleShaderGM::kSize = {512, 512}

staticconstexpr

Definition at line 31 of file rippleshadergm.cpp.

{512, 512};

---

The documentation for this class was generated from the following file:

• third_party/skia/gm/rippleshadergm.cpp