SpiralRT Class Reference

Inheritance diagram for SpiralRT:

Public Member Functions
	SpiralRT ()
void	onDraw (SkCanvas *canvas) override
Public Member Functions inherited from RuntimeShaderGM
	RuntimeShaderGM (const char *name, SkISize size, const char *sksl, uint32_t flags=0)
void	onOnceBeforeDraw () override
bool	runAsBench () const override
SkString	getName () const override
SkISize	getISize () override
bool	onAnimate (double nanos) override
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)
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

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 []
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
Protected Attributes inherited from RuntimeShaderGM
SkString	fName
SkISize	fSize
uint32_t	fFlags
float	fSecs = 0.0f
SkString	fSkSL
sk_sp< SkRuntimeEffect >	fEffect

Detailed Description

Definition at line 193 of file runtimeshader.cpp.

Constructor & Destructor Documentation

SpiralRT()

SpiralRT::SpiralRT ( )

inline

Definition at line 195 of file runtimeshader.cpp.

               : RuntimeShaderGM("spiral_rt", {512, 512}, R"(
        uniform float rad_scale;
        uniform float2 in_center;
        layout(color) uniform float4 in_colors0;
        layout(color) uniform float4 in_colors1;
 
        half4 main(float2 p) {
            float2 pp = p - in_center;
            float radius = length(pp);
            radius = sqrt(radius);
            float angle = atan(pp.y / pp.x);
            float t = (angle + 3.1415926/2) / (3.1415926);
            t += radius * rad_scale;
            t = fract(t);
            return in_colors0 * (1-t) + in_colors1 * t;
        }
    )", kAnimate_RTFlag | kBench_RTFlag) {}

Member Function Documentation

onDraw()

void SpiralRT::onDraw ( SkCanvas *  canvas )

inlineoverridevirtual

Reimplemented from skiagm::GM.

Definition at line 213 of file runtimeshader.cpp.

                                           {
        SkRuntimeShaderBuilder builder(fEffect);
 
        builder.uniform("rad_scale")  = std::sin(fSecs * 0.5f + 2.0f) / 5;
        builder.uniform("in_center")  = SkV2{256, 256};
        builder.uniform("in_colors0") = SkColors::kRed;
        builder.uniform("in_colors1") = SkColors::kGreen;
 
        SkPaint paint;
        paint.setShader(builder.makeShader());
        canvas->drawRect({0, 0, 512, 512}, paint);
    }

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

• third_party/skia/gm/runtimeshader.cpp