ThresholdRT Class Reference

Inheritance diagram for ThresholdRT:

Public Member Functions
	ThresholdRT ()
void	onOnceBeforeDraw () override
void	onDraw (SkCanvas *canvas) override
Public Member Functions inherited from RuntimeShaderGM
	RuntimeShaderGM (const char *name, SkISize size, const char *sksl, uint32_t flags=0)
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

Public Attributes
sk_sp< SkShader >	fBefore
sk_sp< SkShader >	fAfter
sk_sp< SkShader >	fThreshold

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 130 of file runtimeshader.cpp.

Constructor & Destructor Documentation

ThresholdRT()

ThresholdRT::ThresholdRT ( )

inline

Definition at line 132 of file runtimeshader.cpp.

                  : RuntimeShaderGM("threshold_rt", {256, 256}, R"(
        uniform shader before_map;
        uniform shader after_map;
        uniform shader threshold_map;
 
        uniform float cutoff;
        uniform float slope;
 
        float smooth_cutoff(float x) {
            x = x * slope + (0.5 - slope * cutoff);
            return clamp(x, 0, 1);
        }
 
        half4 main(float2 xy) {
            half4 before = before_map.eval(xy);
            half4 after = after_map.eval(xy);
 
            float m = smooth_cutoff(threshold_map.eval(xy).a);
            return mix(before, after, m);
        }
    )", kAnimate_RTFlag | kBench_RTFlag) {}

Member Function Documentation

onDraw()

void ThresholdRT::onDraw ( SkCanvas *  canvas )

inlineoverridevirtual

Reimplemented from skiagm::GM.

Definition at line 165 of file runtimeshader.cpp.

                                           {
        SkRuntimeShaderBuilder builder(fEffect);
 
        builder.uniform("cutoff") = sinf(fSecs) * 0.55f + 0.5f;
        builder.uniform("slope")  = 10.0f;
 
        builder.child("before_map")    = fBefore;
        builder.child("after_map")     = fAfter;
        builder.child("threshold_map") = fThreshold;
 
        SkPaint paint;
        paint.setShader(builder.makeShader());
        canvas->drawRect({0, 0, 256, 256}, paint);
 
        auto draw = [&](SkScalar x, SkScalar y, sk_sp<SkShader> shader) {
            paint.setShader(shader);
            canvas->save();
            canvas->translate(x, y);
            canvas->drawRect({0, 0, 256, 256}, paint);
            canvas->restore();
        };
        draw(256,   0, fThreshold);
        draw(  0, 256, fBefore);
        draw(256, 256, fAfter);
    }

onOnceBeforeDraw()

void ThresholdRT::onOnceBeforeDraw ( )

inlineoverridevirtual

Reimplemented from RuntimeShaderGM.

Definition at line 156 of file runtimeshader.cpp.

                                     {
        const SkISize size = {256, 256};
        fThreshold = make_threshold(size);
        fBefore = make_shader(ToolUtils::GetResourceAsImage("images/mandrill_256.png"), size);
        fAfter = make_shader(ToolUtils::GetResourceAsImage("images/dog.jpg"), size);
 
        this->RuntimeShaderGM::onOnceBeforeDraw();
    }

Member Data Documentation

fAfter

sk_sp<SkShader> ThresholdRT::fAfter

Definition at line 154 of file runtimeshader.cpp.

fBefore

sk_sp<SkShader> ThresholdRT::fBefore

Definition at line 154 of file runtimeshader.cpp.

fThreshold

sk_sp<SkShader> ThresholdRT::fThreshold

Definition at line 154 of file runtimeshader.cpp.

---

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

• third_party/skia/gm/runtimeshader.cpp