FillrectGradientGM Class Reference

Inheritance diagram for FillrectGradientGM:

Classes
struct	GradientStop

Public Member Functions
	FillrectGradientGM ()
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 SkISize	getISize ()=0
virtual SkString	getName () const =0
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	drawGradient (SkCanvas *canvas, std::initializer_list< GradientStop > stops)
void	onDraw (SkCanvas *canvas) 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 void	onDraw (SkCanvas *)
virtual bool	onAnimate (double)
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 34 of file fillrect_gradient.cpp.

Constructor & Destructor Documentation

FillrectGradientGM()

FillrectGradientGM::FillrectGradientGM ( )

inline

Definition at line 36 of file fillrect_gradient.cpp.

{}

Member Function Documentation

drawGradient()

void FillrectGradientGM::drawGradient ( SkCanvas *  canvas, std::initializer_list< GradientStop >  stops  )

inlineprotected

Definition at line 51 of file fillrect_gradient.cpp.

                                                                                 {
        std::vector<SkColor> colors;
        std::vector<SkScalar> positions;
        colors.reserve(stops.size());
        positions.reserve(stops.size());
 
        for (const GradientStop& stop : stops) {
            colors.push_back(stop.color);
            positions.push_back(stop.pos);
        }
 
        static constexpr SkPoint points[] = {
            SkPoint::Make(kCellSize, 0),
            SkPoint::Make(kCellSize, kCellSize),
        };
 
        // Draw the gradient linearly.
        sk_sp<SkShader> shader = SkGradientShader::MakeLinear(points,
                                                              colors.data(),
                                                              positions.data(),
                                                              colors.size(),
                                                              SkTileMode::kClamp);
        SkPaint paint;
        paint.setShader(shader);
        canvas->drawRect(SkRect::MakeXYWH(0, 0, kCellSize, kCellSize), paint);
 
        canvas->save();
        canvas->translate(kCellSize + kPadSize, 0);
 
        // Draw the gradient radially.
        shader = SkGradientShader::MakeRadial(SkPoint::Make(kCellSize / 2, kCellSize / 2),
                                              kCellSize / 2,
                                              colors.data(),
                                              positions.data(),
                                              colors.size(),
                                              SkTileMode::kClamp);
        paint.setShader(shader);
        canvas->drawRect(SkRect::MakeXYWH(0, 0, kCellSize, kCellSize), paint);
 
        canvas->restore();
        canvas->translate(0, kCellSize + kPadSize);
    }

getISize()

SkISize FillrectGradientGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 46 of file fillrect_gradient.cpp.

                                {
        return SkISize::Make(kNumColumns * (kCellSize + kPadSize),
                             kNumRows * (kCellSize + kPadSize));
    }

getName()

SkString FillrectGradientGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 44 of file fillrect_gradient.cpp.

{ return SkString("fillrect_gradient"); }

onDraw()

void FillrectGradientGM::onDraw ( SkCanvas *  canvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 94 of file fillrect_gradient.cpp.

                                           {
        // Simple gradient: Green to white
        this->drawGradient(canvas, {{0.0f, SK_ColorGREEN}, {1.0f, SK_ColorWHITE}});
 
        // Multiple sections: Green to white to red
        this->drawGradient(canvas,
                           {{0.0f, SK_ColorGREEN}, {0.5f, SK_ColorWHITE}, {1.0f, SK_ColorRED}});
 
        // No stops at 0.0 or 1.0: Larger green to white to larger red
        this->drawGradient(canvas,
                           {{0.4f, SK_ColorGREEN}, {0.5f, SK_ColorWHITE}, {0.6f, SK_ColorRED}});
 
        // Only one stop, at zero: Solid red
        this->drawGradient(canvas, {{0.0f, SK_ColorRED}});
 
        // Only one stop, at 1.0: Solid red
        this->drawGradient(canvas, {{1.0f, SK_ColorRED}});
 
        // Only one stop, in the middle: Solid red
        this->drawGradient(canvas, {{0.5f, SK_ColorRED}});
 
        // Disjoint gradients (multiple stops at the same offset)
        // Blue to white in the top (inner) half, red to yellow in the bottom (outer) half
        this->drawGradient(canvas,
                           {{0.0f, SK_ColorBLUE},
                            {0.5f, SK_ColorWHITE},
                            {0.5f, SK_ColorRED},
                            {1.0f, SK_ColorYELLOW}});
 
        // Ignored stops: Blue to white, red to yellow (same as previous)
        this->drawGradient(canvas,
                           {{0.0f, SK_ColorBLUE},
                            {0.5f, SK_ColorWHITE},
                            {0.5f, SK_ColorGRAY},
                            {0.5f, SK_ColorCYAN},
                            {0.5f, SK_ColorRED},
                            {1.0f, SK_ColorYELLOW}});
 
        // Unsorted stops: Blue to white, red to yellow
        // Unlike Chrome, we don't sort the stops, so this renders differently than the prior cell.
        this->drawGradient(canvas,
                           {{0.5f, SK_ColorWHITE},
                            {0.5f, SK_ColorGRAY},
                            {1.0f, SK_ColorYELLOW},
                            {0.5f, SK_ColorCYAN},
                            {0.5f, SK_ColorRED},
                            {0.0f, SK_ColorBLUE}});
    }

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

• third_party/skia/gm/fillrect_gradient.cpp