skiagm::AnisotropicGM Class Reference

Inheritance diagram for skiagm::AnisotropicGM:

Public Types
enum class	Mode { kLinear , kMip , kAniso }
Public Types inherited from skiagm::GM
enum	Mode { kGM_Mode , kSample_Mode , kBench_Mode }
using	DrawResult = skiagm::DrawResult
using	GraphiteTestContext = skiatest::graphite::GraphiteTestContext

Public Member Functions
	AnisotropicGM (Mode mode)
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	onOnceBeforeDraw () override
void	draw (SkCanvas *canvas, int x, int y, int xSize, int ySize)
void	onDraw (SkCanvas *canvas) override
Protected Member Functions inherited from skiagm::GM
virtual DrawResult	onGpuSetup (SkCanvas *, SkString *, GraphiteTestContext *)
virtual void	onGpuTeardown ()
virtual DrawResult	onDraw (SkCanvas *, SkString *errorMsg)
virtual bool	onAnimate (double)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
GraphiteTestContext *	graphiteTestContext () const

Additional Inherited Members
Static Public Attributes inherited from skiagm::GM
static constexpr char	kErrorMsg_DrawSkippedGpuOnly []

Detailed Description

Definition at line 26 of file anisotropic.cpp.

Member Enumeration Documentation

Mode

enum class skiagm::AnisotropicGM::Mode

strong

Enumerator
kLinear
kMip
kAniso

Definition at line 28 of file anisotropic.cpp.

{ kLinear, kMip, kAniso };

Constructor & Destructor Documentation

AnisotropicGM()

skiagm::AnisotropicGM::AnisotropicGM ( Mode  mode )

inline

Definition at line 30 of file anisotropic.cpp.

                             : fMode(mode) {
        switch (fMode) {
            case Mode::kLinear:
                fSampling = SkSamplingOptions(SkFilterMode::kLinear);
                break;
            case Mode::kMip:
                fSampling = SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear);
                break;
            case Mode::kAniso:
                fSampling = SkSamplingOptions::Aniso(16);
                break;
        }
        this->setBGColor(0xFFCCCCCC);
    }

Member Function Documentation

draw()

void skiagm::AnisotropicGM::draw ( SkCanvas *  canvas, int  x, int  y, int  xSize, int  ySize  )

inlineprotected

Definition at line 94 of file anisotropic.cpp.

                                                                    {
        SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
                                    SkIntToScalar(xSize), SkIntToScalar(ySize));
        canvas->drawImageRect(fImage, r, fSampling);
    }

getISize()

SkISize skiagm::AnisotropicGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 62 of file anisotropic.cpp.

                                {
        return SkISize::Make(2*kImageSize + 3*kSpacer,
                             kNumVertImages*kImageSize + (kNumVertImages+1)*kSpacer);
    }

getName()

SkString skiagm::AnisotropicGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 46 of file anisotropic.cpp.

                                      {
        SkString name("anisotropic_image_scale_");
        switch (fMode) {
            case Mode::kLinear:
                name += "linear";
                break;
            case Mode::kMip:
                name += "mip";
                break;
            case Mode::kAniso:
                name += "aniso";
                break;
        }
        return name;
    }

onDraw()

void skiagm::AnisotropicGM::onDraw ( SkCanvas *  canvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 100 of file anisotropic.cpp.

                                           {
        SkScalar gScales[] = { 0.9f, 0.8f, 0.75f, 0.6f, 0.5f, 0.4f, 0.25f, 0.2f, 0.1f };
 
        SkASSERT(kNumVertImages-1 == (int)std::size(gScales)/2);
 
        // Minimize vertically
        for (int i = 0; i < (int)std::size(gScales); ++i) {
            int height = SkScalarFloorToInt(fImage->height() * gScales[i]);
 
            int yOff;
            if (i <= (int)std::size(gScales)/2) {
                yOff = kSpacer + i * (fImage->height() + kSpacer);
            } else {
                // Position the more highly squashed images with their less squashed counterparts
                yOff = (std::size(gScales) - i) * (fImage->height() + kSpacer) - height;
            }
 
            this->draw(canvas, kSpacer, yOff, fImage->width(), height);
        }
 
        // Minimize horizontally
        for (int i = 0; i < (int)std::size(gScales); ++i) {
            int width = SkScalarFloorToInt(fImage->width() * gScales[i]);
 
            int xOff, yOff;
            if (i <= (int)std::size(gScales)/2) {
                xOff = fImage->width() + 2*kSpacer;
                yOff = kSpacer + i * (fImage->height() + kSpacer);
            } else {
                // Position the more highly squashed images with their less squashed counterparts
                xOff = fImage->width() + 2*kSpacer + fImage->width() - width;
                yOff = kSpacer + (std::size(gScales) - i - 1) * (fImage->height() + kSpacer);
            }
 
            this->draw(canvas, xOff, yOff, width, fImage->height());
        }
    }

onOnceBeforeDraw()

void skiagm::AnisotropicGM::onOnceBeforeDraw ( )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 68 of file anisotropic.cpp.

                                     {
        constexpr int kNumLines = 100;
        constexpr SkScalar kAngleStep = 360.0f / kNumLines;
        constexpr int kInnerOffset = 10;
 
        auto info = SkImageInfo::MakeN32(kImageSize, kImageSize, kOpaque_SkAlphaType);
        auto surf = SkSurfaces::Raster(info);
        auto canvas = surf->getCanvas();
 
        canvas->clear(SK_ColorWHITE);
 
        SkPaint p;
        p.setAntiAlias(true);
 
        SkScalar angle = 0.0f, sin, cos;
 
        canvas->translate(kImageSize/2.0f, kImageSize/2.0f);
        for (int i = 0; i < kNumLines; ++i, angle += kAngleStep) {
            sin = SkScalarSin(angle);
            cos = SkScalarCos(angle);
            canvas->drawLine(cos * kInnerOffset, sin * kInnerOffset,
                             cos * kImageSize/2, sin * kImageSize/2, p);
        }
        fImage = surf->makeImageSnapshot();
    }

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

• third_party/skia/gm/anisotropic.cpp