skiagm::DrawImageSetAlphaOnlyGM Class Reference

Inheritance diagram for skiagm::DrawImageSetAlphaOnlyGM:

Private Member Functions
SkString	getName () const override
SkISize	getISize () override
DrawResult	onGpuSetup (SkCanvas *canvas, SkString *, GraphiteTestContext *) override
void	onDraw (SkCanvas *canvas) override

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
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 inherited from skiagm::GM
static constexpr char	kErrorMsg_DrawSkippedGpuOnly []
Protected Member Functions inherited from skiagm::GM
virtual void	onGpuTeardown ()
virtual void	onOnceBeforeDraw ()
virtual DrawResult	onDraw (SkCanvas *, SkString *errorMsg)
virtual bool	onAnimate (double)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
GraphiteTestContext *	graphiteTestContext () const

Detailed Description

Definition at line 296 of file drawimageset.cpp.

Member Function Documentation

getISize()

SkISize skiagm::DrawImageSetAlphaOnlyGM::getISize ( )

inlineoverrideprivatevirtual

Implements skiagm::GM.

Definition at line 299 of file drawimageset.cpp.

{ return {kM * kTileW, 2 * kN * kTileH}; }

getName()

SkString skiagm::DrawImageSetAlphaOnlyGM::getName ( ) const

inlineoverrideprivatevirtual

Implements skiagm::GM.

Definition at line 298 of file drawimageset.cpp.

{ return SkString("draw_image_set_alpha_only"); }

onDraw()

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

inlineoverrideprivatevirtual

Reimplemented from skiagm::GM.

Definition at line 335 of file drawimageset.cpp.

                                           {
        ToolUtils::draw_checkerboard(canvas, SK_ColorGRAY, SK_ColorDKGRAY, 25);
 
        SkPaint paint;
        paint.setBlendMode(SkBlendMode::kSrcOver);
        paint.setColor4f({0.2f, 0.8f, 0.4f, 1.f}); // colorizes even rows, no effect on odd rows
 
        // Top rows use experimental edge set API
        canvas->experimental_DrawEdgeAAImageSet(fSet, kM * kN, nullptr, nullptr,
                                                SkSamplingOptions(SkFilterMode::kLinear), &paint,
                                                SkCanvas::kFast_SrcRectConstraint);
 
        canvas->translate(0.f, kN * kTileH);
 
        // Bottom rows draw each image from the set using the regular API
        for (int y = 0; y < kN; ++y) {
            for (int x = 0; x < kM; ++x) {
                int i = y * kM + x;
                SkPaint entryPaint = paint;
                entryPaint.setAlphaf(fSet[i].fAlpha * paint.getAlphaf());
                sk_sp<SkImage> orig = sk_ref_sp(const_cast<SkImage*>(fSet[i].fImage.get()));
                canvas->drawImageRect(ToolUtils::MakeTextureImage(canvas, std::move(orig)),
                                      fSet[i].fSrcRect, fSet[i].fDstRect,
                                      SkSamplingOptions(), &entryPaint,
                                      SkCanvas::kFast_SrcRectConstraint);
            }
        }
    }

onGpuSetup()

DrawResult skiagm::DrawImageSetAlphaOnlyGM::onGpuSetup ( SkCanvas *  canvas, SkString *  , GraphiteTestContext *    )

inlineoverrideprivatevirtual

Reimplemented from skiagm::GM.

Definition at line 301 of file drawimageset.cpp.

                                                                                      {
        auto direct = GrAsDirectContext(canvas->recordingContext());
#if defined(SK_GRAPHITE)
        auto recorder = canvas->recorder();
#endif
        static constexpr SkColor kColors[] = {SK_ColorBLUE, SK_ColorTRANSPARENT,
                                              SK_ColorRED,  SK_ColorTRANSPARENT};
        static constexpr SkColor kBGColor = SkColorSetARGB(128, 128, 128, 128);
        make_image_tiles(kTileW, kTileH, kM, kN, kColors, fSet, kBGColor);
 
        // Modify the alpha of the entries, decreasing by column, and convert even rows to
        // alpha-only textures.
        sk_sp<SkColorSpace> alphaSpace = SkColorSpace::MakeSRGB();
        for (int y = 0; y < kN; ++y) {
            for (int x = 0; x < kM; ++x) {
                int i = y * kM + x;
                fSet[i].fAlpha = (kM - x) / (float) kM;
                if (y % 2 == 0) {
#if defined(SK_GRAPHITE)
                    if (recorder) {
                        fSet[i].fImage = fSet[i].fImage->makeColorTypeAndColorSpace(
                                recorder, kAlpha_8_SkColorType, alphaSpace, {});
                    } else
#endif
                    {
                        fSet[i].fImage = fSet[i].fImage->makeColorTypeAndColorSpace(
                                direct, kAlpha_8_SkColorType, alphaSpace);
                    }
                }
            }
        }
        return skiagm::DrawResult::kOk;
    }

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

• third_party/skia/gm/drawimageset.cpp