TestExtractAlphaGM Class Reference

Inheritance diagram for TestExtractAlphaGM:

Public Attributes
SkBitmap	fBitmap
SkBitmap	fAlpha

Protected Member Functions
SkString	getName () const override
SkISize	getISize () override
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

Private Member Functions
void	onOnceBeforeDraw () 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 []

Detailed Description

Definition at line 119 of file bitmapfilters.cpp.

Member Function Documentation

getISize()

SkISize TestExtractAlphaGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 143 of file bitmapfilters.cpp.

{ return SkISize::Make(540, 330); }

getName()

SkString TestExtractAlphaGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 141 of file bitmapfilters.cpp.

{ return SkString("extractalpha"); }

onDraw()

void TestExtractAlphaGM::onDraw ( SkCanvas *  canvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 145 of file bitmapfilters.cpp.

                                           {
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(SK_ColorRED);
 
        SkSamplingOptions sampling(SkFilterMode::kLinear);
 
        // should stay blue (ignore paint's color)
        canvas->drawImage(fBitmap.asImage(), 10, 10, sampling, &paint);
        // should draw red
        canvas->drawImage(fAlpha.asImage(), 120, 10, sampling, &paint);
    }

onOnceBeforeDraw()

void TestExtractAlphaGM::onOnceBeforeDraw ( )

inlineoverrideprivatevirtual

Reimplemented from skiagm::GM.

Definition at line 120 of file bitmapfilters.cpp.

                                     {
        // Make a bitmap with per-pixels alpha (stroked circle)
        fBitmap.allocN32Pixels(100, 100);
        SkCanvas canvas(fBitmap);
        canvas.clear(0);
 
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(SK_ColorBLUE);
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setStrokeWidth(20);
 
        canvas.drawCircle(50, 50, 39, paint);
 
        fBitmap.extractAlpha(&fAlpha);
    }

Member Data Documentation

fAlpha

SkBitmap TestExtractAlphaGM::fAlpha

Definition at line 138 of file bitmapfilters.cpp.

fBitmap

SkBitmap TestExtractAlphaGM::fBitmap

Definition at line 138 of file bitmapfilters.cpp.

---

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

• third_party/skia/gm/bitmapfilters.cpp