skiagm::TextBlobRandomFont Class Reference

Inheritance diagram for skiagm::TextBlobRandomFont:

Public Member Functions
	TextBlobRandomFont ()
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
void	onOnceBeforeDraw () override
SkString	getName () const override
SkISize	getISize () override
DrawResult	onDraw (SkCanvas *canvas, SkString *errorMsg) 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 36 of file textblobrandomfont.cpp.

Constructor & Destructor Documentation

TextBlobRandomFont()

skiagm::TextBlobRandomFont::TextBlobRandomFont ( )

inline

Definition at line 40 of file textblobrandomfont.cpp.

{ }

Member Function Documentation

getISize()

SkISize skiagm::TextBlobRandomFont::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 101 of file textblobrandomfont.cpp.

{ return SkISize::Make(kWidth, kHeight); }

getName()

SkString skiagm::TextBlobRandomFont::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 99 of file textblobrandomfont.cpp.

{ return SkString("textblobrandomfont"); }

onDraw()

DrawResult skiagm::TextBlobRandomFont::onDraw ( SkCanvas *  canvas, SkString *  errorMsg  )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 103 of file textblobrandomfont.cpp.

                                                                     {
        GrDirectContext* dContext = GrAsDirectContext(canvas->recordingContext());
        bool isGPU = SkToBool(dContext);
 
#if defined(SK_GRAPHITE)
        skgpu::graphite::Recorder* recorder = canvas->recorder();
        isGPU = isGPU || SkToBool(recorder);
#endif
 
        if (!isGPU) {
            *errorMsg = skiagm::GM::kErrorMsg_DrawSkippedGpuOnly;
            return skiagm::DrawResult::kSkip;
        }
 
        // This GM uses ToolUtils::makeSurface which doesn't work well with vias.
        // This GM uses SkRandomTypeface which doesn't work well with serialization.
        canvas->drawColor(SK_ColorWHITE);
 
        SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, canvas->imageInfo().colorType(),
                                             kPremul_SkAlphaType,
                                             canvas->imageInfo().refColorSpace());
        SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
        auto           surface(ToolUtils::makeSurface(canvas, info, &props));
        if (!surface) {
            *errorMsg = "This test requires a surface";
            return DrawResult::kFail;
        }
 
        SkPaint paint;
        paint.setAntiAlias(true);
 
        SkCanvas* surfaceCanvas = surface->getCanvas();
 
        SkScalar stride = SkScalarCeilToScalar(fBlob->bounds().height());
        SkScalar yOffset = 5;
 
        canvas->save();
        // Originally we would alternate between rotating and not to force blob regeneration,
        // but that code seems to have rotted. Keeping the rotate to match the old GM as
        // much as possible, and it seems like a reasonable stress test for transformed
        // color emoji.
        canvas->rotate(-0.05f);
        canvas->drawTextBlob(fBlob, 10, yOffset, paint);
        yOffset += stride;
        canvas->restore();
 
        // Rotate in the surface canvas, not the final canvas, to avoid aliasing
        surfaceCanvas->rotate(-0.05f);
        surfaceCanvas->drawTextBlob(fBlob, 10, yOffset, paint);
        surface->draw(canvas, 0, 0);
        yOffset += stride;
 
        if (dContext) {
            // free gpu resources and verify
            dContext->freeGpuResources();
        }
 
        canvas->rotate(-0.05f);
        canvas->drawTextBlob(fBlob, 10, yOffset, paint);
        yOffset += stride;
        return DrawResult::kOk;
    }

onOnceBeforeDraw()

void skiagm::TextBlobRandomFont::onOnceBeforeDraw ( )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 43 of file textblobrandomfont.cpp.

                                     {
        SkTextBlobBuilder builder;
 
        const char* text = "The quick brown fox jumps over the lazy dog.";
 
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(SK_ColorMAGENTA);
 
        // make textbloben
        SkFont font;
        font.setSize(32);
        font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
 
        // Setup our random scaler context
        auto typeface = ToolUtils::CreatePortableTypeface("sans-serif", SkFontStyle::Bold());
        SkASSERT(typeface);
        font.setTypeface(sk_make_sp<SkRandomTypeface>(std::move(typeface), paint, false));
 
        SkScalar y = 0;
        SkRect bounds;
        font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
        y -= bounds.fTop;
        ToolUtils::add_to_text_blob(&builder, text, font, 0, y);
        y += bounds.fBottom;
 
        // A8
        const char* bigtext1 = "The quick brown fox";
        const char* bigtext2 = "jumps over the lazy dog.";
        font.setSize(160);
        font.setSubpixel(false);
        font.setEdging(SkFont::Edging::kAntiAlias);
        font.measureText(bigtext1, strlen(bigtext1), SkTextEncoding::kUTF8, &bounds);
        y -= bounds.fTop;
        ToolUtils::add_to_text_blob(&builder, bigtext1, font, 0, y);
        y += bounds.fBottom;
 
        font.measureText(bigtext2, strlen(bigtext2), SkTextEncoding::kUTF8, &bounds);
        y -= bounds.fTop;
        ToolUtils::add_to_text_blob(&builder, bigtext2, font, 0, y);
        y += bounds.fBottom;
 
        // color emoji
        ToolUtils::EmojiTestSample sample = ToolUtils::EmojiSample();
        if (sample.typeface) {
            font.setTypeface(sk_make_sp<SkRandomTypeface>(sample.typeface, paint, false));
            font.measureText(sample.sampleText, strlen(sample.sampleText), SkTextEncoding::kUTF8, &bounds);
            y -= bounds.fTop;
            ToolUtils::add_to_text_blob(&builder, sample.sampleText, font, 0, y);
            y += bounds.fBottom;
        }
 
        // build
        fBlob = builder.make();
    }

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

• third_party/skia/gm/textblobrandomfont.cpp