DFTextGM Class Reference

Inheritance diagram for DFTextGM:

Public Member Functions
	DFTextGM ()
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
void	onOnceBeforeDraw () override
SkString	getName () const override
SkISize	getISize () override
void	onDraw (SkCanvas *inputCanvas) 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
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 40 of file dftext.cpp.

Constructor & Destructor Documentation

DFTextGM()

DFTextGM::DFTextGM ( )

inline

Definition at line 42 of file dftext.cpp.

               {
        this->setBGColor(0xFFFFFFFF);
    }

Member Function Documentation

getISize()

SkISize DFTextGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 51 of file dftext.cpp.

{ return SkISize::Make(1024, 768); }

getName()

SkString DFTextGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 49 of file dftext.cpp.

{ return SkString("dftext"); }

onDraw()

void DFTextGM::onDraw ( SkCanvas *  inputCanvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 53 of file dftext.cpp.

                                                {
        SkScalar textSizes[] = { 9.0f, 9.0f*2.0f, 9.0f*5.0f, 9.0f*2.0f*5.0f };
        SkScalar scales[] = { 2.0f*5.0f, 5.0f, 2.0f, 1.0f };
 
        // set up offscreen rendering with distance field text
        auto ctx = inputCanvas->recordingContext();
        SkISize size = getISize();
        SkImageInfo info = SkImageInfo::MakeN32(size.width(), size.height(), kPremul_SkAlphaType,
                                                inputCanvas->imageInfo().refColorSpace());
        SkSurfaceProps inputProps;
        inputCanvas->getProps(&inputProps);
        SkSurfaceProps props(SkSurfaceProps::kUseDeviceIndependentFonts_Flag | inputProps.flags(),
                             inputProps.pixelGeometry());
        auto surface(SkSurfaces::RenderTarget(ctx, skgpu::Budgeted::kNo, info, 0, &props));
        SkCanvas* canvas = surface ? surface->getCanvas() : inputCanvas;
        // init our new canvas with the old canvas's matrix
        canvas->setMatrix(inputCanvas->getLocalToDeviceAs3x3());
        // apply global scale to test glyph positioning
        canvas->scale(1.05f, 1.05f);
        canvas->clear(0xffffffff);
 
        SkPaint paint;
        paint.setAntiAlias(true);
 
        SkFont font(ToolUtils::CreatePortableTypeface("serif", SkFontStyle()));
        font.setSubpixel(true);
 
        const char* text = "Hamburgefons";
        const size_t textLen = strlen(text);
 
        // check scaling up
        SkScalar x = SkIntToScalar(0);
        SkScalar y = SkIntToScalar(78);
        for (size_t i = 0; i < std::size(textSizes); ++i) {
            SkAutoCanvasRestore acr(canvas, true);
            canvas->translate(x, y);
            canvas->scale(scales[i], scales[i]);
            font.setSize(textSizes[i]);
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, 0, 0, font, paint);
            y += font.getMetrics(nullptr)*scales[i];
        }
 
        // check rotation
        for (size_t i = 0; i < 5; ++i) {
            SkScalar rotX = SkIntToScalar(10);
            SkScalar rotY = y;
 
            SkAutoCanvasRestore acr(canvas, true);
            canvas->translate(SkIntToScalar(10 + i * 200), -80);
            canvas->rotate(SkIntToScalar(i * 5), rotX, rotY);
            for (int ps = 6; ps <= 32; ps += 3) {
                font.setSize(SkIntToScalar(ps));
                canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, rotX, rotY, font, paint);
                rotY += font.getMetrics(nullptr);
            }
        }
 
        // check scaling down
        font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
        x = SkIntToScalar(680);
        y = SkIntToScalar(20);
        size_t arraySize = std::size(textSizes);
        for (size_t i = 0; i < arraySize; ++i) {
            SkAutoCanvasRestore acr(canvas, true);
            canvas->translate(x, y);
            SkScalar scaleFactor = SkScalarInvert(scales[arraySize - i - 1]);
            canvas->scale(scaleFactor, scaleFactor);
            font.setSize(textSizes[i]);
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, 0, 0, font, paint);
            y += font.getMetrics(nullptr)*scaleFactor;
        }
 
        // check pos text
        {
            SkAutoCanvasRestore acr(canvas, true);
 
            canvas->scale(2.0f, 2.0f);
 
            AutoTArray<SkGlyphID> glyphs(SkToInt(textLen));
            int count = font.textToGlyphs(text, textLen, SkTextEncoding::kUTF8, glyphs.get(), textLen);
            AutoTArray<SkPoint>  pos(count);
            font.setSize(textSizes[0]);
            font.getPos(glyphs.get(), count, pos.get(), {340, 75});
 
            auto blob = SkTextBlob::MakeFromPosText(glyphs.get(), count * sizeof(SkGlyphID),
                                                    pos.get(), font, SkTextEncoding::kGlyphID);
            canvas->drawTextBlob(blob, 0, 0, paint);
        }
 
 
        // check gamma-corrected blending
        const SkColor fg[] = {
            0xFFFFFFFF,
            0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF,
            0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
            0xFF000000,
        };
 
        paint.setColor(0xFFF7F3F7);
        SkRect r = SkRect::MakeLTRB(670, 215, 820, 397);
        canvas->drawRect(r, paint);
 
        x = SkIntToScalar(680);
        y = SkIntToScalar(235);
        font.setSize(SkIntToScalar(19));
        for (size_t i = 0; i < std::size(fg); ++i) {
            paint.setColor(fg[i]);
 
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, x, y, font, paint);
            y += font.getMetrics(nullptr);
        }
 
        paint.setColor(0xFF181C18);
        r = SkRect::MakeLTRB(820, 215, 970, 397);
        canvas->drawRect(r, paint);
 
        x = SkIntToScalar(830);
        y = SkIntToScalar(235);
        font.setSize(SkIntToScalar(19));
        for (size_t i = 0; i < std::size(fg); ++i) {
            paint.setColor(fg[i]);
 
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, x, y, font, paint);
            y += font.getMetrics(nullptr);
        }
 
        // check skew
        {
            font.setEdging(SkFont::Edging::kAntiAlias);
            SkAutoCanvasRestore acr(canvas, true);
            canvas->skew(0.0f, 0.151515f);
            font.setSize(SkIntToScalar(32));
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, 745, 70, font, paint);
        }
        {
            font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
            SkAutoCanvasRestore acr(canvas, true);
            canvas->skew(0.5f, 0.0f);
            font.setSize(SkIntToScalar(32));
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, 580, 125, font, paint);
        }
 
        // check perspective
        {
            font.setEdging(SkFont::Edging::kAntiAlias);
            SkAutoCanvasRestore acr(canvas, true);
            SkMatrix persp;
            persp.setAll(0.9839f, 0, 0,
                         0.2246f, 0.6829f, 0,
                         0.0002352f, -0.0003844f, 1);
            canvas->concat(persp);
            canvas->translate(1100, -295);
            font.setSize(37.5f);
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, 0, 0, font, paint);
        }
        {
            font.setSubpixel(false);
            font.setEdging(SkFont::Edging::kAlias);
            SkAutoCanvasRestore acr(canvas, true);
            SkMatrix persp;
            persp.setAll(0.9839f, 0, 0,
                         0.2246f, 0.6829f, 0,
                         0.0002352f, -0.0003844f, 1);
            canvas->concat(persp);
            canvas->translate(1075, -245);
            canvas->scale(375, 375);
            font.setSize(0.1f);
            canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, 0, 0, font, paint);
        }
 
        // check color emoji
        if (fEmojiSample.typeface) {
            SkFont emojiFont;
            emojiFont.setSubpixel(true);
            emojiFont.setTypeface(fEmojiSample.typeface);
            emojiFont.setSize(SkIntToScalar(19));
            canvas->drawSimpleText(fEmojiSample.sampleText,
                                   strlen(fEmojiSample.sampleText),
                                   SkTextEncoding::kUTF8,
                                   670,
                                   90,
                                   emojiFont,
                                   paint);
        }
 
        // render offscreen buffer
        if (surface) {
            SkAutoCanvasRestore acr(inputCanvas, true);
            // since we prepended this matrix already, we blit using identity
            inputCanvas->resetMatrix();
            inputCanvas->drawImage(surface->makeImageSnapshot().get(), 0, 0);
        }
    }

onOnceBeforeDraw()

void DFTextGM::onOnceBeforeDraw ( )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 47 of file dftext.cpp.

{ fEmojiSample = ToolUtils::EmojiSample(); }

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

• third_party/skia/gm/dftext.cpp