ChineseZoomSlide Class Reference

Inheritance diagram for ChineseZoomSlide:

Public Member Functions
	ChineseZoomSlide ()
bool	onChar (SkUnichar uni) override
void	draw (SkCanvas *canvas) override
void	load (SkScalar w, SkScalar h) override
void	createRandomLine (SkUnichar glyphs[45], int lineLength)
Public Member Functions inherited from Slide
virtual SkISize	getDimensions () const
virtual void	gpuTeardown ()
virtual bool	animate (double nanos)
virtual void	resize (SkScalar winWidth, SkScalar winHeight)
virtual void	unload ()
virtual bool	onMouse (SkScalar x, SkScalar y, skui::InputState state, skui::ModifierKey modifiers)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
const SkString &	getName ()
Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
virtual	~SkRefCntBase ()
bool	unique () const
void	ref () const
void	unref () const

Additional Inherited Members
Protected Attributes inherited from Slide
SkString	fName

Detailed Description

Definition at line 108 of file ChineseFlingSlide.cpp.

Constructor & Destructor Documentation

ChineseZoomSlide()

ChineseZoomSlide::ChineseZoomSlide ( )

inline

Definition at line 121 of file ChineseFlingSlide.cpp.

{ fName = "chinese-zoom"; }

Member Function Documentation

createRandomLine()

void ChineseZoomSlide::createRandomLine ( SkUnichar  glyphs[45], int  lineLength  )

inline

Definition at line 217 of file ChineseFlingSlide.cpp.

                                                                {
        for (auto i = 0; i < lineLength; ++i) {
            glyphs[i] = fRand.nextRangeU(0x4F00, 0x9FA0);
        }
    }

draw()

void ChineseZoomSlide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 135 of file ChineseFlingSlide.cpp.

                                         {
        canvas->clear(0xFFDDDDDD);
 
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(0xDE000000);
 
        if (fAfterFirstFrame) {
#if defined(SK_GANESH)
            auto direct = GrAsDirectContext(canvas->recordingContext());
            if (direct) {
                sk_sp<SkImage> image = direct->priv().testingOnly_getFontAtlasImage(MaskFormat::kA8,
                                                                                    0);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(10.0f, 10.0f, 512.0f, 512.0),
                                      SkSamplingOptions(), &paint);
                image = direct->priv().testingOnly_getFontAtlasImage(MaskFormat::kA8, 1);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(522.0f, 10.0f, 512.f, 512.0f),
                                      SkSamplingOptions(), &paint);
                image = direct->priv().testingOnly_getFontAtlasImage(MaskFormat::kA8, 2);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(10.0f, 522.0f, 512.0f, 512.0f),
                                      SkSamplingOptions(), &paint);
                image = direct->priv().testingOnly_getFontAtlasImage(MaskFormat::kA8, 3);
                canvas->drawImageRect(image,
                                      SkRect::MakeXYWH(522.0f, 522.0f, 512.0f, 512.0f),
                                      SkSamplingOptions(), &paint);
            }
#endif
        }
 
        canvas->scale(fScale, fScale);
        canvas->translate(0, fTranslate);
        fTranslate -= 0.5f;
 
        // draw a consistent run of the 'words' - one word per line
        SkScalar y = 0;
        for (int index = 0; index < kNumBlobs; ++index) {
            y += -fMetrics.fAscent;
            canvas->drawTextBlob(fBlobs[index], 0, y, paint);
 
            y += 3*(fMetrics.fDescent - fMetrics.fAscent + fMetrics.fLeading);
        }
        if (!fAfterFirstFrame) {
            fAfterFirstFrame = true;
        }
    }

load()

void ChineseZoomSlide::load ( SkScalar  w, SkScalar  h  )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 184 of file ChineseFlingSlide.cpp.

                                               {
        fTypeface = chinese_typeface();
 
        SkFont font(fTypeface, 11);
        font.getMetrics(&fMetrics);
 
        SkPaint paint;
        paint.setColor(0xDE000000);
 
        SkUnichar glyphs[45];
        for (int32_t i = 0; i < kNumBlobs; ++i) {
            SkTextBlobBuilder builder;
            auto paragraphLength = kParagraphLength;
            SkScalar y = 0;
            while (paragraphLength - 45 > 0) {
                auto currentLineLength = std::min(45, paragraphLength - 45);
                this->createRandomLine(glyphs, currentLineLength);
 
                ToolUtils::add_to_text_blob_w_len(&builder,
                                                  (const char*)glyphs,
                                                  currentLineLength * 4,
                                                  SkTextEncoding::kUTF32,
                                                  font,
                                                  0,
                                                  y);
                y += fMetrics.fDescent - fMetrics.fAscent + fMetrics.fLeading;
                paragraphLength -= 45;
            }
            fBlobs[i] = builder.make();
        }
    }

onChar()

bool ChineseZoomSlide::onChar ( SkUnichar  uni )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 123 of file ChineseFlingSlide.cpp.

                                        {
            if ('>' == uni) {
                fScale += 0.125f;
                return true;
            }
            if ('<' == uni) {
                fScale -= 0.125f;
                return true;
            }
            return false;
    }

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

• third_party/skia/tools/viewer/ChineseFlingSlide.cpp