TextBlobShaderGM Class Reference

Inheritance diagram for TextBlobShaderGM:

Public Member Functions
	TextBlobShaderGM ()
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

Private Member Functions
void	onOnceBeforeDraw () override
SkString	getName () const override
SkISize	getISize () 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
Static Public Attributes inherited from skiagm::GM
static constexpr char	kErrorMsg_DrawSkippedGpuOnly []
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

Detailed Description

Definition at line 33 of file textblobshader.cpp.

Constructor & Destructor Documentation

TextBlobShaderGM()

TextBlobShaderGM::TextBlobShaderGM ( )

inline

Definition at line 35 of file textblobshader.cpp.

{}

Member Function Documentation

getISize()

SkISize TextBlobShaderGM::getISize ( )

inlineoverrideprivatevirtual

Implements skiagm::GM.

Definition at line 93 of file textblobshader.cpp.

{ return SkISize::Make(640, 480); }

getName()

SkString TextBlobShaderGM::getName ( ) const

inlineoverrideprivatevirtual

Implements skiagm::GM.

Definition at line 91 of file textblobshader.cpp.

{ return SkString("textblobshader"); }

onDraw()

void TextBlobShaderGM::onDraw ( SkCanvas *  canvas )

inlineoverrideprivatevirtual

Reimplemented from skiagm::GM.

Definition at line 95 of file textblobshader.cpp.

                                           {
        SkPaint p;
        p.setAntiAlias(true);
        p.setStyle(SkPaint::kFill_Style);
        p.setShader(fShader);
 
        SkISize sz = this->getISize();
        constexpr int kXCount = 4;
        constexpr int kYCount = 3;
        for (int i = 0; i < kXCount; ++i) {
            for (int j = 0; j < kYCount; ++j) {
                canvas->drawTextBlob(fBlob,
                                     SkIntToScalar(i * sz.width() / kXCount),
                                     SkIntToScalar(j * sz.height() / kYCount),
                                     p);
            }
        }
    }

onOnceBeforeDraw()

void TextBlobShaderGM::onOnceBeforeDraw ( )

inlineoverrideprivatevirtual

Reimplemented from skiagm::GM.

Definition at line 38 of file textblobshader.cpp.

                                     {
        {
            SkFont      font = ToolUtils::DefaultPortableFont();
            const char* txt = "Blobber";
            size_t txtLen = strlen(txt);
            fGlyphs.append(font.countText(txt, txtLen, SkTextEncoding::kUTF8));
            font.textToGlyphs(txt, txtLen, SkTextEncoding::kUTF8, fGlyphs.begin(), fGlyphs.size());
        }
 
        SkFont font = ToolUtils::DefaultPortableFont();
        font.setSubpixel(true);
        font.setEdging(SkFont::Edging::kAntiAlias);
        font.setSize(30);
 
        SkTextBlobBuilder builder;
        int glyphCount = fGlyphs.size();
        const SkTextBlobBuilder::RunBuffer* run;
 
        run = &builder.allocRun(font, glyphCount, 10, 10, nullptr);
        memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
 
        run = &builder.allocRunPosH(font, glyphCount,  80, nullptr);
        memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
        for (int i = 0; i < glyphCount; ++i) {
            run->pos[i] = font.getSize() * i * .75f;
        }
 
        run = &builder.allocRunPos(font, glyphCount, nullptr);
        memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
        for (int i = 0; i < glyphCount; ++i) {
            run->pos[i * 2] = font.getSize() * i * .75f;
            run->pos[i * 2 + 1] = 150 + 5 * sinf((float)i * 8 / glyphCount);
        }
 
        fBlob = builder.make();
 
        SkColor  colors[2];
        colors[0] = SK_ColorRED;
        colors[1] = SK_ColorGREEN;
 
        SkScalar pos[std::size(colors)];
        for (unsigned i = 0; i < std::size(pos); ++i) {
            pos[i] = (float)i / (std::size(pos) - 1);
        }
 
        SkISize sz = this->getISize();
        fShader = SkGradientShader::MakeRadial(SkPoint::Make(SkIntToScalar(sz.width() / 2),
                                               SkIntToScalar(sz.height() / 2)),
                                               sz.width() * .66f, colors, pos,
                                               std::size(colors),
                                               SkTileMode::kRepeat);
    }

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

• third_party/skia/gm/textblobshader.cpp