skiagm::TextBlobTransforms Class Reference

Inheritance diagram for skiagm::TextBlobTransforms:

Public Member Functions
	TextBlobTransforms ()
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 *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

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 27 of file textblobtransforms.cpp.

Constructor & Destructor Documentation

TextBlobTransforms()

skiagm::TextBlobTransforms::TextBlobTransforms ( )

inline

Definition at line 30 of file textblobtransforms.cpp.

{}

Member Function Documentation

getISize()

SkISize skiagm::TextBlobTransforms::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 65 of file textblobtransforms.cpp.

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

getName()

SkString skiagm::TextBlobTransforms::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 63 of file textblobtransforms.cpp.

{ return SkString("textblobtransforms"); }

onDraw()

void skiagm::TextBlobTransforms::onDraw ( SkCanvas *  canvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 67 of file textblobtransforms.cpp.

                                           {
 
        canvas->drawColor(SK_ColorGRAY);
 
        SkPaint paint;
 
        SkRect bounds = fBlob->bounds();
        canvas->translate(20, 20);
 
        // Colors were chosen to map to pairs of canonical colors.  The GPU Backend will cache A8
        // Texture Blobs based on the canonical color they map to.  Canonical colors are used to
        // create masks.  For A8 there are 8 of them.
        //SkColor colors[] = {SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorYELLOW, SK_ColorWHITE};
 
        SkScalar xOffset = SkScalarCeilToScalar(bounds.width());
        SkScalar yOffset = SkScalarCeilToScalar(bounds.height());
        // first translate
        canvas->translate(xOffset, 2 * yOffset);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->translate(-xOffset, 0);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->translate(2 * xOffset, 0);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->translate(-xOffset, -yOffset);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->translate(0, 2 * yOffset);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        // now rotate
        canvas->translate(4 * xOffset, -yOffset);
        canvas->rotate(180.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->rotate(-180.f);
        canvas->translate(0, -yOffset);
        canvas->rotate(-180.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->rotate(270.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->rotate(-90.f);
        canvas->translate(-xOffset, yOffset);
        canvas->rotate(-90.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->rotate(90.f);
 
        // and scales
        canvas->translate(- 3 * xOffset, 3 * yOffset);
        canvas->scale(1.5f, 1.5f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->translate(xOffset, 0);
        canvas->scale(.25f, .25f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
        canvas->translate(xOffset, 0);
        canvas->scale(3.f, 2.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        // finally rotates, scales, and translates together
        canvas->translate(xOffset, 0);
        canvas->rotate(23.f);
        canvas->scale(.33f, .5f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(-46.f);
        canvas->translate(xOffset, 0);
        canvas->scale(1.2f, 1.1f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(46.f);
        canvas->translate(xOffset, 0);
        canvas->scale(1.1f, 1.2f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(46.f);
        canvas->translate(xOffset, 0);
        canvas->scale(.95f, 1.1f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(46.f);
        canvas->translate(xOffset, 0);
        canvas->scale(1.3f, .7f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(46.f);
        canvas->translate(xOffset, 0);
        canvas->scale(.8f, 1.1f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(10.f);
        canvas->translate(xOffset, 0);
        canvas->scale(1.f, 5.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
 
        canvas->rotate(5.f);
        canvas->translate(xOffset, 0);
        canvas->scale(5.f, 1.f);
        canvas->drawTextBlob(fBlob, 0, 0, paint);
    }

onOnceBeforeDraw()

void skiagm::TextBlobTransforms::onOnceBeforeDraw ( )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 33 of file textblobtransforms.cpp.

                                     {
        SkTextBlobBuilder builder;
 
        // make textblob.  To stress distance fields, we choose sizes appropriately
        SkFont font(ToolUtils::DefaultPortableTypeface(), 162);
        font.setEdging(SkFont::Edging::kAlias);
        const char* text = "A";
 
        SkRect bounds;
        font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
        ToolUtils::add_to_text_blob(&builder, text, font, 0, 0);
 
        // Medium
        SkScalar xOffset = bounds.width() + 5;
        font.setSize(72);
        text = "B";
        ToolUtils::add_to_text_blob(&builder, text, font, xOffset, 0);
 
        font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
        SkScalar yOffset = bounds.height();
 
        // Small
        font.setSize(32);
        text = "C";
        ToolUtils::add_to_text_blob(&builder, text, font, xOffset, -yOffset - 10);
 
        // build
        fBlob = builder.make();
    }

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

• third_party/skia/gm/textblobtransforms.cpp