AnalyticGradientShaderGM Class Reference

Inheritance diagram for AnalyticGradientShaderGM:

Public Member Functions
	AnalyticGradientShaderGM ()
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
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 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 133 of file analytic_gradients.cpp.

Constructor & Destructor Documentation

AnalyticGradientShaderGM()

AnalyticGradientShaderGM::AnalyticGradientShaderGM ( )

inline

Definition at line 135 of file analytic_gradients.cpp.

                               {
 
    }

Member Function Documentation

getISize()

SkISize AnalyticGradientShaderGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 142 of file analytic_gradients.cpp.

{ return SkISize::Make(1024, 512); }

getName()

SkString AnalyticGradientShaderGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 140 of file analytic_gradients.cpp.

{ return SkString("analytic_gradients"); }

onDraw()

void AnalyticGradientShaderGM::onDraw ( SkCanvas *  canvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 144 of file analytic_gradients.cpp.

                                           {
        const SkPoint points[2] = { SkPoint::Make(0, 0), SkPoint::Make(RECT_WIDTH, 0.0) };
 
        for (int cellRow = 0; cellRow < NUM_ROWS; cellRow++) {
            // Each interval has 4 different color counts, one per mode
            const int* colorCounts = INTERVAL_COLOR_COUNTS[cellRow]; // Has len = 4
 
            for (int cellCol = 0; cellCol < NUM_COLS; cellCol++) {
                // create_gradient_points(cellRow, cellCol, points);
 
                // Get the color count dependent on interval and mode
                int colorCount = colorCounts[cellCol];
                // Get the positions given the mode
                const int* layout = M_POSITIONS[cellCol];
 
                // Collect positions and colors specific to the interval+mode normalizing the
                // position based on the interval count (== cellRow+1)
                AutoSTMalloc<4, SkColor> colors(colorCount);
                AutoSTMalloc<4, SkScalar> positions(colorCount);
                int j = 0;
                for (int i = 0; i < colorCount; i++) {
                    positions[i] = SkIntToScalar(layout[i]) / (cellRow + 1);
                    colors[i] = COLORS[j % COLOR_COUNT];
                    j++;
                }
 
                auto shader = SkGradientShader::MakeLinear(
                                points,
                                colors.get(),
                                positions.get(),
                                colorCount,
                                SkTileMode::kClamp,
                                0,
                                nullptr);
 
                shade_rect(canvas, shader, cellRow, cellCol);
            }
        }
    }

---

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

• third_party/skia/gm/analytic_gradients.cpp