skiagm::MeshUniformsGM Class Reference

Inheritance diagram for skiagm::MeshUniformsGM:

Public Member Functions
	MeshUniformsGM ()
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 Types
using	Attribute = SkMeshSpecification::Attribute
using	Varying = SkMeshSpecification::Varying

Protected Member Functions
SkISize	getISize () override
void	onOnceBeforeDraw () override
SkString	getName () const override
DrawResult	onDraw (SkCanvas *canvas, SkString *error) override
bool	onAnimate (double nanos) override
Protected Member Functions inherited from skiagm::GM
virtual DrawResult	onGpuSetup (SkCanvas *, SkString *, GraphiteTestContext *)
virtual void	onGpuTeardown ()
virtual void	onDraw (SkCanvas *)
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 513 of file mesh.cpp.

Member Typedef Documentation

Attribute

using skiagm::MeshUniformsGM::Attribute = SkMeshSpecification::Attribute

protected

Definition at line 518 of file mesh.cpp.

Varying

using skiagm::MeshUniformsGM::Varying = SkMeshSpecification::Varying

protected

Definition at line 519 of file mesh.cpp.

Constructor & Destructor Documentation

MeshUniformsGM()

skiagm::MeshUniformsGM::MeshUniformsGM ( )

inline

Definition at line 515 of file mesh.cpp.

{ this->onAnimate(0); }

Member Function Documentation

getISize()

SkISize skiagm::MeshUniformsGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 521 of file mesh.cpp.

{ return {140, 250}; }

getName()

SkString skiagm::MeshUniformsGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 575 of file mesh.cpp.

{ return SkString("custommesh_uniforms"); }

onAnimate()

bool skiagm::MeshUniformsGM::onAnimate ( double  nanos )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 633 of file mesh.cpp.

                                          {
        fDegrees = TimeUtils::NanosToSeconds(nanos) * 360.f/10.f + 45.f;
        // prime number periods, like locusts.
        fColor.fR = TimeUtils::SineWave(nanos, 13.f, 0.f, 0.f, 1.f);
        fColor.fG = TimeUtils::SineWave(nanos, 23.f, 5.f, 0.f, 1.f);
        fColor.fB = TimeUtils::SineWave(nanos, 11.f, 0.f, 0.f, 1.f);
        fColor.fA = 1.f;
        return true;
    }

onDraw()

DrawResult skiagm::MeshUniformsGM::onDraw ( SkCanvas *  canvas, SkString *  error  )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 577 of file mesh.cpp.

                                                                  {
        SkMatrix matrices[] {
                SkMatrix::MakeAll(-1,  0, 0, // self inverse so no effect.
                                   0, -1, 0,
                                   0,  0, 1),
                SkMatrix::RotateDeg(fDegrees/2.f, {0.5f, 0.5f}),
        };
        for (const auto& m : matrices) {
            auto unis = SkData::MakeUninitialized(fSpec->uniformSize());
 
            SkPoint trans = -kCoordTrans;
            static_assert(sizeof(SkPoint) == 2*sizeof(float));
 
            const SkMeshSpecification::Uniform* u = fSpec->findUniform("t");
            SkASSERT(u);
            std::memcpy(SkTAddOffset<void>(unis->writable_data(), u->offset),
                        (void*)&trans,
                        2*sizeof(float));
 
            u = fSpec->findUniform("m");
            SkASSERT(u);
            for (size_t offset = u->offset, col = 0; col < 3; ++col) {
                for (size_t row = 0; row < 3; ++row, offset += sizeof(float)) {
                    *SkTAddOffset<float>(unis->writable_data(), offset) = m.rc(row, col);
                }
            }
 
            u = fSpec->findUniform("color");
            SkASSERT(u);
            std::memcpy(SkTAddOffset<void>(unis->writable_data(), u->offset),
                        fColor.vec(),
                        4*sizeof(float));
 
            auto result = SkMesh::Make(fSpec,
                                       SkMesh::Mode::kTriangleStrip,
                                       fVB,
                                       /*vertexCount=*/4,
                                       /*vertexOffset=*/0,
                                       /*uniforms=*/std::move(unis),
                                       /*children=*/{},
                                       kRect);
 
            if (!result.mesh.isValid()) {
                SkDebugf("Mesh creation failed: %s\n", result.error.c_str());
                return DrawResult::kFail;
            }
 
            SkPaint paint;
            paint.setShader(fShader);
            canvas->drawMesh(result.mesh, SkBlender::Mode(SkBlendMode::kModulate), paint);
 
            canvas->translate(0, kRect.height() + 10);
        }
        return DrawResult::kOk;
    }

onOnceBeforeDraw()

void skiagm::MeshUniformsGM::onOnceBeforeDraw ( )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 523 of file mesh.cpp.

                                     {
        static const Attribute kAttributes[]{
                {Attribute::Type::kFloat2, 0, SkString{"pos"}  },
                {Attribute::Type::kFloat2, 8, SkString{"coords"}},
        };
        static const Varying kVaryings[]{
                {Varying::Type::kFloat2, SkString{"coords"}},
        };
        // To exercise shared VS/FS uniforms we have a matrix that is applied twice, once in each
        // stage.
        static constexpr char kVS[] = R"(
                uniform float t[2];
                uniform half3x3 m;
                Varyings main(in const Attributes attributes) {
                    Varyings varyings;
                    varyings.coords   = (m*float3(attributes.coords + float2(t[0], t[1]), 1)).xy;
                    varyings.position = attributes.pos;
                    return varyings;
                }
        )";
        static constexpr char kFS[] = R"(
                uniform half3x3 m;
                layout(color) uniform half4 color;
                float2 main(const Varyings varyings, out half4 c) {
                    c = color;
                    return (m*float3(varyings.coords, 1)).xy;
                }
        )";
        auto [spec, error] =
                SkMeshSpecification::Make(kAttributes,
                                          sizeof(Vertex),
                                          kVaryings,
                                          SkString(kVS),
                                          SkString(kFS),
                                          SkColorSpace::MakeSRGB(),
                                          kPremul_SkAlphaType);
        if (!spec) {
            SkDebugf("%s\n", error.c_str());
        }
        fSpec = std::move(spec);
 
        SkColor colors[] = {SK_ColorWHITE, SK_ColorBLACK};
        fShader = SkGradientShader::MakeRadial(kGradCenter,
                                               .4f,
                                               colors,
                                               nullptr,
                                               2,
                                               SkTileMode::kMirror);
 
        fVB = SkMeshes::MakeVertexBuffer(kQuad, sizeof(kQuad));
    }

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

• third_party/skia/gm/mesh.cpp