#include <CoverBoundsRenderStep.h>

Inheritance diagram for skgpu::graphite::CoverBoundsRenderStep:

Public Member Functions
	CoverBoundsRenderStep (bool inverseFill)

	~CoverBoundsRenderStep () override

std::string	vertexSkSL () const override

void	writeVertices (DrawWriter *, const DrawParams &, skvx::ushort2 ssboIndices) const override

void	writeUniformsAndTextures (const DrawParams &, PipelineDataGatherer *) const override

Public Member Functions inherited from skgpu::graphite::RenderStep
virtual	~RenderStep ()=default

virtual void	writeVertices (DrawWriter *, const DrawParams &, skvx::ushort2 ssboIndices) const =0

virtual void	writeUniformsAndTextures (const DrawParams &, PipelineDataGatherer *) const =0

virtual std::string	vertexSkSL () const =0

virtual std::string	texturesAndSamplersSkSL (const ResourceBindingRequirements &, int *nextBindingIndex) const

virtual const char *	fragmentCoverageSkSL () const

virtual const char *	fragmentColorSkSL () const

uint32_t	uniqueID () const

const char *	name () const

bool	requiresMSAA () const

bool	performsShading () const

bool	hasTextures () const

bool	emitsPrimitiveColor () const

bool	outsetBoundsForAA () const

Coverage	coverage () const

PrimitiveType	primitiveType () const

size_t	vertexStride () const

size_t	instanceStride () const

size_t	numUniforms () const

size_t	numVertexAttributes () const

size_t	numInstanceAttributes () const

SkSpan< const Uniform >	uniforms () const

SkSpan< const Attribute >	vertexAttributes () const

SkSpan< const Attribute >	instanceAttributes () const

SkSpan< const Varying >	varyings () const

const DepthStencilSettings &	depthStencilSettings () const

SkEnumBitMask< DepthStencilFlags >	depthStencilFlags () const

Additional Inherited Members
Static Public Member Functions inherited from skgpu::graphite::RenderStep
static const char *	ssboIndicesAttribute ()

static const char *	ssboIndicesVarying ()

Protected Types inherited from skgpu::graphite::RenderStep
enum class	Flags : unsigned { kNone = 0b0000000 , kRequiresMSAA = 0b0000001 , kPerformsShading = 0b0000010 , kHasTextures = 0b0000100 , kEmitsCoverage = 0b0001000 , kLCDCoverage = 0b0010000 , kEmitsPrimitiveColor = 0b0100000 , kOutsetBoundsForAA = 0b1000000 }

Protected Member Functions inherited from skgpu::graphite::RenderStep
	RenderStep (std::string_view className, std::string_view variantName, SkEnumBitMask< Flags > flags, std::initializer_list< Uniform > uniforms, PrimitiveType primitiveType, DepthStencilSettings depthStencilSettings, SkSpan< const Attribute > vertexAttrs, SkSpan< const Attribute > instanceAttrs, SkSpan< const Varying > varyings={})

Detailed Description

Definition at line 15 of file CoverBoundsRenderStep.h.

Constructor & Destructor Documentation

◆ CoverBoundsRenderStep()

skgpu::graphite::CoverBoundsRenderStep::CoverBoundsRenderStep ( bool inverseFill )

Definition at line 17 of file CoverBoundsRenderStep.cpp.

        : RenderStep("CoverBoundsRenderStep",
                     inverseFill ? "inverse" : "regular",
                     Flags::kPerformsShading,
                     /*uniforms=*/{},
                     PrimitiveType::kTriangleStrip,
                     inverseFill ? kInverseCoverPass : kRegularCoverPass,
                     /*vertexAttrs=*/{{"position",
                                       VertexAttribType::kFloat4,
                                       SkSLType::kFloat4}},
                     /*instanceAttrs=*/{{"bounds", VertexAttribType::kFloat4, SkSLType::kFloat4},
                                        {"depth", VertexAttribType::kFloat, SkSLType::kFloat},
                                        {"ssboIndices", VertexAttribType::kUShort2, SkSLType::kUShort2},
                                        {"mat0", VertexAttribType::kFloat3, SkSLType::kFloat3},
                                        {"mat1", VertexAttribType::kFloat3, SkSLType::kFloat3},
                                        {"mat2", VertexAttribType::kFloat3, SkSLType::kFloat3}})
        , fInverseFill(inverseFill) {}

◆ ~CoverBoundsRenderStep()

skgpu::graphite::CoverBoundsRenderStep::~CoverBoundsRenderStep ( )

override

Definition at line 35 of file CoverBoundsRenderStep.cpp.

35{}

Member Function Documentation

◆ vertexSkSL()

std::string skgpu::graphite::CoverBoundsRenderStep::vertexSkSL ( ) const

overridevirtual

Implements skgpu::graphite::RenderStep.

Definition at line 37 of file CoverBoundsRenderStep.cpp.

                                                  {
    // Returns the body of a vertex function, which must define a float4 devPosition variable and
    // must write to an already-defined float2 stepLocalCoords variable.
    return "float4 devPosition = cover_bounds_vertex_fn("
                                         "float2(sk_VertexID / 2, sk_VertexID % 2), "
                                         "bounds, depth, float3x3(mat0, mat1, mat2), "
                                         "stepLocalCoords);\n";
}

◆ writeUniformsAndTextures()

void skgpu::graphite::CoverBoundsRenderStep::writeUniformsAndTextures	(	const DrawParams &	,
		PipelineDataGatherer *
	)		const

overridevirtual

Implements skgpu::graphite::RenderStep.

Definition at line 74 of file CoverBoundsRenderStep.cpp.

                                                                                  {
    // All data is uploaded as instance attributes, so no uniforms are needed.
}

◆ writeVertices()

void skgpu::graphite::CoverBoundsRenderStep::writeVertices	(	DrawWriter *	writer,
		const DrawParams &	params,
		skvx::ushort2	ssboIndices
	)		const

overridevirtual

Implements skgpu::graphite::RenderStep.

Definition at line 46 of file CoverBoundsRenderStep.cpp.

                                                                         {
    // Each instance is 4 vertices, forming 2 triangles from a single triangle strip, so no indices
    // are needed. sk_VertexID is used to place vertex positions, so no vertex buffer is needed.
    DrawWriter::Instances instances{*writer, {}, {}, 4};
 
    skvx::float4 bounds;
    const SkM44* m;
    if (fInverseFill) {
        // Normally all bounding boxes are sorted such that l<r and t<b. We upload an inverted
        // rectangle [r,b,l,t] when it's an inverse fill to encode that the bounds are already in
        // device space and then use the inverse of the transform to compute local coordinates.
        bounds = skvx::shuffle</*R*/2, /*B*/3, /*L*/0, /*T*/1>(
                skvx::cast<float>(skvx::int4::Load(&params.clip().scissor())));
        m = &params.transform().inverse();
    } else {
        bounds = params.geometry().bounds().ltrb();
        m = &params.transform().matrix();
    }
 
    // Since the local coords always have Z=0, we can discard the 3rd row and column of the matrix.
    instances.append(1) << bounds << params.order().depthAsFloat() << ssboIndices
                        << m->rc(0,0) << m->rc(1,0) << m->rc(3,0)
                        << m->rc(0,1) << m->rc(1,1) << m->rc(3,1)
                        << m->rc(0,3) << m->rc(1,3) << m->rc(3,3);
}

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

third_party/skia/src/gpu/graphite/render/CoverBoundsRenderStep.h
third_party/skia/src/gpu/graphite/render/CoverBoundsRenderStep.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ CoverBoundsRenderStep()

◆ ~CoverBoundsRenderStep()

Member Function Documentation

◆ vertexSkSL()

◆ writeUniformsAndTextures()

◆ writeVertices()