skgpu::graphite::MiddleOutFanRenderStep Class Reference

#include <MiddleOutFanRenderStep.h>

Inheritance diagram for skgpu::graphite::MiddleOutFanRenderStep:

Public Member Functions
	MiddleOutFanRenderStep (bool evenOdd)
	~MiddleOutFanRenderStep () 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 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 MiddleOutFanRenderStep.h.

Constructor & Destructor Documentation

MiddleOutFanRenderStep()

skgpu::graphite::MiddleOutFanRenderStep::MiddleOutFanRenderStep

(

bool

evenOdd

)

Definition at line 20 of file MiddleOutFanRenderStep.cpp.

        : RenderStep("MiddleOutFanRenderStep",
                     evenOdd ? "even-odd" : "winding",
                     Flags::kRequiresMSAA,
                     /*uniforms=*/{{"localToDevice", SkSLType::kFloat4x4}},
                     PrimitiveType::kTriangles,
                     evenOdd ? kEvenOddStencilPass : kWindingStencilPass,
                     /*vertexAttrs=*/
                            {{"position", VertexAttribType::kFloat2, SkSLType::kFloat2},
                             {"depth", VertexAttribType::kFloat, SkSLType::kFloat},
                             {"ssboIndices", VertexAttribType::kUShort2, SkSLType::kUShort2}},
                     /*instanceAttrs=*/{}) {}

~MiddleOutFanRenderStep()

skgpu::graphite::MiddleOutFanRenderStep::~MiddleOutFanRenderStep ( )

override

Definition at line 33 of file MiddleOutFanRenderStep.cpp.

{}

Member Function Documentation

vertexSkSL()

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

overridevirtual

Implements skgpu::graphite::RenderStep.

Definition at line 35 of file MiddleOutFanRenderStep.cpp.

                                                   {
    return R"(
        float4 devPosition = localToDevice * float4(position, 0.0, 1.0);
        devPosition.z = depth;
        stepLocalCoords = position;
    )";
}

writeUniformsAndTextures()

void skgpu::graphite::MiddleOutFanRenderStep::writeUniformsAndTextures ( const DrawParams &  params, PipelineDataGatherer *  gatherer  ) const

overridevirtual

Implements skgpu::graphite::RenderStep.

Definition at line 65 of file MiddleOutFanRenderStep.cpp.

                                                                                            {
    SkDEBUGCODE(UniformExpectationsValidator uev(gatherer, this->uniforms());)
 
    gatherer->write(params.transform().matrix());
}

writeVertices()

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

overridevirtual

Implements skgpu::graphite::RenderStep.

Definition at line 43 of file MiddleOutFanRenderStep.cpp.

                                                                          {
    // TODO: Have Shape provide a path-like iterator so we don't actually have to convert non
    // paths to SkPath just to iterate their pts/verbs
    SkPath path = params.geometry().shape().asPath();
 
    const int maxTrianglesInFans = std::max(path.countVerbs() - 2, 0);
 
    float depth = params.order().depthAsFloat();
 
    DrawWriter::Vertices verts{*writer};
    verts.reserve(maxTrianglesInFans * 3);
    for (tess::PathMiddleOutFanIter it(path); !it.done();) {
        for (auto [p0, p1, p2] : it.nextStack()) {
            verts.append(3) << p0 << depth << ssboIndices
                            << p1 << depth << ssboIndices
                            << p2 << depth << ssboIndices;
        }
    }
}

---

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

• third_party/skia/src/gpu/graphite/render/MiddleOutFanRenderStep.h
• third_party/skia/src/gpu/graphite/render/MiddleOutFanRenderStep.cpp