GrXferProcessor::ProgramImpl Class Reference

#include <GrXferProcessor.h>

Classes
struct	EmitArgs

Public Types
using	SamplerHandle = GrGLSLUniformHandler::SamplerHandle

Public Member Functions
virtual	~ProgramImpl ()=default
void	emitCode (const EmitArgs &)
void	setData (const GrGLSLProgramDataManager &pdm, const GrXferProcessor &xp)

Protected Member Functions
	ProgramImpl ()=default

Static Protected Member Functions
static void	DefaultCoverageModulation (GrGLSLXPFragmentBuilder *fragBuilder, const char *srcCoverage, const char *dstColor, const char *outColor, const char *outColorSecondary, const GrXferProcessor &proc)

Private Member Functions
virtual void	emitOutputsForBlendState (const EmitArgs &)
virtual void	emitBlendCodeForDstRead (GrGLSLXPFragmentBuilder *, GrGLSLUniformHandler *, const char *srcColor, const char *srcCoverage, const char *dstColor, const char *outColor, const char *outColorSecondary, const GrXferProcessor &)
virtual void	emitWriteSwizzle (GrGLSLXPFragmentBuilder *, const skgpu::Swizzle &, const char *outColor, const char *outColorSecondary) const
virtual void	onSetData (const GrGLSLProgramDataManager &, const GrXferProcessor &)

Detailed Description

Definition at line 282 of file GrXferProcessor.h.

Member Typedef Documentation

SamplerHandle

using GrXferProcessor::ProgramImpl::SamplerHandle = GrGLSLUniformHandler::SamplerHandle

Definition at line 286 of file GrXferProcessor.h.

Constructor & Destructor Documentation

~ProgramImpl()

virtual GrXferProcessor::ProgramImpl::~ProgramImpl ( )

virtualdefault

ProgramImpl()

GrXferProcessor::ProgramImpl::ProgramImpl ( )

protecteddefault

Member Function Documentation

DefaultCoverageModulation()

void ProgramImpl::DefaultCoverageModulation ( GrGLSLXPFragmentBuilder *  fragBuilder, const char *  srcCoverage, const char *  dstColor, const char *  outColor, const char *  outColorSecondary, const GrXferProcessor &  proc  )

staticprotected

Definition at line 209 of file GrXferProcessor.cpp.

                                                                         {
    if (srcCoverage) {
        if (proc.isLCD()) {
            fragBuilder->codeAppendf("half3 lerpRGB = mix(%s.aaa, %s.aaa, %s.rgb);",
                                     dstColor,
                                     outColor,
                                     srcCoverage);
        }
        fragBuilder->codeAppendf("%s = %s * %s + (half4(1.0) - %s) * %s;",
                                 outColor,
                                 srcCoverage,
                                 outColor,
                                 srcCoverage,
                                 dstColor);
        if (proc.isLCD()) {
            fragBuilder->codeAppendf("%s.a = max(max(lerpRGB.r, lerpRGB.b), lerpRGB.g);", outColor);
        }
    }
}

emitBlendCodeForDstRead()

virtual void GrXferProcessor::ProgramImpl::emitBlendCodeForDstRead ( GrGLSLXPFragmentBuilder *  , GrGLSLUniformHandler *  , const char *  srcColor, const char *  srcCoverage, const char *  dstColor, const char *  outColor, const char *  outColorSecondary, const GrXferProcessor &    )

inlineprivatevirtual

Called by emitCode() when the XP will perform a dst read. This method only needs to supply the blending logic. The base class applies coverage. A subclass only needs to implement this method if it can construct a GrXferProcessor that reads the dst color.

Definition at line 363 of file GrXferProcessor.h.

                                                                 {
        SK_ABORT("emitBlendCodeForDstRead not implemented.");
    }

emitCode()

void GrXferProcessor::ProgramImpl::emitCode

(

const EmitArgs &

)

This is similar to emitCode() in the base class, except it takes a full shader builder. This allows the effect subclass to emit vertex code.

emitOutputsForBlendState()

virtual void GrXferProcessor::ProgramImpl::emitOutputsForBlendState ( const EmitArgs &  )

inlineprivatevirtual

Called by emitCode() when the XP will not be performing a dst read. This method is responsible for both blending and coverage. A subclass only needs to implement this method if it can construct a GrXferProcessor that will not read the dst color.

Definition at line 354 of file GrXferProcessor.h.

                                                           {
        SK_ABORT("emitOutputsForBlendState not implemented.");
    }

emitWriteSwizzle()

void ProgramImpl::emitWriteSwizzle ( GrGLSLXPFragmentBuilder *  x, const skgpu::Swizzle &  swizzle, const char *  outColor, const char *  outColorSecondary  ) const

privatevirtual

Definition at line 190 of file GrXferProcessor.cpp.

                                                                        {
    if (skgpu::Swizzle::RGBA() != swizzle) {
        x->codeAppendf("%s = %s.%s;", outColor, outColor, swizzle.asString().c_str());
        if (outColorSecondary) {
            x->codeAppendf("%s = %s.%s;",
                           outColorSecondary,
                           outColorSecondary,
                           swizzle.asString().c_str());
        }
    }
}

onSetData()

virtual void GrXferProcessor::ProgramImpl::onSetData ( const GrGLSLProgramDataManager &  , const GrXferProcessor &    )

inlineprivatevirtual

Definition at line 379 of file GrXferProcessor.h.

{}

setData()

void ProgramImpl::setData	(	const GrGLSLProgramDataManager &	pdm,
		const GrXferProcessor &	xp
	)

A ProgramImpl instance can be reused with any GrXferProcessor that produces the same key. This function reads data from a GrXferProcessor and uploads any uniform variables required by the shaders created in emitCode(). The GrXferProcessor parameter is guaranteed to be of the same type that created this ProgramImpl and to have an identical processor key as the one that created this ProgramImpl. This function calls onSetData on the subclass of ProgramImpl.

Definition at line 205 of file GrXferProcessor.cpp.

                                                                                        {
    this->onSetData(pdm, xp);
}

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

• third_party/skia/src/gpu/ganesh/GrXferProcessor.h
• third_party/skia/src/gpu/ganesh/GrXferProcessor.cpp