SkTextBlobBuilderRunHandler Class Reference

#include <SkShaper.h>

Inheritance diagram for SkTextBlobBuilderRunHandler:

Public Member Functions
	SkTextBlobBuilderRunHandler (const char *utf8Text, SkPoint offset)
sk_sp< SkTextBlob >	makeBlob ()
SkPoint	endPoint ()
void	beginLine () override
void	runInfo (const RunInfo &) override
void	commitRunInfo () override
Buffer	runBuffer (const RunInfo &) override
void	commitRunBuffer (const RunInfo &) override
void	commitLine () override
Public Member Functions inherited from SkShaper::RunHandler
virtual	~RunHandler ()=default
virtual void	beginLine ()=0
virtual void	runInfo (const RunInfo &)=0
virtual void	commitRunInfo ()=0
virtual Buffer	runBuffer (const RunInfo &)=0
virtual void	commitRunBuffer (const RunInfo &)=0
virtual void	commitLine ()=0

Detailed Description

Helper for shaping text directly into a SkTextBlob.

Definition at line 278 of file SkShaper.h.

Constructor & Destructor Documentation

SkTextBlobBuilderRunHandler()

SkTextBlobBuilderRunHandler::SkTextBlobBuilderRunHandler ( const char *  utf8Text, SkPoint  offset  )

inline

Definition at line 280 of file SkShaper.h.

        : fUtf8Text(utf8Text)
        , fOffset(offset) {}

Member Function Documentation

beginLine()

void SkTextBlobBuilderRunHandler::beginLine ( )

overridevirtual

Called when beginning a line.

Implements SkShaper::RunHandler.

Definition at line 208 of file SkShaper.cpp.

                                            {
    fCurrentPosition = fOffset;
    fMaxRunAscent = 0;
    fMaxRunDescent = 0;
    fMaxRunLeading = 0;
}

commitLine()

void SkTextBlobBuilderRunHandler::commitLine ( )

overridevirtual

Called when ending a line.

Implements SkShaper::RunHandler.

Definition at line 253 of file SkShaper.cpp.

                                             {
    fOffset += { 0, fMaxRunDescent + fMaxRunLeading - fMaxRunAscent };
}

commitRunBuffer()

void SkTextBlobBuilderRunHandler::commitRunBuffer ( const RunInfo &  info )

overridevirtual

Called after each runBuffer is filled out.

Implements SkShaper::RunHandler.

Definition at line 245 of file SkShaper.cpp.

                                                                     {
    SkASSERT(0 <= fClusterOffset);
    for (int i = 0; i < fGlyphCount; ++i) {
        SkASSERT(fClusters[i] >= (unsigned)fClusterOffset);
        fClusters[i] -= fClusterOffset;
    }
    fCurrentPosition += info.fAdvance;
}

commitRunInfo()

void SkTextBlobBuilderRunHandler::commitRunInfo ( )

overridevirtual

Called after all runInfo calls for a line.

Implements SkShaper::RunHandler.

Definition at line 222 of file SkShaper.cpp.

                                                {
    fCurrentPosition.fY -= fMaxRunAscent;
}

endPoint()

SkPoint SkTextBlobBuilderRunHandler::endPoint ( )

inline

Definition at line 284 of file SkShaper.h.

{ return fOffset; }

makeBlob()

sk_sp< SkTextBlob > SkTextBlobBuilderRunHandler::makeBlob

(

)

Definition at line 257 of file SkShaper.cpp.

                                                        {
    return fBuilder.make();
}

runBuffer()

SkShaper::RunHandler::Buffer SkTextBlobBuilderRunHandler::runBuffer ( const RunInfo &  info )

overridevirtual

Called for each run in a line after commitRunInfo. The buffer will be filled out.

Implements SkShaper::RunHandler.

Definition at line 226 of file SkShaper.cpp.

                                                                                   {
    int glyphCount = SkTFitsIn<int>(info.glyphCount) ? info.glyphCount : INT_MAX;
    int utf8RangeSize = SkTFitsIn<int>(info.utf8Range.size()) ? info.utf8Range.size() : INT_MAX;
 
    const auto& runBuffer = fBuilder.allocRunTextPos(info.fFont, glyphCount, utf8RangeSize);
    if (runBuffer.utf8text && fUtf8Text) {
        memcpy(runBuffer.utf8text, fUtf8Text + info.utf8Range.begin(), utf8RangeSize);
    }
    fClusters = runBuffer.clusters;
    fGlyphCount = glyphCount;
    fClusterOffset = info.utf8Range.begin();
 
    return { runBuffer.glyphs,
             runBuffer.points(),
             nullptr,
             runBuffer.clusters,
             fCurrentPosition };
}

runInfo()

void SkTextBlobBuilderRunHandler::runInfo ( const RunInfo &  info )

overridevirtual

Called once for each run in a line. Can compute baselines and offsets.

Implements SkShaper::RunHandler.

Definition at line 214 of file SkShaper.cpp.

                                                             {
    SkFontMetrics metrics;
    info.fFont.getMetrics(&metrics);
    fMaxRunAscent = std::min(fMaxRunAscent, metrics.fAscent);
    fMaxRunDescent = std::max(fMaxRunDescent, metrics.fDescent);
    fMaxRunLeading = std::max(fMaxRunLeading, metrics.fLeading);
}

---

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

• third_party/skia/modules/skshaper/include/SkShaper.h
• third_party/skia/modules/skshaper/src/SkShaper.cpp