105 lines
1.9 KiB
C++
105 lines
1.9 KiB
C++
#include "FTSize.h"
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FTSize::FTSize()
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: ftFace(0),
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ftSize(0),
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size(0),
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xResolution(0),
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yResolution(0),
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err(0)
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{}
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FTSize::~FTSize()
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{}
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bool FTSize::CharSize( FT_Face* face, unsigned int pointSize, unsigned int xRes, unsigned int yRes )
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{
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if( size != pointSize || xResolution != xRes || yResolution != yRes)
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{
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err = FT_Set_Char_Size( *face, 0L, pointSize * 64, xResolution, yResolution);
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if( !err)
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{
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ftFace = face;
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size = pointSize;
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xResolution = xRes;
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yResolution = yRes;
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ftSize = (*ftFace)->size;
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}
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else
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{
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ftFace = 0;
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size = 0;
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xResolution = 0;
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yResolution = 0;
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ftSize = 0;
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}
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}
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return !err;
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}
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unsigned int FTSize::CharSize() const
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{
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return size;
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}
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float FTSize::Ascender() const
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{
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return ftSize == 0 ? 0.0f : static_cast<float>( ftSize->metrics.ascender) / 64.0f;
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}
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float FTSize::Descender() const
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{
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return ftSize == 0 ? 0.0f : static_cast<float>( ftSize->metrics.descender) / 64.0f;
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}
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float FTSize::Height() const
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{
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if( 0 == ftSize)
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{
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return 0.0f;
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}
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if( FT_IS_SCALABLE((*ftFace)))
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{
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return ( (*ftFace)->bbox.yMax - (*ftFace)->bbox.yMin) * ( (float)ftSize->metrics.y_ppem / (float)(*ftFace)->units_per_EM);
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}
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else
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{
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return static_cast<float>( ftSize->metrics.height) / 64.0f;
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}
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}
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float FTSize::Width() const
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{
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if( 0 == ftSize)
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{
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return 0.0f;
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}
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if( FT_IS_SCALABLE((*ftFace)))
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{
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return ( (*ftFace)->bbox.xMax - (*ftFace)->bbox.xMin) * ( static_cast<float>(ftSize->metrics.x_ppem) / static_cast<float>((*ftFace)->units_per_EM));
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}
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else
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{
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return static_cast<float>( ftSize->metrics.max_advance) / 64.0f;
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}
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}
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float FTSize::Underline() const
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{
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return 0.0f;
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}
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