YiSDFTextAtlas.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_SDF_TEXT_ATLAS_H_
#define _YI_SDF_TEXT_ATLAS_H_

#include "graphics/YiAbstractTextAtlas.h"


class CYISDFTextAtlas : public CYIAbstractTextAtlas
{
public:
    CYISDFTextAtlas(int32_t nSDFFontSize = 64, int32_t nSDFRadius = 4);
    virtual ~CYISDFTextAtlas();

    virtual bool CreateNewFontAtlas(uint32_t uWidth, uint32_t uHeight) override;

    virtual void SetRegion(ssize_t nID, void *pReference, YI_REGION Region, const uint8_t *pData, const int32_t nStride) override;

    int32_t GetSDFFontSize() const;

    int32_t GetSDFRadius() const;

protected:
    virtual bool CompareGlyphDetails(YI_GLYPH_DETAILS *pLeft, YI_GLYPH_DETAILS *pRight) const override;

private:
    int32_t m_nSDFFontSize;
    int32_t m_nSDFRadius;

    void RenderGlyphToScratchBuffer(double *pScratchBuffer,
                                    const int32_t nScratchBufferSize,
                                    const int32_t nXScratchStart,
                                    const int32_t nYScratchStart,
                                    const YI_REGION atlasRegion,
                                    const uint8_t *pGlyphData,
                                    const int32_t nGlyphDataStride) const;

    void MakeSignedFieldMap(int32_t nBufferSize, double *pBuffer);
};

#endif