C++ SkGlyph::getGlyphID方法代码示例

inline void GrStencilAndCoverTextContext::TextRun::appendGlyph(const SkGlyph& glyph,
                                                               const SkPoint& pos,
                                                               FallbackBlobBuilder* fallback) {
    // Stick the glyphs we can't draw into the fallback text blob.
    if (SkMask::kARGB32_Format == glyph.fMaskFormat) {
        if (!fallback->isInitialized()) {
            fallback->init(fFont, fTextRatio);
        }
        fallback->appendGlyph(glyph.getGlyphID(), pos);
    } else {
        fInstanceData->append(glyph.getGlyphID(), fTextInverseRatio * pos.x(),
                              fTextInverseRatio * pos.y());
    }
}

bool SkScalerContext_DW::getColorGlyphRun(const SkGlyph& glyph,
        IDWriteColorGlyphRunEnumerator** colorGlyph)
{
    FLOAT advance = 0;
    UINT16 glyphId = glyph.getGlyphID();

    DWRITE_GLYPH_OFFSET offset;
    offset.advanceOffset = 0.0f;
    offset.ascenderOffset = 0.0f;

    DWRITE_GLYPH_RUN run;
    run.glyphCount = 1;
    run.glyphAdvances = &advance;
    run.fontFace = fTypeface->fDWriteFontFace.get();
    run.fontEmSize = SkScalarToFloat(fTextSizeRender);
    run.bidiLevel = 0;
    run.glyphIndices = &glyphId;
    run.isSideways = FALSE;
    run.glyphOffsets = &offset;

    HRESULT hr = fFactory2->TranslateColorGlyphRun(
                     0, 0, &run, nullptr, fMeasuringMode, &fXform, 0, colorGlyph);
    if (hr == DWRITE_E_NOCOLOR) {
        return false;
    }
    HRBM(hr, "Failed to translate color glyph run");
    return true;
}

void SkScalerContext_CairoFT::generateImage(const SkGlyph& glyph)
{
    SkASSERT(fScaledFont != nullptr);
    CairoLockedFTFace faceLock(fScaledFont);
    FT_Face face = faceLock.getFace();

    FT_Error err = FT_Load_Glyph(face, glyph.getGlyphID(), fLoadGlyphFlags);

    if (err != 0) {
        memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight);
        return;
    }

    prepareGlyph(face->glyph);

    bool useLcdFilter =
        face->glyph->format == FT_GLYPH_FORMAT_OUTLINE &&
        isLCD(glyph) &&
        gSetLcdFilter;
    if (useLcdFilter) {
        gSetLcdFilter(face->glyph->library, fLcdFilter);
    }

    generateGlyphImage(face, glyph);

    if (useLcdFilter) {
        gSetLcdFilter(face->glyph->library, FT_LCD_FILTER_NONE);
    }
}

void GrTextUtils::BmpAppendGlyph(GrAtlasTextBlob* blob, int runIndex,
                                 GrBatchFontCache* fontCache,
                                 GrBatchTextStrike** strike, const SkGlyph& skGlyph,
                                 int vx, int vy, GrColor color, GrFontScaler* scaler) {
    if (!*strike) {
        *strike = fontCache->getStrike(scaler);
    }

    GrGlyph::PackedID id = GrGlyph::Pack(skGlyph.getGlyphID(),
                                         skGlyph.getSubXFixed(),
                                         skGlyph.getSubYFixed(),
                                         GrGlyph::kCoverage_MaskStyle);
    GrGlyph* glyph = (*strike)->getGlyph(skGlyph, id, scaler);
    if (!glyph) {
        return;
    }

    int x = vx + glyph->fBounds.fLeft;
    int y = vy + glyph->fBounds.fTop;

    // keep them as ints until we've done the clip-test
    int width = glyph->fBounds.width();
    int height = glyph->fBounds.height();

    SkRect r;
    r.fLeft = SkIntToScalar(x);
    r.fTop = SkIntToScalar(y);
    r.fRight = r.fLeft + SkIntToScalar(width);
    r.fBottom = r.fTop + SkIntToScalar(height);

    blob->appendGlyph(runIndex, r, color, *strike, glyph, scaler, skGlyph,
                      SkIntToScalar(vx), SkIntToScalar(vy), 1.0f, false);
}

inline void GrStencilAndCoverTextContext::appendGlyph(const SkGlyph& glyph, const SkPoint& pos) {
    // Stick the glyphs we can't draw into the fallback arrays.
    if (SkMask::kARGB32_Format == glyph.fMaskFormat) {
        fFallbackIndices.push_back(glyph.getGlyphID());
        fFallbackPositions.push_back().set(fTextInverseRatio * pos.x(),
                                           -fTextInverseRatio * pos.y());
    } else {
        // TODO: infer the reserve count from the text length.
        if (!fDraw) {
            fDraw = GrPathRangeDraw::Create(fGlyphs,
                                            GrPathRendering::kTranslate_PathTransformType,
                                            64);
        }
        float translate[] = { fTextInverseRatio * pos.x(), -fTextInverseRatio * pos.y() };
        fDraw->append(glyph.getGlyphID(), translate);
    }
}

inline void GrStencilAndCoverTextContext::appendGlyph(const SkGlyph& glyph, const SkPoint& pos) {
    if (fQueuedGlyphCount >= fFallbackGlyphsIdx) {
        SkASSERT(fQueuedGlyphCount == fFallbackGlyphsIdx);
        this->flush();
    }

    // Stick the glyphs we can't draw at the end of the buffer, growing backwards.
    int index = (SkMask::kARGB32_Format == glyph.fMaskFormat) ?
                --fFallbackGlyphsIdx : fQueuedGlyphCount++;

    fGlyphIndices[index] = glyph.getGlyphID();
    fGlyphPositions[index].set(fTextInverseRatio * pos.x(), -fTextInverseRatio * pos.y());
}

void SkScalerContext_CairoFT::generateImage(const SkGlyph& glyph)
{
    SkASSERT(fScaledFont != NULL);
    CairoLockedFTFace faceLock(fScaledFont);
    FT_Face face = faceLock.getFace();

    FT_Error err = FT_Load_Glyph(face, glyph.getGlyphID(), fLoadGlyphFlags);

    if (err != 0) {
        memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight);
        return;
    }

    generateGlyphImage(face, glyph);
}

void SkRandomScalerContext::generateImage(const SkGlyph& glyph) {
    SkMask::Format format = (SkMask::Format)glyph.fMaskFormat;
    switch (glyph.getGlyphID() % 4) {
        case 0:
            format = SkMask::kLCD16_Format;
            break;
        case 1:
            format = SkMask::kA8_Format;
            break;
        case 2:
            format = SkMask::kARGB32_Format;
            break;
        case 3:
            format = SkMask::kBW_Format;
            break;
    }
    const_cast<SkGlyph&>(glyph).fMaskFormat = format;

    // if the format is ARGB, we just draw the glyph from path ourselves.  Otherwise, we force
    // our proxy context to generate the image from paths.
    if (!fFakeIt) {
        if (SkMask::kARGB32_Format == glyph.fMaskFormat) {
            SkPath path;
            fProxy->getPath(glyph, &path);

            SkBitmap bm;
            bm.installPixels(SkImageInfo::MakeN32Premul(glyph.fWidth, glyph.fHeight),
                             glyph.fImage, glyph.rowBytes());
            bm.eraseColor(0);

            SkCanvas canvas(bm);
            canvas.translate(-SkIntToScalar(glyph.fLeft),
                             -SkIntToScalar(glyph.fTop));
            canvas.drawPath(path, fFace->paint());
        } else {
            fProxy->forceGenerateImageFromPath();
            fProxy->getImage(glyph);
            fProxy->forceOffGenerateImageFromPath();
        }
    } else {
        sk_bzero(glyph.fImage, glyph.computeImageSize());
    }
}

void SkScalerContext_Ascender::generateImage(const SkGlyph& glyph)
{
    aca_GlyphImageRec   rec;
    aca_Vector          topLeft;
    
    aca_Rasterize(glyph.getGlyphID(), fHandle, &rec, &topLeft);
    
    const uint8_t* src = (const uint8_t*)rec.buffer;
    uint8_t* dst = (uint8_t*)glyph.fImage;
    int height = glyph.fHeight;
    
    src += rec.y0 * rec.pitch + rec.x0;
    while (--height >= 0)
    {
        memcpy(dst, src, glyph.fWidth);
        src += rec.pitch;
        dst += glyph.fRowBytes;
    }
}

bool GrTextUtils::DfAppendGlyph(GrAtlasTextBlob* blob, int runIndex, GrBatchFontCache* cache,
                                GrBatchTextStrike** strike, const SkGlyph& skGlyph,
                                SkScalar sx, SkScalar sy, GrColor color,
                                GrFontScaler* scaler,
                                SkScalar textRatio, const SkMatrix& viewMatrix) {
    if (!*strike) {
        *strike = cache->getStrike(scaler);
    }

    GrGlyph::PackedID id = GrGlyph::Pack(skGlyph.getGlyphID(),
                                         skGlyph.getSubXFixed(),
                                         skGlyph.getSubYFixed(),
                                         GrGlyph::kDistance_MaskStyle);
    GrGlyph* glyph = (*strike)->getGlyph(skGlyph, id, scaler);
    if (!glyph) {
        return true;
    }

    // fallback to color glyph support
    if (kA8_GrMaskFormat != glyph->fMaskFormat) {
        return false;
    }

    SkScalar dx = SkIntToScalar(glyph->fBounds.fLeft + SK_DistanceFieldInset);
    SkScalar dy = SkIntToScalar(glyph->fBounds.fTop + SK_DistanceFieldInset);
    SkScalar width = SkIntToScalar(glyph->fBounds.width() - 2 * SK_DistanceFieldInset);
    SkScalar height = SkIntToScalar(glyph->fBounds.height() - 2 * SK_DistanceFieldInset);

    SkScalar scale = textRatio;
    dx *= scale;
    dy *= scale;
    width *= scale;
    height *= scale;
    sx += dx;
    sy += dy;
    SkRect glyphRect = SkRect::MakeXYWH(sx, sy, width, height);

    blob->appendGlyph(runIndex, glyphRect, color, *strike, glyph, scaler, skGlyph,
                      sx - dx, sy - dy, scale, true);
    return true;
}

void SkScalerContext_CairoFT::generatePath(const SkGlyph& glyph, SkPath* path)
{
    SkASSERT(fScaledFont != NULL);
    CairoLockedFTFace faceLock(fScaledFont);
    FT_Face face = faceLock.getFace();

    SkASSERT(&glyph && path);

    uint32_t flags = fLoadGlyphFlags;
    flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline
    flags &= ~FT_LOAD_RENDER;   // don't scan convert (we just want the outline)

    FT_Error err = FT_Load_Glyph(face, glyph.getGlyphID(), flags);

    if (err != 0) {
        path->reset();
        return;
    }

    generateGlyphPath(face, path);
}

void SkScalerContext_Windows::generateImage(const SkGlyph& glyph) {

    SkAutoMutexAcquire  ac(gFTMutex);

    SkASSERT(fDDC);

    const bool isBW = SkMask::kBW_Format == fRec.fMaskFormat;
    if ((SkMask::kLCD16_Format == fRec.fMaskFormat) || isBW) {
        HDC dc = CreateCompatibleDC(0);
        void* bits = 0;
        int biWidth = isBW ? alignTo32(glyph.fWidth) : glyph.fWidth;
        MyBitmapInfo info;
        sk_bzero(&info, sizeof(info));
        if (isBW) {
            RGBQUAD blackQuad = { 0, 0, 0, 0 };
            RGBQUAD whiteQuad = { 0xFF, 0xFF, 0xFF, 0 };
            info.bmiColors[0] = blackQuad;
            info.bmiColors[1] = whiteQuad;
        }
        info.bmiHeader.biSize = sizeof(info.bmiHeader);
        info.bmiHeader.biWidth = biWidth;
        info.bmiHeader.biHeight = glyph.fHeight;
        info.bmiHeader.biPlanes = 1;
        info.bmiHeader.biBitCount = isBW ? 1 : 32;
        info.bmiHeader.biCompression = BI_RGB;
        if (isBW) {
            info.bmiHeader.biClrUsed = 2;
        }
        HBITMAP bm = CreateDIBSection(dc, &info, DIB_RGB_COLORS, &bits, 0, 0);
        SelectObject(dc, bm);

        // erase to white
        size_t srcRB = isBW ? (biWidth >> 3) : (glyph.fWidth << 2);
        size_t size = glyph.fHeight * srcRB;
        memset(bits, isBW ? 0 : 0xFF, size);

        SetGraphicsMode(dc, GM_ADVANCED);
        SetBkMode(dc, TRANSPARENT);
        SetTextAlign(dc, TA_LEFT | TA_BASELINE);

        XFORM xform = fXform;
        xform.eDx = (float)-glyph.fLeft;
        xform.eDy = (float)-glyph.fTop;
        SetWorldTransform(dc, &xform);

        HGDIOBJ prevFont = SelectObject(dc, fFont);
        COLORREF color = SetTextColor(dc, isBW ? 0xFFFFFF : 0);
        SkASSERT(color != CLR_INVALID);
        uint16_t glyphID = glyph.getGlyphID();
#if defined(UNICODE)
        ExtTextOut(dc, 0, 0, ETO_GLYPH_INDEX, NULL, (LPCWSTR)&glyphID, 1, NULL);
#else
        ExtTextOut(dc, 0, 0, ETO_GLYPH_INDEX, NULL, (LPCSTR)&glyphID, 1, NULL);
#endif
        GdiFlush();

        // downsample from rgba to rgb565
        int width = glyph.fWidth;
        size_t dstRB = glyph.rowBytes();
        if (isBW) {
            const uint8_t* src = (const uint8_t*)bits;
            // gdi's bitmap is upside-down, so we reverse dst walking in Y
            uint8_t* dst = (uint8_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB);
            for (int y = 0; y < glyph.fHeight; y++) {
                memcpy(dst, src, dstRB);
                src += srcRB;
                dst -= dstRB;
            }
        } else {    // LCD16
            const uint32_t* src = (const uint32_t*)bits;
            // gdi's bitmap is upside-down, so we reverse dst walking in Y
            uint16_t* dst = (uint16_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB);
            for (int y = 0; y < glyph.fHeight; y++) {
                for (int i = 0; i < width; i++) {
                    dst[i] = rgb_to_lcd16(src[i]);
                }
                src = (const uint32_t*)((const char*)src + srcRB);
                dst = (uint16_t*)((char*)dst - dstRB);
            }
        }

        DeleteDC(dc);
        DeleteObject(bm);
        return;
    }

void SkScalerContext_Windows::generateImage(const SkGlyph& glyph) {

    SkAutoMutexAcquire  ac(gFTMutex);

    SkASSERT(fDDC);

    if (SkMask::kLCD16_Format == fRec.fMaskFormat) {
        HDC dc = CreateCompatibleDC(0);
        void* bits = 0;
        BITMAPINFO info;
        sk_bzero(&info, sizeof(info));
        info.bmiHeader.biSize = sizeof(info.bmiHeader);
        info.bmiHeader.biWidth = glyph.fWidth;
        info.bmiHeader.biHeight = glyph.fHeight;
        info.bmiHeader.biPlanes = 1;
        info.bmiHeader.biBitCount = 32;
        info.bmiHeader.biCompression = BI_RGB;
        HBITMAP bm = CreateDIBSection(dc, &info, DIB_RGB_COLORS, &bits, 0, 0);
        SelectObject(dc, bm);

        // erase to white
        size_t srcRB = glyph.fWidth << 2;
        size_t size = glyph.fHeight * srcRB;
        memset(bits, 0xFF, size);

        SetBkMode(dc, TRANSPARENT);
        SetTextAlign(dc, TA_LEFT | TA_BASELINE);
        SetGraphicsMode(dc, GM_ADVANCED);

        XFORM xform = fXform;
        xform.eDx = (float)-glyph.fLeft;
        xform.eDy = (float)-glyph.fTop;
        SetWorldTransform(dc, &xform);

        HGDIOBJ prevFont = SelectObject(dc, fFont);
        COLORREF color = SetTextColor(dc, 0); // black
        SkASSERT(color != CLR_INVALID);
        uint16_t glyphID = glyph.getGlyphID();
        ExtTextOut(dc, 0, 0, ETO_GLYPH_INDEX, NULL, (LPCWSTR)&glyphID, 1, NULL);
        GdiFlush();

        // downsample from rgba to rgb565
        int width = glyph.fWidth;
        size_t dstRB = glyph.rowBytes();
        const uint32_t* src = (const uint32_t*)bits;
        // gdi's bitmap is upside-down, so we reverse dst walking in Y
        uint16_t* dst = (uint16_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB);
        for (int y = 0; y < glyph.fHeight; y++) {
            for (int i = 0; i < width; i++) {
                dst[i] = rgb_to_lcd16(src[i]);
            }
            src = (const uint32_t*)((const char*)src + srcRB);
            dst = (uint16_t*)((char*)dst - dstRB);
        }

        DeleteDC(dc);
        DeleteObject(bm);
        return;
    }

    GLYPHMETRICS gm;
    memset(&gm, 0, sizeof(gm));
    uint32_t bytecount = 0;
    uint32_t total_size = GetGlyphOutlineW(fDDC, glyph.fID, GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22);
    if (GDI_ERROR != total_size && total_size > 0) {
        uint8_t *pBuff = new uint8_t[total_size];
        if (NULL != pBuff) {
            total_size = GetGlyphOutlineW(fDDC, glyph.fID, GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, total_size, pBuff, &fMat22);

            SkASSERT(total_size != GDI_ERROR);

            SkASSERT(glyph.fWidth == gm.gmBlackBoxX);
            SkASSERT(glyph.fHeight == gm.gmBlackBoxY);

            uint8_t* dst = (uint8_t*)glyph.fImage;
            uint32_t pitch = (gm.gmBlackBoxX + 3) & ~0x3;
            if (pitch != glyph.rowBytes()) {
                SkASSERT(false); // glyph.fImage has different rowsize!?
            }

            for (int32_t y = gm.gmBlackBoxY - 1; y >= 0; y--) {
                uint8_t* src = pBuff + pitch * y;

                for (uint32_t x = 0; x < gm.gmBlackBoxX; x++) {
                    if (*src > 63) {
                        *dst = 0xFF;
                    }
                    else {
                        *dst = *src << 2; // scale to 0-255
                    }
                    dst++;
                    src++;
                    bytecount++;
                }
                memset(dst, 0, glyph.rowBytes() - glyph.fWidth);
                dst += glyph.rowBytes() - glyph.fWidth;
            }

            delete[] pBuff;
        }
//.........这里部分代码省略.........