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 SkGScalerContext::generateImage(const SkGlyph& glyph) {
    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.concat(fMatrix);
        canvas.drawPath(path, fFace->paint());
    } else {
        fProxy->getImage(glyph);
    }
}