Exemplo n.º 1
0
void SkGScalerContext::generateMetrics(SkGlyph* glyph) {
    fProxy->getMetrics(glyph);

    SkVector advance;
    fMatrix.mapXY(SkFloatToScalar(glyph->fAdvanceX),
                  SkFloatToScalar(glyph->fAdvanceY), &advance);
    glyph->fAdvanceX = SkScalarToFloat(advance.fX);
    glyph->fAdvanceY = SkScalarToFloat(advance.fY);

    SkPath path;
    fProxy->getPath(*glyph, &path);
    path.transform(fMatrix);

    SkRect storage;
    const SkPaint& paint = fFace->paint();
    const SkRect& newBounds = paint.doComputeFastBounds(path.getBounds(),
                                                        &storage,
                                                        SkPaint::kFill_Style);
    SkIRect ibounds;
    newBounds.roundOut(&ibounds);
    glyph->fLeft = ibounds.fLeft;
    glyph->fTop = ibounds.fTop;
    glyph->fWidth = ibounds.width();
    glyph->fHeight = ibounds.height();
    glyph->fMaskFormat = SkMask::kARGB32_Format;
}
void SkRandomScalerContext::generateMetrics(SkGlyph* glyph) {
    // Here we will change the mask format of the glyph
    // NOTE this is being overridden by the base class
    SkMask::Format format = SkMask::kARGB32_Format; // init to handle defective compilers
    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;
    }

    fProxy->getMetrics(glyph);

    glyph->fMaskFormat = format;
    if (fFakeIt) {
        return;
    }
    if (SkMask::kARGB32_Format == format) {
        SkPath path;
        fProxy->getPath(*glyph, &path);

        SkRect storage;
        const SkPaint& paint = fFace->paint();
        const SkRect& newBounds = paint.doComputeFastBounds(path.getBounds(),
                                                            &storage,
                                                            SkPaint::kFill_Style);
        SkIRect ibounds;
        newBounds.roundOut(&ibounds);
        glyph->fLeft = ibounds.fLeft;
        glyph->fTop = ibounds.fTop;
        glyph->fWidth = ibounds.width();
        glyph->fHeight = ibounds.height();
    } else {
        SkPath      devPath, fillPath;
        SkMatrix    fillToDevMatrix;

        this->internalGetPath(*glyph, &fillPath, &devPath, &fillToDevMatrix);

        // just use devPath
        const SkIRect ir = devPath.getBounds().roundOut();

        if (ir.isEmpty() || !ir.is16Bit()) {
            glyph->fLeft    = 0;
            glyph->fTop     = 0;
            glyph->fWidth   = 0;
            glyph->fHeight  = 0;
            return;
        }
        glyph->fLeft    = ir.fLeft;
        glyph->fTop     = ir.fTop;
        glyph->fWidth   = SkToU16(ir.width());
        glyph->fHeight  = SkToU16(ir.height());

        if (glyph->fWidth > 0) {
            switch (glyph->fMaskFormat) {
            case SkMask::kLCD16_Format:
                glyph->fWidth += 2;
                glyph->fLeft -= 1;
                break;
            default:
                break;
            }
        }
    }
}