C++ SkWriteBuffer::write32方法代码示例

void SkPictureShader::flatten(SkWriteBuffer& buffer) const {
    this->INHERITED::flatten(buffer);

    buffer.write32(fTmx);
    buffer.write32(fTmy);
    fPicture->flatten(buffer);
}

void SkPictureShader::flatten(SkWriteBuffer& buffer) const {
    buffer.writeMatrix(this->getLocalMatrix());
    buffer.write32(fTmx);
    buffer.write32(fTmy);
    buffer.writeRect(fTile);
    fPicture->flatten(buffer);
}

void SkBlurDrawLooper::flatten(SkWriteBuffer& buffer) const {
    buffer.writeColor(fBlurColor);
    buffer.writeScalar(fSigma);
    buffer.writeScalar(fDx);
    buffer.writeScalar(fDy);
    buffer.write32(fBlurFlags);
}

void SkImageInfo::flatten(SkWriteBuffer& buffer) const {
    buffer.write32(fWidth);
    buffer.write32(fHeight);

    SkASSERT(0 == (fAlphaType & ~kAlphaTypeMask));
    SkASSERT(0 == (fColorType & ~kColorTypeMask));
    uint32_t packed = (fAlphaType << 8) | live_to_stored(fColorType);
    buffer.write32(packed);

    if (fColorSpace) {
        sk_sp<SkData> data = fColorSpace->serialize();
        if (data) {
            buffer.writeDataAsByteArray(data.get());
        } else {
            buffer.writeByteArray(nullptr, 0);
        }
    } else {
        sk_sp<SkData> data = SkData::MakeEmpty();
        buffer.writeDataAsByteArray(data.get());
    }
}

void SkMallocPixelRef::flatten(SkWriteBuffer& buffer) const {
    this->INHERITED::flatten(buffer);

    buffer.write32(SkToU32(fRB));

    // TODO: replace this bulk write with a chunky one that can trim off any
    // trailing bytes on each scanline (in case rowbytes > width*size)
    size_t size = this->info().getSafeSize(fRB);
    buffer.writeByteArray(fStorage, size);
    buffer.writeBool(fCTable != NULL);
    if (fCTable) {
        fCTable->writeToBuffer(buffer);
    }
}

/*
 *  Header:
 *      paint flags     : 32
 *      non_def bits    : 16
 *      xfermode enum   : 8
 *      pad zeros       : 8
 */
static void write_paint(SkWriteBuffer& writer, const SkPaint& paint, unsigned usage) {
    uint32_t packedFlags = pack_paint_flags(paint.getFlags(), paint.getHinting(),
                                            paint.getTextAlign(), paint.getFilterQuality(),
                                            paint.getStyle(), paint.getStrokeCap(),
                                            paint.getStrokeJoin(), paint.getTextEncoding());
    writer.write32(packedFlags);

    unsigned nondef = compute_nondef(paint, (PaintUsage)usage);
    const uint8_t pad = 0;
    writer.write32((nondef << 16) | ((unsigned)paint.getBlendMode() << 8) | pad);

    CHECK_WRITE_SCALAR(writer, nondef, paint, TextSize);
    CHECK_WRITE_SCALAR(writer, nondef, paint, TextScaleX);
    CHECK_WRITE_SCALAR(writer, nondef, paint, TextSkewX);
    CHECK_WRITE_SCALAR(writer, nondef, paint, StrokeWidth);
    CHECK_WRITE_SCALAR(writer, nondef, paint, StrokeMiter);

    if (nondef & kColor_NonDef) {
        writer.write32(paint.getColor());
    }
    if (nondef & kTypeface_NonDef) {
        // TODO: explore idea of writing bits indicating "use the prev (or prev N) face"
        // e.g. 1-N bits is an index into a ring buffer of typefaces
        SkTypeface* tf = paint.getTypeface();
        SkASSERT(tf);
        writer.writeTypeface(tf);
    }

    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, PathEffect);
    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, Shader);
    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, MaskFilter);
    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, ColorFilter);
    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, Rasterizer);
    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, ImageFilter);
    CHECK_WRITE_FLATTENABLE(writer, nondef, paint, DrawLooper);
}

void SkPictureData::flatten(SkWriteBuffer& buffer) const {
    write_tag_size(buffer, SK_PICT_READER_TAG, fOpData->size());
    buffer.writeByteArray(fOpData->bytes(), fOpData->size());

    if (fPictureCount > 0) {
        write_tag_size(buffer, SK_PICT_PICTURE_TAG, fPictureCount);
        for (int i = 0; i < fPictureCount; i++) {
            fPictureRefs[i]->flatten(buffer);
        }
    }

    // Write this picture playback's data into a writebuffer
    this->flattenToBuffer(buffer);
    buffer.write32(SK_PICT_EOF_TAG);
}

void SkImageRef::flatten(SkWriteBuffer& buffer) const {
    this->INHERITED::flatten(buffer);

    buffer.writeInt(fSampleSize);
    buffer.writeBool(fDoDither);
    // FIXME: Consider moving this logic should go into writeStream itself.
    // writeStream currently has no other callers, so this may be fine for
    // now.
    if (!fStream->rewind()) {
        SkDEBUGF(("Failed to rewind SkImageRef stream!"));
        buffer.write32(0);
    } else {
        // FIXME: Handle getLength properly here. Perhaps this class should
        // take an SkStreamAsset.
        buffer.writeStream(fStream, fStream->getLength());
    }
}

void SkOpPE::flatten(SkWriteBuffer& buffer) const {
    buffer.writeFlattenable(fOne.get());
    buffer.writeFlattenable(fTwo.get());
    buffer.write32(fOp);
}

void SkComposeShader::flatten(SkWriteBuffer& buffer) const {
    buffer.writeFlattenable(fShaderA.get());
    buffer.writeFlattenable(fShaderB.get());
    buffer.write32((int)fMode);
}

void SkComposeShader::flatten(SkWriteBuffer& buffer) const {
    buffer.writeFlattenable(fDst.get());
    buffer.writeFlattenable(fSrc.get());
    buffer.write32((int)fMode);
    buffer.writeScalar(fLerpT);
}