C++ SkAutoTUnref::detach方法代码示例

    SkPicture* onNewPictureSnapshot() override {
        SkBigPicture::SnapshotArray* pictList = NULL;
        if (fDrawableList) {
            // TODO: should we plumb-down the BBHFactory and recordFlags from our host
            //       PictureRecorder?
            pictList = fDrawableList->newDrawableSnapshot();
        }

        SkAutoTUnref<SkLayerInfo> saveLayerData;

        if (fBBH && fDoSaveLayerInfo) {
            saveLayerData.reset(SkNEW(SkLayerInfo));

            SkBBoxHierarchy* bbh = NULL;    // we've already computed fBBH (received in constructor)
            // TODO: update saveLayer info computation to reuse the already computed
            // bounds in 'fBBH'
            SkRecordComputeLayers(fBounds, *fRecord, pictList, bbh, saveLayerData);
        }

        size_t subPictureBytes = 0;
        for (int i = 0; pictList && i < pictList->count(); i++) {
            subPictureBytes += SkPictureUtils::ApproximateBytesUsed(pictList->begin()[i]);
        }
        // SkBigPicture will take ownership of a ref on both fRecord and fBBH.
        // We're not willing to give up our ownership, so we must ref them for SkPicture.
        return SkNEW_ARGS(SkBigPicture, (fBounds,
                                         SkRef(fRecord.get()),
                                         pictList,
                                         SkSafeRef(fBBH.get()),
                                         saveLayerData.detach(),
                                         subPictureBytes));
    }

SkPicture* SkPictureRecorder::endRecordingAsPicture() {
    fActivelyRecording = false;
    fRecorder->restoreToCount(1);  // If we were missing any restores, add them now.

    if (fRecord->count() == 0) {
        return fMiniRecorder.detachAsPicture(fCullRect);
    }

    // TODO: delay as much of this work until just before first playback?
    SkRecordOptimize(fRecord);

    SkAutoTUnref<SkLayerInfo> saveLayerData;

    if (fBBH && (fFlags & kComputeSaveLayerInfo_RecordFlag)) {
        saveLayerData.reset(SkNEW(SkLayerInfo));
    }

    SkDrawableList* drawableList = fRecorder->getDrawableList();
    SkBigPicture::SnapshotArray* pictList =
        drawableList ? drawableList->newDrawableSnapshot() : NULL;

    if (fBBH.get()) {
        if (saveLayerData) {
            SkRecordComputeLayers(fCullRect, *fRecord, pictList, fBBH.get(), saveLayerData);
        } else {
            SkRecordFillBounds(fCullRect, *fRecord, fBBH.get());
        }
        SkRect bbhBound = fBBH->getRootBound();
        SkASSERT((bbhBound.isEmpty() || fCullRect.contains(bbhBound))
            || (bbhBound.isEmpty() && fCullRect.isEmpty()));
        fCullRect = bbhBound;
    }

    size_t subPictureBytes = fRecorder->approxBytesUsedBySubPictures();
    for (int i = 0; pictList && i < pictList->count(); i++) {
        subPictureBytes += SkPictureUtils::ApproximateBytesUsed(pictList->begin()[i]);
    }
    return SkNEW_ARGS(SkBigPicture, (fCullRect,
                                     fRecord.detach(),
                                     pictList,
                                     fBBH.detach(),
                                     saveLayerData.detach(),
                                     subPictureBytes));
}

SkCanvas* PictureRenderer::setupCanvas(int width, int height) {
    SkAutoTUnref<SkCanvas> canvas;

    switch(fDeviceType) {
        case kBitmap_DeviceType: {
            SkBitmap bitmap;
            sk_tools::setup_bitmap(&bitmap, width, height);
            canvas.reset(SkNEW_ARGS(SkCanvas, (bitmap)));
        }
        break;
#if SK_SUPPORT_GPU
#if SK_ANGLE
        case kAngle_DeviceType:
            // fall through
#endif
#if SK_MESA
        case kMesa_DeviceType:
            // fall through
#endif
        case kGPU_DeviceType:
        case kNVPR_DeviceType: {
            SkAutoTUnref<GrSurface> target;
            if (fGrContext) {
                // create a render target to back the device
                GrSurfaceDesc desc;
                desc.fConfig = kSkia8888_GrPixelConfig;
                desc.fFlags = kRenderTarget_GrSurfaceFlag;
                desc.fWidth = width;
                desc.fHeight = height;
                desc.fSampleCnt = fSampleCount;
                target.reset(fGrContext->textureProvider()->createTexture(desc, false, NULL, 0));
            }

            uint32_t flags = fUseDFText ? SkSurfaceProps::kUseDistanceFieldFonts_Flag : 0;
            SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
            SkAutoTUnref<SkGpuDevice> device(
                SkGpuDevice::Create(target->asRenderTarget(), &props,
                                    SkGpuDevice::kUninit_InitContents));
            if (!device) {
                return NULL;
            }
            canvas.reset(SkNEW_ARGS(SkCanvas, (device)));
            break;
        }
#endif
        default:
            SkASSERT(0);
            return NULL;
    }

    if (fHasDrawFilters) {
        if (fDrawFilters[0] & PictureRenderer::kAAClip_DrawFilterFlag) {
            canvas->setAllowSoftClip(false);
        }

        canvas.reset(SkNEW_ARGS(FlagsFilterCanvas, (canvas.get(), fDrawFilters)));
    }

    this->scaleToScaleFactor(canvas);

    // Pictures often lie about their extent (i.e., claim to be 100x100 but
    // only ever draw to 90x100). Clear here so the undrawn portion will have
    // a consistent color
    canvas->clear(SK_ColorTRANSPARENT);
    return canvas.detach();
}

//.........这里部分代码省略.........
            }
            tiledRenderer->setTileWidthPercentage(atof(widthString));
            if (!(tiledRenderer->getTileWidthPercentage() > 0)) {
                error.printf("--mode %s must be given a width percentage > 0\n", mode);
                return NULL;
            }
        } else {
            tiledRenderer->setTileWidth(atoi(widthString));
            if (!(tiledRenderer->getTileWidth() > 0)) {
                error.printf("--mode %s must be given a width > 0\n", mode);
                return NULL;
            }
        }

        if (sk_tools::is_percentage(heightString)) {
            if (isCopyMode) {
                error.printf("--mode %s does not support percentages.\n", mode);
                return NULL;
            }
            tiledRenderer->setTileHeightPercentage(atof(heightString));
            if (!(tiledRenderer->getTileHeightPercentage() > 0)) {
                error.printf("--mode %s must be given a height percentage > 0\n", mode);
                return NULL;
            }
        } else {
            tiledRenderer->setTileHeight(atoi(heightString));
            if (!(tiledRenderer->getTileHeight() > 0)) {
                SkString err;
                error.printf("--mode %s must be given a height > 0\n", mode);
                return NULL;
            }
        }

        renderer.reset(tiledRenderer.detach());
        if (FLAGS_pipe) {
            error.printf("Pipe rendering is currently not compatible with tiling.\n"
                         "Turning off pipe.\n");
        }

    } else { // useTiles
        if (FLAGS_multi > 1) {
            error.printf("Multithreaded drawing requires tiled rendering.\n");
            return NULL;
        }
        if (FLAGS_pipe) {
            if (renderer != NULL) {
                error.printf("Pipe is incompatible with other modes.\n");
                return NULL;
            }
            renderer.reset(SkNEW(sk_tools::PipePictureRenderer));
        }
    }

    if (NULL == renderer) {
        renderer.reset(SkNEW(sk_tools::SimplePictureRenderer));
    }

    if (FLAGS_viewport.count() > 0) {
        if (FLAGS_viewport.count() != 2) {
            error.printf("--viewport requires a width and a height.\n");
            return NULL;
        }
        SkISize viewport;
        viewport.fWidth = atoi(FLAGS_viewport[0]);
        viewport.fHeight = atoi(FLAGS_viewport[1]);
        renderer->setViewport(viewport);

SkImageFilter* SkiaImageFilterBuilder::build(const FilterOperations& operations)
{
    SkAutoTUnref<SkImageFilter> filter;
    SkScalar matrix[20];
    for (size_t i = 0; i < operations.size(); ++i) {
        const FilterOperation& op = *operations.at(i);
        switch (op.getOperationType()) {
        case FilterOperation::REFERENCE: {
            FilterEffect* filterEffect = static_cast<const ReferenceFilterOperation*>(&op)->filterEffect();
            // FIXME: hook up parent filter to image source
            filter.reset(SkiaImageFilterBuilder::build(filterEffect));
            break;
        }
        case FilterOperation::GRAYSCALE: {
            float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount();
            getGrayscaleMatrix(1 - amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::SEPIA: {
            float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount();
            getSepiaMatrix(1 - amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::SATURATE: {
            float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount();
            getSaturateMatrix(amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::HUE_ROTATE: {
            float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount();
            getHueRotateMatrix(amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::INVERT: {
            float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount();
            getInvertMatrix(amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::OPACITY: {
            float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount();
            getOpacityMatrix(amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::BRIGHTNESS: {
            float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount();
            getBrightnessMatrix(amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::CONTRAST: {
            float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount();
            getContrastMatrix(amount, matrix);
            filter.reset(createMatrixImageFilter(matrix, filter));
            break;
        }
        case FilterOperation::BLUR: {
            float pixelRadius = static_cast<const BlurFilterOperation*>(&op)->stdDeviation().getFloatValue();
            filter.reset(new SkBlurImageFilter(pixelRadius, pixelRadius, filter));
            break;
        }
        case FilterOperation::DROP_SHADOW: {
            const DropShadowFilterOperation* drop = static_cast<const DropShadowFilterOperation*>(&op);
            filter.reset(new DropShadowImageFilter(SkIntToScalar(drop->x()), SkIntToScalar(drop->y()), SkIntToScalar(drop->stdDeviation()), drop->color().rgb(), filter));
            break;
        }
        case FilterOperation::VALIDATED_CUSTOM:
        case FilterOperation::CUSTOM:
            // Not supported.
        case FilterOperation::PASSTHROUGH:
        case FilterOperation::NONE:
            break;
        }
    }
    return filter.detach();
}

//.........这里部分代码省略.........
            }
            tiledRenderer->setTileWidthPercentage(atof(widthString));
            if (!(tiledRenderer->getTileWidthPercentage() > 0)) {
                error.printf("--mode %s must be given a width percentage > 0\n", mode);
                return NULL;
            }
        } else {
            tiledRenderer->setTileWidth(atoi(widthString));
            if (!(tiledRenderer->getTileWidth() > 0)) {
                error.printf("--mode %s must be given a width > 0\n", mode);
                return NULL;
            }
        }

        if (sk_tools::is_percentage(heightString)) {
            if (isCopyMode) {
                error.printf("--mode %s does not support percentages.\n", mode);
                return NULL;
            }
            tiledRenderer->setTileHeightPercentage(atof(heightString));
            if (!(tiledRenderer->getTileHeightPercentage() > 0)) {
                error.printf("--mode %s must be given a height percentage > 0\n", mode);
                return NULL;
            }
        } else {
            tiledRenderer->setTileHeight(atoi(heightString));
            if (!(tiledRenderer->getTileHeight() > 0)) {
                SkString err;
                error.printf("--mode %s must be given a height > 0\n", mode);
                return NULL;
            }
        }

        renderer.reset(tiledRenderer.detach());
        if (FLAGS_pipe) {
            error.printf("Pipe rendering is currently not compatible with tiling.\n"
                         "Turning off pipe.\n");
        }

    } else { // useTiles
        if (FLAGS_pipe) {
            if (renderer != NULL) {
                error.printf("Pipe is incompatible with other modes.\n");
                return NULL;
            }
            renderer.reset(SkNEW_ARGS(sk_tools::PipePictureRenderer, RENDERER_ARGS));
        }
    }

    if (NULL == renderer) {
        renderer.reset(SkNEW_ARGS(sk_tools::SimplePictureRenderer, RENDERER_ARGS));
    }

    if (FLAGS_viewport.count() > 0) {
        if (FLAGS_viewport.count() != 2) {
            error.printf("--viewport requires a width and a height.\n");
            return NULL;
        }
        SkISize viewport;
        viewport.fWidth = atoi(FLAGS_viewport[0]);
        viewport.fHeight = atoi(FLAGS_viewport[1]);
        renderer->setViewport(viewport);
    }

    sk_tools::PictureRenderer::SkDeviceTypes deviceType =
        sk_tools::PictureRenderer::kBitmap_DeviceType;