Example #1
0
SkCodec::Result SkAndroidCodec::getAndroidPixels(const SkImageInfo& requestInfo,
        void* requestPixels, size_t requestRowBytes, const AndroidOptions* options) {
    if (!requestPixels) {
        return SkCodec::kInvalidParameters;
    }
    if (requestRowBytes < requestInfo.minRowBytes()) {
        return SkCodec::kInvalidParameters;
    }

    SkImageInfo adjustedInfo = fInfo;
    if (ExifOrientationBehavior::kRespect == fOrientationBehavior
            && SkPixmapPriv::ShouldSwapWidthHeight(fCodec->getOrigin())) {
        adjustedInfo = SkPixmapPriv::SwapWidthHeight(adjustedInfo);
    }

    AndroidOptions defaultOptions;
    if (!options) {
        options = &defaultOptions;
    } else if (options->fSubset) {
        if (!is_valid_subset(*options->fSubset, adjustedInfo.dimensions())) {
            return SkCodec::kInvalidParameters;
        }

        if (SkIRect::MakeSize(adjustedInfo.dimensions()) == *options->fSubset) {
            // The caller wants the whole thing, rather than a subset. Modify
            // the AndroidOptions passed to onGetAndroidPixels to not specify
            // a subset.
            defaultOptions = *options;
            defaultOptions.fSubset = nullptr;
            options = &defaultOptions;
        }
    }

    if (ExifOrientationBehavior::kIgnore == fOrientationBehavior) {
        return this->onGetAndroidPixels(requestInfo, requestPixels, requestRowBytes, *options);
    }

    SkCodec::Result result;
    auto decode = [this, options, &result](const SkPixmap& pm) {
        result = this->onGetAndroidPixels(pm.info(), pm.writable_addr(), pm.rowBytes(), *options);
        return acceptable_result(result);
    };

    SkPixmap dst(requestInfo, requestPixels, requestRowBytes);
    if (SkPixmapPriv::Orient(dst, fCodec->getOrigin(), decode)) {
        return result;
    }

    // Orient returned false. If onGetAndroidPixels succeeded, then Orient failed internally.
    if (acceptable_result(result)) {
        return SkCodec::kInternalError;
    }

    return result;
}
Example #2
0
SkCodec::Result SkCodec::startScanlineDecode(const SkImageInfo& dstInfo,
        const SkCodec::Options* options, SkPMColor ctable[], int* ctableCount) {
    // Reset fCurrScanline in case of failure.
    fCurrScanline = -1;
    // Ensure that valid color ptrs are passed in for kIndex8 color type
    if (kIndex_8_SkColorType == dstInfo.colorType()) {
        if (nullptr == ctable || nullptr == ctableCount) {
            return SkCodec::kInvalidParameters;
        }
    } else {
        if (ctableCount) {
            *ctableCount = 0;
        }
        ctableCount = nullptr;
        ctable = nullptr;
    }

    if (!this->rewindIfNeeded()) {
        return kCouldNotRewind;
    }

    // Set options.
    Options optsStorage;
    if (nullptr == options) {
        options = &optsStorage;
    } else if (options->fSubset) {
        SkIRect size = SkIRect::MakeSize(dstInfo.dimensions());
        if (!size.contains(*options->fSubset)) {
            return kInvalidInput;
        }

        // We only support subsetting in the x-dimension for scanline decoder.
        // Subsetting in the y-dimension can be accomplished using skipScanlines().
        if (options->fSubset->top() != 0 || options->fSubset->height() != dstInfo.height()) {
            return kInvalidInput;
        }
    }

    // FIXME: Support subsets somehow?
    if (!this->dimensionsSupported(dstInfo.dimensions())) {
        return kInvalidScale;
    }

    const Result result = this->onStartScanlineDecode(dstInfo, *options, ctable, ctableCount);
    if (result != SkCodec::kSuccess) {
        return result;
    }

    fCurrScanline = 0;
    fDstInfo = dstInfo;
    fOptions = *options;
    return kSuccess;
}
Example #3
0
/*
 * Initiates the bitmap decode
 */
SkCodec::Result SkBmpMaskCodec::onGetPixels(const SkImageInfo& dstInfo,
                                            void* dst, size_t dstRowBytes,
                                            const Options& opts,
                                            SkPMColor* inputColorPtr,
                                            int* inputColorCount) {
    if (!this->rewindIfNeeded()) {
        return kCouldNotRewind;
    }
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }
    if (dstInfo.dimensions() != this->getInfo().dimensions()) {
        SkCodecPrintf("Error: scaling not supported.\n");
        return kInvalidScale;
    }

    if (!conversion_possible(dstInfo, this->getInfo())) {
        SkCodecPrintf("Error: cannot convert input type to output type.\n");
        return kInvalidConversion;
    }

    // Initialize a the mask swizzler
    if (!this->initializeSwizzler(dstInfo)) {
        SkCodecPrintf("Error: cannot initialize swizzler.\n");
        return kInvalidConversion;
    }

    return this->decode(dstInfo, dst, dstRowBytes, opts);
}
Example #4
0
sk_sp<SkAnimatedImage> SkAnimatedImage::Make(std::unique_ptr<SkAndroidCodec> codec,
        const SkImageInfo& requestedInfo, SkIRect cropRect, sk_sp<SkPicture> postProcess) {
    if (!codec) {
        return nullptr;
    }

    auto scaledSize = requestedInfo.dimensions();
    auto decodeInfo = requestedInfo;
    if (codec->getEncodedFormat() != SkEncodedImageFormat::kWEBP
            || scaledSize.width()  >= decodeInfo.width()
            || scaledSize.height() >= decodeInfo.height()) {
        // Only libwebp can decode to arbitrary smaller sizes.
        auto dims = codec->getInfo().dimensions();
        decodeInfo = decodeInfo.makeWH(dims.width(), dims.height());
    }

    auto image = sk_sp<SkAnimatedImage>(new SkAnimatedImage(std::move(codec), scaledSize,
                decodeInfo, cropRect, std::move(postProcess)));
    if (!image->fDisplayFrame.fBitmap.getPixels()) {
        // tryAllocPixels failed.
        return nullptr;
    }

    return image;
}
Example #5
0
SkCodec::Result SkIcoCodec::onStartScanlineDecode(const SkImageInfo& dstInfo,
        const SkCodec::Options& options, SkPMColor colorTable[], int* colorCount) {
    if (!ico_conversion_possible(dstInfo)) {
        return kInvalidConversion;
    }

    int index = 0;
    SkCodec::Result result = kInvalidScale;
    while (true) {
        index = this->chooseCodec(dstInfo.dimensions(), index);
        if (index < 0) {
            break;
        }

        SkCodec* embeddedCodec = fEmbeddedCodecs->operator[](index);
        SkImageInfo decodeInfo = fix_embedded_alpha(dstInfo, embeddedCodec->getInfo().alphaType());
        result = embeddedCodec->startScanlineDecode(decodeInfo, &options, colorTable, colorCount);
        if (kSuccess == result) {
            fCurrScanlineCodec = embeddedCodec;
            return result;
        }

        index++;
    }

    SkCodecPrintf("Error: No matching candidate image in ico.\n");
    return result;
}
Example #6
0
/*
 * Initiates the bitmap decode
 */
SkCodec::Result SkBmpMaskCodec::onGetPixels(const SkImageInfo& dstInfo,
                                            void* dst, size_t dstRowBytes,
                                            const Options& opts,
                                            int* rowsDecoded) {
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }
    if (dstInfo.dimensions() != this->dimensions()) {
        SkCodecPrintf("Error: scaling not supported.\n");
        return kInvalidScale;
    }

    Result result = this->prepareToDecode(dstInfo, opts);
    if (kSuccess != result) {
        return result;
    }

    int rows = this->decodeRows(dstInfo, dst, dstRowBytes, opts);
    if (rows != dstInfo.height()) {
        *rowsDecoded = rows;
        return kIncompleteInput;
    }
    return kSuccess;
}
Example #7
0
/*
 * Initiates the gif decode
 */
SkCodec::Result SkGifCodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts,
                                        SkPMColor* inputColorPtr,
                                        int* inputColorCount,
                                        int* rowsDecoded) {
    Result result = this->prepareToDecode(dstInfo, inputColorPtr, inputColorCount, opts);
    if (kSuccess != result) {
        return result;
    }

    if (dstInfo.dimensions() != this->getInfo().dimensions()) {
        return gif_error("Scaling not supported.\n", kInvalidScale);
    }

    // Initialize the swizzler
    if (fFrameIsSubset) {
        // Fill the background
        SkSampler::Fill(dstInfo, dst, dstRowBytes, this->getFillValue(dstInfo.colorType()),
                opts.fZeroInitialized);
    }

    // Iterate over rows of the input
    for (int y = fFrameRect.top(); y < fFrameRect.bottom(); y++) {
        if (!this->readRow()) {
            *rowsDecoded = y;
            return gif_error("Could not decode line.\n", kIncompleteInput);
        }
        void* dstRow = SkTAddOffset<void>(dst, dstRowBytes * this->outputScanline(y));
        fSwizzler->swizzle(dstRow, fSrcBuffer.get());
    }
    return kSuccess;
}
Example #8
0
/*
 * Initiates the Ico decode
 */
SkCodec::Result SkIcoCodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts, SkPMColor* ct,
                                        int* ptr) {
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }
    // We return invalid scale if there is no candidate image with matching
    // dimensions.
    Result result = kInvalidScale;
    for (int32_t i = 0; i < fEmbeddedCodecs->count(); i++) {
        // If the dimensions match, try to decode
        if (dstInfo.dimensions() ==
                fEmbeddedCodecs->operator[](i)->getInfo().dimensions()) {

            // Perform the decode
            result = fEmbeddedCodecs->operator[](i)->getPixels(dstInfo,
                    dst, dstRowBytes, &opts, ct, ptr);

            // On a fatal error, keep trying to find an image to decode
            if (kInvalidConversion == result || kInvalidInput == result ||
                    kInvalidScale == result) {
                SkCodecPrintf("Warning: Attempt to decode candidate ico failed.\n");
                continue;
            }

            // On success or partial success, return the result
            return result;
        }
    }

    SkCodecPrintf("Error: No matching candidate image in ico.\n");
    return result;
}
Example #9
0
/*
 * Initiates the bitmap decode
 */
SkCodec::Result SkBmpMaskCodec::onGetPixels(const SkImageInfo& dstInfo,
                                            void* dst, size_t dstRowBytes,
                                            const Options& opts,
                                            SkPMColor* inputColorPtr,
                                            int* inputColorCount,
                                            int* rowsDecoded) {
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }
    if (dstInfo.dimensions() != this->getInfo().dimensions()) {
        SkCodecPrintf("Error: scaling not supported.\n");
        return kInvalidScale;
    }

    if (!conversion_possible(dstInfo, this->getInfo())) {
        SkCodecPrintf("Error: cannot convert input type to output type.\n");
        return kInvalidConversion;
    }

    Result result = this->prepareToDecode(dstInfo, opts, inputColorPtr, inputColorCount);
    if (kSuccess != result) {
        return result;
    }

    int rows = this->decodeRows(dstInfo, dst, dstRowBytes, opts);
    if (rows != dstInfo.height()) {
        *rowsDecoded = rows;
        return kIncompleteInput;
    }
    return kSuccess;
}
void draw(SkCanvas* canvas) {
    const int height = 2;
    const int width = 2;
    SkImageInfo imageInfo = SkImageInfo::Make(width, height, kN32_SkColorType, kPremul_SkAlphaType);
    SkISize dimensions = imageInfo.dimensions();
    SkIRect bounds = imageInfo.bounds();
    SkIRect dimensionsAsBounds = SkIRect::MakeSize(dimensions);
    SkDebugf("dimensionsAsBounds %c= bounds\n", dimensionsAsBounds == bounds ? '=' : '!');
}
Example #11
0
static void check(skiatest::Reporter* r,
                  const char path[],
                  SkISize size,
                  bool supportsScanlineDecoding) {
    SkAutoTDelete<SkStream> stream(resource(path));
    if (!stream) {
        SkDebugf("Missing resource '%s'\n", path);
        return;
    }
    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
    if (!codec) {
        ERRORF(r, "Unable to decode '%s'", path);
        return;
    }

    // This test is used primarily to verify rewinding works properly.  Using kN32 allows
    // us to test this without the added overhead of creating different bitmaps depending
    // on the color type (ex: building a color table for kIndex8).  DM is where we test
    // decodes to all possible destination color types.
    SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
    REPORTER_ASSERT(r, info.dimensions() == size);
    SkBitmap bm;
    bm.allocPixels(info);
    SkAutoLockPixels autoLockPixels(bm);
    SkImageGenerator::Result result =
        codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
    REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);

    SkMD5::Digest digest1, digest2;
    md5(bm, &digest1);

    bm.eraseColor(SK_ColorYELLOW);

    result =
        codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);

    REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
    // verify that re-decoding gives the same result.
    md5(bm, &digest2);
    REPORTER_ASSERT(r, digest1 == digest2);

    SkScanlineDecoder* scanlineDecoder = codec->getScanlineDecoder(info);
    if (supportsScanlineDecoding) {
        bm.eraseColor(SK_ColorYELLOW);
        REPORTER_ASSERT(r, scanlineDecoder);
        for (int y = 0; y < info.height(); y++) {
            result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0);
            REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
        }
        // verify that scanline decoding gives the same result.
        SkMD5::Digest digest3;
        md5(bm, &digest3);
        REPORTER_ASSERT(r, digest3 == digest1);
    } else {
        REPORTER_ASSERT(r, !scanlineDecoder);
    }
}
Example #12
0
static void test_codec(skiatest::Reporter* r, Codec* codec, SkBitmap& bm, const SkImageInfo& info,
        const SkISize& size, SkCodec::Result expectedResult, SkMD5::Digest* digest,
        const SkMD5::Digest* goodDigest) {

    REPORTER_ASSERT(r, info.dimensions() == size);
    bm.allocPixels(info);
    SkAutoLockPixels autoLockPixels(bm);

    SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
    REPORTER_ASSERT(r, result == expectedResult);

    md5(bm, digest);
    if (goodDigest) {
        REPORTER_ASSERT(r, *digest == *goodDigest);
    }

    {
        // Test decoding to 565
        SkImageInfo info565 = info.makeColorType(kRGB_565_SkColorType);
        SkCodec::Result expected565 = info.alphaType() == kOpaque_SkAlphaType ?
                expectedResult : SkCodec::kInvalidConversion;
        test_info(r, codec, info565, expected565, nullptr);
    }

    // Verify that re-decoding gives the same result.  It is interesting to check this after
    // a decode to 565, since choosing to decode to 565 may result in some of the decode
    // options being modified.  These options should return to their defaults on another
    // decode to kN32, so the new digest should match the old digest.
    test_info(r, codec, info, expectedResult, digest);

    {
        // Check alpha type conversions
        if (info.alphaType() == kOpaque_SkAlphaType) {
            test_info(r, codec, info.makeAlphaType(kUnpremul_SkAlphaType),
                      expectedResult, digest);
            test_info(r, codec, info.makeAlphaType(kPremul_SkAlphaType),
                      expectedResult, digest);
        } else {
            // Decoding to opaque should fail
            test_info(r, codec, info.makeAlphaType(kOpaque_SkAlphaType),
                      SkCodec::kInvalidConversion, nullptr);
            SkAlphaType otherAt = info.alphaType();
            if (kPremul_SkAlphaType == otherAt) {
                otherAt = kUnpremul_SkAlphaType;
            } else {
                otherAt = kPremul_SkAlphaType;
            }
            // The other non-opaque alpha type should always succeed, but not match.
            test_info(r, codec, info.makeAlphaType(otherAt), expectedResult, nullptr);
        }
    }
}
Example #13
0
/*
 * Initiates the gif decode
 */
SkCodec::Result SkGifCodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts,
                                        SkPMColor* inputColorPtr,
                                        int* inputColorCount,
                                        int* rowsDecoded) {
    Result result = this->prepareToDecode(dstInfo, inputColorPtr, inputColorCount, opts);
    if (kSuccess != result) {
        return result;
    }

    if (dstInfo.dimensions() != this->getInfo().dimensions()) {
        return gif_error("Scaling not supported.\n", kInvalidScale);
    }

    // Initialize the swizzler
    if (fFrameIsSubset) {
        const SkImageInfo subsetDstInfo = dstInfo.makeWH(fFrameRect.width(), fFrameRect.height());
        if (kSuccess != this->initializeSwizzler(subsetDstInfo, opts)) {
            return gif_error("Could not initialize swizzler.\n", kUnimplemented);
        }

        // Fill the background
        SkSampler::Fill(dstInfo, dst, dstRowBytes,
                this->getFillValue(dstInfo.colorType(), dstInfo.alphaType()),
                opts.fZeroInitialized);

        // Modify the dst pointer
        const int32_t dstBytesPerPixel = SkColorTypeBytesPerPixel(dstInfo.colorType());
        dst = SkTAddOffset<void*>(dst, dstRowBytes * fFrameRect.top() +
                dstBytesPerPixel * fFrameRect.left());
    } else {
        if (kSuccess != this->initializeSwizzler(dstInfo, opts)) {
            return gif_error("Could not initialize swizzler.\n", kUnimplemented);
        }
    }

    // Iterate over rows of the input
    uint32_t height = fFrameRect.height();
    for (uint32_t y = 0; y < height; y++) {
        if (!this->readRow()) {
            *rowsDecoded = y;
            return gif_error("Could not decode line.\n", kIncompleteInput);
        }
        void* dstRow = SkTAddOffset<void>(dst, dstRowBytes * this->outputScanline(y));
        fSwizzler->swizzle(dstRow, fSrcBuffer.get());
    }
    return kSuccess;
}
Example #14
0
SkCodec::Result SkCodec::startScanlineDecode(const SkImageInfo& dstInfo,
        const SkCodec::Options* options, SkPMColor ctable[], int* ctableCount) {
    // Reset fCurrScanline in case of failure.
    fCurrScanline = -1;
    // Ensure that valid color ptrs are passed in for kIndex8 color type
    if (kIndex_8_SkColorType == dstInfo.colorType()) {
        if (nullptr == ctable || nullptr == ctableCount) {
            return SkCodec::kInvalidParameters;
        }
    } else {
        if (ctableCount) {
            *ctableCount = 0;
        }
        ctableCount = nullptr;
        ctable = nullptr;
    }

    if (!this->rewindIfNeeded()) {
        return kCouldNotRewind;
    }

    // Set options.
    Options optsStorage;
    if (nullptr == options) {
        options = &optsStorage;
    } else if (options->fSubset) {
        SkIRect subset(*options->fSubset);
        if (!this->onGetValidSubset(&subset) || subset != *options->fSubset) {
            // FIXME: How to differentiate between not supporting subset at all
            // and not supporting this particular subset?
            return kUnimplemented;
        }
    }

    // FIXME: Support subsets somehow?
    if (!this->dimensionsSupported(dstInfo.dimensions())) {
        return kInvalidScale;
    }

    const Result result = this->onStartScanlineDecode(dstInfo, *options, ctable, ctableCount);
    if (result != SkCodec::kSuccess) {
        return result;
    }

    fCurrScanline = 0;
    fDstInfo = dstInfo;
    fOptions = *options;
    return kSuccess;
}
Example #15
0
SkCodec::Result SkIcoCodec::onStartIncrementalDecode(const SkImageInfo& dstInfo,
        void* pixels, size_t rowBytes, const SkCodec::Options& options,
        SkPMColor* colorTable, int* colorCount) {
    int index = 0;
    while (true) {
        index = this->chooseCodec(dstInfo.dimensions(), index);
        if (index < 0) {
            break;
        }

        SkCodec* embeddedCodec = fEmbeddedCodecs->operator[](index);
        switch (embeddedCodec->startIncrementalDecode(dstInfo,
                pixels, rowBytes, &options, colorTable, colorCount)) {
            case kSuccess:
                fCurrIncrementalCodec = embeddedCodec;
                fCurrScanlineCodec = nullptr;
                return kSuccess;
            case kUnimplemented:
                // FIXME: embeddedCodec is a BMP. If scanline decoding would work,
                // return kUnimplemented so that SkSampledCodec will fall through
                // to use the scanline decoder.
                // Note that calling startScanlineDecode will require an extra
                // rewind. The embedded codec has an SkMemoryStream, which is
                // cheap to rewind, though it will do extra work re-reading the
                // header.
                // Also note that we pass nullptr for Options. This is because
                // Options that are valid for incremental decoding may not be
                // valid for scanline decoding.
                // Once BMP supports incremental decoding this workaround can go
                // away.
                if (embeddedCodec->startScanlineDecode(dstInfo, nullptr,
                        colorTable, colorCount) == kSuccess) {
                    return kUnimplemented;
                }
                // Move on to the next embedded codec.
                break;
            default:
                break;
        }

        index++;
    }

    SkCodecPrintf("Error: No matching candidate image in ico.\n");
    return kInvalidScale;
}
Example #16
0
/*
 * Initiates the Ico decode
 */
SkCodec::Result SkIcoCodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts, SkPMColor* colorTable,
                                        int* colorCount, int* rowsDecoded) {
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }

    if (!ico_conversion_possible(dstInfo)) {
        return kInvalidConversion;
    }

    int index = 0;
    SkCodec::Result result = kInvalidScale;
    while (true) {
        index = this->chooseCodec(dstInfo.dimensions(), index);
        if (index < 0) {
            break;
        }

        SkCodec* embeddedCodec = fEmbeddedCodecs->operator[](index);
        SkImageInfo decodeInfo = fix_embedded_alpha(dstInfo, embeddedCodec->getInfo().alphaType());
        SkASSERT(decodeInfo.colorType() == kN32_SkColorType);
        result = embeddedCodec->getPixels(decodeInfo, dst, dstRowBytes, &opts, colorTable,
                                          colorCount);

        switch (result) {
        case kSuccess:
        case kIncompleteInput:
            // The embedded codec will handle filling incomplete images, so we will indicate
            // that all of the rows are initialized.
            *rowsDecoded = decodeInfo.height();
            return result;
        default:
            // Continue trying to find a valid embedded codec on a failed decode.
            break;
        }

        index++;
    }

    SkCodecPrintf("Error: No matching candidate image in ico.\n");
    return result;
}
Example #17
0
SkCodec::Result SkWebpAdapterCodec::onGetAndroidPixels(const SkImageInfo& info, void* pixels,
        size_t rowBytes, const AndroidOptions& options) {
    // SkWebpCodec will support pretty much any dimensions that we provide, but we want
    // to be stricter about the type of scaling that we allow, so we will add an extra
    // check here.
    SkISize supportedSize;
    if (!options.fSubset) {
        supportedSize = this->onGetSampledDimensions(options.fSampleSize);
    } else {
        supportedSize = this->getSampledSubsetDimensions(options.fSampleSize, *options.fSubset);
    }
    if (supportedSize != info.dimensions()) {
        return SkCodec::kInvalidParameters;
    }

    SkCodec::Options codecOptions;
    codecOptions.fZeroInitialized = options.fZeroInitialized;
    codecOptions.fSubset = options.fSubset;
    return this->codec()->getPixels(info, pixels, rowBytes, &codecOptions, options.fColorPtr,
            options.fColorCount);
}
Example #18
0
    SkCodec::Result onStart(const SkImageInfo& dstInfo, const SkCodec::Options& options,
                            SkPMColor inputColorPtr[], int* inputColorCount) override {
        if (!fCodec->rewindIfNeeded()) {
            return SkCodec::kCouldNotRewind;
        }
        if (options.fSubset) {
            // Subsets are not supported.
            return SkCodec::kUnimplemented;
        }
        if (dstInfo.dimensions() != this->getInfo().dimensions()) {
            if (!SkScaledCodec::DimensionsSupportedForSampling(this->getInfo(), dstInfo)) {
                return SkCodec::kInvalidScale;
            }
        }
        if (!conversion_possible(dstInfo, this->getInfo())) {
            SkCodecPrintf("Error: cannot convert input type to output type.\n");
            return SkCodec::kInvalidConversion;
        }

        return fCodec->prepareToDecode(dstInfo, options, inputColorPtr, inputColorCount);
    }
/*
 * Initiates the bitmap decode
 */
SkCodec::Result SkBmpRLECodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts,
                                        SkPMColor* inputColorPtr,
                                        int* inputColorCount) {
    if (!this->rewindIfNeeded()) {
        return kCouldNotRewind;
    }
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }
    if (dstInfo.dimensions() != this->getInfo().dimensions()) {
        SkCodecPrintf("Error: scaling not supported.\n");
        return kInvalidScale;
    }
    if (!conversion_possible(dstInfo, this->getInfo())) {
        SkCodecPrintf("Error: cannot convert input type to output type.\n");
        return kInvalidConversion;
    }

    // Create the color table if necessary and prepare the stream for decode
    // Note that if it is non-NULL, inputColorCount will be modified
    if (!this->createColorTable(inputColorCount)) {
        SkCodecPrintf("Error: could not create color table.\n");
        return kInvalidInput;
    }

    // Copy the color table to the client if necessary
    copy_color_table(dstInfo, fColorTable, inputColorPtr, inputColorCount);

    // Initialize a swizzler if necessary
    if (!this->initializeStreamBuffer()) {
        SkCodecPrintf("Error: cannot initialize swizzler.\n");
        return kInvalidConversion;
    }

    // Perform the decode
    return decode(dstInfo, dst, dstRowBytes, opts);
}
Example #20
0
SkCodec::Result SkIcoCodec::onStartScanlineDecode(const SkImageInfo& dstInfo,
        const SkCodec::Options& options) {
    int index = 0;
    SkCodec::Result result = kInvalidScale;
    while (true) {
        index = this->chooseCodec(dstInfo.dimensions(), index);
        if (index < 0) {
            break;
        }

        SkCodec* embeddedCodec = fEmbeddedCodecs->operator[](index).get();
        result = embeddedCodec->startScanlineDecode(dstInfo, &options);
        if (kSuccess == result) {
            fCurrCodec = embeddedCodec;
            return result;
        }

        index++;
    }

    SkCodecPrintf("Error: No matching candidate image in ico.\n");
    return result;
}
Example #21
0
/*
 * Initiates the Ico decode
 */
SkCodec::Result SkIcoCodec::onGetPixels(const SkImageInfo& dstInfo,
                                        void* dst, size_t dstRowBytes,
                                        const Options& opts,
                                        int* rowsDecoded) {
    if (opts.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }

    int index = 0;
    SkCodec::Result result = kInvalidScale;
    while (true) {
        index = this->chooseCodec(dstInfo.dimensions(), index);
        if (index < 0) {
            break;
        }

        SkCodec* embeddedCodec = fEmbeddedCodecs->operator[](index).get();
        result = embeddedCodec->getPixels(dstInfo, dst, dstRowBytes, &opts);
        switch (result) {
            case kSuccess:
            case kIncompleteInput:
                // The embedded codec will handle filling incomplete images, so we will indicate
                // that all of the rows are initialized.
                *rowsDecoded = dstInfo.height();
                return result;
            default:
                // Continue trying to find a valid embedded codec on a failed decode.
                break;
        }

        index++;
    }

    SkCodecPrintf("Error: No matching candidate image in ico.\n");
    return result;
}
Example #22
0
static sk_sp<SkImage> make_pict_gen(GrContext*, SkPicture* pic, const SkImageInfo& info) {
    return SkImage::MakeFromPicture(sk_ref_sp(pic), info.dimensions(), nullptr, nullptr);
}
Example #23
0
SkCodec::Result SkCodec::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
                                   const Options* options, SkPMColor ctable[], int* ctableCount) {
    if (kUnknown_SkColorType == info.colorType()) {
        return kInvalidConversion;
    }
    if (nullptr == pixels) {
        return kInvalidParameters;
    }
    if (rowBytes < info.minRowBytes()) {
        return kInvalidParameters;
    }

    if (kIndex_8_SkColorType == info.colorType()) {
        if (nullptr == ctable || nullptr == ctableCount) {
            return kInvalidParameters;
        }
    } else {
        if (ctableCount) {
            *ctableCount = 0;
        }
        ctableCount = nullptr;
        ctable = nullptr;
    }

    {
        SkAlphaType canonical;
        if (!SkColorTypeValidateAlphaType(info.colorType(), info.alphaType(), &canonical)
            || canonical != info.alphaType())
        {
            return kInvalidConversion;
        }
    }

    if (!this->rewindIfNeeded()) {
        return kCouldNotRewind;
    }

    // Default options.
    Options optsStorage;
    if (nullptr == options) {
        options = &optsStorage;
    } else if (options->fSubset) {
        SkIRect subset(*options->fSubset);
        if (!this->onGetValidSubset(&subset) || subset != *options->fSubset) {
            // FIXME: How to differentiate between not supporting subset at all
            // and not supporting this particular subset?
            return kUnimplemented;
        }
    }

    // FIXME: Support subsets somehow? Note that this works for SkWebpCodec
    // because it supports arbitrary scaling/subset combinations.
    if (!this->dimensionsSupported(info.dimensions())) {
        return kInvalidScale;
    }

    // On an incomplete decode, the subclass will specify the number of scanlines that it decoded
    // successfully.
    int rowsDecoded = 0;
    const Result result = this->onGetPixels(info, pixels, rowBytes, *options, ctable, ctableCount,
            &rowsDecoded);

    if ((kIncompleteInput == result || kSuccess == result) && ctableCount) {
        SkASSERT(*ctableCount >= 0 && *ctableCount <= 256);
    }

    // A return value of kIncompleteInput indicates a truncated image stream.
    // In this case, we will fill any uninitialized memory with a default value.
    // Some subclasses will take care of filling any uninitialized memory on
    // their own.  They indicate that all of the memory has been filled by
    // setting rowsDecoded equal to the height.
    if (kIncompleteInput == result && rowsDecoded != info.height()) {
        this->fillIncompleteImage(info, pixels, rowBytes, options->fZeroInitialized, info.height(),
                rowsDecoded);
    }

    return result;
}
Example #24
0
bool SkPixelInfo::CopyPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB,
                             const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRB,
                             SkColorTable* ctable) {
    if (srcInfo.dimensions() != dstInfo.dimensions()) {
        return false;
    }

    const int width = srcInfo.width();
    const int height = srcInfo.height();

    // Handle fancy alpha swizzling if both are ARGB32
    if (4 == srcInfo.bytesPerPixel() && 4 == dstInfo.bytesPerPixel()) {
        SkDstPixelInfo dstPI;
        dstPI.fColorType = dstInfo.colorType();
        dstPI.fAlphaType = dstInfo.alphaType();
        dstPI.fPixels = dstPixels;
        dstPI.fRowBytes = dstRB;

        SkSrcPixelInfo srcPI;
        srcPI.fColorType = srcInfo.colorType();
        srcPI.fAlphaType = srcInfo.alphaType();
        srcPI.fPixels = srcPixels;
        srcPI.fRowBytes = srcRB;

        return srcPI.convertPixelsTo(&dstPI, width, height);
    }

    // If they agree on colorType and the alphaTypes are compatible, then we just memcpy.
    // Note: we've already taken care of 32bit colortypes above.
    if (srcInfo.colorType() == dstInfo.colorType()) {
        switch (srcInfo.colorType()) {
            case kRGB_565_SkColorType:
            case kAlpha_8_SkColorType:
                break;
            case kIndex_8_SkColorType:
            case kARGB_4444_SkColorType:
                if (srcInfo.alphaType() != dstInfo.alphaType()) {
                    return false;
                }
                break;
            default:
                return false;
        }
        rect_memcpy(dstPixels, dstRB, srcPixels, srcRB, width * srcInfo.bytesPerPixel(), height);
        return true;
    }

    /*
     *  Begin section where we try to change colorTypes along the way. Not all combinations
     *  are supported.
     */

    // Can no longer draw directly into 4444, but we can manually whack it for a few combinations
    if (kARGB_4444_SkColorType == dstInfo.colorType() &&
        (kN32_SkColorType == srcInfo.colorType() || kIndex_8_SkColorType == srcInfo.colorType())) {
        if (srcInfo.alphaType() == kUnpremul_SkAlphaType) {
            // Our method for converting to 4444 assumes premultiplied.
            return false;
        }

        const SkPMColor* table = NULL;
        if (kIndex_8_SkColorType == srcInfo.colorType()) {
            if (NULL == ctable) {
                return false;
            }
            table = ctable->readColors();
        }

        for (int y = 0; y < height; ++y) {
            DITHER_4444_SCAN(y);
            SkPMColor16* SK_RESTRICT dstRow = (SkPMColor16*)dstPixels;
            if (table) {
                const uint8_t* SK_RESTRICT srcRow = (const uint8_t*)srcPixels;
                for (int x = 0; x < width; ++x) {
                    dstRow[x] = SkDitherARGB32To4444(table[srcRow[x]], DITHER_VALUE(x));
                }
            } else {
                const SkPMColor* SK_RESTRICT srcRow = (const SkPMColor*)srcPixels;
                for (int x = 0; x < width; ++x) {
                    dstRow[x] = SkDitherARGB32To4444(srcRow[x], DITHER_VALUE(x));
                }
            }
            dstPixels = (char*)dstPixels + dstRB;
            srcPixels = (const char*)srcPixels + srcRB;
        }
        return true;
    }
Example #25
0
static void test_codec(skiatest::Reporter* r, Codec* codec, SkBitmap& bm, const SkImageInfo& info,
        const SkISize& size, SkCodec::Result expectedResult, SkMD5::Digest* digest,
        const SkMD5::Digest* goodDigest) {

    REPORTER_ASSERT(r, info.dimensions() == size);
    bm.allocPixels(info);
    SkAutoLockPixels autoLockPixels(bm);

    SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes());
    REPORTER_ASSERT(r, result == expectedResult);

    md5(bm, digest);
    if (goodDigest) {
        REPORTER_ASSERT(r, *digest == *goodDigest);
    }

    {
        // Test decoding to 565
        SkImageInfo info565 = info.makeColorType(kRGB_565_SkColorType);
        if (info.alphaType() == kOpaque_SkAlphaType) {
            // Decoding to 565 should succeed.
            SkBitmap bm565;
            bm565.allocPixels(info565);
            SkAutoLockPixels alp(bm565);

            // This will allow comparison even if the image is incomplete.
            bm565.eraseColor(SK_ColorBLACK);

            REPORTER_ASSERT(r, expectedResult == codec->getPixels(info565,
                    bm565.getPixels(), bm565.rowBytes()));

            SkMD5::Digest digest565;
            md5(bm565, &digest565);

            // A dumb client's request for non-opaque should also succeed.
            for (auto alpha : { kPremul_SkAlphaType, kUnpremul_SkAlphaType }) {
                info565 = info565.makeAlphaType(alpha);
                test_info(r, codec, info565, expectedResult, &digest565);
            }
        } else {
            test_info(r, codec, info565, SkCodec::kInvalidConversion, nullptr);
        }
    }

    if (codec->getInfo().colorType() == kGray_8_SkColorType) {
        SkImageInfo grayInfo = codec->getInfo();
        SkBitmap grayBm;
        grayBm.allocPixels(grayInfo);
        SkAutoLockPixels alp(grayBm);

        grayBm.eraseColor(SK_ColorBLACK);

        REPORTER_ASSERT(r, expectedResult == codec->getPixels(grayInfo,
                grayBm.getPixels(), grayBm.rowBytes()));

        SkMD5::Digest grayDigest;
        md5(grayBm, &grayDigest);

        for (auto alpha : { kPremul_SkAlphaType, kUnpremul_SkAlphaType }) {
            grayInfo = grayInfo.makeAlphaType(alpha);
            test_info(r, codec, grayInfo, expectedResult, &grayDigest);
        }
    }

    // Verify that re-decoding gives the same result.  It is interesting to check this after
    // a decode to 565, since choosing to decode to 565 may result in some of the decode
    // options being modified.  These options should return to their defaults on another
    // decode to kN32, so the new digest should match the old digest.
    test_info(r, codec, info, expectedResult, digest);

    {
        // Check alpha type conversions
        if (info.alphaType() == kOpaque_SkAlphaType) {
            test_info(r, codec, info.makeAlphaType(kUnpremul_SkAlphaType),
                      expectedResult, digest);
            test_info(r, codec, info.makeAlphaType(kPremul_SkAlphaType),
                      expectedResult, digest);
        } else {
            // Decoding to opaque should fail
            test_info(r, codec, info.makeAlphaType(kOpaque_SkAlphaType),
                      SkCodec::kInvalidConversion, nullptr);
            SkAlphaType otherAt = info.alphaType();
            if (kPremul_SkAlphaType == otherAt) {
                otherAt = kUnpremul_SkAlphaType;
            } else {
                otherAt = kPremul_SkAlphaType;
            }
            // The other non-opaque alpha type should always succeed, but not match.
            test_info(r, codec, info.makeAlphaType(otherAt), expectedResult, nullptr);
        }
    }
}
SkCodec::Result SkSampledCodec::onGetAndroidPixels(const SkImageInfo& info, void* pixels,
        size_t rowBytes, const AndroidOptions& options) {
    // Create an Options struct for the codec.
    SkCodec::Options codecOptions;
    codecOptions.fZeroInitialized = options.fZeroInitialized;
    codecOptions.fPremulBehavior = SkTransferFunctionBehavior::kIgnore;

    SkIRect* subset = options.fSubset;
    if (!subset || subset->size() == this->codec()->getInfo().dimensions()) {
        if (this->codec()->dimensionsSupported(info.dimensions())) {
            return this->codec()->getPixels(info, pixels, rowBytes, &codecOptions);
        }

        // If the native codec does not support the requested scale, scale by sampling.
        return this->sampledDecode(info, pixels, rowBytes, options);
    }

    // We are performing a subset decode.
    int sampleSize = options.fSampleSize;
    SkISize scaledSize = this->getSampledDimensions(sampleSize);
    if (!this->codec()->dimensionsSupported(scaledSize)) {
        // If the native codec does not support the requested scale, scale by sampling.
        return this->sampledDecode(info, pixels, rowBytes, options);
    }

    // Calculate the scaled subset bounds.
    int scaledSubsetX = subset->x() / sampleSize;
    int scaledSubsetY = subset->y() / sampleSize;
    int scaledSubsetWidth = info.width();
    int scaledSubsetHeight = info.height();

    const SkImageInfo scaledInfo = info.makeWH(scaledSize.width(), scaledSize.height());

    {
        // Although startScanlineDecode expects the bottom and top to match the
        // SkImageInfo, startIncrementalDecode uses them to determine which rows to
        // decode.
        SkIRect incrementalSubset = SkIRect::MakeXYWH(scaledSubsetX, scaledSubsetY,
                                                      scaledSubsetWidth, scaledSubsetHeight);
        codecOptions.fSubset = &incrementalSubset;
        const SkCodec::Result startResult = this->codec()->startIncrementalDecode(
                scaledInfo, pixels, rowBytes, &codecOptions);
        if (SkCodec::kSuccess == startResult) {
            int rowsDecoded;
            const SkCodec::Result incResult = this->codec()->incrementalDecode(&rowsDecoded);
            if (incResult == SkCodec::kSuccess) {
                return SkCodec::kSuccess;
            }
            SkASSERT(SkCodec::kIncompleteInput == incResult);

            // FIXME: Can zero initialized be read from SkCodec::fOptions?
            this->codec()->fillIncompleteImage(scaledInfo, pixels, rowBytes,
                    options.fZeroInitialized, scaledSubsetHeight, rowsDecoded);
            return SkCodec::kIncompleteInput;
        } else if (startResult != SkCodec::kUnimplemented) {
            return startResult;
        }
        // Otherwise fall down to use the old scanline decoder.
        // codecOptions.fSubset will be reset below, so it will not continue to
        // point to the object that is no longer on the stack.
    }

    // Start the scanline decode.
    SkIRect scanlineSubset = SkIRect::MakeXYWH(scaledSubsetX, 0, scaledSubsetWidth,
            scaledSize.height());
    codecOptions.fSubset = &scanlineSubset;

    SkCodec::Result result = this->codec()->startScanlineDecode(scaledInfo,
            &codecOptions);
    if (SkCodec::kSuccess != result) {
        return result;
    }

    // At this point, we are only concerned with subsetting.  Either no scale was
    // requested, or the this->codec() is handling the scale.
    // Note that subsetting is only supported for kTopDown, so this code will not be
    // reached for other orders.
    SkASSERT(this->codec()->getScanlineOrder() == SkCodec::kTopDown_SkScanlineOrder);
    if (!this->codec()->skipScanlines(scaledSubsetY)) {
        this->codec()->fillIncompleteImage(info, pixels, rowBytes, options.fZeroInitialized,
                scaledSubsetHeight, 0);
        return SkCodec::kIncompleteInput;
    }

    int decodedLines = this->codec()->getScanlines(pixels, scaledSubsetHeight, rowBytes);
    if (decodedLines != scaledSubsetHeight) {
        return SkCodec::kIncompleteInput;
    }
    return SkCodec::kSuccess;
}
Example #27
0
SkCodec::Result SkSampledCodec::onGetAndroidPixels(const SkImageInfo& info, void* pixels,
        size_t rowBytes, const AndroidOptions& options) {
    // Create an Options struct for the codec.
    SkCodec::Options codecOptions;
    codecOptions.fZeroInitialized = options.fZeroInitialized;

    SkIRect* subset = options.fSubset;
    if (!subset || subset->size() == this->codec()->getInfo().dimensions()) {
        if (this->codec()->dimensionsSupported(info.dimensions())) {
            return this->codec()->getPixels(info, pixels, rowBytes, &codecOptions,
                    options.fColorPtr, options.fColorCount);
        }

        // If the native codec does not support the requested scale, scale by sampling.
        return this->sampledDecode(info, pixels, rowBytes, options);
    }

    // We are performing a subset decode.
    int sampleSize = options.fSampleSize;
    SkISize scaledSize = this->getSampledDimensions(sampleSize);
    if (!this->codec()->dimensionsSupported(scaledSize)) {
        // If the native codec does not support the requested scale, scale by sampling.
        return this->sampledDecode(info, pixels, rowBytes, options);
    }

    // Calculate the scaled subset bounds.
    int scaledSubsetX = subset->x() / sampleSize;
    int scaledSubsetY = subset->y() / sampleSize;
    int scaledSubsetWidth = info.width();
    int scaledSubsetHeight = info.height();

    // Start the scanline decode.
    SkIRect scanlineSubset = SkIRect::MakeXYWH(scaledSubsetX, 0, scaledSubsetWidth,
            scaledSize.height());
    codecOptions.fSubset = &scanlineSubset;
    SkCodec::Result result = this->codec()->startScanlineDecode(info.makeWH(scaledSize.width(),
            scaledSize.height()), &codecOptions, options.fColorPtr, options.fColorCount);
    if (SkCodec::kSuccess != result) {
        return result;
    }

    // At this point, we are only concerned with subsetting.  Either no scale was
    // requested, or the this->codec() is handling the scale.
    switch (this->codec()->getScanlineOrder()) {
        case SkCodec::kTopDown_SkScanlineOrder:
        case SkCodec::kNone_SkScanlineOrder: {
            if (!this->codec()->skipScanlines(scaledSubsetY)) {
                this->codec()->fillIncompleteImage(info, pixels, rowBytes, options.fZeroInitialized,
                        scaledSubsetHeight, 0);
                return SkCodec::kIncompleteInput;
            }

            int decodedLines = this->codec()->getScanlines(pixels, scaledSubsetHeight, rowBytes);
            if (decodedLines != scaledSubsetHeight) {
                return SkCodec::kIncompleteInput;
            }
            return SkCodec::kSuccess;
        }
        default:
            SkASSERT(false);
            return SkCodec::kUnimplemented;
    }
}
Example #28
0
SkCodec::Result SkScaledCodec::onGetPixels(const SkImageInfo& requestedInfo, void* dst,
                                           size_t rowBytes, const Options& options,
                                           SkPMColor ctable[], int* ctableCount,
                                           int* rowsDecoded) {

    if (options.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }

    if (fCodec->dimensionsSupported(requestedInfo.dimensions())) {
        // Make sure that the parent class does not fill on an incomplete decode, since
        // fCodec will take care of filling the uninitialized lines.
        *rowsDecoded = requestedInfo.height();
        return fCodec->getPixels(requestedInfo, dst, rowBytes, &options, ctable, ctableCount);
    }

    // scaling requested
    int sampleX;
    int sampleY;
    if (!scaling_supported(requestedInfo.dimensions(), fCodec->getInfo().dimensions(),
                           &sampleX, &sampleY)) {
        // onDimensionsSupported would have returned false, meaning we should never reach here.
        SkASSERT(false);
        return kInvalidScale;
    }

    // set first sample pixel in y direction
    const int Y0 = get_start_coord(sampleY);

    const int dstHeight = requestedInfo.height();
    const int srcWidth = fCodec->getInfo().width();
    const int srcHeight = fCodec->getInfo().height();

    const SkImageInfo info = requestedInfo.makeWH(srcWidth, srcHeight);

    Result result = fCodec->startScanlineDecode(info, &options, ctable, ctableCount);

    if (kSuccess != result) {
        return result;
    }

    SkSampler* sampler = fCodec->getSampler(true);
    if (!sampler) {
        return kUnimplemented;
    }

    if (sampler->setSampleX(sampleX) != requestedInfo.width()) {
        return kInvalidScale;
    }

    switch(fCodec->getScanlineOrder()) {
        case SkCodec::kTopDown_SkScanlineOrder: {
            if (!fCodec->skipScanlines(Y0)) {
                *rowsDecoded = 0;
                return kIncompleteInput;
            }
            for (int y = 0; y < dstHeight; y++) {
                if (1 != fCodec->getScanlines(dst, 1, rowBytes)) {
                    // The failed call to getScanlines() will take care of
                    // filling the failed row, so we indicate that we have
                    // decoded (y + 1) rows.
                    *rowsDecoded = y + 1;
                    return kIncompleteInput;
                }
                if (y < dstHeight - 1) {
                    if (!fCodec->skipScanlines(sampleY - 1)) {
                        *rowsDecoded = y + 1;
                        return kIncompleteInput;
                    }
                }
                dst = SkTAddOffset<void>(dst, rowBytes);
            }
            return kSuccess;
        }
        case SkCodec::kBottomUp_SkScanlineOrder:
        case SkCodec::kOutOfOrder_SkScanlineOrder: {
            Result result = kSuccess;
            int y;
            for (y = 0; y < srcHeight; y++) {
                int srcY = fCodec->nextScanline();
                if (is_coord_necessary(srcY, sampleY, dstHeight)) {
                    void* dstPtr = SkTAddOffset<void>(dst, rowBytes * get_dst_coord(srcY, sampleY));
                    if (1 != fCodec->getScanlines(dstPtr, 1, rowBytes)) {
                        result = kIncompleteInput;
                        break;
                    }
                } else {
                    if (!fCodec->skipScanlines(1)) {
                        result = kIncompleteInput;
                        break;
                    }
                }
            }

            // We handle filling uninitialized memory here instead of in the parent class.
            // The parent class does not know that we are sampling.
            if (kIncompleteInput == result) {
                const uint32_t fillValue = fCodec->getFillValue(requestedInfo.colorType(),
                        requestedInfo.alphaType());
                for (; y < srcHeight; y++) {
                    int srcY = fCodec->outputScanline(y);
                    if (is_coord_necessary(srcY, sampleY, dstHeight)) {
                        void* dstRow = SkTAddOffset<void>(dst,
                                rowBytes * get_dst_coord(srcY, sampleY));
                        SkSampler::Fill(requestedInfo.makeWH(requestedInfo.width(), 1), dstRow,
                                rowBytes, fillValue, options.fZeroInitialized);
                    }
                }
                *rowsDecoded = dstHeight;
            }
            return result;
        }
        case SkCodec::kNone_SkScanlineOrder: {
            SkAutoMalloc storage(srcHeight * rowBytes);
            uint8_t* storagePtr = static_cast<uint8_t*>(storage.get());
            int scanlines = fCodec->getScanlines(storagePtr, srcHeight, rowBytes);
            storagePtr += Y0 * rowBytes;
            scanlines -= Y0;
            int y = 0;
            while (y < dstHeight && scanlines > 0) {
                memcpy(dst, storagePtr, rowBytes);
                storagePtr += sampleY * rowBytes;
                dst = SkTAddOffset<void>(dst, rowBytes);
                scanlines -= sampleY;
                y++;
            }
            if (y < dstHeight) {
                // fCodec has already handled filling uninitialized memory.
                *rowsDecoded = dstHeight;
                return kIncompleteInput;
            }
            return kSuccess;
        }
        default:
            SkASSERT(false);
            return kUnimplemented;
    }
}
Example #29
0
static void check(skiatest::Reporter* r,
                  const char path[],
                  SkISize size,
                  bool supportsScanlineDecoding,
                  bool supportsSubsetDecoding,
                  bool supports565 = true) {
    SkAutoTDelete<SkStream> stream(resource(path));
    if (!stream) {
        SkDebugf("Missing resource '%s'\n", path);
        return;
    }
    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
    if (!codec) {
        ERRORF(r, "Unable to decode '%s'", path);
        return;
    }

    // This test is used primarily to verify rewinding works properly.  Using kN32 allows
    // us to test this without the added overhead of creating different bitmaps depending
    // on the color type (ex: building a color table for kIndex8).  DM is where we test
    // decodes to all possible destination color types.
    SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
    REPORTER_ASSERT(r, info.dimensions() == size);

    {
        // Test decoding to 565
        SkImageInfo info565 = info.makeColorType(kRGB_565_SkColorType);
        SkCodec::Result expected = (supports565 && info.alphaType() == kOpaque_SkAlphaType) ?
                SkCodec::kSuccess : SkCodec::kInvalidConversion;
        test_info(r, codec, info565, expected, NULL);
    }

    SkBitmap bm;
    bm.allocPixels(info);
    SkAutoLockPixels autoLockPixels(bm);
    SkCodec::Result result =
        codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
    REPORTER_ASSERT(r, result == SkCodec::kSuccess);

    SkMD5::Digest digest;
    md5(bm, &digest);

    // verify that re-decoding gives the same result.
    test_info(r, codec, info, SkCodec::kSuccess, &digest);

    {
        // Check alpha type conversions
        if (info.alphaType() == kOpaque_SkAlphaType) {
            test_info(r, codec, info.makeAlphaType(kUnpremul_SkAlphaType),
                      SkCodec::kInvalidConversion, NULL);
            test_info(r, codec, info.makeAlphaType(kPremul_SkAlphaType),
                      SkCodec::kInvalidConversion, NULL);
        } else {
            // Decoding to opaque should fail
            test_info(r, codec, info.makeAlphaType(kOpaque_SkAlphaType),
                      SkCodec::kInvalidConversion, NULL);
            SkAlphaType otherAt = info.alphaType();
            if (kPremul_SkAlphaType == otherAt) {
                otherAt = kUnpremul_SkAlphaType;
            } else {
                otherAt = kPremul_SkAlphaType;
            }
            // The other non-opaque alpha type should always succeed, but not match.
            test_info(r, codec, info.makeAlphaType(otherAt), SkCodec::kSuccess, NULL);
        }
    }

    // Scanline decoding follows.

    stream.reset(resource(path));
    SkAutoTDelete<SkScanlineDecoder> scanlineDecoder(
            SkScanlineDecoder::NewFromStream(stream.detach()));
    if (supportsScanlineDecoding) {
        bm.eraseColor(SK_ColorYELLOW);
        REPORTER_ASSERT(r, scanlineDecoder);

        REPORTER_ASSERT(r, scanlineDecoder->start(info) == SkCodec::kSuccess);

        for (int y = 0; y < info.height(); y++) {
            result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0);
            REPORTER_ASSERT(r, result == SkCodec::kSuccess);
        }
        // verify that scanline decoding gives the same result.
        compare_to_good_digest(r, digest, bm);
    } else {
        REPORTER_ASSERT(r, !scanlineDecoder);
    }

    // The rest of this function tests decoding subsets, and will decode an arbitrary number of
    // random subsets.
    // Do not attempt to decode subsets of an image of only once pixel, since there is no
    // meaningful subset.
    if (size.width() * size.height() == 1) {
        return;
    }

    SkRandom rand;
    SkIRect subset;
    SkCodec::Options opts;
    opts.fSubset = &subset;
    for (int i = 0; i < 5; i++) {
        subset = generate_random_subset(&rand, size.width(), size.height());
        SkASSERT(!subset.isEmpty());
        const bool supported = codec->getValidSubset(&subset);
        REPORTER_ASSERT(r, supported == supportsSubsetDecoding);

        SkImageInfo subsetInfo = info.makeWH(subset.width(), subset.height());
        SkBitmap bm;
        bm.allocPixels(subsetInfo);
        const SkCodec::Result result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes(),
                                                        &opts, NULL, NULL);

        if (supportsSubsetDecoding) {
            REPORTER_ASSERT(r, result == SkCodec::kSuccess);
            // Webp is the only codec that supports subsets, and it will have modified the subset
            // to have even left/top.
            REPORTER_ASSERT(r, SkIsAlign2(subset.fLeft) && SkIsAlign2(subset.fTop));
        } else {
            // No subsets will work.
            REPORTER_ASSERT(r, result == SkCodec::kUnimplemented);
        }
    }
}