コード例 #1
0
ファイル: CodexTest.cpp プロジェクト: huqingyu/skia
static void check(skiatest::Reporter* r,
                  const char path[],
                  SkISize size,
                  bool supportsScanlineDecoding,
                  bool supportsSubsetDecoding) {
    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);
    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);

    bm.eraseColor(SK_ColorYELLOW);

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

    REPORTER_ASSERT(r, result == SkCodec::kSuccess);
    // verify that re-decoding gives the same result.
    compare_to_good_digest(r, digest, bm);

    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);
        }
    }
}
コード例 #2
0
ファイル: SerializationTest.cpp プロジェクト: Just-D/skia
DEF_TEST(Serialization, reporter) {
    // Test matrix serialization
    {
        SkMatrix matrix = SkMatrix::I();
        TestObjectSerialization(&matrix, reporter);
    }

    // Test path serialization
    {
        SkPath path;
        TestObjectSerialization(&path, reporter);
    }

    // Test region serialization
    {
        SkRegion region;
        TestObjectSerialization(&region, reporter);
    }

    // Test xfermode serialization
    {
        TestXfermodeSerialization(reporter);
    }

    // Test color filter serialization
    {
        TestColorFilterSerialization(reporter);
    }

    // Test string serialization
    {
        SkString string("string");
        TestObjectSerializationNoAlign<SkString, false>(&string, reporter);
        TestObjectSerializationNoAlign<SkString, true>(&string, reporter);
    }

    // Test rrect serialization
    {
        // SkRRect does not initialize anything.
        // An uninitialized SkRRect can be serialized,
        // but will branch on uninitialized data when deserialized.
        SkRRect rrect;
        SkRect rect = SkRect::MakeXYWH(1, 2, 20, 30);
        SkVector corners[4] = { {1, 2}, {2, 3}, {3,4}, {4,5} };
        rrect.setRectRadii(rect, corners);
        TestAlignment(&rrect, reporter);
    }

    // Test readByteArray
    {
        unsigned char data[kArraySize] = { 1, 2, 3 };
        TestArraySerialization(data, reporter);
    }

    // Test readColorArray
    {
        SkColor data[kArraySize] = { SK_ColorBLACK, SK_ColorWHITE, SK_ColorRED };
        TestArraySerialization(data, reporter);
    }

    // Test readIntArray
    {
        int32_t data[kArraySize] = { 1, 2, 4, 8 };
        TestArraySerialization(data, reporter);
    }

    // Test readPointArray
    {
        SkPoint data[kArraySize] = { {6, 7}, {42, 128} };
        TestArraySerialization(data, reporter);
    }

    // Test readScalarArray
    {
        SkScalar data[kArraySize] = { SK_Scalar1, SK_ScalarHalf, SK_ScalarMax };
        TestArraySerialization(data, reporter);
    }

    // Test invalid deserializations
    {
        SkImageInfo info = SkImageInfo::MakeN32Premul(kBitmapSize, kBitmapSize);

        SkBitmap validBitmap;
        validBitmap.setInfo(info);

        // Create a bitmap with a really large height
        SkBitmap invalidBitmap;
        invalidBitmap.setInfo(info.makeWH(info.width(), 1000000000));

        // The deserialization should succeed, and the rendering shouldn't crash,
        // even when the device fails to initialize, due to its size
        TestBitmapSerialization(validBitmap, invalidBitmap, true, reporter);
    }

    // Test simple SkPicture serialization
    {
        SkPictureRecorder recorder;
        draw_something(recorder.beginRecording(SkIntToScalar(kBitmapSize),
                                               SkIntToScalar(kBitmapSize),
                                               nullptr, 0));
        SkAutoTUnref<SkPicture> pict(recorder.endRecording());

        // Serialize picture
        SkWriteBuffer writer(SkWriteBuffer::kValidation_Flag);
        pict->flatten(writer);
        size_t size = writer.bytesWritten();
        SkAutoTMalloc<unsigned char> data(size);
        writer.writeToMemory(static_cast<void*>(data.get()));

        // Deserialize picture
        SkValidatingReadBuffer reader(static_cast<void*>(data.get()), size);
        SkAutoTUnref<SkPicture> readPict(
            SkPicture::CreateFromBuffer(reader));
        REPORTER_ASSERT(reporter, readPict.get());
    }

    TestPictureTypefaceSerialization(reporter);
}
コード例 #3
0
GrPixelConfig SkImageInfo2GrPixelConfig(const SkImageInfo& info, const GrCaps& caps) {
    return SkImageInfo2GrPixelConfig(info.colorType(), info.colorSpace(), caps);
}
コード例 #4
0
ファイル: SkCodec.cpp プロジェクト: keinvo/keinvo.github.io
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;
    }

    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;
}
コード例 #5
0
static SkImageInfo validate_info(const SkImageInfo& info) {
    SkAlphaType newAlphaType = info.alphaType();
    SkAssertResult(SkColorTypeValidateAlphaType(info.colorType(), info.alphaType(), &newAlphaType));
    return info.makeAlphaType(newAlphaType);
}
コード例 #6
0
size_t SkImage::getDeferredTextureImageData(const GrContextThreadSafeProxy& proxy,
                                            const DeferredTextureImageUsageParams params[],
                                            int paramCnt, void* buffer,
                                            SkColorSpace* dstColorSpace) const {
    // Extract relevant min/max values from the params array.
    int lowestPreScaleMipLevel = params[0].fPreScaleMipLevel;
    SkFilterQuality highestFilterQuality = params[0].fQuality;
    bool useMipMaps = should_use_mip_maps(params[0]);
    for (int i = 1; i < paramCnt; ++i) {
        if (lowestPreScaleMipLevel > params[i].fPreScaleMipLevel)
            lowestPreScaleMipLevel = params[i].fPreScaleMipLevel;
        if (highestFilterQuality < params[i].fQuality)
            highestFilterQuality = params[i].fQuality;
        useMipMaps |= should_use_mip_maps(params[i]);
    }

    const bool fillMode = SkToBool(buffer);
    if (fillMode && !SkIsAlign8(reinterpret_cast<intptr_t>(buffer))) {
        return 0;
    }

    // Calculate scaling parameters.
    bool isScaled = lowestPreScaleMipLevel != 0;

    SkISize scaledSize;
    if (isScaled) {
        // SkMipMap::ComputeLevelSize takes an index into an SkMipMap. SkMipMaps don't contain the
        // base level, so to get an SkMipMap index we must subtract one from the GL MipMap level.
        scaledSize = SkMipMap::ComputeLevelSize(this->width(), this->height(),
                                                lowestPreScaleMipLevel - 1);
    } else {
        scaledSize = SkISize::Make(this->width(), this->height());
    }

    // We never want to scale at higher than SW medium quality, as SW medium matches GPU high.
    SkFilterQuality scaleFilterQuality = highestFilterQuality;
    if (scaleFilterQuality > kMedium_SkFilterQuality) {
        scaleFilterQuality = kMedium_SkFilterQuality;
    }

    const int maxTextureSize = proxy.fCaps->maxTextureSize();
    if (scaledSize.width() > maxTextureSize || scaledSize.height() > maxTextureSize) {
        return 0;
    }

    SkAutoPixmapStorage pixmap;
    SkImageInfo info;
    size_t pixelSize = 0;
    if (!isScaled && this->peekPixels(&pixmap) && !pixmap.ctable()) {
        info = pixmap.info();
        pixelSize = SkAlign8(pixmap.getSafeSize());
    } else {
        // Here we're just using presence of data to know whether there is a codec behind the image.
        // In the future we will access the cacherator and get the exact data that we want to (e.g.
        // yuv planes) upload.
        sk_sp<SkData> data(this->refEncoded());
        if (!data && !this->peekPixels(nullptr)) {
            return 0;
        }
        if (SkImageCacherator* cacher = as_IB(this)->peekCacherator()) {
            // Generator backed image. Tweak info to trigger correct kind of decode.
            SkImageCacherator::CachedFormat cacheFormat = cacher->chooseCacheFormat(
                dstColorSpace, proxy.fCaps.get());
            info = cacher->buildCacheInfo(cacheFormat).makeWH(scaledSize.width(),
                                                              scaledSize.height());
        } else {
            info = as_IB(this)->onImageInfo().makeWH(scaledSize.width(), scaledSize.height());
        }
        if (kIndex_8_SkColorType == info.colorType()) {
            // Force Index8 to be N32 instead. Index8 is unsupported in Ganesh.
            info = info.makeColorType(kN32_SkColorType);
        }
        pixelSize = SkAlign8(SkAutoPixmapStorage::AllocSize(info, nullptr));
        if (fillMode) {
            pixmap.alloc(info);
            if (isScaled) {
                if (!this->scalePixels(pixmap, scaleFilterQuality,
                                       SkImage::kDisallow_CachingHint)) {
                    return 0;
                }
            } else {
                if (!this->readPixels(pixmap, 0, 0, SkImage::kDisallow_CachingHint)) {
                    return 0;
                }
            }
            SkASSERT(!pixmap.ctable());
        }
    }
    int mipMapLevelCount = 1;
    if (useMipMaps) {
        // SkMipMap only deals with the mipmap levels it generates, which does
        // not include the base level.
        // That means it generates and holds levels 1-x instead of 0-x.
        // So the total mipmap level count is 1 more than what
        // SkMipMap::ComputeLevelCount returns.
        mipMapLevelCount = SkMipMap::ComputeLevelCount(scaledSize.width(), scaledSize.height()) + 1;

        // We already initialized pixelSize to the size of the base level.
        // SkMipMap will generate the extra mipmap levels. Their sizes need to
        // be added to the total.
        // Index 0 here does not refer to the base mipmap level -- it is
        // SkMipMap's first generated mipmap level (level 1).
        for (int currentMipMapLevelIndex = mipMapLevelCount - 2; currentMipMapLevelIndex >= 0;
             currentMipMapLevelIndex--) {
            SkISize mipSize = SkMipMap::ComputeLevelSize(scaledSize.width(), scaledSize.height(),
                                                         currentMipMapLevelIndex);
            SkImageInfo mipInfo = info.makeWH(mipSize.fWidth, mipSize.fHeight);
            pixelSize += SkAlign8(SkAutoPixmapStorage::AllocSize(mipInfo, nullptr));
        }
    }
    size_t size = 0;
    size_t dtiSize = SkAlign8(sizeof(DeferredTextureImage));
    size += dtiSize;
    size += (mipMapLevelCount - 1) * sizeof(MipMapLevelData);
    // We subtract 1 because DeferredTextureImage already includes the base
    // level in its size
    size_t pixelOffset = size;
    size += pixelSize;
    size_t colorSpaceOffset = 0;
    size_t colorSpaceSize = 0;
    SkColorSpaceTransferFn fn;
    if (info.colorSpace()) {
        colorSpaceOffset = size;
        colorSpaceSize = info.colorSpace()->writeToMemory(nullptr);
        size += colorSpaceSize;
    } else if (this->colorSpace() && this->colorSpace()->isNumericalTransferFn(&fn)) {
        // In legacy mode, preserve the color space tag on the SkImage.  This is only
        // supported if the color space has a parametric transfer function.
        SkASSERT(!dstColorSpace);
        colorSpaceOffset = size;
        colorSpaceSize = this->colorSpace()->writeToMemory(nullptr);
        size += colorSpaceSize;
    }
    if (!fillMode) {
        return size;
    }
    char* bufferAsCharPtr = reinterpret_cast<char*>(buffer);
    char* pixelsAsCharPtr = bufferAsCharPtr + pixelOffset;
    void* pixels = pixelsAsCharPtr;

    memcpy(reinterpret_cast<void*>(SkAlign8(reinterpret_cast<uintptr_t>(pixelsAsCharPtr))),
                                   pixmap.addr(), pixmap.getSafeSize());

    // If the context has sRGB support, and we're intending to render to a surface with an attached
    // color space, and the image has an sRGB-like color space attached, then use our gamma (sRGB)
    // aware mip-mapping.
    SkDestinationSurfaceColorMode colorMode = SkDestinationSurfaceColorMode::kLegacy;
    if (proxy.fCaps->srgbSupport() && SkToBool(dstColorSpace) &&
        info.colorSpace() && info.colorSpace()->gammaCloseToSRGB()) {
        colorMode = SkDestinationSurfaceColorMode::kGammaAndColorSpaceAware;
    }

    SkASSERT(info == pixmap.info());
    size_t rowBytes = pixmap.rowBytes();
    static_assert(std::is_standard_layout<DeferredTextureImage>::value,
                  "offsetof, which we use below, requires the type have standard layout");
    auto dtiBufferFiller = DTIBufferFiller{bufferAsCharPtr};
    FILL_MEMBER(dtiBufferFiller, fColorMode, &colorMode);
    FILL_MEMBER(dtiBufferFiller, fContextUniqueID, &proxy.fContextUniqueID);
    int width = info.width();
    FILL_MEMBER(dtiBufferFiller, fWidth, &width);
    int height = info.height();
    FILL_MEMBER(dtiBufferFiller, fHeight, &height);
    SkColorType colorType = info.colorType();
    FILL_MEMBER(dtiBufferFiller, fColorType, &colorType);
    SkAlphaType alphaType = info.alphaType();
    FILL_MEMBER(dtiBufferFiller, fAlphaType, &alphaType);
    FILL_MEMBER(dtiBufferFiller, fMipMapLevelCount, &mipMapLevelCount);
    memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData[0].fPixelData),
           &pixels, sizeof(pixels));
    memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData[0].fRowBytes),
           &rowBytes, sizeof(rowBytes));
    if (colorSpaceSize) {
        void* colorSpace = bufferAsCharPtr + colorSpaceOffset;
        FILL_MEMBER(dtiBufferFiller, fColorSpace, &colorSpace);
        FILL_MEMBER(dtiBufferFiller, fColorSpaceSize, &colorSpaceSize);
        if (info.colorSpace()) {
            info.colorSpace()->writeToMemory(bufferAsCharPtr + colorSpaceOffset);
        } else {
            SkASSERT(this->colorSpace() && this->colorSpace()->isNumericalTransferFn(&fn));
            SkASSERT(!dstColorSpace);
            this->colorSpace()->writeToMemory(bufferAsCharPtr + colorSpaceOffset);
        }
    } else {
        memset(bufferAsCharPtr + offsetof(DeferredTextureImage, fColorSpace),
               0, sizeof(DeferredTextureImage::fColorSpace));
        memset(bufferAsCharPtr + offsetof(DeferredTextureImage, fColorSpaceSize),
               0, sizeof(DeferredTextureImage::fColorSpaceSize));
    }

    // Fill in the mipmap levels if they exist
    char* mipLevelPtr = pixelsAsCharPtr + SkAlign8(pixmap.getSafeSize());

    if (useMipMaps) {
        static_assert(std::is_standard_layout<MipMapLevelData>::value,
                      "offsetof, which we use below, requires the type have a standard layout");

        std::unique_ptr<SkMipMap> mipmaps(SkMipMap::Build(pixmap, colorMode, nullptr));
        // SkMipMap holds only the mipmap levels it generates.
        // A programmer can use the data they provided to SkMipMap::Build as level 0.
        // So the SkMipMap provides levels 1-x but it stores them in its own
        // range 0-(x-1).
        for (int generatedMipLevelIndex = 0; generatedMipLevelIndex < mipMapLevelCount - 1;
             generatedMipLevelIndex++) {
            SkMipMap::Level mipLevel;
            mipmaps->getLevel(generatedMipLevelIndex, &mipLevel);

            // Make sure the mipmap data is after the start of the buffer
            SkASSERT(mipLevelPtr > bufferAsCharPtr);
            // Make sure the mipmap data starts before the end of the buffer
            SkASSERT(mipLevelPtr < bufferAsCharPtr + pixelOffset + pixelSize);
            // Make sure the mipmap data ends before the end of the buffer
            SkASSERT(mipLevelPtr + mipLevel.fPixmap.getSafeSize() <=
                     bufferAsCharPtr + pixelOffset + pixelSize);

            // getSafeSize includes rowbyte padding except for the last row,
            // right?

            memcpy(mipLevelPtr, mipLevel.fPixmap.addr(), mipLevel.fPixmap.getSafeSize());

            memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData) +
                   sizeof(MipMapLevelData) * (generatedMipLevelIndex + 1) +
                   offsetof(MipMapLevelData, fPixelData), &mipLevelPtr, sizeof(void*));
            size_t rowBytes = mipLevel.fPixmap.rowBytes();
            memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData) +
                   sizeof(MipMapLevelData) * (generatedMipLevelIndex + 1) +
                   offsetof(MipMapLevelData, fRowBytes), &rowBytes, sizeof(rowBytes));

            mipLevelPtr += SkAlign8(mipLevel.fPixmap.getSafeSize());
        }
    }
    return size;
}
コード例 #7
0
ファイル: SkJpegCodec.cpp プロジェクト: OwenTan/skia
/*
 * Performs the jpeg decode
 */
SkCodec::Result SkJpegCodec::onGetPixels(const SkImageInfo& dstInfo,
                                         void* dst, size_t dstRowBytes,
                                         const Options& options, SkPMColor*, int*,
                                         int* rowsDecoded) {
    if (options.fSubset) {
        // Subsets are not supported.
        return kUnimplemented;
    }

    // Get a pointer to the decompress info since we will use it quite frequently
    jpeg_decompress_struct* dinfo = fDecoderMgr->dinfo();

    // Set the jump location for libjpeg errors
    if (setjmp(fDecoderMgr->getJmpBuf())) {
        return fDecoderMgr->returnFailure("setjmp", kInvalidInput);
    }

    // Check if we can decode to the requested destination and set the output color space
    if (!this->setOutputColorSpace(dstInfo)) {
        return fDecoderMgr->returnFailure("conversion_possible", kInvalidConversion);
    }

    // Now, given valid output dimensions, we can start the decompress
    if (!jpeg_start_decompress(dinfo)) {
        return fDecoderMgr->returnFailure("startDecompress", kInvalidInput);
    }

    // The recommended output buffer height should always be 1 in high quality modes.
    // If it's not, we want to know because it means our strategy is not optimal.
    SkASSERT(1 == dinfo->rec_outbuf_height);

    J_COLOR_SPACE colorSpace = dinfo->out_color_space;
    if (JCS_CMYK == colorSpace || JCS_RGB == colorSpace) {
        this->initializeSwizzler(dstInfo, options);
    }

    // Perform the decode a single row at a time
    uint32_t dstHeight = dstInfo.height();

    JSAMPLE* dstRow;
    if (fSwizzler) {
        // write data to storage row, then sample using swizzler
        dstRow = fSrcRow;
    } else {
        // write data directly to dst
        dstRow = (JSAMPLE*) dst;
    }

    for (uint32_t y = 0; y < dstHeight; y++) {
        // Read rows of the image
        uint32_t lines = jpeg_read_scanlines(dinfo, &dstRow, 1);
        sk_msan_mark_initialized(dstRow, dstRow + dstRowBytes, "skbug.com/4550");

        // If we cannot read enough rows, assume the input is incomplete
        if (lines != 1) {
            *rowsDecoded = y;

            return fDecoderMgr->returnFailure("Incomplete image data", kIncompleteInput);
        }

        if (fSwizzler) {
            // use swizzler to sample row
            fSwizzler->swizzle(dst, dstRow);
            dst = SkTAddOffset<JSAMPLE>(dst, dstRowBytes);
        } else {
            dstRow = SkTAddOffset<JSAMPLE>(dstRow, dstRowBytes);
        }
    }

    return kSuccess;
}
コード例 #8
0
static transform_scanline_proc choose_proc(const SkImageInfo& info) {
    switch (info.colorType()) {
        case kRGBA_8888_SkColorType:
            switch (info.alphaType()) {
                case kOpaque_SkAlphaType:
                    return transform_scanline_RGBX;
                case kUnpremul_SkAlphaType:
                    return transform_scanline_memcpy;
                case kPremul_SkAlphaType:
                    return transform_scanline_rgbA;
                default:
                    SkASSERT(false);
                    return nullptr;
            }
        case kBGRA_8888_SkColorType:
            switch (info.alphaType()) {
                case kOpaque_SkAlphaType:
                    return transform_scanline_BGRX;
                case kUnpremul_SkAlphaType:
                    return transform_scanline_BGRA;
                case kPremul_SkAlphaType:
                    return transform_scanline_bgrA;
                default:
                    SkASSERT(false);
                    return nullptr;
            }
        case kRGB_565_SkColorType:
            return transform_scanline_565;
        case kRGB_888x_SkColorType:
            return transform_scanline_888x;
        case kARGB_4444_SkColorType:
            switch (info.alphaType()) {
                case kOpaque_SkAlphaType:
                    return transform_scanline_444;
                case kPremul_SkAlphaType:
                    // 4444 is assumed to be legacy premul.
                    return transform_scanline_4444;
                default:
                    SkASSERT(false);
                    return nullptr;
            }
        case kGray_8_SkColorType:
            return transform_scanline_memcpy;
        case kRGBA_F16_SkColorType:
            switch (info.alphaType()) {
                case kOpaque_SkAlphaType:
                case kUnpremul_SkAlphaType:
                    return transform_scanline_F16;
                case kPremul_SkAlphaType:
                    return transform_scanline_F16_premul;
                default:
                    SkASSERT(false);
                    return nullptr;
            }
        case kRGBA_F32_SkColorType:
            switch (info.alphaType()) {
                case kOpaque_SkAlphaType:
                case kUnpremul_SkAlphaType:
                    return transform_scanline_F32;
                case kPremul_SkAlphaType:
                    return transform_scanline_F32_premul;
                default:
                    SkASSERT(false);
                    return nullptr;
            }
        case kRGBA_1010102_SkColorType:
            switch (info.alphaType()) {
                case kOpaque_SkAlphaType:
                case kUnpremul_SkAlphaType:
                    return transform_scanline_1010102;
                case kPremul_SkAlphaType:
                    return transform_scanline_1010102_premul;
                default:
                    SkASSERT(false);
                    return nullptr;
            }
        case kRGB_101010x_SkColorType:
            return transform_scanline_101010x;
        case kAlpha_8_SkColorType:
            return transform_scanline_A8_to_GrayAlpha;
        default:
            SkASSERT(false);
            return nullptr;
    }
}
コード例 #9
0
void SubsetTranslateBench::onDraw(const int n, SkCanvas* canvas) {
    // When the color type is kIndex8, we will need to store the color table.  If it is
    // used, it will be initialized by the codec.
    int colorCount;
    SkPMColor colors[256];
    if (fUseCodec) {
        for (int count = 0; count < n; count++) {
            SkAutoTDelete<SkScanlineDecoder> scanlineDecoder(
                    SkScanlineDecoder::NewFromStream(fStream->duplicate()));
            const SkImageInfo info = scanlineDecoder->getInfo().makeColorType(fColorType);
            SkAutoTDeleteArray<uint8_t> row(new uint8_t[info.minRowBytes()]);
            scanlineDecoder->start(info, NULL, colors, &colorCount);

            SkBitmap bitmap;
            // Note that we use the same bitmap for all of the subsets.
            // It might be larger than necessary for the end subsets.
            SkImageInfo subsetInfo = info.makeWH(fSubsetWidth, fSubsetHeight);
            alloc_pixels(&bitmap, subsetInfo, colors, colorCount);

            for (int x = 0; x < info.width(); x += fSubsetWidth) {
                for (int y = 0; y < info.height(); y += fSubsetHeight) {
                    scanlineDecoder->skipScanlines(y);
                    const uint32_t currSubsetWidth =
                            x + (int) fSubsetWidth > info.width() ?
                            info.width() - x : fSubsetWidth;
                    const uint32_t currSubsetHeight =
                            y + (int) fSubsetHeight > info.height() ?
                            info.height() - y : fSubsetHeight;
                    const uint32_t bpp = info.bytesPerPixel();
                    for (uint32_t y = 0; y < currSubsetHeight; y++) {
                        scanlineDecoder->getScanlines(row.get(), 1, 0);
                        memcpy(bitmap.getAddr(0, y), row.get() + x * bpp,
                                currSubsetWidth * bpp);
                    }
                }
            }
        }
    } else {
        // We create a color table here to satisfy allocPixels() when the output
        // type is kIndex8.  It's okay that this is uninitialized since we never
        // use it.
        SkColorTable* colorTable = new SkColorTable(colors, 0);
        for (int count = 0; count < n; count++) {
            int width, height;
            SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(fStream));
            decoder->buildTileIndex(fStream->duplicate(), &width, &height);
            SkBitmap bitmap;
            // Note that we use the same bitmap for all of the subsets.
            // It might be larger than necessary for the end subsets.
            // If we do not include this step, decodeSubset() would allocate space
            // for the pixels automatically, but this would not allow us to reuse the
            // same bitmap as the other subsets.  We want to reuse the same bitmap
            // because it gives a more fair comparison with SkCodec and is a common
            // use case of BitmapRegionDecoder.
            bitmap.allocPixels(SkImageInfo::Make(fSubsetWidth, fSubsetHeight,
                    fColorType, kOpaque_SkAlphaType), NULL, colorTable);

            for (int x = 0; x < width; x += fSubsetWidth) {
                for (int y = 0; y < height; y += fSubsetHeight) {
                    const uint32_t currSubsetWidth = x + (int) fSubsetWidth > width ?
                            width - x : fSubsetWidth;
                    const uint32_t currSubsetHeight = y + (int) fSubsetHeight > height ?
                            height - y : fSubsetHeight;
                    SkIRect rect = SkIRect::MakeXYWH(x, y, currSubsetWidth,
                            currSubsetHeight);
                    decoder->decodeSubset(&bitmap, rect, fColorType);
                }
            }
        }
    }
}
コード例 #10
0
ファイル: SkJpegCodec.cpp プロジェクト: OwenTan/skia
/*
 * Checks if the conversion between the input image and the requested output
 * image has been implemented
 * Sets the output color space
 */
bool SkJpegCodec::setOutputColorSpace(const SkImageInfo& dst) {
    if (kUnknown_SkAlphaType == dst.alphaType()) {
        return false;
    }

    if (kOpaque_SkAlphaType != dst.alphaType()) {
        SkCodecPrintf("Warning: an opaque image should be decoded as opaque "
                      "- it is being decoded as non-opaque, which will draw slower\n");
    }

    // Check if we will decode to CMYK because a conversion to RGBA is not supported
    J_COLOR_SPACE colorSpace = fDecoderMgr->dinfo()->jpeg_color_space;
    bool isCMYK = JCS_CMYK == colorSpace || JCS_YCCK == colorSpace;

    // Check for valid color types and set the output color space
    switch (dst.colorType()) {
        case kRGBA_8888_SkColorType:
            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else {
#ifdef LIBJPEG_TURBO_VERSION
            fDecoderMgr->dinfo()->out_color_space = JCS_EXT_RGBA;
#else
            fDecoderMgr->dinfo()->out_color_space = JCS_RGB;
#endif
            }
            return true;
        case kBGRA_8888_SkColorType:
            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else {
#ifdef LIBJPEG_TURBO_VERSION
            fDecoderMgr->dinfo()->out_color_space = JCS_EXT_BGRA;
#else
            fDecoderMgr->dinfo()->out_color_space = JCS_RGB;
#endif
            }
            return true;
        case kRGB_565_SkColorType:
            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else {
#ifdef TURBO_HAS_565
                fDecoderMgr->dinfo()->dither_mode = JDITHER_NONE;
                fDecoderMgr->dinfo()->out_color_space = JCS_RGB565;
#else
                fDecoderMgr->dinfo()->out_color_space = JCS_RGB;
#endif
            }
            return true;
        case kGray_8_SkColorType:
            if (isCMYK) {
                return false;
            } else {
                // We will enable decodes to gray even if the image is color because this is
                // much faster than decoding to color and then converting
                fDecoderMgr->dinfo()->out_color_space = JCS_GRAYSCALE;
            }
            return true;
        default:
            return false;
    }
}
コード例 #11
0
ファイル: SerializationTest.cpp プロジェクト: ROM-PacMe/skia
DEF_TEST(Serialization, reporter) {
    // Test matrix serialization
    {
        SkMatrix matrix = SkMatrix::I();
        TestObjectSerialization(&matrix, reporter);
    }

    // Test path serialization
    {
        SkPath path;
        TestObjectSerialization(&path, reporter);
    }

    // Test region serialization
    {
        SkRegion region;
        TestObjectSerialization(&region, reporter);
    }

    // Test xfermode serialization
    {
        TestXfermodeSerialization(reporter);
    }

    // Test color filter serialization
    {
        TestColorFilterSerialization(reporter);
    }

    // Test string serialization
    {
        SkString string("string");
        TestObjectSerializationNoAlign<SkString, false>(&string, reporter);
        TestObjectSerializationNoAlign<SkString, true>(&string, reporter);
    }

    // Test rrect serialization
    {
        // SkRRect does not initialize anything.
        // An uninitialized SkRRect can be serialized,
        // but will branch on uninitialized data when deserialized.
        SkRRect rrect;
        SkRect rect = SkRect::MakeXYWH(1, 2, 20, 30);
        SkVector corners[4] = { {1, 2}, {2, 3}, {3,4}, {4,5} };
        rrect.setRectRadii(rect, corners);
        TestAlignment(&rrect, reporter);
    }

    // Test readByteArray
    {
        unsigned char data[kArraySize] = { 1, 2, 3 };
        TestArraySerialization(data, reporter);
    }

    // Test readColorArray
    {
        SkColor data[kArraySize] = { SK_ColorBLACK, SK_ColorWHITE, SK_ColorRED };
        TestArraySerialization(data, reporter);
    }

    // Test readIntArray
    {
        int32_t data[kArraySize] = { 1, 2, 4, 8 };
        TestArraySerialization(data, reporter);
    }

    // Test readPointArray
    {
        SkPoint data[kArraySize] = { {6, 7}, {42, 128} };
        TestArraySerialization(data, reporter);
    }

    // Test readScalarArray
    {
        SkScalar data[kArraySize] = { SK_Scalar1, SK_ScalarHalf, SK_ScalarMax };
        TestArraySerialization(data, reporter);
    }

    // Test invalid deserializations
    {
        SkImageInfo info = SkImageInfo::MakeN32Premul(kBitmapSize, kBitmapSize);

        SkBitmap validBitmap;
        validBitmap.setInfo(info);

        // Create a bitmap with a really large height
        SkBitmap invalidBitmap;
        invalidBitmap.setInfo(info.makeWH(info.width(), 1000000000));

        // The deserialization should succeed, and the rendering shouldn't crash,
        // even when the device fails to initialize, due to its size
        TestBitmapSerialization(validBitmap, invalidBitmap, true, reporter);
    }

    // Test simple SkPicture serialization
    {
        SkPictureRecorder recorder;
        draw_something(recorder.beginRecording(SkIntToScalar(kBitmapSize),
                                               SkIntToScalar(kBitmapSize),
                                               nullptr, 0));
        sk_sp<SkPicture> pict(recorder.finishRecordingAsPicture());

        // Serialize picture
        SkBinaryWriteBuffer writer;
        pict->flatten(writer);
        size_t size = writer.bytesWritten();
        SkAutoTMalloc<unsigned char> data(size);
        writer.writeToMemory(static_cast<void*>(data.get()));

        // Deserialize picture
        SkValidatingReadBuffer reader(static_cast<void*>(data.get()), size);
        sk_sp<SkPicture> readPict(SkPicture::MakeFromBuffer(reader));
        REPORTER_ASSERT(reporter, readPict.get());
    }

    TestPictureTypefaceSerialization(reporter);

    // Test SkLightingShader/NormalMapSource serialization
    {
        const int kTexSize = 2;

        SkLights::Builder builder;

        builder.add(SkLights::Light(SkColor3f::Make(1.0f, 1.0f, 1.0f),
                                    SkVector3::Make(1.0f, 0.0f, 0.0f)));
        builder.add(SkLights::Light(SkColor3f::Make(0.2f, 0.2f, 0.2f)));

        sk_sp<SkLights> fLights = builder.finish();

        SkBitmap diffuse = sk_tool_utils::create_checkerboard_bitmap(
                kTexSize, kTexSize,
                sk_tool_utils::color_to_565(0x0),
                sk_tool_utils::color_to_565(0xFF804020),
                8);

        SkRect bitmapBounds = SkRect::MakeIWH(diffuse.width(), diffuse.height());

        SkMatrix matrix;
        SkRect r = SkRect::MakeWH(SkIntToScalar(kTexSize), SkIntToScalar(kTexSize));
        matrix.setRectToRect(bitmapBounds, r, SkMatrix::kFill_ScaleToFit);

        SkMatrix ctm;
        ctm.setRotate(45);
        SkBitmap normals;
        normals.allocN32Pixels(kTexSize, kTexSize);

        sk_tool_utils::create_frustum_normal_map(&normals, SkIRect::MakeWH(kTexSize, kTexSize));
        sk_sp<SkShader> normalMap = SkMakeBitmapShader(normals, SkShader::kClamp_TileMode,
                                                       SkShader::kClamp_TileMode, &matrix, nullptr);
        sk_sp<SkNormalSource> normalSource = SkNormalSource::MakeFromNormalMap(std::move(normalMap),
                                                                               ctm);
        sk_sp<SkShader> lightingShader = SkLightingShader::Make(diffuse, fLights, &matrix,
                                                                std::move(normalSource));

        SkAutoTUnref<SkShader>(TestFlattenableSerialization(lightingShader.get(), true, reporter));
        // TODO test equality?

    }
}
コード例 #12
0
ファイル: bleed.cpp プロジェクト: BertiKarsunke/skia
bool make_ringed_bitmap(GrContext*, TestPixels* result, int width, int height,
                        SkColorType ct, SkAlphaType at,
                        PIXEL_TYPE outerRingColor, PIXEL_TYPE innerRingColor,
                        PIXEL_TYPE checkColor1, PIXEL_TYPE checkColor2) {
    SkASSERT(0 == width % 2 && 0 == height % 2);
    SkASSERT(width >= 6 && height >= 6);

    result->fType = TestPixels::kBitmap;
    SkImageInfo info = SkImageInfo::Make(width, height, ct, at);
    size_t rowBytes = SkAlign4(info.minRowBytes());
    result->fBitmap.allocPixels(info, rowBytes);

    PIXEL_TYPE* scanline = (PIXEL_TYPE*)result->fBitmap.getAddr(0, 0);
    for (int x = 0; x < width; ++x) {
        scanline[x] = outerRingColor;
    }
    scanline = (PIXEL_TYPE*)result->fBitmap.getAddr(0, 1);
    scanline[0] = outerRingColor;
    for (int x = 1; x < width - 1; ++x) {
        scanline[x] = innerRingColor;
    }
    scanline[width - 1] = outerRingColor;

    for (int y = 2; y < height / 2; ++y) {
        scanline = (PIXEL_TYPE*)result->fBitmap.getAddr(0, y);
        scanline[0] = outerRingColor;
        scanline[1] = innerRingColor;
        for (int x = 2; x < width / 2; ++x) {
            scanline[x] = checkColor1;
        }
        for (int x = width / 2; x < width - 2; ++x) {
            scanline[x] = checkColor2;
        }
        scanline[width - 2] = innerRingColor;
        scanline[width - 1] = outerRingColor;
    }

    for (int y = height / 2; y < height - 2; ++y) {
        scanline = (PIXEL_TYPE*)result->fBitmap.getAddr(0, y);
        scanline[0] = outerRingColor;
        scanline[1] = innerRingColor;
        for (int x = 2; x < width / 2; ++x) {
            scanline[x] = checkColor2;
        }
        for (int x = width / 2; x < width - 2; ++x) {
            scanline[x] = checkColor1;
        }
        scanline[width - 2] = innerRingColor;
        scanline[width - 1] = outerRingColor;
    }

    scanline = (PIXEL_TYPE*)result->fBitmap.getAddr(0, height - 2);
    scanline[0] = outerRingColor;
    for (int x = 1; x < width - 1; ++x) {
        scanline[x] = innerRingColor;
    }
    scanline[width - 1] = outerRingColor;

    scanline = (PIXEL_TYPE*)result->fBitmap.getAddr(0, height - 1);
    for (int x = 0; x < width; ++x) {
        scanline[x] = outerRingColor;
    }
    result->fBitmap.setImmutable();
    result->fRect.set(2, 2, width - 2, height - 2);
    return true;
}
コード例 #13
0
bool SkPngEncoderMgr::setHeader(const SkImageInfo& srcInfo, const SkPngEncoder::Options& options) {
    if (setjmp(png_jmpbuf(fPngPtr))) {
        return false;
    }

    int pngColorType;
    png_color_8 sigBit;
    int bitDepth = 8;
    switch (srcInfo.colorType()) {
        case kRGBA_F16_SkColorType:
        case kRGBA_F32_SkColorType:
            sigBit.red = 16;
            sigBit.green = 16;
            sigBit.blue = 16;
            sigBit.alpha = 16;
            bitDepth = 16;
            pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA;
            fPngBytesPerPixel = 8;
            break;
        case kGray_8_SkColorType:
            sigBit.gray = 8;
            pngColorType = PNG_COLOR_TYPE_GRAY;
            fPngBytesPerPixel = 1;
            SkASSERT(srcInfo.isOpaque());
            break;
        case kRGBA_8888_SkColorType:
        case kBGRA_8888_SkColorType:
            sigBit.red = 8;
            sigBit.green = 8;
            sigBit.blue = 8;
            sigBit.alpha = 8;
            pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA;
            fPngBytesPerPixel = srcInfo.isOpaque() ? 3 : 4;
            break;
        case kRGB_888x_SkColorType:
            sigBit.red   = 8;
            sigBit.green = 8;
            sigBit.blue  = 8;
            pngColorType = PNG_COLOR_TYPE_RGB;
            fPngBytesPerPixel = 3;
            SkASSERT(srcInfo.isOpaque());
            break;
        case kARGB_4444_SkColorType:
            if (kUnpremul_SkAlphaType == srcInfo.alphaType()) {
                return false;
            }

            sigBit.red = 4;
            sigBit.green = 4;
            sigBit.blue = 4;
            sigBit.alpha = 4;
            pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA;
            fPngBytesPerPixel = srcInfo.isOpaque() ? 3 : 4;
            break;
        case kRGB_565_SkColorType:
            sigBit.red = 5;
            sigBit.green = 6;
            sigBit.blue = 5;
            pngColorType = PNG_COLOR_TYPE_RGB;
            fPngBytesPerPixel = 3;
            SkASSERT(srcInfo.isOpaque());
            break;
        case kAlpha_8_SkColorType:  // store as gray+alpha, but ignore gray
            sigBit.gray = kGraySigBit_GrayAlphaIsJustAlpha;
            sigBit.alpha = 8;
            pngColorType = PNG_COLOR_TYPE_GRAY_ALPHA;
            fPngBytesPerPixel = 2;
            break;
        case kRGBA_1010102_SkColorType:
            bitDepth     = 16;
            sigBit.red   = 10;
            sigBit.green = 10;
            sigBit.blue  = 10;
            sigBit.alpha = 2;
            pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA;
            fPngBytesPerPixel = 8;
            break;
        case kRGB_101010x_SkColorType:
            bitDepth     = 16;
            sigBit.red   = 10;
            sigBit.green = 10;
            sigBit.blue  = 10;
            pngColorType = PNG_COLOR_TYPE_RGB;
            fPngBytesPerPixel = 6;
            break;
        default:
            return false;
    }

    png_set_IHDR(fPngPtr, fInfoPtr, srcInfo.width(), srcInfo.height(),
                 bitDepth, pngColorType,
                 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
                 PNG_FILTER_TYPE_BASE);
    png_set_sBIT(fPngPtr, fInfoPtr, &sigBit);

    int filters = (int)options.fFilterFlags & (int)SkPngEncoder::FilterFlag::kAll;
    SkASSERT(filters == (int)options.fFilterFlags);
    png_set_filter(fPngPtr, PNG_FILTER_TYPE_BASE, filters);

    int zlibLevel = SkTMin(SkTMax(0, options.fZLibLevel), 9);
    SkASSERT(zlibLevel == options.fZLibLevel);
    png_set_compression_level(fPngPtr, zlibLevel);

    // Set comments in tEXt chunk
    const sk_sp<SkDataTable>& comments = options.fComments;
    if (comments != nullptr) {
        std::vector<png_text> png_texts(comments->count());
        std::vector<SkString> clippedKeys;
        for (int i = 0; i < comments->count() / 2; ++i) {
            const char* keyword;
            const char* originalKeyword = comments->atStr(2 * i);
            const char* text = comments->atStr(2 * i + 1);
            if (strlen(originalKeyword) <= PNG_KEYWORD_MAX_LENGTH) {
                keyword = originalKeyword;
            } else {
                SkDEBUGFAILF("PNG tEXt keyword should be no longer than %d.",
                        PNG_KEYWORD_MAX_LENGTH);
                clippedKeys.emplace_back(originalKeyword, PNG_KEYWORD_MAX_LENGTH);
                keyword = clippedKeys.back().c_str();
            }
            // It seems safe to convert png_const_charp to png_charp for key/text,
            // and we don't have to provide text_length and other fields as we're providing
            // 0-terminated c_str with PNG_TEXT_COMPRESSION_NONE (no compression, no itxt).
            png_texts[i].compression = PNG_TEXT_COMPRESSION_NONE;
            png_texts[i].key = (png_charp)keyword;
            png_texts[i].text = (png_charp)text;
        }
        png_set_text(fPngPtr, fInfoPtr, png_texts.data(), png_texts.size());
    }

    return true;
}
コード例 #14
0
sk_sp<SkSurface>
SkSurface_Compute::onNewSurface(const SkImageInfo& info)
{
  return sk_make_sp<SkSurface_Compute>(compute,info.width(),info.height());
}
コード例 #15
0
ファイル: SkJpegCodec.cpp プロジェクト: 03050903/skia
/*
 * Checks if the conversion between the input image and the requested output
 * image has been implemented
 * Sets the output color space
 */
bool SkJpegCodec::setOutputColorSpace(const SkImageInfo& dstInfo, bool needsColorXform) {
    if (kUnknown_SkAlphaType == dstInfo.alphaType()) {
        return false;
    }

    if (kOpaque_SkAlphaType != dstInfo.alphaType()) {
        SkCodecPrintf("Warning: an opaque image should be decoded as opaque "
                      "- it is being decoded as non-opaque, which will draw slower\n");
    }

    // Check if we will decode to CMYK.  libjpeg-turbo does not convert CMYK to RGBA, so
    // we must do it ourselves.
    J_COLOR_SPACE encodedColorType = fDecoderMgr->dinfo()->jpeg_color_space;
    bool isCMYK = (JCS_CMYK == encodedColorType || JCS_YCCK == encodedColorType);

    // Check for valid color types and set the output color space
    switch (dstInfo.colorType()) {
        case kRGBA_8888_SkColorType:
            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else {
                fDecoderMgr->dinfo()->out_color_space = JCS_EXT_RGBA;
            }
            return true;
        case kBGRA_8888_SkColorType:
            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else if (needsColorXform) {
                // Our color transformation code requires RGBA order inputs, but it'll swizzle
                // to BGRA for us.
                fDecoderMgr->dinfo()->out_color_space = JCS_EXT_RGBA;
            } else {
                fDecoderMgr->dinfo()->out_color_space = JCS_EXT_BGRA;
            }
            return true;
        case kRGB_565_SkColorType:
            if (needsColorXform) {
                return false;
            }

            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else {
#ifdef TURBO_HAS_565
                fDecoderMgr->dinfo()->dither_mode = JDITHER_NONE;
                fDecoderMgr->dinfo()->out_color_space = JCS_RGB565;
#else
                fDecoderMgr->dinfo()->out_color_space = JCS_RGB;
#endif
            }
            return true;
        case kGray_8_SkColorType:
            if (needsColorXform || JCS_GRAYSCALE != encodedColorType) {
                return false;
            }

            fDecoderMgr->dinfo()->out_color_space = JCS_GRAYSCALE;
            return true;
        case kRGBA_F16_SkColorType:
            SkASSERT(needsColorXform);

            if (isCMYK) {
                fDecoderMgr->dinfo()->out_color_space = JCS_CMYK;
            } else {
                fDecoderMgr->dinfo()->out_color_space = JCS_EXT_RGBA;
            }
            return true;
        default:
            return false;
    }
}
コード例 #16
0
ファイル: SkPngCodec.cpp プロジェクト: sylvestre/skia
// Reads the header and initializes the output fields, if not NULL.
//
// @param stream Input data. Will be read to get enough information to properly
//      setup the codec.
// @param chunkReader SkPngChunkReader, for reading unknown chunks. May be NULL.
//      If not NULL, png_ptr will hold an *unowned* pointer to it. The caller is
//      expected to continue to own it for the lifetime of the png_ptr.
// @param outCodec Optional output variable.  If non-NULL, will be set to a new
//      SkPngCodec on success.
// @param png_ptrp Optional output variable. If non-NULL, will be set to a new
//      png_structp on success.
// @param info_ptrp Optional output variable. If non-NULL, will be set to a new
//      png_infop on success;
// @return true on success, in which case the caller is responsible for calling
//      png_destroy_read_struct(png_ptrp, info_ptrp).
//      If it returns false, the passed in fields (except stream) are unchanged.
static bool read_header(SkStream* stream, SkPngChunkReader* chunkReader, SkCodec** outCodec,
                        png_structp* png_ptrp, png_infop* info_ptrp) {
    // The image is known to be a PNG. Decode enough to know the SkImageInfo.
    png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr,
                                                 sk_error_fn, sk_warning_fn);
    if (!png_ptr) {
        return false;
    }

    AutoCleanPng autoClean(png_ptr);

    png_infop info_ptr = png_create_info_struct(png_ptr);
    if (info_ptr == nullptr) {
        return false;
    }

    autoClean.setInfoPtr(info_ptr);

    // FIXME: Could we use the return value of setjmp to specify the type of
    // error?
    if (setjmp(png_jmpbuf(png_ptr))) {
        return false;
    }

    png_set_read_fn(png_ptr, static_cast<void*>(stream), sk_read_fn);

#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
    // Hookup our chunkReader so we can see any user-chunks the caller may be interested in.
    // This needs to be installed before we read the png header.  Android may store ninepatch
    // chunks in the header.
    if (chunkReader) {
        png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_ALWAYS, (png_byte*)"", 0);
        png_set_read_user_chunk_fn(png_ptr, (png_voidp) chunkReader, sk_read_user_chunk);
    }
#endif

    // The call to png_read_info() gives us all of the information from the
    // PNG file before the first IDAT (image data chunk).
    png_read_info(png_ptr, info_ptr);
    png_uint_32 origWidth, origHeight;
    int bitDepth, encodedColorType;
    png_get_IHDR(png_ptr, info_ptr, &origWidth, &origHeight, &bitDepth,
                 &encodedColorType, nullptr, nullptr, nullptr);

    // Tell libpng to strip 16 bit/color files down to 8 bits/color.
    // TODO: Should we handle this in SkSwizzler?  Could this also benefit
    //       RAW decodes?
    if (bitDepth == 16) {
        SkASSERT(PNG_COLOR_TYPE_PALETTE != encodedColorType);
        png_set_strip_16(png_ptr);
    }

    // Now determine the default colorType and alphaType and set the required transforms.
    // Often, we depend on SkSwizzler to perform any transforms that we need.  However, we
    // still depend on libpng for many of the rare and PNG-specific cases.
    SkEncodedInfo::Color color;
    SkEncodedInfo::Alpha alpha;
    switch (encodedColorType) {
        case PNG_COLOR_TYPE_PALETTE:
            // Extract multiple pixels with bit depths of 1, 2, and 4 from a single
            // byte into separate bytes (useful for paletted and grayscale images).
            if (bitDepth < 8) {
                // TODO: Should we use SkSwizzler here?
                png_set_packing(png_ptr);
            }

            color = SkEncodedInfo::kPalette_Color;
            // Set the alpha depending on if a transparency chunk exists.
            alpha = png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) ?
                    SkEncodedInfo::kUnpremul_Alpha : SkEncodedInfo::kOpaque_Alpha;
            break;
        case PNG_COLOR_TYPE_RGB:
            if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
                // Convert to RGBA if transparency chunk exists.
                png_set_tRNS_to_alpha(png_ptr);
                color = SkEncodedInfo::kRGBA_Color;
                alpha = SkEncodedInfo::kBinary_Alpha;
            } else {
                color = SkEncodedInfo::kRGB_Color;
                alpha = SkEncodedInfo::kOpaque_Alpha;
            }
            break;
        case PNG_COLOR_TYPE_GRAY:
            // Expand grayscale images to the full 8 bits from 1, 2, or 4 bits/pixel.
            if (bitDepth < 8) {
                // TODO: Should we use SkSwizzler here?
                png_set_expand_gray_1_2_4_to_8(png_ptr);
            }

            if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
                png_set_tRNS_to_alpha(png_ptr);
                color = SkEncodedInfo::kGrayAlpha_Color;
                alpha = SkEncodedInfo::kBinary_Alpha;
            } else {
                color = SkEncodedInfo::kGray_Color;
                alpha = SkEncodedInfo::kOpaque_Alpha;
            }
            break;
        case PNG_COLOR_TYPE_GRAY_ALPHA:
            color = SkEncodedInfo::kGrayAlpha_Color;
            alpha = SkEncodedInfo::kUnpremul_Alpha;
            break;
        case PNG_COLOR_TYPE_RGBA:
            color = SkEncodedInfo::kRGBA_Color;
            alpha = SkEncodedInfo::kUnpremul_Alpha;
            break;
        default:
            // All the color types have been covered above.
            SkASSERT(false);
            color = SkEncodedInfo::kRGBA_Color;
            alpha = SkEncodedInfo::kUnpremul_Alpha;
    }

    int numberPasses = png_set_interlace_handling(png_ptr);

    autoClean.release();
    if (png_ptrp) {
        *png_ptrp = png_ptr;
    }
    if (info_ptrp) {
        *info_ptrp = info_ptr;
    }

    if (outCodec) {
        sk_sp<SkColorSpace> colorSpace = read_color_space(png_ptr, info_ptr);
        if (!colorSpace) {
            // Treat unmarked pngs as sRGB.
            colorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
        }

        SkEncodedInfo encodedInfo = SkEncodedInfo::Make(color, alpha, 8);
        SkImageInfo imageInfo = encodedInfo.makeImageInfo(origWidth, origHeight, colorSpace);

        if (SkEncodedInfo::kOpaque_Alpha == alpha) {
            png_color_8p sigBits;
            if (png_get_sBIT(png_ptr, info_ptr, &sigBits)) {
                if (5 == sigBits->red && 6 == sigBits->green && 5 == sigBits->blue) {
                    // Recommend a decode to 565 if the sBIT indicates 565.
                    imageInfo = imageInfo.makeColorType(kRGB_565_SkColorType);
                }
            }
        }

        if (1 == numberPasses) {
            *outCodec = new SkPngNormalCodec(encodedInfo, imageInfo, stream,
                    chunkReader, png_ptr, info_ptr, bitDepth);
        } else {
            *outCodec = new SkPngInterlacedCodec(encodedInfo, imageInfo, stream,
                    chunkReader, png_ptr, info_ptr, bitDepth, numberPasses);
        }
    }

    return true;
}
コード例 #17
0
ファイル: SkScaledCodec.cpp プロジェクト: webbjiang/skia
SkCodec::Result SkScaledCodec::onGetPixels(const SkImageInfo& requestedInfo, void* dst,
                                           size_t rowBytes, const Options& options,
                                           SkPMColor ctable[], int* ctableCount) {

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

    Result result = fScanlineDecoder->start(requestedInfo, &options, ctable, ctableCount);
    if (kSuccess == result) {
        // native decode supported
        return fScanlineDecoder->getScanlines(dst, requestedInfo.height(), rowBytes);

    }

    if (kInvalidScale != result) {
        // no scaling requested
        return result;
    }
    
    // scaling requested
    int sampleX;
    int sampleY;
    if (!scaling_supported(requestedInfo, fScanlineDecoder->getInfo(), &sampleX, &sampleY)) {
        return kInvalidScale;
    }
    // set first sample pixel in y direction
    int Y0 = sampleY >> 1;

    int dstHeight = requestedInfo.height();
    int srcHeight = fScanlineDecoder->getInfo().height();
    
    SkImageInfo info = requestedInfo;
    // use original height as scanlineDecoder does not support y sampling natively
    info = info.makeWH(requestedInfo.width(), srcHeight);

    // update scanlineDecoder with new info
    result = fScanlineDecoder->start(info, &options, ctable, ctableCount);
    if (kSuccess != result) {
        return result;
    }
    
    const bool requiresPostYSampling = fScanlineDecoder->requiresPostYSampling();

    if (requiresPostYSampling) {
        SkAutoMalloc storage(srcHeight * rowBytes);
        uint8_t* storagePtr = static_cast<uint8_t*>(storage.get());
        result = fScanlineDecoder->getScanlines(storagePtr, srcHeight, rowBytes);
        if (kSuccess != result) {
            return result;
        }
        storagePtr += Y0 * rowBytes;
        for (int y = 0; y < dstHeight; y++) {
            memcpy(dst, storagePtr, rowBytes);
            storagePtr += sampleY * rowBytes;
            dst = SkTAddOffset<void>(dst, rowBytes);
        }
    } else {
        // does not require post y sampling
        result = fScanlineDecoder->skipScanlines(Y0);
        if (kSuccess != result) {
            return result;
        }
        for (int y = 0; y < dstHeight; y++) {
            result = fScanlineDecoder->getScanlines(dst, 1, rowBytes);
            if (kSuccess != result) {
                return result;
            }
            if (y < dstHeight - 1) {
                result = fScanlineDecoder->skipScanlines(sampleY - 1);
                if (kSuccess != result) {
                    return result;
                }
            }
            dst = SkTAddOffset<void>(dst, rowBytes);
        }
    }
    return kSuccess;
}