Beispiel #1
0
/*
 * Set an RLE pixel from R, G, B values
 */
void SkBmpRLECodec::setRGBPixel(void* dst, size_t dstRowBytes,
                                const SkImageInfo& dstInfo, uint32_t x,
                                uint32_t y, uint8_t red, uint8_t green,
                                uint8_t blue) {
    if (dst && is_coord_necessary(x, fSampleX, dstInfo.width())) {
        // Set the row
        uint32_t row = this->getDstRow(y, dstInfo.height());

        // Set the pixel based on destination color type
        const int dstX = get_dst_coord(x, fSampleX);
        switch (dstInfo.colorType()) {
            case kRGBA_8888_SkColorType: {
                SkPMColor* dstRow = SkTAddOffset<SkPMColor>(dst, row * (int) dstRowBytes);
                dstRow[dstX] = SkPackARGB_as_RGBA(0xFF, red, green, blue);
                break;
            }
            case kBGRA_8888_SkColorType: {
                SkPMColor* dstRow = SkTAddOffset<SkPMColor>(dst, row * (int) dstRowBytes);
                dstRow[dstX] = SkPackARGB_as_BGRA(0xFF, red, green, blue);
                break;
            }
            case kRGB_565_SkColorType: {
                uint16_t* dstRow = SkTAddOffset<uint16_t>(dst, row * (int) dstRowBytes);
                dstRow[dstX] = SkPack888ToRGB16(red, green, blue);
                break;
            }
            default:
                // This case should not be reached.  We should catch an invalid
                // color type when we check that the conversion is possible.
                SkASSERT(false);
                break;
        }
    }
}
Beispiel #2
0
/*
 * Set an RLE pixel using the color table
 */
void SkBmpRLECodec::setPixel(void* dst, size_t dstRowBytes,
                             const SkImageInfo& dstInfo, uint32_t x, uint32_t y,
                             uint8_t index) {
    if (is_coord_necessary(x, fSampleX, dstInfo.width())) {
        // Set the row
        uint32_t row = this->getDstRow(y, dstInfo.height());

        // Set the pixel based on destination color type
        const int dstX = get_dst_coord(x, fSampleX);
        switch (dstInfo.colorType()) {
            case kN32_SkColorType: {
                SkPMColor* dstRow = SkTAddOffset<SkPMColor>(dst, row * (int) dstRowBytes);
                dstRow[dstX] = fColorTable->operator[](index);
                break;
            }
            case kRGB_565_SkColorType: {
                uint16_t* dstRow = SkTAddOffset<uint16_t>(dst, row * (int) dstRowBytes);
                dstRow[dstX] = SkPixel32ToPixel16(fColorTable->operator[](index));
                break;
            }
            default:
                // This case should not be reached.  We should catch an invalid
                // color type when we check that the conversion is possible.
                SkASSERT(false);
                break;
        }
    }
}
SkCodec::Result SkSampledCodec::sampledDecode(const SkImageInfo& info, void* pixels,
        size_t rowBytes, const AndroidOptions& options) {
    // We should only call this function when sampling.
    SkASSERT(options.fSampleSize > 1);

    // Create options struct for the codec.
    SkCodec::Options sampledOptions;
    sampledOptions.fZeroInitialized = options.fZeroInitialized;
    sampledOptions.fPremulBehavior = SkTransferFunctionBehavior::kIgnore;

    // FIXME: This was already called by onGetAndroidPixels. Can we reduce that?
    int sampleSize = options.fSampleSize;
    int nativeSampleSize;
    SkISize nativeSize = this->accountForNativeScaling(&sampleSize, &nativeSampleSize);

    // Check if there is a subset.
    SkIRect subset;
    int subsetY = 0;
    int subsetWidth = nativeSize.width();
    int subsetHeight = nativeSize.height();
    if (options.fSubset) {
        // We will need to know about subsetting in the y-dimension in order to use the
        // scanline decoder.
        // Update the subset to account for scaling done by this->codec().
        const SkIRect* subsetPtr = options.fSubset;

        // Do the divide ourselves, instead of calling get_scaled_dimension. If
        // X and Y are 0, they should remain 0, rather than being upgraded to 1
        // due to being smaller than the sampleSize.
        const int subsetX = subsetPtr->x() / nativeSampleSize;
        subsetY = subsetPtr->y() / nativeSampleSize;

        subsetWidth = get_scaled_dimension(subsetPtr->width(), nativeSampleSize);
        subsetHeight = get_scaled_dimension(subsetPtr->height(), nativeSampleSize);

        // The scanline decoder only needs to be aware of subsetting in the x-dimension.
        subset.setXYWH(subsetX, 0, subsetWidth, nativeSize.height());
        sampledOptions.fSubset = &subset;
    }

    // Since we guarantee that output dimensions are always at least one (even if the sampleSize
    // is greater than a given dimension), the input sampleSize is not always the sampleSize that
    // we use in practice.
    const int sampleX = subsetWidth / info.width();
    const int sampleY = subsetHeight / info.height();

    const int samplingOffsetY = get_start_coord(sampleY);
    const int startY = samplingOffsetY + subsetY;
    const int dstHeight = info.height();

    const SkImageInfo nativeInfo = info.makeWH(nativeSize.width(), nativeSize.height());

    {
        // Although startScanlineDecode expects the bottom and top to match the
        // SkImageInfo, startIncrementalDecode uses them to determine which rows to
        // decode.
        SkCodec::Options incrementalOptions = sampledOptions;
        SkIRect incrementalSubset;
        if (sampledOptions.fSubset) {
            incrementalSubset.fTop = subsetY;
            incrementalSubset.fBottom = subsetY + subsetHeight;
            incrementalSubset.fLeft = sampledOptions.fSubset->fLeft;
            incrementalSubset.fRight = sampledOptions.fSubset->fRight;
            incrementalOptions.fSubset = &incrementalSubset;
        }
        const SkCodec::Result startResult = this->codec()->startIncrementalDecode(nativeInfo,
                pixels, rowBytes, &incrementalOptions);
        if (SkCodec::kSuccess == startResult) {
            SkSampler* sampler = this->codec()->getSampler(true);
            if (!sampler) {
                return SkCodec::kUnimplemented;
            }

            if (sampler->setSampleX(sampleX) != info.width()) {
                return SkCodec::kInvalidScale;
            }
            if (get_scaled_dimension(subsetHeight, sampleY) != info.height()) {
                return SkCodec::kInvalidScale;
            }

            sampler->setSampleY(sampleY);

            int rowsDecoded;
            const SkCodec::Result incResult = this->codec()->incrementalDecode(&rowsDecoded);
            if (incResult == SkCodec::kSuccess) {
                return SkCodec::kSuccess;
            }
            SkASSERT(incResult == SkCodec::kIncompleteInput || incResult == SkCodec::kErrorInInput);

            SkASSERT(rowsDecoded <= info.height());
            this->codec()->fillIncompleteImage(info, pixels, rowBytes, options.fZeroInitialized,
                                               info.height(), rowsDecoded);
            return incResult;
        } else if (startResult != SkCodec::kUnimplemented) {
            return startResult;
        } // kUnimplemented means use the old method.
    }

    // Start the scanline decode.
    SkCodec::Result result = this->codec()->startScanlineDecode(nativeInfo,
            &sampledOptions);
    if (SkCodec::kSuccess != result) {
        return result;
    }

    SkSampler* sampler = this->codec()->getSampler(true);
    if (!sampler) {
        return SkCodec::kUnimplemented;
    }

    if (sampler->setSampleX(sampleX) != info.width()) {
        return SkCodec::kInvalidScale;
    }
    if (get_scaled_dimension(subsetHeight, sampleY) != info.height()) {
        return SkCodec::kInvalidScale;
    }

    switch(this->codec()->getScanlineOrder()) {
        case SkCodec::kTopDown_SkScanlineOrder: {
            if (!this->codec()->skipScanlines(startY)) {
                this->codec()->fillIncompleteImage(info, pixels, rowBytes, options.fZeroInitialized,
                        dstHeight, 0);
                return SkCodec::kIncompleteInput;
            }
            void* pixelPtr = pixels;
            for (int y = 0; y < dstHeight; y++) {
                if (1 != this->codec()->getScanlines(pixelPtr, 1, rowBytes)) {
                    this->codec()->fillIncompleteImage(info, pixels, rowBytes,
                            options.fZeroInitialized, dstHeight, y + 1);
                    return SkCodec::kIncompleteInput;
                }
                if (y < dstHeight - 1) {
                    if (!this->codec()->skipScanlines(sampleY - 1)) {
                        this->codec()->fillIncompleteImage(info, pixels, rowBytes,
                                options.fZeroInitialized, dstHeight, y + 1);
                        return SkCodec::kIncompleteInput;
                    }
                }
                pixelPtr = SkTAddOffset<void>(pixelPtr, rowBytes);
            }
            return SkCodec::kSuccess;
        }
        case SkCodec::kBottomUp_SkScanlineOrder: {
            // Note that these modes do not support subsetting.
            SkASSERT(0 == subsetY && nativeSize.height() == subsetHeight);
            int y;
            for (y = 0; y < nativeSize.height(); y++) {
                int srcY = this->codec()->nextScanline();
                if (is_coord_necessary(srcY, sampleY, dstHeight)) {
                    void* pixelPtr = SkTAddOffset<void>(pixels,
                            rowBytes * get_dst_coord(srcY, sampleY));
                    if (1 != this->codec()->getScanlines(pixelPtr, 1, rowBytes)) {
                        break;
                    }
                } else {
                    if (!this->codec()->skipScanlines(1)) {
                        break;
                    }
                }
            }

            if (nativeSize.height() == y) {
                return SkCodec::kSuccess;
            }

            // We handle filling uninitialized memory here instead of using this->codec().
            // this->codec() does not know that we are sampling.
            const uint64_t fillValue = this->codec()->getFillValue(info);
            const SkImageInfo fillInfo = info.makeWH(info.width(), 1);
            for (; y < nativeSize.height(); y++) {
                int srcY = this->codec()->outputScanline(y);
                if (!is_coord_necessary(srcY, sampleY, dstHeight)) {
                    continue;
                }

                void* rowPtr = SkTAddOffset<void>(pixels, rowBytes * get_dst_coord(srcY, sampleY));
                SkSampler::Fill(fillInfo, rowPtr, rowBytes, fillValue, options.fZeroInitialized);
            }
            return SkCodec::kIncompleteInput;
        }
        default:
            SkASSERT(false);
            return SkCodec::kUnimplemented;
    }
}
Beispiel #4
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;
    }
}
Beispiel #5
0
SkCodec::Result SkSampledCodec::sampledDecode(const SkImageInfo& info, void* pixels,
        size_t rowBytes, const AndroidOptions& options) {
    // We should only call this function when sampling.
    SkASSERT(options.fSampleSize > 1);

    // Create options struct for the codec.
    SkCodec::Options sampledOptions;
    sampledOptions.fZeroInitialized = options.fZeroInitialized;

    // FIXME: This was already called by onGetAndroidPixels. Can we reduce that?
    int sampleSize = options.fSampleSize;
    int nativeSampleSize;
    SkISize nativeSize = this->accountForNativeScaling(&sampleSize, &nativeSampleSize);

    // Check if there is a subset.
    SkIRect subset;
    int subsetY = 0;
    int subsetWidth = nativeSize.width();
    int subsetHeight = nativeSize.height();
    if (options.fSubset) {
        // We will need to know about subsetting in the y-dimension in order to use the
        // scanline decoder.
        // Update the subset to account for scaling done by this->codec().
        SkIRect* subsetPtr = options.fSubset;

        // Do the divide ourselves, instead of calling get_scaled_dimension. If
        // X and Y are 0, they should remain 0, rather than being upgraded to 1
        // due to being smaller than the sampleSize.
        const int subsetX = subsetPtr->x() / nativeSampleSize;
        subsetY = subsetPtr->y() / nativeSampleSize;

        subsetWidth = get_scaled_dimension(subsetPtr->width(), nativeSampleSize);
        subsetHeight = get_scaled_dimension(subsetPtr->height(), nativeSampleSize);

        // The scanline decoder only needs to be aware of subsetting in the x-dimension.
        subset.setXYWH(subsetX, 0, subsetWidth, nativeSize.height());
        sampledOptions.fSubset = &subset;
    }

    // Start the scanline decode.
    SkCodec::Result result = this->codec()->startScanlineDecode(
            info.makeWH(nativeSize.width(), nativeSize.height()), &sampledOptions,
            options.fColorPtr, options.fColorCount);
    if (SkCodec::kSuccess != result) {
        return result;
    }

    SkSampler* sampler = this->codec()->getSampler(true);
    if (!sampler) {
        return SkCodec::kUnimplemented;
    }

    // Since we guarantee that output dimensions are always at least one (even if the sampleSize
    // is greater than a given dimension), the input sampleSize is not always the sampleSize that
    // we use in practice.
    const int sampleX = subsetWidth / info.width();
    const int sampleY = subsetHeight / info.height();
    if (sampler->setSampleX(sampleX) != info.width()) {
        return SkCodec::kInvalidScale;
    }
    if (get_scaled_dimension(subsetHeight, sampleY) != info.height()) {
        return SkCodec::kInvalidScale;
    }

    const int samplingOffsetY = get_start_coord(sampleY);
    const int startY = samplingOffsetY + subsetY;
    int dstHeight = info.height();
    switch(this->codec()->getScanlineOrder()) {
        case SkCodec::kTopDown_SkScanlineOrder: {
            if (!this->codec()->skipScanlines(startY)) {
                this->codec()->fillIncompleteImage(info, pixels, rowBytes, options.fZeroInitialized,
                        dstHeight, 0);
                return SkCodec::kIncompleteInput;
            }
            void* pixelPtr = pixels;
            for (int y = 0; y < dstHeight; y++) {
                if (1 != this->codec()->getScanlines(pixelPtr, 1, rowBytes)) {
                    this->codec()->fillIncompleteImage(info, pixels, rowBytes,
                            options.fZeroInitialized, dstHeight, y + 1);
                    return SkCodec::kIncompleteInput;
                }
                if (y < dstHeight - 1) {
                    if (!this->codec()->skipScanlines(sampleY - 1)) {
                        this->codec()->fillIncompleteImage(info, pixels, rowBytes,
                                options.fZeroInitialized, dstHeight, y + 1);
                        return SkCodec::kIncompleteInput;
                    }
                }
                pixelPtr = SkTAddOffset<void>(pixelPtr, rowBytes);
            }
            return SkCodec::kSuccess;
        }
        case SkCodec::kOutOfOrder_SkScanlineOrder:
        case SkCodec::kBottomUp_SkScanlineOrder: {
            // Note that these modes do not support subsetting.
            SkASSERT(0 == subsetY && nativeSize.height() == subsetHeight);
            int y;
            for (y = 0; y < nativeSize.height(); y++) {
                int srcY = this->codec()->nextScanline();
                if (is_coord_necessary(srcY, sampleY, dstHeight)) {
                    void* pixelPtr = SkTAddOffset<void>(pixels,
                            rowBytes * get_dst_coord(srcY, sampleY));
                    if (1 != this->codec()->getScanlines(pixelPtr, 1, rowBytes)) {
                        break;
                    }
                } else {
                    if (!this->codec()->skipScanlines(1)) {
                        break;
                    }
                }
            }

            if (nativeSize.height() == y) {
                return SkCodec::kSuccess;
            }

            // We handle filling uninitialized memory here instead of using this->codec().
            // this->codec() does not know that we are sampling.
            const uint32_t fillValue = this->codec()->getFillValue(info.colorType());
            const SkImageInfo fillInfo = info.makeWH(info.width(), 1);
            for (; y < nativeSize.height(); y++) {
                int srcY = this->codec()->outputScanline(y);
                if (!is_coord_necessary(srcY, sampleY, dstHeight)) {
                    continue;
                }

                void* rowPtr = SkTAddOffset<void>(pixels, rowBytes * get_dst_coord(srcY, sampleY));
                SkSampler::Fill(fillInfo, rowPtr, rowBytes, fillValue, options.fZeroInitialized);
            }
            return SkCodec::kIncompleteInput;
        }
        case SkCodec::kNone_SkScanlineOrder: {
            const int linesNeeded = subsetHeight - samplingOffsetY;
            SkAutoTMalloc<uint8_t> storage(linesNeeded * rowBytes);
            uint8_t* storagePtr = storage.get();

            if (!this->codec()->skipScanlines(startY)) {
                this->codec()->fillIncompleteImage(info, pixels, rowBytes, options.fZeroInitialized,
                        dstHeight, 0);
                return SkCodec::kIncompleteInput;
            }
            int scanlines = this->codec()->getScanlines(storagePtr, linesNeeded, rowBytes);

            for (int y = 0; y < dstHeight; y++) {
                memcpy(pixels, storagePtr, info.minRowBytes());
                storagePtr += sampleY * rowBytes;
                pixels = SkTAddOffset<void>(pixels, rowBytes);
            }

            if (scanlines < dstHeight) {
                // this->codec() has already handled filling uninitialized memory.
                return SkCodec::kIncompleteInput;
            }
            return SkCodec::kSuccess;
        }
        default:
            SkASSERT(false);
            return SkCodec::kUnimplemented;
    }
}