public int getNextRgb()

in src/main/java/org/apache/commons/imaging/formats/bmp/PixelParserRgb.java [38:97]
57 lines of code
9 McCabe index (conditional complexity)

    public int getNextRgb() throws ImagingException, IOException {

        switch (bhi.bitsPerPixel) {
        case 1:
        case 4: {
            if (cachedBitCount < bhi.bitsPerPixel) {
                if (cachedBitCount != 0) {
                    throw new ImagingException("Unexpected leftover bits: " + cachedBitCount + "/" + bhi.bitsPerPixel);
                }

                cachedBitCount += 8;
                cachedByte = 0xff & imageData[byteCount];
                byteCount++;
            }
            final int cacheMask = (1 << bhi.bitsPerPixel) - 1;
            final int sample = cacheMask & cachedByte >> 8 - bhi.bitsPerPixel;
            cachedByte = 0xff & cachedByte << bhi.bitsPerPixel;
            cachedBitCount -= bhi.bitsPerPixel;
            return getColorTableRgb(sample);
        }
        case 8: {
            final int sample = 0xff & imageData[byteCount + 0];
            final int rgb = getColorTableRgb(sample);
            byteCount += 1;
            return rgb;
        }
        case 16: {
            final int data = read2Bytes("Pixel", is, "BMP Image Data", ByteOrder.LITTLE_ENDIAN);
            final int blue = (0x1f & data >> 0) << 3;
            final int green = (0x1f & data >> 5) << 3;
            final int red = (0x1f & data >> 10) << 3;
            final int alpha = 0xff;
            final int rgb = alpha << 24 | red << 16 | green << 8 | blue << 0;
            byteCount += 2;
            return rgb;
        }
        case 24: {
            final int blue = 0xff & imageData[byteCount + 0];
            final int green = 0xff & imageData[byteCount + 1];
            final int red = 0xff & imageData[byteCount + 2];
            final int alpha = 0xff;
            final int rgb = alpha << 24 | red << 16 | green << 8 | blue << 0;
            byteCount += 3;
            return rgb;
        }
        case 32: {
            final int blue = 0xff & imageData[byteCount + 0];
            final int green = 0xff & imageData[byteCount + 1];
            final int red = 0xff & imageData[byteCount + 2];
            final int alpha = 0xff;
            final int rgb = alpha << 24 | red << 16 | green << 8 | blue << 0;
            byteCount += 4;
            return rgb;
        }
        default:
            break;
        }

        throw new ImagingException("Unknown BitsPerPixel: " + bhi.bitsPerPixel);
    }