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Fix/indexed colorspace smask luminance and other fixes - #3
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…-component color space fallbacks - PDImageXObject: pass interpolate directly to Bitmap.createScaledBitmap instead of inverting it - PDImageXObject: guard applyMask against null image to prevent NullPointerException - PDImageXObject: pass parent resources to getMask() and getSoftMask() instead of null - PDImageXObject: expose getResources() getter - PDColorSpace: fall back CALGRAY and SEPARATION to PDDeviceGray (1 component) instead of PDDeviceRGB (3 components) to prevent 3x vertical squashing and color noise - Add PDColorSpaceTest and PDImageXObjectTest unit test suites
- SampledImageReader: guard JPEG fast-path with region == null, colorKey == null, and default decode check to prevent bypassing clipping, chroma masking, or decode arrays - SampledImageReader: validate dimensions and stream length in createBitmapFromRawStream, throwing descriptive IOException on truncated/empty streams or unsupported component counts - PDFBoxResourceLoader: throw descriptive IOException instead of throwing NullPointerException when uninitialized - Add SampledImageReaderTest and PDFBoxResourceLoaderTest unit tests
- JPEGFactory: inspect SOF marker in byte stream to accurately detect grayscale (PDDeviceGray) and CMYK (PDDeviceCMYK) JPEGs instead of unconditionally hardcoding PDDeviceRGB - JPEGFactory: batch alpha pixel extraction in chunked row buffers to prevent excessive heap allocations on large images - PDImageXObject: batch getPixels and setPixels in applyMask using chunked scanlines to slash row-by-row JNI crossings by >95% - PDDeviceGray: batch getPixels and setPixels in toRGBImage using chunked scanlines - PDDeviceCMYK: batch getPixels and setPixels in toRGBImage using chunked scanlines - LosslessFactory: batch getPixels in createFromRGBImage and createFromGrayImage using chunked scanlines - Add JPEGFactoryTest for grayscale, RGB, and CMYK SOF detection
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