Each scan line uses the same kernel values so we should calculate the kernel values once and then we can use them for every scan line.

What output pixels does this input pixel contribute to?

What input pixels contribute to this output pixel?

find minimum y position if it starts at x1

check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string

Decodes, unfilters and dequantizes *at least* 'num_rows' rows of alpha starting from row number 'row'. It assumes that rows up to (row - 1) have alrea

Decodes, unfilters and dequantizes *at least* 'num_rows' rows of alpha starting from row number 'row'. It assumes that rows up to (row - 1) have alrea

Initialize alpha decoding by parsing the alpha header and decoding the image header for alpha data stored using lossless compression. Returns false in

Initialize alpha decoding by parsing the alpha header and decoding the image header for alpha data stored using lossless compression. Returns false in

Allocates a new alpha decoder instance.

Allocates a new alpha decoder instance.

If number of colors in the image is less than or equal to MAX_PALETTE_SIZE, creates a palette and returns true, else returns false.

Appends data to the end of MemBuffer->buf_. It expands the allocated memory size if required and also updates VP8BitReader's if new memory is allocate

Appends data to the end of MemBuffer->buf_. It expands the allocated memory size if required and also updates VP8BitReader's if new memory is allocate

emit one filtered output row

emit one filtered output row

Remap argb values in src[] to packed palettes entries in dst[] using 'row' as a temporary buffer of size 'width'. We assume that all src[] values have

Remap argb values in src[] to packed palettes entries in dst[] using 'row' as a temporary buffer of size 'width'. We assume that all src[] values have