Function Decode16

include/bmpread/bmpread.c:711–735

Decodes 16-bit bitmap data by applying bitmasks. */

/* Decodes 16-bit bitmap data by applying bitmasks.
 */
static void Decode16(uint8_t * p_out,
                     const uint8_t * p_out_end,
                     const uint8_t * p_file,
                     const read_context * p_ctx)
{
    const bitfield * bf = p_ctx->bitfields;

    while(p_out < p_out_end)
    {
        uint16_t value = LoadLittleUint16(p_file);

        *p_out++ = Make8Bits(ApplyBitfield(value, bf[0]), bf[0].span);
        *p_out++ = Make8Bits(ApplyBitfield(value, bf[1]), bf[1].span);
        *p_out++ = Make8Bits(ApplyBitfield(value, bf[2]), bf[2].span);
        if(p_ctx->out_channels == 4)
        {
            if(bf[3].span)
                *p_out++ = Make8Bits(ApplyBitfield(value, bf[3]), bf[3].span);
            else
                *p_out++ = BMPREAD_DEFAULT_ALPHA;
        }

        p_file += 2;
    }
}

/* Decodes 8-bit bitmap data by looking colors up in the palette.
 */