src/library/framebuffer-pixfmt-rgb16.cpp

   1 #include "framebuffer-pixfmt-rgb16.hpp"
   2
   3 namespace framebuffer
   4 {
   5 template<bool uvswap>
   6 _pixfmt_rgb16<uvswap>::~_pixfmt_rgb16() throw()
   7 {
   8 }
   9
  10 template<bool uvswap>
  11 void _pixfmt_rgb16<uvswap>::decode(uint32_t* target, const uint8_t* src, size_t width) throw()
  12 {
  13         const uint16_t* _src = reinterpret_cast<const uint16_t*>(src);
  14         for(size_t i = 0; i < width; i++) {
  15                 uint32_t word = _src[i];
  16                 uint64_t r = ((word >> (uvswap ? 11 : 0)) & 0x1F);
  17                 uint64_t g = ((word >> 5) & 0x3F);
  18                 uint64_t b = ((word >> (uvswap ? 0 : 11)) & 0x1F);
  19                 target[i] = (((r << 8) - r + 15) / 31) << 16;
  20                 target[i] |= (((g << 8) - g + 31) / 63) << 8;
  21                 target[i] |= ((b << 8) - b + 15) / 31;
  22         }
  23 }
  24
  25 template<bool uvswap>
  26 void _pixfmt_rgb16<uvswap>::decode(uint32_t* target, const uint8_t* src, size_t width,
  27         const auxpalette<false>& auxp) throw()
  28 {
  29         const uint16_t* _src = reinterpret_cast<const uint16_t*>(src);
  30         for(size_t i = 0; i < width; i++)
  31                 target[i] = auxp.pcache[_src[i]];
  32 }
  33
  34 template<bool uvswap>
  35 void _pixfmt_rgb16<uvswap>::decode(uint64_t* target, const uint8_t* src, size_t width,
  36         const auxpalette<true>& auxp) throw()
  37 {
  38         const uint16_t* _src = reinterpret_cast<const uint16_t*>(src);
  39         for(size_t i = 0; i < width; i++)
  40                 target[i] = auxp.pcache[_src[i]];
  41 }
  42
  43 template<bool uvswap>
  44 void _pixfmt_rgb16<uvswap>::set_palette(auxpalette<false>& auxp, uint8_t rshift, uint8_t gshift,
  45         uint8_t bshift) throw(std::bad_alloc)
  46 {
  47         auxp.pcache.resize(0x10000);
  48         for(size_t i = 0; i < 0x10000; i++) {
  49                 uint32_t r = ((i >> (uvswap ? 11 : 0)) & 0x1F);
  50                 uint32_t g = ((i >> 5) & 0x3F);
  51                 uint32_t b = ((i >> (uvswap ? 0 : 11)) & 0x1F);
  52                 auxp.pcache[i] = (((r << 8) - r + 15) / 31) << rshift;
  53                 auxp.pcache[i] += (((g << 8) - g + 31) / 63) << gshift;
  54                 auxp.pcache[i] += (((b << 8) - b + 15) / 31) << bshift;
  55         }
  56         auxp.rshift = rshift;
  57         auxp.gshift = gshift;
  58         auxp.bshift = bshift;
  59 }
  60
  61 template<bool uvswap>
  62 void _pixfmt_rgb16<uvswap>::set_palette(auxpalette<true>& auxp, uint8_t rshift, uint8_t gshift,
  63         uint8_t bshift) throw(std::bad_alloc)
  64 {
  65         auxp.pcache.resize(0x10000);
  66         for(size_t i = 0; i < 0x10000; i++) {
  67                 uint64_t r = ((i >> (uvswap ? 11 : 0)) & 0x1F);
  68                 uint64_t g = ((i >> 5) & 0x3F);
  69                 uint64_t b = ((i >> (uvswap ? 0 : 11)) & 0x1F);
  70                 auxp.pcache[i] = (((r << 16) - r + 15) / 31) << rshift;
  71                 auxp.pcache[i] += (((g << 16) - g + 31) / 63) << gshift;
  72                 auxp.pcache[i] += (((b << 16) - b + 15) / 31) << bshift;
  73         }
  74         auxp.rshift = rshift;
  75         auxp.gshift = gshift;
  76         auxp.bshift = bshift;
  77 }
  78
  79 template<bool uvswap>
  80 uint8_t _pixfmt_rgb16<uvswap>::get_bpp() throw()
  81 {
  82         return 2;
  83 }
  84
  85 template<bool uvswap>
  86 uint8_t _pixfmt_rgb16<uvswap>::get_ss_bpp() throw()
  87 {
  88         return 2;
  89 }
  90
  91 template<bool uvswap>
  92 uint32_t _pixfmt_rgb16<uvswap>::get_magic() throw()
  93 {
  94         if(uvswap)
  95                 return 0x74234643;
  96         else
  97                 return 0x32642474;
  98 }
  99
 100 _pixfmt_rgb16<false> pixfmt_rgb16;
 101 _pixfmt_rgb16<true> pixfmt_bgr16;
 102 }