src/library/framebuffer-pixfmt-rgb15.cpp

   1 #include "framebuffer-pixfmt-rgb15.hpp"
   2
   3 namespace framebuffer
   4 {
   5 template<bool uvswap>
   6 _pixfmt_rgb15<uvswap>::~_pixfmt_rgb15() throw()
   7 {
   8 }
   9
  10 template<bool uvswap>
  11 void _pixfmt_rgb15<uvswap>::decode(uint32_t* target, const uint8_t* src, size_t width)
  12         throw()
  13 {
  14         const uint16_t* _src = reinterpret_cast<const uint16_t*>(src);
  15         for(size_t i = 0; i < width; i++) {
  16                 uint32_t word = _src[i];
  17                 uint64_t r = ((word >> (uvswap ? 10 : 0)) & 0x1F);
  18                 uint64_t g = ((word >> 5) & 0x1F);
  19                 uint64_t b = ((word >> (uvswap ? 0 : 10)) & 0x1F);
  20                 target[i] = (((r << 8) - r + 15) / 31) << 16;
  21                 target[i] |= (((g << 8) - g + 15) / 31) << 8;
  22                 target[i] |= (((b << 8) - b + 15) / 31);
  23         }
  24 }
  25
  26 template<bool uvswap>
  27 void _pixfmt_rgb15<uvswap>::decode(uint32_t* target, const uint8_t* src, size_t width,
  28         const auxpalette<false>& auxp) throw()
  29 {
  30         const uint16_t* _src = reinterpret_cast<const uint16_t*>(src);
  31         for(size_t i = 0; i < width; i++)
  32                 target[i] = auxp.pcache[_src[i] & 0x7FFF];
  33 }
  34
  35 template<bool uvswap>
  36 void _pixfmt_rgb15<uvswap>::decode(uint64_t* target, const uint8_t* src, size_t width,
  37         const auxpalette<true>& auxp) throw()
  38 {
  39         const uint16_t* _src = reinterpret_cast<const uint16_t*>(src);
  40         for(size_t i = 0; i < width; i++)
  41                 target[i] = auxp.pcache[_src[i] & 0x7FFF];
  42 }
  43
  44 template<bool uvswap>
  45 void _pixfmt_rgb15<uvswap>::set_palette(auxpalette<false>& auxp, uint8_t rshift, uint8_t gshift,
  46         uint8_t bshift) throw(std::bad_alloc)
  47 {
  48         auxp.pcache.resize(0x8000);
  49         for(size_t i = 0; i < 0x8000; i++) {
  50                 uint32_t r = ((i >> (uvswap ? 10 : 0)) & 0x1F);
  51                 uint32_t g = ((i >> 5) & 0x1F);
  52                 uint32_t b = ((i >> (uvswap ? 0 : 10)) & 0x1F);
  53                 auxp.pcache[i] = (((r << 8) - r + 15) / 31) << rshift;
  54                 auxp.pcache[i] += (((g << 8) - g + 15) / 31) << gshift;
  55                 auxp.pcache[i] += (((b << 8) - b + 15) / 31) << bshift;
  56         }
  57         auxp.rshift = rshift;
  58         auxp.gshift = gshift;
  59         auxp.bshift = bshift;
  60 }
  61
  62 template<bool uvswap>
  63 void _pixfmt_rgb15<uvswap>::set_palette(auxpalette<true>& auxp, uint8_t rshift, uint8_t gshift,
  64         uint8_t bshift) throw(std::bad_alloc)
  65 {
  66         auxp.pcache.resize(0x8000);
  67         for(size_t i = 0; i < 0x8000; i++) {
  68                 uint64_t r = ((i >> (uvswap ? 10 : 0)) & 0x1F);
  69                 uint64_t g = ((i >> 5) & 0x1F);
  70                 uint64_t b = ((i >> (uvswap ? 0 : 10)) & 0x1F);
  71                 auxp.pcache[i] = (((r << 16) - r + 15) / 31) << rshift;
  72                 auxp.pcache[i] += (((g << 16) - g + 15) / 31) << gshift;
  73                 auxp.pcache[i] += (((b << 16) - b + 15) / 31) << bshift;
  74         }
  75         auxp.rshift = rshift;
  76         auxp.gshift = gshift;
  77         auxp.bshift = bshift;
  78 }
  79
  80 template<bool uvswap>
  81 uint8_t _pixfmt_rgb15<uvswap>::get_bpp() throw()
  82 {
  83         return 2;
  84 }
  85
  86 template<bool uvswap>
  87 uint8_t _pixfmt_rgb15<uvswap>::get_ss_bpp() throw()
  88 {
  89         return 2;
  90 }
  91
  92 template<bool uvswap>
  93 uint32_t _pixfmt_rgb15<uvswap>::get_magic() throw()
  94 {
  95         if(uvswap)
  96                 return 0x16326322;
  97         else
  98                 return 0x74324563;
  99 }
 100
 101 _pixfmt_rgb15<false> pixfmt_rgb15;
 102 _pixfmt_rgb15<true> pixfmt_bgr15;
 103 }