src/libnr/nr-pixblock-pixel.cpp

   1 #define __NR_PIXBLOCK_PIXEL_C__
   2
   3 /*
   4  * Pixel buffer rendering library
   5  *
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * This code is in public domain
  10  */
  11
  12 #include "nr-pixops.h"
  13 #include "nr-pixblock-pixel.h"
  14
  15 void
  16 nr_compose_pixblock_pixblock_pixel (NRPixBlock *dpb, unsigned char *d, const NRPixBlock *spb, const unsigned char *s)
  17 {
  18         if (spb->empty) return;
  19
  20         if (dpb->empty) {
  21                 /* Empty destination */
  22                 switch (dpb->mode) {
  23                 case NR_PIXBLOCK_MODE_A8:
  24                         switch (spb->mode) {
  25                         case NR_PIXBLOCK_MODE_A8:
  26                                 break;
  27                         case NR_PIXBLOCK_MODE_R8G8B8:
  28                                 d[0] = 255;
  29                                 break;
  30                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
  31                                 d[0] = s[3];
  32                                 break;
  33                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
  34                                 d[0] = s[3];
  35                                 break;
  36                         default:
  37                                 break;
  38                         }
  39                         break;
  40                 case NR_PIXBLOCK_MODE_R8G8B8:
  41                         switch (spb->mode) {
  42                         case NR_PIXBLOCK_MODE_A8:
  43                                 break;
  44                         case NR_PIXBLOCK_MODE_R8G8B8:
  45                                 d[0] = s[0];
  46                                 d[1] = s[1];
  47                                 d[2] = s[2];
  48                                 break;
  49                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
  50                                 d[0] = NR_COMPOSEN11_1111 (s[0], s[3], 255);
  51                                 d[1] = NR_COMPOSEN11_1111 (s[1], s[3], 255);
  52                                 d[2] = NR_COMPOSEN11_1111 (s[2], s[3], 255);
  53                                 break;
  54                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
  55                                 d[0] = NR_COMPOSEP11_1111 (s[0], s[3], 255);
  56                                 d[1] = NR_COMPOSEP11_1111 (s[1], s[3], 255);
  57                                 d[2] = NR_COMPOSEP11_1111 (s[2], s[3], 255);
  58                                 break;
  59                         default:
  60                                 break;
  61                         }
  62                         break;
  63                 case NR_PIXBLOCK_MODE_R8G8B8A8N:
  64                         switch (spb->mode) {
  65                         case NR_PIXBLOCK_MODE_A8:
  66                                 break;
  67                         case NR_PIXBLOCK_MODE_R8G8B8:
  68                                 d[0] = s[0];
  69                                 d[1] = s[1];
  70                                 d[2] = s[2];
  71                                 d[3] = 255;
  72                                 break;
  73                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
  74                                 d[0] = s[0];
  75                                 d[1] = s[1];
  76                                 d[2] = s[2];
  77                                 d[3] = s[3];
  78                                 break;
  79                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
  80                                 if (s[3] == 0) {
  81                                         d[0] = 255;
  82                                         d[1] = 255;
  83                                         d[2] = 255;
  84                                 } else {
  85                                         d[0] = NR_DEMUL_111(s[0], s[3]);
  86                                         d[1] = NR_DEMUL_111(s[0], s[3]);
  87                                         d[2] = NR_DEMUL_111(s[0], s[3]);
  88                                 }
  89                                 d[3] = s[3];
  90                                 break;
  91                         default:
  92                                 break;
  93                         }
  94                         break;
  95                 case NR_PIXBLOCK_MODE_R8G8B8A8P:
  96                         switch (spb->mode) {
  97                         case NR_PIXBLOCK_MODE_A8:
  98                                 break;
  99                         case NR_PIXBLOCK_MODE_R8G8B8:
 100                                 d[0] = s[0];
 101                                 d[1] = s[1];
 102                                 d[2] = s[2];
 103                                 d[3] = 255;
 104                                 break;
 105                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
 106                                 d[0] = NR_PREMUL_111 (s[0], s[3]);
 107                                 d[1] = NR_PREMUL_111 (s[1], s[3]);
 108                                 d[2] = NR_PREMUL_111 (s[2], s[3]);
 109                                 d[3] = s[3];
 110                                 break;
 111                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
 112                                 d[0] = s[0];
 113                                 d[1] = s[1];
 114                                 d[2] = s[2];
 115                                 d[3] = s[3];
 116                                 break;
 117                         default:
 118                                 break;
 119                         }
 120                         break;
 121                 default:
 122                         break;
 123                 }
 124         } else {
 125                 /* Image destination */
 126                 switch (dpb->mode) {
 127                 case NR_PIXBLOCK_MODE_A8:
 128                         switch (spb->mode) {
 129                         case NR_PIXBLOCK_MODE_A8:
 130                                 break;
 131                         case NR_PIXBLOCK_MODE_R8G8B8:
 132                                 d[0] = 255;
 133                                 break;
 134                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
 135                                 d[0] = NR_COMPOSEA_111(s[3], d[0]);
 136                                 break;
 137                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
 138                                 d[0] = NR_COMPOSEA_111(s[3], d[0]);
 139                                 break;
 140                         default:
 141                                 break;
 142                         }
 143                         break;
 144                 case NR_PIXBLOCK_MODE_R8G8B8:
 145                         switch (spb->mode) {
 146                         case NR_PIXBLOCK_MODE_A8:
 147                                 break;
 148                         case NR_PIXBLOCK_MODE_R8G8B8:
 149                                 d[0] = s[0];
 150                                 d[1] = s[1];
 151                                 d[2] = s[2];
 152                                 break;
 153                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
 154                                 d[0] = NR_COMPOSEN11_1111 (s[0], s[3], d[0]);
 155                                 d[1] = NR_COMPOSEN11_1111 (s[1], s[3], d[1]);
 156                                 d[2] = NR_COMPOSEN11_1111 (s[2], s[3], d[2]);
 157                                 break;
 158                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
 159                                 d[0] = NR_COMPOSEP11_1111 (s[0], s[3], d[0]);
 160                                 d[1] = NR_COMPOSEP11_1111 (s[1], s[3], d[1]);
 161                                 d[2] = NR_COMPOSEP11_1111 (s[2], s[3], d[2]);
 162                                 break;
 163                         default:
 164                                 break;
 165                         }
 166                         break;
 167                 case NR_PIXBLOCK_MODE_R8G8B8A8N:
 168                         switch (spb->mode) {
 169                         case NR_PIXBLOCK_MODE_A8:
 170                                 break;
 171                         case NR_PIXBLOCK_MODE_R8G8B8:
 172                                 d[0] = s[0];
 173                                 d[1] = s[1];
 174                                 d[2] = s[2];
 175                                 break;
 176                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
 177                                 if (s[3] != 0) {
 178                                         unsigned int ca;
 179                                         ca = NR_COMPOSEA_112(s[3], d[3]);
 180                                         d[0] = NR_COMPOSENNN_111121 (s[0], s[3], d[0], d[3], ca);
 181                                         d[1] = NR_COMPOSENNN_111121 (s[1], s[3], d[1], d[3], ca);
 182                                         d[2] = NR_COMPOSENNN_111121 (s[2], s[3], d[2], d[3], ca);
 183                                         d[3] = NR_NORMALIZE_21(ca);
 184                                 }
 185                                 break;
 186                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
 187                                 if (s[3] != 0) {
 188                                         unsigned int ca;
 189                                         ca = NR_COMPOSEA_112(s[3], d[3]);
 190                                         d[0] = NR_COMPOSEPNN_111121 (s[0], s[3], d[0], d[3], ca);
 191                                         d[1] = NR_COMPOSEPNN_111121 (s[1], s[3], d[0], d[3], ca);
 192                                         d[2] = NR_COMPOSEPNN_111121 (s[2], s[3], d[0], d[3], ca);
 193                                         d[3] = NR_NORMALIZE_21(ca);
 194                                 }
 195                                 break;
 196                         default:
 197                                 break;
 198                         }
 199                         break;
 200                 case NR_PIXBLOCK_MODE_R8G8B8A8P:
 201                         switch (spb->mode) {
 202                         case NR_PIXBLOCK_MODE_A8:
 203                                 break;
 204                         case NR_PIXBLOCK_MODE_R8G8B8:
 205                                 d[0] = s[0];
 206                                 d[1] = s[1];
 207                                 d[2] = s[2];
 208                                 break;
 209                         case NR_PIXBLOCK_MODE_R8G8B8A8N:
 210                                 d[0] = NR_COMPOSENPP_1111 (s[0], s[3], d[0]);
 211                                 d[1] = NR_COMPOSENPP_1111 (s[1], s[3], d[1]);
 212                                 d[2] = NR_COMPOSENPP_1111 (s[2], s[3], d[2]);
 213                                 d[3] = NR_COMPOSEA_111(s[3], d[3]);
 214                                 break;
 215                         case NR_PIXBLOCK_MODE_R8G8B8A8P:
 216                                 d[0] = NR_COMPOSEPPP_1111 (s[0], s[3], d[0]);
 217                                 d[1] = NR_COMPOSEPPP_1111 (s[1], s[3], d[1]);
 218                                 d[2] = NR_COMPOSEPPP_1111 (s[2], s[3], d[2]);
 219                                 d[3] = NR_COMPOSEA_111(s[3], d[3]);
 220                                 break;
 221                         default:
 222                                 break;
 223                         }
 224                         break;
 225                 default:
 226                         break;
 227                 }
 228         }
 229 }
 230