reactos/subsys/win32k/dib/dib4bpp.c

   1 #undef WIN32_LEAN_AND_MEAN
   2 #include <windows.h>
   3 #include <stdlib.h>
   4 #include <win32k/bitmaps.h>
   5 #include <win32k/debug.h>
   6 #include <debug.h>
   7 #include <ddk/winddi.h>
   8 #include "../eng/objects.h"
   9 #include "dib.h"
  10
  11 PFN_DIB_PutPixel DIB_4BPP_PutPixel(PSURFOBJ SurfObj, LONG x, LONG y, ULONG c)
  12 {
  13   unsigned char *vp;
  14   unsigned char mask;
  15   PBYTE addr = SurfObj->pvBits;
  16
  17   addr += (x>>1) + y * SurfObj->lDelta;
  18   *addr = (*addr & notmask[x&1]) | (c << ((1-(x&1))<<2));
  19 }
  20
  21 PFN_DIB_GetPixel DIB_4BPP_GetPixel(PSURFOBJ SurfObj, LONG x, LONG y)
  22 {
  23   PBYTE addr = SurfObj->pvBits;
  24
  25   return (PFN_DIB_GetPixel)((addr[(x>>1) + y * SurfObj->lDelta] >> ((1-(x&1))<<2) ) & 0x0f);
  26 }
  27
  28 PFN_DIB_HLine DIB_4BPP_HLine(PSURFOBJ SurfObj, LONG x1, LONG x2, LONG y, ULONG c)
  29 {
  30   PBYTE  addr = SurfObj->pvBits + (x1>>1) + y * SurfObj->lDelta;
  31   LONG  cx = x1;
  32
  33   while(cx < x2) {
  34     *addr = (*addr & notmask[x1&1]) | (c << ((1-(x1&1))<<2));
  35     if((++x1 & 1) == 0)
  36       ++addr;
  37     ++cx;
  38   }
  39 }
  40
  41 PFN_DIB_VLine DIB_4BPP_VLine(PSURFOBJ SurfObj, LONG x, LONG y1, LONG y2, ULONG c)
  42 {
  43   PBYTE  addr = SurfObj->pvBits;
  44   int  lDelta = SurfObj->lDelta;
  45
  46   addr += (x>>1) + y1 * lDelta;
  47   while(y1++ < y2) {
  48     *addr = (*addr & notmask[x&1]) | (c << ((1-(x&1))<<2));
  49     addr += lDelta;
  50   }
  51 }
  52
  53 BOOLEAN DIB_To_4BPP_Bitblt(  SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
  54         SURFGDI *DestGDI,  SURFGDI *SourceGDI,
  55         PRECTL  DestRect,  POINTL  *SourcePoint,
  56         LONG   Delta,      XLATEOBJ *ColorTranslation)
  57 {
  58   LONG     i, j, sx, sy, f1, f2, xColor;
  59   PBYTE    SourceBits_24BPP, SourceLine_24BPP;
  60   PBYTE    DestBits, DestLine, SourceBits_4BPP, SourceBits_8BPP, SourceLine_4BPP, SourceLine_8BPP;
  61   PWORD    SourceBits_16BPP, SourceLine_16BPP;
  62   PDWORD    SourceBits_32BPP, SourceLine_32BPP;
  63
  64   DestBits = DestSurf->pvBits + (DestRect->left>>1) + DestRect->top * DestSurf->lDelta;
  65
  66   switch(SourceGDI->BitsPerPixel)
  67   {
  68     case 1:
  69       sx = SourcePoint->x;
  70       sy = SourcePoint->y;
  71
  72       for (j=DestRect->top; j<DestRect->bottom; j++)
  73       {
  74         sx = SourcePoint->x;
  75         for (i=DestRect->left; i<DestRect->right; i++)
  76         {
  77           if(DIB_1BPP_GetPixel(SourceSurf, sx, sy) == 0)
  78           {
  79             DIB_4BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, 0));
  80           } else {
  81             DIB_4BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, 1));
  82           }
  83           sx++;
  84         }
  85         sy++;
  86       }
  87       break;
  88
  89     case 4:
  90       sy = SourcePoint->y;
  91
  92       for (j=DestRect->top; j<DestRect->bottom; j++)
  93       {
  94         sx = SourcePoint->x;
  95
  96         for (i=DestRect->left; i<DestRect->right; i++)
  97         {
  98           DIB_4BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, DIB_4BPP_GetPixel(SourceSurf, sx, sy)));
  99           sx++;
 100         }
 101         sy++;
 102       }
 103       break;
 104
 105     case 8:
 106       SourceBits_8BPP = SourceSurf->pvBits + (SourcePoint->y * SourceSurf->lDelta) + SourcePoint->x;
 107
 108       for (j=DestRect->top; j<DestRect->bottom; j++)
 109       {
 110         SourceLine_8BPP = SourceBits_8BPP;
 111         DestLine = DestBits;
 112         sx = SourcePoint->x;
 113         f1 = sx & 1;
 114         f2 = DestRect->left & 1;
 115
 116         for (i=DestRect->left; i<DestRect->right; i++)
 117         {
 118           *DestLine = (*DestLine & notmask[i&1]) |
 119             ((XLATEOBJ_iXlate(ColorTranslation, *SourceLine_8BPP)) << ((4 * (1-(sx & 1)))));
 120           if(f2 == 1) { DestLine++; f2 = 0; } else { f2 = 1; }
 121           SourceLine_8BPP++;
 122           sx++;
 123         }
 124
 125         SourceBits_8BPP += SourceSurf->lDelta;
 126         DestBits += DestSurf->lDelta;
 127       }
 128       break;
 129
 130     case 24:
 131       SourceBits_24BPP = SourceSurf->pvBits + (SourcePoint->y * SourceSurf->lDelta) + SourcePoint->x * 3;
 132
 133       for (j=DestRect->top; j<DestRect->bottom; j++)
 134       {
 135         SourceLine_24BPP = SourceBits_24BPP;
 136         DestLine = DestBits;
 137         sx = SourcePoint->x;
 138         f1 = sx & 1;
 139         f2 = DestRect->left & 1;
 140
 141         for (i=DestRect->left; i<DestRect->right; i++)
 142         {
 143           xColor = (*(SourceLine_24BPP + 2) << 0x10) +
 144              (*(SourceLine_24BPP + 1) << 0x08) +
 145              (*(SourceLine_24BPP));
 146           *DestLine = (*DestLine & notmask[i&1]) |
 147             ((XLATEOBJ_iXlate(ColorTranslation, xColor)) << ((4 * (1-(sx & 1)))));
 148           if(f2 == 1) { DestLine++; f2 = 0; } else { f2 = 1; }
 149           SourceLine_24BPP+=3;
 150           sx++;
 151         }
 152
 153         SourceBits_24BPP += SourceSurf->lDelta;
 154         DestBits += DestSurf->lDelta;
 155       }
 156       break;
 157
 158     default:
 159       DbgPrint("DIB_4BPP_Bitblt: Unhandled Source BPP: %u\n", SourceGDI->BitsPerPixel);
 160       return FALSE;
 161   }
 162
 163   return TRUE;
 164 }