reactos/subsys/win32k/dib/dib16bpp.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 VOID DIB_16BPP_PutPixel(PSURFOBJ SurfObj, LONG x, LONG y, ULONG c)
  12 {
  13   PBYTE byteaddr = SurfObj->pvBits + y * SurfObj->lDelta;
  14   PWORD addr = (PWORD)byteaddr + x;
  15
  16   *addr = (WORD)c;
  17 }
  18
  19 ULONG DIB_16BPP_GetPixel(PSURFOBJ SurfObj, LONG x, LONG y)
  20 {
  21   PBYTE byteaddr = SurfObj->pvBits + y * SurfObj->lDelta;
  22   PWORD addr = (PWORD)byteaddr + x;
  23
  24   return (ULONG)(*addr);
  25 }
  26
  27 VOID DIB_16BPP_HLine(PSURFOBJ SurfObj, LONG x1, LONG x2, LONG y, ULONG c)
  28 {
  29   PBYTE byteaddr = SurfObj->pvBits + y * SurfObj->lDelta;
  30   PWORD addr = (PWORD)byteaddr + x1;
  31   LONG cx = x1;
  32
  33   while(cx < x2) {
  34     *addr = (WORD)c;
  35     ++addr;
  36     ++cx;
  37   }
  38 }
  39
  40 VOID DIB_16BPP_VLine(PSURFOBJ SurfObj, LONG x, LONG y1, LONG y2, ULONG c)
  41 {
  42   PBYTE byteaddr = SurfObj->pvBits + y1 * SurfObj->lDelta;
  43   PWORD addr = (PWORD)byteaddr + x;
  44   LONG lDelta = SurfObj->lDelta;
  45
  46   byteaddr = (PBYTE)addr;
  47   while(y1++ < y2) {
  48     *addr = (WORD)c;
  49
  50     byteaddr += lDelta;
  51     addr = (PWORD)byteaddr;
  52   }
  53 }
  54
  55 BOOL DIB_To_16BPP_Bitblt(  SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
  56         SURFGDI *DestGDI,  SURFGDI *SourceGDI,
  57         PRECTL  DestRect,  POINTL  *SourcePoint,
  58         LONG    Delta,     XLATEOBJ *ColorTranslation)
  59 {
  60   LONG     i, j, sx, sy, xColor, f1;
  61   PBYTE    SourceBits, DestBits, SourceLine, DestLine;
  62   PBYTE    SourceBits_4BPP, SourceLine_4BPP;
  63   DestBits = DestSurf->pvBits + (DestRect->top * DestSurf->lDelta) + 2 * DestRect->left;
  64
  65   switch(SourceGDI->BitsPerPixel)
  66   {
  67     case 1:
  68       sx = SourcePoint->x;
  69       sy = SourcePoint->y;
  70
  71       for (j=DestRect->top; j<DestRect->bottom; j++)
  72       {
  73         sx = SourcePoint->x;
  74         for (i=DestRect->left; i<DestRect->right; i++)
  75         {
  76           if(DIB_1BPP_GetPixel(SourceSurf, sx, sy) == 0)
  77           {
  78             DIB_16BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, 0));
  79           } else {
  80             DIB_16BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, 1));
  81           }
  82           sx++;
  83         }
  84         sy++;
  85       }
  86       break;
  87
  88     case 4:
  89       SourceBits_4BPP = SourceSurf->pvBits + (SourcePoint->y * SourceSurf->lDelta) + SourcePoint->x;
  90
  91       for (j=DestRect->top; j<DestRect->bottom; j++)
  92       {
  93         SourceLine_4BPP = SourceBits_4BPP;
  94         sx = SourcePoint->x;
  95         f1 = sx & 1;
  96
  97         for (i=DestRect->left; i<DestRect->right; i++)
  98         {
  99           xColor = XLATEOBJ_iXlate(ColorTranslation,
 100               (*SourceLine_4BPP & altnotmask[sx&1]) >> (4 * (1-(sx & 1))));
 101           DIB_16BPP_PutPixel(DestSurf, i, j, xColor);
 102           if(f1 == 1) { SourceLine_4BPP++; f1 = 0; } else { f1 = 1; }
 103           sx++;
 104         }
 105
 106         SourceBits_4BPP += SourceSurf->lDelta;
 107       }
 108       break;
 109
 110     case 16:
 111       if (NULL == ColorTranslation || 0 != (ColorTranslation->flXlate & XO_TRIVIAL))
 112       {
 113         SourceBits = SourceSurf->pvBits + (SourcePoint->y * SourceSurf->lDelta) + 2 * SourcePoint->x;
 114         for (j = DestRect->top; j < DestRect->bottom; j++)
 115         {
 116           RtlCopyMemory(DestBits, SourceBits, 2 * (DestRect->right - DestRect->left));
 117           SourceBits += SourceSurf->lDelta;
 118           DestBits += DestSurf->lDelta;
 119         }
 120       }
 121       else
 122       {
 123         /* FIXME */
 124         DPRINT1("DIB_16BPP_Bitblt: Unhandled ColorTranslation for 16 -> 16 copy");
 125         return FALSE;
 126       }
 127       break;
 128
 129     case 24:
 130       SourceLine = SourceSurf->pvBits + (SourcePoint->y * SourceSurf->lDelta) + 3 * SourcePoint->x;
 131       DestLine = DestBits;
 132
 133       for (j = DestRect->top; j < DestRect->bottom; j++)
 134       {
 135         SourceBits = SourceLine;
 136         DestBits = DestLine;
 137
 138         for (i = DestRect->left; i < DestRect->right; i++)
 139         {
 140           xColor = (*(SourceBits + 2) << 0x10) +
 141              (*(SourceBits + 1) << 0x08) +
 142              (*(SourceBits));
 143           *((WORD *)DestBits) = (WORD)XLATEOBJ_iXlate(ColorTranslation, xColor);
 144           SourceBits += 3;
 145           DestBits += 2;
 146         }
 147
 148         SourceLine += SourceSurf->lDelta;
 149         DestLine += DestSurf->lDelta;
 150       }
 151       break;
 152
 153     default:
 154       DbgPrint("DIB_16BPP_Bitblt: Unhandled Source BPP: %u\n", SourceGDI->BitsPerPixel);
 155       return FALSE;
 156   }
 157
 158   return TRUE;
 159 }