dib16bpp.c

来自「一个类似windows」· C语言代码 · 共 971 行 · 第 1/3 页
971 行
/*
 *  ReactOS W32 Subsystem
 *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <w32k.h>

#define NDEBUG
#include <debug.h>

VOID
DIB_16BPP_PutPixel(SURFOBJ *SurfObj, LONG x, LONG y, ULONG c)
{
  PBYTE byteaddr = (PBYTE)SurfObj->pvScan0 + y * SurfObj->lDelta;
  PWORD addr = (PWORD)byteaddr + x;

  *addr = (WORD)c;
}

ULONG
DIB_16BPP_GetPixel(SURFOBJ *SurfObj, LONG x, LONG y)
{
  PBYTE byteaddr = (PBYTE)SurfObj->pvScan0 + y * SurfObj->lDelta;
  PWORD addr = (PWORD)byteaddr + x;

  return (ULONG)(*addr);
}

VOID
DIB_16BPP_HLine(SURFOBJ *SurfObj, LONG x1, LONG x2, LONG y, ULONG c)
{
  PDWORD addr = (PDWORD)((PWORD)((PBYTE)SurfObj->pvScan0 + y * SurfObj->lDelta) + x1);

#if defined(_M_IX86) && !defined(_MSC_VER)
  /* This is about 10% faster than the generic C code below */
  LONG Count = x2 - x1;

  __asm__ __volatile__ (
"  cld\n"
"  mov  %0, %%eax\n"
"  shl  $16, %%eax\n"
"  andl $0xffff, %0\n"  /* If the pixel value is "abcd", put "abcdabcd" in %eax */
"  or   %0, %%eax\n"
"  mov  %2, %%edi\n"
"  test $0x03, %%edi\n" /* Align to fullword boundary */
"  jz   0f\n"
"  stosw\n"
"  dec  %1\n"
"  jz   1f\n"
"0:\n"
"  mov  %1,%%ecx\n"     /* Setup count of fullwords to fill */
"  shr  $1,%%ecx\n"
"  rep stosl\n"         /* The actual fill */
"  test $0x01, %1\n"    /* One left to do at the right side? */
"  jz   1f\n"
"  stosw\n"
"1:\n"
  : /* no output */
  : "r"(c), "r"(Count), "m"(addr)
  : "%eax", "%ecx", "%edi");
#else /* _M_IX86 */
  LONG cx = x1;
  DWORD cc;

  if (0 != (cx & 0x01)) {
    *((PWORD) addr) = c;
    cx++;
    addr = (PDWORD)((PWORD)(addr) + 1);
  }
  cc = ((c & 0xffff) << 16) | (c & 0xffff);
  while(cx + 1 < x2) {
    *addr++ = cc;
    cx += 2;
  }
  if (cx < x2) {
    *((PWORD) addr) = c;
  }
#endif /* _M_IX86 */
}


VOID
DIB_16BPP_VLine(SURFOBJ *SurfObj, LONG x, LONG y1, LONG y2, ULONG c)
{
#if defined(_M_IX86) && !defined(_MSC_VER)
  asm volatile(
    "   testl %2, %2"       "\n\t"
    "   jle   2f"           "\n\t"
    "   movl  %2, %%ecx"    "\n\t"
    "   shrl  $2, %2"       "\n\t"
    "   andl  $3, %%ecx"    "\n\t"
    "   jz    1f"           "\n\t"
    "0:"                    "\n\t"
    "   movw  %%ax, (%0)"   "\n\t"
    "   addl  %1, %0"       "\n\t"
    "   decl  %%ecx"        "\n\t"
    "   jnz   0b"           "\n\t"
    "   testl %2, %2"       "\n\t"
    "   jz    2f"           "\n\t"
    "1:"                    "\n\t"
    "   movw  %%ax, (%0)"   "\n\t"
    "   addl  %1, %0"       "\n\t"
    "   movw  %%ax, (%0)"   "\n\t"
    "   addl  %1, %0"       "\n\t"
    "   movw  %%ax, (%0)"   "\n\t"
    "   addl  %1, %0"       "\n\t"
    "   movw  %%ax, (%0)"   "\n\t"
    "   addl  %1, %0"       "\n\t"
    "   decl  %2"           "\n\t"
    "   jnz   1b"           "\n\t"
    "2:"                    "\n\t"
    : /* no output */
    : "r"((PBYTE)SurfObj->pvScan0 + (y1 * SurfObj->lDelta) + (x * sizeof (WORD))),
      "r"(SurfObj->lDelta), "r"(y2 - y1), "a"(c)
    : "cc", "memory", "%ecx");
#else
  PBYTE byteaddr = (ULONG_PTR)SurfObj->pvScan0 + y1 * SurfObj->lDelta;
  PWORD addr = (PWORD)byteaddr + x;
  LONG lDelta = SurfObj->lDelta;

  byteaddr = (PBYTE)addr;
  while(y1++ < y2) {
    *addr = (WORD)c;

    byteaddr += lDelta;
    addr = (PWORD)byteaddr;
  }
#endif
}

BOOLEAN
DIB_16BPP_BitBltSrcCopy(PBLTINFO BltInfo)
{
  LONG     i, j, sx, sy, xColor, f1;
  PBYTE    SourceBits, DestBits, SourceLine, DestLine;
  PBYTE    SourceBits_4BPP, SourceLine_4BPP;
  DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 + (BltInfo->DestRect.top * BltInfo->DestSurface->lDelta) + 2 * BltInfo->DestRect.left;

  switch(BltInfo->SourceSurface->iBitmapFormat)
  {
    case BMF_1BPP:
      sx = BltInfo->SourcePoint.x;
      sy = BltInfo->SourcePoint.y;

      for (j=BltInfo->DestRect.top; j<BltInfo->DestRect.bottom; j++)
      {
        sx = BltInfo->SourcePoint.x;
        for (i=BltInfo->DestRect.left; i<BltInfo->DestRect.right; i++)
        {
          if(DIB_1BPP_GetPixel(BltInfo->SourceSurface, sx, sy) == 0)
          {
            DIB_16BPP_PutPixel(BltInfo->DestSurface, i, j, XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, 0));
          } else {
            DIB_16BPP_PutPixel(BltInfo->DestSurface, i, j, XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, 1));
          }
          sx++;
        }
        sy++;
      }
      break;

    case BMF_4BPP:
      SourceBits_4BPP = (PBYTE)BltInfo->SourceSurface->pvScan0 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + (BltInfo->SourcePoint.x >> 1);

      for (j=BltInfo->DestRect.top; j<BltInfo->DestRect.bottom; j++)
      {
        SourceLine_4BPP = SourceBits_4BPP;
        sx = BltInfo->SourcePoint.x;
        f1 = sx & 1;

        for (i=BltInfo->DestRect.left; i<BltInfo->DestRect.right; i++)
        {
          xColor = XLATEOBJ_iXlate(BltInfo->XlateSourceToDest,
              (*SourceLine_4BPP & altnotmask[f1]) >> (4 * (1 - f1)));
          DIB_16BPP_PutPixel(BltInfo->DestSurface, i, j, xColor);
          if(f1 == 1) { SourceLine_4BPP++; f1 = 0; } else { f1 = 1; }
          sx++;
        }

        SourceBits_4BPP += BltInfo->SourceSurface->lDelta;
      }
      break;

    case BMF_8BPP:
      SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + BltInfo->SourcePoint.x;
      DestLine = DestBits;

      for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++)
      {
        SourceBits = SourceLine;
        DestBits = DestLine;

        for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++)
        {
          *((WORD *)DestBits) = (WORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *SourceBits);
          SourceBits += 1;
	  DestBits += 2;
        }

        SourceLine += BltInfo->SourceSurface->lDelta;
        DestLine += BltInfo->DestSurface->lDelta;
      }
      break;

    case BMF_16BPP:
      if (NULL == BltInfo->XlateSourceToDest || 0 != (BltInfo->XlateSourceToDest->flXlate & XO_TRIVIAL))
      {
	if (BltInfo->DestRect.top < BltInfo->SourcePoint.y)
	  {
	    SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + 2 * BltInfo->SourcePoint.x;
	    for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++)
	      {
		RtlMoveMemory(DestBits, SourceBits, 2 * (BltInfo->DestRect.right - BltInfo->DestRect.left));
		SourceBits += BltInfo->SourceSurface->lDelta;
		DestBits += BltInfo->DestSurface->lDelta;
	      }
	  }
	else
	  {
	    SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 + ((BltInfo->SourcePoint.y + BltInfo->DestRect.bottom - BltInfo->DestRect.top - 1) * BltInfo->SourceSurface->lDelta) + 2 * BltInfo->SourcePoint.x;
	    DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 + ((BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta) + 2 * BltInfo->DestRect.left;
	    for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--)
	      {
		RtlMoveMemory(DestBits, SourceBits, 2 * (BltInfo->DestRect.right - BltInfo->DestRect.left));
		SourceBits -= BltInfo->SourceSurface->lDelta;
		DestBits -= BltInfo->DestSurface->lDelta;
	      }
	  }
      }
      else
      {
	if (BltInfo->DestRect.top < BltInfo->SourcePoint.y)
	  {
	    SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + 2 * BltInfo->SourcePoint.x;
	    DestLine = DestBits;
	    for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++)
	      {
		SourceBits = SourceLine;
		DestBits = DestLine;
	        for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++)
		  {
		    *((WORD *)DestBits) = (WORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *((WORD *)SourceBits));
		    SourceBits += 2;
		    DestBits += 2;
	          }
		SourceLine += BltInfo->SourceSurface->lDelta;
		DestLine += BltInfo->DestSurface->lDelta;
	      }
	  }
	else
	  {
	    SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 + ((BltInfo->SourcePoint.y + BltInfo->DestRect.bottom - BltInfo->DestRect.top - 1) * BltInfo->SourceSurface->lDelta) + 2 * BltInfo->SourcePoint.x;
	    DestLine = (PBYTE)BltInfo->DestSurface->pvScan0 + ((BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta) + 2 * BltInfo->DestRect.left;
	    for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--)
	      {
		SourceBits = SourceLine;
		DestBits = DestLine;
	        for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++)
		  {
		    *((WORD *)DestBits) = (WORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *((WORD *)SourceBits));
		    SourceBits += 2;
		    DestBits += 2;
	          }
		SourceLine -= BltInfo->SourceSurface->lDelta;
		DestLine -= BltInfo->DestSurface->lDelta;
	      }
	  }
      }
      break;

    case BMF_24BPP:
      SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + 3 * BltInfo->SourcePoint.x;
      DestLine = DestBits;

      for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++)
      {
        SourceBits = SourceLine;
        DestBits = DestLine;

        for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++)
        {
          xColor = (*(SourceBits + 2) << 0x10) +
             (*(SourceBits + 1) << 0x08) +
             (*(SourceBits));
          *((WORD *)DestBits) = (WORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, xColor);
          SourceBits += 3;
	  DestBits += 2;
        }

        SourceLine += BltInfo->SourceSurface->lDelta;
        DestLine += BltInfo->DestSurface->lDelta;
      }
      break;

    case BMF_32BPP:
      SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + 4 * BltInfo->SourcePoint.x;
      DestLine = DestBits;

      for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++)
      {
        SourceBits = SourceLine;
        DestBits = DestLine;

        for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++)
        {
          *((WORD *)DestBits) = (WORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *((PDWORD) SourceBits));
          SourceBits += 4;
	  DestBits += 2;
        }
dib16bpp.c - 源码说明

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