paint.c

来自「一个类似windows」· C语言 代码 · 共 242 行

#include "../vgaddi.h"
#include "../vgavideo/vgavideo.h"
#include "brush.h"

#include <debug.h>

BOOL VGADDIFillSolid(SURFOBJ *Surface, RECTL Dimensions, ULONG iColor)
{
  int x, y, x2, y2, w, h, j;
  ULONG offset, pre1;
  ULONG orgpre1, orgx, midpre1, tmppre1;
  int ileftpix, imidpix, irightpix;
/*  double leftpix, midpix, rightpix;*/
  UCHAR a;

  // Swap dimensions so that x, y are at topmost left
  if ( Dimensions.right < Dimensions.left )
  {
    x  = Dimensions.right;
    x2 = Dimensions.left;
  }
  else
  {
    x2 = Dimensions.right;
    x  = Dimensions.left;
  }
  if ( Dimensions.bottom < Dimensions.top )
  {
    y  = Dimensions.bottom;
    y2 = Dimensions.top;
  }
  else
  {
    y2 = Dimensions.bottom;
    y  = Dimensions.top;
  }

  // Calculate the width and height
  w = x2 - x;
  h = y2 - y;

  DPRINT("VGADDIFillSolid: x:%d, y:%d, w:%d, h:%d\n", x, y, w, h);

  // Calculate the starting offset
  offset = xconv[x]+y80[y];

  // Make a note of original x
  orgx = x;

  // Calculate the left mask pixels, middle bytes and right mask pixel
  ileftpix = 7 - mod8(x-1);
  irightpix = mod8(x+w);
  imidpix = (w-ileftpix-irightpix) / 8;

  pre1 = xconv[(x-1)&~7] + y80[y];
  orgpre1=pre1;

  // check for overlap ( very horizontally skinny rect )
  if ( (ileftpix+irightpix) > w )
  {
    int mask = startmasks[ileftpix] & endmasks[irightpix];

    WRITE_PORT_UCHAR((PUCHAR)GRA_I,0x08);     // set the mask
    WRITE_PORT_UCHAR((PUCHAR)GRA_D,mask);

    tmppre1 = pre1;
    for ( j = y; j < y+h; j++ )
    {
      a = READ_REGISTER_UCHAR ( vidmem+tmppre1 );
      WRITE_REGISTER_UCHAR ( vidmem+tmppre1, iColor );
      tmppre1 += 80;
    }
    return TRUE;
  }

  if ( ileftpix > 0 )
  {
    // Write left pixels
    WRITE_PORT_UCHAR((PUCHAR)GRA_I,0x08);     // set the mask
    WRITE_PORT_UCHAR((PUCHAR)GRA_D,startmasks[ileftpix]);

    tmppre1 = pre1;
    for ( j = y; j < y+h; j++ )
    {
      a = READ_REGISTER_UCHAR(vidmem + tmppre1);
      WRITE_REGISTER_UCHAR(vidmem + tmppre1, iColor);
      tmppre1 += 80;
    }

    // Prepare new x for the middle
    x = orgx + 8;
  }

  if ( imidpix > 0 )
  {
    midpre1=xconv[x] + y80[y];

    // Set mask to all pixels in byte
    WRITE_PORT_UCHAR((PUCHAR)GRA_I, 0x08);

    WRITE_PORT_UCHAR((PUCHAR)GRA_D, 0xff);

    for ( j = y; j < y+h; j++ )
    {
      memset(vidmem+midpre1, iColor, imidpix); // write middle pixels, no need to read in latch because of the width
      midpre1 += 80;
    }
  }

  x = orgx + w - irightpix;
  pre1 = xconv[x] + y80[y];

  // Write right pixels
  WRITE_PORT_UCHAR((PUCHAR)GRA_I,0x08);     // set the mask bits
  WRITE_PORT_UCHAR((PUCHAR)GRA_D,endmasks[irightpix]);

  for ( j = y; j < y+h; j++ )
  {
    a = READ_REGISTER_UCHAR(vidmem + pre1);
    WRITE_REGISTER_UCHAR(vidmem + pre1, iColor);
    pre1 += 80;
  }

  return TRUE;
}

BOOL VGADDIPaintRgn(SURFOBJ *Surface, CLIPOBJ *ClipRegion, ULONG iColor, MIX Mix,
                    BRUSHINST *BrushInst, POINTL *BrushPoint)
{
   RECT_ENUM RectEnum;
   BOOL EnumMore;

   DPRINT("VGADDIPaintRgn: iMode: %d, iDComplexity: %d\n Color:%d\n", ClipRegion->iMode, ClipRegion->iDComplexity, iColor);
   switch(ClipRegion->iMode) {

      case TC_RECTANGLES:

      /* Rectangular clipping can be handled without enumeration.
         Note that trivial clipping is not possible, since the clipping
         region defines the area to fill */

      if (ClipRegion->iDComplexity == DC_RECT)
      {
		 DPRINT("VGADDIPaintRgn Rect:%d %d %d %d\n", ClipRegion->rclBounds.left, ClipRegion->rclBounds.top, ClipRegion->rclBounds.right, ClipRegion->rclBounds.bottom);
         VGADDIFillSolid(Surface, ClipRegion->rclBounds, iColor);
      } else {
         /* Enumerate all the rectangles and draw them */

         CLIPOBJ_cEnumStart(ClipRegion, FALSE, CT_RECTANGLES, CD_ANY, 0);

         do {
			UINT i;
            EnumMore = CLIPOBJ_bEnum(ClipRegion, sizeof(RectEnum), (PVOID) &RectEnum);
			DPRINT("EnumMore: %d, count: %d\n", EnumMore, RectEnum.c);
			for( i=0; i<RectEnum.c; i++){
		      DPRINT("VGADDI enum Rect:%d %d %d %d\n", RectEnum.arcl[i].left, RectEnum.arcl[i].top, RectEnum.arcl[i].right, RectEnum.arcl[i].bottom);
              VGADDIFillSolid(Surface, RectEnum.arcl[i], iColor);
			}

         } while (EnumMore);
      }

      return(TRUE);

      default:
         return(FALSE);
   }
}



BOOL STDCALL
DrvPaint(IN SURFOBJ *Surface,
	 IN CLIPOBJ *ClipRegion,
	 IN BRUSHOBJ *Brush,
	 IN POINTL *BrushOrigin,
	 IN MIX Mix)
{
   ULONG iSolidColor;

   iSolidColor = Brush->iSolidColor; // FIXME: Realizations and the like

   // If the foreground and background Mixes are the same,
   // (LATER or if there's no brush mask)
   // then see if we can use the solid brush accelerators

   // FIXME: Put in the mix switch below
   // Brush color parameter doesn't matter for these rops
   return(VGADDIPaintRgn(Surface, ClipRegion, iSolidColor, Mix, NULL, BrushOrigin));

   if ((Mix & 0xFF) == ((Mix >> 8) & 0xFF))
   {
      switch (Mix & 0xFF)
      {
         case 0:
            break;

         // FIXME: Implement all these millions of ROPs
         // For now we don't support brushes -- everything is solid

         case R2_MASKNOTPEN:
         case R2_NOTCOPYPEN:
         case R2_XORPEN:
         case R2_MASKPEN:
         case R2_NOTXORPEN:
         case R2_MERGENOTPEN:
         case R2_COPYPEN:
         case R2_MERGEPEN:
         case R2_NOTMERGEPEN:
         case R2_MASKPENNOT:
         case R2_NOTMASKPEN:
         case R2_MERGEPENNOT:

         // Rops that are implicit solid colors
         case R2_NOT:
         case R2_WHITE:
         case R2_BLACK:


  // FIXME: The Paint region belongs HERE

         case R2_NOP:
            return(TRUE);

         default:
            break;
      }
   }

/*
doBitBlt:

   // If VGADDIPaint can't do it, VGADDIBitBlt can.. or it might just loop back
   // here and we have a nice infinite loop

   return( VGADDIBitBlt(Surface, (SURFOBJ *)NULL, (SURFOBJ *)NULL, ClipRegion,
                       (XLATEOBJ *)NULL, &ClipRegion->rclBounds,
                       NULL, (POINTL *)NULL, Brush, BrushOrigin,
                       NULL) ); UNIMPLEMENTED */
}