reactos/reactos/subsys/win32k/eng/surface.c

/*
 * COPYRIGHT:         See COPYING in the top level directory
 * PROJECT:           ReactOS kernel
 * PURPOSE:           GDI Driver Surace Functions
 * FILE:              subsys/win32k/eng/surface.c
 * PROGRAMER:         Jason Filby
 * REVISION HISTORY:
 *                 3/7/1999: Created
 *                 9/11/2000: Updated to handle real pixel packed bitmaps (UPDATE TO DATE COMPLETED)
 * TESTING TO BE DONE:
 * - Create a GDI bitmap with all formats, perform all drawing operations on them, render to VGA surface
 *   refer to \test\microwin\src\engine\devdraw.c for info on correct pixel plotting for various formats
 */

#include <ddk/winddi.h>
#include <win32k/dc.h>
#include "objects.h"

INT BitsPerFormat(ULONG Format)
{
  switch(Format)
  {
    case BMF_1BPP: return 1;
    case BMF_4BPP:
    case BMF_4RLE: return 4;
    case BMF_8BPP:
    case BMF_8RLE: return 8;
    case BMF_16BPP: return 16;
    case BMF_24BPP: return 24;
    case BMF_32BPP: return 32;
    default: return 0;
  }
}

ULONG BitmapFormat(WORD Bits, DWORD Compression)
{
  switch(Compression)
  {
    case BI_RGB:
      switch(Bits)
      {
        case 1: return BMF_1BPP;
        case 4: return BMF_4BPP;
        case 8: return BMF_8BPP;
        case 16: return BMF_16BPP;
        case 24: return BMF_24BPP;
        case 32: return BMF_32BPP;
      }

    case BI_RLE4: return BMF_4RLE;
    case BI_RLE8: return BMF_8RLE;

    default: return 0;
  }
}

VOID InitializeHooks(SURFGDI *SurfGDI)
{
  SurfGDI->BitBlt   = NULL;
  SurfGDI->CopyBits = NULL;
  SurfGDI->CreateDeviceBitmap = NULL;
  SurfGDI->SetPalette = NULL;
  SurfGDI->TransparentBlt = NULL;
}

HBITMAP EngCreateDeviceBitmap(DHSURF dhsurf, SIZEL Size, ULONG Format)
{
  HBITMAP NewBitmap;
  SURFOBJ *SurfObj;

  NewBitmap = EngCreateBitmap(Size, DIB_GetDIBWidthBytes(Size.cx, BitsPerFormat(Format)), Format, 0, NULL);
  SurfObj = (PVOID)AccessUserObject(NewBitmap);
  SurfObj->dhpdev = dhsurf;

  return NewBitmap;
}

HBITMAP EngCreateBitmap(IN SIZEL  Size,
                        IN LONG  Width,
                        IN ULONG  Format,
                        IN ULONG  Flags,
                        IN PVOID  Bits)
{
  HBITMAP NewBitmap;
  SURFOBJ *SurfObj;
  SURFGDI *SurfGDI;

  SurfObj = EngAllocMem(FL_ZERO_MEMORY, sizeof(SURFOBJ), 0);
  SurfGDI = EngAllocMem(FL_ZERO_MEMORY, sizeof(SURFGDI), 0);

  NewBitmap = (PVOID)CreateGDIHandle(SurfGDI, SurfObj);

  InitializeHooks(SurfGDI);

  SurfGDI->BitsPerPixel = BitsPerFormat(Format);
  SurfObj->lDelta = Width;
  SurfObj->cjBits = SurfObj->lDelta * Size.cy;

  if(Bits!=NULL)
  {
    SurfObj->pvBits = Bits;
  } else
  {
    if(Flags & BMF_USERMEM)
    {
      SurfObj->pvBits = EngAllocUserMem(SurfObj->cjBits, 0);
    } else {
      if(Flags & BMF_NOZEROINIT)
      {
        SurfObj->pvBits = EngAllocMem(0, SurfObj->cjBits, 0);
      } else {
        SurfObj->pvBits = EngAllocMem(FL_ZERO_MEMORY, SurfObj->cjBits, 0);
      }
    }
  }

  SurfObj->dhsurf = 0; // device managed surface
  SurfObj->hsurf  = 0;
  SurfObj->sizlBitmap = Size;
  SurfObj->iBitmapFormat = Format;
  SurfObj->iType = STYPE_BITMAP;

  // Use flags to determine bitmap type -- TOP_DOWN or whatever

  return NewBitmap;
}

HSURF EngCreateDeviceSurface(DHSURF dhsurf, SIZEL Size, ULONG Format)
{
  HSURF   NewSurface;
  SURFOBJ *SurfObj;
  SURFGDI *SurfGDI;

  SurfObj = EngAllocMem(FL_ZERO_MEMORY, sizeof(SURFOBJ), 0);
  SurfGDI = EngAllocMem(FL_ZERO_MEMORY, sizeof(SURFGDI), 0);

  NewSurface = (HSURF)CreateGDIHandle(SurfGDI, SurfObj);

  InitializeHooks(SurfGDI);

  SurfGDI->BitsPerPixel = BitsPerFormat(Format);
  SurfObj->dhsurf = dhsurf;
  SurfObj->hsurf  = dhsurf; // FIXME: Is this correct??
  SurfObj->sizlBitmap = Size;
  SurfObj->iBitmapFormat = Format;
  SurfObj->lDelta = DIB_GetDIBWidthBytes(Size.cx, BitsPerFormat(Format));
  SurfObj->iType = STYPE_DEVICE;

  return NewSurface;
}

PFN DriverFunction(DRVENABLEDATA *DED, ULONG DriverFunc)
{
  ULONG i;

  for(i=0; i<DED->c; i++)
  {
    if(DED->pdrvfn[i].iFunc == DriverFunc)
      return DED->pdrvfn[i].pfn;
  }
  return NULL;
}

BOOL EngAssociateSurface(HSURF Surface, HDEV Dev, ULONG Hooks)
{
  SURFOBJ *SurfObj;
  SURFGDI *SurfGDI;

  PDC Dc = (PDC)Dev;

  SurfGDI = (PVOID)AccessInternalObject(Surface);
  SurfObj = (PVOID)AccessUserObject(Surface);

  // Associate the hdev
  SurfObj->hdev = Dev;

  // Hook up specified functions
  if(Hooks & HOOK_BITBLT)            SurfGDI->BitBlt            = Dc->DriverFunctions.BitBlt;
  if(Hooks & HOOK_TRANSPARENTBLT)    SurfGDI->TransparentBlt	= Dc->DriverFunctions.TransparentBlt;
  if(Hooks & HOOK_STRETCHBLT)        SurfGDI->StretchBlt        = Dc->DriverFunctions.StretchBlt;
  if(Hooks & HOOK_TEXTOUT)           SurfGDI->TextOut           = Dc->DriverFunctions.TextOut;
  if(Hooks & HOOK_PAINT)             SurfGDI->Paint             = Dc->DriverFunctions.Paint;
  if(Hooks & HOOK_STROKEPATH)        SurfGDI->StrokePath        = Dc->DriverFunctions.StrokePath;
  if(Hooks & HOOK_FILLPATH)          SurfGDI->FillPath          = Dc->DriverFunctions.FillPath;
  if(Hooks & HOOK_STROKEANDFILLPATH) SurfGDI->StrokeAndFillPath = Dc->DriverFunctions.StrokeAndFillPath;
  if(Hooks & HOOK_LINETO)            SurfGDI->LineTo            = Dc->DriverFunctions.LineTo;
  if(Hooks & HOOK_COPYBITS)          SurfGDI->CopyBits          = Dc->DriverFunctions.CopyBits;
  if(Hooks & HOOK_SYNCHRONIZE)       SurfGDI->Synchronize       = Dc->DriverFunctions.Synchronize;
  if(Hooks & HOOK_SYNCHRONIZEACCESS) SurfGDI->SynchronizeAccess = TRUE;

  SurfGDI->CreateDeviceBitmap = Dc->DriverFunctions.CreateDeviceBitmap;
  SurfGDI->SetPalette = Dc->DriverFunctions.SetPalette;
  SurfGDI->MovePointer = Dc->DriverFunctions.MovePointer;
  SurfGDI->SetPointerShape = Dc->DriverFunctions.SetPointerShape;

  return TRUE;
}

BOOL EngDeleteSurface(HSURF Surface)
{
  SURFOBJ *SurfObj;
  SURFGDI *SurfGDI;

  SurfGDI = (SURFGDI*)AccessInternalObject(Surface);
  SurfObj = (SURFOBJ*)AccessUserObject(Surface);

  EngFreeMem(SurfGDI);
  EngFreeMem(SurfObj);
  FreeGDIHandle(Surface);

  return TRUE;
}

SURFOBJ *EngLockSurface(HSURF Surface)
{
  // FIXME: Call GDI_LockObject (see subsys/win32k/objects/gdi.c)
  return (SURFOBJ*)AccessUserObject(Surface);
}