dd.c

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/*
 * ReactOS Generic Framebuffer display driver directdraw interface
 *
 * Copyright (C) 2006 Magnus Olsen
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/* Here we put in all 2d api for directdraw and redirect some of them to GDI api */

#include "framebuf.h"

DWORD CALLBACK
DdCanCreateSurface(LPDDHAL_CANCREATESURFACEDATA pccsd)
{

     /* We do not support 3d buffer so we fail here */
     if ((pccsd->lpDDSurfaceDesc->ddsCaps.dwCaps & DDSCAPS_ZBUFFER) &&
        (pccsd->lpDDSurfaceDesc->ddsCaps.dwCaps & DDSCAPS_VIDEOMEMORY))
     {
        pccsd->ddRVal = DDERR_INVALIDPIXELFORMAT;
        return DDHAL_DRIVER_HANDLED;
     }


     /* Check if another pixel format or not, we fail for now */
     if (pccsd->bIsDifferentPixelFormat)
     {
        /* check the fourcc diffent FOURCC, but we only support BMP for now */
        //if(pccsd->lpDDSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_FOURCC)
        //{
        //  /* We do not support other pixel format */
        //  switch (pccsd->lpDDSurfaceDesc->ddpfPixelFormat.dwFourCC)
        //  {
        //      default:
        //          pccsd->ddRVal = DDERR_INVALIDPIXELFORMAT;
        //          return DDHAL_DRIVER_HANDLED;
        //  }
        //}
        // /* check the texture support, we do not support testure for now */
        //else if((pccsd->lpDDSurfaceDesc->ddsCaps.dwCaps & DDSCAPS_TEXTURE))
        //{
        //  /* We do not support texture surface */
        //  pccsd->ddRVal = DDERR_INVALIDPIXELFORMAT;
        //  return DDHAL_DRIVER_HANDLED;
        //}

        /* Fail */
        pccsd->ddRVal = DDERR_INVALIDPIXELFORMAT;
        return DDHAL_DRIVER_HANDLED;
    }

     pccsd->ddRVal = DD_OK;
     return DDHAL_DRIVER_HANDLED;
}

DWORD CALLBACK
DdCreateSurface(PDD_CREATESURFACEDATA pcsd)
{
    int i;

    if (pcsd->dwSCnt < 1)
    {
        pcsd->ddRVal = DDERR_GENERIC;
        return DDHAL_DRIVER_NOTHANDLED;
    }


    for (i=0; i<(int)pcsd->dwSCnt; i++)
    {
        pcsd->lplpSList[i]->lpGbl->lPitch = (DWORD)(pcsd->lplpSList[i]->lpGbl->wWidth *
                                            (pcsd->lplpSList[i]->lpGbl->ddpfSurface.dwRGBBitCount / 8));

        pcsd->lplpSList[i]->lpGbl->dwBlockSizeX = pcsd->lplpSList[i]->lpGbl->lPitch *
                                                  (DWORD)(pcsd->lplpSList[i]->lpGbl->wHeight);

        pcsd->lplpSList[i]->lpGbl->dwBlockSizeY = 1;

        if ( pcsd->lplpSList[i] ->ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
        {
            /* We maybe should alloc it with EngAlloc
               for now we trusting ddraw alloc it        */
            pcsd->lplpSList[i]->lpGbl->fpVidMem = 0;
        }
        else
        {

            /* We maybe should alloc it with EngAlloc
               for now we trusting ddraw alloc it        */
            pcsd->lplpSList[i]->lpGbl->fpVidMem = DDHAL_PLEASEALLOC_BLOCKSIZE;
        }

        pcsd->lpDDSurfaceDesc->lPitch = pcsd->lplpSList[i]->lpGbl->lPitch;
        pcsd->lpDDSurfaceDesc->dwFlags |= DDSD_PITCH;

    } // for i



    pcsd->ddRVal = DD_OK;
    return DDHAL_DRIVER_HANDLED;
}