view src/video/photon/SDL_ph_image.c @ 910:4ab6d1fd028f

Date: Sat, 26 Jun 2004 14:58:42 +0300 From: "Mike Gorchak" Subject: QNX 6.3 fixes for SDL Sam, I've added new OpenGL framework for SDL, which appeared in the new QNX version - 6.3. I've leave compatibility with previous QNX versions. And I've moved all GL specific functions to the separate module, like it done for the other platforms. SDL is now ready for the QNX 6.3 :)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Jul 2004 19:46:38 +0000
parents 05c551e5bc64
children c9b51268668f
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

#include <stdlib.h>

#include <Ph.h>
#include <photon/Pg.h>

#include "SDL.h"
#include "SDL_error.h"
#include "SDL_endian.h"
#include "SDL_video.h"
#include "SDL_pixels_c.h"
#include "SDL_ph_video.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_gl.h"

int ph_SetupImage(_THIS, SDL_Surface *screen)
{
    PgColor_t* palette=NULL;
    int type=0;
    int bpp;
    
    bpp=screen->format->BitsPerPixel;

    /* Determine image type */
    switch(bpp)
    {
        case 8:{
            type = Pg_IMAGE_PALETTE_BYTE;
        }
        break;
        case 15:{
            type = Pg_IMAGE_DIRECT_555; 
        }
        break;
        case 16:{
            type = Pg_IMAGE_DIRECT_565; 
        }
        break;
        case 24:{
            type = Pg_IMAGE_DIRECT_888;
        }
        break;
        case 32:{
            type = Pg_IMAGE_DIRECT_8888;
        }
        break;
        default:{
            SDL_SetError("ph_SetupImage(): unsupported bpp=%d !\n", bpp);
            return -1;
        }
        break;
    }

    /* palette emulation code */
    if ((bpp==8) && (desktoppal==SDLPH_PAL_EMULATE))
    {
        /* creating image palette */
        palette=malloc(_Pg_MAX_PALETTE*sizeof(PgColor_t));
        if (palette==NULL)
        {
            SDL_SetError("ph_SetupImage(): can't allocate memory for palette !\n");
            return -1;
        }
        PgGetPalette(palette);

        /* using shared memory for speed (set last param to 1) */
        if ((SDL_Image = PhCreateImage(NULL, screen->w, screen->h, type, palette, _Pg_MAX_PALETTE, 1)) == NULL)
        {
            SDL_SetError("ph_SetupImage(): PhCreateImage() failed for bpp=8 !\n");
            free(palette);
            return -1;
        }
    }
    else
    {
        /* using shared memory for speed (set last param to 1) */
        if ((SDL_Image = PhCreateImage(NULL, screen->w, screen->h, type, NULL, 0, 1)) == NULL)
        {
            SDL_SetError("ph_SetupImage(): PhCreateImage() failed for bpp=%d !\n", bpp);
            return -1;
        }
    }

    screen->pixels = SDL_Image->image;
    screen->pitch = SDL_Image->bpl;

    this->UpdateRects = ph_NormalUpdate;

    return 0;
}

int ph_SetupOCImage(_THIS, SDL_Surface *screen)
{
    int type = 0;
    int bpp;

    OCImage.flags = screen->flags;
    
    bpp=screen->format->BitsPerPixel;

    /* Determine image type */
    switch(bpp)
    {
        case 8: {
                    type = Pg_IMAGE_PALETTE_BYTE;
                }
                break;
        case 15:{
                    type = Pg_IMAGE_DIRECT_555; 
		}
		break;
        case 16:{
                    type = Pg_IMAGE_DIRECT_565; 
                }
                break;
        case 24:{
                    type = Pg_IMAGE_DIRECT_888;
                }
                break;
        case 32:{
                    type = Pg_IMAGE_DIRECT_8888;
                }
                break;
        default:{
                    SDL_SetError("ph_SetupOCImage(): unsupported bpp=%d !\n", bpp);
                    return -1;
                }
                break;
    }

    /* Currently offscreen contexts with the same bit depth as display bpp only can be created */
    OCImage.offscreen_context = PdCreateOffscreenContext(0, screen->w, screen->h, Pg_OSC_MEM_PAGE_ALIGN);

    if (OCImage.offscreen_context == NULL)
    {
        SDL_SetError("ph_SetupOCImage(): PdCreateOffscreenContext() function failed !\n");
        return -1;
    }

    screen->pitch = OCImage.offscreen_context->pitch;

    OCImage.dc_ptr = (unsigned char *)PdGetOffscreenContextPtr(OCImage.offscreen_context);

    if (OCImage.dc_ptr == NULL)
    {
        SDL_SetError("ph_SetupOCImage(): PdGetOffscreenContextPtr function failed !\n");
        PhDCRelease(OCImage.offscreen_context);
        return -1;
    }

    OCImage.FrameData0 = OCImage.dc_ptr;
    OCImage.CurrentFrameData = OCImage.FrameData0;
    OCImage.current = 0;

    PhDCSetCurrent(OCImage.offscreen_context);

    screen->pixels = OCImage.CurrentFrameData;

    this->UpdateRects = ph_OCUpdate;

    return 0;
}

int ph_SetupFullScreenImage(_THIS, SDL_Surface* screen)
{
    OCImage.flags = screen->flags;

    /* Begin direct and fullscreen mode */
    if (!ph_EnterFullScreen(this, screen, PH_ENTER_DIRECTMODE))
    {
        return -1;
    }

    /* store palette for fullscreen */
    if ((screen->format->BitsPerPixel==8) && (desktopbpp!=8))
    {
        PgGetPalette(savedpal);
        PgGetPalette(syspalph);
    }

    OCImage.offscreen_context = PdCreateOffscreenContext(0, 0, 0, Pg_OSC_MAIN_DISPLAY | Pg_OSC_MEM_PAGE_ALIGN | Pg_OSC_CRTC_SAFE);
    if (OCImage.offscreen_context == NULL)
    {
        SDL_SetError("ph_SetupFullScreenImage(): PdCreateOffscreenContext() function failed !\n");
        return -1;
    }
    
    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF)
    {
        OCImage.offscreen_backcontext = PdDupOffscreenContext(OCImage.offscreen_context, Pg_OSC_MEM_PAGE_ALIGN | Pg_OSC_CRTC_SAFE);
        if (OCImage.offscreen_backcontext == NULL)
        {
            SDL_SetError("ph_SetupFullScreenImage(): PdCreateOffscreenContext(back) function failed !\n");
            return -1;
        }
    }

    OCImage.FrameData0 = (unsigned char *)PdGetOffscreenContextPtr(OCImage.offscreen_context);
    if (OCImage.FrameData0 == NULL)
    {
        SDL_SetError("ph_SetupFullScreenImage(): PdGetOffscreenContextPtr() function failed !\n");
        ph_DestroyImage(this, screen);
        return -1;
    }

    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF)
    {
        OCImage.FrameData1 = (unsigned char *)PdGetOffscreenContextPtr(OCImage.offscreen_backcontext);
        if (OCImage.FrameData1 == NULL)
        {
            SDL_SetError("ph_SetupFullScreenImage(back): PdGetOffscreenContextPtr() function failed !\n");
            ph_DestroyImage(this, screen);
            return -1;
        }
    }

    /* wait for the hardware */
    PgFlush();
    PgWaitHWIdle();

    if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF)
    {
        OCImage.current = 0;
        PhDCSetCurrent(OCImage.offscreen_context);
        screen->pitch = OCImage.offscreen_context->pitch;
        screen->pixels = OCImage.FrameData0;
        
        /* emulate 640x400 videomode */
        if (videomode_emulatemode==1)
        {
           int i;
           
           for (i=0; i<40; i++)
           {
              memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           for (i=440; i<480; i++)
           {
              memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           screen->pixels+=screen->pitch*40;
        }
        PgSwapDisplay(OCImage.offscreen_backcontext, 0);
    }
    else
    {
        OCImage.current = 0;
        PhDCSetCurrent(OCImage.offscreen_context);
        screen->pitch = OCImage.offscreen_context->pitch;
        screen->pixels = OCImage.FrameData0;

        /* emulate 640x400 videomode */
        if (videomode_emulatemode==1)
        {
           int i;
           
           for (i=0; i<40; i++)
           {
              memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           for (i=440; i<480; i++)
           {
              memset(screen->pixels+screen->pitch*i, 0x00, screen->pitch);
           }
           screen->pixels+=screen->pitch*40;
        }
    }

    this->UpdateRects = ph_OCDCUpdate;

    /* wait for the hardware */
    PgFlush();
    PgWaitHWIdle();

    return 0;
}

#ifdef HAVE_OPENGL

int ph_SetupOpenGLImage(_THIS, SDL_Surface* screen)
{
    this->UpdateRects = ph_OpenGLUpdate;
    screen->pixels=NULL;
    screen->pitch=NULL;

    #if (_NTO_VERSION >= 630)
        if ((screen->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN)
        {
            if (!ph_EnterFullScreen(this, screen, PH_IGNORE_DIRECTMODE))
            {
                screen->flags &= ~SDL_FULLSCREEN;
                return -1;
            }
        }
    #endif /* 6.3.0 */

    if (ph_SetupOpenGLContext(this, screen->w, screen->h, screen->format->BitsPerPixel, screen->flags)!=0)
    {
        screen->flags &= ~SDL_OPENGL;
        return -1;
    }
   
    return 0;
}

#endif /* HAVE_OPENGL */

void ph_DestroyImage(_THIS, SDL_Surface* screen)
{

#ifdef HAVE_OPENGL
    if ((screen->flags & SDL_OPENGL)==SDL_OPENGL)
    {
        if (oglctx)
        {
            #if (_NTO_VERSION < 630)
                PhDCSetCurrent(NULL);
                PhDCRelease(oglctx);
            #else
                qnxgl_context_destroy(oglctx);
                qnxgl_buffers_destroy(oglbuffers);
                qnxgl_finish();
            #endif /* 6.3.0 */
            oglctx=NULL;
            oglbuffers=NULL;
            oglflags=0;
            oglbpp=0;
        }

        #if (_NTO_VERSION >= 630)
            if (currently_fullscreen)
            {
                ph_LeaveFullScreen(this);
            }
        #endif /* 6.3.0 */

        return;
    }
#endif /* HAVE_OPENGL */

    if (currently_fullscreen)
    {
        /* if we right now in 8bpp fullscreen we must release palette */
        if ((screen->format->BitsPerPixel==8) && (desktopbpp!=8))
        {
            PgSetPalette(syspalph, 0, -1, 0, 0, 0);
            PgSetPalette(savedpal, 0, 0, _Pg_MAX_PALETTE, Pg_PALSET_GLOBAL | Pg_PALSET_FORCE_EXPOSE, 0);
            PgFlush();
        }
        ph_LeaveFullScreen(this);
    }

    if (OCImage.offscreen_context != NULL)
    {
        PhDCRelease(OCImage.offscreen_context);
        OCImage.offscreen_context = NULL;
        OCImage.FrameData0 = NULL;
    }
    if (OCImage.offscreen_backcontext != NULL)
    {
        PhDCRelease(OCImage.offscreen_backcontext);
        OCImage.offscreen_backcontext = NULL;
        OCImage.FrameData1 = NULL;
    }
    OCImage.CurrentFrameData = NULL;

    if (SDL_Image)
    {
        /* if palette allocated, free it */
        if (SDL_Image->palette)
        {
            free(SDL_Image->palette);
        }
        PgShmemDestroy(SDL_Image->image);
        free(SDL_Image);
    }

    /* Must be zeroed everytime */
    SDL_Image = NULL;

    if (screen)
    {
        screen->pixels = NULL;
    }
}

int ph_UpdateHWInfo(_THIS)
{
    PgVideoModeInfo_t vmode;
    PgHWCaps_t hwcaps;

    /* Update video ram amount */
    if (PgGetGraphicsHWCaps(&hwcaps) < 0)
    {
        SDL_SetError("ph_UpdateHWInfo(): GetGraphicsHWCaps() function failed !\n");
        return -1;
    }
    this->info.video_mem=hwcaps.currently_available_video_ram/1024;

    /* obtain current mode capabilities */
    if (PgGetVideoModeInfo(hwcaps.current_video_mode, &vmode) < 0)
    {
        SDL_SetError("ph_UpdateHWInfo(): GetVideoModeInfo() function failed !\n");
        return -1;
    }

    if ((vmode.mode_capabilities1 & PgVM_MODE_CAP1_OFFSCREEN) == PgVM_MODE_CAP1_OFFSCREEN)
    {
        /* this is a special test for drivers which tries to lie about offscreen capability */
        if (hwcaps.currently_available_video_ram!=0)
        {
           this->info.hw_available = 1;
        }
        else
        {
           this->info.hw_available = 0;
        }
    }
    else
    {
        this->info.hw_available = 0;
    }

    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_RECTANGLE) == PgVM_MODE_CAP2_RECTANGLE)
    {
        this->info.blit_fill = 1;
    }
    else
    {
        this->info.blit_fill = 0;
    }

    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_BITBLT) == PgVM_MODE_CAP2_BITBLT)
    {
        this->info.blit_hw = 1;
    }
    else
    {
        this->info.blit_hw = 0;
    }

    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_ALPHA_BLEND) == PgVM_MODE_CAP2_ALPHA_BLEND)
    {
        this->info.blit_hw_A = 1;
    }
    else
    {
        this->info.blit_hw_A = 0;
    }
    
    if ((vmode.mode_capabilities2 & PgVM_MODE_CAP2_CHROMA) == PgVM_MODE_CAP2_CHROMA)
    {
        this->info.blit_hw_CC = 1;
    }
    else
    {
        this->info.blit_hw_CC = 0;
    }
    
    return 0;
}

int ph_SetupUpdateFunction(_THIS, SDL_Surface* screen, Uint32 flags)
{
    int setupresult=-1;

    ph_DestroyImage(this, screen);
    
#ifdef HAVE_OPENGL
    if ((flags & SDL_OPENGL)==SDL_OPENGL)
    {
        setupresult=ph_SetupOpenGLImage(this, screen);
    }
    else
    {
#endif /* HAVE_OPENGL */
       if ((flags & SDL_FULLSCREEN)==SDL_FULLSCREEN)
       {
           setupresult=ph_SetupFullScreenImage(this, screen);
       }
       else
       {
          if ((flags & SDL_HWSURFACE)==SDL_HWSURFACE)
          {
              setupresult=ph_SetupOCImage(this, screen);
          }
          else
          {
              setupresult=ph_SetupImage(this, screen);
          }
       }
#ifdef HAVE_OPENGL
    }
#endif /* HAVE_OPENGL */
    if (setupresult!=-1)
    {
       ph_UpdateHWInfo(this);
    }
    
    return setupresult;
}

int ph_AllocHWSurface(_THIS, SDL_Surface* surface)
{
    PgHWCaps_t hwcaps;

    if (surface->hwdata!=NULL)
    {
       SDL_SetError("ph_AllocHWSurface(): hwdata already exists!\n");
       return -1;
    }
    surface->hwdata=malloc(sizeof(struct private_hwdata));
    memset(surface->hwdata, 0x00, sizeof(struct private_hwdata));
    surface->hwdata->offscreenctx=PdCreateOffscreenContext(0, surface->w, surface->h, Pg_OSC_MEM_PAGE_ALIGN);
    if (surface->hwdata->offscreenctx == NULL)
    {
        SDL_SetError("ph_AllocHWSurface(): PdCreateOffscreenContext() function failed !\n");
        return -1;
    }
    surface->pixels=PdGetOffscreenContextPtr(surface->hwdata->offscreenctx);
    if (surface->pixels==NULL)
    {
        PhDCRelease(surface->hwdata->offscreenctx);
        SDL_SetError("ph_AllocHWSurface(): PdGetOffscreenContextPtr() function failed !\n");
        return -1;
    }
    surface->pitch=surface->hwdata->offscreenctx->pitch;
    surface->flags|=SDL_HWSURFACE;
    surface->flags|=SDL_PREALLOC;
    
#if 0 /* FIXME */
    /* create simple offscreen lock */
    surface->hwdata->crlockparam.flags=0;
    if (PdCreateOffscreenLock(surface->hwdata->offscreenctx, &surface->hwdata->crlockparam)!=EOK)
    {
        PhDCRelease(surface->hwdata->offscreenctx);
        SDL_SetError("ph_AllocHWSurface(): Can't create offscreen lock !\n");
        return -1;
    }
#endif /* 0 */

    /* Update video ram amount */
    if (PgGetGraphicsHWCaps(&hwcaps) < 0)
    {
        PdDestroyOffscreenLock(surface->hwdata->offscreenctx);
        PhDCRelease(surface->hwdata->offscreenctx);
        SDL_SetError("ph_AllocHWSurface(): GetGraphicsHWCaps() function failed !\n");
        return -1;
    }
    this->info.video_mem=hwcaps.currently_available_video_ram/1024;

    return 0;
}

void ph_FreeHWSurface(_THIS, SDL_Surface* surface)
{
    PgHWCaps_t hwcaps;

    if (surface->hwdata==NULL)
    {
       SDL_SetError("ph_FreeHWSurface(): no hwdata!\n");
       return;
    }
    if (surface->hwdata->offscreenctx == NULL)
    {
       SDL_SetError("ph_FreeHWSurface(): no offscreen context to delete!\n");
       return;
    }

#if 0 /* FIXME */
    /* unlock the offscreen context if it has been locked before destroy it */
    if (PdIsOffscreenLocked(surface->hwdata->offscreenctx)==Pg_OSC_LOCKED)
    {
       PdUnlockOffscreen(surface->hwdata->offscreenctx);
    }

    PdDestroyOffscreenLock(surface->hwdata->offscreenctx);
#endif /* 0 */

    PhDCRelease(surface->hwdata->offscreenctx);
    
    free(surface->hwdata);
    surface->hwdata=NULL;

    /* Update video ram amount */
    if (PgGetGraphicsHWCaps(&hwcaps) < 0)
    {
        SDL_SetError("ph_FreeHWSurface(): GetGraphicsHWCaps() function failed !\n");
        return;
    }
    this->info.video_mem=hwcaps.currently_available_video_ram/1024;

    return;
}

int ph_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
{
   if ((src->hwdata==NULL) && (src != this->screen))
   {
      SDL_SetError("ph_CheckHWBlit(): Source surface haven't hardware specific data.\n");
      src->flags&=~SDL_HWACCEL;
      return -1;
   }
   if ((src->flags & SDL_HWSURFACE) != SDL_HWSURFACE)
   {
      SDL_SetError("ph_CheckHWBlit(): Source surface isn't a hardware surface.\n");
      src->flags&=~SDL_HWACCEL;
      return -1;
   }

   if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY)
   {
       if (this->info.blit_hw_CC!=1)
       {
           src->flags&=~SDL_HWACCEL;
           src->map->hw_blit=NULL;
           return -1;
       }
   }

   if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA)
   {
       if (this->info.blit_hw_A!=1)
       {
           src->flags&=~SDL_HWACCEL;
           src->map->hw_blit=NULL;
           return -1;
       }
   }

   src->flags|=SDL_HWACCEL;
   src->map->hw_blit = ph_HWAccelBlit;

   return 1;
}

PgColor_t ph_ExpandColor(_THIS, SDL_Surface* surface, Uint32 color)
{
    Uint32 truecolor;

    /* Photon API accepts true colors only during hw filling operations */
    switch(surface->format->BitsPerPixel)
    {
       case 8:
            {
                if ((surface->format->palette) && (color<=surface->format->palette->ncolors))
                {
                    truecolor=PgRGB(surface->format->palette->colors[color].r,
                                    surface->format->palette->colors[color].g,
                                    surface->format->palette->colors[color].b);
                }
                else
                {
                    SDL_SetError("ph_ExpandColor(): Color out of range for the 8bpp mode !\n");
                    return 0xFFFFFFFFUL;
                }
            }
            break;
       case 15: 
            {
                truecolor = ((color & 0x00007C00UL) << 9) |   /* R */
                            ((color & 0x000003E0UL) << 6) |   /* G */
                            ((color & 0x0000001FUL) << 3) |   /* B */
                            ((color & 0x00007000UL) << 4) |   /* R compensation */
                            ((color & 0x00000380UL) << 1) |   /* G compensation */
                            ((color & 0x0000001CUL) >> 2);    /* B compensation */
            }
            break;
       case 16: 
            {
                truecolor = ((color & 0x0000F800UL) << 8) |   /* R */
                            ((color & 0x000007E0UL) << 5) |   /* G */
                            ((color & 0x0000001FUL) << 3) |   /* B */
                            ((color & 0x0000E000UL) << 3) |   /* R compensation */
                            ((color & 0x00000600UL) >> 1) |   /* G compensation */
                            ((color & 0x0000001CUL) >> 2);    /* B compensation */

            }
            break;
       case 24: 
            {
                truecolor=color & 0x00FFFFFFUL;
            }
            break;
       case 32: 
            {
                truecolor=color;
            }
            break;
       default:
            {
                SDL_SetError("ph_ExpandColor(): Unsupported depth for the hardware operations !\n");
                return 0xFFFFFFFFUL;
            }
    }

    return truecolor;
}

int ph_FillHWRect(_THIS, SDL_Surface* surface, SDL_Rect* rect, Uint32 color)
{
    PgColor_t oldcolor;
    Uint32 truecolor;
    int ydisp=0;

    if (this->info.blit_fill!=1)
    {
       return -1;
    }

    truecolor=ph_ExpandColor(this, surface, color);
    if (truecolor==0xFFFFFFFFUL)
    {
        return -1;
    }

    oldcolor=PgSetFillColor(truecolor);

    /* 640x400 videomode emulation */
    if (videomode_emulatemode==1)
    {
        ydisp+=40;
    }

    PgDrawIRect(rect->x, rect->y+ydisp, rect->w+rect->x-1, rect->h+rect->y+ydisp-1, Pg_DRAW_FILL);
    PgSetFillColor(oldcolor);
    PgFlush();
    PgWaitHWIdle();

    return 0;
}

int ph_FlipHWSurface(_THIS, SDL_Surface* screen)
{
    PhArea_t farea;

    if ((screen->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN)
    {
        /* flush all drawing ops before blitting */
        PgFlush();
        PgWaitHWIdle();

        farea.pos.x=0;
        farea.pos.y=0;
        farea.size.w=screen->w;
        farea.size.h=screen->h;

        /* emulate 640x400 videomode */
        if (videomode_emulatemode==1)
        {
            farea.pos.y+=40;
        }

        PgContextBlitArea(OCImage.offscreen_context, &farea, OCImage.offscreen_backcontext, &farea);

        /* flush the blitting */
        PgFlush();
        PgWaitHWIdle();
    }
    return 0;
}

int ph_LockHWSurface(_THIS, SDL_Surface* surface)
{

#if 0 /* FIXME */
    int lockresult;

    if (surface->hwdata == NULL)
    {
        return;
    }

    surface->hwdata->lockparam.flags=0;
    surface->hwdata->lockparam.time_out=NULL;
    lockresult=PdLockOffscreen(surface->hwdata->offscreenctx, &surface->hwdata->lockparam);

    switch (lockresult)
    {
       case EOK:
                 break;
       case Pg_OSC_LOCK_DEADLOCK: 
                 SDL_SetError("ph_LockHWSurface(): Deadlock detected !\n");
                 return -1;
       case Pg_OSC_LOCK_INVALID:
                 SDL_SetError("ph_LockHWSurface(): Lock invalid !\n");
                 return -1;
       default:
                 SDL_SetError("ph_LockHWSurface(): Can't lock the surface !\n");
                 return -1;
    }
#endif /* 0 */

    return 0;
}

void ph_UnlockHWSurface(_THIS, SDL_Surface* surface)
{

#if 0 /* FIXME */
    int unlockresult;

    if ((surface == NULL) || (surface->hwdata == NULL))
    {
        return;
    }

    if (PdIsOffscreenLocked(surface->hwdata->offscreenctx)==Pg_OSC_LOCKED)
    {
        unlockresult=PdUnlockOffscreen(surface->hwdata->offscreenctx);
    }
#endif /* 0 */

    return;
}

int ph_HWAccelBlit(SDL_Surface* src, SDL_Rect* srcrect, SDL_Surface* dst, SDL_Rect* dstrect)
{
    SDL_VideoDevice* this=current_video;
    PhArea_t srcarea;
    PhArea_t dstarea;
    int ydisp=0;

    /* 640x400 videomode emulation */
    if (videomode_emulatemode==1)
    {
       ydisp+=40;
    }

    srcarea.pos.x=srcrect->x;
    srcarea.pos.y=srcrect->y;
    srcarea.size.w=srcrect->w;
    srcarea.size.h=srcrect->h;

    dstarea.pos.x=dstrect->x;
    dstarea.pos.y=dstrect->y;
    dstarea.size.w=dstrect->w;
    dstarea.size.h=dstrect->h;

    if (((src == this->screen) || (src->hwdata!=NULL)) && ((dst == this->screen) || (dst->hwdata!=NULL)))
    {
        if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY)
        {
            ph_SetHWColorKey(this, src, src->format->colorkey);
            PgChromaOn();
        }

        if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA)
        {
            ph_SetHWAlpha(this, src, src->format->alpha);
            PgAlphaOn();
        }

        if (dst == this->screen)
        {
            if (src == this->screen)
            {
                /* blitting from main screen to main screen */
                dstarea.pos.y+=ydisp;
                srcarea.pos.y+=ydisp;
                PgContextBlitArea(OCImage.offscreen_context, &srcarea, OCImage.offscreen_context, &dstarea);
            }
            else
            {
                /* blitting from offscreen to main screen */
                dstarea.pos.y+=ydisp;
                PgContextBlitArea(src->hwdata->offscreenctx, &srcarea, OCImage.offscreen_context, &dstarea);
            }
        }
        else
        {
            if (src == this->screen)
            {
                /* blitting from main screen to offscreen */
                srcarea.pos.y+=ydisp;
                PgContextBlitArea(OCImage.offscreen_context, &srcarea, dst->hwdata->offscreenctx, &dstarea);
            }
            else
            {
                /* blitting offscreen to offscreen */
                PgContextBlitArea(src->hwdata->offscreenctx, &srcarea, dst->hwdata->offscreenctx, &dstarea);
            }
        }

        if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA)
        {
            PgAlphaOff();
        }

        if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY)
        {
            PgChromaOff();
        }
    }
    else
    {
        SDL_SetError("ph_HWAccelBlit(): Source or target surface is not a hardware surface !\n");
        return -1;
    }

    PgFlush();
    PgWaitHWIdle();

    return 0;
}

int ph_SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
{
    if (this->info.blit_hw_CC!=1)
    {
       return -1;
    }

    if (surface->hwdata!=NULL)
    {
        surface->hwdata->colorkey=ph_ExpandColor(this, surface, key);
        if (surface->hwdata->colorkey==0xFFFFFFFFUL)
        {
            return -1;
        }
    }
    PgSetChroma(surface->hwdata->colorkey, Pg_CHROMA_SRC_MATCH | Pg_CHROMA_NODRAW);

    return 0;
}

int ph_SetHWAlpha(_THIS, SDL_Surface* surface, Uint8 alpha)
{
    if (this->info.blit_hw_A!=1)
    {
       return -1;
    }

    PgSetAlphaBlend(NULL, alpha);

    return 0;
}

#ifdef HAVE_OPENGL
void ph_OpenGLUpdate(_THIS, int numrects, SDL_Rect* rects)
{
   this->GL_SwapBuffers(this);
   
   return;
}
#endif /* HAVE_OPENGL */

void ph_NormalUpdate(_THIS, int numrects, SDL_Rect *rects)
{
    PhPoint_t ph_pos;
    PhRect_t ph_rect;
    int i;

    for (i=0; i<numrects; ++i) 
    {
    	if (rects[i].w==0) /* Clipped? dunno why but this occurs sometime. */
        { 
            continue;
        }

    	if (rects[i].h==0) /* Clipped? dunno why but this occurs sometime. */
        { 
            continue;
        }

        ph_pos.x = rects[i].x;
        ph_pos.y = rects[i].y;
        ph_rect.ul.x = rects[i].x;
        ph_rect.ul.y = rects[i].y;
        ph_rect.lr.x = rects[i].x + rects[i].w;
        ph_rect.lr.y = rects[i].y + rects[i].h;

        if (PgDrawPhImageRectmx(&ph_pos, SDL_Image, &ph_rect, 0) < 0)
        {
            SDL_SetError("ph_NormalUpdate(): PgDrawPhImageRectmx failed!\n");
            return;
        }
    }

    if (PgFlush() < 0)
    {
    	SDL_SetError("ph_NormalUpdate(): PgFlush() function failed!\n");
    }
}

void ph_OCUpdate(_THIS, int numrects, SDL_Rect *rects)
{
    int i;

    PhPoint_t zero = {0, 0};
    PhArea_t src_rect;
    PhArea_t dest_rect;

    PgSetTranslation(&zero, 0);
    PgSetRegion(PtWidgetRid(window));
    PgSetClipping(0, NULL);

    PgFlush();
    PgWaitHWIdle();

    for (i=0; i<numrects; ++i)
    {
        if (rects[i].w == 0)  /* Clipped? */
        {
            continue;
        }

        if (rects[i].h == 0)  /* Clipped? */
        {
            continue;
        }
        
        src_rect.pos.x=rects[i].x;
        src_rect.pos.y=rects[i].y;
        dest_rect.pos.x=rects[i].x;
        dest_rect.pos.y=rects[i].y;

        src_rect.size.w=rects[i].w;
        src_rect.size.h=rects[i].h;
        dest_rect.size.w=rects[i].w;
        dest_rect.size.h=rects[i].h;
        
        PgContextBlitArea(OCImage.offscreen_context, &src_rect, NULL, &dest_rect);
    }

    if (PgFlush() < 0)
    {
        SDL_SetError("ph_OCUpdate(): PgFlush failed.\n");
    }
}

void ph_OCDCUpdate(_THIS, int numrects, SDL_Rect *rects)
{
    PgWaitHWIdle();

    if (PgFlush() < 0)
    {
        SDL_SetError("ph_OCDCUpdate(): PgFlush failed.\n");
    }
}