src/video/directfb/SDL_DirectFB_render.c

/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"

#if SDL_VIDEO_DRIVER_DIRECTFB
#include "SDL_DirectFB_window.h"
#include "SDL_DirectFB_modes.h"

#include "SDL_syswm.h"
#include "SDL_DirectFB_shape.h"

#include "../SDL_sysvideo.h"
#include "../../render/SDL_sysrender.h"

#ifndef DFB_VERSION_ATLEAST

#define DFB_VERSIONNUM(X, Y, Z)                     \
    ((X)*1000 + (Y)*100 + (Z))

#define DFB_COMPILEDVERSION \
    DFB_VERSIONNUM(DIRECTFB_MAJOR_VERSION, DIRECTFB_MINOR_VERSION, DIRECTFB_MICRO_VERSION)

#define DFB_VERSION_ATLEAST(X, Y, Z) \
    (DFB_COMPILEDVERSION >= DFB_VERSIONNUM(X, Y, Z))

#define SDL_DFB_CHECK(x)    x

#endif

/* the following is not yet tested ... */
#define USE_DISPLAY_PALETTE         (0)


#define SDL_DFB_RENDERERDATA(rend) DirectFB_RenderData *renddata = ((rend) ? (DirectFB_RenderData *) (rend)->driverdata : NULL)


/* DirectFB renderer implementation */

static SDL_Renderer *DirectFB_CreateRenderer(SDL_Window * window,
                                             Uint32 flags);
static void DirectFB_ActivateRenderer(SDL_Renderer * renderer);
static int DirectFB_CreateTexture(SDL_Renderer * renderer,
                                  SDL_Texture * texture);
static int DirectFB_QueryTexturePixels(SDL_Renderer * renderer,
                                       SDL_Texture * texture,
                                       void **pixels, int *pitch);
static int DirectFB_SetTexturePalette(SDL_Renderer * renderer,
                                      SDL_Texture * texture,
                                      const SDL_Color * colors,
                                      int firstcolor, int ncolors);
static int DirectFB_GetTexturePalette(SDL_Renderer * renderer,
                                      SDL_Texture * texture,
                                      SDL_Color * colors,
                                      int firstcolor, int ncolors);
static int DirectFB_SetTextureAlphaMod(SDL_Renderer * renderer,
                                       SDL_Texture * texture);
static int DirectFB_SetTextureColorMod(SDL_Renderer * renderer,
                                       SDL_Texture * texture);
static int DirectFB_SetTextureBlendMode(SDL_Renderer * renderer,
                                        SDL_Texture * texture);
static int DirectFB_SetTextureScaleMode(SDL_Renderer * renderer,
                                        SDL_Texture * texture);
static int DirectFB_UpdateTexture(SDL_Renderer * renderer,
                                  SDL_Texture * texture,
                                  const SDL_Rect * rect,
                                  const void *pixels, int pitch);
static int DirectFB_LockTexture(SDL_Renderer * renderer,
                                SDL_Texture * texture,
                                const SDL_Rect * rect,
                                void **pixels, int *pitch);
static void DirectFB_UnlockTexture(SDL_Renderer * renderer,
                                   SDL_Texture * texture);
static void DirectFB_DirtyTexture(SDL_Renderer * renderer,
                                  SDL_Texture * texture, int numrects,
                                  const SDL_Rect * rects);
static int DirectFB_SetDrawBlendMode(SDL_Renderer * renderer);
static int DirectFB_RenderDrawPoints(SDL_Renderer * renderer,
                                const SDL_FPoint * points, int count);
static int DirectFB_RenderDrawLines(SDL_Renderer * renderer,
                               const SDL_FPoint * points, int count);
static int DirectFB_RenderDrawRects(SDL_Renderer * renderer,
        const SDL_Rect ** rects, int count);
static int DirectFB_RenderFillRects(SDL_Renderer * renderer,
        const SDL_FRect * rects, int count);
static int DirectFB_RenderCopy(SDL_Renderer * renderer,
                               SDL_Texture * texture,
                               const SDL_Rect * srcrect,
                               const SDL_FRect * dstrect);
static void DirectFB_RenderPresent(SDL_Renderer * renderer);
static void DirectFB_DestroyTexture(SDL_Renderer * renderer,
                                    SDL_Texture * texture);
static void DirectFB_DestroyRenderer(SDL_Renderer * renderer);
static int DirectFB_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
                     Uint32 format, void * pixels, int pitch);
static int DirectFB_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
                      Uint32 format, const void * pixels, int pitch);
static int DirectFB_UpdateViewport(SDL_Renderer * renderer);
static int DirectFB_UpdateClipRect(SDL_Renderer * renderer);
static int DirectFB_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture);

static int PrepareDraw(SDL_Renderer * renderer);


#define SDL_DFB_WINDOWSURFACE(win)  IDirectFBSurface *destsurf = ((DFB_WindowData *) ((win)->driverdata))->surface;

SDL_RenderDriver DirectFB_RenderDriver = {
    DirectFB_CreateRenderer,
    {
     "directfb",
     (SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
     /* (SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
      SDL_TEXTUREMODULATE_ALPHA),
      (SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK | SDL_BLENDMODE_BLEND |
      SDL_BLENDMODE_ADD | SDL_BLENDMODE_MOD),
     (SDL_SCALEMODE_NONE | SDL_SCALEMODE_FAST |
      SDL_SCALEMODE_SLOW | SDL_SCALEMODE_BEST), */
     0,
     {
             /* formats filled in later */
     },
     0,
     0}
};

typedef struct
{
    SDL_Window *window;
    DFBSurfaceFlipFlags flipflags;
    int size_changed;
    int lastBlendMode;
    DFBSurfaceBlittingFlags blitFlags;
    DFBSurfaceDrawingFlags drawFlags;
    IDirectFBSurface* target;
} DirectFB_RenderData;

typedef struct
{
    IDirectFBSurface *surface;
    Uint32 format;
    void *pixels;
    int pitch;
    IDirectFBPalette *palette;
    int isDirty;

    SDL_VideoDisplay *display;      /* only for yuv textures */

#if (DFB_VERSION_ATLEAST(1,2,0))
    DFBSurfaceRenderOptions render_options;
#endif
} DirectFB_TextureData;

static SDL_INLINE void
SDLtoDFBRect(const SDL_Rect * sr, DFBRectangle * dr)
{
    dr->x = sr->x;
    dr->y = sr->y;
    dr->h = sr->h;
    dr->w = sr->w;
}
static SDL_INLINE void
SDLtoDFBRect_Float(const SDL_FRect * sr, DFBRectangle * dr)
{
    dr->x = sr->x;
    dr->y = sr->y;
    dr->h = sr->h;
    dr->w = sr->w;
}


static int
TextureHasAlpha(DirectFB_TextureData * data)
{
    /* Drawing primitive ? */
    if (!data)
        return 0;

    return (DFB_PIXELFORMAT_HAS_ALPHA(DirectFB_SDLToDFBPixelFormat(data->format)) ? 1 : 0);
#if 0
    switch (data->format) {
    case SDL_PIXELFORMAT_INDEX4LSB:
    case SDL_PIXELFORMAT_INDEX4MSB:
    case SDL_PIXELFORMAT_ARGB4444:
    case SDL_PIXELFORMAT_ARGB1555:
    case SDL_PIXELFORMAT_ARGB8888:
    case SDL_PIXELFORMAT_RGBA8888:
    case SDL_PIXELFORMAT_ABGR8888:
    case SDL_PIXELFORMAT_BGRA8888:
    case SDL_PIXELFORMAT_ARGB2101010:
       return 1;
    default:
        return 0;
    }
#endif
}

static SDL_INLINE IDirectFBSurface *get_dfb_surface(SDL_Window *window)
{
    SDL_SysWMinfo wm_info;
    SDL_memset(&wm_info, 0, sizeof(SDL_SysWMinfo));

    SDL_VERSION(&wm_info.version);
    SDL_GetWindowWMInfo(window, &wm_info);

    return wm_info.info.dfb.surface;
}

static SDL_INLINE IDirectFBWindow *get_dfb_window(SDL_Window *window)
{
    SDL_SysWMinfo wm_info;
    SDL_memset(&wm_info, 0, sizeof(SDL_SysWMinfo));

    SDL_VERSION(&wm_info.version);
    SDL_GetWindowWMInfo(window, &wm_info);

    return wm_info.info.dfb.window;
}

static void
SetBlendMode(DirectFB_RenderData * data, int blendMode,
             DirectFB_TextureData * source)
{
    IDirectFBSurface *destsurf = data->target;

    /* FIXME: check for format change */
    if (1 || data->lastBlendMode != blendMode) {
        switch (blendMode) {
        case SDL_BLENDMODE_NONE:
                                           /**< No blending */
            data->blitFlags = DSBLIT_NOFX;
            data->drawFlags = DSDRAW_NOFX;
            SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_ONE));
            SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_ZERO));
            break;
#if 0
        case SDL_BLENDMODE_MASK:
            data->blitFlags =  DSBLIT_BLEND_ALPHACHANNEL;
            data->drawFlags = DSDRAW_BLEND;
            SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_SRCALPHA));
            SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_INVSRCALPHA));
            break;
#endif
        case SDL_BLENDMODE_BLEND:
            data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
            data->drawFlags = DSDRAW_BLEND;
            SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_SRCALPHA));
            SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_INVSRCALPHA));
            break;
        case SDL_BLENDMODE_ADD:
            data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
            data->drawFlags = DSDRAW_BLEND;
            /* FIXME: SRCALPHA kills performance on radeon ...
             * It will be cheaper to copy the surface to a temporary surface and premultiply
             */
            if (source && TextureHasAlpha(source))
                SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_SRCALPHA));
            else
                SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_ONE));
            SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_ONE));
            break;
        case SDL_BLENDMODE_MOD:
            data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
            data->drawFlags = DSDRAW_BLEND;
            SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_ZERO));
            SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_SRCCOLOR));

            break;
        }
        data->lastBlendMode = blendMode;
    }
}

static int
DisplayPaletteChanged(void *userdata, SDL_Palette * palette)
{
#if USE_DISPLAY_PALETTE
    DirectFB_RenderData *data = (DirectFB_RenderData *) userdata;
    SDL_DFB_WINDOWSURFACE(data->window);
    IDirectFBPalette *surfpal;

    int i;
    int ncolors;
    DFBColor entries[256];

    SDL_DFB_CHECKERR(destsurf->GetPalette(destsurf, &surfpal));

    /* FIXME: number of colors */
    ncolors = (palette->ncolors < 256 ? palette->ncolors : 256);

    for (i = 0; i < ncolors; ++i) {
        entries[i].r = palette->colors[i].r;
        entries[i].g = palette->colors[i].g;
        entries[i].b = palette->colors[i].b;
        entries[i].a = palette->colors[i].a;
    }
    SDL_DFB_CHECKERR(surfpal->SetEntries(surfpal, entries, ncolors, 0));
    return 0;
  error:
#else
    SDL_Unsupported();
#endif
    return -1;
}

static void
DirectFB_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
{
    SDL_DFB_RENDERERDATA(renderer);

    if (event->event == SDL_WINDOWEVENT_SIZE_CHANGED) {
        /* Rebind the context to the window area and update matrices */
        /* SDL_CurrentContext = NULL; */
        /* data->updateSize = SDL_TRUE; */
        renddata->size_changed = SDL_TRUE;
   }
}

int
DirectFB_RenderClear(SDL_Renderer * renderer)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;

    DirectFB_ActivateRenderer(renderer);

    PrepareDraw(renderer);

    destsurf->Clear(destsurf, renderer->r, renderer->g, renderer->b, renderer->a);


    return 0;
}

SDL_Renderer *
DirectFB_CreateRenderer(SDL_Window * window, Uint32 flags)
{
    IDirectFBSurface *winsurf = get_dfb_surface(window);
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
    SDL_Renderer *renderer = NULL;
    DirectFB_RenderData *data = NULL;
    DFBSurfaceCapabilities scaps;

    SDL_DFB_ALLOC_CLEAR(renderer, sizeof(*renderer));
    SDL_DFB_ALLOC_CLEAR(data, sizeof(*data));

    renderer->WindowEvent = DirectFB_WindowEvent;
    renderer->CreateTexture = DirectFB_CreateTexture;
    renderer->SetTextureAlphaMod = DirectFB_SetTextureAlphaMod;
    renderer->SetTextureColorMod = DirectFB_SetTextureColorMod;
    renderer->SetTextureBlendMode = DirectFB_SetTextureBlendMode;
    renderer->UpdateTexture = DirectFB_UpdateTexture;
    renderer->LockTexture = DirectFB_LockTexture;
    renderer->RenderClear = DirectFB_RenderClear;
    renderer->UnlockTexture = DirectFB_UnlockTexture;
    renderer->RenderDrawPoints = DirectFB_RenderDrawPoints;
    renderer->RenderDrawLines = DirectFB_RenderDrawLines;
    /* SetDrawColor - no needed */
    renderer->RenderFillRects = DirectFB_RenderFillRects;

    renderer->RenderCopy = DirectFB_RenderCopy;
    renderer->RenderPresent = DirectFB_RenderPresent;

    /* FIXME: Yet to be tested */
    renderer->RenderReadPixels = DirectFB_RenderReadPixels;
    /* renderer->RenderWritePixels = DirectFB_RenderWritePixels; */

    renderer->DestroyTexture = DirectFB_DestroyTexture;
    renderer->DestroyRenderer = DirectFB_DestroyRenderer;
    renderer->UpdateViewport = DirectFB_UpdateViewport;
    renderer->UpdateClipRect = DirectFB_UpdateClipRect;
    renderer->SetRenderTarget = DirectFB_SetRenderTarget;

#if 0
    renderer->QueryTexturePixels = DirectFB_QueryTexturePixels;
    renderer->SetTexturePalette = DirectFB_SetTexturePalette;
    renderer->GetTexturePalette = DirectFB_GetTexturePalette;
    renderer->SetTextureScaleMode = DirectFB_SetTextureScaleMode;
    renderer->DirtyTexture = DirectFB_DirtyTexture;
    renderer->SetDrawBlendMode = DirectFB_SetDrawBlendMode;
    renderer->RenderDrawRects = DirectFB_RenderDrawRects;
#endif

    renderer->info = DirectFB_RenderDriver.info;
    renderer->window = window;      /* SDL window */
    renderer->driverdata = data;

    renderer->info.flags =
        SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE;

    data->window = window;
    data->target = winsurf;

    data->flipflags = DSFLIP_PIPELINE | DSFLIP_BLIT;

    if (flags & SDL_RENDERER_PRESENTVSYNC) {
        data->flipflags |= DSFLIP_WAITFORSYNC | DSFLIP_ONSYNC;
        renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
    } else
        data->flipflags |= DSFLIP_ONSYNC;

    SDL_DFB_CHECKERR(winsurf->GetCapabilities(winsurf, &scaps));

#if 0
    if (scaps & DSCAPS_DOUBLE)
        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
    else if (scaps & DSCAPS_TRIPLE)
        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
    else
        renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER;
#endif

    DirectFB_SetSupportedPixelFormats(&renderer->info);

#if 0
    /* Set up a palette watch on the display palette */
    if (display-> palette) {
        SDL_AddPaletteWatch(display->palette, DisplayPaletteChanged, data);
    }
#endif

    return renderer;

  error:
    SDL_DFB_FREE(renderer);
    SDL_DFB_FREE(data);
    return NULL;
}

static void
DirectFB_ActivateRenderer(SDL_Renderer * renderer)
{
    SDL_DFB_RENDERERDATA(renderer);
    SDL_Window *window = renderer->window;
    SDL_DFB_WINDOWDATA(window);

    if (renddata->size_changed /* || windata->wm_needs_redraw */) {
        renddata->size_changed = SDL_FALSE;
    }
}


static int
DirectFB_AcquireVidLayer(SDL_Renderer * renderer, SDL_Texture * texture)
{
    SDL_Window *window = renderer->window;
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
    SDL_DFB_DEVICEDATA(display->device);
    DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;
    DirectFB_TextureData *data = texture->driverdata;
    DFBDisplayLayerConfig layconf;
    DFBResult ret;

    if (devdata->use_yuv_direct && (dispdata->vidID >= 0)
        && (!dispdata->vidIDinuse)
        && SDL_ISPIXELFORMAT_FOURCC(data->format)) {
        layconf.flags =
            DLCONF_WIDTH | DLCONF_HEIGHT | DLCONF_PIXELFORMAT |
            DLCONF_SURFACE_CAPS;
        layconf.width = texture->w;
        layconf.height = texture->h;
        layconf.pixelformat = DirectFB_SDLToDFBPixelFormat(data->format);
        layconf.surface_caps = DSCAPS_VIDEOONLY | DSCAPS_DOUBLE;

        SDL_DFB_CHECKERR(devdata->dfb->GetDisplayLayer(devdata->dfb,
                                                       dispdata->vidID,
                                                       &dispdata->vidlayer));
        SDL_DFB_CHECKERR(dispdata->
                         vidlayer->SetCooperativeLevel(dispdata->vidlayer,
                                                       DLSCL_EXCLUSIVE));

        if (devdata->use_yuv_underlays) {
            ret = dispdata->vidlayer->SetLevel(dispdata->vidlayer, -1);
            if (ret != DFB_OK)
                SDL_DFB_DEBUG("Underlay Setlevel not supported\n");
        }
        SDL_DFB_CHECKERR(dispdata->
                         vidlayer->SetConfiguration(dispdata->vidlayer,
                                                    &layconf));
        SDL_DFB_CHECKERR(dispdata->
                         vidlayer->GetSurface(dispdata->vidlayer,
                                              &data->surface));
        dispdata->vidIDinuse = 1;
        data->display = display;
        return 0;
    }
    return 1;
  error:
    if (dispdata->vidlayer) {
        SDL_DFB_RELEASE(data->surface);
        SDL_DFB_CHECKERR(dispdata->
                         vidlayer->SetCooperativeLevel(dispdata->vidlayer,
                                                       DLSCL_ADMINISTRATIVE));
        SDL_DFB_RELEASE(dispdata->vidlayer);
    }
    return 1;
}

static int
DirectFB_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    SDL_Window *window = renderer->window;
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
    SDL_DFB_DEVICEDATA(display->device);
    DirectFB_TextureData *data;
    DFBSurfaceDescription dsc;
    DFBSurfacePixelFormat pixelformat;

    DirectFB_ActivateRenderer(renderer);

    SDL_DFB_ALLOC_CLEAR(data, sizeof(*data));
    texture->driverdata = data;

    /* find the right pixelformat */
    pixelformat = DirectFB_SDLToDFBPixelFormat(texture->format);
    if (pixelformat == DSPF_UNKNOWN) {
        SDL_SetError("Unknown pixel format %d\n", data->format);
        goto error;
    }

    data->format = texture->format;
    data->pitch = texture->w * DFB_BYTES_PER_PIXEL(pixelformat);

    if (DirectFB_AcquireVidLayer(renderer, texture) != 0) {
        /* fill surface description */
        dsc.flags =
            DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
        dsc.width = texture->w;
        dsc.height = texture->h;
        if(texture->format == SDL_PIXELFORMAT_YV12 ||
           texture->format == SDL_PIXELFORMAT_IYUV) {
           /* dfb has problems with odd sizes -make them even internally */
           dsc.width += (dsc.width % 2);
           dsc.height += (dsc.height % 2);
        }
        /* <1.2 Never use DSCAPS_VIDEOONLY here. It kills performance
         * No DSCAPS_SYSTEMONLY either - let dfb decide
         * 1.2: DSCAPS_SYSTEMONLY boosts performance by factor ~8
         * Depends on other settings as well. Let dfb decide.
         */
        dsc.caps = DSCAPS_PREMULTIPLIED;
#if 0
        if (texture->access == SDL_TEXTUREACCESS_STREAMING)
            dsc.caps |= DSCAPS_SYSTEMONLY;
        else
            dsc.caps |= DSCAPS_VIDEOONLY;
#endif

        dsc.pixelformat = pixelformat;
        data->pixels = NULL;

        /* Create the surface */
        SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc,
                                                     &data->surface));
        if (SDL_ISPIXELFORMAT_INDEXED(data->format)
            && !SDL_ISPIXELFORMAT_FOURCC(data->format)) {
#if 1
            SDL_DFB_CHECKERR(data->surface->GetPalette(data->surface, &data->palette));
#else
            /* DFB has issues with blitting LUT8 surfaces.
             * Creating a new palette does not help.
             */
            DFBPaletteDescription pal_desc;
            pal_desc.flags = DPDESC_SIZE; /* | DPDESC_ENTRIES */
            pal_desc.size = 256;
            SDL_DFB_CHECKERR(devdata->dfb->CreatePalette(devdata->dfb, &pal_desc,&data->palette));
            SDL_DFB_CHECKERR(data->surface->SetPalette(data->surface, data->palette));
#endif
        }

    }
#if (DFB_VERSION_ATLEAST(1,2,0))
    data->render_options = DSRO_NONE;
#endif
    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
        /* 3 plane YUVs return 1 bpp, but we need more space for other planes */
        if(texture->format == SDL_PIXELFORMAT_YV12 ||
           texture->format == SDL_PIXELFORMAT_IYUV) {
            SDL_DFB_ALLOC_CLEAR(data->pixels, (texture->h * data->pitch  + ((texture->h + texture->h % 2) * (data->pitch + data->pitch % 2) * 2) / 4));
        } else {
            SDL_DFB_ALLOC_CLEAR(data->pixels, texture->h * data->pitch);
        }
    }

    return 0;

  error:
    SDL_DFB_RELEASE(data->palette);
    SDL_DFB_RELEASE(data->surface);
    SDL_DFB_FREE(texture->driverdata);
    return -1;
}

static int
DirectFB_QueryTexturePixels(SDL_Renderer * renderer,
                            SDL_Texture * texture, void **pixels, int *pitch)
{
    DirectFB_TextureData *texturedata =
        (DirectFB_TextureData *) texture->driverdata;

    if (texturedata->display) {
        return -1;
    } else {
        *pixels = texturedata->pixels;
        *pitch = texturedata->pitch;
    }
    return 0;
}

static int
DirectFB_SetTexturePalette(SDL_Renderer * renderer,
                           SDL_Texture * texture,
                           const SDL_Color * colors, int firstcolor,
                           int ncolors)
{
    DirectFB_TextureData *data = (DirectFB_TextureData *) texture->driverdata;
    if (SDL_ISPIXELFORMAT_INDEXED(data->format)
        && !SDL_ISPIXELFORMAT_FOURCC(data->format)) {
        DFBColor entries[256];
        int i;

        if (ncolors > 256)
            ncolors = 256;

        for (i = 0; i < ncolors; ++i) {
            entries[i].r = colors[i].r;
            entries[i].g = colors[i].g;
            entries[i].b = colors[i].b;
            entries[i].a = 0xff;
        }
        SDL_DFB_CHECKERR(data->
                         palette->SetEntries(data->palette, entries, ncolors, firstcolor));
        return 0;
    } else {
        return SDL_SetError("YUV textures don't have a palette");
    }
  error:
    return -1;
}

static int
DirectFB_GetTexturePalette(SDL_Renderer * renderer,
                           SDL_Texture * texture, SDL_Color * colors,
                           int firstcolor, int ncolors)
{
    DirectFB_TextureData *data = (DirectFB_TextureData *) texture->driverdata;

    if (SDL_ISPIXELFORMAT_INDEXED(data->format)
        && !SDL_ISPIXELFORMAT_FOURCC(data->format)) {
        DFBColor entries[256];
        int i;

        SDL_DFB_CHECKERR(data->
                         palette->GetEntries(data->palette, entries, ncolors,
                                             firstcolor));

        for (i = 0; i < ncolors; ++i) {
            colors[i].r = entries[i].r;
            colors[i].g = entries[i].g;
            colors[i].b = entries[i].b;
            colors[i].a = SDL_ALPHA_OPAQUE;
        }
        return 0;
    } else {
        return SDL_SetError("YUV textures don't have a palette");
    }
  error:
    return -1;
}

static int
DirectFB_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
    return 0;
}

static int
DirectFB_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
    return 0;
}

static int
DirectFB_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
    switch (texture->blendMode) {
    case SDL_BLENDMODE_NONE:
    /* case SDL_BLENDMODE_MASK: */
    case SDL_BLENDMODE_BLEND:
    case SDL_BLENDMODE_ADD:
    case SDL_BLENDMODE_MOD:
        return 0;
    default:
        texture->blendMode = SDL_BLENDMODE_NONE;
        return SDL_Unsupported();
    }
}

static int
DirectFB_SetDrawBlendMode(SDL_Renderer * renderer)
{
    switch (renderer->blendMode) {
    case SDL_BLENDMODE_NONE:
    /* case SDL_BLENDMODE_MASK: */
    case SDL_BLENDMODE_BLEND:
    case SDL_BLENDMODE_ADD:
    case SDL_BLENDMODE_MOD:
        return 0;
    default:
        renderer->blendMode = SDL_BLENDMODE_NONE;
        return SDL_Unsupported();
    }
}

#if 0
static int
DirectFB_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
#if (DFB_VERSION_ATLEAST(1,2,0))

    DirectFB_TextureData *data = (DirectFB_TextureData *) texture->driverdata;

    switch (texture->scaleMode) {
    case SDL_SCALEMODE_NONE:
    case SDL_SCALEMODE_FAST:
        data->render_options = DSRO_NONE;
        break;
    case SDL_SCALEMODE_SLOW:
        data->render_options = DSRO_SMOOTH_UPSCALE | DSRO_SMOOTH_DOWNSCALE;
        break;
    case SDL_SCALEMODE_BEST:
        data->render_options =
            DSRO_SMOOTH_UPSCALE | DSRO_SMOOTH_DOWNSCALE | DSRO_ANTIALIAS;
        break;
    default:
        data->render_options = DSRO_NONE;
        texture->scaleMode = SDL_SCALEMODE_NONE;
        return SDL_Unsupported();
    }
#endif
    return 0;
}
#endif

static int
DirectFB_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                       const SDL_Rect * rect, const void *pixels, int pitch)
{
    DirectFB_TextureData *data = (DirectFB_TextureData *) texture->driverdata;
    Uint8 *dpixels;
    int dpitch;
    Uint8 *src, *dst;
    int row;
    size_t length;
    int bpp = DFB_BYTES_PER_PIXEL(DirectFB_SDLToDFBPixelFormat(texture->format));
    /* FIXME: SDL_BYTESPERPIXEL(texture->format) broken for yuv yv12 3 planes */

    DirectFB_ActivateRenderer(renderer);

    if ((texture->format == SDL_PIXELFORMAT_YV12) ||
        (texture->format == SDL_PIXELFORMAT_IYUV)) {
        bpp = 1;
    }

    SDL_DFB_CHECKERR(data->surface->Lock(data->surface,
                                         DSLF_WRITE | DSLF_READ,
                                         ((void **) &dpixels), &dpitch));
    src = (Uint8 *) pixels;
    dst = (Uint8 *) dpixels + rect->y * dpitch + rect->x * bpp;
    length = rect->w * bpp;
    for (row = 0; row < rect->h; ++row) {
        SDL_memcpy(dst, src, length);
        src += pitch;
        dst += dpitch;
    }
    /* copy other planes for 3 plane formats */
    if ((texture->format == SDL_PIXELFORMAT_YV12) ||
        (texture->format == SDL_PIXELFORMAT_IYUV)) {
        src = (Uint8 *) pixels + texture->h * pitch;
        dst = (Uint8 *) dpixels + texture->h * dpitch + rect->y * dpitch / 4 + rect->x * bpp / 2;
        for (row = 0; row < rect->h / 2 + (rect->h & 1); ++row) {
            SDL_memcpy(dst, src, length / 2);
            src += pitch / 2;
            dst += dpitch / 2;
        }
        src = (Uint8 *) pixels + texture->h * pitch + texture->h * pitch / 4;
        dst = (Uint8 *) dpixels + texture->h * dpitch + texture->h * dpitch / 4 + rect->y * dpitch / 4 + rect->x * bpp / 2;
        for (row = 0; row < rect->h / 2 + (rect->h & 1); ++row) {
            SDL_memcpy(dst, src, length / 2);
            src += pitch / 2;
            dst += dpitch / 2;
        }
    }
    SDL_DFB_CHECKERR(data->surface->Unlock(data->surface));
    data->isDirty = 0;
    return 0;
  error:
    return 1;

}

static int
DirectFB_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                     const SDL_Rect * rect, void **pixels, int *pitch)
{
    DirectFB_TextureData *texturedata =
        (DirectFB_TextureData *) texture->driverdata;

    DirectFB_ActivateRenderer(renderer);

#if 0
    if (markDirty) {
        SDL_AddDirtyRect(&texturedata->dirty, rect);
    }
#endif

    if (texturedata->display) {
        void *fdata;
        int fpitch;

        SDL_DFB_CHECKERR(texturedata->surface->Lock(texturedata->surface,
                                                    DSLF_WRITE | DSLF_READ,
                                                    &fdata, &fpitch));
        *pitch = fpitch;
        *pixels = fdata;
    } else {
        *pixels =
            (void *) ((Uint8 *) texturedata->pixels +
                      rect->y * texturedata->pitch +
                      rect->x * DFB_BYTES_PER_PIXEL(DirectFB_SDLToDFBPixelFormat(texture->format)));
        *pitch = texturedata->pitch;
        texturedata->isDirty = 1;
    }
    return 0;

  error:
    return -1;
}

static void
DirectFB_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    DirectFB_TextureData *texturedata =
        (DirectFB_TextureData *) texture->driverdata;

    DirectFB_ActivateRenderer(renderer);

    if (texturedata->display) {
        SDL_DFB_CHECK(texturedata->surface->Unlock(texturedata->surface));
        texturedata->pixels = NULL;
    }
}

#if 0
static void
DirectFB_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                      int numrects, const SDL_Rect * rects)
{
    DirectFB_TextureData *data = (DirectFB_TextureData *) texture->driverdata;
    int i;

    for (i = 0; i < numrects; ++i) {
        SDL_AddDirtyRect(&data->dirty, &rects[i]);
    }
}
#endif

static int DirectFB_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    DirectFB_TextureData *tex_data = NULL;

    DirectFB_ActivateRenderer(renderer);
    if (texture) {
        tex_data = (DirectFB_TextureData *) texture->driverdata;
        data->target = tex_data->surface;
    } else {
        data->target = get_dfb_surface(data->window);
    }
    data->lastBlendMode = 0;
    return 0;
}


static int
PrepareDraw(SDL_Renderer * renderer)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;

    Uint8 r, g, b, a;

    r = renderer->r;
    g = renderer->g;
    b = renderer->b;
    a = renderer->a;

    SetBlendMode(data, renderer->blendMode, NULL);
    SDL_DFB_CHECKERR(destsurf->SetDrawingFlags(destsurf, data->drawFlags));

    switch (renderer->blendMode) {
    case SDL_BLENDMODE_NONE:
    /* case SDL_BLENDMODE_MASK: */
    case SDL_BLENDMODE_BLEND:
        break;
    case SDL_BLENDMODE_ADD:
    case SDL_BLENDMODE_MOD:
        r = ((int) r * (int) a) / 255;
        g = ((int) g * (int) a) / 255;
        b = ((int) b * (int) a) / 255;
        a = 255;
        break;
    }

    SDL_DFB_CHECKERR(destsurf->SetColor(destsurf, r, g, b, a));
    return 0;
  error:
    return -1;
}

static int DirectFB_RenderDrawPoints(SDL_Renderer * renderer,
                                const SDL_FPoint * points, int count)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;
    DFBRegion clip_region;
    int i;

    DirectFB_ActivateRenderer(renderer);

    PrepareDraw(renderer);
    destsurf->GetClip(destsurf, &clip_region);
    for (i=0; i < count; i++) {
        int x = points[i].x + clip_region.x1;
        int y = points[i].y + clip_region.y1;
        SDL_DFB_CHECKERR(destsurf->DrawLine(destsurf, x, y, x, y));
    }
    return 0;
  error:
    return -1;
}

static int DirectFB_RenderDrawLines(SDL_Renderer * renderer,
                               const SDL_FPoint * points, int count)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;
    DFBRegion clip_region;
    int i;

    DirectFB_ActivateRenderer(renderer);

    PrepareDraw(renderer);
    /* Use antialiasing when available */
#if (DFB_VERSION_ATLEAST(1,2,0))
    SDL_DFB_CHECKERR(destsurf->SetRenderOptions(destsurf, DSRO_ANTIALIAS));
#endif

    destsurf->GetClip(destsurf, &clip_region);
    for (i=0; i < count - 1; i++) {
        int x1 = points[i].x + clip_region.x1;
        int y1 = points[i].y + clip_region.y1;
        int x2 = points[i + 1].x + clip_region.x1;
        int y2 = points[i + 1].y + clip_region.y1;
        SDL_DFB_CHECKERR(destsurf->DrawLine(destsurf, x1, y1, x2, y2));
    }

    return 0;
  error:
    return -1;
}

static int
DirectFB_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects, int count)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;
    DFBRegion clip_region;
    int i;

    DirectFB_ActivateRenderer(renderer);

    PrepareDraw(renderer);

    destsurf->GetClip(destsurf, &clip_region);
    for (i=0; i<count; i++) {
        SDL_Rect dst = {rects[i]->x, rects[i]->y, rects[i]->w, rects[i]->h};
        dst.x += clip_region.x1;
        dst.y += clip_region.y1;
        SDL_DFB_CHECKERR(destsurf->DrawRectangle(destsurf, dst.x, dst.y,
                dst.w, dst.h));
    }

    return 0;
  error:
    return -1;
}

static int
DirectFB_RenderFillRects(SDL_Renderer * renderer, const SDL_FRect * rects, int count)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;
    DFBRegion clip_region;
    int i;

    DirectFB_ActivateRenderer(renderer);

    PrepareDraw(renderer);

    destsurf->GetClip(destsurf, &clip_region);
    for (i=0; i<count; i++) {
        SDL_Rect dst = {rects[i].x, rects[i].y, rects[i].w, rects[i].h};
        dst.x += clip_region.x1;
        dst.y += clip_region.y1;
        SDL_DFB_CHECKERR(destsurf->FillRectangle(destsurf, dst.x, dst.y,
                dst.w, dst.h));
    }

    return 0;
  error:
    return -1;
}

static int
DirectFB_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
                    const SDL_Rect * srcrect, const SDL_FRect * dstrect)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = data->target;
    DirectFB_TextureData *texturedata =
        (DirectFB_TextureData *) texture->driverdata;
    Uint8 alpha, r, g, b;
    DFBRegion clip_region;
    DFBRectangle sr, dr;

    DirectFB_ActivateRenderer(renderer);

    SDLtoDFBRect(srcrect, &sr);
    SDLtoDFBRect_Float(dstrect, &dr);

    destsurf->GetClip(destsurf, &clip_region);
    dr.x += clip_region.x1;
    dr.y += clip_region.y1;

    if (texturedata->display) {
        int px, py;
        SDL_Window *window = renderer->window;
        IDirectFBWindow *dfbwin = get_dfb_window(window);
        SDL_DFB_WINDOWDATA(window);
        SDL_VideoDisplay *display = texturedata->display;
        DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;

        SDL_DFB_CHECKERR(dispdata->
                         vidlayer->SetSourceRectangle(dispdata->vidlayer,
                                                      sr.x, sr.y, sr.w, sr.h));
        dfbwin->GetPosition(dfbwin, &px, &py);
        px += windata->client.x;
        py += windata->client.y;
        SDL_DFB_CHECKERR(dispdata->
                         vidlayer->SetScreenRectangle(dispdata->vidlayer,
                                                      px + dr.x,
                                                      py + dr.y,
                                                      dr.w,
                                                      dr.h));
    } else {
        DFBSurfaceBlittingFlags flags = 0;

#if 0
        if (texturedata->dirty.list) {
            SDL_DirtyRect *dirty;
            void *pixels;
            int bpp = DFB_BYTES_PER_PIXEL(DirectFB_SDLToDFBPixelFormat(texture->format));
            int pitch = texturedata->pitch;

            for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) {
                SDL_Rect *rect = &dirty->rect;
                pixels =
                    (void *) ((Uint8 *) texturedata->pixels +
                              rect->y * pitch + rect->x * bpp);
                DirectFB_UpdateTexture(renderer, texture, rect,
                                       pixels,
                                       texturedata->pitch);
            }
            SDL_ClearDirtyRects(&texturedata->dirty);
        }
#endif
        if (texturedata->isDirty)
        {
            SDL_Rect rect;

            rect.x = 0;
            rect.y = 0;
            rect.w = texture->w;
            rect.h = texture->h;

            DirectFB_UpdateTexture(renderer, texture, &rect, texturedata->pixels, texturedata->pitch);
        }

        alpha = r = g = b = 0xff;
        if (texture->modMode & SDL_TEXTUREMODULATE_ALPHA){
            alpha = texture->a;
            flags |= DSBLIT_BLEND_COLORALPHA;
        }

        if (texture->modMode & SDL_TEXTUREMODULATE_COLOR) {
            r = texture->r;
            g = texture->g;
            b = texture->b;
            flags |= DSBLIT_COLORIZE;
        }
        SDL_DFB_CHECKERR(destsurf->
                         SetColor(destsurf, r, g, b, alpha));

        /* ???? flags |= DSBLIT_SRC_PREMULTCOLOR; */

        SetBlendMode(data, texture->blendMode, texturedata);

        SDL_DFB_CHECKERR(destsurf->SetBlittingFlags(destsurf,
                                                    data->blitFlags | flags));

#if (DFB_VERSION_ATLEAST(1,2,0))
        SDL_DFB_CHECKERR(destsurf->SetRenderOptions(destsurf,
                                                    texturedata->
                                                    render_options));
#endif

        if (srcrect->w == dstrect->w && srcrect->h == dstrect->h) {
            SDL_DFB_CHECKERR(destsurf->Blit(destsurf,
                                            texturedata->surface,
                                            &sr, dr.x, dr.y));
        } else {
            SDL_DFB_CHECKERR(destsurf->StretchBlit(destsurf,
                                                   texturedata->surface,
                                                   &sr, &dr));
        }
    }
    return 0;
  error:
    return -1;
}

static void
DirectFB_RenderPresent(SDL_Renderer * renderer)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    SDL_Window *window = renderer->window;
    SDL_DFB_WINDOWDATA(window);
    SDL_ShapeData *shape_data = (window->shaper ? window->shaper->driverdata : NULL);

    DirectFB_ActivateRenderer(renderer);

    if (shape_data && shape_data->surface) {
        /* saturate the window surface alpha channel */
        SDL_DFB_CHECK(windata->window_surface->SetSrcBlendFunction(windata->window_surface, DSBF_ONE));
        SDL_DFB_CHECK(windata->window_surface->SetDstBlendFunction(windata->window_surface, DSBF_ONE));
        SDL_DFB_CHECK(windata->window_surface->SetDrawingFlags(windata->window_surface, DSDRAW_BLEND));
        SDL_DFB_CHECK(windata->window_surface->SetColor(windata->window_surface, 0, 0, 0, 0xff));
        SDL_DFB_CHECK(windata->window_surface->FillRectangle(windata->window_surface, 0,0, windata->size.w, windata->size.h));

        /* blit the mask */
        SDL_DFB_CHECK(windata->surface->SetSrcBlendFunction(windata->surface, DSBF_DESTCOLOR));
        SDL_DFB_CHECK(windata->surface->SetDstBlendFunction(windata->surface, DSBF_ZERO));
        SDL_DFB_CHECK(windata->surface->SetBlittingFlags(windata->surface, DSBLIT_BLEND_ALPHACHANNEL));
#if (DFB_VERSION_ATLEAST(1,2,0))
        SDL_DFB_CHECK(windata->surface->SetRenderOptions(windata->surface, DSRO_NONE));
#endif
        SDL_DFB_CHECK(windata->surface->Blit(windata->surface, shape_data->surface, NULL, 0, 0));
    }

    /* Send the data to the display */
    SDL_DFB_CHECK(windata->window_surface->Flip(windata->window_surface, NULL,
                                                data->flipflags));
}

static void
DirectFB_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    DirectFB_TextureData *data = (DirectFB_TextureData *) texture->driverdata;

    DirectFB_ActivateRenderer(renderer);

    if (!data) {
        return;
    }
    SDL_DFB_RELEASE(data->palette);
    SDL_DFB_RELEASE(data->surface);
    if (data->display) {
        DFB_DisplayData *dispdata =
            (DFB_DisplayData *) data->display->driverdata;
        dispdata->vidIDinuse = 0;
        /* FIXME: Shouldn't we reset the cooperative level */
        SDL_DFB_CHECK(dispdata->vidlayer->SetCooperativeLevel(dispdata->vidlayer,
                                                DLSCL_ADMINISTRATIVE));
        SDL_DFB_RELEASE(dispdata->vidlayer);
    }
    SDL_DFB_FREE(data->pixels);
    SDL_free(data);
    texture->driverdata = NULL;
}

static void
DirectFB_DestroyRenderer(SDL_Renderer * renderer)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(data->window);
#if 0
    if (display->palette) {
        SDL_DelPaletteWatch(display->palette, DisplayPaletteChanged, data);
    }
#endif

    SDL_free(data);
    SDL_free(renderer);
}

static int
DirectFB_UpdateViewport(SDL_Renderer * renderer)
{
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *winsurf = data->target;
    DFBRegion dreg;

    dreg.x1 = renderer->viewport.x;
    dreg.y1 = renderer->viewport.y;
    dreg.x2 = dreg.x1 + renderer->viewport.w - 1;
    dreg.y2 = dreg.y1 + renderer->viewport.h - 1;

    winsurf->SetClip(winsurf, &dreg);
    return 0;
}

static int
DirectFB_UpdateClipRect(SDL_Renderer * renderer)
{
    const SDL_Rect *rect = &renderer->clip_rect;
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *destsurf = get_dfb_surface(data->window);
    DFBRegion region;

    if (!SDL_RectEmpty(rect)) {
        region.x1 = rect->x;
        region.x2 = rect->x + rect->w;
        region.y1 = rect->y;
        region.y2 = rect->y + rect->h;
        SDL_DFB_CHECKERR(destsurf->SetClip(destsurf, &region));
    } else {
        SDL_DFB_CHECKERR(destsurf->SetClip(destsurf, NULL));
    }
    return 0;
  error:
    return -1;
}

static int
DirectFB_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
                     Uint32 format, void * pixels, int pitch)
{
    Uint32 sdl_format;
    unsigned char* laypixels;
    int laypitch;
    DFBSurfacePixelFormat dfb_format;
    DirectFB_RenderData *data = (DirectFB_RenderData *) renderer->driverdata;
    IDirectFBSurface *winsurf = data->target;

    DirectFB_ActivateRenderer(renderer);

    winsurf->GetPixelFormat(winsurf, &dfb_format);
    sdl_format = DirectFB_DFBToSDLPixelFormat(dfb_format);
    winsurf->Lock(winsurf, DSLF_READ, (void **) &laypixels, &laypitch);

    laypixels += (rect->y * laypitch + rect->x * SDL_BYTESPERPIXEL(sdl_format) );
    SDL_ConvertPixels(rect->w, rect->h,
                      sdl_format, laypixels, laypitch,
                      format, pixels, pitch);

    winsurf->Unlock(winsurf);

    return 0;
}

#if 0
static int
DirectFB_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
                      Uint32 format, const void * pixels, int pitch)
{
    SDL_Window *window = renderer->window;
    SDL_DFB_WINDOWDATA(window);
    Uint32 sdl_format;
    unsigned char* laypixels;
    int laypitch;
    DFBSurfacePixelFormat dfb_format;

    SDL_DFB_CHECK(windata->surface->GetPixelFormat(windata->surface, &dfb_format));
    sdl_format = DirectFB_DFBToSDLPixelFormat(dfb_format);

    SDL_DFB_CHECK(windata->surface->Lock(windata->surface, DSLF_WRITE, (void **) &laypixels, &laypitch));

    laypixels += (rect->y * laypitch + rect->x * SDL_BYTESPERPIXEL(sdl_format) );
    SDL_ConvertPixels(rect->w, rect->h,
                      format, pixels, pitch,
                      sdl_format, laypixels, laypitch);

    SDL_DFB_CHECK(windata->surface->Unlock(windata->surface));

    return 0;
}
#endif

#endif /* SDL_VIDEO_DRIVER_DIRECTFB */

/* vi: set ts=4 sw=4 expandtab: */