C++ SDL_DFB_CHECKERR函数代码示例

void
DirectFB_GL_SwapWindow(_THIS, SDL_Window * window)
{
    SDL_DFB_WINDOWDATA(window);
    DFBRegion region;
    DirectFB_GLContext *p;

    region.x1 = 0;
    region.y1 = 0;
    region.x2 = window->w;
    region.y2 = window->h;

#if 0
    if (devdata->glFinish)
        devdata->glFinish();
    else if (devdata->glFlush)
        devdata->glFlush();
#endif

    for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
        if (p->sdl_window == window && p->is_locked)
        {
            SDL_DFB_CHECKERR(p->context->Unlock(p->context));
            p->is_locked = 0;
        }

    SDL_DFB_CHECKERR(windata->window_surface->Flip(windata->window_surface,NULL,  DSFLIP_PIPELINE |DSFLIP_BLIT | DSFLIP_ONSYNC ));
    return;
  error:
    return;
}

int
DirectFB_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
{
    //SDL_DFB_WINDOWDATA(window);
    DirectFB_GLContext *ctx = (DirectFB_GLContext *) context;
    DirectFB_GLContext *p;

    for (p = _this->gl_data->firstgl; p; p = p->next)
    {
       if (p->is_locked) {
         SDL_DFB_CHECKERR(p->context->Unlock(p->context));
         p->is_locked = 0;
       }
        
    }

    if (ctx != NULL) {
        SDL_DFB_CHECKERR(ctx->context->Lock(ctx->context));
        ctx->is_locked = 1;
    }

    return 0;
  error:
    return -1;
}

SDL_GLContext
DirectFB_GL_CreateContext(_THIS, SDL_Window * window)
{
    SDL_DFB_WINDOWDATA(window);
    DirectFB_GLContext *context;
    int ret;

    SDL_DFB_CALLOC(context, 1, sizeof(*context));

    SDL_DFB_CHECKERR(windata->surface->GetGL(windata->surface,
                                             &context->context));

    if (!context->context)
        return NULL;

    SDL_DFB_CHECKERR(context->context->Unlock(context->context));

    context->next = _this->gl_data->firstgl;
    _this->gl_data->firstgl = context;

    if (DirectFB_GL_MakeCurrent(_this, window, context) < 0) {
        DirectFB_GL_DeleteContext(_this, context);
        return NULL;
    }

    return context;

  error:
    return NULL;
}

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 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_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 void
CheckSetDisplayMode(_THIS, SDL_VideoDisplay * display, DFB_DisplayData * data, SDL_DisplayMode * mode)
{
    SDL_DFB_DEVICEDATA(_this);
    DFBDisplayLayerConfig config;
    DFBDisplayLayerConfigFlags failed;

    SDL_DFB_CHECKERR(data->layer->SetCooperativeLevel(data->layer,
                                                      DLSCL_ADMINISTRATIVE));
    config.width = mode->w;
    config.height = mode->h;
    config.pixelformat = DirectFB_SDLToDFBPixelFormat(mode->format);
    config.flags = DLCONF_WIDTH | DLCONF_HEIGHT | DLCONF_PIXELFORMAT;
    if (devdata->use_yuv_underlays) {
        config.flags |= DLCONF_OPTIONS;
        config.options = DLOP_ALPHACHANNEL;
    }
    failed = 0;
    data->layer->TestConfiguration(data->layer, &config, &failed);
    SDL_DFB_CHECKERR(data->layer->SetCooperativeLevel(data->layer,
                                                      DLSCL_SHARED));
    if (failed == 0)
    {
        SDL_AddDisplayMode(display, mode);
        SDL_DFB_LOG("Mode %d x %d Added\n", mode->w, mode->h);
    }
    else
        SDL_DFB_ERR("Mode %d x %d not available: %x\n", mode->w,
                      mode->h, failed);

    return;
  error:
    return;
}

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;
    DFBResult ret;
    Uint8 *dpixels;
    int dpitch;
    Uint8 *src, *dst;
    int row;
    size_t length;
    int bpp = DFB_BYTES_PER_PIXEL(SDLToDFBPixelFormat(texture->format));
    // FIXME: SDL_BYTESPERPIXEL(texture->format) broken for yuv yv12 3 planes

    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;
    }
    SDL_DFB_CHECKERR(data->surface->Unlock(data->surface));
    return 0;
  error:
    return 1;

}

static int
DirectFB_AcquireVidLayer(SDL_Renderer * renderer, SDL_Texture * texture)
{
    //SDL_DFB_RENDERERDATA(renderer);
    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_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 SDL_Cursor *
DirectFB_CreateDefaultCursor(void)
{
    SDL_VideoDevice *dev = SDL_GetVideoDevice();

    SDL_DFB_DEVICEDATA(dev);
    DFB_CursorData *curdata;
    DFBResult ret;
    DFBSurfaceDescription dsc;
    SDL_Cursor *cursor;
    Uint32 *dest;
    Uint32 *p;
    int pitch, i, j;

    SDL_DFB_ALLOC_CLEAR( cursor, sizeof(*cursor));
    SDL_DFB_ALLOC_CLEAR(curdata, sizeof(*curdata));

    dsc.flags =
        DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
    dsc.caps = DSCAPS_VIDEOONLY;
    dsc.width = 32;
    dsc.height = 32;
    dsc.pixelformat = DSPF_ARGB;

    SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc,
                                                 &curdata->surf));
    curdata->hotx = 0;
    curdata->hoty = 0;
    cursor->driverdata = curdata;

    SDL_DFB_CHECKERR(curdata->surf->Lock(curdata->surf, DSLF_WRITE,
                                         (void *) &dest, &pitch));

    /* Relies on the fact that this is only called with ARGB surface. */
    for (i = 0; i < 32; i++)
    {
        for (j = 0; j < 32; j++)
        {
            switch (arrow[i][j])
            {
            case ' ': dest[j] = 0x00000000; break;
            case '.': dest[j] = 0xffffffff; break;
            case 'X': dest[j] = 0xff000000; break;
            }
        }
        dest += (pitch >> 2);
    }

    curdata->surf->Unlock(curdata->surf);
    return cursor;
  error:
    return NULL;
}

void
DirectFB_SetWindowIcon(_THIS, SDL_Window * window, SDL_Surface * icon)
{
    SDL_DFB_DEVICEDATA(_this);
    SDL_DFB_WINDOWDATA(window);
    SDL_Surface *surface = NULL;
    DFBResult ret;

    if (icon) {
        SDL_PixelFormat format;
        DFBSurfaceDescription dsc;
        Uint32 *dest;
        Uint32 *p;
        int pitch, i;

        /* Convert the icon to ARGB for modern window managers */
        SDL_InitFormat(&format, 32, 0x00FF0000, 0x0000FF00, 0x000000FF,
                       0xFF000000);
        surface = SDL_ConvertSurface(icon, &format, 0);
        if (!surface) {
            return;
        }
        dsc.flags =
            DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
        dsc.caps = DSCAPS_VIDEOONLY;
        dsc.width = surface->w;
        dsc.height = surface->h;
        dsc.pixelformat = DSPF_ARGB;

        SDL_DFB_CHECKERR(devdata->dfb->CreateSurface(devdata->dfb, &dsc,
                                                     &windata->icon));

        SDL_DFB_CHECKERR(windata->icon->Lock(windata->icon, DSLF_WRITE,
                                             (void *) &dest, &pitch));

        p = surface->pixels;
        for (i = 0; i < surface->h; i++)
            memcpy((char *) dest + i * pitch,
                   (char *) p + i * surface->pitch, 4 * surface->w);

        windata->icon->Unlock(windata->icon);
        SDL_FreeSurface(surface);
    } else {
        SDL_DFB_RELEASE(windata->icon);
    }
    return;
  error:
    if (surface)
        SDL_FreeSurface(surface);
    SDL_DFB_RELEASE(windata->icon);
    return;
}

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;
}

SDL_GLContext
DirectFB_GL_CreateContext(_THIS, SDL_Window * window)
{
    //SDL_DFB_DEVICEDATA(_this);
    SDL_DFB_WINDOWDATA(window);
    DirectFB_GLContext *context;

    SDL_DFB_ALLOC_CLEAR(context, sizeof(DirectFB_GLContext));

    SDL_DFB_CHECKERR(windata->surface->GetGL(windata->surface,
                                             &context->context));

    if (!context->context)
        return NULL;

    context->is_locked = 0;
    context->sdl_window = window;
    
    context->next = _this->gl_data->firstgl;
    _this->gl_data->firstgl = context;

    SDL_DFB_CHECK(context->context->Unlock(context->context));

    if (DirectFB_GL_MakeCurrent(_this, window, context) < 0) {
        DirectFB_GL_DeleteContext(_this, context);
        return NULL;
    }

    return context;

  error:
    return NULL;
}

void
DirectFB_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
{
    SDL_DFB_DEVICEDATA(_this);
    DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;
    SDL_DisplayMode mode;
    struct modes_callback_t data;
    int i;

    data.nummodes = 0;
    /* Enumerate the available fullscreen modes */
    SDL_DFB_CALLOC(data.modelist, DFB_MAX_MODES, sizeof(SDL_DisplayMode));
    SDL_DFB_CHECKERR(devdata->dfb->EnumVideoModes(devdata->dfb,
                                                  EnumModesCallback, &data));

    for (i = 0; i < data.nummodes; ++i) {
        mode = data.modelist[i];

        mode.format = SDL_PIXELFORMAT_ARGB8888;
        CheckSetDisplayMode(_this, display, dispdata, &mode);
        mode.format = SDL_PIXELFORMAT_RGB888;
        CheckSetDisplayMode(_this, display, dispdata, &mode);
        mode.format = SDL_PIXELFORMAT_RGB24;
        CheckSetDisplayMode(_this, display, dispdata, &mode);
        mode.format = SDL_PIXELFORMAT_RGB565;
        CheckSetDisplayMode(_this, display, dispdata, &mode);
        mode.format = SDL_PIXELFORMAT_INDEX8;
        CheckSetDisplayMode(_this, display, dispdata, &mode);
    }

    SDL_DFB_FREE(data.modelist);
error:
    return;
}