C++ IDirectFBSurface::GetPalette方法代码示例

void QDirectFBPixmapData::copy(const QPixmapData *data, const QRect &rect)
{
    if (data->classId() != DirectFBClass) {
        QPixmapData::copy(data, rect);
        return;
    }

    IDirectFBSurface *src = static_cast<const QDirectFBPixmapData*>(data)->surface;

    DFBSurfaceDescription description;
    description.flags = DFBSurfaceDescriptionFlags(DSDESC_WIDTH |
                                                   DSDESC_HEIGHT |
                                                   DSDESC_PIXELFORMAT);
    description.width = rect.width();
    description.height = rect.height();
    src->GetPixelFormat(src, &description.pixelformat);

    IDirectFB *fb = QDirectFBScreen::instance()->dfb();

    DFBResult result = fb->CreateSurface(fb, &description, &surface);
    if (result != DFB_OK) {
        DirectFBError("QDirectFBPixmapData::copy()", result);
        setSerialNumber(0);
        return;
    }

#ifndef QT_NO_DIRECTFB_PALETTE
    IDirectFBPalette *palette;
    src->GetPalette(src, &palette);
    surface->SetPalette(surface, palette);
#endif

    surface->SetBlittingFlags(surface, DSBLIT_NOFX);
    const DFBRectangle blitRect = { rect.x(), rect.y(),
                                    rect.width(), rect.height() };
    result = surface->Blit(surface, src, &blitRect, 0, 0);
    if (result != DFB_OK)
        DirectFBError("QDirectFBPixmapData::copy()", result);

    setSerialNumber(++global_ser_no);
}

//.........这里部分代码省略.........
            //  We want to create an Image Provider tied to a directfb data buffer.
            //  DirectFB will find (or not) an Image Provider for the data type
            //  depending on Image Providers probe method (sniffing data headers)
            DFBCHECK (databuffer->CreateImageProvider (databuffer, &provider));
        }
        else {
#       ifdef   USE_PACKET_BUILDER_ONLY
            DFBFAIL(rle_build_databuffer_err);
#       else
            //  We could also create an Image Provider by passing a filename.
            //  DirectFB will find (or not) an Image Provider matching the file type.
            DFBCHECK (dfb->CreateImageProvider (dfb, filename, &provider));
#       endif
        }



        //    Get a surface description from the provider. It will contain the width,
        //    height, bits per pixel and the flag for an alphachannel if the image
        //    has one. If the image has no alphachannel the bits per pixel is set to
        //    the bits per pixel of the primary layer to use simple blitting without
        //    pixel format conversion.
        DFBCHECK (provider->GetSurfaceDescription (provider, &surface_dsc));

        //    Create a surface based on the description of the provider.
        DFBCHECK (dfb->CreateSurface( dfb, &surface_dsc, &logo ));

        //    Let the provider render to our surface. Image providers are supposed
        //    to support every destination pixel format and size. If the size
        //    differs the image will be scaled (bilinear). The last parameter allows
        //    to specify an optional destination rectangle. We use NULL here so that
        //    our image covers the whole logo surface.
        DFBCHECK (provider->RenderTo (provider, logo, NULL));
        //    Note: RLE Image Provider allows for direct non-scaled LUT-8 surface
        //          rendering without any attached colormap.

        #ifdef CLEVER_APPROACH
        //    Let's setup our logo surface palette outside of the RLE Image
        //    Provider if we got a colormap from rle_build_databuffer ...
        if (color_palette)
        {
            IDirectFBPalette *palette;
            DFBCHECK (logo->GetPalette (logo, &palette));
            palette->SetEntries (palette, color_palette, number_of_colors, 0);
            palette->Release (palette);
        }
        #endif

        //
        //  --- WE GET RID OF OUR IMAGE PROVIDER INSTANCE HERE
        //
        //    Release the provider, we don't need it anymore.
        provider->Release (provider);           provider    = NULL;
        //    Destroy the databuffer as well, we don't need it anymore.
        rle_destroy_databuffer (databuffer);    databuffer  = NULL;


#   ifndef SUBTITLES_MODE
        //    We want to let the logo slide in on the left and slide out on the
        //    right.
        for (i = -surface_dsc.width; i < screen_width; i++)
#   else
        //    We want to let the logo slide in on the right and slide out on the
        //    left.
        for (i = screen_width-1; i >= -surface_dsc.width; i--)
#   endif
        {
            //    Clear the screen.
            DFBCHECK (primary->FillRectangle (primary, 0, 0,
                                              screen_width, screen_height));

            //    Blit the logo vertically centered with "i" as the X coordinate.
            //    NULL means that we want to blit the whole surface.
            DFBCHECK (primary->Blit (primary, logo, NULL, i,
                                     (screen_height - surface_dsc.height) / 2));

            //    Flip the front and back buffer, but wait for the vertical
            //    retrace to avoid tearing.
            DFBCHECK (primary->Flip (primary, NULL, DSFLIP_WAITFORSYNC));

            if (argc < 3)
            {
                usleep(1000*5);
            }
        }

        //    Release the image.
        if (logo)
        {
            logo->Release (logo);
        }

   }

   //    Release everything else
   primary->Release (primary);
   dfb->Release (dfb);

   return 0;
}