Acceleration of 2D operations for kdrive

[Rene Rebe]

On Friday 02 February 2007 09:33:33 Abhinav Duggal wrote:
> Hi all,
>         I have ported kdrive on arm.I want to accelerate the 2D operations
> of drawing lines,rectangles,filling rectangles,blit operations etc using a
> smart graphics accelerator for a SOC on which i am working . I have seen the
> sample drivers for neomagic and nvidia. They are not accelerating primitive
> drawing functions.Can these functions be accelerated?I think kdrive does not
> provide support for accelerating the primitive functions.It does it through
> software only because of overhead in these drawing primitives.
> It only provides supoort for accelerating the ones in the following
> structure
> typedef struct _KaaScreenInfo {
>     int         offsetAlign;
>     int         pitchAlign;
>     int         flags;
> 
>     int         (*markSync) (ScreenPtr pScreen);
>     void        (*waitMarker) (ScreenPtr pScreen, int marker);
> 
>     Bool        (*PrepareSolid) (PixmapPtr      pPixmap,
>                                  int            alu,
>                                  Pixel          planemask,
>                                  Pixel          fg);
>     void        (*Solid) (int x1, int y1, int x2, int y2);
>     void        (*DoneSolid) (void);
> 
>     Bool        (*PrepareCopy) (PixmapPtr       pSrcPixmap,
>                                 PixmapPtr       pDstPixmap,
>                                 Bool            upsidedown,
>                                 Bool            reverse,
>                                 int             alu,
>                                 Pixel           planemask);
>     void        (*Copy) (int    srcX,
>                          int    srcY,
>                          int    dstX,
>                          int    dstY,
>                          int    width,
>                          int    height);
>     void        (*DoneCopy) (void);
> 
>     Bool        (*PrepareBlend) (int            op,
>                                  PicturePtr     pSrcPicture,
>                                  PicturePtr     pDstPicture,
>                                  PixmapPtr      pSrc,
>                                  PixmapPtr      pDst);
>     void        (*Blend) (int   srcX,
>                           int   srcY,
>                           int   dstX,
>                           int   dstY,
>                           int   width,
>                           int   height);
>     void        (*DoneBlend) (void);
> 
>     Bool        (*CheckComposite) (int          op,
>                                    PicturePtr   pSrcPicture,
>                                    PicturePtr   pMaskPicture,
>                                    PicturePtr   pDstPicture);
>     Bool        (*PrepareComposite) (int                op,
>                                      PicturePtr         pSrcPicture,
>                                      PicturePtr         pMaskPicture,
>                                      PicturePtr         pDstPicture,
>                                           PixmapPtr          pSrc,
>                                      PixmapPtr          pMask,
>                                      PixmapPtr          pDst);
>     void        (*Composite) (int       srcX,
>                              int        srcY,
>                              int        maskX,
>                              int        maskY,
>                              int        dstX,
>                              int        dstY,
>                              int        width,
>                              int        height);
>     void        (*DoneComposite) (void);
> 
>     Bool        (*PrepareTrapezoids) (PicturePtr pDstPicture,
>                                       PixmapPtr pDst);
>     void        (*Trapezoids) (KaaTrapezoid      *traps,
>                                int               ntraps);
>     void        (*DoneTrapezoids) (void);
> 
>     Bool        (*UploadToScreen) (PixmapPtr            pDst,
>                                    char                 *src,
>                                    int                  src_pitch);
>     Bool        (*UploadToScratch) (PixmapPtr           pSrc,
>                                    PixmapPtr            pDst);
> } KaaScreenInfoRec, *KaaScreenInfoPtr;
> 
> Is it true?Please help.

Yes, Kdrive was written to accelerate todays desktop and embedded device
graphics. Not lines and rectangles from the 80th.

Yours,


-- 
  René Rebe - ExactCODE GmbH - Europe, Germany, Berlin
  http://exactcode.de | http://t2-project.org | http://rene.rebe.name
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