savage_xmesa.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

static void
savageDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
{
   _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
}

#if 0
void XMesaSwapBuffers(__DRIdrawablePrivate *driDrawPriv)
{
   /* XXX should do swap according to the buffer, not the context! */
   savageContextPtr imesa = savageCtx; 

   FLUSH_VB( imesa->glCtx, "swap buffers" );
   savageSwapBuffers(imesa);
}
#endif


void savageXMesaSetClipRects(savageContextPtr imesa)
{
   __DRIdrawablePrivate *dPriv = imesa->driDrawable;

   if ((dPriv->numBackClipRects == 0)
       || (imesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT)) {
      imesa->numClipRects = dPriv->numClipRects;
      imesa->pClipRects = dPriv->pClipRects;
      imesa->drawX = dPriv->x;
      imesa->drawY = dPriv->y;
   } else {
      imesa->numClipRects = dPriv->numBackClipRects;
      imesa->pClipRects = dPriv->pBackClipRects;
      imesa->drawX = dPriv->backX;
      imesa->drawY = dPriv->backY;
   }

   savageCalcViewport( imesa->glCtx );
}


static void savageXMesaWindowMoved( savageContextPtr imesa ) 
{
   __DRIdrawablePrivate *const drawable = imesa->driDrawable;
   __DRIdrawablePrivate *const readable = imesa->driReadable;

   if (0)
      fprintf(stderr, "savageXMesaWindowMoved\n\n");

   savageXMesaSetClipRects(imesa);

   driUpdateFramebufferSize(imesa->glCtx, drawable);
   if (drawable != readable) {
      driUpdateFramebufferSize(imesa->glCtx, readable);
   }
}


static GLboolean
savageUnbindContext(__DRIcontextPrivate *driContextPriv)
{
   savageContextPtr savage = (savageContextPtr) driContextPriv->driverPrivate;
   if (savage)
      savage->dirty = ~0;

   return GL_TRUE;
}

#if 0
static GLboolean
savageOpenFullScreen(__DRIcontextPrivate *driContextPriv)
{
    
  
    
    if (driContextPriv) {
      savageContextPtr imesa = (savageContextPtr) driContextPriv->driverPrivate;
      imesa->IsFullScreen = GL_TRUE;
      imesa->backup_frontOffset = imesa->savageScreen->frontOffset;
      imesa->backup_backOffset = imesa->savageScreen->backOffset;
      imesa->backup_frontBitmapDesc = imesa->savageScreen->frontBitmapDesc;
      imesa->savageScreen->frontBitmapDesc = imesa->savageScreen->backBitmapDesc;      
      imesa->toggle = TARGET_BACK;
   }

    return GL_TRUE;
}

static GLboolean
savageCloseFullScreen(__DRIcontextPrivate *driContextPriv)
{
    
    if (driContextPriv) {
      savageContextPtr imesa = (savageContextPtr) driContextPriv->driverPrivate;
      WAIT_IDLE_EMPTY(imesa);
      imesa->IsFullScreen = GL_FALSE;   
      imesa->savageScreen->frontOffset = imesa->backup_frontOffset;
      imesa->savageScreen->backOffset = imesa->backup_backOffset;
      imesa->savageScreen->frontBitmapDesc = imesa->backup_frontBitmapDesc;
   }
    return GL_TRUE;
}
#endif

static GLboolean
savageMakeCurrent(__DRIcontextPrivate *driContextPriv,
		  __DRIdrawablePrivate *driDrawPriv,
		  __DRIdrawablePrivate *driReadPriv)
{
   if (driContextPriv) {
      savageContextPtr imesa
         = (savageContextPtr) driContextPriv->driverPrivate;
      struct gl_framebuffer *drawBuffer
         = (GLframebuffer *) driDrawPriv->driverPrivate;
      struct gl_framebuffer *readBuffer
         = (GLframebuffer *) driReadPriv->driverPrivate;
      driRenderbuffer *frontRb = (driRenderbuffer *)
         drawBuffer->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
      driRenderbuffer *backRb = (driRenderbuffer *)
         drawBuffer->Attachment[BUFFER_BACK_LEFT].Renderbuffer;

      assert(frontRb->Base.Data);
      if (imesa->glCtx->Visual.doubleBufferMode) {
         assert(backRb->Base.Data);
      }

      imesa->driReadable = driReadPriv;
      imesa->driDrawable = driDrawPriv;
      imesa->dirty = ~0;
      
      _mesa_make_current(imesa->glCtx, drawBuffer, readBuffer);
      
      savageXMesaWindowMoved( imesa );
   }
   else 
   {
      _mesa_make_current(NULL, NULL, NULL);
   }
   return GL_TRUE;
}


void savageGetLock( savageContextPtr imesa, GLuint flags ) 
{
   __DRIdrawablePrivate *const drawable = imesa->driDrawable;
   __DRIdrawablePrivate *const readable = imesa->driReadable;
   __DRIscreenPrivate *sPriv = imesa->driScreen;
   drm_savage_sarea_t *sarea = imesa->sarea;
   int me = imesa->hHWContext;
   int stamp = drawable->lastStamp; 
   int heap;
   unsigned int timestamp = 0;

  

   /* We know there has been contention.
    */
   drmGetLock(imesa->driFd, imesa->hHWContext, flags);	


   /* Note contention for throttling hint
    */
   imesa->any_contend = 1;

   /* If the window moved, may need to set a new cliprect now.
    *
    * NOTE: This releases and regains the hw lock, so all state
    * checking must be done *after* this call:
    */
   DRI_VALIDATE_DRAWABLE_INFO(sPriv, drawable);
   if (drawable != readable) {
      DRI_VALIDATE_DRAWABLE_INFO(sPriv, readable);
   }


   /* If we lost context, need to dump all registers to hardware.
    * Note that we don't care about 2d contexts, even if they perform
    * accelerated commands, so the DRI locking in the X server is even
    * more broken than usual.
    */
   if (sarea->ctxOwner != me) {
      imesa->dirty |= (SAVAGE_UPLOAD_LOCAL |
		       SAVAGE_UPLOAD_GLOBAL |
		       SAVAGE_UPLOAD_FOGTBL |
		       SAVAGE_UPLOAD_TEX0 |
		       SAVAGE_UPLOAD_TEX1 |
		       SAVAGE_UPLOAD_TEXGLOBAL);
      imesa->lostContext = GL_TRUE;
      sarea->ctxOwner = me;
   }

   for (heap = 0; heap < imesa->lastTexHeap; ++heap) {
      /* If a heap was changed, update its timestamp. Do this before
       * DRI_AGE_TEXTURES updates the local_age. */
      if (imesa->textureHeaps[heap] &&
	  imesa->textureHeaps[heap]->global_age[0] >
	  imesa->textureHeaps[heap]->local_age) {
	 if (timestamp == 0)
	    timestamp = savageEmitEventLocked(imesa, 0);
	 imesa->textureHeaps[heap]->timestamp = timestamp;
      }
      DRI_AGE_TEXTURES( imesa->textureHeaps[heap] );
   }

   if (drawable->lastStamp != stamp) {
      driUpdateFramebufferSize(imesa->glCtx, drawable);
      savageXMesaWindowMoved( imesa );
   }
}

static const  __DRIconfig **
savageFillInModes( __DRIscreenPrivate *psp,
		   unsigned pixel_bits, unsigned depth_bits,
		   unsigned stencil_bits, GLboolean have_back_buffer )
{
    __DRIconfig **configs;
    __GLcontextModes * m;
    unsigned depth_buffer_factor;
    unsigned back_buffer_factor;
    GLenum fb_format;
    GLenum fb_type;
    int i;

    /* Right now GLX_SWAP_COPY_OML isn't supported, but it would be easy
     * enough to add support.  Basically, if a context is created with an
     * fbconfig where the swap method is GLX_SWAP_COPY_OML, pageflipping
     * will never be used.
     *
     * FK: What about drivers that don't use page flipping? Could they
     * just expose GLX_SWAP_COPY_OML?
     */
    static const GLenum back_buffer_modes[] = {
	GLX_NONE, GLX_SWAP_UNDEFINED_OML /*, GLX_SWAP_COPY_OML */
    };

    u_int8_t depth_bits_array[2];
    u_int8_t stencil_bits_array[2];


    depth_bits_array[0] = depth_bits;
    depth_bits_array[1] = depth_bits;
    
    /* Just like with the accumulation buffer, always provide some modes
     * with a stencil buffer.  It will be a sw fallback, but some apps won't
     * care about that.
     */
    stencil_bits_array[0] = 0;
    stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;

    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 2 : 1;
    back_buffer_factor  = (have_back_buffer) ? 2 : 1;

    if ( pixel_bits == 16 ) {
        fb_format = GL_RGB;
        fb_type = GL_UNSIGNED_SHORT_5_6_5;
    }
    else {
        fb_format = GL_BGR;
        fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
    }

    configs = driCreateConfigs(fb_format, fb_type,
			       depth_bits_array, stencil_bits_array,
			       depth_buffer_factor,
			       back_buffer_modes, back_buffer_factor);
    if (configs == NULL) {
	fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
		 __func__, __LINE__ );
	return NULL;
    }

    /* Mark the visual as slow if there are "fake" stencil bits.
     */
    for (i = 0; configs[i]; i++) {
	m = &configs[i]->modes;
	if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
	    m->visualRating = GLX_SLOW_CONFIG;
	}
    }

    return (const __DRIconfig **) configs;
}


/**
 * This is the driver specific part of the createNewScreen entry point.
 * 
 * \todo maybe fold this into intelInitDriver
 *
 * \return the __GLcontextModes supported by this driver
 */
static const __DRIconfig **
savageInitScreen(__DRIscreenPrivate *psp)
{
   static const __DRIversion ddx_expected = { 2, 0, 0 };
   static const __DRIversion dri_expected = { 4, 0, 0 };
   static const __DRIversion drm_expected = { 2, 1, 0 };
   SAVAGEDRIPtr dri_priv = (SAVAGEDRIPtr)psp->pDevPriv;

   if ( ! driCheckDriDdxDrmVersions2( "Savage",
				      &psp->dri_version, & dri_expected,
				      &psp->ddx_version, & ddx_expected,
				      &psp->drm_version, & drm_expected ) )
      return NULL;

   /* Calling driInitExtensions here, with a NULL context pointer,
    * does not actually enable the extensions.  It just makes sure
    * that all the dispatch offsets for all the extensions that
    * *might* be enables are known.  This is needed because the
    * dispatch offsets need to be known when _mesa_context_create is
    * called, but we can't enable the extensions until we have a
    * context pointer.
    *
    * Hello chicken.  Hello egg.  How are you two today?
    */
   driInitExtensions( NULL, card_extensions, GL_FALSE );

   if (!savageInitDriver(psp))
       return NULL;

   return savageFillInModes( psp,
			     dri_priv->cpp*8,
			     (dri_priv->cpp == 2) ? 16 : 24,
			     (dri_priv->cpp == 2) ? 0  : 8,
			     (dri_priv->backOffset != dri_priv->depthOffset) );
}

const struct __DriverAPIRec driDriverAPI = {
   savageInitScreen, 
   savageDestroyScreen,
   savageCreateContext,
   savageDestroyContext,
   savageCreateBuffer,
   savageDestroyBuffer,
   savageSwapBuffers,
   savageMakeCurrent,
   savageUnbindContext
};