mach64_screen.c

mesa-6.5-minigui源码

   mach64Screen->AGPMode	= serverInfo->AGPMode;

   mach64Screen->chipset	= serverInfo->chipset;
   mach64Screen->width		= serverInfo->width;
   mach64Screen->height		= serverInfo->height;
   mach64Screen->mem		= serverInfo->mem;
   mach64Screen->cpp		= serverInfo->cpp;

   mach64Screen->frontOffset	= serverInfo->frontOffset;
   mach64Screen->frontPitch	= serverInfo->frontPitch;
   mach64Screen->backOffset	= serverInfo->backOffset;
   mach64Screen->backPitch	= serverInfo->backPitch;
   mach64Screen->depthOffset	= serverInfo->depthOffset;
   mach64Screen->depthPitch	= serverInfo->depthPitch;

   mach64Screen->texOffset[MACH64_CARD_HEAP] = serverInfo->textureOffset;
   mach64Screen->texSize[MACH64_CARD_HEAP] = serverInfo->textureSize;
   mach64Screen->logTexGranularity[MACH64_CARD_HEAP] =
      serverInfo->logTextureGranularity;

   if ( mach64Screen->IsPCI ) {
      mach64Screen->numTexHeaps = MACH64_NR_TEX_HEAPS - 1;
      mach64Screen->firstTexHeap = MACH64_CARD_HEAP;
      mach64Screen->texOffset[MACH64_AGP_HEAP] = 0;
      mach64Screen->texSize[MACH64_AGP_HEAP] = 0;
      mach64Screen->logTexGranularity[MACH64_AGP_HEAP] = 0;
   } else {
      if (mach64Screen->texSize[MACH64_CARD_HEAP] > 0) {
	 mach64Screen->numTexHeaps = MACH64_NR_TEX_HEAPS;
	 mach64Screen->firstTexHeap = MACH64_CARD_HEAP;
      } else {
	 mach64Screen->numTexHeaps = MACH64_NR_TEX_HEAPS - 1;
	 mach64Screen->firstTexHeap = MACH64_AGP_HEAP;
      }
      mach64Screen->texOffset[MACH64_AGP_HEAP] = serverInfo->agpTextureOffset;
      mach64Screen->texSize[MACH64_AGP_HEAP] = serverInfo->agpSize;
      mach64Screen->logTexGranularity[MACH64_AGP_HEAP] = serverInfo->logAgpTextureGranularity;
   }

   mach64Screen->driScreen = sPriv;

   if ( glx_enable_extension != NULL ) {
      if ( mach64Screen->irq != 0 ) {
	 (*glx_enable_extension)( psc, "GLX_SGI_swap_control" );
	 (*glx_enable_extension)( psc, "GLX_SGI_video_sync" );
	 (*glx_enable_extension)( psc, "GLX_MESA_swap_control" );
      }

      (*glx_enable_extension)( psc, "GLX_MESA_swap_frame_usage" );
   }

   return mach64Screen;
}

/* Destroy the device specific screen private data struct.
 */
static void
mach64DestroyScreen( __DRIscreenPrivate *driScreen )
{
   mach64ScreenRec *mach64Screen = (mach64ScreenRec *) driScreen->private;

   if ( !mach64Screen )
      return;

   if ( MACH64_DEBUG & DEBUG_VERBOSE_DRI ) 
      fprintf( stderr, "%s\n", __FUNCTION__ );

   if ( !mach64Screen->IsPCI ) {
      drmUnmap( (drmAddress)mach64Screen->agpTextures.map,
		mach64Screen->agpTextures.size );
   }

   drmUnmapBufs( mach64Screen->buffers );
   drmUnmap( (drmAddress)mach64Screen->mmio.map, mach64Screen->mmio.size );

   FREE( mach64Screen );
   driScreen->private = NULL;
}


/* Create and initialize the Mesa and driver specific pixmap buffer
 * data.
 */
static GLboolean
mach64CreateBuffer( __DRIscreenPrivate *driScrnPriv,
		    __DRIdrawablePrivate *driDrawPriv,
		    const __GLcontextModes *mesaVis,
		    GLboolean isPixmap )
{
   mach64ScreenPtr screen = (mach64ScreenPtr) driScrnPriv->private;

   if (isPixmap) {
      return GL_FALSE; /* not implemented */
   }
   else {
      struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);

      {
         driRenderbuffer *frontRb
            = driNewRenderbuffer(GL_RGBA,
                                 NULL,
                                 screen->cpp,
                                 screen->frontOffset, screen->frontPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(frontRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
      }

      if (mesaVis->doubleBufferMode) {
         driRenderbuffer *backRb
            = driNewRenderbuffer(GL_RGBA,
                                 NULL,
                                 screen->cpp,
                                 screen->backOffset, screen->backPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(backRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
      }

      if (mesaVis->depthBits == 16) {
         driRenderbuffer *depthRb
            = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
                                 NULL, screen->cpp,
                                 screen->depthOffset, screen->depthPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(depthRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }
      else if (mesaVis->depthBits == 24) {
         /* XXX I don't think 24-bit Z is supported - so this isn't used */
         driRenderbuffer *depthRb
            = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
                                 NULL,
                                 screen->cpp,
                                 screen->depthOffset, screen->depthPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(depthRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }

      _mesa_add_soft_renderbuffers(fb,
                                   GL_FALSE, /* color */
                                   GL_FALSE, /* depth */
                                   mesaVis->stencilBits > 0,
                                   mesaVis->accumRedBits > 0,
                                   GL_FALSE, /* alpha */
                                   GL_FALSE /* aux */);
      driDrawPriv->driverPrivate = (void *) fb;

      return (driDrawPriv->driverPrivate != NULL);
   }
}


static void
mach64DestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
{
   _mesa_destroy_framebuffer((GLframebuffer *) (driDrawPriv->driverPrivate));
}


/* Copy the back color buffer to the front color buffer */
static void
mach64SwapBuffers(__DRIdrawablePrivate *dPriv)
{
   if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
      mach64ContextPtr mmesa;
      GLcontext *ctx;
      mmesa = (mach64ContextPtr) dPriv->driContextPriv->driverPrivate;
      ctx = mmesa->glCtx;
      if (ctx->Visual.doubleBufferMode) {
         _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
         mach64CopyBuffer( dPriv );
      }
   }
   else {
      /* XXX this shouldn't be an error but we can't handle it for now */
      _mesa_problem(NULL, "%s: drawable has no context!", __FUNCTION__);
   }
}


/* Initialize the driver specific screen private data.
 */
static GLboolean
mach64InitDriver( __DRIscreenPrivate *driScreen )
{
   driScreen->private = (void *) mach64CreateScreen( driScreen );

   if ( !driScreen->private ) {
      mach64DestroyScreen( driScreen );
      return GL_FALSE;
   }

   return GL_TRUE;
}


static struct __DriverAPIRec mach64API = {
   .InitDriver      = mach64InitDriver,
   .DestroyScreen   = mach64DestroyScreen,
   .CreateContext   = mach64CreateContext,
   .DestroyContext  = mach64DestroyContext,
   .CreateBuffer    = mach64CreateBuffer,
   .DestroyBuffer   = mach64DestroyBuffer,
   .SwapBuffers     = mach64SwapBuffers,
   .MakeCurrent     = mach64MakeCurrent,
   .UnbindContext   = mach64UnbindContext,
   .GetSwapInfo     = NULL,
   .GetMSC          = driGetMSC32,
   .WaitForMSC      = driWaitForMSC32,
   .WaitForSBC      = NULL,
   .SwapBuffersMSC  = NULL
};


/**
 * This is the bootstrap function for the driver.  libGL supplies all of the
 * requisite information about the system, and the driver initializes itself.
 * This routine also fills in the linked list pointed to by \c driver_modes
 * with the \c __GLcontextModes that the driver can support for windows or
 * pbuffers.
 * 
 * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on 
 *         failure.
 */
PUBLIC
void * __driCreateNewScreen_20050727( __DRInativeDisplay *dpy, int scrn, __DRIscreen *psc,
			     const __GLcontextModes * modes,
			     const __DRIversion * ddx_version,
			     const __DRIversion * dri_version,
			     const __DRIversion * drm_version,
			     const __DRIframebuffer * frame_buffer,
			     drmAddress pSAREA, int fd, 
			     int internal_api_version,
			     const __DRIinterfaceMethods * interface,
			     __GLcontextModes ** driver_modes )
			     
{
   __DRIscreenPrivate *psp;
   static const __DRIversion ddx_expected = { 6, 4, 0 };
   static const __DRIversion dri_expected = { 4, 0, 0 };
   static const __DRIversion drm_expected = { 1, 0, 0 };

   dri_interface = interface;

   if ( ! driCheckDriDdxDrmVersions2( "Mach64",
				      dri_version, & dri_expected,
				      ddx_version, & ddx_expected,
				      drm_version, & drm_expected ) ) {
      return NULL;
   }

   psp = __driUtilCreateNewScreen(dpy, scrn, psc, NULL,
				  ddx_version, dri_version, drm_version,
				  frame_buffer, pSAREA, fd,
				  internal_api_version, &mach64API);
   if ( psp != NULL ) {
      ATIDRIPtr dri_priv = (ATIDRIPtr) psp->pDevPriv;
      *driver_modes = mach64FillInModes( dri_priv->cpp * 8,
					 16,
					 0,
					 1);

      /* 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 );
   }

   return (void *) psp;
}