intel_ioctl.c

mesa-6.5-minigui源码

   if (intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT) {
      intelScreenPrivate *screen = intel->intelScreen;
      if (screen->current_rotation != 0) {
         __DRIdrawablePrivate *dPriv = intel->driDrawable;
         intelRotateWindow(intel, dPriv, BUFFER_BIT_FRONT_LEFT);
      }
   }
}


/**
 * NOT directly called via glFlush.
 */
void intelFlush( GLcontext *ctx )
{
   intelContextPtr intel = INTEL_CONTEXT( ctx );

   if (intel->Fallback)
      _swrast_flush( ctx );

   INTEL_FIREVERTICES( intel );

   if (intel->batch.size != intel->batch.space)
      intelFlushBatch( intel, GL_FALSE );
}


/**
 * Called via glFlush.
 */
void intelglFlush( GLcontext *ctx )
{
   intelFlush(ctx);
   intelCheckFrontRotate(ctx);
}


void intelFinish( GLcontext *ctx  ) 
{
   intelContextPtr intel = INTEL_CONTEXT( ctx );
   intelFlush( ctx );
   intelWaitForIdle( intel );
   intelCheckFrontRotate(ctx);
}


void intelClear(GLcontext *ctx, GLbitfield mask, GLboolean all,
		GLint cx, GLint cy, GLint cw, GLint ch)
{
   intelContextPtr intel = INTEL_CONTEXT( ctx );
   const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
   GLbitfield tri_mask = 0;
   GLbitfield blit_mask = 0;
   GLbitfield swrast_mask = 0;

   if (0)
      fprintf(stderr, "%s\n", __FUNCTION__);

   /* Take care of cliprects, which are handled differently for
    * clears, etc.
    */
   intelFlush( &intel->ctx );

   if (mask & BUFFER_BIT_FRONT_LEFT) {
      if (colorMask == ~0) {
	 blit_mask |= BUFFER_BIT_FRONT_LEFT;
      } 
      else {
	 tri_mask |= BUFFER_BIT_FRONT_LEFT;
      }
   }

   if (mask & BUFFER_BIT_BACK_LEFT) {
      if (colorMask == ~0) {
	 blit_mask |= BUFFER_BIT_BACK_LEFT;
      } 
      else {
	 tri_mask |= BUFFER_BIT_BACK_LEFT;
      }
   }

   if (mask & BUFFER_BIT_DEPTH) {
      blit_mask |= BUFFER_BIT_DEPTH;
   }

   if (mask & BUFFER_BIT_STENCIL) {
      if (!intel->hw_stencil) {
	 swrast_mask |= BUFFER_BIT_STENCIL;
      }
      else if (ctx->Stencil.WriteMask[0] != 0xff) {
	 tri_mask |= BUFFER_BIT_STENCIL;
      } 
      else {
	 blit_mask |= BUFFER_BIT_STENCIL;
      }
   }

   swrast_mask |= (mask & BUFFER_BIT_ACCUM);

   if (blit_mask) 
      intelClearWithBlit( ctx, blit_mask, all, cx, cy, cw, ch );

   if (tri_mask) 
      intel->vtbl.clear_with_tris( intel, tri_mask, all, cx, cy, cw, ch);

   if (swrast_mask)
      _swrast_Clear( ctx, swrast_mask, all, cx, cy, cw, ch );
}


void
intelRotateWindow(intelContextPtr intel, __DRIdrawablePrivate *dPriv,
                  GLuint srcBuffer)
{
   if (intel->vtbl.rotate_window) {
      intel->vtbl.rotate_window(intel, dPriv, srcBuffer);
   }
}


void *intelAllocateAGP( intelContextPtr intel, GLsizei size )
{
   int region_offset;
   drmI830MemAlloc alloc;
   int ret;

   if (0)
      fprintf(stderr, "%s: %d bytes\n", __FUNCTION__, size);

   alloc.region = I830_MEM_REGION_AGP;
   alloc.alignment = 0;
   alloc.size = size;
   alloc.region_offset = &region_offset;

   LOCK_HARDWARE(intel);

   /* Make sure the global heap is initialized
    */
   if (intel->texture_heaps[0])
      driAgeTextures( intel->texture_heaps[0] );


   ret = drmCommandWriteRead( intel->driFd,
			      DRM_I830_ALLOC,
			      &alloc, sizeof(alloc));
   
   if (ret) {
      fprintf(stderr, "%s: DRM_I830_ALLOC ret %d\n", __FUNCTION__, ret);
      UNLOCK_HARDWARE(intel);
      return NULL;
   }
   
   if (0)
      fprintf(stderr, "%s: allocated %d bytes\n", __FUNCTION__, size);

   /* Need to propogate this information (agp memory in use) to our
    * local texture lru.  The kernel has already updated the global
    * lru.  An alternative would have been to allocate memory the
    * usual way and then notify the kernel to pin the allocation.
    */
   if (intel->texture_heaps[0])
      driAgeTextures( intel->texture_heaps[0] );

   UNLOCK_HARDWARE(intel);   

   return (void *)((char *)intel->intelScreen->tex.map + region_offset);
}

void intelFreeAGP( intelContextPtr intel, void *pointer )
{
   int region_offset;
   drmI830MemFree memfree;
   int ret;

   region_offset = (char *)pointer - (char *)intel->intelScreen->tex.map;

   if (region_offset < 0 || 
       region_offset > intel->intelScreen->tex.size) {
      fprintf(stderr, "offset %d outside range 0..%d\n", region_offset,
	      intel->intelScreen->tex.size);
      return;
   }

   memfree.region = I830_MEM_REGION_AGP;
   memfree.region_offset = region_offset;
   
   ret = drmCommandWrite( intel->driFd,
			  DRM_I830_FREE,
			  &memfree, sizeof(memfree));
   
   if (ret) 
      fprintf(stderr, "%s: DRM_I830_FREE ret %d\n", __FUNCTION__, ret);
}

/* This version of AllocateMemoryMESA allocates only agp memory, and
 * only does so after the point at which the driver has been
 * initialized.
 *
 * Theoretically a valid context isn't required.  However, in this
 * implementation, it is, as I'm using the hardware lock to protect
 * the kernel data structures, and the current context to get the
 * device fd.
 */
void *intelAllocateMemoryMESA(__DRInativeDisplay *dpy, int scrn,
			      GLsizei size, GLfloat readfreq,
			      GLfloat writefreq, GLfloat priority)
{
   GET_CURRENT_CONTEXT(ctx);

   if (INTEL_DEBUG & DEBUG_IOCTL)
      fprintf(stderr, "%s sz %d %f/%f/%f\n", __FUNCTION__, size, readfreq, 
	      writefreq, priority);

   if (getenv("INTEL_NO_ALLOC"))
      return NULL;
   
   if (!ctx || INTEL_CONTEXT(ctx) == 0) 
      return NULL;
   
   return intelAllocateAGP( INTEL_CONTEXT(ctx), size );
}


/* Called via glXFreeMemoryMESA() */
void intelFreeMemoryMESA(__DRInativeDisplay *dpy, int scrn, GLvoid *pointer)
{
   GET_CURRENT_CONTEXT(ctx);
   if (INTEL_DEBUG & DEBUG_IOCTL) 
      fprintf(stderr, "%s %p\n", __FUNCTION__, pointer);

   if (!ctx || INTEL_CONTEXT(ctx) == 0) {
      fprintf(stderr, "%s: no context\n", __FUNCTION__);
      return;
   }

   intelFreeAGP( INTEL_CONTEXT(ctx), pointer );
}

/* Called via glXGetMemoryOffsetMESA() 
 *
 * Returns offset of pointer from the start of agp aperture.
 */
GLuint intelGetMemoryOffsetMESA(__DRInativeDisplay *dpy, int scrn, 
				const GLvoid *pointer)
{
   GET_CURRENT_CONTEXT(ctx);
   intelContextPtr intel;

   if (!ctx || !(intel = INTEL_CONTEXT(ctx)) ) {
      fprintf(stderr, "%s: no context\n", __FUNCTION__);
      return ~0;
   }

   if (!intelIsAgpMemory( intel, pointer, 0 ))
      return ~0;

   return intelAgpOffsetFromVirtual( intel, pointer );
}


GLboolean intelIsAgpMemory( intelContextPtr intel, const GLvoid *pointer,
			   GLint size )
{
   int offset = (char *)pointer - (char *)intel->intelScreen->tex.map;
   int valid = (size >= 0 &&
		offset >= 0 &&
		offset + size < intel->intelScreen->tex.size);

   if (INTEL_DEBUG & DEBUG_IOCTL)
      fprintf(stderr, "intelIsAgpMemory( %p ) : %d\n", pointer, valid );
   
   return valid;
}


GLuint intelAgpOffsetFromVirtual( intelContextPtr intel, const GLvoid *pointer )
{
   int offset = (char *)pointer - (char *)intel->intelScreen->tex.map;

   if (offset < 0 || offset > intel->intelScreen->tex.size)
      return ~0;
   else
      return intel->intelScreen->tex.offset + offset;
}





/* Flip the front & back buffes
 */
void intelPageFlip( const __DRIdrawablePrivate *dPriv )
{
#if 0
   intelContextPtr intel;
   int tmp, ret;

   if (INTEL_DEBUG & DEBUG_IOCTL)
      fprintf(stderr, "%s\n", __FUNCTION__);

   assert(dPriv);
   assert(dPriv->driContextPriv);
   assert(dPriv->driContextPriv->driverPrivate);

   intel = (intelContextPtr) dPriv->driContextPriv->driverPrivate;

   intelFlush( &intel->ctx );
   LOCK_HARDWARE( intel );

   if (dPriv->pClipRects) {
      *(drm_clip_rect_t *)intel->sarea->boxes = dPriv->pClipRects[0];
      intel->sarea->nbox = 1;
   }

   ret = drmCommandNone(intel->driFd, DRM_I830_FLIP); 
   if (ret) {
      fprintf(stderr, "%s: %d\n", __FUNCTION__, ret);
      UNLOCK_HARDWARE( intel );
      exit(1);
   }

   tmp = intel->sarea->last_enqueue;
   intelRefillBatchLocked( intel );
   UNLOCK_HARDWARE( intel );


   intelSetDrawBuffer( &intel->ctx, intel->ctx.Color.DriverDrawBuffer );
#endif
}