/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

 /*
  * Authors:
  *   Keith Whitwell <keith@tungstengraphics.com>
  *   Brian Paul
  */

#include "main/glheader.h"
#include "main/macros.h"
#include "main/context.h"
#include "st_context.h"
#include "st_cb_flush.h"
#include "st_cb_fbo.h"
#include "st_public.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_winsys.h"


void st_flush( struct st_context *st, uint pipeFlushFlags )
{
   GLframebuffer *fb = st->ctx->DrawBuffer;

   FLUSH_VERTICES(st->ctx, 0);

   /* If there has been no rendering to the frontbuffer, consider
    * short-circuiting this, or perhaps pass an "optional" flag down
    * to the driver so that it can make the decision.
    */
   st->pipe->flush( st->pipe, pipeFlushFlags );

   if (!fb)
      return;

   /* XXX: temporary hack.  This flag should only be set if we do any
    * rendering to the front buffer.
    */
   st->flags.frontbuffer_dirty
      = (fb->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_LEFT);

   if (st->flags.frontbuffer_dirty) {
      struct st_renderbuffer *strb
         = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
      struct pipe_surface *front_surf = strb->surface;

      /* Hook for copying "fake" frontbuffer if necessary:
       */
      st->pipe->winsys->flush_frontbuffer( st->pipe->winsys, front_surf,
                                           st->pipe->priv );
      st->flags.frontbuffer_dirty = 0;
   }
}


/**
 * Called via ctx->Driver.Flush()
 */
static void st_Flush(GLcontext *ctx)
{
   st_flush(ctx->st, 0x0);
}


/**
 * Called via ctx->Driver.Finish()
 */
static void st_Finish(GLcontext *ctx)
{
   st_flush(ctx->st, PIPE_FLUSH_WAIT);
}


void st_init_flush_functions(struct dd_function_table *functions)
{
   functions->Flush = st_Flush;
   functions->Finish = st_Finish;
}