fo_state_emit.c

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/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 *
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 * permit persons to whom the Software is furnished to do so, subject to
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 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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/* Authors:  Keith Whitwell <keith@tungstengraphics.com>
 */

#include "fo_context.h"

/* This looks like a lot of work at the moment - we're keeping a
 * duplicate copy of the state up-to-date.  
 *
 * This can change in two ways:
 * - With constant state objects we would only need to save a pointer,
 *     not the whole object.
 * - By adding a callback in the state tracker to re-emit state.  The
 *     state tracker knows the current state already and can re-emit it 
 *     without additional complexity.
 *
 * This works as a proof-of-concept, but a final version will have
 * lower overheads.
 */


/* Bring the software pipe uptodate with current state.
 * 
 * With constant state objects we would probably just send all state
 * to both rasterizers all the time???
 */
void
failover_state_emit( struct failover_context *failover )
{
   if (failover->dirty & FO_NEW_BLEND)
      failover->sw->bind_blend_state( failover->sw,
                                      failover->blend->sw_state );

   if (failover->dirty & FO_NEW_BLEND_COLOR)
      failover->sw->set_blend_color( failover->sw, &failover->blend_color );

   if (failover->dirty & FO_NEW_CLIP)
      failover->sw->set_clip_state( failover->sw, &failover->clip );

   if (failover->dirty & FO_NEW_DEPTH_STENCIL)
      failover->sw->bind_depth_stencil_alpha_state( failover->sw,
                                                    failover->depth_stencil->sw_state );

   if (failover->dirty & FO_NEW_FRAMEBUFFER)
      failover->sw->set_framebuffer_state( failover->sw, &failover->framebuffer );

   if (failover->dirty & FO_NEW_FRAGMENT_SHADER)
      failover->sw->bind_fs_state( failover->sw,
                                   failover->fragment_shader->sw_state );

   if (failover->dirty & FO_NEW_VERTEX_SHADER)
      failover->sw->bind_vs_state( failover->sw,
                                   failover->vertex_shader->sw_state );

   if (failover->dirty & FO_NEW_STIPPLE)
      failover->sw->set_polygon_stipple( failover->sw, &failover->poly_stipple );

   if (failover->dirty & FO_NEW_RASTERIZER)
      failover->sw->bind_rasterizer_state( failover->sw,
                                           failover->rasterizer->sw_state );

   if (failover->dirty & FO_NEW_SCISSOR)
      failover->sw->set_scissor_state( failover->sw, &failover->scissor );

   if (failover->dirty & FO_NEW_VIEWPORT)
      failover->sw->set_viewport_state( failover->sw, &failover->viewport );

   if (failover->dirty & FO_NEW_SAMPLER) {
      failover->sw->bind_sampler_states( failover->sw, failover->num_samplers,
                                         failover->sw_sampler_state );
   }

   if (failover->dirty & FO_NEW_TEXTURE) {
      failover->sw->set_sampler_textures( failover->sw, failover->num_textures, 
                                          failover->texture );
   }

   if (failover->dirty & FO_NEW_VERTEX_BUFFER) {
      failover->sw->set_vertex_buffers( failover->sw,
                                        failover->num_vertex_buffers,
                                        failover->vertex_buffers );
   }

   if (failover->dirty & FO_NEW_VERTEX_ELEMENT) {
      failover->sw->set_vertex_elements( failover->sw,
                                         failover->num_vertex_elements,
                                         failover->vertex_elements );
   }

   failover->dirty = 0;
}

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