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/**************************************************************************
*
* Copyright 2003 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.
*
**************************************************************************/
#include "pipe/p_defines.h"
#include "util/u_simple_screen.h"
#include "util/u_memory.h"
#include "pipe/p_context.h"
#include "fo_context.h"
#include "fo_winsys.h"
static void failover_destroy( struct pipe_context *pipe )
{
struct failover_context *failover = failover_context( pipe );
free( failover );
}
void failover_fail_over( struct failover_context *failover )
{
failover->dirty = TRUE;
failover->mode = FO_SW;
}
static void failover_draw_elements( struct pipe_context *pipe,
struct pipe_buffer *indexBuffer,
unsigned indexSize,
unsigned prim,
unsigned start,
unsigned count)
{
struct failover_context *failover = failover_context( pipe );
/* If there has been any statechange since last time, try hardware
* rendering again:
*/
if (failover->dirty) {
failover->mode = FO_HW;
}
/* Try hardware:
*/
if (failover->mode == FO_HW) {
failover->hw->draw_elements( failover->hw,
indexBuffer,
indexSize,
prim,
start,
count );
}
/* Possibly try software:
*/
if (failover->mode == FO_SW) {
if (failover->dirty) {
failover->hw->flush( failover->hw, ~0, NULL );
failover_state_emit( failover );
}
failover->sw->draw_elements( failover->sw,
indexBuffer,
indexSize,
prim,
start,
count );
/* Be ready to switch back to hardware rendering without an
* intervening flush. Unlikely to be much performance impact to
* this:
*/
failover->sw->flush( failover->sw, ~0, NULL );
}
}
static void failover_draw_arrays( struct pipe_context *pipe,
unsigned prim, unsigned start, unsigned count)
{
failover_draw_elements(pipe, NULL, 0, prim, start, count);
}
static unsigned int
failover_is_texture_referenced( struct pipe_context *_pipe,
struct pipe_texture *texture,
unsigned face, unsigned level)
{
struct failover_context *failover = failover_context( _pipe );
struct pipe_context *pipe = (failover->mode == FO_HW) ?
failover->hw : failover->sw;
return pipe->is_texture_referenced(pipe, texture, face, level);
}
static unsigned int
failover_is_buffer_referenced( struct pipe_context *_pipe,
struct pipe_buffer *buf)
{
struct failover_context *failover = failover_context( _pipe );
struct pipe_context *pipe = (failover->mode == FO_HW) ?
failover->hw : failover->sw;
return pipe->is_buffer_referenced(pipe, buf);
}
struct pipe_context *failover_create( struct pipe_context *hw,
struct pipe_context *sw )
{
struct failover_context *failover = CALLOC_STRUCT(failover_context);
if (failover == NULL)
return NULL;
failover->hw = hw;
failover->sw = sw;
failover->pipe.winsys = hw->winsys;
failover->pipe.screen = hw->screen;
failover->pipe.destroy = failover_destroy;
#if 0
failover->pipe.is_format_supported = hw->is_format_supported;
failover->pipe.get_name = hw->get_name;
failover->pipe.get_vendor = hw->get_vendor;
failover->pipe.get_param = hw->get_param;
failover->pipe.get_paramf = hw->get_paramf;
#endif
failover->pipe.draw_arrays = failover_draw_arrays;
failover->pipe.draw_elements = failover_draw_elements;
failover->pipe.clear = hw->clear;
/* No software occlusion fallback (or other optional functionality)
* at this point - if the hardware doesn't support it, don't
* advertise it to the application.
*/
failover->pipe.begin_query = hw->begin_query;
failover->pipe.end_query = hw->end_query;
failover_init_state_functions( failover );
failover->pipe.surface_copy = hw->surface_copy;
failover->pipe.surface_fill = hw->surface_fill;
#if 0
failover->pipe.texture_create = hw->texture_create;
failover->pipe.texture_destroy = hw->texture_destroy;
failover->pipe.get_tex_surface = hw->get_tex_surface;
failover->pipe.texture_update = hw->texture_update;
#endif
failover->pipe.flush = hw->flush;
failover->pipe.is_texture_referenced = failover_is_texture_referenced;
failover->pipe.is_buffer_referenced = failover_is_buffer_referenced;
failover->dirty = 0;
return &failover->pipe;
}
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