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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 "main/glheader.h"
#include "main/context.h"
#include "pipe/p_defines.h"
#include "st_context.h"
#include "st_atom.h"
#include "st_cb_bitmap.h"
#include "st_program.h"
#include "st_manager.h"
/**
* This is used to initialize st->atoms[].
*/
static const struct st_tracked_state *atoms[] =
{
&st_update_depth_stencil_alpha,
&st_update_clip,
&st_finalize_textures,
&st_update_fp,
&st_update_vp,
&st_update_rasterizer,
&st_update_polygon_stipple,
&st_update_viewport,
&st_update_scissor,
&st_update_blend,
&st_update_sampler,
&st_update_texture,
&st_update_framebuffer,
&st_update_msaa,
&st_update_vs_constants,
&st_update_fs_constants,
&st_update_pixel_transfer
};
void st_init_atoms( struct st_context *st )
{
/* no-op */
}
void st_destroy_atoms( struct st_context *st )
{
/* no-op */
}
/***********************************************************************
*/
static GLboolean check_state( const struct st_state_flags *a,
const struct st_state_flags *b )
{
return ((a->mesa & b->mesa) ||
(a->st & b->st));
}
static void accumulate_state( struct st_state_flags *a,
const struct st_state_flags *b )
{
a->mesa |= b->mesa;
a->st |= b->st;
}
static void xor_states( struct st_state_flags *result,
const struct st_state_flags *a,
const struct st_state_flags *b )
{
result->mesa = a->mesa ^ b->mesa;
result->st = a->st ^ b->st;
}
/* Too complex to figure out, just check every time:
*/
static void check_program_state( struct st_context *st )
{
GLcontext *ctx = st->ctx;
if (ctx->VertexProgram._Current != &st->vp->Base)
st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
if (ctx->FragmentProgram._Current != &st->fp->Base)
st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
}
/***********************************************************************
* Update all derived state:
*/
void st_validate_state( struct st_context *st )
{
struct st_state_flags *state = &st->dirty;
GLuint i;
/* The bitmap cache is immune to pixel unpack changes.
* Note that GLUT makes several calls to glPixelStore for each
* bitmap char it draws so this is an important check.
*/
if (state->mesa & ~_NEW_PACKUNPACK)
st_flush_bitmap_cache(st);
check_program_state( st );
st_manager_validate_framebuffers(st);
if (state->st == 0)
return;
/*printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);*/
if (1) {
/* Debug version which enforces various sanity checks on the
* state flags which are generated and checked to help ensure
* state atoms are ordered correctly in the list.
*/
struct st_state_flags examined, prev;
memset(&examined, 0, sizeof(examined));
prev = *state;
for (i = 0; i < Elements(atoms); i++) {
const struct st_tracked_state *atom = atoms[i];
struct st_state_flags generated;
/*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
if (!(atom->dirty.mesa || atom->dirty.st) ||
!atom->update) {
printf("malformed atom %s\n", atom->name);
assert(0);
}
if (check_state(state, &atom->dirty)) {
atoms[i]->update( st );
/*printf("after: %x\n", atom->dirty.mesa);*/
}
accumulate_state(&examined, &atom->dirty);
/* generated = (prev ^ state)
* if (examined & generated)
* fail;
*/
xor_states(&generated, &prev, state);
assert(!check_state(&examined, &generated));
prev = *state;
}
/*printf("\n");*/
}
else {
for (i = 0; i < Elements(atoms); i++) {
if (check_state(state, &atoms[i]->dirty))
atoms[i]->update( st );
}
}
memset(state, 0, sizeof(*state));
}
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