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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
* Copyright 2008 VMware, Inc. 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.
*
**************************************************************************/
/* Vertices are just an array of floats, with all the attributes
* packed. We currently assume a layout like:
*
* attr[0][0..3] - window position
* attr[1..n][0..3] - remaining attributes.
*
* Attributes are assumed to be 4 floats wide but are packed so that
* all the enabled attributes run contiguously.
*/
#include "util/u_math.h"
#include "util/u_memory.h"
#include "pipe/p_defines.h"
#include "pipe/p_shader_tokens.h"
#include "sp_context.h"
#include "sp_state.h"
#include "sp_quad.h"
#include "sp_quad_pipe.h"
#include "sp_texture.h"
#include "sp_tex_sample.h"
struct quad_shade_stage
{
struct quad_stage stage; /**< base class */
struct tgsi_exec_machine *machine;
struct tgsi_exec_vector *inputs, *outputs;
};
/** cast wrapper */
static INLINE struct quad_shade_stage *
quad_shade_stage(struct quad_stage *qs)
{
return (struct quad_shade_stage *) qs;
}
/**
* Execute fragment shader for the four fragments in the quad.
*/
static void
shade_quad(struct quad_stage *qs, struct quad_header *quad)
{
struct quad_shade_stage *qss = quad_shade_stage( qs );
struct softpipe_context *softpipe = qs->softpipe;
struct tgsi_exec_machine *machine = qss->machine;
boolean z_written;
/* Consts do not require 16 byte alignment. */
machine->Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
machine->InterpCoefs = quad->coef;
/* run shader */
quad->inout.mask &= softpipe->fs->run( softpipe->fs, machine, quad );
/* store outputs */
z_written = FALSE;
{
const ubyte *sem_name = softpipe->fs->info.output_semantic_name;
const ubyte *sem_index = softpipe->fs->info.output_semantic_index;
const uint n = qss->stage.softpipe->fs->info.num_outputs;
uint i;
for (i = 0; i < n; i++) {
switch (sem_name[i]) {
case TGSI_SEMANTIC_COLOR:
{
uint cbuf = sem_index[i];
memcpy(quad->output.color[cbuf],
&machine->Outputs[i].xyzw[0].f[0],
sizeof(quad->output.color[0]) );
}
break;
case TGSI_SEMANTIC_POSITION:
{
uint j;
for (j = 0; j < 4; j++) {
quad->output.depth[j] = machine->Outputs[0].xyzw[2].f[j];
}
z_written = TRUE;
}
break;
}
}
}
if (!z_written) {
/* compute Z values now, as in the quad earlyz stage */
/* XXX we should really only do this if the earlyz stage is not used */
const float fx = (float) quad->input.x0;
const float fy = (float) quad->input.y0;
const float dzdx = quad->posCoef->dadx[2];
const float dzdy = quad->posCoef->dady[2];
const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy;
quad->output.depth[0] = z0;
quad->output.depth[1] = z0 + dzdx;
quad->output.depth[2] = z0 + dzdy;
quad->output.depth[3] = z0 + dzdx + dzdy;
}
/* shader may cull fragments */
if (quad->inout.mask) {
qs->next->run( qs->next, quad );
}
}
/**
* Per-primitive (or per-begin?) setup
*/
static void
shade_begin(struct quad_stage *qs)
{
struct quad_shade_stage *qss = quad_shade_stage(qs);
struct softpipe_context *softpipe = qs->softpipe;
softpipe->fs->prepare( softpipe->fs,
qss->machine,
(struct tgsi_sampler **)
softpipe->tgsi.frag_samplers_list );
qs->next->begin(qs->next);
}
static void
shade_destroy(struct quad_stage *qs)
{
struct quad_shade_stage *qss = (struct quad_shade_stage *) qs;
tgsi_exec_machine_destroy(qss->machine);
FREE( qs );
}
struct quad_stage *
sp_quad_shade_stage( struct softpipe_context *softpipe )
{
struct quad_shade_stage *qss = CALLOC_STRUCT(quad_shade_stage);
if (!qss)
goto fail;
qss->stage.softpipe = softpipe;
qss->stage.begin = shade_begin;
qss->stage.run = shade_quad;
qss->stage.destroy = shade_destroy;
qss->machine = tgsi_exec_machine_create();
if (!qss->machine)
goto fail;
return &qss->stage;
fail:
if (qss && qss->machine)
tgsi_exec_machine_destroy(qss->machine);
FREE(qss);
return NULL;
}
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