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/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 1999-2005 Brian Paul 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL 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 "pipe/p_util.h"
#include "pipe/p_defines.h"
#include "sp_context.h"
#include "sp_headers.h"
#include "sp_quad.h"
#include "sp_tex_sample.h"
struct quad_shade_stage
{
struct quad_stage stage;
struct tgsi_sampler samplers[PIPE_MAX_SAMPLERS];
};
/** cast wrapper */
static INLINE struct quad_shade_stage *
quad_shade_stage(struct quad_stage *qs)
{
return (struct quad_shade_stage *) qs;
}
/**
* Compute quad's attribute values by linear interpolation.
*
* Push into the fp:
*
* INPUT[attr] = MAD COEF_A0[attr], COEF_DADX[attr], INPUT_WPOS.xxxx
* INPUT[attr] = MAD INPUT[attr], COEF_DADY[attr], INPUT_WPOS.yyyy
*/
static INLINE void
linterp(const struct tgsi_interp_coef *coef,
struct tgsi_exec_vector *pos, uint ch)
{
uint j;
for (j = 0; j < QUAD_SIZE; j++) {
const float x = pos->xyzw[0].f[j];
const float y = pos->xyzw[1].f[j];
pos->xyzw[ch].f[j] = (coef->a0[ch] +
coef->dadx[ch] * x +
coef->dady[ch] * y);
}
}
/* This should be done by the fragment shader execution unit (code
* generated from the decl instructions). Do it here for now.
*/
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;
const float fx = (float) quad->x0;
const float fy = (float) quad->y0;
struct tgsi_exec_machine machine;
ALIGN16_DECL(struct tgsi_exec_vector, inputs, PIPE_ATTRIB_MAX);
ALIGN16_DECL(struct tgsi_exec_vector, outputs, PIPE_ATTRIB_MAX);
#ifdef DEBUG
memset( &machine, 0, sizeof( machine ) );
#endif
/* init machine state */
tgsi_exec_machine_init(
&machine,
softpipe->fs->tokens,
PIPE_MAX_SAMPLERS,
qss->samplers );
/* Consts does not require 16 byte alignment. */
machine.Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
machine.Inputs = ALIGN16_ASSIGN(inputs);
machine.Outputs = ALIGN16_ASSIGN(outputs);
machine.InterpCoefs = quad->coef;
machine.Inputs[0].xyzw[0].f[0] = fx;
machine.Inputs[0].xyzw[0].f[1] = fx + 1.0f;
machine.Inputs[0].xyzw[0].f[2] = fx;
machine.Inputs[0].xyzw[0].f[3] = fx + 1.0f;
machine.Inputs[0].xyzw[1].f[0] = fy;
machine.Inputs[0].xyzw[1].f[1] = fy;
machine.Inputs[0].xyzw[1].f[2] = fy + 1.0f;
machine.Inputs[0].xyzw[1].f[3] = fy + 1.0f;
/* interp Z */
linterp(&quad->coef[0], &machine.Inputs[0], 2); /* Z */
linterp(&quad->coef[0], &machine.Inputs[0], 3); /* 1/W */
/* run shader */
tgsi_exec_machine_run( &machine );
/* store result color (always in output[1]) */
memcpy(
quad->outputs.color,
&machine.Outputs[1].xyzw[0].f[0],
sizeof( quad->outputs.color ) );
#if 0
if( softpipe->need_z ) {
/* XXX temporary */
memcpy(
quad->outputs.depth,
&machine.Outputs[0].xyzw[2],
sizeof( quad->outputs.depth ) );
}
#else
{
uint i;
for (i = 0; i < 4; i++) {
quad->outputs.depth[i] = machine.Inputs[0].xyzw[2].f[i];
#if 0
printf("output z %f\n", quad->outputs.depth[i]);
#endif
}
}
#endif
/* shader may cull fragments */
if( quad->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;
unsigned i, entry;
for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
qss->samplers[i].state = softpipe->sampler[i];
qss->samplers[i].texture = softpipe->texture[i];
qss->samplers[i].get_samples = sp_get_samples;
qss->samplers[i].pipe = &softpipe->pipe;
/* init cache info here */
for (entry = 0; entry < TEX_CACHE_NUM_ENTRIES; entry++) {
qss->samplers[i].cache[entry].x = -1;
qss->samplers[i].cache[entry].y = -1;
qss->samplers[i].cache[entry].level = -1;
qss->samplers[i].cache[entry].face = -1;
qss->samplers[i].cache[entry].zslice = -1;
}
}
if (qs->next)
qs->next->begin(qs->next);
}
struct quad_stage *sp_quad_shade_stage( struct softpipe_context *softpipe )
{
struct quad_shade_stage *stage = CALLOC_STRUCT(quad_shade_stage);
stage->stage.softpipe = softpipe;
stage->stage.begin = shade_begin;
stage->stage.run = shade_quad;
return &stage->stage;
}
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