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/**************************************************************************
*
* Copyright 2008-2009 VMware, Inc.
* Copyright 2007 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.
*
**************************************************************************/
/* 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 "lp_context.h"
#include "lp_state.h"
#include "lp_quad.h"
#include "lp_quad_pipe.h"
#include "lp_texture.h"
#include "lp_tex_sample.h"
struct quad_shade_stage
{
struct quad_stage stage; /**< base class */
union tgsi_exec_channel ALIGN16_ATTRIB pos[NUM_CHANNELS];
uint32_t ALIGN16_ATTRIB mask[NUM_CHANNELS];
};
/** 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 boolean
shade_quad(struct quad_stage *qs, struct quad_header *quad)
{
struct quad_shade_stage *qss = quad_shade_stage( qs );
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
void *constants;
struct tgsi_sampler **samplers;
unsigned chan_index;
constants = llvmpipe->mapped_constants[PIPE_SHADER_FRAGMENT];
samplers = (struct tgsi_sampler **)llvmpipe->tgsi.frag_samplers_list;
for (chan_index = 0; chan_index < NUM_CHANNELS; ++chan_index)
qss->mask[chan_index] = ~0;
/* run shader */
llvmpipe->fs->jit_function( quad->input.x0,
quad->input.y0,
quad->coef->a0,
quad->coef->dadx,
quad->coef->dady,
constants,
qss->mask,
quad->output.color,
quad->output.depth,
samplers);
for (chan_index = 0; chan_index < NUM_CHANNELS; ++chan_index)
if(!qss->mask[chan_index])
quad->inout.mask &= ~(1 << chan_index);
if (quad->inout.mask == 0)
return FALSE;
return TRUE;
}
static void
coverage_quad(struct quad_stage *qs, struct quad_header *quad)
{
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
uint cbuf;
/* loop over colorbuffer outputs */
for (cbuf = 0; cbuf < llvmpipe->framebuffer.nr_cbufs; cbuf++) {
float (*quadColor)[4] = quad->output.color[cbuf];
unsigned j;
for (j = 0; j < QUAD_SIZE; j++) {
assert(quad->input.coverage[j] >= 0.0);
assert(quad->input.coverage[j] <= 1.0);
quadColor[3][j] *= quad->input.coverage[j];
}
}
}
static void
shade_quads(struct quad_stage *qs,
struct quad_header *quads[],
unsigned nr)
{
unsigned i, pass = 0;
for (i = 0; i < nr; i++) {
if(!quads[i]->inout.mask)
continue;
if (!shade_quad(qs, quads[i]))
continue;
if (/*do_coverage*/ 0)
coverage_quad( qs, quads[i] );
++pass;
}
if (pass)
qs->next->run(qs->next, quads, nr);
}
/**
* Per-primitive (or per-begin?) setup
*/
static void
shade_begin(struct quad_stage *qs)
{
qs->next->begin(qs->next);
}
static void
shade_destroy(struct quad_stage *qs)
{
align_free( qs );
}
struct quad_stage *
lp_quad_shade_stage( struct llvmpipe_context *llvmpipe )
{
struct quad_shade_stage *qss;
qss = align_malloc(sizeof(struct quad_shade_stage), 16);
if (!qss)
return NULL;
memset(qss, 0, sizeof *qss);
qss->stage.llvmpipe = llvmpipe;
qss->stage.begin = shade_begin;
qss->stage.run = shade_quads;
qss->stage.destroy = shade_destroy;
return &qss->stage;
}
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