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/**************************************************************************
*
* Copyright 2008 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.
*
**************************************************************************/
/**
* \author Brian Paul
*/
#include <transpose_matrix4x4.h>
#include "pipe/p_format.h"
#include "spu_main.h"
#include "spu_colorpack.h"
#include "spu_per_fragment_op.h"
/**
* Called by rasterizer for each quad after the shader has run. This
* is a fallback/debug function. In reality we'll use a generated
* function produced by the PPU. But this function is useful for
* debug/validation.
*/
void
spu_fallback_fragment_ops(uint x, uint y,
tile_t *colorTile,
tile_t *depthStencilTile,
vector float fragZ,
vector float fragRed,
vector float fragGreen,
vector float fragBlue,
vector float fragAlpha,
vector unsigned int mask)
{
vector float frag_soa[4], frag_aos[4];
unsigned int c0, c1, c2, c3;
/* do alpha test */
if (spu.depth_stencil_alpha.alpha.enabled) {
vector float ref = spu_splats(spu.depth_stencil_alpha.alpha.ref);
vector unsigned int amask;
switch (spu.depth_stencil_alpha.alpha.func) {
case PIPE_FUNC_LESS:
amask = spu_cmpgt(ref, fragAlpha); /* mask = (fragAlpha < ref) */
break;
case PIPE_FUNC_GREATER:
amask = spu_cmpgt(fragAlpha, ref); /* mask = (fragAlpha > ref) */
break;
case PIPE_FUNC_GEQUAL:
amask = spu_cmpgt(ref, fragAlpha);
amask = spu_nor(amask, amask);
break;
case PIPE_FUNC_LEQUAL:
amask = spu_cmpgt(fragAlpha, ref);
amask = spu_nor(amask, amask);
break;
case PIPE_FUNC_EQUAL:
amask = spu_cmpeq(ref, fragAlpha);
break;
case PIPE_FUNC_NOTEQUAL:
amask = spu_cmpeq(ref, fragAlpha);
amask = spu_nor(amask, amask);
break;
case PIPE_FUNC_ALWAYS:
amask = spu_splats(0xffffffffU);
break;
case PIPE_FUNC_NEVER:
amask = spu_splats( 0x0U);
break;
default:
;
}
mask = spu_and(mask, amask);
}
/* Z and/or stencil testing... */
if (spu.depth_stencil_alpha.depth.enabled ||
spu.depth_stencil_alpha.stencil[0].enabled) {
/* get four Z/Stencil values from tile */
vector unsigned int mask24 = spu_splats((unsigned int)0x00ffffffU);
vector unsigned int ifbZS = depthStencilTile->ui4[y/2][x/2];
vector unsigned int ifbZ = spu_and(ifbZS, mask24);
vector unsigned int ifbS = spu_andc(ifbZS, mask24);
if (spu.depth_stencil_alpha.stencil[0].enabled) {
/* do stencil test */
ASSERT(spu.fb.depth_format == PIPE_FORMAT_S8Z24_UNORM);
}
else if (spu.depth_stencil_alpha.depth.enabled) {
/* do depth test */
ASSERT(spu.fb.depth_format == PIPE_FORMAT_S8Z24_UNORM ||
spu.fb.depth_format == PIPE_FORMAT_X8Z24_UNORM);
vector unsigned int ifragZ;
vector unsigned int zmask;
/* convert four fragZ from float to uint */
fragZ = spu_mul(fragZ, spu_splats((float) 0xffffff));
ifragZ = spu_convtu(fragZ, 0);
/* do depth comparison, setting zmask with results */
switch (spu.depth_stencil_alpha.depth.func) {
case PIPE_FUNC_LESS:
zmask = spu_cmpgt(ifbZ, ifragZ); /* mask = (ifragZ < ifbZ) */
break;
case PIPE_FUNC_GREATER:
zmask = spu_cmpgt(ifragZ, ifbZ); /* mask = (ifbZ > ifragZ) */
break;
case PIPE_FUNC_GEQUAL:
zmask = spu_cmpgt(ifbZ, ifragZ);
zmask = spu_nor(zmask, zmask);
break;
case PIPE_FUNC_LEQUAL:
zmask = spu_cmpgt(ifragZ, ifbZ);
zmask = spu_nor(zmask, zmask);
break;
case PIPE_FUNC_EQUAL:
zmask = spu_cmpeq(ifbZ, ifragZ);
break;
case PIPE_FUNC_NOTEQUAL:
zmask = spu_cmpeq(ifbZ, ifragZ);
zmask = spu_nor(zmask, zmask);
break;
case PIPE_FUNC_ALWAYS:
zmask = spu_splats(0xffffffffU);
break;
case PIPE_FUNC_NEVER:
zmask = spu_splats( 0x0U);
break;
default:
;
}
mask = spu_and(mask, zmask);
/* merge framebuffer Z and fragment Z according to the mask */
ifbZ = spu_or(spu_and(ifragZ, mask),
spu_andc(ifbZ, mask));
}
if (spu_extract(spu_orx(mask), 0)) {
/* put new fragment Z/Stencil values back into Z/Stencil tile */
depthStencilTile->ui4[y/2][x/2] = spu_or(ifbZ, ifbS);
spu.cur_ztile_status = TILE_STATUS_DIRTY;
}
}
/* XXX do blending here */
/* XXX do colormask test here */
if (spu_extract(spu_orx(mask), 0)) {
spu.cur_ctile_status = TILE_STATUS_DIRTY;
}
else {
return;
}
/* convert RRRR,GGGG,BBBB,AAAA to RGBA,RGBA,RGBA,RGBA */
#if 0
{
vector float frag_soa[4];
frag_soa[0] = fragRed;
frag_soa[1] = fragGreen;
frag_soa[2] = fragBlue;
frag_soa[3] = fragAlpha;
_transpose_matrix4x4(frag_aos, frag_soa);
}
#else
/* short-cut relying on function parameter layout: */
_transpose_matrix4x4(frag_aos, &fragRed);
(void) fragGreen;
(void) fragBlue;
#endif
switch (spu.fb.color_format) {
case PIPE_FORMAT_A8R8G8B8_UNORM:
c0 = spu_pack_A8R8G8B8(frag_aos[0]);
c1 = spu_pack_A8R8G8B8(frag_aos[1]);
c2 = spu_pack_A8R8G8B8(frag_aos[2]);
c3 = spu_pack_A8R8G8B8(frag_aos[3]);
break;
case PIPE_FORMAT_B8G8R8A8_UNORM:
c0 = spu_pack_B8G8R8A8(frag_aos[0]);
c1 = spu_pack_B8G8R8A8(frag_aos[1]);
c2 = spu_pack_B8G8R8A8(frag_aos[2]);
c3 = spu_pack_B8G8R8A8(frag_aos[3]);
break;
default:
fprintf(stderr, "SPU: Bad pixel format in spu_default_fragment_ops\n");
ASSERT(0);
}
#if 0
/*
* Quad layout:
* +--+--+
* |p0|p1|
* +--+--+
* |p2|p3|
* +--+--+
*/
if (spu_extract(mask, 0))
colorTile->ui[y+0][x+0] = c0;
if (spu_extract(mask, 1))
colorTile->ui[y+0][x+1] = c1;
if (spu_extract(mask, 2))
colorTile->ui[y+1][x+0] = c2;
if (spu_extract(mask, 3))
colorTile->ui[y+1][x+1] = c3;
#else
/*
* Quad layout:
* +--+--+--+--+
* |p0|p1|p2|p3|
* +--+--+--+--+
*/
if (spu_extract(mask, 0))
colorTile->ui[y][x*2] = c0;
if (spu_extract(mask, 1))
colorTile->ui[y][x*2+1] = c1;
if (spu_extract(mask, 2))
colorTile->ui[y][x*2+2] = c2;
if (spu_extract(mask, 3))
colorTile->ui[y][x*2+3] = c3;
#endif
}
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