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/*
* Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
* Copyright © 2018 Google, Inc.
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Rob Clark <robclark@freedesktop.org>
*/
#include "pipe/p_state.h"
#include "util/u_blend.h"
#include "util/u_string.h"
#include "util/u_memory.h"
#include "fd6_blend.h"
#include "fd6_context.h"
#include "fd6_format.h"
#include "fd6_pack.h"
// XXX move somewhere common.. same across a3xx/a4xx/a5xx..
static enum a3xx_rb_blend_opcode
blend_func(unsigned func)
{
switch (func) {
case PIPE_BLEND_ADD:
return BLEND_DST_PLUS_SRC;
case PIPE_BLEND_MIN:
return BLEND_MIN_DST_SRC;
case PIPE_BLEND_MAX:
return BLEND_MAX_DST_SRC;
case PIPE_BLEND_SUBTRACT:
return BLEND_SRC_MINUS_DST;
case PIPE_BLEND_REVERSE_SUBTRACT:
return BLEND_DST_MINUS_SRC;
default:
DBG("invalid blend func: %x", func);
return 0;
}
}
void *
fd6_blend_state_create(struct pipe_context *pctx,
const struct pipe_blend_state *cso)
{
struct fd_context *ctx = fd_context(pctx);
struct fd6_blend_stateobj *so;
enum a3xx_rop_code rop = ROP_COPY;
bool reads_dest = false;
unsigned i, mrt_blend = 0;
if (cso->logicop_enable) {
rop = cso->logicop_func; /* maps 1:1 */
switch (cso->logicop_func) {
case PIPE_LOGICOP_NOR:
case PIPE_LOGICOP_AND_INVERTED:
case PIPE_LOGICOP_AND_REVERSE:
case PIPE_LOGICOP_INVERT:
case PIPE_LOGICOP_XOR:
case PIPE_LOGICOP_NAND:
case PIPE_LOGICOP_AND:
case PIPE_LOGICOP_EQUIV:
case PIPE_LOGICOP_NOOP:
case PIPE_LOGICOP_OR_INVERTED:
case PIPE_LOGICOP_OR_REVERSE:
case PIPE_LOGICOP_OR:
reads_dest = true;
break;
}
}
so = CALLOC_STRUCT(fd6_blend_stateobj);
if (!so)
return NULL;
so->base = *cso;
struct fd_ringbuffer *ring = fd_ringbuffer_new_object(ctx->pipe,
((A6XX_MAX_RENDER_TARGETS * 4) + 4) * 4);
so->stateobj = ring;
so->lrz_write = true; /* unless blend enabled for any MRT */
for (i = 0; i < A6XX_MAX_RENDER_TARGETS; i++) {
const struct pipe_rt_blend_state *rt;
if (cso->independent_blend_enable)
rt = &cso->rt[i];
else
rt = &cso->rt[0];
OUT_REG(ring, A6XX_RB_MRT_BLEND_CONTROL(i,
.rgb_src_factor = fd_blend_factor(rt->rgb_src_factor),
.rgb_blend_opcode = blend_func(rt->rgb_func),
.rgb_dest_factor = fd_blend_factor(rt->rgb_dst_factor),
.alpha_src_factor = fd_blend_factor(rt->alpha_src_factor),
.alpha_blend_opcode = blend_func(rt->alpha_func),
.alpha_dest_factor = fd_blend_factor(rt->alpha_dst_factor),
));
OUT_REG(ring, A6XX_RB_MRT_CONTROL(i,
.rop_code = rop,
.rop_enable = cso->logicop_enable,
.component_enable = rt->colormask,
.blend = rt->blend_enable,
.blend2 = rt->blend_enable,
));
if (rt->blend_enable) {
mrt_blend |= (1 << i);
so->lrz_write = false;
}
if (reads_dest) {
mrt_blend |= (1 << i);
so->lrz_write = false;
}
}
OUT_REG(ring, A6XX_RB_DITHER_CNTL(
.dither_mode_mrt0 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt1 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt2 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt3 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt4 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt5 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt6 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
.dither_mode_mrt7 = cso->dither ? DITHER_ALWAYS : DITHER_DISABLE,
));
so->rb_blend_cntl = A6XX_RB_BLEND_CNTL_ENABLE_BLEND(mrt_blend) |
COND(cso->alpha_to_coverage, A6XX_RB_BLEND_CNTL_ALPHA_TO_COVERAGE) |
COND(cso->independent_blend_enable, A6XX_RB_BLEND_CNTL_INDEPENDENT_BLEND);
OUT_REG(ring, A6XX_SP_BLEND_CNTL(
.unk8 = true,
.alpha_to_coverage = cso->alpha_to_coverage,
.enabled = !!mrt_blend,
));
return so;
}
void
fd6_blend_state_delete(struct pipe_context *pctx, void *hwcso)
{
struct fd6_blend_stateobj *so = hwcso;
fd_ringbuffer_del(so->stateobj);
FREE(hwcso);
}
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