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/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
/*
* Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
*
* 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_string.h"
#include "util/u_memory.h"
#include "fd3_blend.h"
#include "fd3_context.h"
#include "fd3_util.h"
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 *
fd3_blend_state_create(struct pipe_context *pctx,
const struct pipe_blend_state *cso)
{
struct fd3_blend_stateobj *so;
enum a3xx_rop_code rop = ROP_COPY;
bool reads_dest = false;
int i;
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;
}
}
if (cso->independent_blend_enable) {
DBG("Unsupported! independent blend state");
return NULL;
}
so = CALLOC_STRUCT(fd3_blend_stateobj);
if (!so)
return NULL;
so->base = *cso;
for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
const struct pipe_rt_blend_state *rt = &cso->rt[i];
so->rb_mrt[i].blend_control =
A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor)) |
A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
A3XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor)) |
A3XX_RB_MRT_BLEND_CONTROL_CLAMP_ENABLE;
so->rb_mrt[i].control =
A3XX_RB_MRT_CONTROL_ROP_CODE(rop) |
A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
if (rt->blend_enable)
so->rb_mrt[i].control |=
A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
A3XX_RB_MRT_CONTROL_BLEND |
A3XX_RB_MRT_CONTROL_BLEND2;
if (reads_dest)
so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
if (cso->dither)
so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
}
return so;
}
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