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/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
/*
* Copyright (C) 2012-2013 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_blend.h"
#include "util/u_string.h"
#include "util/u_memory.h"
#include "fd2_blend.h"
#include "fd2_context.h"
#include "fd2_util.h"
static enum a2xx_rb_blend_opcode
blend_func(unsigned func)
{
switch (func) {
case PIPE_BLEND_ADD:
return BLEND2_DST_PLUS_SRC;
case PIPE_BLEND_MIN:
return BLEND2_MIN_DST_SRC;
case PIPE_BLEND_MAX:
return BLEND2_MAX_DST_SRC;
case PIPE_BLEND_SUBTRACT:
return BLEND2_SRC_MINUS_DST;
case PIPE_BLEND_REVERSE_SUBTRACT:
return BLEND2_DST_MINUS_SRC;
default:
DBG("invalid blend func: %x", func);
return 0;
}
}
void *
fd2_blend_state_create(struct pipe_context *pctx,
const struct pipe_blend_state *cso)
{
const struct pipe_rt_blend_state *rt = &cso->rt[0];
struct fd2_blend_stateobj *so;
unsigned rop = PIPE_LOGICOP_COPY;
if (cso->logicop_enable)
rop = cso->logicop_func; /* 1:1 mapping with hw */
if (cso->independent_blend_enable) {
DBG("Unsupported! independent blend state");
return NULL;
}
so = CALLOC_STRUCT(fd2_blend_stateobj);
if (!so)
return NULL;
so->base = *cso;
so->rb_colorcontrol = A2XX_RB_COLORCONTROL_ROP_CODE(rop);
so->rb_blendcontrol_rgb =
A2XX_RB_BLEND_CONTROL_COLOR_SRCBLEND(fd_blend_factor(rt->rgb_src_factor)) |
A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(blend_func(rt->rgb_func)) |
A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(fd_blend_factor(rt->rgb_dst_factor));
so->rb_blendcontrol_alpha =
A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(fd_blend_factor(rt->alpha_src_factor)) |
A2XX_RB_BLEND_CONTROL_ALPHA_COMB_FCN(blend_func(rt->alpha_func)) |
A2XX_RB_BLEND_CONTROL_ALPHA_DESTBLEND(fd_blend_factor(rt->alpha_dst_factor));
so->rb_blendcontrol_no_alpha_rgb =
A2XX_RB_BLEND_CONTROL_COLOR_SRCBLEND(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(blend_func(rt->rgb_func)) |
A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
if (rt->colormask & PIPE_MASK_R)
so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_RED;
if (rt->colormask & PIPE_MASK_G)
so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_GREEN;
if (rt->colormask & PIPE_MASK_B)
so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_BLUE;
if (rt->colormask & PIPE_MASK_A)
so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_ALPHA;
if (!rt->blend_enable)
so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_BLEND_DISABLE;
if (cso->dither)
so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_DITHER_MODE(DITHER_ALWAYS);
return so;
}
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