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/*
* Copyright (c) 2012-2015 Etnaviv Project
*
* 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
* 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:
* Wladimir J. van der Laan <laanwj@gmail.com>
*/
#include "etnaviv_blend.h"
#include "etnaviv_context.h"
#include "etnaviv_translate.h"
#include "pipe/p_defines.h"
#include "util/u_memory.h"
void *
etna_blend_state_create(struct pipe_context *pctx,
const struct pipe_blend_state *so)
{
const struct pipe_rt_blend_state *rt0 = &so->rt[0];
struct etna_blend_state *co = CALLOC_STRUCT(etna_blend_state);
if (!co)
return NULL;
co->base = *so;
/* Enable blending if
* - blend enabled in blend state
* - NOT source factor is ONE and destination factor ZERO for both rgb and
* alpha (which would mean that blending is effectively disabled)
*/
bool enable = rt0->blend_enable &&
!(rt0->rgb_src_factor == PIPE_BLENDFACTOR_ONE &&
rt0->rgb_dst_factor == PIPE_BLENDFACTOR_ZERO &&
rt0->alpha_src_factor == PIPE_BLENDFACTOR_ONE &&
rt0->alpha_dst_factor == PIPE_BLENDFACTOR_ZERO);
/* Enable separate alpha if
* - Blending enabled (see above)
* - NOT source factor is equal to destination factor for both rgb abd
* alpha (which would effectively that mean alpha is not separate)
*/
bool separate_alpha = enable &&
!(rt0->rgb_src_factor == rt0->alpha_src_factor &&
rt0->rgb_dst_factor == rt0->alpha_dst_factor);
/* If the complete render target is written, set full_overwrite:
* - The color mask is 1111
* - No blending is used
*/
bool full_overwrite = (rt0->colormask == 15) && !enable;
if (enable) {
co->PE_ALPHA_CONFIG =
VIVS_PE_ALPHA_CONFIG_BLEND_ENABLE_COLOR |
COND(separate_alpha, VIVS_PE_ALPHA_CONFIG_BLEND_SEPARATE_ALPHA) |
VIVS_PE_ALPHA_CONFIG_SRC_FUNC_COLOR(translate_blend_factor(rt0->rgb_src_factor)) |
VIVS_PE_ALPHA_CONFIG_SRC_FUNC_ALPHA(translate_blend_factor(rt0->alpha_src_factor)) |
VIVS_PE_ALPHA_CONFIG_DST_FUNC_COLOR(translate_blend_factor(rt0->rgb_dst_factor)) |
VIVS_PE_ALPHA_CONFIG_DST_FUNC_ALPHA(translate_blend_factor(rt0->alpha_dst_factor)) |
VIVS_PE_ALPHA_CONFIG_EQ_COLOR(translate_blend(rt0->rgb_func)) |
VIVS_PE_ALPHA_CONFIG_EQ_ALPHA(translate_blend(rt0->alpha_func));
} else {
co->PE_ALPHA_CONFIG = 0;
}
co->PE_COLOR_FORMAT =
VIVS_PE_COLOR_FORMAT_COMPONENTS(rt0->colormask) |
COND(full_overwrite, VIVS_PE_COLOR_FORMAT_OVERWRITE);
co->PE_LOGIC_OP =
VIVS_PE_LOGIC_OP_OP(so->logicop_enable ? so->logicop_func : LOGIC_OP_COPY) |
0x000E4000 /* ??? */;
/* independent_blend_enable not needed: only one rt supported */
/* XXX alpha_to_coverage / alpha_to_one? */
/* Set dither registers based on dither status. These registers set the
* dither pattern,
* for now, set the same values as the blob.
*/
if (so->dither) {
co->PE_DITHER[0] = 0x6e4ca280;
co->PE_DITHER[1] = 0x5d7f91b3;
} else {
co->PE_DITHER[0] = 0xffffffff;
co->PE_DITHER[1] = 0xffffffff;
}
return co;
}
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