110 lines
4.2 KiB
C
110 lines
4.2 KiB
C
/*
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* Copyright (c) 2012-2015 Etnaviv Project
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Wladimir J. van der Laan <laanwj@gmail.com>
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*/
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#include "etnaviv_blend.h"
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#include "etnaviv_context.h"
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#include "etnaviv_translate.h"
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#include "pipe/p_defines.h"
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#include "util/u_memory.h"
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void *
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etna_blend_state_create(struct pipe_context *pctx,
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const struct pipe_blend_state *so)
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{
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const struct pipe_rt_blend_state *rt0 = &so->rt[0];
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struct etna_blend_state *co = CALLOC_STRUCT(etna_blend_state);
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if (!co)
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return NULL;
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co->base = *so;
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/* Enable blending if
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* - blend enabled in blend state
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* - NOT source factor is ONE and destination factor ZERO for both rgb and
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* alpha (which would mean that blending is effectively disabled)
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*/
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bool enable = rt0->blend_enable &&
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!(rt0->rgb_src_factor == PIPE_BLENDFACTOR_ONE &&
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rt0->rgb_dst_factor == PIPE_BLENDFACTOR_ZERO &&
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rt0->alpha_src_factor == PIPE_BLENDFACTOR_ONE &&
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rt0->alpha_dst_factor == PIPE_BLENDFACTOR_ZERO);
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/* Enable separate alpha if
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* - Blending enabled (see above)
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* - NOT source factor is equal to destination factor for both rgb abd
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* alpha (which would effectively that mean alpha is not separate)
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*/
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bool separate_alpha = enable &&
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!(rt0->rgb_src_factor == rt0->alpha_src_factor &&
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rt0->rgb_dst_factor == rt0->alpha_dst_factor);
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/* If the complete render target is written, set full_overwrite:
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* - The color mask is 1111
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* - No blending is used
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*/
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bool full_overwrite = (rt0->colormask == 15) && !enable;
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if (enable) {
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co->PE_ALPHA_CONFIG =
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VIVS_PE_ALPHA_CONFIG_BLEND_ENABLE_COLOR |
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COND(separate_alpha, VIVS_PE_ALPHA_CONFIG_BLEND_SEPARATE_ALPHA) |
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VIVS_PE_ALPHA_CONFIG_SRC_FUNC_COLOR(translate_blend_factor(rt0->rgb_src_factor)) |
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VIVS_PE_ALPHA_CONFIG_SRC_FUNC_ALPHA(translate_blend_factor(rt0->alpha_src_factor)) |
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VIVS_PE_ALPHA_CONFIG_DST_FUNC_COLOR(translate_blend_factor(rt0->rgb_dst_factor)) |
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VIVS_PE_ALPHA_CONFIG_DST_FUNC_ALPHA(translate_blend_factor(rt0->alpha_dst_factor)) |
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VIVS_PE_ALPHA_CONFIG_EQ_COLOR(translate_blend(rt0->rgb_func)) |
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VIVS_PE_ALPHA_CONFIG_EQ_ALPHA(translate_blend(rt0->alpha_func));
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} else {
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co->PE_ALPHA_CONFIG = 0;
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}
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co->PE_COLOR_FORMAT =
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VIVS_PE_COLOR_FORMAT_COMPONENTS(rt0->colormask) |
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COND(full_overwrite, VIVS_PE_COLOR_FORMAT_OVERWRITE);
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co->PE_LOGIC_OP =
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VIVS_PE_LOGIC_OP_OP(so->logicop_enable ? so->logicop_func : LOGIC_OP_COPY) |
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0x000E4000 /* ??? */;
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/* independent_blend_enable not needed: only one rt supported */
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/* XXX alpha_to_coverage / alpha_to_one? */
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/* Set dither registers based on dither status. These registers set the
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* dither pattern,
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* for now, set the same values as the blob.
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*/
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if (so->dither) {
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co->PE_DITHER[0] = 0x6e4ca280;
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co->PE_DITHER[1] = 0x5d7f91b3;
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} else {
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co->PE_DITHER[0] = 0xffffffff;
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co->PE_DITHER[1] = 0xffffffff;
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}
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return co;
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}
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