1/* 2 * Copyright (c) 2012-2015 Etnaviv Project 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sub license, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the 12 * next paragraph) shall be included in all copies or substantial portions 13 * of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Wladimir J. van der Laan <laanwj@gmail.com> 25 */ 26 27#include "etnaviv_blend.h" 28 29#include "etnaviv_context.h" 30#include "etnaviv_translate.h" 31#include "pipe/p_defines.h" 32#include "util/u_memory.h" 33 34void * 35etna_blend_state_create(struct pipe_context *pctx, 36 const struct pipe_blend_state *so) 37{ 38 const struct pipe_rt_blend_state *rt0 = &so->rt[0]; 39 struct etna_blend_state *co = CALLOC_STRUCT(etna_blend_state); 40 41 if (!co) 42 return NULL; 43 44 co->base = *so; 45 46 /* Enable blending if 47 * - blend enabled in blend state 48 * - NOT source factor is ONE and destination factor ZERO for both rgb and 49 * alpha (which would mean that blending is effectively disabled) 50 */ 51 bool enable = rt0->blend_enable && 52 !(rt0->rgb_src_factor == PIPE_BLENDFACTOR_ONE && 53 rt0->rgb_dst_factor == PIPE_BLENDFACTOR_ZERO && 54 rt0->alpha_src_factor == PIPE_BLENDFACTOR_ONE && 55 rt0->alpha_dst_factor == PIPE_BLENDFACTOR_ZERO); 56 57 /* Enable separate alpha if 58 * - Blending enabled (see above) 59 * - NOT source factor is equal to destination factor for both rgb abd 60 * alpha (which would effectively that mean alpha is not separate) 61 */ 62 bool separate_alpha = enable && 63 !(rt0->rgb_src_factor == rt0->alpha_src_factor && 64 rt0->rgb_dst_factor == rt0->alpha_dst_factor); 65 66 /* If the complete render target is written, set full_overwrite: 67 * - The color mask is 1111 68 * - No blending is used 69 */ 70 bool full_overwrite = (rt0->colormask == 15) && !enable; 71 72 if (enable) { 73 co->PE_ALPHA_CONFIG = 74 VIVS_PE_ALPHA_CONFIG_BLEND_ENABLE_COLOR | 75 COND(separate_alpha, VIVS_PE_ALPHA_CONFIG_BLEND_SEPARATE_ALPHA) | 76 VIVS_PE_ALPHA_CONFIG_SRC_FUNC_COLOR(translate_blend_factor(rt0->rgb_src_factor)) | 77 VIVS_PE_ALPHA_CONFIG_SRC_FUNC_ALPHA(translate_blend_factor(rt0->alpha_src_factor)) | 78 VIVS_PE_ALPHA_CONFIG_DST_FUNC_COLOR(translate_blend_factor(rt0->rgb_dst_factor)) | 79 VIVS_PE_ALPHA_CONFIG_DST_FUNC_ALPHA(translate_blend_factor(rt0->alpha_dst_factor)) | 80 VIVS_PE_ALPHA_CONFIG_EQ_COLOR(translate_blend(rt0->rgb_func)) | 81 VIVS_PE_ALPHA_CONFIG_EQ_ALPHA(translate_blend(rt0->alpha_func)); 82 } else { 83 co->PE_ALPHA_CONFIG = 0; 84 } 85 86 co->PE_COLOR_FORMAT = 87 VIVS_PE_COLOR_FORMAT_COMPONENTS(rt0->colormask) | 88 COND(full_overwrite, VIVS_PE_COLOR_FORMAT_OVERWRITE); 89 90 co->PE_LOGIC_OP = 91 VIVS_PE_LOGIC_OP_OP(so->logicop_enable ? so->logicop_func : LOGIC_OP_COPY) | 92 0x000E4000 /* ??? */; 93 94 /* independent_blend_enable not needed: only one rt supported */ 95 /* XXX alpha_to_coverage / alpha_to_one? */ 96 /* Set dither registers based on dither status. These registers set the 97 * dither pattern, 98 * for now, set the same values as the blob. 99 */ 100 if (so->dither) { 101 co->PE_DITHER[0] = 0x6e4ca280; 102 co->PE_DITHER[1] = 0x5d7f91b3; 103 } else { 104 co->PE_DITHER[0] = 0xffffffff; 105 co->PE_DITHER[1] = 0xffffffff; 106 } 107 108 return co; 109} 110