1 /* 2 * Copyright © 2019 Alyssa Rosenzweig 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, sublicense, 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 next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * 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 NONINFRINGEMENT. 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 DEALINGS 21 * IN THE SOFTWARE. 22 * 23 */ 24 25 #ifndef NIR_BLEND_H 26 #define NIR_BLEND_H 27 28 #include "compiler/nir/nir.h" 29 #include "util/blend.h" 30 #include "util/format/u_formats.h" 31 32 /* These structs encapsulates the blend state such that it can be lowered 33 * cleanly 34 */ 35 36 typedef struct { 37 enum pipe_blend_func func; 38 enum pipe_blendfactor src_factor; 39 enum pipe_blendfactor dst_factor; 40 } nir_lower_blend_channel; 41 42 typedef struct { 43 nir_lower_blend_channel rgb; 44 nir_lower_blend_channel alpha; 45 46 /* 4-bit colormask. 0x0 for none, 0xF for RGBA, 0x1 for R */ 47 unsigned colormask; 48 } nir_lower_blend_rt; 49 50 typedef struct { 51 nir_lower_blend_rt rt[8]; 52 enum pipe_format format[8]; 53 54 bool logicop_enable; 55 enum pipe_logicop logicop_func; 56 57 /* If set, will use load_blend_const_color_{r,g,b,a}_float instead of 58 * load_blend_const_color_rgba */ 59 bool scalar_blend_const; 60 } nir_lower_blend_options; 61 62 bool nir_lower_blend(nir_shader *shader, 63 const nir_lower_blend_options *options); 64 65 #endif 66