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 "pipe/p_format.h" 30 31 /* These structs encapsulates the blend state such that it can be lowered 32 * cleanly 33 */ 34 35 typedef struct { 36 enum blend_func func; 37 38 enum blend_factor src_factor; 39 bool invert_src_factor; 40 41 enum blend_factor dst_factor; 42 bool invert_dst_factor; 43 } nir_lower_blend_channel; 44 45 typedef struct { 46 nir_lower_blend_channel rgb; 47 nir_lower_blend_channel alpha; 48 49 /* 4-bit colormask. 0x0 for none, 0xF for RGBA, 0x1 for R */ 50 unsigned colormask; 51 } nir_lower_blend_rt; 52 53 typedef struct { 54 nir_lower_blend_rt rt[8]; 55 enum pipe_format format[8]; 56 57 bool logicop_enable; 58 unsigned logicop_func; 59 60 nir_ssa_def *src1; 61 62 /* If set, will use load_blend_const_color_{r,g,b,a}_float instead of 63 * load_blend_const_color_rgba */ 64 bool scalar_blend_const; 65 } nir_lower_blend_options; 66 67 void nir_lower_blend(nir_shader *shader, 68 const nir_lower_blend_options *options); 69 70 #endif 71