1 /* 2 * Copyright © 2013 Intel Corporation 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 21 * DEALINGS IN THE SOFTWARE. 22 */ 23 24 /** 25 * \file elk_vec4_gs_visitor.h 26 * 27 * Geometry-shader-specific code derived from the vec4_visitor class. 28 */ 29 30 #pragma once 31 32 #include "elk_vec4.h" 33 34 #define MAX_GS_INPUT_VERTICES 6 35 36 #ifdef __cplusplus 37 namespace elk { 38 39 class vec4_gs_visitor : public vec4_visitor 40 { 41 public: 42 vec4_gs_visitor(const struct elk_compiler *compiler, 43 const struct elk_compile_params *params, 44 struct elk_gs_compile *c, 45 struct elk_gs_prog_data *prog_data, 46 const nir_shader *shader, 47 bool no_spills, 48 bool debug_enabled); 49 50 protected: 51 virtual void setup_payload(); 52 virtual void emit_prolog(); 53 virtual void emit_thread_end(); 54 virtual void emit_urb_write_header(int mrf); 55 virtual vec4_instruction *emit_urb_write_opcode(bool complete); 56 virtual void gs_emit_vertex(int stream_id); 57 virtual void gs_end_primitive(); 58 virtual void nir_emit_intrinsic(nir_intrinsic_instr *instr); 59 60 protected: 61 int setup_varying_inputs(int payload_reg, int attributes_per_reg); 62 void emit_control_data_bits(); 63 void set_stream_control_data_bits(unsigned stream_id); 64 65 src_reg vertex_count; 66 src_reg control_data_bits; 67 const struct elk_gs_compile * const c; 68 struct elk_gs_prog_data * const gs_prog_data; 69 }; 70 71 } /* namespace elk */ 72 #endif /* __cplusplus */ 73