src/intel/compiler/brw_vec4_gs_visitor.h

   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 brw_vec4_gs_visitor.h
  26  *
  27  * Geometry-shader-specific code derived from the vec4_visitor class.
  28  */
  29
  30 #ifndef BRW_VEC4_GS_VISITOR_H
  31 #define BRW_VEC4_GS_VISITOR_H
  32
  33 #include "brw_vec4.h"
  34
  35 #define MAX_GS_INPUT_VERTICES 6
  36
  37 #ifdef __cplusplus
  38 namespace brw {
  39
  40 class vec4_gs_visitor : public vec4_visitor
  41 {
  42 public:
  43    vec4_gs_visitor(const struct brw_compiler *compiler,
  44                    void *log_data,
  45                    struct brw_gs_compile *c,
  46                    struct brw_gs_prog_data *prog_data,
  47                    const nir_shader *shader,
  48                    void *mem_ctx,
  49                    bool no_spills,
  50                    int shader_time_index);
  51
  52    virtual void nir_setup_inputs();
  53    virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr *instr);
  54
  55 protected:
  56    virtual dst_reg *make_reg_for_system_value(int location);
  57    virtual void setup_payload();
  58    virtual void emit_prolog();
  59    virtual void emit_thread_end();
  60    virtual void emit_urb_write_header(int mrf);
  61    virtual vec4_instruction *emit_urb_write_opcode(bool complete);
  62    virtual void gs_emit_vertex(int stream_id);
  63    virtual void gs_end_primitive();
  64    virtual void nir_emit_intrinsic(nir_intrinsic_instr *instr);
  65
  66 protected:
  67    int setup_varying_inputs(int payload_reg, int *attribute_map,
  68                             int attributes_per_reg);
  69    void emit_control_data_bits();
  70    void set_stream_control_data_bits(unsigned stream_id);
  71
  72    src_reg vertex_count;
  73    src_reg control_data_bits;
  74    const struct brw_gs_compile * const c;
  75    struct brw_gs_prog_data * const gs_prog_data;
  76 };
  77
  78 } /* namespace brw */
  79 #endif /* __cplusplus */
  80
  81 #endif /* BRW_VEC4_GS_VISITOR_H */