src/gallium/drivers/r600/sfn/sfn_shader_fragment.h

   1 /* -*- mesa-c++  -*-
   2  *
   3  * Copyright (c) 2019 Collabora LTD
   4  *
   5  * Author: Gert Wollny <gert.wollny@collabora.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * on the rights to use, copy, modify, merge, publish, distribute, sub
  11  * license, and/or sell copies of the Software, and to permit persons to whom
  12  * the Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #ifndef sfn_fragment_shader_from_nir_h
  28 #define sfn_fragment_shader_from_nir_h
  29
  30 #include "sfn_shader_base.h"
  31 #include "sfn_shaderio.h"
  32 #include <bitset>
  33
  34 namespace r600 {
  35
  36 class FragmentShaderFromNir : public ShaderFromNirProcessor {
  37 public:
  38    FragmentShaderFromNir(const nir_shader& nir, r600_shader& sh_info,
  39                          r600_pipe_shader_selector &sel, const r600_shader_key &key,
  40                          enum chip_class chip_class);
  41    bool scan_sysvalue_access(nir_instr *instr) override;
  42 private:
  43
  44    struct Interpolator {
  45       bool enabled;
  46       unsigned ij_index;
  47       PValue i;
  48       PValue j;
  49    };
  50
  51    void emit_shader_start() override;
  52    bool do_process_inputs(nir_variable *input) override;
  53    bool do_allocate_reserved_registers() override;
  54    bool do_process_outputs(nir_variable *output) override;
  55    bool do_emit_load_deref(const nir_variable *in_var, nir_intrinsic_instr* instr) override;
  56    bool do_emit_store_deref(const nir_variable *out_var, nir_intrinsic_instr* instr) override;
  57    bool emit_export_pixel(const nir_variable *, nir_intrinsic_instr* instr, bool all_chanels);
  58    bool load_interpolated(GPRVector &dest, ShaderInput &io, const Interpolator& ip,
  59                           int num_components, int start_comp);
  60    bool load_interpolated_one_comp(GPRVector &dest, ShaderInput& io, const Interpolator& ip, EAluOp op);
  61    bool load_interpolated_two_comp(GPRVector &dest, ShaderInput& io, const Interpolator& ip,EAluOp op, int writemask);
  62    bool load_interpolated_two_comp_for_one(GPRVector &dest,
  63                                            ShaderInput& io, const Interpolator& ip, EAluOp op, int start, int comp);
  64    bool emit_interp_deref_at_centroid(nir_intrinsic_instr* instr);
  65
  66    bool emit_intrinsic_instruction_override(nir_intrinsic_instr* instr) override;
  67    void do_finalize() override;
  68
  69    void load_front_face();
  70
  71    bool emit_load_front_face(nir_intrinsic_instr* instr);
  72    bool emit_load_sample_mask_in(nir_intrinsic_instr* instr);
  73    bool emit_load_sample_pos(nir_intrinsic_instr* instr);
  74    bool emit_load_sample_id(nir_intrinsic_instr* instr);
  75    bool emit_interp_deref_at_sample(nir_intrinsic_instr* instr);
  76    bool emit_interp_deref_at_offset(nir_intrinsic_instr* instr);
  77
  78    unsigned m_max_color_exports;
  79    unsigned m_max_counted_color_exports;
  80    bool m_two_sided_color;
  81    ExportInstruction *m_last_pixel_export;
  82    const nir_shader& m_nir;
  83
  84
  85    std::array<Interpolator, 6> m_interpolator;
  86    unsigned m_reserved_registers;
  87    unsigned m_frag_pos_index;
  88    PValue m_front_face_reg;
  89    PValue m_sample_mask_reg;
  90    PValue m_sample_id_reg;
  91    GPRVector m_frag_pos;
  92    bool m_need_back_color;
  93    bool m_front_face_loaded;
  94    ShaderIO m_shaderio;
  95    unsigned m_depth_exports;
  96
  97    std::map<unsigned, PValue> m_input_cache;
  98    bool m_enable_centroid_interpolators;
  99    unsigned m_apply_sample_mask;
 100 };
 101
 102 }
 103
 104 #endif