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      1 /*
      2  * Copyright  2014 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 DEALINGS
     21  * IN THE SOFTWARE.
     22  *
     23  */
     24 
     25 #ifndef GEN6_GS_VISITOR_H
     26 #define GEN6_GS_VISITOR_H
     27 
     28 #include "brw_vec4.h"
     29 #include "brw_vec4_gs_visitor.h"
     30 
     31 #ifdef __cplusplus
     32 
     33 namespace brw {
     34 
     35 class gen6_gs_visitor : public vec4_gs_visitor
     36 {
     37 public:
     38    gen6_gs_visitor(const struct brw_compiler *comp,
     39                    void *log_data,
     40                    struct brw_gs_compile *c,
     41                    struct brw_gs_prog_data *prog_data,
     42                    struct gl_program *prog,
     43                    const nir_shader *shader,
     44                    void *mem_ctx,
     45                    bool no_spills,
     46                    int shader_time_index) :
     47       vec4_gs_visitor(comp, log_data, c, prog_data, shader, mem_ctx, no_spills,
     48                       shader_time_index),
     49       prog(prog)
     50       {
     51       }
     52 
     53 protected:
     54    virtual void emit_prolog();
     55    virtual void emit_thread_end();
     56    virtual void gs_emit_vertex(int stream_id);
     57    virtual void gs_end_primitive();
     58    virtual void emit_urb_write_header(int mrf);
     59    virtual void emit_urb_write_opcode(bool complete,
     60                                       int base_mrf,
     61                                       int last_mrf,
     62                                       int urb_offset);
     63    virtual void setup_payload();
     64 
     65 private:
     66    void xfb_write();
     67    void xfb_program(unsigned vertex, unsigned num_verts);
     68    void xfb_setup();
     69    int get_vertex_output_offset_for_varying(int vertex, int varying);
     70 
     71    const struct gl_program *prog;
     72 
     73    src_reg vertex_output;
     74    src_reg vertex_output_offset;
     75    src_reg temp;
     76    src_reg first_vertex;
     77    src_reg prim_count;
     78    src_reg primitive_id;
     79 
     80    /* Transform Feedback members */
     81    src_reg sol_prim_written;
     82    src_reg svbi;
     83    src_reg max_svbi;
     84    src_reg destination_indices;
     85 };
     86 
     87 } /* namespace brw */
     88 
     89 #endif /* __cplusplus */
     90 
     91 #endif /* GEN6_GS_VISITOR_H */
     92