src/mesa/drivers/dri/i965/brw_vs.h

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keithw@vmware.com>
  30   */
  31
  32
  33 #ifndef BRW_VS_H
  34 #define BRW_VS_H
  35
  36
  37 #include "brw_context.h"
  38 #include "brw_eu.h"
  39 #include "brw_vec4.h"
  40 #include "program/program.h"
  41
  42 /**
  43  * The VF can't natively handle certain types of attributes, such as GL_FIXED
  44  * or most 10_10_10_2 types.  These flags enable various VS workarounds to
  45  * "fix" attributes at the beginning of shaders.
  46  */
  47 #define BRW_ATTRIB_WA_COMPONENT_MASK    7  /* mask for GL_FIXED scale channel count */
  48 #define BRW_ATTRIB_WA_NORMALIZE     8   /* normalize in shader */
  49 #define BRW_ATTRIB_WA_BGRA          16  /* swap r/b channels in shader */
  50 #define BRW_ATTRIB_WA_SIGN          32  /* interpret as signed in shader */
  51 #define BRW_ATTRIB_WA_SCALE         64  /* interpret as scaled in shader */
  52
  53 #ifdef __cplusplus
  54 extern "C" {
  55 #endif
  56
  57 const unsigned *brw_vs_emit(struct brw_context *brw,
  58                             void *mem_ctx,
  59                             const struct brw_vs_prog_key *key,
  60                             struct brw_vs_prog_data *prog_data,
  61                             struct gl_vertex_program *vp,
  62                             struct gl_shader_program *shader_prog,
  63                             unsigned *program_size);
  64 void brw_vs_debug_recompile(struct brw_context *brw,
  65                             struct gl_shader_program *prog,
  66                             const struct brw_vs_prog_key *key);
  67 bool brw_vs_prog_data_compare(const void *a, const void *b);
  68
  69 void
  70 brw_upload_vs_prog(struct brw_context *brw);
  71
  72 bool
  73 brw_codegen_vs_prog(struct brw_context *brw,
  74                     struct gl_shader_program *prog,
  75                     struct brw_vertex_program *vp,
  76                     struct brw_vs_prog_key *key);
  77
  78 #ifdef __cplusplus
  79 } /* extern "C" */
  80
  81
  82 namespace brw {
  83
  84 class vec4_vs_visitor : public vec4_visitor
  85 {
  86 public:
  87    vec4_vs_visitor(const struct brw_compiler *compiler,
  88                    void *log_data,
  89                    const struct brw_vs_prog_key *key,
  90                    struct brw_vs_prog_data *vs_prog_data,
  91                    struct gl_vertex_program *vp,
  92                    struct gl_shader_program *prog,
  93                    gl_clip_plane *clip_planes,
  94                    void *mem_ctx,
  95                    int shader_time_index,
  96                    bool use_legacy_snorm_formula);
  97
  98 protected:
  99    virtual dst_reg *make_reg_for_system_value(int location,
 100                                               const glsl_type *type);
 101    virtual void setup_payload();
 102    virtual void emit_prolog();
 103    virtual void emit_program_code();
 104    virtual void emit_thread_end();
 105    virtual void emit_urb_write_header(int mrf);
 106    virtual void emit_urb_slot(dst_reg reg, int varying);
 107    virtual vec4_instruction *emit_urb_write_opcode(bool complete);
 108
 109 private:
 110    int setup_attributes(int payload_reg);
 111    void setup_vp_regs();
 112    void setup_uniform_clipplane_values();
 113    void emit_clip_distances(dst_reg reg, int offset);
 114    dst_reg get_vp_dst_reg(const prog_dst_register &dst);
 115    src_reg get_vp_src_reg(const prog_src_register &src);
 116
 117    const struct brw_vs_prog_key *const key;
 118    struct brw_vs_prog_data * const vs_prog_data;
 119    struct gl_vertex_program *const vp;
 120    src_reg *vp_temp_regs;
 121    src_reg vp_addr_reg;
 122
 123    gl_clip_plane *clip_planes;
 124
 125    bool use_legacy_snorm_formula;
 126 };
 127
 128 } /* namespace brw */
 129
 130
 131 #endif
 132
 133 #endif