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_vec4.h"
38
39/**
40 * The VF can't natively handle certain types of attributes, such as GL_FIXED
41 * or most 10_10_10_2 types.  These flags enable various VS workarounds to
42 * "fix" attributes at the beginning of shaders.
43 */
44#define BRW_ATTRIB_WA_COMPONENT_MASK    7  /* mask for GL_FIXED scale channel count */
45#define BRW_ATTRIB_WA_NORMALIZE     8   /* normalize in shader */
46#define BRW_ATTRIB_WA_BGRA          16  /* swap r/b channels in shader */
47#define BRW_ATTRIB_WA_SIGN          32  /* interpret as signed in shader */
48#define BRW_ATTRIB_WA_SCALE         64  /* interpret as scaled in shader */
49
50#ifdef __cplusplus
51extern "C" {
52#endif
53
54GLbitfield64
55brw_vs_outputs_written(struct brw_context *brw, struct brw_vs_prog_key *key,
56                       GLbitfield64 outputs_written);
57
58void
59brw_upload_vs_prog(struct brw_context *brw);
60
61void
62brw_vs_populate_key(struct brw_context *brw,
63                    struct brw_vs_prog_key *key);
64
65#ifdef __cplusplus
66} /* extern "C" */
67
68
69namespace brw {
70
71class vec4_vs_visitor : public vec4_visitor
72{
73public:
74   vec4_vs_visitor(const struct brw_compiler *compiler,
75                   void *log_data,
76                   const struct brw_vs_prog_key *key,
77                   struct brw_vs_prog_data *vs_prog_data,
78                   const nir_shader *shader,
79                   gl_clip_plane *clip_planes,
80                   void *mem_ctx,
81                   int shader_time_index,
82                   bool use_legacy_snorm_formula);
83
84protected:
85   virtual dst_reg *make_reg_for_system_value(int location);
86   virtual void setup_payload();
87   virtual void emit_prolog();
88   virtual void emit_thread_end();
89   virtual void emit_urb_write_header(int mrf);
90   virtual void emit_urb_slot(dst_reg reg, int varying);
91   virtual vec4_instruction *emit_urb_write_opcode(bool complete);
92
93private:
94   int setup_attributes(int payload_reg);
95   void setup_uniform_clipplane_values();
96   void emit_clip_distances(dst_reg reg, int offset);
97
98   const struct brw_vs_prog_key *const key;
99   struct brw_vs_prog_data * const vs_prog_data;
100
101   gl_clip_plane *clip_planes;
102
103   bool use_legacy_snorm_formula;
104};
105
106} /* namespace brw */
107
108
109#endif
110
111#endif
112