conservativeraster.c revision 01e04c3f 
1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2018 Rhys Perry
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26/**
27 * \file conservativeraster.c
28 * glConservativeRasterParameteriNV and glConservativeRasterParameterfNV functions
29 */
30
31#include "conservativeraster.h"
32#include "context.h"
33#include "enums.h"
34
35static ALWAYS_INLINE void
36conservative_raster_parameter(GLenum pname, GLfloat param,
37                              bool no_error, const char *func)
38{
39   GET_CURRENT_CONTEXT(ctx);
40
41   if (!no_error && !ctx->Extensions.NV_conservative_raster_dilate &&
42       !ctx->Extensions.NV_conservative_raster_pre_snap_triangles) {
43      _mesa_error(ctx, GL_INVALID_OPERATION, "%s not supported", func);
44      return;
45   }
46
47   if (MESA_VERBOSE & VERBOSE_API)
48      _mesa_debug(ctx, "%s(%s, %g)\n",
49                  func, _mesa_enum_to_string(pname), param);
50
51   ASSERT_OUTSIDE_BEGIN_END(ctx);
52
53   switch (pname) {
54   case GL_CONSERVATIVE_RASTER_DILATE_NV:
55      if (!no_error && !ctx->Extensions.NV_conservative_raster_dilate)
56         goto invalid_pname_enum;
57
58      if (!no_error && param<0.0) {
59         _mesa_error(ctx, GL_INVALID_VALUE, "%s(param=%g)", func, param);
60         return;
61      }
62      ctx->ConservativeRasterDilate =
63         CLAMP(param,
64               ctx->Const.ConservativeRasterDilateRange[0],
65               ctx->Const.ConservativeRasterDilateRange[1]);
66      break;
67   case GL_CONSERVATIVE_RASTER_MODE_NV:
68      if (!no_error && !ctx->Extensions.NV_conservative_raster_pre_snap_triangles)
69         goto invalid_pname_enum;
70
71      if (!no_error && param != GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV &&
72          param != GL_CONSERVATIVE_RASTER_MODE_PRE_SNAP_TRIANGLES_NV) {
73         _mesa_error(ctx, GL_INVALID_ENUM,
74                     "%s(pname=%s)", func, _mesa_enum_to_string(param));
75         return;
76      }
77      ctx->ConservativeRasterMode = param;
78      break;
79   default:
80      goto invalid_pname_enum;
81      break;
82   }
83
84   FLUSH_VERTICES(ctx, 0);
85   ctx->NewDriverState |=
86      ctx->DriverFlags.NewNvConservativeRasterizationParams;
87
88   return;
89invalid_pname_enum:
90   if (!no_error)
91      _mesa_error(ctx, GL_INVALID_ENUM, "%s(pname=%s)",
92                  func, _mesa_enum_to_string(pname));
93}
94
95void GLAPIENTRY
96_mesa_ConservativeRasterParameteriNV_no_error(GLenum pname, GLint param)
97{
98   conservative_raster_parameter(pname, param, true,
99                                 "glConservativeRasterParameteriNV");
100}
101
102void GLAPIENTRY
103_mesa_ConservativeRasterParameteriNV(GLenum pname, GLint param)
104{
105   conservative_raster_parameter(pname, param, false,
106                                 "glConservativeRasterParameteriNV");
107}
108
109void GLAPIENTRY
110_mesa_ConservativeRasterParameterfNV_no_error(GLenum pname, GLfloat param)
111{
112   conservative_raster_parameter(pname, param, true,
113                                 "glConservativeRasterParameterfNV");
114}
115
116void GLAPIENTRY
117_mesa_ConservativeRasterParameterfNV(GLenum pname, GLfloat param)
118{
119   conservative_raster_parameter(pname, param, false,
120                                 "glConservativeRasterParameterfNV");
121}
122
123void
124_mesa_init_conservative_raster(struct gl_context *ctx)
125{
126   ctx->ConservativeRasterDilate = 0.0;
127   ctx->ConservativeRasterMode = GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV;
128}
129