conservativeraster.c revision 7ec681f3 
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
63      FLUSH_VERTICES(ctx, 0, 0);
64      ctx->NewDriverState |=
65         ctx->DriverFlags.NewNvConservativeRasterizationParams;
66
67      ctx->ConservativeRasterDilate =
68         CLAMP(param,
69               ctx->Const.ConservativeRasterDilateRange[0],
70               ctx->Const.ConservativeRasterDilateRange[1]);
71      break;
72   case GL_CONSERVATIVE_RASTER_MODE_NV:
73      if (!no_error && !ctx->Extensions.NV_conservative_raster_pre_snap_triangles)
74         goto invalid_pname_enum;
75
76      if (!no_error && param != GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV &&
77          param != GL_CONSERVATIVE_RASTER_MODE_PRE_SNAP_TRIANGLES_NV) {
78         _mesa_error(ctx, GL_INVALID_ENUM,
79                     "%s(pname=%s)", func, _mesa_enum_to_string(param));
80         return;
81      }
82
83      FLUSH_VERTICES(ctx, 0, 0);
84      ctx->NewDriverState |=
85         ctx->DriverFlags.NewNvConservativeRasterizationParams;
86
87      ctx->ConservativeRasterMode = param;
88      break;
89   default:
90      goto invalid_pname_enum;
91      break;
92   }
93
94   return;
95invalid_pname_enum:
96   if (!no_error)
97      _mesa_error(ctx, GL_INVALID_ENUM, "%s(pname=%s)",
98                  func, _mesa_enum_to_string(pname));
99}
100
101void GLAPIENTRY
102_mesa_ConservativeRasterParameteriNV_no_error(GLenum pname, GLint param)
103{
104   conservative_raster_parameter(pname, param, true,
105                                 "glConservativeRasterParameteriNV");
106}
107
108void GLAPIENTRY
109_mesa_ConservativeRasterParameteriNV(GLenum pname, GLint param)
110{
111   conservative_raster_parameter(pname, param, false,
112                                 "glConservativeRasterParameteriNV");
113}
114
115void GLAPIENTRY
116_mesa_ConservativeRasterParameterfNV_no_error(GLenum pname, GLfloat param)
117{
118   conservative_raster_parameter(pname, param, true,
119                                 "glConservativeRasterParameterfNV");
120}
121
122void GLAPIENTRY
123_mesa_ConservativeRasterParameterfNV(GLenum pname, GLfloat param)
124{
125   conservative_raster_parameter(pname, param, false,
126                                 "glConservativeRasterParameterfNV");
127}
128
129void
130_mesa_init_conservative_raster(struct gl_context *ctx)
131{
132   ctx->ConservativeRasterDilate = 0.0;
133   ctx->ConservativeRasterMode = GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV;
134}
135