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#include "api_exec_decl.h"
35
36#include "state_tracker/st_context.h"
37
38static ALWAYS_INLINE void
39conservative_raster_parameter(GLenum pname, GLfloat param,
40                              bool no_error, const char *func)
41{
42   GET_CURRENT_CONTEXT(ctx);
43
44   if (!no_error && !ctx->Extensions.NV_conservative_raster_dilate &&
45       !ctx->Extensions.NV_conservative_raster_pre_snap_triangles) {
46      _mesa_error(ctx, GL_INVALID_OPERATION, "%s not supported", func);
47      return;
48   }
49
50   if (MESA_VERBOSE & VERBOSE_API)
51      _mesa_debug(ctx, "%s(%s, %g)\n",
52                  func, _mesa_enum_to_string(pname), param);
53
54   ASSERT_OUTSIDE_BEGIN_END(ctx);
55
56   switch (pname) {
57   case GL_CONSERVATIVE_RASTER_DILATE_NV:
58      if (!no_error && !ctx->Extensions.NV_conservative_raster_dilate)
59         goto invalid_pname_enum;
60
61      if (!no_error && param<0.0) {
62         _mesa_error(ctx, GL_INVALID_VALUE, "%s(param=%g)", func, param);
63         return;
64      }
65
66      FLUSH_VERTICES(ctx, 0, 0);
67      ctx->NewDriverState |= ST_NEW_RASTERIZER;
68
69      ctx->ConservativeRasterDilate =
70         CLAMP(param,
71               ctx->Const.ConservativeRasterDilateRange[0],
72               ctx->Const.ConservativeRasterDilateRange[1]);
73      break;
74   case GL_CONSERVATIVE_RASTER_MODE_NV:
75      if (!no_error && !ctx->Extensions.NV_conservative_raster_pre_snap_triangles)
76         goto invalid_pname_enum;
77
78      if (!no_error && param != GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV &&
79          param != GL_CONSERVATIVE_RASTER_MODE_PRE_SNAP_TRIANGLES_NV) {
80         _mesa_error(ctx, GL_INVALID_ENUM,
81                     "%s(pname=%s)", func, _mesa_enum_to_string(param));
82         return;
83      }
84
85      FLUSH_VERTICES(ctx, 0, 0);
86      ctx->NewDriverState |= ST_NEW_RASTERIZER;
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