api_validate.c revision 61bac6014aa15e0bec134e290aebac18f9815299 
1/* $Id: api_validate.c,v 1.6 2002/04/21 21:04:46 brianp Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version:  4.1
6 *
7 * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27#include "glheader.h"
28#include "api_validate.h"
29#include "context.h"
30#include "mtypes.h"
31#include "state.h"
32
33
34GLboolean
35_mesa_validate_DrawElements(GLcontext *ctx,
36			    GLenum mode, GLsizei count, GLenum type,
37			    const GLvoid *indices)
38{
39   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,  GL_FALSE);
40
41   if (count <= 0) {
42      if (count < 0)
43	 _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
44      return GL_FALSE;
45   }
46
47   if (mode < 0 ||
48       mode > GL_POLYGON) {
49      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
50      return GL_FALSE;
51   }
52
53   if (type != GL_UNSIGNED_INT &&
54       type != GL_UNSIGNED_BYTE &&
55       type != GL_UNSIGNED_SHORT)
56   {
57      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
58      return GL_FALSE;
59   }
60
61   if (ctx->NewState)
62      _mesa_update_state( ctx );
63
64   if (ctx->Array.Vertex.Enabled
65       || (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
66      return GL_TRUE;
67   else
68      return GL_FALSE;
69
70   return GL_TRUE;
71}
72
73
74GLboolean
75_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
76				 GLuint start, GLuint end,
77				 GLsizei count, GLenum type,
78				 const GLvoid *indices)
79{
80   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
81
82   if (count <= 0) {
83      if (count < 0)
84	 _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
85      return GL_FALSE;
86   }
87
88   if (mode < 0 || mode > GL_POLYGON) {
89      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
90      return GL_FALSE;
91   }
92
93   if (end < start) {
94      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
95      return GL_FALSE;
96   }
97
98   if (type != GL_UNSIGNED_INT &&
99       type != GL_UNSIGNED_BYTE &&
100       type != GL_UNSIGNED_SHORT) {
101      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
102      return GL_FALSE;
103   }
104
105   if (ctx->NewState)
106      _mesa_update_state( ctx );
107
108   if (ctx->Array.Vertex.Enabled
109       || (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
110      return GL_TRUE;
111   else
112      return GL_FALSE;
113}
114
115
116
117GLboolean
118_mesa_validate_DrawArrays(GLcontext *ctx,
119			  GLenum mode, GLint start, GLsizei count)
120{
121   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
122
123   if (count<0) {
124      _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
125      return GL_FALSE;
126   }
127
128   if (mode < 0 || mode > GL_POLYGON) {
129      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
130      return GL_FALSE;
131   }
132
133   if (ctx->NewState)
134      _mesa_update_state( ctx );
135
136   if (ctx->Array.Vertex.Enabled
137       || (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
138      return GL_TRUE;
139   else
140      return GL_FALSE;
141}
142