api_validate.c revision 8446d1bab15ef82b35b8980a0a56072ace6feb04 
1
2/* $Id: api_validate.c,v 1.2 2001/01/02 21:40:57 brianp Exp $ */
3
4/*
5 * Mesa 3-D graphics library
6 * Version:  3.5
7 *
8 * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
23 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
24 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28#include "glheader.h"
29#include "api_validate.h"
30#include "context.h"
31#include "mtypes.h"
32#include "state.h"
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	 gl_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
44      return GL_FALSE;
45   }
46
47   if (mode < 0 ||
48       mode > GL_POLYGON) {
49      gl_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      gl_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
58      return GL_FALSE;
59   }
60
61   if (ctx->NewState)
62      gl_update_state( ctx );
63
64   if (!ctx->Array.Vertex.Enabled)
65      return GL_FALSE;
66
67   return GL_TRUE;
68}
69
70
71GLboolean
72_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
73				 GLuint start, GLuint end,
74				 GLsizei count, GLenum type,
75				 const GLvoid *indices)
76{
77   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
78
79   if (count <= 0) {
80      if (count < 0)
81	 gl_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
82      return GL_FALSE;
83   }
84
85   if (mode < 0 || mode > GL_POLYGON) {
86      gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
87      return GL_FALSE;
88   }
89
90   if (end < start) {
91      gl_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
92      return GL_FALSE;
93   }
94
95   if (type != GL_UNSIGNED_INT &&
96       type != GL_UNSIGNED_BYTE &&
97       type != GL_UNSIGNED_SHORT)
98   {
99      gl_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
100      return GL_FALSE;
101   }
102
103   if (ctx->NewState)
104      gl_update_state( ctx );
105
106   if (!ctx->Array.Vertex.Enabled)
107      return GL_FALSE;
108
109   return GL_TRUE;
110}
111
112
113
114GLboolean
115_mesa_validate_DrawArrays(GLcontext *ctx,
116			  GLenum mode, GLint start, GLsizei count)
117{
118   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
119
120   if (count<0) {
121      gl_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
122      return GL_FALSE;
123   }
124
125   if (mode < 0 || mode > GL_POLYGON) {
126      gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
127      return GL_FALSE;
128   }
129
130   if (ctx->NewState)
131      gl_update_state( ctx );
132
133   if (!ctx->Array.Vertex.Enabled)
134      return GL_FALSE;
135
136   return GL_TRUE;
137}
138
139