api_validate.c revision 58e991705392a2e17a1c8b034f4083a0adaf1943 
1
2/* $Id: api_validate.c,v 1.3 2001/01/05 02:26:48 keithw 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
34
35GLboolean
36_mesa_validate_DrawElements(GLcontext *ctx,
37			    GLenum mode, GLsizei count, GLenum type,
38			    const GLvoid *indices)
39{
40   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,  GL_FALSE);
41
42   if (count <= 0) {
43      if (count < 0)
44	 gl_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
45      return GL_FALSE;
46   }
47
48   if (mode < 0 ||
49       mode > GL_POLYGON) {
50      gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
51      return GL_FALSE;
52   }
53
54   if (type != GL_UNSIGNED_INT &&
55       type != GL_UNSIGNED_BYTE &&
56       type != GL_UNSIGNED_SHORT)
57   {
58      gl_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
59      return GL_FALSE;
60   }
61
62   if (ctx->NewState)
63      gl_update_state( ctx );
64
65   if (!ctx->Array.Vertex.Enabled)
66      return GL_FALSE;
67
68   return GL_TRUE;
69}
70
71
72GLboolean
73_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
74				 GLuint start, GLuint end,
75				 GLsizei count, GLenum type,
76				 const GLvoid *indices)
77{
78   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
79
80   if (count <= 0) {
81      if (count < 0)
82	 gl_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
83      return GL_FALSE;
84   }
85
86   if (mode < 0 || mode > GL_POLYGON) {
87      gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
88      return GL_FALSE;
89   }
90
91   if (end < start) {
92      gl_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
93      return GL_FALSE;
94   }
95
96   if (type != GL_UNSIGNED_INT &&
97       type != GL_UNSIGNED_BYTE &&
98       type != GL_UNSIGNED_SHORT)
99   {
100      gl_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
101      return GL_FALSE;
102   }
103
104   if (ctx->NewState)
105      gl_update_state( ctx );
106
107   if (!ctx->Array.Vertex.Enabled)
108      return GL_FALSE;
109
110   return GL_TRUE;
111}
112
113
114
115GLboolean
116_mesa_validate_DrawArrays(GLcontext *ctx,
117			  GLenum mode, GLint start, GLsizei count)
118{
119   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
120
121   if (count<0) {
122      gl_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
123      return GL_FALSE;
124   }
125
126   if (mode < 0 || mode > GL_POLYGON) {
127      gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
128      return GL_FALSE;
129   }
130
131   if (ctx->NewState)
132      gl_update_state( ctx );
133
134   if (!ctx->Array.Vertex.Enabled)
135      return GL_FALSE;
136
137   return GL_TRUE;
138}
139
140