2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include "api_validate.h"
34 _mesa_validate_DrawElements(GLcontext
*ctx
,
35 GLenum mode
, GLsizei count
, GLenum type
,
36 const GLvoid
*indices
)
38 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
42 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawElements(count)" );
46 if (mode
> GL_POLYGON
) {
47 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawElements(mode)" );
51 if (type
!= GL_UNSIGNED_INT
&&
52 type
!= GL_UNSIGNED_BYTE
&&
53 type
!= GL_UNSIGNED_SHORT
)
55 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawElements(type)" );
60 _mesa_update_state(ctx
);
62 /* Always need vertex positions */
63 if (!ctx
->Array
.ArrayObj
->Vertex
.Enabled
64 && !(ctx
->VertexProgram
._Enabled
&& ctx
->Array
.ArrayObj
->VertexAttrib
[0].Enabled
))
67 /* Vertex buffer object tests */
68 if (ctx
->Array
.ElementArrayBufferObj
->Name
) {
71 /* use indices in the buffer object */
72 if (!ctx
->Array
.ElementArrayBufferObj
->Data
) {
73 _mesa_warning(ctx
, "DrawElements with empty vertex elements buffer!");
77 /* make sure count doesn't go outside buffer bounds */
78 if (type
== GL_UNSIGNED_INT
) {
79 indexBytes
= count
* sizeof(GLuint
);
81 else if (type
== GL_UNSIGNED_BYTE
) {
82 indexBytes
= count
* sizeof(GLubyte
);
85 ASSERT(type
== GL_UNSIGNED_SHORT
);
86 indexBytes
= count
* sizeof(GLushort
);
89 if ((GLubyte
*) indices
+ indexBytes
>
90 ctx
->Array
.ElementArrayBufferObj
->Data
+
91 ctx
->Array
.ElementArrayBufferObj
->Size
) {
92 _mesa_warning(ctx
, "glDrawElements index out of buffer bounds");
96 /* Actual address is the sum of pointers. Indices may be used below. */
97 if (ctx
->Const
.CheckArrayBounds
) {
98 indices
= (const GLvoid
*)
99 ADD_POINTERS(ctx
->Array
.ElementArrayBufferObj
->Data
,
100 (const GLubyte
*) indices
);
104 if (ctx
->Const
.CheckArrayBounds
) {
105 /* find max array index */
108 if (type
== GL_UNSIGNED_INT
) {
109 for (i
= 0; i
< count
; i
++)
110 if (((GLuint
*) indices
)[i
] > max
)
111 max
= ((GLuint
*) indices
)[i
];
113 else if (type
== GL_UNSIGNED_SHORT
) {
114 for (i
= 0; i
< count
; i
++)
115 if (((GLushort
*) indices
)[i
] > max
)
116 max
= ((GLushort
*) indices
)[i
];
119 ASSERT(type
== GL_UNSIGNED_BYTE
);
120 for (i
= 0; i
< count
; i
++)
121 if (((GLubyte
*) indices
)[i
] > max
)
122 max
= ((GLubyte
*) indices
)[i
];
124 if (max
>= ctx
->Array
._MaxElement
) {
125 /* the max element is out of bounds of one or more enabled arrays */
135 _mesa_validate_DrawRangeElements(GLcontext
*ctx
, GLenum mode
,
136 GLuint start
, GLuint end
,
137 GLsizei count
, GLenum type
,
138 const GLvoid
*indices
)
140 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
144 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawRangeElements(count)" );
148 if (mode
> GL_POLYGON
) {
149 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawRangeElements(mode)" );
154 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawRangeElements(end<start)");
158 if (type
!= GL_UNSIGNED_INT
&&
159 type
!= GL_UNSIGNED_BYTE
&&
160 type
!= GL_UNSIGNED_SHORT
) {
161 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawRangeElements(type)" );
166 _mesa_update_state(ctx
);
168 /* Always need vertex positions */
169 if (!ctx
->Array
.ArrayObj
->Vertex
.Enabled
170 && !(ctx
->VertexProgram
._Enabled
&& ctx
->Array
.ArrayObj
->VertexAttrib
[0].Enabled
))
173 if (ctx
->Const
.CheckArrayBounds
) {
174 /* Find max array index.
175 * We don't trust the user's start and end values.
179 if (type
== GL_UNSIGNED_INT
) {
180 for (i
= 0; i
< count
; i
++)
181 if (((GLuint
*) indices
)[i
] > max
)
182 max
= ((GLuint
*) indices
)[i
];
184 else if (type
== GL_UNSIGNED_SHORT
) {
185 for (i
= 0; i
< count
; i
++)
186 if (((GLushort
*) indices
)[i
] > max
)
187 max
= ((GLushort
*) indices
)[i
];
190 ASSERT(type
== GL_UNSIGNED_BYTE
);
191 for (i
= 0; i
< count
; i
++)
192 if (((GLubyte
*) indices
)[i
] > max
)
193 max
= ((GLubyte
*) indices
)[i
];
195 if (max
>= ctx
->Array
._MaxElement
) {
196 /* the max element is out of bounds of one or more enabled arrays */
206 * Called from the tnl module to error check the function parameters and
207 * verify that we really can draw something.
210 _mesa_validate_DrawArrays(GLcontext
*ctx
,
211 GLenum mode
, GLint start
, GLsizei count
)
213 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
216 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawArrays(count)" );
220 if (mode
> GL_POLYGON
) {
221 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawArrays(mode)" );
226 _mesa_update_state(ctx
);
228 /* Always need vertex positions */
229 if (!ctx
->Array
.ArrayObj
->Vertex
.Enabled
&& !ctx
->Array
.ArrayObj
->VertexAttrib
[0].Enabled
)
232 if (ctx
->Const
.CheckArrayBounds
) {
233 if (start
+ count
> (GLint
) ctx
->Array
._MaxElement
)