2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 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 * Find the max index in the given element/index buffer
37 max_buffer_index(GLcontext
*ctx
, GLuint count
, GLenum type
,
39 struct gl_buffer_object
*elementBuf
)
41 const GLubyte
*map
= NULL
;
45 if (elementBuf
->Name
) {
46 /* elements are in a user-defined buffer object. need to map it */
47 map
= ctx
->Driver
.MapBuffer(ctx
,
48 GL_ELEMENT_ARRAY_BUFFER_ARB
,
51 /* Actual address is the sum of pointers */
52 indices
= (const GLvoid
*) ADD_POINTERS(map
, (const GLubyte
*) indices
);
55 if (type
== GL_UNSIGNED_INT
) {
56 for (i
= 0; i
< count
; i
++)
57 if (((GLuint
*) indices
)[i
] > max
)
58 max
= ((GLuint
*) indices
)[i
];
60 else if (type
== GL_UNSIGNED_SHORT
) {
61 for (i
= 0; i
< count
; i
++)
62 if (((GLushort
*) indices
)[i
] > max
)
63 max
= ((GLushort
*) indices
)[i
];
66 ASSERT(type
== GL_UNSIGNED_BYTE
);
67 for (i
= 0; i
< count
; i
++)
68 if (((GLubyte
*) indices
)[i
] > max
)
69 max
= ((GLubyte
*) indices
)[i
];
73 ctx
->Driver
.UnmapBuffer(ctx
,
74 GL_ELEMENT_ARRAY_BUFFER_ARB
,
75 ctx
->Array
.ElementArrayBufferObj
);
82 check_valid_to_render(GLcontext
*ctx
, char *function
)
84 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
85 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
86 "glDraw%s(incomplete framebuffer)", function
);
90 /* Always need vertex positions, unless a vertex program is in use */
91 if (!ctx
->VertexProgram
._Current
&&
92 !ctx
->Array
.ArrayObj
->Vertex
.Enabled
&&
93 !ctx
->Array
.ArrayObj
->VertexAttrib
[0].Enabled
)
100 _mesa_validate_DrawElements(GLcontext
*ctx
,
101 GLenum mode
, GLsizei count
, GLenum type
,
102 const GLvoid
*indices
)
104 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
108 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawElements(count)" );
112 if (mode
> GL_POLYGON
) {
113 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawElements(mode)" );
117 if (type
!= GL_UNSIGNED_INT
&&
118 type
!= GL_UNSIGNED_BYTE
&&
119 type
!= GL_UNSIGNED_SHORT
)
121 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawElements(type)" );
126 _mesa_update_state(ctx
);
128 if (!check_valid_to_render(ctx
, "Elements"))
131 /* Vertex buffer object tests */
132 if (ctx
->Array
.ElementArrayBufferObj
->Name
) {
133 /* use indices in the buffer object */
136 if (!ctx
->Array
.ElementArrayBufferObj
->Size
) {
138 "glDrawElements called with empty array elements buffer");
142 if (type
== GL_UNSIGNED_INT
) {
143 indexBytes
= count
* sizeof(GLuint
);
145 else if (type
== GL_UNSIGNED_BYTE
) {
146 indexBytes
= count
* sizeof(GLubyte
);
149 ASSERT(type
== GL_UNSIGNED_SHORT
);
150 indexBytes
= count
* sizeof(GLushort
);
153 /* make sure count doesn't go outside buffer bounds */
154 if (indexBytes
> (GLuint
) ctx
->Array
.ElementArrayBufferObj
->Size
) {
155 _mesa_warning(ctx
, "glDrawElements index out of buffer bounds");
160 /* not using a VBO */
165 if (ctx
->Const
.CheckArrayBounds
) {
166 /* find max array index */
167 GLuint max
= max_buffer_index(ctx
, count
, type
, indices
,
168 ctx
->Array
.ElementArrayBufferObj
);
169 if (max
>= ctx
->Array
._MaxElement
) {
170 /* the max element is out of bounds of one or more enabled arrays */
179 _mesa_validate_DrawRangeElements(GLcontext
*ctx
, GLenum mode
,
180 GLuint start
, GLuint end
,
181 GLsizei count
, GLenum type
,
182 const GLvoid
*indices
)
184 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
188 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawRangeElements(count)" );
192 if (mode
> GL_POLYGON
) {
193 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawRangeElements(mode)" );
198 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawRangeElements(end<start)");
202 if (type
!= GL_UNSIGNED_INT
&&
203 type
!= GL_UNSIGNED_BYTE
&&
204 type
!= GL_UNSIGNED_SHORT
) {
205 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawRangeElements(type)" );
210 _mesa_update_state(ctx
);
212 if (!check_valid_to_render(ctx
, "RangeElements"))
215 /* Vertex buffer object tests */
216 if (ctx
->Array
.ElementArrayBufferObj
->Name
) {
217 /* use indices in the buffer object */
220 if (type
== GL_UNSIGNED_INT
) {
221 indexBytes
= count
* sizeof(GLuint
);
223 else if (type
== GL_UNSIGNED_BYTE
) {
224 indexBytes
= count
* sizeof(GLubyte
);
227 ASSERT(type
== GL_UNSIGNED_SHORT
);
228 indexBytes
= count
* sizeof(GLushort
);
231 /* make sure count doesn't go outside buffer bounds */
232 if (indexBytes
> ctx
->Array
.ElementArrayBufferObj
->Size
) {
233 _mesa_warning(ctx
, "glDrawRangeElements index out of buffer bounds");
238 /* not using a VBO */
243 if (ctx
->Const
.CheckArrayBounds
) {
244 GLuint max
= max_buffer_index(ctx
, count
, type
, indices
,
245 ctx
->Array
.ElementArrayBufferObj
);
246 if (max
>= ctx
->Array
._MaxElement
) {
247 /* the max element is out of bounds of one or more enabled arrays */
257 * Called from the tnl module to error check the function parameters and
258 * verify that we really can draw something.
261 _mesa_validate_DrawArrays(GLcontext
*ctx
,
262 GLenum mode
, GLint start
, GLsizei count
)
264 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
268 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawArrays(count)" );
272 if (mode
> GL_POLYGON
) {
273 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawArrays(mode)" );
278 _mesa_update_state(ctx
);
280 if (!check_valid_to_render(ctx
, "Arrays"))
283 if (ctx
->Const
.CheckArrayBounds
) {
284 if (start
+ count
> (GLint
) ctx
->Array
._MaxElement
)