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"
27 #include "bufferobj.h"
30 #include "mfeatures.h"
36 * \return number of bytes in array [count] of type.
39 index_bytes(GLenum type
, GLsizei count
)
41 if (type
== GL_UNSIGNED_INT
) {
42 return count
* sizeof(GLuint
);
44 else if (type
== GL_UNSIGNED_BYTE
) {
45 return count
* sizeof(GLubyte
);
48 ASSERT(type
== GL_UNSIGNED_SHORT
);
49 return count
* sizeof(GLushort
);
55 * Find the max index in the given element/index buffer
58 _mesa_max_buffer_index(struct gl_context
*ctx
, GLuint count
, GLenum type
,
60 struct gl_buffer_object
*elementBuf
)
62 const GLubyte
*map
= NULL
;
66 if (_mesa_is_bufferobj(elementBuf
)) {
67 /* elements are in a user-defined buffer object. need to map it */
68 map
= ctx
->Driver
.MapBuffer(ctx
, GL_ELEMENT_ARRAY_BUFFER
,
69 GL_READ_ONLY
, elementBuf
);
70 /* Actual address is the sum of pointers */
71 indices
= (const GLvoid
*) ADD_POINTERS(map
, (const GLubyte
*) indices
);
74 if (type
== GL_UNSIGNED_INT
) {
75 for (i
= 0; i
< count
; i
++)
76 if (((GLuint
*) indices
)[i
] > max
)
77 max
= ((GLuint
*) indices
)[i
];
79 else if (type
== GL_UNSIGNED_SHORT
) {
80 for (i
= 0; i
< count
; i
++)
81 if (((GLushort
*) indices
)[i
] > max
)
82 max
= ((GLushort
*) indices
)[i
];
85 ASSERT(type
== GL_UNSIGNED_BYTE
);
86 for (i
= 0; i
< count
; i
++)
87 if (((GLubyte
*) indices
)[i
] > max
)
88 max
= ((GLubyte
*) indices
)[i
];
92 ctx
->Driver
.UnmapBuffer(ctx
, GL_ELEMENT_ARRAY_BUFFER_ARB
, elementBuf
);
100 * Check if OK to draw arrays/elements.
103 check_valid_to_render(struct gl_context
*ctx
, const char *function
)
105 if (!_mesa_valid_to_render(ctx
, function
)) {
112 /* For ES2, we can draw if any vertex array is enabled (and we
113 * should always have a vertex program/shader). */
114 if (ctx
->Array
.ArrayObj
->_Enabled
== 0x0 || !ctx
->VertexProgram
._Current
)
121 /* For OpenGL ES, only draw if we have vertex positions
123 if (!ctx
->Array
.ArrayObj
->Vertex
.Enabled
)
131 const struct gl_shader_program
*vsProg
=
132 ctx
->Shader
.CurrentVertexProgram
;
133 GLboolean haveVertexShader
= (vsProg
&& vsProg
->LinkStatus
);
134 GLboolean haveVertexProgram
= ctx
->VertexProgram
._Enabled
;
135 if (haveVertexShader
|| haveVertexProgram
) {
136 /* Draw regardless of whether or not we have any vertex arrays.
137 * (Ex: could draw a point using a constant vertex pos)
142 /* Draw if we have vertex positions (GL_VERTEX_ARRAY or generic
145 return (ctx
->Array
.ArrayObj
->Vertex
.Enabled
||
146 ctx
->Array
.ArrayObj
->VertexAttrib
[0].Enabled
);
161 * Do bounds checking on array element indexes. Check that the vertices
162 * pointed to by the indices don't lie outside buffer object bounds.
163 * \return GL_TRUE if OK, GL_FALSE if any indexed vertex goes is out of bounds
166 check_index_bounds(struct gl_context
*ctx
, GLsizei count
, GLenum type
,
167 const GLvoid
*indices
, GLint basevertex
)
169 struct _mesa_prim prim
;
170 struct _mesa_index_buffer ib
;
173 /* Only the X Server needs to do this -- otherwise, accessing outside
174 * array/BO bounds allows application termination.
176 if (!ctx
->Const
.CheckArrayBounds
)
179 memset(&prim
, 0, sizeof(prim
));
182 memset(&ib
, 0, sizeof(ib
));
185 ib
.obj
= ctx
->Array
.ElementArrayBufferObj
;
187 vbo_get_minmax_index(ctx
, &prim
, &ib
, &min
, &max
);
189 if ((int)(min
+ basevertex
) < 0 ||
190 max
+ basevertex
> ctx
->Array
.ArrayObj
->_MaxElement
) {
191 /* the max element is out of bounds of one or more enabled arrays */
192 _mesa_warning(ctx
, "glDrawElements() index=%u is out of bounds (max=%u)",
193 max
, ctx
->Array
.ArrayObj
->_MaxElement
);
202 * Error checking for glDrawElements(). Includes parameter checking
203 * and VBO bounds checking.
204 * \return GL_TRUE if OK to render, GL_FALSE if error found
207 _mesa_validate_DrawElements(struct gl_context
*ctx
,
208 GLenum mode
, GLsizei count
, GLenum type
,
209 const GLvoid
*indices
, GLint basevertex
)
211 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
215 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawElements(count)" );
219 if (mode
> GL_TRIANGLE_STRIP_ADJACENCY_ARB
) {
220 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawElements(mode)" );
224 if (type
!= GL_UNSIGNED_INT
&&
225 type
!= GL_UNSIGNED_BYTE
&&
226 type
!= GL_UNSIGNED_SHORT
)
228 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawElements(type)" );
232 if (!check_valid_to_render(ctx
, "glDrawElements"))
235 /* Vertex buffer object tests */
236 if (_mesa_is_bufferobj(ctx
->Array
.ElementArrayBufferObj
)) {
237 /* use indices in the buffer object */
238 /* make sure count doesn't go outside buffer bounds */
239 if (index_bytes(type
, count
) > ctx
->Array
.ElementArrayBufferObj
->Size
) {
240 _mesa_warning(ctx
, "glDrawElements index out of buffer bounds");
245 /* not using a VBO */
250 if (!check_index_bounds(ctx
, count
, type
, indices
, basevertex
))
258 * Error checking for glDrawRangeElements(). Includes parameter checking
259 * and VBO bounds checking.
260 * \return GL_TRUE if OK to render, GL_FALSE if error found
263 _mesa_validate_DrawRangeElements(struct gl_context
*ctx
, GLenum mode
,
264 GLuint start
, GLuint end
,
265 GLsizei count
, GLenum type
,
266 const GLvoid
*indices
, GLint basevertex
)
268 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
272 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawRangeElements(count)" );
276 if (mode
> GL_TRIANGLE_STRIP_ADJACENCY_ARB
) {
277 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawRangeElements(mode)" );
282 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawRangeElements(end<start)");
286 if (type
!= GL_UNSIGNED_INT
&&
287 type
!= GL_UNSIGNED_BYTE
&&
288 type
!= GL_UNSIGNED_SHORT
) {
289 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawRangeElements(type)" );
293 if (!check_valid_to_render(ctx
, "glDrawRangeElements"))
296 /* Vertex buffer object tests */
297 if (_mesa_is_bufferobj(ctx
->Array
.ElementArrayBufferObj
)) {
298 /* use indices in the buffer object */
299 /* make sure count doesn't go outside buffer bounds */
300 if (index_bytes(type
, count
) > ctx
->Array
.ElementArrayBufferObj
->Size
) {
301 _mesa_warning(ctx
, "glDrawRangeElements index out of buffer bounds");
306 /* not using a VBO */
311 if (!check_index_bounds(ctx
, count
, type
, indices
, basevertex
))
319 * Called from the tnl module to error check the function parameters and
320 * verify that we really can draw something.
321 * \return GL_TRUE if OK to render, GL_FALSE if error found
324 _mesa_validate_DrawArrays(struct gl_context
*ctx
,
325 GLenum mode
, GLint start
, GLsizei count
)
327 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
331 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDrawArrays(count)" );
335 if (mode
> GL_TRIANGLE_STRIP_ADJACENCY_ARB
) {
336 _mesa_error(ctx
, GL_INVALID_ENUM
, "glDrawArrays(mode)" );
340 if (!check_valid_to_render(ctx
, "glDrawArrays"))
343 if (ctx
->Const
.CheckArrayBounds
) {
344 if (start
+ count
> (GLint
) ctx
->Array
.ArrayObj
->_MaxElement
)
353 _mesa_validate_DrawArraysInstanced(struct gl_context
*ctx
, GLenum mode
, GLint first
,
354 GLsizei count
, GLsizei numInstances
)
356 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
360 _mesa_error(ctx
, GL_INVALID_VALUE
,
361 "glDrawArraysInstanced(count=%d)", count
);
365 if (mode
> GL_TRIANGLE_STRIP_ADJACENCY_ARB
) {
366 _mesa_error(ctx
, GL_INVALID_ENUM
,
367 "glDrawArraysInstanced(mode=0x%x)", mode
);
371 if (numInstances
<= 0) {
372 if (numInstances
< 0)
373 _mesa_error(ctx
, GL_INVALID_VALUE
,
374 "glDrawArraysInstanced(numInstances=%d)", numInstances
);
378 if (!check_valid_to_render(ctx
, "glDrawArraysInstanced(invalid to render)"))
381 if (ctx
->CompileFlag
) {
382 _mesa_error(ctx
, GL_INVALID_OPERATION
,
383 "glDrawArraysInstanced(display list");
387 if (ctx
->Const
.CheckArrayBounds
) {
388 if (first
+ count
> (GLint
) ctx
->Array
.ArrayObj
->_MaxElement
)
397 _mesa_validate_DrawElementsInstanced(struct gl_context
*ctx
,
398 GLenum mode
, GLsizei count
, GLenum type
,
399 const GLvoid
*indices
, GLsizei numInstances
)
401 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
405 _mesa_error(ctx
, GL_INVALID_VALUE
,
406 "glDrawElementsInstanced(count=%d)", count
);
410 if (mode
> GL_TRIANGLE_STRIP_ADJACENCY_ARB
) {
411 _mesa_error(ctx
, GL_INVALID_ENUM
,
412 "glDrawElementsInstanced(mode = 0x%x)", mode
);
416 if (type
!= GL_UNSIGNED_INT
&&
417 type
!= GL_UNSIGNED_BYTE
&&
418 type
!= GL_UNSIGNED_SHORT
) {
419 _mesa_error(ctx
, GL_INVALID_ENUM
,
420 "glDrawElementsInstanced(type=0x%x)", type
);
424 if (numInstances
<= 0) {
425 if (numInstances
< 0)
426 _mesa_error(ctx
, GL_INVALID_VALUE
,
427 "glDrawElementsInstanced(numInstances=%d)", numInstances
);
431 if (!check_valid_to_render(ctx
, "glDrawElementsInstanced"))
434 /* Vertex buffer object tests */
435 if (_mesa_is_bufferobj(ctx
->Array
.ElementArrayBufferObj
)) {
436 /* use indices in the buffer object */
437 /* make sure count doesn't go outside buffer bounds */
438 if (index_bytes(type
, count
) > ctx
->Array
.ElementArrayBufferObj
->Size
) {
440 "glDrawElementsInstanced index out of buffer bounds");
445 /* not using a VBO */
450 if (!check_index_bounds(ctx
, count
, type
, indices
, 0))