1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright 2009 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
29 #include "main/glheader.h"
30 #include "main/context.h"
31 #include "main/state.h"
32 #include "main/api_validate.h"
33 #include "main/varray.h"
34 #include "main/bufferobj.h"
35 #include "main/enums.h"
36 #include "main/macros.h"
37 #include "main/transformfeedback.h"
39 #include "vbo_context.h"
43 * All vertex buffers should be in an unmapped state when we're about
44 * to draw. This debug function checks that.
47 check_buffers_are_unmapped(const struct gl_client_array
**inputs
)
52 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
54 struct gl_buffer_object
*obj
= inputs
[i
]->BufferObj
;
55 assert(!_mesa_bufferobj_mapped(obj
));
64 * A debug function that may be called from other parts of Mesa as
65 * needed during debugging.
68 vbo_check_buffers_are_unmapped(struct gl_context
*ctx
)
70 struct vbo_context
*vbo
= vbo_context(ctx
);
71 struct vbo_exec_context
*exec
= &vbo
->exec
;
72 /* check the current vertex arrays */
73 check_buffers_are_unmapped(exec
->array
.inputs
);
74 /* check the current glBegin/glVertex/glEnd-style VBO */
75 assert(!_mesa_bufferobj_mapped(exec
->vtx
.bufferobj
));
81 * Compute min and max elements by scanning the index buffer for
82 * glDraw[Range]Elements() calls.
83 * If primitive restart is enabled, we need to ignore restart
84 * indexes when computing min/max.
87 vbo_get_minmax_index(struct gl_context
*ctx
,
88 const struct _mesa_prim
*prim
,
89 const struct _mesa_index_buffer
*ib
,
90 GLuint
*min_index
, GLuint
*max_index
,
93 const GLboolean restart
= ctx
->Array
.PrimitiveRestart
;
94 const GLuint restartIndex
= ctx
->Array
.RestartIndex
;
95 const int index_size
= vbo_sizeof_ib_type(ib
->type
);
99 indices
= (char *) ib
->ptr
+ prim
->start
* index_size
;
100 if (_mesa_is_bufferobj(ib
->obj
)) {
101 GLsizeiptr size
= MIN2(count
* index_size
, ib
->obj
->Size
);
102 indices
= ctx
->Driver
.MapBufferRange(ctx
, (GLintptr
) indices
, size
,
103 GL_MAP_READ_BIT
, ib
->obj
);
107 case GL_UNSIGNED_INT
: {
108 const GLuint
*ui_indices
= (const GLuint
*)indices
;
112 for (i
= 0; i
< count
; i
++) {
113 if (ui_indices
[i
] != restartIndex
) {
114 if (ui_indices
[i
] > max_ui
) max_ui
= ui_indices
[i
];
115 if (ui_indices
[i
] < min_ui
) min_ui
= ui_indices
[i
];
120 for (i
= 0; i
< count
; i
++) {
121 if (ui_indices
[i
] > max_ui
) max_ui
= ui_indices
[i
];
122 if (ui_indices
[i
] < min_ui
) min_ui
= ui_indices
[i
];
129 case GL_UNSIGNED_SHORT
: {
130 const GLushort
*us_indices
= (const GLushort
*)indices
;
134 for (i
= 0; i
< count
; i
++) {
135 if (us_indices
[i
] != restartIndex
) {
136 if (us_indices
[i
] > max_us
) max_us
= us_indices
[i
];
137 if (us_indices
[i
] < min_us
) min_us
= us_indices
[i
];
142 for (i
= 0; i
< count
; i
++) {
143 if (us_indices
[i
] > max_us
) max_us
= us_indices
[i
];
144 if (us_indices
[i
] < min_us
) min_us
= us_indices
[i
];
151 case GL_UNSIGNED_BYTE
: {
152 const GLubyte
*ub_indices
= (const GLubyte
*)indices
;
156 for (i
= 0; i
< count
; i
++) {
157 if (ub_indices
[i
] != restartIndex
) {
158 if (ub_indices
[i
] > max_ub
) max_ub
= ub_indices
[i
];
159 if (ub_indices
[i
] < min_ub
) min_ub
= ub_indices
[i
];
164 for (i
= 0; i
< count
; i
++) {
165 if (ub_indices
[i
] > max_ub
) max_ub
= ub_indices
[i
];
166 if (ub_indices
[i
] < min_ub
) min_ub
= ub_indices
[i
];
178 if (_mesa_is_bufferobj(ib
->obj
)) {
179 ctx
->Driver
.UnmapBuffer(ctx
, ib
->obj
);
184 * Compute min and max elements for nr_prims
187 vbo_get_minmax_indices(struct gl_context
*ctx
,
188 const struct _mesa_prim
*prims
,
189 const struct _mesa_index_buffer
*ib
,
194 GLuint tmp_min
, tmp_max
;
201 for (i
= 0; i
< nr_prims
; i
++) {
202 const struct _mesa_prim
*start_prim
;
204 start_prim
= &prims
[i
];
205 count
= start_prim
->count
;
206 /* Do combination if possible to reduce map/unmap count */
207 while ((i
+ 1 < nr_prims
) &&
208 (prims
[i
].start
+ prims
[i
].count
== prims
[i
+1].start
)) {
209 count
+= prims
[i
+1].count
;
212 vbo_get_minmax_index(ctx
, start_prim
, ib
, &tmp_min
, &tmp_max
, count
);
213 *min_index
= MIN2(*min_index
, tmp_min
);
214 *max_index
= MAX2(*max_index
, tmp_max
);
220 * Check that element 'j' of the array has reasonable data.
222 * For debugging purposes; not normally used.
225 check_array_data(struct gl_context
*ctx
, struct gl_client_array
*array
,
226 GLuint attrib
, GLuint j
)
228 if (array
->Enabled
) {
229 const void *data
= array
->Ptr
;
230 if (_mesa_is_bufferobj(array
->BufferObj
)) {
231 if (!array
->BufferObj
->Pointer
) {
232 /* need to map now */
233 array
->BufferObj
->Pointer
=
234 ctx
->Driver
.MapBufferRange(ctx
, 0, array
->BufferObj
->Size
,
235 GL_MAP_READ_BIT
, array
->BufferObj
);
237 data
= ADD_POINTERS(data
, array
->BufferObj
->Pointer
);
239 switch (array
->Type
) {
242 GLfloat
*f
= (GLfloat
*) ((GLubyte
*) data
+ array
->StrideB
* j
);
244 for (k
= 0; k
< array
->Size
; k
++) {
245 if (IS_INF_OR_NAN(f
[k
]) ||
246 f
[k
] >= 1.0e20
|| f
[k
] <= -1.0e10
) {
247 printf("Bad array data:\n");
248 printf(" Element[%u].%u = %f\n", j
, k
, f
[k
]);
249 printf(" Array %u at %p\n", attrib
, (void* ) array
);
250 printf(" Type 0x%x, Size %d, Stride %d\n",
251 array
->Type
, array
->Size
, array
->Stride
);
252 printf(" Address/offset %p in Buffer Object %u\n",
253 array
->Ptr
, array
->BufferObj
->Name
);
254 f
[k
] = 1.0; /* XXX replace the bad value! */
256 /*assert(!IS_INF_OR_NAN(f[k]));*/
268 * Unmap the buffer object referenced by given array, if mapped.
271 unmap_array_buffer(struct gl_context
*ctx
, struct gl_client_array
*array
)
273 if (array
->Enabled
&&
274 _mesa_is_bufferobj(array
->BufferObj
) &&
275 _mesa_bufferobj_mapped(array
->BufferObj
)) {
276 ctx
->Driver
.UnmapBuffer(ctx
, array
->BufferObj
);
282 * Examine the array's data for NaNs, etc.
283 * For debug purposes; not normally used.
286 check_draw_elements_data(struct gl_context
*ctx
, GLsizei count
, GLenum elemType
,
287 const void *elements
, GLint basevertex
)
289 struct gl_array_object
*arrayObj
= ctx
->Array
.ArrayObj
;
293 if (_mesa_is_bufferobj(ctx
->Array
.ArrayObj
->ElementArrayBufferObj
)) {
294 elemMap
= ctx
->Driver
.MapBufferRange(ctx
, 0,
295 ctx
->Array
.ArrayObj
->ElementArrayBufferObj
->Size
,
297 ctx
->Array
.ArrayObj
->ElementArrayBufferObj
);
298 elements
= ADD_POINTERS(elements
, elemMap
);
301 for (i
= 0; i
< count
; i
++) {
306 case GL_UNSIGNED_BYTE
:
307 j
= ((const GLubyte
*) elements
)[i
];
309 case GL_UNSIGNED_SHORT
:
310 j
= ((const GLushort
*) elements
)[i
];
312 case GL_UNSIGNED_INT
:
313 j
= ((const GLuint
*) elements
)[i
];
319 /* check element j of each enabled array */
320 for (k
= 0; k
< Elements(arrayObj
->VertexAttrib
); k
++) {
321 check_array_data(ctx
, &arrayObj
->VertexAttrib
[k
], k
, j
);
325 if (_mesa_is_bufferobj(arrayObj
->ElementArrayBufferObj
)) {
326 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Array
.ArrayObj
->ElementArrayBufferObj
);
329 for (k
= 0; k
< Elements(arrayObj
->VertexAttrib
); k
++) {
330 unmap_array_buffer(ctx
, &arrayObj
->VertexAttrib
[k
]);
336 * Check array data, looking for NaNs, etc.
339 check_draw_arrays_data(struct gl_context
*ctx
, GLint start
, GLsizei count
)
346 * Print info/data for glDrawArrays(), for debugging.
349 print_draw_arrays(struct gl_context
*ctx
,
350 GLenum mode
, GLint start
, GLsizei count
)
352 struct vbo_context
*vbo
= vbo_context(ctx
);
353 struct vbo_exec_context
*exec
= &vbo
->exec
;
354 struct gl_array_object
*arrayObj
= ctx
->Array
.ArrayObj
;
357 printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
360 for (i
= 0; i
< 32; i
++) {
361 struct gl_buffer_object
*bufObj
= exec
->array
.inputs
[i
]->BufferObj
;
362 GLuint bufName
= bufObj
->Name
;
363 GLint stride
= exec
->array
.inputs
[i
]->Stride
;
364 printf("attr %2d: size %d stride %d enabled %d "
365 "ptr %p Bufobj %u\n",
367 exec
->array
.inputs
[i
]->Size
,
369 /*exec->array.inputs[i]->Enabled,*/
370 arrayObj
->VertexAttrib
[VERT_ATTRIB_FF(i
)].Enabled
,
371 exec
->array
.inputs
[i
]->Ptr
,
375 GLubyte
*p
= ctx
->Driver
.MapBufferRange(ctx
, 0, bufObj
->Size
,
376 GL_MAP_READ_BIT
, bufObj
);
377 int offset
= (int) (GLintptr
) exec
->array
.inputs
[i
]->Ptr
;
378 float *f
= (float *) (p
+ offset
);
381 int n
= (count
* stride
) / 4;
384 printf(" Data at offset %d:\n", offset
);
385 for (i
= 0; i
< n
; i
++) {
386 printf(" float[%d] = 0x%08x %f\n", i
, k
[i
], f
[i
]);
388 ctx
->Driver
.UnmapBuffer(ctx
, bufObj
);
395 * Set the vbo->exec->inputs[] pointers to point to the enabled
396 * vertex arrays. This depends on the current vertex program/shader
397 * being executed because of whether or not generic vertex arrays
398 * alias the conventional vertex arrays.
399 * For arrays that aren't enabled, we set the input[attrib] pointer
400 * to point at a zero-stride current value "array".
403 recalculate_input_bindings(struct gl_context
*ctx
)
405 struct vbo_context
*vbo
= vbo_context(ctx
);
406 struct vbo_exec_context
*exec
= &vbo
->exec
;
407 struct gl_client_array
*vertexAttrib
= ctx
->Array
.ArrayObj
->VertexAttrib
;
408 const struct gl_client_array
**inputs
= &exec
->array
.inputs
[0];
409 GLbitfield64 const_inputs
= 0x0;
412 switch (get_program_mode(ctx
)) {
414 /* When no vertex program is active (or the vertex program is generated
415 * from fixed-function state). We put the material values into the
416 * generic slots. This is the only situation where material values
417 * are available as per-vertex attributes.
419 for (i
= 0; i
< VERT_ATTRIB_FF_MAX
; i
++) {
420 if (vertexAttrib
[VERT_ATTRIB_FF(i
)].Enabled
)
421 inputs
[i
] = &vertexAttrib
[VERT_ATTRIB_FF(i
)];
423 inputs
[i
] = &vbo
->currval
[VBO_ATTRIB_POS
+i
];
424 const_inputs
|= VERT_BIT(i
);
428 for (i
= 0; i
< MAT_ATTRIB_MAX
; i
++) {
429 inputs
[VERT_ATTRIB_GENERIC(i
)] =
430 &vbo
->currval
[VBO_ATTRIB_MAT_FRONT_AMBIENT
+i
];
431 const_inputs
|= VERT_BIT_GENERIC(i
);
434 /* Could use just about anything, just to fill in the empty
437 for (i
= MAT_ATTRIB_MAX
; i
< VERT_ATTRIB_GENERIC_MAX
; i
++) {
438 inputs
[VERT_ATTRIB_GENERIC(i
)] = &vbo
->currval
[VBO_ATTRIB_GENERIC0
+i
];
439 const_inputs
|= VERT_BIT_GENERIC(i
);
444 /* NV_vertex_program - attribute arrays alias and override
445 * conventional, legacy arrays. No materials, and the generic
448 for (i
= 0; i
< VERT_ATTRIB_FF_MAX
; i
++) {
449 if (i
< VERT_ATTRIB_GENERIC_MAX
450 && vertexAttrib
[VERT_ATTRIB_GENERIC(i
)].Enabled
)
451 inputs
[i
] = &vertexAttrib
[VERT_ATTRIB_GENERIC(i
)];
452 else if (vertexAttrib
[VERT_ATTRIB_FF(i
)].Enabled
)
453 inputs
[i
] = &vertexAttrib
[VERT_ATTRIB_FF(i
)];
455 inputs
[i
] = &vbo
->currval
[VBO_ATTRIB_POS
+i
];
456 const_inputs
|= VERT_BIT_FF(i
);
460 /* Could use just about anything, just to fill in the empty
463 for (i
= 0; i
< VERT_ATTRIB_GENERIC_MAX
; i
++) {
464 inputs
[VERT_ATTRIB_GENERIC(i
)] = &vbo
->currval
[VBO_ATTRIB_GENERIC0
+i
];
465 const_inputs
|= VERT_BIT_GENERIC(i
);
470 /* GL_ARB_vertex_program or GLSL vertex shader - Only the generic[0]
471 * attribute array aliases and overrides the legacy position array.
473 * Otherwise, legacy attributes available in the legacy slots,
474 * generic attributes in the generic slots and materials are not
475 * available as per-vertex attributes.
477 if (vertexAttrib
[VERT_ATTRIB_GENERIC0
].Enabled
)
478 inputs
[0] = &vertexAttrib
[VERT_ATTRIB_GENERIC0
];
479 else if (vertexAttrib
[VERT_ATTRIB_POS
].Enabled
)
480 inputs
[0] = &vertexAttrib
[VERT_ATTRIB_POS
];
482 inputs
[0] = &vbo
->currval
[VBO_ATTRIB_POS
];
483 const_inputs
|= VERT_BIT_POS
;
486 for (i
= 1; i
< VERT_ATTRIB_FF_MAX
; i
++) {
487 if (vertexAttrib
[VERT_ATTRIB_FF(i
)].Enabled
)
488 inputs
[i
] = &vertexAttrib
[VERT_ATTRIB_FF(i
)];
490 inputs
[i
] = &vbo
->currval
[VBO_ATTRIB_POS
+i
];
491 const_inputs
|= VERT_BIT_FF(i
);
495 for (i
= 1; i
< VERT_ATTRIB_GENERIC_MAX
; i
++) {
496 if (vertexAttrib
[VERT_ATTRIB_GENERIC(i
)].Enabled
)
497 inputs
[VERT_ATTRIB_GENERIC(i
)] = &vertexAttrib
[VERT_ATTRIB_GENERIC(i
)];
499 inputs
[VERT_ATTRIB_GENERIC(i
)] = &vbo
->currval
[VBO_ATTRIB_GENERIC0
+i
];
500 const_inputs
|= VERT_BIT_GENERIC(i
);
504 inputs
[VERT_ATTRIB_GENERIC0
] = inputs
[0];
508 _mesa_set_varying_vp_inputs( ctx
, VERT_BIT_ALL
& (~const_inputs
) );
509 ctx
->Driver
.UpdateState(ctx
, _NEW_ARRAY
);
514 * Examine the enabled vertex arrays to set the exec->array.inputs[] values.
515 * These will point to the arrays to actually use for drawing. Some will
516 * be user-provided arrays, other will be zero-stride const-valued arrays.
517 * Note that this might set the _NEW_VARYING_VP_INPUTS dirty flag so state
518 * validation must be done after this call.
521 vbo_bind_arrays(struct gl_context
*ctx
)
523 struct vbo_context
*vbo
= vbo_context(ctx
);
524 struct vbo_exec_context
*exec
= &vbo
->exec
;
526 vbo_draw_method(exec
, DRAW_ARRAYS
);
528 if (exec
->array
.recalculate_inputs
) {
529 recalculate_input_bindings(ctx
);
531 /* Again... because we may have changed the bitmask of per-vertex varying
532 * attributes. If we regenerate the fixed-function vertex program now
533 * we may be able to prune down the number of vertex attributes which we
534 * need in the shader.
537 _mesa_update_state(ctx
);
540 exec
->array
.recalculate_inputs
= GL_FALSE
;
546 * Helper function called by the other DrawArrays() functions below.
547 * This is where we handle primitive restart for drawing non-indexed
548 * arrays. If primitive restart is enabled, it typically means
549 * splitting one DrawArrays() into two.
552 vbo_draw_arrays(struct gl_context
*ctx
, GLenum mode
, GLint start
,
553 GLsizei count
, GLuint numInstances
)
555 struct vbo_context
*vbo
= vbo_context(ctx
);
556 struct vbo_exec_context
*exec
= &vbo
->exec
;
557 struct _mesa_prim prim
[2];
559 vbo_bind_arrays(ctx
);
561 /* init most fields to zero */
562 memset(prim
, 0, sizeof(prim
));
566 prim
[0].num_instances
= numInstances
;
568 /* Implement the primitive restart index */
569 if (ctx
->Array
.PrimitiveRestart
&& ctx
->Array
.RestartIndex
< count
) {
570 GLuint primCount
= 0;
572 if (ctx
->Array
.RestartIndex
== start
) {
573 /* special case: RestartIndex at beginning */
575 prim
[0].start
= start
+ 1;
576 prim
[0].count
= count
- 1;
580 else if (ctx
->Array
.RestartIndex
== start
+ count
- 1) {
581 /* special case: RestartIndex at end */
583 prim
[0].start
= start
;
584 prim
[0].count
= count
- 1;
589 /* general case: RestartIndex in middle, split into two prims */
590 prim
[0].start
= start
;
591 prim
[0].count
= ctx
->Array
.RestartIndex
- start
;
594 prim
[1].start
= ctx
->Array
.RestartIndex
+ 1;
595 prim
[1].count
= count
- prim
[1].start
;
601 /* draw one or two prims */
602 check_buffers_are_unmapped(exec
->array
.inputs
);
603 vbo
->draw_prims(ctx
, exec
->array
.inputs
, prim
, primCount
, NULL
,
604 GL_TRUE
, start
, start
+ count
- 1, NULL
);
608 /* no prim restart */
609 prim
[0].start
= start
;
610 prim
[0].count
= count
;
612 check_buffers_are_unmapped(exec
->array
.inputs
);
613 vbo
->draw_prims(ctx
, exec
->array
.inputs
, prim
, 1, NULL
,
614 GL_TRUE
, start
, start
+ count
- 1,
622 * Called from glDrawArrays when in immediate mode (not display list mode).
624 static void GLAPIENTRY
625 vbo_exec_DrawArrays(GLenum mode
, GLint start
, GLsizei count
)
627 GET_CURRENT_CONTEXT(ctx
);
629 if (MESA_VERBOSE
& VERBOSE_DRAW
)
630 _mesa_debug(ctx
, "glDrawArrays(%s, %d, %d)\n",
631 _mesa_lookup_enum_by_nr(mode
), start
, count
);
633 FLUSH_CURRENT(ctx
, 0);
635 if (!_mesa_validate_DrawArrays( ctx
, mode
, start
, count
))
639 check_draw_arrays_data(ctx
, start
, count
);
641 vbo_draw_arrays(ctx
, mode
, start
, count
, 1);
644 print_draw_arrays(ctx
, mode
, start
, count
);
649 * Called from glDrawArraysInstanced when in immediate mode (not
650 * display list mode).
652 static void GLAPIENTRY
653 vbo_exec_DrawArraysInstanced(GLenum mode
, GLint start
, GLsizei count
,
654 GLsizei numInstances
)
656 GET_CURRENT_CONTEXT(ctx
);
658 if (MESA_VERBOSE
& VERBOSE_DRAW
)
659 _mesa_debug(ctx
, "glDrawArraysInstanced(%s, %d, %d, %d)\n",
660 _mesa_lookup_enum_by_nr(mode
), start
, count
, numInstances
);
662 FLUSH_CURRENT(ctx
, 0);
664 if (!_mesa_validate_DrawArraysInstanced(ctx
, mode
, start
, count
, numInstances
))
668 check_draw_arrays_data(ctx
, start
, count
);
670 vbo_draw_arrays(ctx
, mode
, start
, count
, numInstances
);
673 print_draw_arrays(ctx
, mode
, start
, count
);
678 * Map GL_ELEMENT_ARRAY_BUFFER and print contents.
683 dump_element_buffer(struct gl_context
*ctx
, GLenum type
)
686 ctx
->Driver
.MapBufferRange(ctx
, 0,
687 ctx
->Array
.ArrayObj
->ElementArrayBufferObj
->Size
,
689 ctx
->Array
.ArrayObj
->ElementArrayBufferObj
);
691 case GL_UNSIGNED_BYTE
:
693 const GLubyte
*us
= (const GLubyte
*) map
;
695 for (i
= 0; i
< ctx
->Array
.ArrayObj
->ElementArrayBufferObj
->Size
; i
++) {
696 printf("%02x ", us
[i
]);
703 case GL_UNSIGNED_SHORT
:
705 const GLushort
*us
= (const GLushort
*) map
;
707 for (i
= 0; i
< ctx
->Array
.ArrayObj
->ElementArrayBufferObj
->Size
/ 2; i
++) {
708 printf("%04x ", us
[i
]);
715 case GL_UNSIGNED_INT
:
717 const GLuint
*us
= (const GLuint
*) map
;
719 for (i
= 0; i
< ctx
->Array
.ArrayObj
->ElementArrayBufferObj
->Size
/ 4; i
++) {
720 printf("%08x ", us
[i
]);
731 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Array
.ArrayObj
->ElementArrayBufferObj
);
737 * Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements.
738 * Do the rendering for a glDrawElements or glDrawRangeElements call after
739 * we've validated buffer bounds, etc.
742 vbo_validated_drawrangeelements(struct gl_context
*ctx
, GLenum mode
,
743 GLboolean index_bounds_valid
,
744 GLuint start
, GLuint end
,
745 GLsizei count
, GLenum type
,
746 const GLvoid
*indices
,
747 GLint basevertex
, GLint numInstances
)
749 struct vbo_context
*vbo
= vbo_context(ctx
);
750 struct vbo_exec_context
*exec
= &vbo
->exec
;
751 struct _mesa_index_buffer ib
;
752 struct _mesa_prim prim
[1];
754 vbo_bind_arrays(ctx
);
758 ib
.obj
= ctx
->Array
.ArrayObj
->ElementArrayBufferObj
;
767 prim
[0].count
= count
;
769 prim
[0].basevertex
= basevertex
;
770 prim
[0].num_instances
= numInstances
;
772 /* Need to give special consideration to rendering a range of
773 * indices starting somewhere above zero. Typically the
774 * application is issuing multiple DrawRangeElements() to draw
775 * successive primitives layed out linearly in the vertex arrays.
776 * Unless the vertex arrays are all in a VBO (or locked as with
777 * CVA), the OpenGL semantics imply that we need to re-read or
778 * re-upload the vertex data on each draw call.
780 * In the case of hardware tnl, we want to avoid starting the
781 * upload at zero, as it will mean every draw call uploads an
782 * increasing amount of not-used vertex data. Worse - in the
783 * software tnl module, all those vertices might be transformed and
784 * lit but never rendered.
786 * If we just upload or transform the vertices in start..end,
787 * however, the indices will be incorrect.
789 * At this level, we don't know exactly what the requirements of
790 * the backend are going to be, though it will likely boil down to
793 * 1) Do nothing, everything is in a VBO and is processed once
796 * 2) Adjust the indices and vertex arrays so that start becomes
799 * Rather than doing anything here, I'll provide a helper function
800 * for the latter case elsewhere.
803 check_buffers_are_unmapped(exec
->array
.inputs
);
804 vbo
->draw_prims( ctx
, exec
->array
.inputs
, prim
, 1, &ib
,
805 index_bounds_valid
, start
, end
, NULL
);
810 * Called by glDrawRangeElementsBaseVertex() in immediate mode.
812 static void GLAPIENTRY
813 vbo_exec_DrawRangeElementsBaseVertex(GLenum mode
,
814 GLuint start
, GLuint end
,
815 GLsizei count
, GLenum type
,
816 const GLvoid
*indices
,
819 static GLuint warnCount
= 0;
820 GLboolean index_bounds_valid
= GL_TRUE
;
821 GET_CURRENT_CONTEXT(ctx
);
823 if (MESA_VERBOSE
& VERBOSE_DRAW
)
825 "glDrawRangeElementsBaseVertex(%s, %u, %u, %d, %s, %p, %d)\n",
826 _mesa_lookup_enum_by_nr(mode
), start
, end
, count
,
827 _mesa_lookup_enum_by_nr(type
), indices
, basevertex
);
829 FLUSH_CURRENT(ctx
, 0);
831 if (!_mesa_validate_DrawRangeElements( ctx
, mode
, start
, end
, count
,
832 type
, indices
, basevertex
))
835 if ((int) end
+ basevertex
< 0 ||
836 start
+ basevertex
>= ctx
->Array
.ArrayObj
->_MaxElement
) {
837 /* The application requested we draw using a range of indices that's
838 * outside the bounds of the current VBO. This is invalid and appears
839 * to give undefined results. The safest thing to do is to simply
840 * ignore the range, in case the application botched their range tracking
841 * but did provide valid indices. Also issue a warning indicating that
842 * the application is broken.
844 if (warnCount
++ < 10) {
845 _mesa_warning(ctx
, "glDrawRangeElements(start %u, end %u, "
846 "basevertex %d, count %d, type 0x%x, indices=%p):\n"
847 "\trange is outside VBO bounds (max=%u); ignoring.\n"
848 "\tThis should be fixed in the application.",
849 start
, end
, basevertex
, count
, type
, indices
,
850 ctx
->Array
.ArrayObj
->_MaxElement
- 1);
852 index_bounds_valid
= GL_FALSE
;
855 /* NOTE: It's important that 'end' is a reasonable value.
856 * in _tnl_draw_prims(), we use end to determine how many vertices
857 * to transform. If it's too large, we can unnecessarily split prims
858 * or we can read/write out of memory in several different places!
861 /* Catch/fix some potential user errors */
862 if (type
== GL_UNSIGNED_BYTE
) {
863 start
= MIN2(start
, 0xff);
864 end
= MIN2(end
, 0xff);
866 else if (type
== GL_UNSIGNED_SHORT
) {
867 start
= MIN2(start
, 0xffff);
868 end
= MIN2(end
, 0xffff);
872 printf("glDraw[Range]Elements{,BaseVertex}"
873 "(start %u, end %u, type 0x%x, count %d) ElemBuf %u, "
875 start
, end
, type
, count
,
876 ctx
->Array
.ArrayObj
->ElementArrayBufferObj
->Name
,
880 if ((int) start
+ basevertex
< 0 ||
881 end
+ basevertex
>= ctx
->Array
.ArrayObj
->_MaxElement
)
882 index_bounds_valid
= GL_FALSE
;
885 check_draw_elements_data(ctx
, count
, type
, indices
);
887 (void) check_draw_elements_data
;
890 vbo_validated_drawrangeelements(ctx
, mode
, index_bounds_valid
, start
, end
,
891 count
, type
, indices
, basevertex
, 1);
896 * Called by glDrawRangeElements() in immediate mode.
898 static void GLAPIENTRY
899 vbo_exec_DrawRangeElements(GLenum mode
, GLuint start
, GLuint end
,
900 GLsizei count
, GLenum type
, const GLvoid
*indices
)
902 if (MESA_VERBOSE
& VERBOSE_DRAW
) {
903 GET_CURRENT_CONTEXT(ctx
);
905 "glDrawRangeElements(%s, %u, %u, %d, %s, %p)\n",
906 _mesa_lookup_enum_by_nr(mode
), start
, end
, count
,
907 _mesa_lookup_enum_by_nr(type
), indices
);
910 vbo_exec_DrawRangeElementsBaseVertex(mode
, start
, end
, count
, type
,
916 * Called by glDrawElements() in immediate mode.
918 static void GLAPIENTRY
919 vbo_exec_DrawElements(GLenum mode
, GLsizei count
, GLenum type
,
920 const GLvoid
*indices
)
922 GET_CURRENT_CONTEXT(ctx
);
924 if (MESA_VERBOSE
& VERBOSE_DRAW
)
925 _mesa_debug(ctx
, "glDrawElements(%s, %u, %s, %p)\n",
926 _mesa_lookup_enum_by_nr(mode
), count
,
927 _mesa_lookup_enum_by_nr(type
), indices
);
929 FLUSH_CURRENT(ctx
, 0);
931 if (!_mesa_validate_DrawElements( ctx
, mode
, count
, type
, indices
, 0 ))
934 vbo_validated_drawrangeelements(ctx
, mode
, GL_FALSE
, ~0, ~0,
935 count
, type
, indices
, 0, 1);
940 * Called by glDrawElementsBaseVertex() in immediate mode.
942 static void GLAPIENTRY
943 vbo_exec_DrawElementsBaseVertex(GLenum mode
, GLsizei count
, GLenum type
,
944 const GLvoid
*indices
, GLint basevertex
)
946 GET_CURRENT_CONTEXT(ctx
);
948 if (MESA_VERBOSE
& VERBOSE_DRAW
)
949 _mesa_debug(ctx
, "glDrawElementsBaseVertex(%s, %d, %s, %p, %d)\n",
950 _mesa_lookup_enum_by_nr(mode
), count
,
951 _mesa_lookup_enum_by_nr(type
), indices
, basevertex
);
953 FLUSH_CURRENT(ctx
, 0);
955 if (!_mesa_validate_DrawElements( ctx
, mode
, count
, type
, indices
,
959 vbo_validated_drawrangeelements(ctx
, mode
, GL_FALSE
, ~0, ~0,
960 count
, type
, indices
, basevertex
, 1);
965 * Called by glDrawElementsInstanced() in immediate mode.
967 static void GLAPIENTRY
968 vbo_exec_DrawElementsInstanced(GLenum mode
, GLsizei count
, GLenum type
,
969 const GLvoid
*indices
, GLsizei numInstances
)
971 GET_CURRENT_CONTEXT(ctx
);
973 if (MESA_VERBOSE
& VERBOSE_DRAW
)
974 _mesa_debug(ctx
, "glDrawElementsInstanced(%s, %d, %s, %p, %d)\n",
975 _mesa_lookup_enum_by_nr(mode
), count
,
976 _mesa_lookup_enum_by_nr(type
), indices
, numInstances
);
978 FLUSH_CURRENT(ctx
, 0);
980 if (!_mesa_validate_DrawElementsInstanced(ctx
, mode
, count
, type
, indices
,
984 vbo_validated_drawrangeelements(ctx
, mode
, GL_FALSE
, ~0, ~0,
985 count
, type
, indices
, 0, numInstances
);
989 * Called by glDrawElementsInstancedBaseVertex() in immediate mode.
991 static void GLAPIENTRY
992 vbo_exec_DrawElementsInstancedBaseVertex(GLenum mode
, GLsizei count
, GLenum type
,
993 const GLvoid
*indices
, GLsizei numInstances
,
996 GET_CURRENT_CONTEXT(ctx
);
998 if (MESA_VERBOSE
& VERBOSE_DRAW
)
999 _mesa_debug(ctx
, "glDrawElementsInstancedBaseVertex(%s, %d, %s, %p, %d; %d)\n",
1000 _mesa_lookup_enum_by_nr(mode
), count
,
1001 _mesa_lookup_enum_by_nr(type
), indices
,
1002 numInstances
, basevertex
);
1004 FLUSH_CURRENT(ctx
, 0);
1006 if (!_mesa_validate_DrawElementsInstanced(ctx
, mode
, count
, type
, indices
,
1007 numInstances
, basevertex
))
1010 vbo_validated_drawrangeelements(ctx
, mode
, GL_FALSE
, ~0, ~0,
1011 count
, type
, indices
, basevertex
, numInstances
);
1016 * Inner support for both _mesa_MultiDrawElements() and
1017 * _mesa_MultiDrawRangeElements().
1018 * This does the actual rendering after we've checked array indexes, etc.
1021 vbo_validated_multidrawelements(struct gl_context
*ctx
, GLenum mode
,
1022 const GLsizei
*count
, GLenum type
,
1023 const GLvoid
**indices
, GLsizei primcount
,
1024 const GLint
*basevertex
)
1026 struct vbo_context
*vbo
= vbo_context(ctx
);
1027 struct vbo_exec_context
*exec
= &vbo
->exec
;
1028 struct _mesa_index_buffer ib
;
1029 struct _mesa_prim
*prim
;
1030 unsigned int index_type_size
= vbo_sizeof_ib_type(type
);
1031 uintptr_t min_index_ptr
, max_index_ptr
;
1032 GLboolean fallback
= GL_FALSE
;
1038 prim
= calloc(1, primcount
* sizeof(*prim
));
1040 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glMultiDrawElements");
1044 vbo_bind_arrays(ctx
);
1046 min_index_ptr
= (uintptr_t)indices
[0];
1048 for (i
= 0; i
< primcount
; i
++) {
1049 min_index_ptr
= MIN2(min_index_ptr
, (uintptr_t)indices
[i
]);
1050 max_index_ptr
= MAX2(max_index_ptr
, (uintptr_t)indices
[i
] +
1051 index_type_size
* count
[i
]);
1054 /* Check if we can handle this thing as a bunch of index offsets from the
1055 * same index pointer. If we can't, then we have to fall back to doing
1056 * a draw_prims per primitive.
1057 * Check that the difference between each prim's indexes is a multiple of
1058 * the index/element size.
1060 if (index_type_size
!= 1) {
1061 for (i
= 0; i
< primcount
; i
++) {
1062 if ((((uintptr_t)indices
[i
] - min_index_ptr
) % index_type_size
) != 0) {
1069 /* If the index buffer isn't in a VBO, then treating the application's
1070 * subranges of the index buffer as one large index buffer may lead to
1071 * us reading unmapped memory.
1073 if (!_mesa_is_bufferobj(ctx
->Array
.ArrayObj
->ElementArrayBufferObj
))
1077 ib
.count
= (max_index_ptr
- min_index_ptr
) / index_type_size
;
1079 ib
.obj
= ctx
->Array
.ArrayObj
->ElementArrayBufferObj
;
1080 ib
.ptr
= (void *)min_index_ptr
;
1082 for (i
= 0; i
< primcount
; i
++) {
1083 prim
[i
].begin
= (i
== 0);
1084 prim
[i
].end
= (i
== primcount
- 1);
1087 prim
[i
].mode
= mode
;
1088 prim
[i
].start
= ((uintptr_t)indices
[i
] - min_index_ptr
) / index_type_size
;
1089 prim
[i
].count
= count
[i
];
1090 prim
[i
].indexed
= 1;
1091 prim
[i
].num_instances
= 1;
1092 if (basevertex
!= NULL
)
1093 prim
[i
].basevertex
= basevertex
[i
];
1095 prim
[i
].basevertex
= 0;
1098 check_buffers_are_unmapped(exec
->array
.inputs
);
1099 vbo
->draw_prims(ctx
, exec
->array
.inputs
, prim
, primcount
, &ib
,
1100 GL_FALSE
, ~0, ~0, NULL
);
1102 /* render one prim at a time */
1103 for (i
= 0; i
< primcount
; i
++) {
1104 ib
.count
= count
[i
];
1106 ib
.obj
= ctx
->Array
.ArrayObj
->ElementArrayBufferObj
;
1107 ib
.ptr
= indices
[i
];
1113 prim
[0].mode
= mode
;
1115 prim
[0].count
= count
[i
];
1116 prim
[0].indexed
= 1;
1117 prim
[0].num_instances
= 1;
1118 if (basevertex
!= NULL
)
1119 prim
[0].basevertex
= basevertex
[i
];
1121 prim
[0].basevertex
= 0;
1123 check_buffers_are_unmapped(exec
->array
.inputs
);
1124 vbo
->draw_prims(ctx
, exec
->array
.inputs
, prim
, 1, &ib
,
1125 GL_FALSE
, ~0, ~0, NULL
);
1133 static void GLAPIENTRY
1134 vbo_exec_MultiDrawElements(GLenum mode
,
1135 const GLsizei
*count
, GLenum type
,
1136 const GLvoid
**indices
,
1139 GET_CURRENT_CONTEXT(ctx
);
1142 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1144 for (i
= 0; i
< primcount
; i
++) {
1145 if (!_mesa_validate_DrawElements(ctx
, mode
, count
[i
], type
, indices
[i
],
1150 vbo_validated_multidrawelements(ctx
, mode
, count
, type
, indices
, primcount
,
1155 static void GLAPIENTRY
1156 vbo_exec_MultiDrawElementsBaseVertex(GLenum mode
,
1157 const GLsizei
*count
, GLenum type
,
1158 const GLvoid
**indices
,
1160 const GLsizei
*basevertex
)
1162 GET_CURRENT_CONTEXT(ctx
);
1165 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
1167 for (i
= 0; i
< primcount
; i
++) {
1168 if (!_mesa_validate_DrawElements(ctx
, mode
, count
[i
], type
, indices
[i
],
1173 vbo_validated_multidrawelements(ctx
, mode
, count
, type
, indices
, primcount
,
1177 #if FEATURE_EXT_transform_feedback
1180 vbo_draw_transform_feedback(struct gl_context
*ctx
, GLenum mode
,
1181 struct gl_transform_feedback_object
*obj
,
1182 GLuint numInstances
)
1184 struct vbo_context
*vbo
= vbo_context(ctx
);
1185 struct vbo_exec_context
*exec
= &vbo
->exec
;
1186 struct _mesa_prim prim
[2];
1188 vbo_bind_arrays(ctx
);
1190 /* init most fields to zero */
1191 memset(prim
, 0, sizeof(prim
));
1194 prim
[0].mode
= mode
;
1195 prim
[0].num_instances
= numInstances
;
1197 /* Maybe we should do some primitive splitting for primitive restart
1198 * (like in DrawArrays), but we have no way to know how many vertices
1199 * will be rendered. */
1201 check_buffers_are_unmapped(exec
->array
.inputs
);
1202 vbo
->draw_prims(ctx
, exec
->array
.inputs
, prim
, 1, NULL
,
1203 GL_TRUE
, 0, 0, obj
);
1207 * Like DrawArrays, but take the count from a transform feedback object.
1208 * \param mode GL_POINTS, GL_LINES, GL_TRIANGLE_STRIP, etc.
1209 * \param name the transform feedback object
1210 * User still has to setup of the vertex attribute info with
1211 * glVertexPointer, glColorPointer, etc.
1212 * Part of GL_ARB_transform_feedback2.
1214 static void GLAPIENTRY
1215 vbo_exec_DrawTransformFeedback(GLenum mode
, GLuint name
)
1217 GET_CURRENT_CONTEXT(ctx
);
1218 struct gl_transform_feedback_object
*obj
=
1219 _mesa_lookup_transform_feedback_object(ctx
, name
);
1221 if (MESA_VERBOSE
& VERBOSE_DRAW
)
1222 _mesa_debug(ctx
, "glDrawTransformFeedback(%s, %d)\n",
1223 _mesa_lookup_enum_by_nr(mode
), name
);
1225 FLUSH_CURRENT(ctx
, 0);
1227 if (!_mesa_validate_DrawTransformFeedback(ctx
, mode
, obj
)) {
1231 vbo_draw_transform_feedback(ctx
, mode
, obj
, 1);
1237 * Plug in the immediate-mode vertex array drawing commands into the
1238 * givven vbo_exec_context object.
1241 vbo_exec_array_init( struct vbo_exec_context
*exec
)
1243 exec
->vtxfmt
.DrawArrays
= vbo_exec_DrawArrays
;
1244 exec
->vtxfmt
.DrawElements
= vbo_exec_DrawElements
;
1245 exec
->vtxfmt
.DrawRangeElements
= vbo_exec_DrawRangeElements
;
1246 exec
->vtxfmt
.MultiDrawElementsEXT
= vbo_exec_MultiDrawElements
;
1247 exec
->vtxfmt
.DrawElementsBaseVertex
= vbo_exec_DrawElementsBaseVertex
;
1248 exec
->vtxfmt
.DrawRangeElementsBaseVertex
= vbo_exec_DrawRangeElementsBaseVertex
;
1249 exec
->vtxfmt
.MultiDrawElementsBaseVertex
= vbo_exec_MultiDrawElementsBaseVertex
;
1250 exec
->vtxfmt
.DrawArraysInstanced
= vbo_exec_DrawArraysInstanced
;
1251 exec
->vtxfmt
.DrawElementsInstanced
= vbo_exec_DrawElementsInstanced
;
1252 exec
->vtxfmt
.DrawElementsInstancedBaseVertex
= vbo_exec_DrawElementsInstancedBaseVertex
;
1253 #if FEATURE_EXT_transform_feedback
1254 exec
->vtxfmt
.DrawTransformFeedback
= vbo_exec_DrawTransformFeedback
;
1260 vbo_exec_array_destroy( struct vbo_exec_context
*exec
)
1268 * The following functions are only used for OpenGL ES 1/2 support.
1269 * And some aren't even supported (yet) in ES 1/2.
1274 _mesa_DrawArrays(GLenum mode
, GLint first
, GLsizei count
)
1276 vbo_exec_DrawArrays(mode
, first
, count
);
1281 _mesa_DrawElements(GLenum mode
, GLsizei count
, GLenum type
,
1282 const GLvoid
*indices
)
1284 vbo_exec_DrawElements(mode
, count
, type
, indices
);
1289 _mesa_DrawElementsBaseVertex(GLenum mode
, GLsizei count
, GLenum type
,
1290 const GLvoid
*indices
, GLint basevertex
)
1292 vbo_exec_DrawElementsBaseVertex(mode
, count
, type
, indices
, basevertex
);
1297 _mesa_DrawRangeElements(GLenum mode
, GLuint start
, GLuint end
, GLsizei count
,
1298 GLenum type
, const GLvoid
*indices
)
1300 vbo_exec_DrawRangeElements(mode
, start
, end
, count
, type
, indices
);
1305 _mesa_DrawRangeElementsBaseVertex(GLenum mode
, GLuint start
, GLuint end
,
1306 GLsizei count
, GLenum type
,
1307 const GLvoid
*indices
, GLint basevertex
)
1309 vbo_exec_DrawRangeElementsBaseVertex(mode
, start
, end
, count
, type
,
1310 indices
, basevertex
);
1315 _mesa_MultiDrawElementsEXT(GLenum mode
, const GLsizei
*count
, GLenum type
,
1316 const GLvoid
**indices
, GLsizei primcount
)
1318 vbo_exec_MultiDrawElements(mode
, count
, type
, indices
, primcount
);
1323 _mesa_MultiDrawElementsBaseVertex(GLenum mode
,
1324 const GLsizei
*count
, GLenum type
,
1325 const GLvoid
**indices
, GLsizei primcount
,
1326 const GLint
*basevertex
)
1328 vbo_exec_MultiDrawElementsBaseVertex(mode
, count
, type
, indices
,
1329 primcount
, basevertex
);
1332 #if FEATURE_EXT_transform_feedback
1335 _mesa_DrawTransformFeedback(GLenum mode
, GLuint name
)
1337 vbo_exec_DrawTransformFeedback(mode
, name
);