2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keithw@vmware.com>
30 #include "main/arrayobj.h"
31 #include "main/glheader.h"
32 #include "main/bufferobj.h"
33 #include "main/context.h"
34 #include "main/enums.h"
35 #include "main/state.h"
36 #include "main/varray.h"
37 #include "main/vtxfmt.h"
40 #include "vbo_private.h"
44 vbo_exec_debug_verts(struct vbo_exec_context
*exec
)
46 GLuint count
= exec
->vtx
.vert_count
;
49 printf("%s: %u vertices %d primitives, %d vertsize\n",
53 exec
->vtx
.vertex_size
);
55 for (i
= 0 ; i
< exec
->vtx
.prim_count
; i
++) {
56 struct _mesa_prim
*prim
= &exec
->vtx
.prim
[i
];
57 printf(" prim %d: %s %d..%d %s %s\n",
59 _mesa_lookup_prim_by_nr(prim
->mode
),
61 prim
->start
+ prim
->count
,
62 prim
->begin
? "BEGIN" : "(wrap)",
63 prim
->end
? "END" : "(wrap)");
69 * Copy zero, one or two vertices from the current vertex buffer into
70 * the temporary "copy" buffer.
71 * This is used when a single primitive overflows a vertex buffer and
72 * we need to continue the primitive in a new vertex buffer.
73 * The temporary "copy" buffer holds the vertices which need to get
74 * copied from the old buffer to the new one.
77 vbo_copy_vertices(struct vbo_exec_context
*exec
)
79 struct _mesa_prim
*last_prim
= &exec
->vtx
.prim
[exec
->vtx
.prim_count
- 1];
80 const GLuint nr
= last_prim
->count
;
82 const GLuint sz
= exec
->vtx
.vertex_size
;
83 fi_type
*dst
= exec
->vtx
.copied
.buffer
;
84 const fi_type
*src
= exec
->vtx
.buffer_map
+ last_prim
->start
* sz
;
86 switch (exec
->ctx
->Driver
.CurrentExecPrimitive
) {
91 for (i
= 0 ; i
< ovf
; i
++)
92 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
96 for (i
= 0 ; i
< ovf
; i
++)
97 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
101 for (i
= 0 ; i
< ovf
; i
++)
102 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
109 memcpy(dst
, src
+(nr
-1)*sz
, sz
* sizeof(GLfloat
));
113 if (last_prim
->begin
== 0) {
114 /* We're dealing with the second or later section of a split/wrapped
115 * GL_LINE_LOOP. Since we're converting line loops to line strips,
116 * we've already increment the last_prim->start counter by one to
117 * skip the 0th vertex in the loop. We need to undo that (effectively
118 * subtract one from last_prim->start) so that we copy the 0th vertex
119 * to the next vertex buffer.
121 assert(last_prim
->start
> 0);
125 case GL_TRIANGLE_FAN
:
131 memcpy(dst
, src
+0, sz
* sizeof(GLfloat
));
135 memcpy(dst
, src
+0, sz
* sizeof(GLfloat
));
136 memcpy(dst
+sz
, src
+(nr
-1)*sz
, sz
* sizeof(GLfloat
));
139 case GL_TRIANGLE_STRIP
:
140 /* no parity issue, but need to make sure the tri is not drawn twice */
157 for (i
= 0 ; i
< ovf
; i
++)
158 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
160 case PRIM_OUTSIDE_BEGIN_END
:
163 unreachable("Unexpected primitive type");
170 /* TODO: populate these as the vertex is defined:
173 vbo_exec_bind_arrays(struct gl_context
*ctx
)
175 struct vbo_context
*vbo
= vbo_context(ctx
);
176 struct gl_vertex_array_object
*vao
= vbo
->VAO
;
177 struct vbo_exec_context
*exec
= &vbo
->exec
;
179 GLintptr buffer_offset
;
180 if (_mesa_is_bufferobj(exec
->vtx
.bufferobj
)) {
181 assert(exec
->vtx
.bufferobj
->Mappings
[MAP_INTERNAL
].Pointer
);
182 buffer_offset
= exec
->vtx
.bufferobj
->Mappings
[MAP_INTERNAL
].Offset
+
183 exec
->vtx
.buffer_offset
;
185 /* Ptr into ordinary app memory */
186 buffer_offset
= (GLbyte
*)exec
->vtx
.buffer_map
- (GLbyte
*)NULL
;
189 const gl_vertex_processing_mode mode
= ctx
->VertexProgram
._VPMode
;
191 /* Compute the bitmasks of vao_enabled arrays */
192 GLbitfield vao_enabled
= _vbo_get_vao_enabled_from_vbo(mode
, exec
->vtx
.enabled
);
194 /* At first disable arrays no longer needed */
195 _mesa_disable_vertex_array_attribs(ctx
, vao
, VERT_BIT_ALL
& ~vao_enabled
);
196 assert((~vao_enabled
& vao
->Enabled
) == 0);
198 /* Bind the buffer object */
199 const GLuint stride
= exec
->vtx
.vertex_size
*sizeof(GLfloat
);
200 _mesa_bind_vertex_buffer(ctx
, vao
, 0, exec
->vtx
.bufferobj
, buffer_offset
,
203 /* Retrieve the mapping from VBO_ATTRIB to VERT_ATTRIB space
204 * Note that the position/generic0 aliasing is done in the VAO.
206 const GLubyte
*const vao_to_vbo_map
= _vbo_attribute_alias_map
[mode
];
207 /* Now set the enabled arrays */
208 GLbitfield mask
= vao_enabled
;
210 const int vao_attr
= u_bit_scan(&mask
);
211 const GLubyte vbo_attr
= vao_to_vbo_map
[vao_attr
];
213 const GLubyte size
= exec
->vtx
.attr
[vbo_attr
].size
;
214 const GLenum16 type
= exec
->vtx
.attr
[vbo_attr
].type
;
215 const GLuint offset
= (GLuint
)((GLbyte
*)exec
->vtx
.attrptr
[vbo_attr
] -
216 (GLbyte
*)exec
->vtx
.vertex
);
217 assert(offset
<= ctx
->Const
.MaxVertexAttribRelativeOffset
);
220 _vbo_set_attrib_format(ctx
, vao
, vao_attr
, buffer_offset
,
223 /* The vao is initially created with all bindings set to 0. */
224 assert(vao
->VertexAttrib
[vao_attr
].BufferBindingIndex
== 0);
226 _mesa_enable_vertex_array_attribs(ctx
, vao
, vao_enabled
);
227 assert(vao_enabled
== vao
->Enabled
);
228 assert(!_mesa_is_bufferobj(exec
->vtx
.bufferobj
) ||
229 (vao_enabled
& ~vao
->VertexAttribBufferMask
) == 0);
231 _mesa_set_draw_vao(ctx
, vao
, _vbo_get_vao_filter(mode
));
236 * Unmap the VBO. This is called before drawing.
239 vbo_exec_vtx_unmap(struct vbo_exec_context
*exec
)
241 if (_mesa_is_bufferobj(exec
->vtx
.bufferobj
)) {
242 struct gl_context
*ctx
= exec
->ctx
;
244 if (ctx
->Driver
.FlushMappedBufferRange
&&
245 !ctx
->Extensions
.ARB_buffer_storage
) {
246 GLintptr offset
= exec
->vtx
.buffer_used
-
247 exec
->vtx
.bufferobj
->Mappings
[MAP_INTERNAL
].Offset
;
248 GLsizeiptr length
= (exec
->vtx
.buffer_ptr
- exec
->vtx
.buffer_map
) *
252 ctx
->Driver
.FlushMappedBufferRange(ctx
, offset
, length
,
257 exec
->vtx
.buffer_used
+= (exec
->vtx
.buffer_ptr
-
258 exec
->vtx
.buffer_map
) * sizeof(float);
260 assert(exec
->vtx
.buffer_used
<= VBO_VERT_BUFFER_SIZE
);
261 assert(exec
->vtx
.buffer_ptr
!= NULL
);
263 ctx
->Driver
.UnmapBuffer(ctx
, exec
->vtx
.bufferobj
, MAP_INTERNAL
);
264 exec
->vtx
.buffer_map
= NULL
;
265 exec
->vtx
.buffer_ptr
= NULL
;
266 exec
->vtx
.max_vert
= 0;
271 vbo_exec_buffer_has_space(struct vbo_exec_context
*exec
)
273 return VBO_VERT_BUFFER_SIZE
> exec
->vtx
.buffer_used
+ 1024;
278 * Map the vertex buffer to begin storing glVertex, glColor, etc data.
281 vbo_exec_vtx_map(struct vbo_exec_context
*exec
)
283 struct gl_context
*ctx
= exec
->ctx
;
284 const GLenum usage
= GL_STREAM_DRAW_ARB
;
285 GLenum accessRange
= GL_MAP_WRITE_BIT
| /* for MapBufferRange */
286 GL_MAP_UNSYNCHRONIZED_BIT
;
288 if (ctx
->Extensions
.ARB_buffer_storage
) {
289 /* We sometimes read from the buffer, so map it for read too.
290 * Only the persistent mapping can do that, because the non-persistent
291 * mapping uses flags that are incompatible with GL_MAP_READ_BIT.
293 accessRange
|= GL_MAP_PERSISTENT_BIT
|
294 GL_MAP_COHERENT_BIT
|
297 accessRange
|= GL_MAP_INVALIDATE_RANGE_BIT
|
298 GL_MAP_FLUSH_EXPLICIT_BIT
|
302 if (!_mesa_is_bufferobj(exec
->vtx
.bufferobj
))
305 assert(!exec
->vtx
.buffer_map
);
306 assert(!exec
->vtx
.buffer_ptr
);
308 if (vbo_exec_buffer_has_space(exec
)) {
309 /* The VBO exists and there's room for more */
310 if (exec
->vtx
.bufferobj
->Size
> 0) {
311 exec
->vtx
.buffer_map
= (fi_type
*)
312 ctx
->Driver
.MapBufferRange(ctx
,
313 exec
->vtx
.buffer_used
,
315 - exec
->vtx
.buffer_used
,
319 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
;
322 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
= NULL
;
326 if (!exec
->vtx
.buffer_map
) {
327 /* Need to allocate a new VBO */
328 exec
->vtx
.buffer_used
= 0;
330 if (ctx
->Driver
.BufferData(ctx
, GL_ARRAY_BUFFER_ARB
,
331 VBO_VERT_BUFFER_SIZE
,
334 (ctx
->Extensions
.ARB_buffer_storage
?
335 GL_MAP_PERSISTENT_BIT
|
336 GL_MAP_COHERENT_BIT
|
337 GL_MAP_READ_BIT
: 0) |
338 GL_DYNAMIC_STORAGE_BIT
|
339 GL_CLIENT_STORAGE_BIT
,
340 exec
->vtx
.bufferobj
)) {
341 /* buffer allocation worked, now map the buffer */
342 exec
->vtx
.buffer_map
=
343 (fi_type
*)ctx
->Driver
.MapBufferRange(ctx
,
344 0, VBO_VERT_BUFFER_SIZE
,
350 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "VBO allocation");
351 exec
->vtx
.buffer_map
= NULL
;
355 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
;
356 exec
->vtx
.buffer_offset
= 0;
358 if (!exec
->vtx
.buffer_map
) {
360 _mesa_install_exec_vtxfmt(ctx
, &exec
->vtxfmt_noop
);
363 if (_mesa_using_noop_vtxfmt(ctx
->Exec
)) {
364 /* The no-op functions are installed so switch back to regular
365 * functions. We do this test just to avoid frequent and needless
366 * calls to _mesa_install_exec_vtxfmt().
368 _mesa_install_exec_vtxfmt(ctx
, &exec
->vtxfmt
);
373 printf("map %d..\n", exec
->vtx
.buffer_used
);
379 * Execute the buffer and save copied verts.
382 vbo_exec_vtx_flush(struct vbo_exec_context
*exec
)
384 /* Only unmap if persistent mappings are unsupported. */
385 bool persistent_mapping
= exec
->ctx
->Extensions
.ARB_buffer_storage
&&
386 _mesa_is_bufferobj(exec
->vtx
.bufferobj
) &&
387 exec
->vtx
.buffer_map
;
390 vbo_exec_debug_verts(exec
);
392 if (exec
->vtx
.prim_count
&&
393 exec
->vtx
.vert_count
) {
395 exec
->vtx
.copied
.nr
= vbo_copy_vertices(exec
);
397 if (exec
->vtx
.copied
.nr
!= exec
->vtx
.vert_count
) {
398 struct gl_context
*ctx
= exec
->ctx
;
400 /* Prepare and set the exec draws internal VAO for drawing. */
401 vbo_exec_bind_arrays(ctx
);
404 _mesa_update_state(ctx
);
406 if (!persistent_mapping
)
407 vbo_exec_vtx_unmap(exec
);
409 assert(ctx
->NewState
== 0);
412 printf("%s %d %d\n", __func__
, exec
->vtx
.prim_count
,
413 exec
->vtx
.vert_count
);
415 ctx
->Driver
.Draw(ctx
, exec
->vtx
.prim
, exec
->vtx
.prim_count
,
416 NULL
, GL_TRUE
, 0, exec
->vtx
.vert_count
- 1,
419 /* Get new storage -- unless asked not to. */
420 if (!persistent_mapping
)
421 vbo_exec_vtx_map(exec
);
425 if (persistent_mapping
) {
426 exec
->vtx
.buffer_used
+= (exec
->vtx
.buffer_ptr
- exec
->vtx
.buffer_map
) *
428 exec
->vtx
.buffer_map
= exec
->vtx
.buffer_ptr
;
430 /* Set the buffer offset for the next draw. */
431 exec
->vtx
.buffer_offset
= exec
->vtx
.buffer_used
;
433 if (!vbo_exec_buffer_has_space(exec
)) {
434 /* This will allocate a new buffer. */
435 vbo_exec_vtx_unmap(exec
);
436 vbo_exec_vtx_map(exec
);
440 if (exec
->vtx
.vertex_size
== 0)
441 exec
->vtx
.max_vert
= 0;
443 exec
->vtx
.max_vert
= vbo_compute_max_verts(exec
);
445 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
;
446 exec
->vtx
.prim_count
= 0;
447 exec
->vtx
.vert_count
= 0;