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%s %d..%d %s %s\n",
59 _mesa_lookup_prim_by_nr(prim
->mode
),
60 prim
->weak
? " (weak)" : "",
62 prim
->start
+ prim
->count
,
63 prim
->begin
? "BEGIN" : "(wrap)",
64 prim
->end
? "END" : "(wrap)");
70 * Copy zero, one or two vertices from the current vertex buffer into
71 * the temporary "copy" buffer.
72 * This is used when a single primitive overflows a vertex buffer and
73 * we need to continue the primitive in a new vertex buffer.
74 * The temporary "copy" buffer holds the vertices which need to get
75 * copied from the old buffer to the new one.
78 vbo_copy_vertices(struct vbo_exec_context
*exec
)
80 struct _mesa_prim
*last_prim
= &exec
->vtx
.prim
[exec
->vtx
.prim_count
- 1];
81 const GLuint nr
= last_prim
->count
;
83 const GLuint sz
= exec
->vtx
.vertex_size
;
84 fi_type
*dst
= exec
->vtx
.copied
.buffer
;
85 const fi_type
*src
= exec
->vtx
.buffer_map
+ last_prim
->start
* sz
;
87 switch (exec
->ctx
->Driver
.CurrentExecPrimitive
) {
92 for (i
= 0 ; i
< ovf
; i
++)
93 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
97 for (i
= 0 ; i
< ovf
; i
++)
98 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
102 for (i
= 0 ; i
< ovf
; i
++)
103 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
110 memcpy(dst
, src
+(nr
-1)*sz
, sz
* sizeof(GLfloat
));
114 if (last_prim
->begin
== 0) {
115 /* We're dealing with the second or later section of a split/wrapped
116 * GL_LINE_LOOP. Since we're converting line loops to line strips,
117 * we've already increment the last_prim->start counter by one to
118 * skip the 0th vertex in the loop. We need to undo that (effectively
119 * subtract one from last_prim->start) so that we copy the 0th vertex
120 * to the next vertex buffer.
122 assert(last_prim
->start
> 0);
126 case GL_TRIANGLE_FAN
:
132 memcpy(dst
, src
+0, sz
* sizeof(GLfloat
));
136 memcpy(dst
, src
+0, sz
* sizeof(GLfloat
));
137 memcpy(dst
+sz
, src
+(nr
-1)*sz
, sz
* sizeof(GLfloat
));
140 case GL_TRIANGLE_STRIP
:
141 /* no parity issue, but need to make sure the tri is not drawn twice */
158 for (i
= 0 ; i
< ovf
; i
++)
159 memcpy(dst
+i
*sz
, src
+(nr
-ovf
+i
)*sz
, sz
* sizeof(GLfloat
));
161 case PRIM_OUTSIDE_BEGIN_END
:
164 unreachable("Unexpected primitive type");
171 /* TODO: populate these as the vertex is defined:
174 vbo_exec_bind_arrays(struct gl_context
*ctx
)
176 struct vbo_context
*vbo
= vbo_context(ctx
);
177 struct gl_vertex_array_object
*vao
= vbo
->VAO
;
178 struct vbo_exec_context
*exec
= &vbo
->exec
;
180 GLintptr buffer_offset
;
181 if (_mesa_is_bufferobj(exec
->vtx
.bufferobj
)) {
182 assert(exec
->vtx
.bufferobj
->Mappings
[MAP_INTERNAL
].Pointer
);
183 buffer_offset
= exec
->vtx
.bufferobj
->Mappings
[MAP_INTERNAL
].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 GLbitfield mask
= vao
->_Enabled
& ~vao_enabled
;
197 const int vao_attr
= u_bit_scan(&mask
);
198 _mesa_disable_vertex_array_attrib(ctx
, vao
, vao_attr
, false);
200 assert((~vao_enabled
& vao
->_Enabled
) == 0);
202 /* Bind the buffer object */
203 _mesa_bind_vertex_buffer(ctx
, vao
, 0, exec
->vtx
.bufferobj
, buffer_offset
,
204 exec
->vtx
.vertex_size
*sizeof(GLfloat
), false);
206 /* Retrieve the mapping from VBO_ATTRIB to VERT_ATTRIB space
207 * Note that the position/generic0 aliasing is done in the VAO.
209 const GLubyte
*const vao_to_vbo_map
= _vbo_attribute_alias_map
[mode
];
210 /* Now set the enabled arrays */
213 const int vao_attr
= u_bit_scan(&mask
);
214 const GLubyte vbo_attr
= vao_to_vbo_map
[vao_attr
];
216 const GLubyte size
= exec
->vtx
.attrsz
[vbo_attr
];
217 const GLenum16 type
= exec
->vtx
.attrtype
[vbo_attr
];
218 const GLuint offset
= (GLuint
)((GLbyte
*)exec
->vtx
.attrptr
[vbo_attr
] -
219 (GLbyte
*)exec
->vtx
.vertex
);
222 _vbo_set_attrib_format(ctx
, vao
, vao_attr
, buffer_offset
,
224 if ((vao
->_Enabled
& VERT_BIT(vao_attr
)) == 0)
225 _mesa_enable_vertex_array_attrib(ctx
, vao
, vao_attr
, false);
227 /* The vao is initially created with all bindings set to 0. */
228 assert(vao
->VertexAttrib
[vao_attr
].BufferBindingIndex
== 0);
230 assert(vao_enabled
== vao
->_Enabled
);
231 assert(!_mesa_is_bufferobj(exec
->vtx
.bufferobj
) ||
232 (vao_enabled
& ~vao
->VertexAttribBufferMask
) == 0);
234 _mesa_set_draw_vao(ctx
, vao
, _vbo_get_vao_filter(mode
));
235 /* The exec VAO is not immutable, so we need to set manually */
236 ctx
->NewDriverState
|= ctx
->DriverFlags
.NewArray
;
238 /* Finally update the inputs array */
239 _vbo_update_inputs(ctx
, &vbo
->draw_arrays
);
244 * Unmap the VBO. This is called before drawing.
247 vbo_exec_vtx_unmap(struct vbo_exec_context
*exec
)
249 if (_mesa_is_bufferobj(exec
->vtx
.bufferobj
)) {
250 struct gl_context
*ctx
= exec
->ctx
;
252 if (ctx
->Driver
.FlushMappedBufferRange
) {
253 GLintptr offset
= exec
->vtx
.buffer_used
-
254 exec
->vtx
.bufferobj
->Mappings
[MAP_INTERNAL
].Offset
;
255 GLsizeiptr length
= (exec
->vtx
.buffer_ptr
- exec
->vtx
.buffer_map
) *
259 ctx
->Driver
.FlushMappedBufferRange(ctx
, offset
, length
,
264 exec
->vtx
.buffer_used
+= (exec
->vtx
.buffer_ptr
-
265 exec
->vtx
.buffer_map
) * sizeof(float);
267 assert(exec
->vtx
.buffer_used
<= VBO_VERT_BUFFER_SIZE
);
268 assert(exec
->vtx
.buffer_ptr
!= NULL
);
270 ctx
->Driver
.UnmapBuffer(ctx
, exec
->vtx
.bufferobj
, MAP_INTERNAL
);
271 exec
->vtx
.buffer_map
= NULL
;
272 exec
->vtx
.buffer_ptr
= NULL
;
273 exec
->vtx
.max_vert
= 0;
279 * Map the vertex buffer to begin storing glVertex, glColor, etc data.
282 vbo_exec_vtx_map(struct vbo_exec_context
*exec
)
284 struct gl_context
*ctx
= exec
->ctx
;
285 const GLenum accessRange
= GL_MAP_WRITE_BIT
| /* for MapBufferRange */
286 GL_MAP_INVALIDATE_RANGE_BIT
|
287 GL_MAP_UNSYNCHRONIZED_BIT
|
288 GL_MAP_FLUSH_EXPLICIT_BIT
|
290 const GLenum usage
= GL_STREAM_DRAW_ARB
;
292 if (!_mesa_is_bufferobj(exec
->vtx
.bufferobj
))
295 assert(!exec
->vtx
.buffer_map
);
296 assert(!exec
->vtx
.buffer_ptr
);
298 if (VBO_VERT_BUFFER_SIZE
> exec
->vtx
.buffer_used
+ 1024) {
299 /* The VBO exists and there's room for more */
300 if (exec
->vtx
.bufferobj
->Size
> 0) {
301 exec
->vtx
.buffer_map
= (fi_type
*)
302 ctx
->Driver
.MapBufferRange(ctx
,
303 exec
->vtx
.buffer_used
,
305 - exec
->vtx
.buffer_used
,
309 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
;
312 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
= NULL
;
316 if (!exec
->vtx
.buffer_map
) {
317 /* Need to allocate a new VBO */
318 exec
->vtx
.buffer_used
= 0;
320 if (ctx
->Driver
.BufferData(ctx
, GL_ARRAY_BUFFER_ARB
,
321 VBO_VERT_BUFFER_SIZE
,
324 GL_DYNAMIC_STORAGE_BIT
|
325 GL_CLIENT_STORAGE_BIT
,
326 exec
->vtx
.bufferobj
)) {
327 /* buffer allocation worked, now map the buffer */
328 exec
->vtx
.buffer_map
=
329 (fi_type
*)ctx
->Driver
.MapBufferRange(ctx
,
330 0, VBO_VERT_BUFFER_SIZE
,
336 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "VBO allocation");
337 exec
->vtx
.buffer_map
= NULL
;
341 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
;
343 if (!exec
->vtx
.buffer_map
) {
345 _mesa_install_exec_vtxfmt(ctx
, &exec
->vtxfmt_noop
);
348 if (_mesa_using_noop_vtxfmt(ctx
->Exec
)) {
349 /* The no-op functions are installed so switch back to regular
350 * functions. We do this test just to avoid frequent and needless
351 * calls to _mesa_install_exec_vtxfmt().
353 _mesa_install_exec_vtxfmt(ctx
, &exec
->vtxfmt
);
358 printf("map %d..\n", exec
->vtx
.buffer_used
);
364 * Execute the buffer and save copied verts.
365 * \param keep_unmapped if true, leave the VBO unmapped when we're done.
368 vbo_exec_vtx_flush(struct vbo_exec_context
*exec
, GLboolean keepUnmapped
)
371 vbo_exec_debug_verts(exec
);
373 if (exec
->vtx
.prim_count
&&
374 exec
->vtx
.vert_count
) {
376 exec
->vtx
.copied
.nr
= vbo_copy_vertices(exec
);
378 if (exec
->vtx
.copied
.nr
!= exec
->vtx
.vert_count
) {
379 struct gl_context
*ctx
= exec
->ctx
;
381 /* Before the update_state() as this may raise _NEW_VARYING_VP_INPUTS
382 * from _mesa_set_varying_vp_inputs().
384 vbo_exec_bind_arrays(ctx
);
387 _mesa_update_state(ctx
);
389 vbo_exec_vtx_unmap(exec
);
391 assert(ctx
->NewState
== 0);
394 printf("%s %d %d\n", __func__
, exec
->vtx
.prim_count
,
395 exec
->vtx
.vert_count
);
397 ctx
->Driver
.Draw(ctx
, exec
->vtx
.prim
, exec
->vtx
.prim_count
,
398 NULL
, GL_TRUE
, 0, exec
->vtx
.vert_count
- 1,
401 /* Get new storage -- unless asked not to. */
403 vbo_exec_vtx_map(exec
);
407 /* May have to unmap explicitly if we didn't draw:
409 if (keepUnmapped
&& exec
->vtx
.buffer_map
) {
410 vbo_exec_vtx_unmap(exec
);
413 if (keepUnmapped
|| exec
->vtx
.vertex_size
== 0)
414 exec
->vtx
.max_vert
= 0;
416 exec
->vtx
.max_vert
= vbo_compute_max_verts(exec
);
418 exec
->vtx
.buffer_ptr
= exec
->vtx
.buffer_map
;
419 exec
->vtx
.prim_count
= 0;
420 exec
->vtx
.vert_count
= 0;