2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2005 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>
28 #include "main/mtypes.h"
29 #include "main/bufferobj.h"
30 #include "math/m_eval.h"
31 #include "main/vtxfmt.h"
32 #include "main/api_arrayelt.h"
33 #include "main/arrayobj.h"
34 #include "main/varray.h"
36 #include "vbo_private.h"
40 check_size(const GLfloat
*attr
)
53 * Helper for initializing a vertex array.
56 init_array(struct gl_context
*ctx
, struct gl_array_attributes
*attrib
,
57 unsigned size
, const void *pointer
)
59 memset(attrib
, 0, sizeof(*attrib
));
62 attrib
->Type
= GL_FLOAT
;
63 attrib
->Format
= GL_RGBA
;
65 attrib
->_ElementSize
= size
* sizeof(GLfloat
);
66 attrib
->Ptr
= pointer
;
71 * Set up the vbo->currval arrays to point at the context's current
72 * vertex attributes (with strides = 0).
75 init_legacy_currval(struct gl_context
*ctx
)
77 struct vbo_context
*vbo
= vbo_context(ctx
);
80 /* Set up a constant (Stride == 0) array for each current
83 for (i
= 0; i
< VERT_ATTRIB_FF_MAX
; i
++) {
84 const unsigned attr
= VERT_ATTRIB_FF(i
);
85 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
87 init_array(ctx
, attrib
, check_size(ctx
->Current
.Attrib
[attr
]),
88 ctx
->Current
.Attrib
[attr
]);
94 init_generic_currval(struct gl_context
*ctx
)
96 struct vbo_context
*vbo
= vbo_context(ctx
);
99 for (i
= 0; i
< VERT_ATTRIB_GENERIC_MAX
; i
++) {
100 const unsigned attr
= VBO_ATTRIB_GENERIC0
+ i
;
101 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
103 init_array(ctx
, attrib
, 1, ctx
->Current
.Attrib
[attr
]);
109 init_mat_currval(struct gl_context
*ctx
)
111 struct vbo_context
*vbo
= vbo_context(ctx
);
114 /* Set up a constant (StrideB == 0) array for each current
117 for (i
= 0; i
< MAT_ATTRIB_MAX
; i
++) {
118 const unsigned attr
= VBO_ATTRIB_MAT_FRONT_AMBIENT
+ i
;
119 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
122 /* Size is fixed for the material attributes, for others will
123 * be determined at runtime:
126 case MAT_ATTRIB_FRONT_SHININESS
:
127 case MAT_ATTRIB_BACK_SHININESS
:
130 case MAT_ATTRIB_FRONT_INDEXES
:
131 case MAT_ATTRIB_BACK_INDEXES
:
139 init_array(ctx
, attrib
, size
, ctx
->Light
.Material
.Attrib
[i
]);
145 _vbo_install_exec_vtxfmt(struct gl_context
*ctx
)
147 struct vbo_context
*vbo
= vbo_context(ctx
);
149 _mesa_install_exec_vtxfmt(ctx
, &vbo
->exec
.vtxfmt
);
154 vbo_exec_invalidate_state(struct gl_context
*ctx
)
156 struct vbo_context
*vbo
= vbo_context(ctx
);
157 struct vbo_exec_context
*exec
= &vbo
->exec
;
159 if (ctx
->NewState
& (_NEW_PROGRAM
| _NEW_ARRAY
)) {
160 _ae_invalidate_state(ctx
);
162 if (ctx
->NewState
& _NEW_EVAL
)
163 exec
->eval
.recalculate_maps
= GL_TRUE
;
168 _vbo_CreateContext(struct gl_context
*ctx
)
170 struct vbo_context
*vbo
= CALLOC_STRUCT(vbo_context
);
172 ctx
->vbo_context
= vbo
;
174 /* Initialize the arrayelt helper
176 if (!ctx
->aelt_context
&&
177 !_ae_create_context(ctx
)) {
181 vbo
->binding
.Offset
= 0;
182 vbo
->binding
.Stride
= 0;
183 vbo
->binding
.InstanceDivisor
= 0;
184 _mesa_reference_buffer_object(ctx
, &vbo
->binding
.BufferObj
,
185 ctx
->Shared
->NullBufferObj
);
186 init_legacy_currval(ctx
);
187 init_generic_currval(ctx
);
188 init_mat_currval(ctx
);
190 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
191 STATIC_ASSERT(VBO_ATTRIB_MAX
<= 255);
193 /* Hook our functions into exec and compile dispatch tables. These
194 * will pretty much be permanently installed, which means that the
195 * vtxfmt mechanism can be removed now.
198 if (ctx
->API
== API_OPENGL_COMPAT
)
201 vbo
->VAO
= _mesa_new_vao(ctx
, ~((GLuint
)0));
202 /* The exec VAO assumes to have all arributes bound to binding 0 */
203 for (unsigned i
= 0; i
< VERT_ATTRIB_MAX
; ++i
)
204 _mesa_vertex_attrib_binding(ctx
, vbo
->VAO
, i
, 0, false);
213 _vbo_DestroyContext(struct gl_context
*ctx
)
215 struct vbo_context
*vbo
= vbo_context(ctx
);
217 if (ctx
->aelt_context
) {
218 _ae_destroy_context(ctx
);
219 ctx
->aelt_context
= NULL
;
224 _mesa_reference_buffer_object(ctx
, &vbo
->binding
.BufferObj
, NULL
);
226 vbo_exec_destroy(ctx
);
227 if (ctx
->API
== API_OPENGL_COMPAT
)
228 vbo_save_destroy(ctx
);
229 _mesa_reference_vao(ctx
, &vbo
->VAO
, NULL
);
231 ctx
->vbo_context
= NULL
;
237 * Helper function for _vbo_draw_indirect below that additionally takes a zero
238 * initialized array of _mesa_prim scratch space memory as the last argument.
241 draw_indirect(struct gl_context
*ctx
, GLuint mode
,
242 struct gl_buffer_object
*indirect_data
,
243 GLsizeiptr indirect_offset
, unsigned draw_count
,
245 struct gl_buffer_object
*indirect_draw_count_buffer
,
246 GLsizeiptr indirect_draw_count_offset
,
247 const struct _mesa_index_buffer
*ib
,
248 struct _mesa_prim
*prim
)
251 prim
[draw_count
- 1].end
= 1;
252 for (unsigned i
= 0; i
< draw_count
; ++i
, indirect_offset
+= stride
) {
254 prim
[i
].indexed
= !!ib
;
255 prim
[i
].indirect_offset
= indirect_offset
;
256 prim
[i
].is_indirect
= 1;
260 /* This should always be true at this time */
261 assert(indirect_data
== ctx
->DrawIndirectBuffer
);
263 ctx
->Driver
.Draw(ctx
, prim
, draw_count
, ib
, false, 0u, ~0u,
264 NULL
, 0, indirect_data
);
269 * Function to be put into dd_function_table::DrawIndirect as fallback.
270 * Calls into dd_function_table::Draw past adapting call arguments.
271 * See dd_function_table::DrawIndirect for call argument documentation.
274 _vbo_draw_indirect(struct gl_context
*ctx
, GLuint mode
,
275 struct gl_buffer_object
*indirect_data
,
276 GLsizeiptr indirect_offset
, unsigned draw_count
,
278 struct gl_buffer_object
*indirect_draw_count_buffer
,
279 GLsizeiptr indirect_draw_count_offset
,
280 const struct _mesa_index_buffer
*ib
)
282 /* Use alloca for the prim space if we are somehow in bounds. */
283 if (draw_count
*sizeof(struct _mesa_prim
) < 1024) {
284 struct _mesa_prim
*space
= alloca(draw_count
*sizeof(struct _mesa_prim
));
285 memset(space
, 0, draw_count
*sizeof(struct _mesa_prim
));
287 draw_indirect(ctx
, mode
, indirect_data
, indirect_offset
, draw_count
,
288 stride
, indirect_draw_count_buffer
,
289 indirect_draw_count_offset
, ib
, space
);
291 struct _mesa_prim
*space
= calloc(draw_count
, sizeof(struct _mesa_prim
));
293 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "gl%sDraw%sIndirect%s",
294 (draw_count
> 1) ? "Multi" : "",
295 ib
? "Elements" : "Arrays",
296 indirect_data
? "CountARB" : "");
300 draw_indirect(ctx
, mode
, indirect_data
, indirect_offset
, draw_count
,
301 stride
, indirect_draw_count_buffer
,
302 indirect_draw_count_offset
, ib
, space
);