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/errors.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
));
61 vbo_set_vertex_format(&attrib
->Format
, size
, GL_FLOAT
);
63 attrib
->Ptr
= pointer
;
68 * Set up the vbo->currval arrays to point at the context's current
69 * vertex attributes (with strides = 0).
72 init_legacy_currval(struct gl_context
*ctx
)
74 struct vbo_context
*vbo
= vbo_context(ctx
);
77 /* Set up a constant (Stride == 0) array for each current
80 for (i
= 0; i
< VERT_ATTRIB_FF_MAX
; i
++) {
81 const unsigned attr
= VERT_ATTRIB_FF(i
);
82 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
84 init_array(ctx
, attrib
, check_size(ctx
->Current
.Attrib
[attr
]),
85 ctx
->Current
.Attrib
[attr
]);
91 init_generic_currval(struct gl_context
*ctx
)
93 struct vbo_context
*vbo
= vbo_context(ctx
);
96 for (i
= 0; i
< VERT_ATTRIB_GENERIC_MAX
; i
++) {
97 const unsigned attr
= VBO_ATTRIB_GENERIC0
+ i
;
98 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
100 init_array(ctx
, attrib
, 1, ctx
->Current
.Attrib
[attr
]);
106 init_mat_currval(struct gl_context
*ctx
)
108 struct vbo_context
*vbo
= vbo_context(ctx
);
111 /* Set up a constant (StrideB == 0) array for each current
114 for (i
= 0; i
< MAT_ATTRIB_MAX
; i
++) {
115 const unsigned attr
= VBO_ATTRIB_MAT_FRONT_AMBIENT
+ i
;
116 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
119 /* Size is fixed for the material attributes, for others will
120 * be determined at runtime:
123 case MAT_ATTRIB_FRONT_SHININESS
:
124 case MAT_ATTRIB_BACK_SHININESS
:
127 case MAT_ATTRIB_FRONT_INDEXES
:
128 case MAT_ATTRIB_BACK_INDEXES
:
136 init_array(ctx
, attrib
, size
, ctx
->Light
.Material
.Attrib
[i
]);
142 _vbo_install_exec_vtxfmt(struct gl_context
*ctx
)
144 struct vbo_context
*vbo
= vbo_context(ctx
);
146 _mesa_install_exec_vtxfmt(ctx
, &vbo
->exec
.vtxfmt
);
151 vbo_exec_invalidate_state(struct gl_context
*ctx
)
153 struct vbo_context
*vbo
= vbo_context(ctx
);
154 struct vbo_exec_context
*exec
= &vbo
->exec
;
156 if (ctx
->NewState
& _NEW_ARRAY
) {
157 _ae_invalidate_state(ctx
);
159 if (ctx
->NewState
& _NEW_EVAL
)
160 exec
->eval
.recalculate_maps
= GL_TRUE
;
165 _vbo_CreateContext(struct gl_context
*ctx
)
167 struct vbo_context
*vbo
= CALLOC_STRUCT(vbo_context
);
169 ctx
->vbo_context
= vbo
;
171 /* Initialize the arrayelt helper
173 if (!ctx
->aelt_context
&&
174 !_ae_create_context(ctx
)) {
178 vbo
->binding
.Offset
= 0;
179 vbo
->binding
.Stride
= 0;
180 vbo
->binding
.InstanceDivisor
= 0;
181 _mesa_reference_buffer_object(ctx
, &vbo
->binding
.BufferObj
,
182 ctx
->Shared
->NullBufferObj
);
183 init_legacy_currval(ctx
);
184 init_generic_currval(ctx
);
185 init_mat_currval(ctx
);
187 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
188 STATIC_ASSERT(VBO_ATTRIB_MAX
<= 255);
190 /* Hook our functions into exec and compile dispatch tables. These
191 * will pretty much be permanently installed, which means that the
192 * vtxfmt mechanism can be removed now.
195 if (ctx
->API
== API_OPENGL_COMPAT
)
198 vbo
->VAO
= _mesa_new_vao(ctx
, ~((GLuint
)0));
199 /* The exec VAO assumes to have all arributes bound to binding 0 */
200 for (unsigned i
= 0; i
< VERT_ATTRIB_MAX
; ++i
)
201 _mesa_vertex_attrib_binding(ctx
, vbo
->VAO
, i
, 0);
210 _vbo_DestroyContext(struct gl_context
*ctx
)
212 struct vbo_context
*vbo
= vbo_context(ctx
);
214 if (ctx
->aelt_context
) {
215 _ae_destroy_context(ctx
);
216 ctx
->aelt_context
= NULL
;
221 _mesa_reference_buffer_object(ctx
, &vbo
->binding
.BufferObj
, NULL
);
223 vbo_exec_destroy(ctx
);
224 if (ctx
->API
== API_OPENGL_COMPAT
)
225 vbo_save_destroy(ctx
);
226 _mesa_reference_vao(ctx
, &vbo
->VAO
, NULL
);
228 ctx
->vbo_context
= NULL
;
233 const struct gl_array_attributes
*
234 _vbo_current_attrib(const struct gl_context
*ctx
, gl_vert_attrib attr
)
236 const struct vbo_context
*vbo
= vbo_context_const(ctx
);
237 const gl_vertex_processing_mode vmp
= ctx
->VertexProgram
._VPMode
;
238 return &vbo
->current
[_vbo_attribute_alias_map
[vmp
][attr
]];
242 const struct gl_vertex_buffer_binding
*
243 _vbo_current_binding(const struct gl_context
*ctx
)
245 const struct vbo_context
*vbo
= vbo_context_const(ctx
);
246 return &vbo
->binding
;