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"
35 #include "util/u_memory.h"
37 #include "vbo_private.h"
41 check_size(const GLfloat
*attr
)
54 * Helper for initializing a vertex array.
57 init_array(struct gl_context
*ctx
, struct gl_array_attributes
*attrib
,
58 unsigned size
, const void *pointer
)
60 memset(attrib
, 0, sizeof(*attrib
));
62 vbo_set_vertex_format(&attrib
->Format
, size
, GL_FLOAT
);
64 attrib
->Ptr
= pointer
;
69 * Set up the vbo->currval arrays to point at the context's current
70 * vertex attributes (with strides = 0).
73 init_legacy_currval(struct gl_context
*ctx
)
75 struct vbo_context
*vbo
= vbo_context(ctx
);
78 /* Set up a constant (Stride == 0) array for each current
81 for (i
= 0; i
< VERT_ATTRIB_FF_MAX
; i
++) {
82 const unsigned attr
= VERT_ATTRIB_FF(i
);
83 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
85 init_array(ctx
, attrib
, check_size(ctx
->Current
.Attrib
[attr
]),
86 ctx
->Current
.Attrib
[attr
]);
92 init_generic_currval(struct gl_context
*ctx
)
94 struct vbo_context
*vbo
= vbo_context(ctx
);
97 for (i
= 0; i
< VERT_ATTRIB_GENERIC_MAX
; i
++) {
98 const unsigned attr
= VBO_ATTRIB_GENERIC0
+ i
;
99 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
101 init_array(ctx
, attrib
, 1, ctx
->Current
.Attrib
[attr
]);
107 init_mat_currval(struct gl_context
*ctx
)
109 struct vbo_context
*vbo
= vbo_context(ctx
);
112 /* Set up a constant (StrideB == 0) array for each current
115 for (i
= 0; i
< MAT_ATTRIB_MAX
; i
++) {
116 const unsigned attr
= VBO_ATTRIB_MAT_FRONT_AMBIENT
+ i
;
117 struct gl_array_attributes
*attrib
= &vbo
->current
[attr
];
120 /* Size is fixed for the material attributes, for others will
121 * be determined at runtime:
124 case MAT_ATTRIB_FRONT_SHININESS
:
125 case MAT_ATTRIB_BACK_SHININESS
:
128 case MAT_ATTRIB_FRONT_INDEXES
:
129 case MAT_ATTRIB_BACK_INDEXES
:
137 init_array(ctx
, attrib
, size
, ctx
->Light
.Material
.Attrib
[i
]);
143 _vbo_install_exec_vtxfmt(struct gl_context
*ctx
)
145 struct vbo_context
*vbo
= vbo_context(ctx
);
147 _mesa_install_exec_vtxfmt(ctx
, &vbo
->exec
.vtxfmt
);
152 vbo_exec_update_eval_maps(struct gl_context
*ctx
)
154 struct vbo_context
*vbo
= vbo_context(ctx
);
156 vbo
->exec
.eval
.recalculate_maps
= GL_TRUE
;
161 _vbo_CreateContext(struct gl_context
*ctx
, bool use_buffer_objects
)
163 struct vbo_context
*vbo
= &ctx
->vbo_context
;
165 memset(vbo
, 0, sizeof(*vbo
));
167 vbo
->binding
.Offset
= 0;
168 vbo
->binding
.Stride
= 0;
169 vbo
->binding
.InstanceDivisor
= 0;
171 init_legacy_currval(ctx
);
172 init_generic_currval(ctx
);
173 init_mat_currval(ctx
);
175 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
176 STATIC_ASSERT(VBO_ATTRIB_MAX
<= 255);
178 /* Hook our functions into exec and compile dispatch tables. These
179 * will pretty much be permanently installed, which means that the
180 * vtxfmt mechanism can be removed now.
182 vbo_exec_init(ctx
, use_buffer_objects
);
183 if (ctx
->API
== API_OPENGL_COMPAT
)
186 vbo
->VAO
= _mesa_new_vao(ctx
, ~((GLuint
)0));
187 /* The exec VAO assumes to have all arributes bound to binding 0 */
188 for (unsigned i
= 0; i
< VERT_ATTRIB_MAX
; ++i
)
189 _mesa_vertex_attrib_binding(ctx
, vbo
->VAO
, i
, 0);
198 _vbo_DestroyContext(struct gl_context
*ctx
)
200 struct vbo_context
*vbo
= vbo_context(ctx
);
203 _mesa_reference_buffer_object(ctx
, &vbo
->binding
.BufferObj
, NULL
);
205 vbo_exec_destroy(ctx
);
206 if (ctx
->API
== API_OPENGL_COMPAT
)
207 vbo_save_destroy(ctx
);
208 _mesa_reference_vao(ctx
, &vbo
->VAO
, NULL
);
213 const struct gl_array_attributes
*
214 _vbo_current_attrib(const struct gl_context
*ctx
, gl_vert_attrib attr
)
216 const struct vbo_context
*vbo
= vbo_context_const(ctx
);
217 const gl_vertex_processing_mode vmp
= ctx
->VertexProgram
._VPMode
;
218 return &vbo
->current
[_vbo_attribute_alias_map
[vmp
][attr
]];
222 const struct gl_vertex_buffer_binding
*
223 _vbo_current_binding(const struct gl_context
*ctx
)
225 const struct vbo_context
*vbo
= vbo_context_const(ctx
);
226 return &vbo
->binding
;