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>
29 #include "main/glheader.h"
30 #include "main/arrayobj.h"
31 #include "main/api_arrayelt.h"
32 #include "main/vtxfmt.h"
33 #include "vbo_private.h"
36 _vbo_attribute_alias_map
[VP_MODE_MAX
][VERT_ATTRIB_MAX
] = {
39 VBO_ATTRIB_POS
, /* VERT_ATTRIB_POS */
40 VBO_ATTRIB_NORMAL
, /* VERT_ATTRIB_NORMAL */
41 VBO_ATTRIB_COLOR0
, /* VERT_ATTRIB_COLOR0 */
42 VBO_ATTRIB_COLOR1
, /* VERT_ATTRIB_COLOR1 */
43 VBO_ATTRIB_FOG
, /* VERT_ATTRIB_FOG */
44 VBO_ATTRIB_COLOR_INDEX
, /* VERT_ATTRIB_COLOR_INDEX */
45 VBO_ATTRIB_EDGEFLAG
, /* VERT_ATTRIB_EDGEFLAG */
46 VBO_ATTRIB_TEX0
, /* VERT_ATTRIB_TEX0 */
47 VBO_ATTRIB_TEX1
, /* VERT_ATTRIB_TEX1 */
48 VBO_ATTRIB_TEX2
, /* VERT_ATTRIB_TEX2 */
49 VBO_ATTRIB_TEX3
, /* VERT_ATTRIB_TEX3 */
50 VBO_ATTRIB_TEX4
, /* VERT_ATTRIB_TEX4 */
51 VBO_ATTRIB_TEX5
, /* VERT_ATTRIB_TEX5 */
52 VBO_ATTRIB_TEX6
, /* VERT_ATTRIB_TEX6 */
53 VBO_ATTRIB_TEX7
, /* VERT_ATTRIB_TEX7 */
54 VBO_ATTRIB_POINT_SIZE
, /* VERT_ATTRIB_POINT_SIZE */
55 VBO_ATTRIB_GENERIC0
, /* VERT_ATTRIB_GENERIC0 */
56 VBO_ATTRIB_GENERIC1
, /* VERT_ATTRIB_GENERIC1 */
57 VBO_ATTRIB_GENERIC2
, /* VERT_ATTRIB_GENERIC2 */
58 VBO_ATTRIB_GENERIC3
, /* VERT_ATTRIB_GENERIC3 */
59 VBO_ATTRIB_MAT_FRONT_AMBIENT
, /* VERT_ATTRIB_GENERIC4 */
60 VBO_ATTRIB_MAT_BACK_AMBIENT
, /* VERT_ATTRIB_GENERIC5 */
61 VBO_ATTRIB_MAT_FRONT_DIFFUSE
, /* VERT_ATTRIB_GENERIC6 */
62 VBO_ATTRIB_MAT_BACK_DIFFUSE
, /* VERT_ATTRIB_GENERIC7 */
63 VBO_ATTRIB_MAT_FRONT_SPECULAR
, /* VERT_ATTRIB_GENERIC8 */
64 VBO_ATTRIB_MAT_BACK_SPECULAR
, /* VERT_ATTRIB_GENERIC9 */
65 VBO_ATTRIB_MAT_FRONT_EMISSION
, /* VERT_ATTRIB_GENERIC10 */
66 VBO_ATTRIB_MAT_BACK_EMISSION
, /* VERT_ATTRIB_GENERIC11 */
67 VBO_ATTRIB_MAT_FRONT_SHININESS
, /* VERT_ATTRIB_GENERIC12 */
68 VBO_ATTRIB_MAT_BACK_SHININESS
, /* VERT_ATTRIB_GENERIC13 */
69 VBO_ATTRIB_MAT_FRONT_INDEXES
, /* VERT_ATTRIB_GENERIC14 */
70 VBO_ATTRIB_MAT_BACK_INDEXES
/* VERT_ATTRIB_GENERIC15 */
75 VBO_ATTRIB_POS
, /* VERT_ATTRIB_POS */
76 VBO_ATTRIB_NORMAL
, /* VERT_ATTRIB_NORMAL */
77 VBO_ATTRIB_COLOR0
, /* VERT_ATTRIB_COLOR0 */
78 VBO_ATTRIB_COLOR1
, /* VERT_ATTRIB_COLOR1 */
79 VBO_ATTRIB_FOG
, /* VERT_ATTRIB_FOG */
80 VBO_ATTRIB_COLOR_INDEX
, /* VERT_ATTRIB_COLOR_INDEX */
81 VBO_ATTRIB_EDGEFLAG
, /* VERT_ATTRIB_EDGEFLAG */
82 VBO_ATTRIB_TEX0
, /* VERT_ATTRIB_TEX0 */
83 VBO_ATTRIB_TEX1
, /* VERT_ATTRIB_TEX1 */
84 VBO_ATTRIB_TEX2
, /* VERT_ATTRIB_TEX2 */
85 VBO_ATTRIB_TEX3
, /* VERT_ATTRIB_TEX3 */
86 VBO_ATTRIB_TEX4
, /* VERT_ATTRIB_TEX4 */
87 VBO_ATTRIB_TEX5
, /* VERT_ATTRIB_TEX5 */
88 VBO_ATTRIB_TEX6
, /* VERT_ATTRIB_TEX6 */
89 VBO_ATTRIB_TEX7
, /* VERT_ATTRIB_TEX7 */
90 VBO_ATTRIB_POINT_SIZE
, /* VERT_ATTRIB_POINT_SIZE */
91 VBO_ATTRIB_GENERIC0
, /* VERT_ATTRIB_GENERIC0 */
92 VBO_ATTRIB_GENERIC1
, /* VERT_ATTRIB_GENERIC1 */
93 VBO_ATTRIB_GENERIC2
, /* VERT_ATTRIB_GENERIC2 */
94 VBO_ATTRIB_GENERIC3
, /* VERT_ATTRIB_GENERIC3 */
95 VBO_ATTRIB_GENERIC4
, /* VERT_ATTRIB_GENERIC4 */
96 VBO_ATTRIB_GENERIC5
, /* VERT_ATTRIB_GENERIC5 */
97 VBO_ATTRIB_GENERIC6
, /* VERT_ATTRIB_GENERIC6 */
98 VBO_ATTRIB_GENERIC7
, /* VERT_ATTRIB_GENERIC7 */
99 VBO_ATTRIB_GENERIC8
, /* VERT_ATTRIB_GENERIC8 */
100 VBO_ATTRIB_GENERIC9
, /* VERT_ATTRIB_GENERIC9 */
101 VBO_ATTRIB_GENERIC10
, /* VERT_ATTRIB_GENERIC10 */
102 VBO_ATTRIB_GENERIC11
, /* VERT_ATTRIB_GENERIC11 */
103 VBO_ATTRIB_GENERIC12
, /* VERT_ATTRIB_GENERIC12 */
104 VBO_ATTRIB_GENERIC13
, /* VERT_ATTRIB_GENERIC13 */
105 VBO_ATTRIB_GENERIC14
, /* VERT_ATTRIB_GENERIC14 */
106 VBO_ATTRIB_GENERIC15
/* VERT_ATTRIB_GENERIC15 */
112 vbo_exec_init(struct gl_context
*ctx
)
114 struct vbo_exec_context
*exec
= &vbo_context(ctx
)->exec
;
118 /* aelt_context should have been created by the caller */
119 assert(ctx
->aelt_context
);
121 vbo_exec_vtx_init(exec
);
123 ctx
->Driver
.NeedFlush
= 0;
124 ctx
->Driver
.CurrentExecPrimitive
= PRIM_OUTSIDE_BEGIN_END
;
126 /* The aelt_context state should still be dirty from its creation */
127 assert(_ae_is_state_dirty(ctx
));
129 exec
->eval
.recalculate_maps
= GL_TRUE
;
133 void vbo_exec_destroy( struct gl_context
*ctx
)
135 struct vbo_exec_context
*exec
= &vbo_context(ctx
)->exec
;
137 if (ctx
->aelt_context
) {
138 _ae_destroy_context( ctx
);
139 ctx
->aelt_context
= NULL
;
142 vbo_exec_vtx_destroy( exec
);
147 * In some degenarate cases we can improve our ability to merge
148 * consecutive primitives. For example:
149 * glBegin(GL_LINE_STRIP);
153 * glBegin(GL_LINE_STRIP);
157 * Can be merged as a GL_LINES prim with four vertices.
159 * This function converts 2-vertex line strips/loops into GL_LINES, etc.
162 vbo_try_prim_conversion(struct _mesa_prim
*p
)
164 if (p
->mode
== GL_LINE_STRIP
&& p
->count
== 2) {
165 /* convert 2-vertex line strip to a separate line */
168 else if ((p
->mode
== GL_TRIANGLE_STRIP
|| p
->mode
== GL_TRIANGLE_FAN
)
170 /* convert 3-vertex tri strip or fan to a separate triangle */
171 p
->mode
= GL_TRIANGLES
;
174 /* Note: we can't convert a 4-vertex quad strip to a separate quad
175 * because the vertex ordering is different. We'd have to muck
176 * around in the vertex data to make it work.
182 * Helper function for determining if two subsequent glBegin/glEnd
183 * primitives can be combined. This is only possible for GL_POINTS,
184 * GL_LINES, GL_TRIANGLES and GL_QUADS.
185 * If we return true, it means that we can concatenate p1 onto p0 (and
189 vbo_can_merge_prims(const struct _mesa_prim
*p0
, const struct _mesa_prim
*p1
)
197 /* The prim mode must match (ex: both GL_TRIANGLES) */
198 if (p0
->mode
!= p1
->mode
)
201 /* p1's vertices must come right after p0 */
202 if (p0
->start
+ p0
->count
!= p1
->start
)
205 if (p0
->basevertex
!= p1
->basevertex
||
206 p0
->num_instances
!= p1
->num_instances
||
207 p0
->base_instance
!= p1
->base_instance
)
210 /* can always merge subsequent GL_POINTS primitives */
211 if (p0
->mode
== GL_POINTS
)
214 /* independent lines with no extra vertices */
215 if (p0
->mode
== GL_LINES
&& p0
->count
% 2 == 0 && p1
->count
% 2 == 0)
218 /* independent tris */
219 if (p0
->mode
== GL_TRIANGLES
&& p0
->count
% 3 == 0 && p1
->count
% 3 == 0)
222 /* independent quads */
223 if (p0
->mode
== GL_QUADS
&& p0
->count
% 4 == 0 && p1
->count
% 4 == 0)
231 * If we've determined that p0 and p1 can be merged, this function
232 * concatenates p1 onto p0.
235 vbo_merge_prims(struct _mesa_prim
*p0
, const struct _mesa_prim
*p1
)
237 assert(vbo_can_merge_prims(p0
, p1
));
239 p0
->count
+= p1
->count
;
245 _vbo_init_inputs(struct vbo_inputs
*inputs
)
248 inputs
->vertex_processing_mode
= VP_MODE_FF
;
253 * Update the vbo_inputs's arrays to point to the vao->_VertexArray arrays
254 * according to the 'enable' bitmask.
255 * \param enable bitfield of VERT_BIT_x flags.
258 update_vao_inputs(struct gl_context
*ctx
,
259 struct vbo_inputs
*inputs
, GLbitfield enable
)
261 const struct gl_vertex_array_object
*vao
= ctx
->Array
._DrawVAO
;
263 /* Make sure we process only arrays enabled in the VAO */
264 assert((enable
& ~_mesa_get_vao_vp_inputs(vao
)) == 0);
266 /* Fill in the client arrays from the VAO */
267 const GLubyte
*const map
= _mesa_vao_attribute_map
[vao
->_AttributeMapMode
];
268 const struct gl_array_attributes
*attribs
= &vao
->VertexAttrib
[0];
269 const struct gl_vertex_buffer_binding
*bindings
= &vao
->BufferBinding
[0];
271 const int attr
= u_bit_scan(&enable
);
272 struct gl_vertex_array
*input
= &inputs
->inputs
[attr
];
273 const struct gl_array_attributes
*attrib
= &attribs
[map
[attr
]];
274 input
->VertexAttrib
= attrib
;
275 input
->BufferBinding
= &bindings
[attrib
->BufferBindingIndex
];
281 * Update the vbo_inputs's arrays to point to the vbo->currval arrays
282 * according to the 'current' bitmask.
283 * \param current bitfield of VERT_BIT_x flags.
286 update_current_inputs(struct gl_context
*ctx
,
287 struct vbo_inputs
*inputs
, GLbitfield current
)
289 gl_vertex_processing_mode mode
= ctx
->VertexProgram
._VPMode
;
291 /* All previously non current array pointers need update. */
292 GLbitfield mask
= current
& ~inputs
->current
;
293 /* On mode change, the slots aliasing with materials need update too */
294 if (mode
!= inputs
->vertex_processing_mode
)
295 mask
|= current
& VERT_BIT_MAT_ALL
;
297 struct vbo_context
*vbo
= vbo_context(ctx
);
298 const struct gl_array_attributes
*const currval
= &vbo
->current
[0];
299 const GLubyte
*const map
= _vbo_attribute_alias_map
[mode
];
301 const int attr
= u_bit_scan(&mask
);
302 struct gl_vertex_array
*input
= &inputs
->inputs
[attr
];
303 input
->VertexAttrib
= &currval
[map
[attr
]];
304 input
->BufferBinding
= &vbo
->binding
;
307 inputs
->current
= current
;
308 inputs
->vertex_processing_mode
= mode
;
313 * Update the vbo_inputs's arrays to point to the vao->_VertexArray and
314 * vbo->currval arrays according to Array._DrawVAO and
315 * Array._DrawVAOEnableAttribs.
318 _vbo_update_inputs(struct gl_context
*ctx
, struct vbo_inputs
*inputs
)
320 const GLbitfield enable
= ctx
->Array
._DrawVAOEnabledAttribs
;
322 /* Update array input pointers */
323 update_vao_inputs(ctx
, inputs
, enable
);
325 /* The rest must be current inputs. */
326 update_current_inputs(ctx
, inputs
, ~enable
& VERT_BIT_ALL
);