2 * mesa 3-D graphics library
4 * Copyright (C) 1999-2006 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.
27 * Types, functions, etc which are private to the VBO module.
35 #include "vbo/vbo_attrib.h"
36 #include "vbo/vbo_exec.h"
37 #include "vbo/vbo_save.h"
38 #include "main/mtypes.h"
39 #include "main/varray.h"
47 struct gl_vertex_buffer_binding binding
;
48 struct gl_array_attributes current
[VBO_ATTRIB_MAX
];
49 /* The array of inputs used for _DrawVAO draws. */
50 struct vbo_inputs draw_arrays
;
52 struct gl_vertex_array_object
*VAO
;
54 struct vbo_exec_context exec
;
55 struct vbo_save_context save
;
57 /* Callback into the driver. This must always succeed, the driver
58 * is responsible for initiating any fallback actions required:
60 vbo_draw_func draw_prims
;
64 static inline struct vbo_context
*
65 vbo_context(struct gl_context
*ctx
)
67 return ctx
->vbo_context
;
72 * Array to apply the fixed function material aliasing map to
73 * an attribute value used in vbo processing inputs to an attribute
74 * as they appear in the vao.
77 _vbo_attribute_alias_map
[VP_MODE_MAX
][VERT_ATTRIB_MAX
];
81 * Return if format is integer. The immediate mode commands only emit floats
82 * for non-integer types, thus everything else is integer.
84 static inline GLboolean
85 vbo_attrtype_to_integer_flag(GLenum format
)
93 case GL_UNSIGNED_INT64_ARB
:
96 unreachable("Bad vertex attribute type");
101 static inline GLboolean
102 vbo_attrtype_to_double_flag(GLenum format
)
107 case GL_UNSIGNED_INT
:
108 case GL_UNSIGNED_INT64_ARB
:
113 unreachable("Bad vertex attribute type");
120 * Return default component values for the given format.
121 * The return type is an array of fi_types, because that's how we declare
122 * the vertex storage : floats , integers or unsigned integers.
124 static inline const fi_type
*
125 vbo_get_default_vals_as_union(GLenum format
)
127 static const GLfloat default_float
[4] = { 0, 0, 0, 1 };
128 static const GLint default_int
[4] = { 0, 0, 0, 1 };
132 return (fi_type
*)default_float
;
134 case GL_UNSIGNED_INT
:
135 return (fi_type
*)default_int
;
137 unreachable("Bad vertex format");
144 * Compute the max number of vertices which can be stored in
145 * a vertex buffer, given the current vertex size, and the amount
146 * of space already used.
148 static inline unsigned
149 vbo_compute_max_verts(const struct vbo_exec_context
*exec
)
151 unsigned n
= (VBO_VERT_BUFFER_SIZE
- exec
->vtx
.buffer_used
) /
152 (exec
->vtx
.vertex_size
* sizeof(GLfloat
));
155 /* Subtract one so we're always sure to have room for an extra
156 * vertex for GL_LINE_LOOP -> GL_LINE_STRIP conversion.
164 vbo_try_prim_conversion(struct _mesa_prim
*p
);
167 vbo_can_merge_prims(const struct _mesa_prim
*p0
, const struct _mesa_prim
*p1
);
170 vbo_merge_prims(struct _mesa_prim
*p0
, const struct _mesa_prim
*p1
);
174 * Get the filter mask for vbo draws depending on the vertex_processing_mode.
176 static inline GLbitfield
177 _vbo_get_vao_filter(gl_vertex_processing_mode vertex_processing_mode
)
179 if (vertex_processing_mode
== VP_MODE_FF
) {
180 /* The materials mapped into the generic arrays */
181 return VERT_BIT_FF_ALL
| VERT_BIT_MAT_ALL
;
189 * Translate the bitmask of VBO_ATTRIB_BITs to VERT_ATTRIB_BITS.
190 * Note that position/generic0 attribute aliasing is done
191 * generically in the VAO.
193 static inline GLbitfield
194 _vbo_get_vao_enabled_from_vbo(gl_vertex_processing_mode vertex_processing_mode
,
195 GLbitfield64 enabled
)
197 if (vertex_processing_mode
== VP_MODE_FF
) {
198 /* The materials mapped into the generic arrays */
199 return (((GLbitfield
)enabled
) & VERT_BIT_FF_ALL
)
200 | (((GLbitfield
)(enabled
>> VBO_MATERIAL_SHIFT
)) & VERT_BIT_MAT_ALL
);
202 return ((GLbitfield
)enabled
) & VERT_BIT_ALL
;
208 * Set the vertex attrib for vbo draw use.
211 _vbo_set_attrib_format(struct gl_context
*ctx
,
212 struct gl_vertex_array_object
*vao
,
213 gl_vert_attrib attr
, GLintptr buffer_offset
,
214 GLubyte size
, GLenum16 type
, GLuint offset
)
216 const GLboolean integer
= vbo_attrtype_to_integer_flag(type
);
217 const GLboolean doubles
= vbo_attrtype_to_double_flag(type
);
218 _mesa_update_array_format(ctx
, vao
, attr
, size
, type
, GL_RGBA
,
219 GL_FALSE
, integer
, doubles
, offset
);
220 /* Ptr for userspace arrays */
221 vao
->VertexAttrib
[attr
].Ptr
= ADD_POINTERS(buffer_offset
, offset
);
225 #endif /* VBO_PRIVATE_H */