vbo_private.h revision 01e04c3f 
1/*
2 * mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
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.
23 */
24
25
26/**
27 * Types, functions, etc which are private to the VBO module.
28 */
29
30
31#ifndef VBO_PRIVATE_H
32#define VBO_PRIVATE_H
33
34
35#include "vbo/vbo_attrib.h"
36#include "vbo/vbo_exec.h"
37#include "vbo/vbo_save.h"
38#include "main/varray.h"
39
40
41struct _glapi_table;
42struct _mesa_prim;
43
44
45struct vbo_context {
46   struct gl_vertex_buffer_binding binding;
47   struct gl_array_attributes current[VBO_ATTRIB_MAX];
48
49   struct gl_vertex_array_object *VAO;
50
51   struct vbo_exec_context exec;
52   struct vbo_save_context save;
53};
54
55
56static inline struct vbo_context *
57vbo_context(struct gl_context *ctx)
58{
59   return ctx->vbo_context;
60}
61
62
63static inline const struct vbo_context *
64vbo_context_const(const struct gl_context *ctx)
65{
66   return ctx->vbo_context;
67}
68
69
70/**
71 * Array to apply the fixed function material aliasing map to
72 * an attribute value used in vbo processing inputs to an attribute
73 * as they appear in the vao.
74 */
75extern const GLubyte
76_vbo_attribute_alias_map[VP_MODE_MAX][VERT_ATTRIB_MAX];
77
78
79/**
80 * Return if format is integer. The immediate mode commands only emit floats
81 * for non-integer types, thus everything else is integer.
82 */
83static inline GLboolean
84vbo_attrtype_to_integer_flag(GLenum format)
85{
86   switch (format) {
87   case GL_FLOAT:
88   case GL_DOUBLE:
89      return GL_FALSE;
90   case GL_INT:
91   case GL_UNSIGNED_INT:
92   case GL_UNSIGNED_INT64_ARB:
93      return GL_TRUE;
94   default:
95      unreachable("Bad vertex attribute type");
96      return GL_FALSE;
97   }
98}
99
100static inline GLboolean
101vbo_attrtype_to_double_flag(GLenum format)
102{
103   switch (format) {
104   case GL_FLOAT:
105   case GL_INT:
106   case GL_UNSIGNED_INT:
107      return GL_FALSE;
108   case GL_UNSIGNED_INT64_ARB:
109   case GL_DOUBLE:
110      return GL_TRUE;
111   default:
112      unreachable("Bad vertex attribute type");
113      return GL_FALSE;
114   }
115}
116
117
118/**
119 * Return default component values for the given format.
120 * The return type is an array of fi_types, because that's how we declare
121 * the vertex storage : floats , integers or unsigned integers.
122 */
123static inline const fi_type *
124vbo_get_default_vals_as_union(GLenum format)
125{
126   static const GLfloat default_float[4] = { 0, 0, 0, 1 };
127   static const GLint default_int[4] = { 0, 0, 0, 1 };
128
129   switch (format) {
130   case GL_FLOAT:
131      return (fi_type *)default_float;
132   case GL_INT:
133   case GL_UNSIGNED_INT:
134      return (fi_type *)default_int;
135   default:
136      unreachable("Bad vertex format");
137      return NULL;
138   }
139}
140
141
142/**
143 * Compute the max number of vertices which can be stored in
144 * a vertex buffer, given the current vertex size, and the amount
145 * of space already used.
146 */
147static inline unsigned
148vbo_compute_max_verts(const struct vbo_exec_context *exec)
149{
150   unsigned n = (VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
151      (exec->vtx.vertex_size * sizeof(GLfloat));
152   if (n == 0)
153      return 0;
154   /* Subtract one so we're always sure to have room for an extra
155    * vertex for GL_LINE_LOOP -> GL_LINE_STRIP conversion.
156    */
157   n--;
158   return n;
159}
160
161
162void
163vbo_try_prim_conversion(struct _mesa_prim *p);
164
165bool
166vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1);
167
168void
169vbo_merge_prims(struct _mesa_prim *p0, const struct _mesa_prim *p1);
170
171
172/**
173 * Get the filter mask for vbo draws depending on the vertex_processing_mode.
174 */
175static inline GLbitfield
176_vbo_get_vao_filter(gl_vertex_processing_mode vertex_processing_mode)
177{
178   if (vertex_processing_mode == VP_MODE_FF) {
179      /* The materials mapped into the generic arrays */
180      return VERT_BIT_FF_ALL | VERT_BIT_MAT_ALL;
181   } else {
182      return VERT_BIT_ALL;
183   }
184}
185
186
187/**
188 * Translate the bitmask of VBO_ATTRIB_BITs to VERT_ATTRIB_BITS.
189 * Note that position/generic0 attribute aliasing is done
190 * generically in the VAO.
191 */
192static inline GLbitfield
193_vbo_get_vao_enabled_from_vbo(gl_vertex_processing_mode vertex_processing_mode,
194                              GLbitfield64 enabled)
195{
196   if (vertex_processing_mode == VP_MODE_FF) {
197      /* The materials mapped into the generic arrays */
198      return (((GLbitfield)enabled) & VERT_BIT_FF_ALL)
199         | (((GLbitfield)(enabled >> VBO_MATERIAL_SHIFT)) & VERT_BIT_MAT_ALL);
200   } else {
201      return ((GLbitfield)enabled) & VERT_BIT_ALL;
202   }
203}
204
205
206/**
207 * Set the vertex attrib for vbo draw use.
208 */
209static inline void
210_vbo_set_attrib_format(struct gl_context *ctx,
211                       struct gl_vertex_array_object *vao,
212                       gl_vert_attrib attr, GLintptr buffer_offset,
213                       GLubyte size, GLenum16 type, GLuint offset)
214{
215   const GLboolean integer = vbo_attrtype_to_integer_flag(type);
216   const GLboolean doubles = vbo_attrtype_to_double_flag(type);
217
218   if (doubles)
219      size /= 2;
220   _mesa_update_array_format(ctx, vao, attr, size, type, GL_RGBA,
221                             GL_FALSE, integer, doubles, offset);
222   /* Ptr for userspace arrays.
223    * For updating the pointer we would need to add the vao->NewArrays flag
224    * to the VAO. But but that is done already unconditionally in
225    * _mesa_update_array_format called above.
226    */
227   assert((vao->NewArrays | ~vao->_Enabled) & VERT_BIT(attr));
228   vao->VertexAttrib[attr].Ptr = ADD_POINTERS(buffer_offset, offset);
229}
230
231
232#endif /* VBO_PRIVATE_H */
233