src/mesa/vbo/vbo_private.h

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