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/varray.h"
  39
  40
  41 struct _glapi_table;
  42 struct _mesa_prim;
  43
  44
  45 struct 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
  56 static inline struct vbo_context *
  57 vbo_context(struct gl_context *ctx)
  58 {
  59    return ctx->vbo_context;
  60 }
  61
  62
  63 static inline const struct vbo_context *
  64 vbo_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  */
  75 extern 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  */
  83 static inline GLboolean
  84 vbo_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
 100 static inline GLboolean
 101 vbo_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  */
 123 static inline const fi_type *
 124 vbo_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  */
 147 static inline unsigned
 148 vbo_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
 162 void
 163 vbo_try_prim_conversion(struct _mesa_prim *p);
 164
 165 bool
 166 vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1);
 167
 168 void
 169 vbo_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  */
 175 static 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  */
 192 static 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  */
 209 static 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 */