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
  40
  41 struct _glapi_table;
  42 struct _mesa_prim;
  43
  44
  45 struct vbo_context {
  46    struct gl_vertex_array currval[VBO_ATTRIB_MAX];
  47
  48    struct vbo_exec_context exec;
  49    struct vbo_save_context save;
  50
  51    /* Callback into the driver.  This must always succeed, the driver
  52     * is responsible for initiating any fallback actions required:
  53     */
  54    vbo_draw_func draw_prims;
  55
  56    /* Optional callback for indirect draws. This allows multidraws to not be
  57     * broken up, as well as for the actual count to be passed in as a separate
  58     * indirect parameter.
  59     */
  60    vbo_indirect_draw_func draw_indirect_prims;
  61 };
  62
  63
  64 static inline struct vbo_context *
  65 vbo_context(struct gl_context *ctx)
  66 {
  67    return ctx->vbo_context;
  68 }
  69
  70
  71 /**
  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.
  75  */
  76 extern const GLubyte
  77 _vbo_attribute_alias_map[VP_MODE_MAX][VERT_ATTRIB_MAX];
  78
  79
  80 /**
  81  * Return if format is integer. The immediate mode commands only emit floats
  82  * for non-integer types, thus everything else is integer.
  83  */
  84 static inline GLboolean
  85 vbo_attrtype_to_integer_flag(GLenum format)
  86 {
  87    switch (format) {
  88    case GL_FLOAT:
  89    case GL_DOUBLE:
  90       return GL_FALSE;
  91    case GL_INT:
  92    case GL_UNSIGNED_INT:
  93    case GL_UNSIGNED_INT64_ARB:
  94       return GL_TRUE;
  95    default:
  96       unreachable("Bad vertex attribute type");
  97       return GL_FALSE;
  98    }
  99 }
 100
 101 static inline GLboolean
 102 vbo_attrtype_to_double_flag(GLenum format)
 103 {
 104    switch (format) {
 105    case GL_FLOAT:
 106    case GL_INT:
 107    case GL_UNSIGNED_INT:
 108    case GL_UNSIGNED_INT64_ARB:
 109       return GL_FALSE;
 110    case GL_DOUBLE:
 111       return GL_TRUE;
 112    default:
 113       unreachable("Bad vertex attribute type");
 114       return GL_FALSE;
 115    }
 116 }
 117
 118
 119 /**
 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.
 123  */
 124 static inline const fi_type *
 125 vbo_get_default_vals_as_union(GLenum format)
 126 {
 127    static const GLfloat default_float[4] = { 0, 0, 0, 1 };
 128    static const GLint default_int[4] = { 0, 0, 0, 1 };
 129
 130    switch (format) {
 131    case GL_FLOAT:
 132       return (fi_type *)default_float;
 133    case GL_INT:
 134    case GL_UNSIGNED_INT:
 135       return (fi_type *)default_int;
 136    default:
 137       unreachable("Bad vertex format");
 138       return NULL;
 139    }
 140 }
 141
 142
 143 /**
 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.
 147  */
 148 static inline unsigned
 149 vbo_compute_max_verts(const struct vbo_exec_context *exec)
 150 {
 151    unsigned n = (VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 152       (exec->vtx.vertex_size * sizeof(GLfloat));
 153    if (n == 0)
 154       return 0;
 155    /* Subtract one so we're always sure to have room for an extra
 156     * vertex for GL_LINE_LOOP -> GL_LINE_STRIP conversion.
 157     */
 158    n--;
 159    return n;
 160 }
 161
 162
 163 void
 164 vbo_try_prim_conversion(struct _mesa_prim *p);
 165
 166 bool
 167 vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1);
 168
 169 void
 170 vbo_merge_prims(struct _mesa_prim *p0, const struct _mesa_prim *p1);
 171
 172
 173 #endif /* VBO_PRIVATE_H */