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    /* The array of inputs used for _DrawVAO draws. */
  48    struct vbo_inputs draw_arrays;
  49
  50    struct vbo_exec_context exec;
  51    struct vbo_save_context save;
  52
  53    /* Callback into the driver.  This must always succeed, the driver
  54     * is responsible for initiating any fallback actions required:
  55     */
  56    vbo_draw_func draw_prims;
  57
  58    /* Optional callback for indirect draws. This allows multidraws to not be
  59     * broken up, as well as for the actual count to be passed in as a separate
  60     * indirect parameter.
  61     */
  62    vbo_indirect_draw_func draw_indirect_prims;
  63 };
  64
  65
  66 static inline struct vbo_context *
  67 vbo_context(struct gl_context *ctx)
  68 {
  69    return ctx->vbo_context;
  70 }
  71
  72
  73 /**
  74  * Array to apply the fixed function material aliasing map to
  75  * an attribute value used in vbo processing inputs to an attribute
  76  * as they appear in the vao.
  77  */
  78 extern const GLubyte
  79 _vbo_attribute_alias_map[VP_MODE_MAX][VERT_ATTRIB_MAX];
  80
  81
  82 /**
  83  * Return if format is integer. The immediate mode commands only emit floats
  84  * for non-integer types, thus everything else is integer.
  85  */
  86 static inline GLboolean
  87 vbo_attrtype_to_integer_flag(GLenum format)
  88 {
  89    switch (format) {
  90    case GL_FLOAT:
  91    case GL_DOUBLE:
  92       return GL_FALSE;
  93    case GL_INT:
  94    case GL_UNSIGNED_INT:
  95    case GL_UNSIGNED_INT64_ARB:
  96       return GL_TRUE;
  97    default:
  98       unreachable("Bad vertex attribute type");
  99       return GL_FALSE;
 100    }
 101 }
 102
 103 static inline GLboolean
 104 vbo_attrtype_to_double_flag(GLenum format)
 105 {
 106    switch (format) {
 107    case GL_FLOAT:
 108    case GL_INT:
 109    case GL_UNSIGNED_INT:
 110    case GL_UNSIGNED_INT64_ARB:
 111       return GL_FALSE;
 112    case GL_DOUBLE:
 113       return GL_TRUE;
 114    default:
 115       unreachable("Bad vertex attribute type");
 116       return GL_FALSE;
 117    }
 118 }
 119
 120
 121 /**
 122  * Return default component values for the given format.
 123  * The return type is an array of fi_types, because that's how we declare
 124  * the vertex storage : floats , integers or unsigned integers.
 125  */
 126 static inline const fi_type *
 127 vbo_get_default_vals_as_union(GLenum format)
 128 {
 129    static const GLfloat default_float[4] = { 0, 0, 0, 1 };
 130    static const GLint default_int[4] = { 0, 0, 0, 1 };
 131
 132    switch (format) {
 133    case GL_FLOAT:
 134       return (fi_type *)default_float;
 135    case GL_INT:
 136    case GL_UNSIGNED_INT:
 137       return (fi_type *)default_int;
 138    default:
 139       unreachable("Bad vertex format");
 140       return NULL;
 141    }
 142 }
 143
 144
 145 /**
 146  * Compute the max number of vertices which can be stored in
 147  * a vertex buffer, given the current vertex size, and the amount
 148  * of space already used.
 149  */
 150 static inline unsigned
 151 vbo_compute_max_verts(const struct vbo_exec_context *exec)
 152 {
 153    unsigned n = (VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 154       (exec->vtx.vertex_size * sizeof(GLfloat));
 155    if (n == 0)
 156       return 0;
 157    /* Subtract one so we're always sure to have room for an extra
 158     * vertex for GL_LINE_LOOP -> GL_LINE_STRIP conversion.
 159     */
 160    n--;
 161    return n;
 162 }
 163
 164
 165 void
 166 vbo_try_prim_conversion(struct _mesa_prim *p);
 167
 168 bool
 169 vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1);
 170
 171 void
 172 vbo_merge_prims(struct _mesa_prim *p0, const struct _mesa_prim *p1);
 173
 174
 175 #endif /* VBO_PRIVATE_H */