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_array currval[VBO_ATTRIB_MAX];
  48    /* The array of inputs used for _DrawVAO draws. */
  49    struct vbo_inputs draw_arrays;
  50
  51    struct gl_vertex_array_object *VAO;
  52
  53    struct vbo_exec_context exec;
  54    struct vbo_save_context save;
  55
  56    /* Callback into the driver.  This must always succeed, the driver
  57     * is responsible for initiating any fallback actions required:
  58     */
  59    vbo_draw_func draw_prims;
  60
  61    /* Optional callback for indirect draws. This allows multidraws to not be
  62     * broken up, as well as for the actual count to be passed in as a separate
  63     * indirect parameter.
  64     */
  65    vbo_indirect_draw_func draw_indirect_prims;
  66 };
  67
  68
  69 static inline struct vbo_context *
  70 vbo_context(struct gl_context *ctx)
  71 {
  72    return ctx->vbo_context;
  73 }
  74
  75
  76 /**
  77  * Array to apply the fixed function material aliasing map to
  78  * an attribute value used in vbo processing inputs to an attribute
  79  * as they appear in the vao.
  80  */
  81 extern const GLubyte
  82 _vbo_attribute_alias_map[VP_MODE_MAX][VERT_ATTRIB_MAX];
  83
  84
  85 /**
  86  * Return if format is integer. The immediate mode commands only emit floats
  87  * for non-integer types, thus everything else is integer.
  88  */
  89 static inline GLboolean
  90 vbo_attrtype_to_integer_flag(GLenum format)
  91 {
  92    switch (format) {
  93    case GL_FLOAT:
  94    case GL_DOUBLE:
  95       return GL_FALSE;
  96    case GL_INT:
  97    case GL_UNSIGNED_INT:
  98    case GL_UNSIGNED_INT64_ARB:
  99       return GL_TRUE;
 100    default:
 101       unreachable("Bad vertex attribute type");
 102       return GL_FALSE;
 103    }
 104 }
 105
 106 static inline GLboolean
 107 vbo_attrtype_to_double_flag(GLenum format)
 108 {
 109    switch (format) {
 110    case GL_FLOAT:
 111    case GL_INT:
 112    case GL_UNSIGNED_INT:
 113    case GL_UNSIGNED_INT64_ARB:
 114       return GL_FALSE;
 115    case GL_DOUBLE:
 116       return GL_TRUE;
 117    default:
 118       unreachable("Bad vertex attribute type");
 119       return GL_FALSE;
 120    }
 121 }
 122
 123
 124 /**
 125  * Return default component values for the given format.
 126  * The return type is an array of fi_types, because that's how we declare
 127  * the vertex storage : floats , integers or unsigned integers.
 128  */
 129 static inline const fi_type *
 130 vbo_get_default_vals_as_union(GLenum format)
 131 {
 132    static const GLfloat default_float[4] = { 0, 0, 0, 1 };
 133    static const GLint default_int[4] = { 0, 0, 0, 1 };
 134
 135    switch (format) {
 136    case GL_FLOAT:
 137       return (fi_type *)default_float;
 138    case GL_INT:
 139    case GL_UNSIGNED_INT:
 140       return (fi_type *)default_int;
 141    default:
 142       unreachable("Bad vertex format");
 143       return NULL;
 144    }
 145 }
 146
 147
 148 /**
 149  * Compute the max number of vertices which can be stored in
 150  * a vertex buffer, given the current vertex size, and the amount
 151  * of space already used.
 152  */
 153 static inline unsigned
 154 vbo_compute_max_verts(const struct vbo_exec_context *exec)
 155 {
 156    unsigned n = (VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
 157       (exec->vtx.vertex_size * sizeof(GLfloat));
 158    if (n == 0)
 159       return 0;
 160    /* Subtract one so we're always sure to have room for an extra
 161     * vertex for GL_LINE_LOOP -> GL_LINE_STRIP conversion.
 162     */
 163    n--;
 164    return n;
 165 }
 166
 167
 168 void
 169 vbo_try_prim_conversion(struct _mesa_prim *p);
 170
 171 bool
 172 vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1);
 173
 174 void
 175 vbo_merge_prims(struct _mesa_prim *p0, const struct _mesa_prim *p1);
 176
 177
 178 /**
 179  * Get the filter mask for vbo draws depending on the vertex_processing_mode.
 180  */
 181 static inline GLbitfield
 182 _vbo_get_vao_filter(gl_vertex_processing_mode vertex_processing_mode)
 183 {
 184    if (vertex_processing_mode == VP_MODE_FF) {
 185       /* The materials mapped into the generic arrays */
 186       return VERT_BIT_FF_ALL | VERT_BIT_MAT_ALL;
 187    } else {
 188       return VERT_BIT_ALL;
 189    }
 190 }
 191
 192
 193 /**
 194  * Translate the bitmask of VBO_ATTRIB_BITs to VERT_ATTRIB_BITS.
 195  * Note that position/generic0 attribute aliasing is done
 196  * generically in the VAO.
 197  */
 198 static inline GLbitfield
 199 _vbo_get_vao_enabled_from_vbo(gl_vertex_processing_mode vertex_processing_mode,
 200                               GLbitfield64 enabled)
 201 {
 202    if (vertex_processing_mode == VP_MODE_FF) {
 203       /* The materials mapped into the generic arrays */
 204       return (((GLbitfield)enabled) & VERT_BIT_FF_ALL)
 205          | (((GLbitfield)(enabled >> VBO_MATERIAL_SHIFT)) & VERT_BIT_MAT_ALL);
 206    } else {
 207       return ((GLbitfield)enabled) & VERT_BIT_ALL;
 208    }
 209 }
 210
 211
 212 /**
 213  * Set the vertex attrib for vbo draw use.
 214  */
 215 static inline void
 216 _vbo_set_attrib_format(struct gl_context *ctx,
 217                        struct gl_vertex_array_object *vao,
 218                        gl_vert_attrib attr, GLintptr buffer_offset,
 219                        GLubyte size, GLenum16 type, GLuint offset)
 220 {
 221    const GLboolean integer = vbo_attrtype_to_integer_flag(type);
 222    const GLboolean doubles = vbo_attrtype_to_double_flag(type);
 223    _mesa_update_array_format(ctx, vao, attr, size, type, GL_RGBA,
 224                              GL_FALSE, integer, doubles, offset);
 225    /* Ptr for userspace arrays */
 226    vao->VertexAttrib[attr].Ptr = ADD_POINTERS(buffer_offset, offset);
 227 }
 228
 229
 230 #endif /* VBO_PRIVATE_H */