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 #include "main/macros.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 static inline const struct vbo_context *
  65 vbo_context_const(const 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       return GL_FALSE;
 109    case GL_UNSIGNED_INT64_ARB:
 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 static inline void
 120 vbo_set_vertex_format(struct gl_vertex_format* vertex_format,
 121                       GLubyte size, GLenum16 type)
 122 {
 123    _mesa_set_vertex_format(vertex_format, size, type, GL_RGBA, GL_FALSE,
 124                            vbo_attrtype_to_integer_flag(type),
 125                            vbo_attrtype_to_double_flag(type));
 126 }
 127
 128
 129 /**
 130  * Return default component values for the given format.
 131  * The return type is an array of fi_types, because that's how we declare
 132  * the vertex storage : floats , integers or unsigned integers.
 133  */
 134 static inline const fi_type *
 135 vbo_get_default_vals_as_union(GLenum format)
 136 {
 137    static const GLfloat default_float[4] = { 0, 0, 0, 1 };
 138    static const GLint default_int[4] = { 0, 0, 0, 1 };
 139    static const GLdouble default_double[4] = { 0, 0, 0, 1 };
 140    static const uint64_t default_uint64[4] = { 0, 0, 0, 1 };
 141
 142    switch (format) {
 143    case GL_FLOAT:
 144       return (fi_type *)default_float;
 145    case GL_INT:
 146    case GL_UNSIGNED_INT:
 147       return (fi_type *)default_int;
 148    case GL_DOUBLE:
 149       return (fi_type *)default_double;
 150    case GL_UNSIGNED_INT64_ARB:
 151       return (fi_type *)default_uint64;
 152    default:
 153       unreachable("Bad vertex format");
 154       return NULL;
 155    }
 156 }
 157
 158
 159 /**
 160  * Compute the max number of vertices which can be stored in
 161  * a vertex buffer, given the current vertex size, and the amount
 162  * of space already used.
 163  */
 164 static inline unsigned
 165 vbo_compute_max_verts(const struct vbo_exec_context *exec)
 166 {
 167    unsigned n = (exec->ctx->Const.glBeginEndBufferSize -
 168                  exec->vtx.buffer_used) /
 169                 (exec->vtx.vertex_size * sizeof(GLfloat));
 170    if (n == 0)
 171       return 0;
 172    /* Subtract one so we're always sure to have room for an extra
 173     * vertex for GL_LINE_LOOP -> GL_LINE_STRIP conversion.
 174     */
 175    n--;
 176    return n;
 177 }
 178
 179
 180 void
 181 vbo_try_prim_conversion(struct _mesa_prim *p);
 182
 183 bool
 184 vbo_merge_draws(struct gl_context *ctx, bool in_dlist,
 185                 struct _mesa_prim *p0, const struct _mesa_prim *p1);
 186
 187 unsigned
 188 vbo_copy_vertices(struct gl_context *ctx,
 189                   GLenum mode,
 190                   struct _mesa_prim *last_prim,
 191                   unsigned vertex_size,
 192                   bool in_dlist,
 193                   fi_type *dst,
 194                   const fi_type *src);
 195
 196 /**
 197  * Get the filter mask for vbo draws depending on the vertex_processing_mode.
 198  */
 199 static inline GLbitfield
 200 _vbo_get_vao_filter(gl_vertex_processing_mode vertex_processing_mode)
 201 {
 202    if (vertex_processing_mode == VP_MODE_FF) {
 203       /* The materials mapped into the generic arrays */
 204       return VERT_BIT_FF_ALL | VERT_BIT_MAT_ALL;
 205    } else {
 206       return VERT_BIT_ALL;
 207    }
 208 }
 209
 210
 211 /**
 212  * Translate the bitmask of VBO_ATTRIB_BITs to VERT_ATTRIB_BITS.
 213  * Note that position/generic0 attribute aliasing is done
 214  * generically in the VAO.
 215  */
 216 static inline GLbitfield
 217 _vbo_get_vao_enabled_from_vbo(gl_vertex_processing_mode vertex_processing_mode,
 218                               GLbitfield64 enabled)
 219 {
 220    if (vertex_processing_mode == VP_MODE_FF) {
 221       /* The materials mapped into the generic arrays */
 222       return (((GLbitfield)enabled) & VERT_BIT_FF_ALL)
 223          | (((GLbitfield)(enabled >> VBO_MATERIAL_SHIFT)) & VERT_BIT_MAT_ALL);
 224    } else {
 225       return ((GLbitfield)enabled) & VERT_BIT_ALL;
 226    }
 227 }
 228
 229
 230 /**
 231  * Set the vertex attrib for vbo draw use.
 232  */
 233 static inline void
 234 _vbo_set_attrib_format(struct gl_context *ctx,
 235                        struct gl_vertex_array_object *vao,
 236                        gl_vert_attrib attr, GLintptr buffer_offset,
 237                        GLubyte size, GLenum16 type, GLuint offset)
 238 {
 239    const GLboolean integer = vbo_attrtype_to_integer_flag(type);
 240    const GLboolean doubles = vbo_attrtype_to_double_flag(type);
 241
 242    if (doubles)
 243       size /= 2;
 244    _mesa_update_array_format(ctx, vao, attr, size, type, GL_RGBA,
 245                              GL_FALSE, integer, doubles, offset);
 246    vao->NewArrays |= vao->Enabled & VERT_BIT(attr);
 247    vao->VertexAttrib[attr].Ptr = ADD_POINTERS(buffer_offset, offset);
 248 }
 249
 250
 251 #endif /* VBO_PRIVATE_H */