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