src/mesa/tnl/t_vertex.h

   1 /*
   2  * Copyright 2003 Tungsten Graphics, inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * TUNGSTEN GRAPHICS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@tungstengraphics.com>
  26  */
  27
  28 #ifndef _TNL_VERTEX_H
  29 #define _TNL_VERTEX_H
  30
  31 /* New mechanism to specify hardware vertices so that tnl can build
  32  * and manipulate them directly.
  33  */
  34
  35 enum tnl_attr_format {
  36    EMIT_1F = 1,
  37    EMIT_2F = 2,
  38    EMIT_3F = 3,
  39    EMIT_4F = 4,
  40    EMIT_2F_VIEWPORT,            /* do viewport transform and emit */
  41    EMIT_3F_VIEWPORT,            /* do viewport transform and emit */
  42    EMIT_4F_VIEWPORT,            /* do viewport transform and emit */
  43    EMIT_3F_XYW,                 /* for projective texture */
  44    EMIT_1UB_1F,                 /* for fog coordinate */
  45    EMIT_3UB_3F_BGR,             /* for specular color */
  46    EMIT_3UB_3F_RGB,             /* for specular color */
  47    EMIT_4UB_4F_BGRA,            /* for color */
  48    EMIT_4UB_4F_RGBA,            /* for color */
  49    EMIT_NOP_1F,
  50    EMIT_NOP_1UB,
  51 };
  52
  53 struct tnl_attr_map {
  54    GLuint attr;                 /* VERT_ATTRIB_ enum */
  55    enum tnl_attr_format format;
  56 };
  57
  58
  59 /* Emit hardware vertices to a given buffer:
  60  */
  61 extern void _tnl_emit( GLcontext *ctx,
  62                        GLuint start, GLuint end,
  63                        void *dest,
  64                        GLuint stride );
  65
  66 /* Interpolate between two vertices to produce a third:
  67  */
  68 extern void _tnl_interp( GLcontext *ctx,
  69                          GLfloat t,
  70                          GLuint edst, GLuint eout, GLuint ein,
  71                          GLboolean force_boundary );
  72
  73 /* Copy colors from one vertex to another:
  74  */
  75 extern void _tnl_copy_colors(  GLcontext *ctx, GLuint edst, GLuint esrc );
  76
  77
  78 /* Extract a named attribute from a hardware vertex.  Will have to
  79  * reverse any viewport transformation, swizzling or other conversions
  80  * which may have been applied:
  81  */
  82 extern void _tnl_get_attr( GLcontext *ctx, void *vertex, GLenum attrib,
  83                            GLfloat *dest );
  84
  85 /* Populate a swrast SWvertex from an attrib-style vertex.
  86  */
  87 extern void _tnl_translate( GLcontext *ctx, const void *vertex,
  88                             SWvertex *dest );
  89
  90
  91
  92 #endif