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 #include "mtypes.h"
  32 #include "t_context.h"
  33
  34 /* New mechanism to specify hardware vertices so that tnl can build
  35  * and manipulate them directly.
  36  */
  37
  38
  39 /* It will probably be necessary to allow drivers to specify new
  40  * emit-styles to cover all the wierd and wacky things out there.
  41  */
  42 enum tnl_attr_format {
  43    EMIT_1F,
  44    EMIT_2F,
  45    EMIT_3F,
  46    EMIT_4F,
  47    EMIT_2F_VIEWPORT,            /* do viewport transform and emit */
  48    EMIT_3F_VIEWPORT,            /* do viewport transform and emit */
  49    EMIT_4F_VIEWPORT,            /* do viewport transform and emit */
  50    EMIT_3F_XYW,                 /* for projective texture */
  51    EMIT_1UB_1F,                 /* for fog coordinate */
  52    EMIT_3UB_3F_RGB,             /* for specular color */
  53    EMIT_3UB_3F_BGR,             /* for specular color */
  54    EMIT_4UB_4F_RGBA,            /* for color */
  55    EMIT_4UB_4F_BGRA,            /* for color */
  56    EMIT_4CHAN_4F_RGBA,          /* for swrast color */
  57    EMIT_PAD,                    /* leave a hole of 'offset' bytes */
  58    EMIT_MAX
  59 };
  60
  61 struct tnl_attr_map {
  62    GLuint attrib;                       /* _TNL_ATTRIB_ enum */
  63    enum tnl_attr_format format;
  64    GLuint offset;
  65 };
  66
  67
  68
  69 /* Interpolate between two vertices to produce a third:
  70  */
  71 extern void _tnl_interp( GLcontext *ctx,
  72                          GLfloat t,
  73                          GLuint edst, GLuint eout, GLuint ein,
  74                          GLboolean force_boundary );
  75
  76 /* Copy colors from one vertex to another:
  77  */
  78 extern void _tnl_copy_pv(  GLcontext *ctx, GLuint edst, GLuint esrc );
  79
  80
  81 /* Extract a named attribute from a hardware vertex.  Will have to
  82  * reverse any viewport transformation, swizzling or other conversions
  83  * which may have been applied:
  84  */
  85 extern void _tnl_get_attr( GLcontext *ctx, const void *vertex, GLenum attrib,
  86                            GLfloat *dest );
  87
  88 /* Complementary to the above.
  89  */
  90 extern void _tnl_set_attr( GLcontext *ctx, void *vout, GLenum attrib,
  91                            const GLfloat *src );
  92
  93
  94 extern void *_tnl_get_vertex( GLcontext *ctx, GLuint nr );
  95
  96
  97 /*
  98  */
  99 extern GLuint _tnl_install_attrs( GLcontext *ctx,
 100                                   const struct tnl_attr_map *map,
 101                                   GLuint nr, const GLfloat *vp,
 102                                   GLuint unpacked_size );
 103
 104
 105
 106
 107
 108 extern void _tnl_free_vertices( GLcontext *ctx );
 109
 110 extern void _tnl_init_vertices( GLcontext *ctx,
 111                                 GLuint vb_size,
 112                                 GLuint max_vertex_size );
 113
 114 extern void *_tnl_emit_vertices_to_buffer( GLcontext *ctx,
 115                                            GLuint start,
 116                                            GLuint end,
 117                                            void *dest );
 118
 119 extern void _tnl_build_vertices( GLcontext *ctx,
 120                                  GLuint start,
 121                                  GLuint end,
 122                                  GLuint newinputs );
 123
 124 extern void _tnl_invalidate_vertices( GLcontext *ctx, GLuint newinputs );
 125
 126 extern void _tnl_invalidate_vertex_state( GLcontext *ctx, GLuint new_state );
 127
 128 extern tnl_emit_func _tnl_codegen_emit( GLcontext *ctx );
 129
 130 #define REG_IN   (0<<16)
 131 #define REG_OUT  (1<<16)
 132 #define REG_VP   (2<<16)
 133 #define REG_TMP  (3<<16)
 134 #define REG_MASK (3<<16)
 135
 136 #define REG_OFFSET_MASK  0xffff
 137
 138 #define in( offset )  (REG_IN  | (offset))
 139 #define out( offset ) (REG_OUT | (offset))
 140 #define vp( offset )  (REG_VP  | (offset))
 141 #define tmp( offset ) (REG_TMP | (offset))
 142
 143
 144 extern void _tnl_init_c_codegen( struct tnl_clipspace_codegen *p );
 145
 146 #define GET_VERTEX_STATE(ctx)  &(TNL_CONTEXT(ctx)->clipspace)
 147
 148 #endif