src/mesa/vbo/vbo_exec.h

   1 /**************************************************************************
   2
   3 Copyright 2002 Tungsten Graphics Inc., Cedar Park, Texas.
   4
   5 All Rights Reserved.
   6
   7 Permission is hereby granted, free of charge, to any person obtaining a
   8 copy of this software and associated documentation files (the "Software"),
   9 to deal in the Software without restriction, including without limitation
  10 on the rights to use, copy, modify, merge, publish, distribute, sub
  11 license, and/or sell copies of the Software, and to permit persons to whom
  12 the Software is furnished to do so, subject to the following conditions:
  13
  14 The above copyright notice and this permission notice (including the next
  15 paragraph) shall be included in all copies or substantial portions of the
  16 Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21 TUNGSTEN GRAPHICS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24 USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27
  28 /*
  29  * Authors:
  30  *   Keith Whitwell <keith@tungstengraphics.com>
  31  *
  32  */
  33
  34 #ifndef __VBO_EXEC_H__
  35 #define __VBO_EXEC_H__
  36
  37 #include "main/mfeatures.h"
  38 #include "main/mtypes.h"
  39 #include "vbo.h"
  40 #include "vbo_attrib.h"
  41
  42
  43 /**
  44  * Max number of primitives (number of glBegin/End pairs) per VBO.
  45  */
  46 #define VBO_MAX_PRIM 64
  47
  48
  49 /**
  50  * Size of the VBO to use for glBegin/glVertex/glEnd-style rendering.
  51  */
  52 #define VBO_VERT_BUFFER_SIZE (1024*64)  /* bytes */
  53
  54
  55 /** Current vertex program mode */
  56 enum vp_mode {
  57    VP_NONE,   /**< fixed function */
  58    VP_NV,     /**< NV vertex program */
  59    VP_ARB     /**< ARB vertex program or GLSL vertex shader */
  60 };
  61
  62
  63 struct vbo_exec_eval1_map {
  64    struct gl_1d_map *map;
  65    GLuint sz;
  66 };
  67
  68 struct vbo_exec_eval2_map {
  69    struct gl_2d_map *map;
  70    GLuint sz;
  71 };
  72
  73
  74
  75 struct vbo_exec_copied_vtx {
  76    GLfloat buffer[VBO_ATTRIB_MAX * 4 * VBO_MAX_COPIED_VERTS];
  77    GLuint nr;
  78 };
  79
  80
  81 /** Used to signal when transitioning from one kind of drawing method
  82  * to another.
  83  */
  84 enum draw_method
  85 {
  86    DRAW_NONE,          /**< Initial value only */
  87    DRAW_BEGIN_END,
  88    DRAW_DISPLAY_LIST,
  89    DRAW_ARRAYS
  90 };
  91
  92
  93 struct vbo_exec_context
  94 {
  95    struct gl_context *ctx;
  96    GLvertexformat vtxfmt;
  97    GLvertexformat vtxfmt_noop;
  98
  99    enum draw_method last_draw_method;
 100
 101    struct {
 102       struct gl_buffer_object *bufferobj;
 103
 104       GLuint vertex_size;       /* in dwords */
 105
 106       struct _mesa_prim prim[VBO_MAX_PRIM];
 107       GLuint prim_count;
 108
 109       GLfloat *buffer_map;
 110       GLfloat *buffer_ptr;              /* cursor, points into buffer */
 111       GLuint   buffer_used;             /* in bytes */
 112       GLfloat vertex[VBO_ATTRIB_MAX*4]; /* current vertex */
 113
 114       GLuint vert_count;
 115       GLuint max_vert;
 116       struct vbo_exec_copied_vtx copied;
 117
 118       GLubyte attrsz[VBO_ATTRIB_MAX];
 119       GLubyte active_sz[VBO_ATTRIB_MAX];
 120
 121       GLfloat *attrptr[VBO_ATTRIB_MAX];
 122       struct gl_client_array arrays[VERT_ATTRIB_MAX];
 123
 124       /* According to program mode, the values above plus current
 125        * values are squashed down to the 32 attributes passed to the
 126        * vertex program below:
 127        */
 128       const struct gl_client_array *inputs[VERT_ATTRIB_MAX];
 129    } vtx;
 130
 131
 132    struct {
 133       GLboolean recalculate_maps;
 134       struct vbo_exec_eval1_map map1[VERT_ATTRIB_MAX];
 135       struct vbo_exec_eval2_map map2[VERT_ATTRIB_MAX];
 136    } eval;
 137
 138    struct {
 139       /* Arrays and current values manipulated according to program
 140        * mode, etc.  These are the attributes as seen by vertex
 141        * programs:
 142        */
 143       const struct gl_client_array *inputs[VERT_ATTRIB_MAX];
 144       GLboolean recalculate_inputs;
 145    } array;
 146
 147    /* Which flags to set in vbo_exec_BeginVertices() */
 148    GLbitfield begin_vertices_flags;
 149
 150 #ifdef DEBUG
 151    GLint flush_call_depth;
 152 #endif
 153 };
 154
 155
 156
 157 /* External API:
 158  */
 159 void vbo_exec_init( struct gl_context *ctx );
 160 void vbo_exec_destroy( struct gl_context *ctx );
 161 void vbo_exec_invalidate_state( struct gl_context *ctx, GLuint new_state );
 162
 163 void vbo_exec_BeginVertices( struct gl_context *ctx );
 164 void vbo_exec_FlushVertices( struct gl_context *ctx, GLuint flags );
 165
 166
 167 /* Internal functions:
 168  */
 169 void vbo_exec_array_init( struct vbo_exec_context *exec );
 170 void vbo_exec_array_destroy( struct vbo_exec_context *exec );
 171
 172
 173 void vbo_exec_vtx_init( struct vbo_exec_context *exec );
 174 void vbo_exec_vtx_destroy( struct vbo_exec_context *exec );
 175
 176
 177 /**
 178  * This is called by glBegin, glDrawArrays and glDrawElements (and
 179  * variations of those calls).  When we transition from immediate mode
 180  * drawing to array drawing we need to invalidate the array state.
 181  *
 182  * glBegin/End builds vertex arrays.  Those arrays may look identical
 183  * to glDrawArrays arrays except that the position of the elements may
 184  * be different.  For example, arrays of (position3v, normal3f) vs. arrays
 185  * of (normal3f, position3f).  So we need to make sure we notify drivers
 186  * that arrays may be changing.
 187  */
 188 static inline void
 189 vbo_draw_method(struct vbo_exec_context *exec, enum draw_method method)
 190 {
 191    if (exec->last_draw_method != method) {
 192       struct gl_context *ctx = exec->ctx;
 193       ctx->Driver.UpdateState(ctx, _NEW_ARRAY);
 194       exec->last_draw_method = method;
 195    }
 196 }
 197
 198
 199 #if FEATURE_beginend
 200
 201 void vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap );
 202 void vbo_exec_vtx_map( struct vbo_exec_context *exec );
 203
 204 #else /* FEATURE_beginend */
 205
 206 static inline void
 207 vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
 208 {
 209 }
 210
 211 static inline void
 212 vbo_exec_vtx_map( struct vbo_exec_context *exec )
 213 {
 214 }
 215
 216 #endif /* FEATURE_beginend */
 217
 218 void vbo_exec_vtx_wrap( struct vbo_exec_context *exec );
 219
 220 void vbo_exec_eval_update( struct vbo_exec_context *exec );
 221
 222 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
 223                                      GLfloat u, GLfloat v );
 224
 225 void vbo_exec_do_EvalCoord1f( struct vbo_exec_context *exec,
 226                                      GLfloat u);
 227
 228 #endif