src/mesa/vbo/vbo_exec_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  5.1
   4  *
   5  * Copyright (C) 1999-2003  Brian Paul   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include "glheader.h"
  29 #include "context.h"
  30 #include "enums.h"
  31 #include "state.h"
  32 #include "macros.h"
  33
  34 #include "vbo_context.h"
  35
  36
  37 static void vbo_exec_debug_verts( struct vbo_exec_context *exec )
  38 {
  39    GLuint count = exec->vtx.vert_count;
  40    GLuint i;
  41
  42    _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
  43                 __FUNCTION__,
  44                 count,
  45                 exec->vtx.prim_count,
  46                 exec->vtx.vertex_size);
  47
  48    for (i = 0 ; i < exec->vtx.prim_count ; i++) {
  49       struct _mesa_prim *prim = &exec->vtx.prim[i];
  50       _mesa_printf("   prim %d: %s%s %d..%d %s %s\n",
  51                    i,
  52                    _mesa_lookup_enum_by_nr(prim->mode),
  53                    prim->weak ? " (weak)" : "",
  54                    prim->start,
  55                    prim->start + prim->count,
  56                    prim->begin ? "BEGIN" : "(wrap)",
  57                    prim->end ? "END" : "(wrap)");
  58    }
  59 }
  60
  61
  62 /*
  63  * NOTE: Need to have calculated primitives by this point -- do it on the fly.
  64  * NOTE: Old 'parity' issue is gone.
  65  */
  66 static GLuint vbo_copy_vertices( struct vbo_exec_context *exec )
  67 {
  68    GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
  69    GLuint ovf, i;
  70    GLuint sz = exec->vtx.vertex_size;
  71    GLfloat *dst = exec->vtx.copied.buffer;
  72    GLfloat *src = ((GLfloat *)exec->vtx.buffer_map +
  73                    exec->vtx.prim[exec->vtx.prim_count-1].start *
  74                    exec->vtx.vertex_size);
  75
  76
  77    switch( exec->ctx->Driver.CurrentExecPrimitive )
  78    {
  79    case GL_POINTS:
  80       return 0;
  81    case GL_LINES:
  82       ovf = nr&1;
  83       for (i = 0 ; i < ovf ; i++)
  84          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  85       return i;
  86    case GL_TRIANGLES:
  87       ovf = nr%3;
  88       for (i = 0 ; i < ovf ; i++)
  89          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  90       return i;
  91    case GL_QUADS:
  92       ovf = nr&3;
  93       for (i = 0 ; i < ovf ; i++)
  94          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
  95       return i;
  96    case GL_LINE_STRIP:
  97       if (nr == 0)
  98          return 0;
  99       else {
 100          _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 101          return 1;
 102       }
 103    case GL_LINE_LOOP:
 104    case GL_TRIANGLE_FAN:
 105    case GL_POLYGON:
 106       if (nr == 0)
 107          return 0;
 108       else if (nr == 1) {
 109          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 110          return 1;
 111       } else {
 112          _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
 113          _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
 114          return 2;
 115       }
 116    case GL_TRIANGLE_STRIP:
 117    case GL_QUAD_STRIP:
 118       switch (nr) {
 119       case 0: ovf = 0; break;
 120       case 1: ovf = 1; break;
 121       default: ovf = 2 + (nr&1); break;
 122       }
 123       for (i = 0 ; i < ovf ; i++)
 124          _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
 125       return i;
 126    case GL_POLYGON+1:
 127       return 0;
 128    default:
 129       assert(0);
 130       return 0;
 131    }
 132 }
 133
 134
 135
 136 /* TODO: populate these as the vertex is defined:
 137  */
 138 static void vbo_exec_bind_arrays( GLcontext *ctx )
 139 {
 140    struct vbo_context *vbo = vbo_context(ctx);
 141    struct vbo_exec_context *exec = &vbo->exec;
 142    struct gl_client_array *arrays = exec->vtx.arrays;
 143    GLuint count = exec->vtx.vert_count;
 144    GLubyte *data = exec->vtx.buffer_map;
 145    const GLuint *map;
 146    GLuint attr;
 147
 148    /* Install the default (ie Current) attributes first, then overlay
 149     * all active ones.
 150     */
 151    switch (get_program_mode(exec->ctx)) {
 152    case VP_NONE:
 153       memcpy(arrays,      vbo->legacy_currval, 16 * sizeof(arrays[0]));
 154       memcpy(arrays + 16, vbo->mat_currval,    16 * sizeof(arrays[0]));
 155       map = vbo->map_vp_none;
 156       break;
 157    case VP_NV:
 158    case VP_ARB:
 159       /* The aliasing of attributes for NV vertex programs has already
 160        * occurred.  NV vertex programs cannot access material values,
 161        * nor attributes greater than VERT_ATTRIB_TEX7.
 162        */
 163       memcpy(arrays,      vbo->legacy_currval,  16 * sizeof(arrays[0]));
 164       memcpy(arrays + 16, vbo->generic_currval, 16 * sizeof(arrays[0]));
 165       map = vbo->map_vp_arb;
 166       break;
 167    }
 168
 169    /* Make all active attributes (including edgeflag) available as
 170     * arrays of floats.
 171     */
 172    for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
 173       GLuint src = map[attr];
 174
 175       if (exec->vtx.attrsz[src]) {
 176          arrays[attr].Ptr = (void *)data;
 177          arrays[attr].Size = exec->vtx.attrsz[src];
 178          arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
 179          arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
 180          arrays[attr].Type = GL_FLOAT;
 181          arrays[attr].Enabled = 1;
 182          arrays[attr].BufferObj = exec->vtx.bufferobj; /* NullBufferObj */
 183          arrays[attr]._MaxElement = count; /* ??? */
 184
 185          data += exec->vtx.attrsz[attr] * sizeof(GLfloat);
 186       }
 187    }
 188 }
 189
 190
 191 /**
 192  * Execute the buffer and save copied verts.
 193  */
 194 void vbo_exec_vtx_flush( struct vbo_exec_context *exec )
 195 {
 196    if (0)
 197       vbo_exec_debug_verts( exec );
 198
 199
 200    if (exec->vtx.prim_count &&
 201        exec->vtx.vert_count) {
 202
 203       exec->vtx.copied.nr = vbo_copy_vertices( exec );
 204
 205       if (exec->vtx.copied.nr != exec->vtx.vert_count) {
 206          GLcontext *ctx = exec->ctx;
 207
 208          vbo_exec_bind_arrays( ctx );
 209
 210          vbo_context(ctx)->draw_prims( ctx,
 211                                        exec->vtx.inputs,
 212                                        exec->vtx.prim,
 213                                        exec->vtx.prim_count,
 214                                        NULL,
 215                                        0,
 216                                        exec->vtx.vert_count );
 217       }
 218    }
 219
 220    exec->vtx.prim_count = 0;
 221    exec->vtx.vert_count = 0;
 222    exec->vtx.vbptr = (GLfloat *)exec->vtx.buffer_map;
 223 }