src/mesa/vbo/vbo_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2005  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  * Authors:
  25  *    Keith Whitwell <keithw@vmware.com>
  26  */
  27
  28 #include "main/imports.h"
  29 #include "main/mtypes.h"
  30 #include "main/api_arrayelt.h"
  31 #include "main/bufferobj.h"
  32 #include "math/m_eval.h"
  33 #include "vbo.h"
  34 #include "vbo_context.h"
  35
  36
  37 static GLuint check_size( const GLfloat *attr )
  38 {
  39    if (attr[3] != 1.0F) return 4;
  40    if (attr[2] != 0.0F) return 3;
  41    if (attr[1] != 0.0F) return 2;
  42    return 1;
  43 }
  44
  45
  46 /**
  47  * Helper for initializing a vertex array.
  48  */
  49 static void
  50 init_array(struct gl_context *ctx, struct gl_vertex_array *cl,
  51            unsigned size, const void *pointer)
  52 {
  53    memset(cl, 0, sizeof(*cl));
  54
  55    cl->Size = size;
  56    cl->Type = GL_FLOAT;
  57    cl->Format = GL_RGBA;
  58    cl->StrideB = 0;
  59    cl->_ElementSize = cl->Size * sizeof(GLfloat);
  60    cl->Ptr = pointer;
  61
  62    _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  63                                  ctx->Shared->NullBufferObj);
  64 }
  65
  66
  67 /**
  68  * Set up the vbo->currval arrays to point at the context's current
  69  * vertex attributes (with strides = 0).
  70  */
  71 static void init_legacy_currval(struct gl_context *ctx)
  72 {
  73    struct vbo_context *vbo = vbo_context(ctx);
  74    GLuint i;
  75
  76    /* Set up a constant (StrideB == 0) array for each current
  77     * attribute:
  78     */
  79    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  80       struct gl_vertex_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)];
  81
  82       init_array(ctx, cl,
  83                  check_size(ctx->Current.Attrib[i]),
  84                  ctx->Current.Attrib[i]);
  85    }
  86 }
  87
  88
  89 static void init_generic_currval(struct gl_context *ctx)
  90 {
  91    struct vbo_context *vbo = vbo_context(ctx);
  92    GLuint i;
  93
  94    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
  95       struct gl_vertex_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
  96
  97       init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
  98    }
  99 }
 100
 101
 102 static void init_mat_currval(struct gl_context *ctx)
 103 {
 104    struct vbo_context *vbo = vbo_context(ctx);
 105    GLuint i;
 106
 107    /* Set up a constant (StrideB == 0) array for each current
 108     * attribute:
 109     */
 110    for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 111       struct gl_vertex_array *cl =
 112          &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
 113       unsigned size;
 114
 115       /* Size is fixed for the material attributes, for others will
 116        * be determined at runtime:
 117        */
 118       switch (i) {
 119       case MAT_ATTRIB_FRONT_SHININESS:
 120       case MAT_ATTRIB_BACK_SHININESS:
 121          size = 1;
 122          break;
 123       case MAT_ATTRIB_FRONT_INDEXES:
 124       case MAT_ATTRIB_BACK_INDEXES:
 125          size = 3;
 126          break;
 127       default:
 128          size = 4;
 129          break;
 130       }
 131
 132       init_array(ctx, cl, size, ctx->Light.Material.Attrib[i]);
 133    }
 134 }
 135
 136 static void
 137 vbo_draw_indirect_prims(struct gl_context *ctx,
 138                         GLuint mode,
 139                         struct gl_buffer_object *indirect_data,
 140                         GLsizeiptr indirect_offset,
 141                         unsigned draw_count,
 142                         unsigned stride,
 143                         struct gl_buffer_object *indirect_params,
 144                         GLsizeiptr indirect_params_offset,
 145                         const struct _mesa_index_buffer *ib)
 146 {
 147    struct vbo_context *vbo = vbo_context(ctx);
 148    struct _mesa_prim *prim;
 149    GLsizei i;
 150
 151    prim = calloc(draw_count, sizeof(*prim));
 152    if (prim == NULL) {
 153       _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s",
 154                   (draw_count > 1) ? "Multi" : "",
 155                   ib ? "Elements" : "Arrays",
 156                   indirect_params ? "CountARB" : "");
 157       return;
 158    }
 159
 160    prim[0].begin = 1;
 161    prim[draw_count - 1].end = 1;
 162    for (i = 0; i < draw_count; ++i, indirect_offset += stride) {
 163       prim[i].mode = mode;
 164       prim[i].indexed = !!ib;
 165       prim[i].indirect_offset = indirect_offset;
 166       prim[i].is_indirect = 1;
 167       prim[i].draw_id = i;
 168    }
 169
 170    vbo->draw_prims(ctx, prim, draw_count,
 171                    ib, false, 0, ~0,
 172                    NULL, 0,
 173                    ctx->DrawIndirectBuffer);
 174
 175    free(prim);
 176 }
 177
 178
 179 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 180 {
 181    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 182
 183    ctx->vbo_context = vbo;
 184
 185    /* Initialize the arrayelt helper
 186     */
 187    if (!ctx->aelt_context &&
 188        !_ae_create_context( ctx )) {
 189       return GL_FALSE;
 190    }
 191
 192    init_legacy_currval( ctx );
 193    init_generic_currval( ctx );
 194    init_mat_currval( ctx );
 195    vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims);
 196
 197    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 198     * of vertex program active.
 199     */
 200    {
 201       GLuint i;
 202
 203       /* identity mapping */
 204       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
 205          vbo->map_vp_none[i] = i;
 206       /* map material attribs to generic slots */
 207       for (i = 0; i < MAT_ATTRIB_MAX; i++)
 208          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 209             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 210
 211       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
 212          vbo->map_vp_arb[i] = i;
 213    }
 214
 215
 216    /* Hook our functions into exec and compile dispatch tables.  These
 217     * will pretty much be permanently installed, which means that the
 218     * vtxfmt mechanism can be removed now.
 219     */
 220    vbo_exec_init( ctx );
 221    if (ctx->API == API_OPENGL_COMPAT)
 222       vbo_save_init( ctx );
 223
 224    _math_init_eval();
 225
 226    return GL_TRUE;
 227 }
 228
 229
 230 void _vbo_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
 231 {
 232    vbo_exec_invalidate_state(ctx, new_state);
 233 }
 234
 235
 236 void _vbo_DestroyContext( struct gl_context *ctx )
 237 {
 238    struct vbo_context *vbo = vbo_context(ctx);
 239
 240    if (ctx->aelt_context) {
 241       _ae_destroy_context( ctx );
 242       ctx->aelt_context = NULL;
 243    }
 244
 245    if (vbo) {
 246       GLuint i;
 247
 248       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 249          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 250       }
 251
 252       vbo_exec_destroy(ctx);
 253       if (ctx->API == API_OPENGL_COMPAT)
 254          vbo_save_destroy(ctx);
 255       free(vbo);
 256       ctx->vbo_context = NULL;
 257    }
 258 }
 259
 260
 261 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 262 {
 263    struct vbo_context *vbo = vbo_context(ctx);
 264    vbo->draw_prims = func;
 265 }
 266
 267
 268 void vbo_set_indirect_draw_func(struct gl_context *ctx,
 269                                 vbo_indirect_draw_func func)
 270 {
 271    struct vbo_context *vbo = vbo_context(ctx);
 272    vbo->draw_indirect_prims = func;
 273 }