src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 1999-2008  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
  25 /* Author:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  */
  28
  29 #include "main/glheader.h"
  30 #include "main/bufferobj.h"
  31 #include "main/context.h"
  32 #include "main/imports.h"
  33 #include "main/mfeatures.h"
  34 #include "main/mtypes.h"
  35 #include "main/macros.h"
  36 #include "main/light.h"
  37 #include "main/state.h"
  38
  39 #include "vbo_context.h"
  40
  41
  42 /**
  43  * After playback, copy everything but the position from the
  44  * last vertex to the saved state
  45  */
  46 static void
  47 _playback_copy_to_current(struct gl_context *ctx,
  48                           const struct vbo_save_vertex_list *node)
  49 {
  50    struct vbo_context *vbo = vbo_context(ctx);
  51    GLfloat vertex[VBO_ATTRIB_MAX * 4];
  52    GLfloat *data;
  53    GLuint i, offset;
  54
  55    if (node->current_size == 0)
  56       return;
  57
  58    if (node->current_data) {
  59       data = node->current_data;
  60    }
  61    else {
  62       data = vertex;
  63
  64       if (node->count)
  65          offset = (node->buffer_offset +
  66                    (node->count-1) * node->vertex_size * sizeof(GLfloat));
  67       else
  68          offset = node->buffer_offset;
  69
  70       ctx->Driver.GetBufferSubData( ctx, offset,
  71                                     node->vertex_size * sizeof(GLfloat),
  72                                     data, node->vertex_store->bufferobj );
  73
  74       data += node->attrsz[0]; /* skip vertex position */
  75    }
  76
  77    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  78       if (node->attrsz[i]) {
  79          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  80          GLfloat tmp[4];
  81
  82          COPY_CLEAN_4V(tmp,
  83                        node->attrsz[i],
  84                        data);
  85
  86          if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  87             memcpy(current, tmp, 4 * sizeof(GLfloat));
  88
  89             vbo->currval[i].Size = node->attrsz[i];
  90             assert(vbo->currval[i].Type == GL_FLOAT);
  91             vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  92
  93             if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  94                 i <= VBO_ATTRIB_LAST_MATERIAL)
  95                ctx->NewState |= _NEW_LIGHT;
  96
  97             ctx->NewState |= _NEW_CURRENT_ATTRIB;
  98          }
  99
 100          data += node->attrsz[i];
 101       }
 102    }
 103
 104    /* Colormaterial -- this kindof sucks.
 105     */
 106    if (ctx->Light.ColorMaterialEnabled) {
 107       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 108    }
 109
 110    /* CurrentExecPrimitive
 111     */
 112    if (node->prim_count) {
 113       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
 114       if (prim->end)
 115          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 116       else
 117          ctx->Driver.CurrentExecPrimitive = prim->mode;
 118    }
 119 }
 120
 121
 122
 123 /**
 124  * Treat the vertex storage as a VBO, define vertex arrays pointing
 125  * into it:
 126  */
 127 static void vbo_bind_vertex_list(struct gl_context *ctx,
 128                                  const struct vbo_save_vertex_list *node)
 129 {
 130    struct vbo_context *vbo = vbo_context(ctx);
 131    struct vbo_save_context *save = &vbo->save;
 132    struct gl_client_array *arrays = save->arrays;
 133    GLuint buffer_offset = node->buffer_offset;
 134    const GLuint *map;
 135    GLuint attr;
 136    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 137    GLbitfield64 varying_inputs = 0x0;
 138
 139    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 140
 141    /* Install the default (ie Current) attributes first, then overlay
 142     * all active ones.
 143     */
 144    switch (get_program_mode(ctx)) {
 145    case VP_NONE:
 146       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 147          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 148       }
 149       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 150          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 151             &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
 152       }
 153       map = vbo->map_vp_none;
 154       break;
 155    case VP_ARB:
 156       for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
 157          save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
 158       }
 159       for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
 160          save->inputs[VERT_ATTRIB_GENERIC(attr)] =
 161             &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
 162       }
 163       map = vbo->map_vp_arb;
 164
 165       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 166        * In that case we effectively need to route the data from
 167        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 168        */
 169       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 170           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 171          save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
 172          node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
 173          node_attrsz[0] = 0;
 174       }
 175       break;
 176    default:
 177       assert(0);
 178    }
 179
 180    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 181       const GLuint src = map[attr];
 182
 183       if (node_attrsz[src]) {
 184          /* override the default array set above */
 185          save->inputs[attr] = &arrays[attr];
 186
 187          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 188          arrays[attr].Size = node_attrsz[src];
 189          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 190          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 191          arrays[attr].Type = GL_FLOAT;
 192          arrays[attr].Format = GL_RGBA;
 193          arrays[attr].Enabled = 1;
 194          arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
 195          _mesa_reference_buffer_object(ctx,
 196                                        &arrays[attr].BufferObj,
 197                                        node->vertex_store->bufferobj);
 198          arrays[attr]._MaxElement = node->count; /* ??? */
 199
 200          assert(arrays[attr].BufferObj->Name);
 201
 202          buffer_offset += node_attrsz[src] * sizeof(GLfloat);
 203          varying_inputs |= VERT_BIT(attr);
 204       }
 205    }
 206
 207    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 208    ctx->NewDriverState |= ctx->DriverFlags.NewArray;
 209 }
 210
 211
 212 static void
 213 vbo_save_loopback_vertex_list(struct gl_context *ctx,
 214                               const struct vbo_save_vertex_list *list)
 215 {
 216    const char *buffer =
 217       ctx->Driver.MapBufferRange(ctx, 0,
 218                                  list->vertex_store->bufferobj->Size,
 219                                  GL_MAP_READ_BIT, /* ? */
 220                                  list->vertex_store->bufferobj);
 221
 222    vbo_loopback_vertex_list(ctx,
 223                             (const GLfloat *)(buffer + list->buffer_offset),
 224                             list->attrsz,
 225                             list->prim,
 226                             list->prim_count,
 227                             list->wrap_count,
 228                             list->vertex_size);
 229
 230    ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj);
 231 }
 232
 233
 234 /**
 235  * Execute the buffer and save copied verts.
 236  * This is called from the display list code when executing
 237  * a drawing command.
 238  */
 239 void
 240 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 241 {
 242    const struct vbo_save_vertex_list *node =
 243       (const struct vbo_save_vertex_list *) data;
 244    struct vbo_save_context *save = &vbo_context(ctx)->save;
 245    GLboolean remap_vertex_store = GL_FALSE;
 246
 247    if (save->vertex_store->buffer) {
 248       /* The vertex store is currently mapped but we're about to replay
 249        * a display list.  This can happen when a nested display list is
 250        * being build with GL_COMPILE_AND_EXECUTE.
 251        * We never want to have mapped vertex buffers when we're drawing.
 252        * Unmap the vertex store, execute the list, then remap the vertex
 253        * store.
 254        */
 255       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 256       remap_vertex_store = GL_TRUE;
 257    }
 258
 259    FLUSH_CURRENT(ctx, 0);
 260
 261    if (node->prim_count > 0) {
 262
 263       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 264           node->prim[0].begin) {
 265
 266          /* Degenerate case: list is called inside begin/end pair and
 267           * includes operations such as glBegin or glDrawArrays.
 268           */
 269          if (0)
 270             printf("displaylist recursive begin");
 271
 272          vbo_save_loopback_vertex_list( ctx, node );
 273
 274          goto end;
 275       }
 276       else if (save->replay_flags) {
 277          /* Various degnerate cases: translate into immediate mode
 278           * calls rather than trying to execute in place.
 279           */
 280          vbo_save_loopback_vertex_list( ctx, node );
 281
 282          goto end;
 283       }
 284
 285       if (ctx->NewState)
 286          _mesa_update_state( ctx );
 287
 288       /* XXX also need to check if shader enabled, but invalid */
 289       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 290           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 291          _mesa_error(ctx, GL_INVALID_OPERATION,
 292                      "glBegin (invalid vertex/fragment program)");
 293          return;
 294       }
 295
 296       vbo_bind_vertex_list( ctx, node );
 297
 298       vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
 299
 300       /* Again...
 301        */
 302       if (ctx->NewState)
 303          _mesa_update_state( ctx );
 304
 305       if (node->count > 0) {
 306          vbo_context(ctx)->draw_prims(ctx,
 307                                       node->prim,
 308                                       node->prim_count,
 309                                       NULL,
 310                                       GL_TRUE,
 311                                       0,    /* Node is a VBO, so this is ok */
 312                                       node->count - 1,
 313                                       NULL);
 314       }
 315    }
 316
 317    /* Copy to current?
 318     */
 319    _playback_copy_to_current( ctx, node );
 320
 321 end:
 322    if (remap_vertex_store) {
 323       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 324    }
 325 }