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/mtypes.h"
  34 #include "main/macros.h"
  35 #include "main/light.h"
  36 #include "main/state.h"
  37
  38 #include "vbo_context.h"
  39
  40
  41 /*
  42  * After playback, copy everything but the position from the
  43  * last vertex to the saved state
  44  */
  45 static void _playback_copy_to_current( GLcontext *ctx,
  46                                        const struct vbo_save_vertex_list *node )
  47 {
  48    struct vbo_context *vbo = vbo_context(ctx);
  49    GLfloat vertex[VBO_ATTRIB_MAX * 4];
  50    GLfloat *data;
  51    GLuint i, offset;
  52
  53    if (node->current_size == 0)
  54       return;
  55
  56    if (node->current_data) {
  57       data = node->current_data;
  58    }
  59    else {
  60       data = vertex;
  61
  62       if (node->count)
  63          offset = (node->buffer_offset +
  64                    (node->count-1) * node->vertex_size * sizeof(GLfloat));
  65       else
  66          offset = node->buffer_offset;
  67
  68       ctx->Driver.GetBufferSubData( ctx, 0, offset,
  69                                     node->vertex_size * sizeof(GLfloat),
  70                                     data, node->vertex_store->bufferobj );
  71
  72       data += node->attrsz[0]; /* skip vertex position */
  73    }
  74
  75    for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {
  76       if (node->attrsz[i]) {
  77          GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;
  78          GLfloat tmp[4];
  79
  80          COPY_CLEAN_4V(tmp,
  81                        node->attrsz[i],
  82                        data);
  83
  84          if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0)
  85          {
  86             memcpy(current, tmp, 4 * sizeof(GLfloat));
  87
  88             vbo->currval[i].Size = node->attrsz[i];
  89
  90             if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
  91                 i <= VBO_ATTRIB_LAST_MATERIAL)
  92                ctx->NewState |= _NEW_LIGHT;
  93
  94             ctx->NewState |= _NEW_CURRENT_ATTRIB;
  95          }
  96
  97          data += node->attrsz[i];
  98       }
  99    }
 100
 101    /* Colormaterial -- this kindof sucks.
 102     */
 103    if (ctx->Light.ColorMaterialEnabled) {
 104       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 105    }
 106
 107    /* CurrentExecPrimitive
 108     */
 109    if (node->prim_count) {
 110       const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];
 111       if (prim->end)
 112          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 113       else
 114          ctx->Driver.CurrentExecPrimitive = prim->mode;
 115    }
 116 }
 117
 118
 119
 120 /* Treat the vertex storage as a VBO, define vertex arrays pointing
 121  * into it:
 122  */
 123 static void vbo_bind_vertex_list( GLcontext *ctx,
 124                                    const struct vbo_save_vertex_list *node )
 125 {
 126    struct vbo_context *vbo = vbo_context(ctx);
 127    struct vbo_save_context *save = &vbo->save;
 128    struct gl_client_array *arrays = save->arrays;
 129    GLuint buffer_offset = node->buffer_offset;
 130    const GLuint *map;
 131    GLuint attr;
 132    GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */
 133    GLbitfield varying_inputs = 0x0;
 134
 135    memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
 136
 137    /* Install the default (ie Current) attributes first, then overlay
 138     * all active ones.
 139     */
 140    switch (get_program_mode(ctx)) {
 141    case VP_NONE:
 142       for (attr = 0; attr < 16; attr++) {
 143          save->inputs[attr] = &vbo->legacy_currval[attr];
 144       }
 145       for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
 146          save->inputs[attr + 16] = &vbo->mat_currval[attr];
 147       }
 148       map = vbo->map_vp_none;
 149       break;
 150    case VP_NV:
 151    case VP_ARB:
 152       /* The aliasing of attributes for NV vertex programs has already
 153        * occurred.  NV vertex programs cannot access material values,
 154        * nor attributes greater than VERT_ATTRIB_TEX7.
 155        */
 156       for (attr = 0; attr < 16; attr++) {
 157          save->inputs[attr] = &vbo->legacy_currval[attr];
 158          save->inputs[attr + 16] = &vbo->generic_currval[attr];
 159       }
 160       map = vbo->map_vp_arb;
 161
 162       /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
 163        * In that case we effectively need to route the data from
 164        * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
 165        */
 166       if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&
 167           (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {
 168          save->inputs[16] = save->inputs[0];
 169          node_attrsz[16] = node_attrsz[0];
 170          node_attrsz[0] = 0;
 171       }
 172       break;
 173    default:
 174       assert(0);
 175    }
 176
 177    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 178       GLuint src = map[attr];
 179
 180       if (node_attrsz[src]) {
 181          /* override the default array set above */
 182          save->inputs[attr] = &arrays[attr];
 183
 184          arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;
 185          arrays[attr].Size = node->attrsz[src];
 186          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 187          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 188          arrays[attr].Type = GL_FLOAT;
 189          arrays[attr].Format = GL_RGBA;
 190          arrays[attr].Enabled = 1;
 191          _mesa_reference_buffer_object(ctx,
 192                                        &arrays[attr].BufferObj,
 193                                        node->vertex_store->bufferobj);
 194          arrays[attr]._MaxElement = node->count; /* ??? */
 195
 196          assert(arrays[attr].BufferObj->Name);
 197
 198          buffer_offset += node->attrsz[src] * sizeof(GLfloat);
 199          varying_inputs |= 1<<attr;
 200       }
 201    }
 202
 203    _mesa_set_varying_vp_inputs( ctx, varying_inputs );
 204 }
 205
 206 static void vbo_save_loopback_vertex_list( GLcontext *ctx,
 207                                            const struct vbo_save_vertex_list *list )
 208 {
 209    const char *buffer = ctx->Driver.MapBuffer(ctx,
 210                                               GL_ARRAY_BUFFER_ARB,
 211                                               GL_READ_ONLY, /* ? */
 212                                                list->vertex_store->bufferobj);
 213
 214    vbo_loopback_vertex_list( ctx,
 215                              (const GLfloat *)(buffer + list->buffer_offset),
 216                              list->attrsz,
 217                              list->prim,
 218                              list->prim_count,
 219                              list->wrap_count,
 220                              list->vertex_size);
 221
 222    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 223                            list->vertex_store->bufferobj);
 224 }
 225
 226
 227 /**
 228  * Execute the buffer and save copied verts.
 229  */
 230 void vbo_save_playback_vertex_list( GLcontext *ctx, void *data )
 231 {
 232    const struct vbo_save_vertex_list *node = (const struct vbo_save_vertex_list *) data;
 233    struct vbo_save_context *save = &vbo_context(ctx)->save;
 234
 235    FLUSH_CURRENT(ctx, 0);
 236
 237    if (node->prim_count > 0 && node->count > 0) {
 238
 239       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 240           node->prim[0].begin) {
 241
 242          /* Degenerate case: list is called inside begin/end pair and
 243           * includes operations such as glBegin or glDrawArrays.
 244           */
 245          if (0)
 246             _mesa_printf("displaylist recursive begin");
 247
 248          vbo_save_loopback_vertex_list( ctx, node );
 249          return;
 250       }
 251       else if (save->replay_flags) {
 252          /* Various degnerate cases: translate into immediate mode
 253           * calls rather than trying to execute in place.
 254           */
 255          vbo_save_loopback_vertex_list( ctx, node );
 256          return;
 257       }
 258
 259       if (ctx->NewState)
 260          _mesa_update_state( ctx );
 261
 262       /* XXX also need to check if shader enabled, but invalid */
 263       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 264           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 265          _mesa_error(ctx, GL_INVALID_OPERATION,
 266                      "glBegin (invalid vertex/fragment program)");
 267          return;
 268       }
 269
 270       vbo_bind_vertex_list( ctx, node );
 271
 272       /* Again...
 273        */
 274       if (ctx->NewState)
 275          _mesa_update_state( ctx );
 276
 277       vbo_context(ctx)->draw_prims( ctx,
 278                                     save->inputs,
 279                                     node->prim,
 280                                     node->prim_count,
 281                                     NULL,
 282                                     0,  /* Node is a VBO, so this is ok */
 283                                     node->count - 1);
 284    }
 285
 286    /* Copy to current?
 287     */
 288    _playback_copy_to_current( ctx, node );
 289 }