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