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