src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  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
  25 /* Author:
  26  *    Keith Whitwell <keithw@vmware.com>
  27  */
  28
  29 #include <stdbool.h>
  30 #include "main/arrayobj.h"
  31 #include "main/glheader.h"
  32 #include "main/bufferobj.h"
  33 #include "main/context.h"
  34 #include "main/imports.h"
  35 #include "main/mtypes.h"
  36 #include "main/macros.h"
  37 #include "main/light.h"
  38 #include "main/state.h"
  39 #include "main/varray.h"
  40 #include "util/bitscan.h"
  41
  42 #include "vbo_private.h"
  43
  44
  45 /**
  46  * After playback, copy everything but the position from the
  47  * last vertex to the saved state
  48  */
  49 static void
  50 playback_copy_to_current(struct gl_context *ctx,
  51                          const struct vbo_save_vertex_list *node)
  52 {
  53    struct vbo_context *vbo = vbo_context(ctx);
  54    fi_type vertex[VBO_ATTRIB_MAX * 4];
  55    fi_type *data;
  56    GLbitfield64 mask;
  57
  58    if (node->current_size == 0)
  59       return;
  60
  61    if (node->current_data) {
  62       data = node->current_data;
  63    }
  64    else {
  65       /* Position of last vertex */
  66       const GLuint pos = node->vertex_count > 0 ? node->vertex_count - 1 : 0;
  67       /* Offset to last vertex in the vertex buffer */
  68       const GLuint offset = node->buffer_offset
  69          + pos * node->vertex_size * sizeof(GLfloat);
  70
  71       data = vertex;
  72
  73       ctx->Driver.GetBufferSubData(ctx, offset,
  74                                    node->vertex_size * sizeof(GLfloat),
  75                                    data, node->vertex_store->bufferobj);
  76
  77       data += node->attrsz[0]; /* skip vertex position */
  78    }
  79
  80    mask = node->enabled & (~BITFIELD64_BIT(VBO_ATTRIB_POS));
  81    while (mask) {
  82       const int i = u_bit_scan64(&mask);
  83       fi_type *current = (fi_type *)vbo->currval[i].Ptr;
  84       fi_type tmp[4];
  85       assert(node->attrsz[i]);
  86
  87       COPY_CLEAN_4V_TYPE_AS_UNION(tmp,
  88                                   node->attrsz[i],
  89                                   data,
  90                                   node->attrtype[i]);
  91
  92       if (node->attrtype[i] != vbo->currval[i].Type ||
  93           memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
  94          memcpy(current, tmp, 4 * sizeof(GLfloat));
  95
  96          vbo->currval[i].Size = node->attrsz[i];
  97          vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
  98          vbo->currval[i].Type = node->attrtype[i];
  99          vbo->currval[i].Integer =
 100             vbo_attrtype_to_integer_flag(node->attrtype[i]);
 101
 102          if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
 103              i <= VBO_ATTRIB_LAST_MATERIAL)
 104             ctx->NewState |= _NEW_LIGHT;
 105
 106          ctx->NewState |= _NEW_CURRENT_ATTRIB;
 107       }
 108
 109       data += node->attrsz[i];
 110    }
 111
 112    /* Colormaterial -- this kindof sucks.
 113     */
 114    if (ctx->Light.ColorMaterialEnabled) {
 115       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 116    }
 117
 118    /* CurrentExecPrimitive
 119     */
 120    if (node->prim_count) {
 121       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 122       if (prim->end)
 123          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 124       else
 125          ctx->Driver.CurrentExecPrimitive = prim->mode;
 126    }
 127 }
 128
 129
 130
 131 /**
 132  * Set the appropriate VAO to draw.
 133  */
 134 static void
 135 bind_vertex_list(struct gl_context *ctx,
 136                  const struct vbo_save_vertex_list *node)
 137 {
 138    const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
 139    _mesa_set_draw_vao(ctx, node->VAO[mode], _vbo_get_vao_filter(mode));
 140 }
 141
 142
 143 static void
 144 loopback_vertex_list(struct gl_context *ctx,
 145                      const struct vbo_save_vertex_list *list)
 146 {
 147    struct gl_buffer_object *bo = list->VAO[0]->BufferBinding[0].BufferObj;
 148    ctx->Driver.MapBufferRange(ctx, 0, bo->Size, GL_MAP_READ_BIT, /* ? */
 149                               bo, MAP_INTERNAL);
 150
 151    /* Note that the range of referenced vertices must be mapped already */
 152    _vbo_loopback_vertex_list(ctx, list);
 153
 154    ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
 155 }
 156
 157
 158 /**
 159  * Execute the buffer and save copied verts.
 160  * This is called from the display list code when executing
 161  * a drawing command.
 162  */
 163 void
 164 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 165 {
 166    const struct vbo_save_vertex_list *node =
 167       (const struct vbo_save_vertex_list *) data;
 168    struct vbo_context *vbo = vbo_context(ctx);
 169    struct vbo_save_context *save = &vbo->save;
 170    GLboolean remap_vertex_store = GL_FALSE;
 171
 172    if (save->vertex_store && save->vertex_store->buffer_map) {
 173       /* The vertex store is currently mapped but we're about to replay
 174        * a display list.  This can happen when a nested display list is
 175        * being build with GL_COMPILE_AND_EXECUTE.
 176        * We never want to have mapped vertex buffers when we're drawing.
 177        * Unmap the vertex store, execute the list, then remap the vertex
 178        * store.
 179        */
 180       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 181       remap_vertex_store = GL_TRUE;
 182    }
 183
 184    FLUSH_CURRENT(ctx, 0);
 185
 186    if (node->prim_count > 0) {
 187
 188       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 189          /* Error: we're about to begin a new primitive but we're already
 190           * inside a glBegin/End pair.
 191           */
 192          _mesa_error(ctx, GL_INVALID_OPERATION,
 193                      "draw operation inside glBegin/End");
 194          goto end;
 195       }
 196       else if (save->replay_flags) {
 197          /* Various degenerate cases: translate into immediate mode
 198           * calls rather than trying to execute in place.
 199           */
 200          loopback_vertex_list(ctx, node);
 201
 202          goto end;
 203       }
 204
 205       bind_vertex_list(ctx, node);
 206
 207       /* Need that at least one time. */
 208       if (ctx->NewState)
 209          _mesa_update_state(ctx);
 210
 211       /* XXX also need to check if shader enabled, but invalid */
 212       if ((ctx->VertexProgram.Enabled &&
 213            !_mesa_arb_vertex_program_enabled(ctx)) ||
 214           (ctx->FragmentProgram.Enabled &&
 215            !_mesa_arb_fragment_program_enabled(ctx))) {
 216          _mesa_error(ctx, GL_INVALID_OPERATION,
 217                      "glBegin (invalid vertex/fragment program)");
 218          return;
 219       }
 220
 221       /* Finally update the inputs array */
 222       _vbo_update_inputs(ctx, &vbo->draw_arrays);
 223       _mesa_set_drawing_arrays(ctx, vbo->draw_arrays.inputs);
 224
 225       assert(ctx->NewState == 0);
 226
 227       if (node->vertex_count > 0) {
 228          GLuint min_index = node->start_vertex;
 229          GLuint max_index = min_index + node->vertex_count - 1;
 230          vbo->draw_prims(ctx,
 231                          node->prims,
 232                          node->prim_count,
 233                          NULL,
 234                          GL_TRUE,
 235                          min_index, max_index,
 236                          NULL, 0, NULL);
 237       }
 238    }
 239
 240    /* Copy to current?
 241     */
 242    playback_copy_to_current(ctx, node);
 243
 244 end:
 245    if (remap_vertex_store) {
 246       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 247    }
 248 }