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 static void
  46 copy_vao(struct gl_context *ctx, const struct gl_vertex_array_object *vao,
  47          GLbitfield mask, GLbitfield state, int shift, fi_type **data)
  48 {
  49    struct vbo_context *vbo = vbo_context(ctx);
  50
  51    mask &= vao->_Enabled;
  52    while (mask) {
  53       const int i = u_bit_scan(&mask);
  54       const struct gl_array_attributes *attrib = &vao->VertexAttrib[i];
  55       struct gl_array_attributes *currval = &vbo->current[shift + i];
  56       const GLubyte size = attrib->Size;
  57       const GLenum16 type = attrib->Type;
  58       fi_type tmp[4];
  59
  60       COPY_CLEAN_4V_TYPE_AS_UNION(tmp, size, *data, type);
  61
  62       if (type != currval->Type ||
  63           memcmp(currval->Ptr, tmp, 4 * sizeof(GLfloat)) != 0) {
  64          memcpy((fi_type*)currval->Ptr, tmp, 4 * sizeof(GLfloat));
  65
  66          currval->Size = size;
  67          currval->_ElementSize = size * sizeof(GLfloat);
  68          currval->Type = type;
  69          currval->Integer = vbo_attrtype_to_integer_flag(type);
  70          currval->Doubles = vbo_attrtype_to_double_flag(type);
  71          currval->Normalized = GL_FALSE;
  72          currval->Format = GL_RGBA;
  73
  74          ctx->NewState |= state;
  75       }
  76
  77       *data += size;
  78    }
  79 }
  80
  81 /**
  82  * After playback, copy everything but the position from the
  83  * last vertex to the saved state
  84  */
  85 static void
  86 playback_copy_to_current(struct gl_context *ctx,
  87                          const struct vbo_save_vertex_list *node)
  88 {
  89    if (!node->current_data)
  90       return;
  91
  92    fi_type *data = node->current_data;
  93    /* Copy conventional attribs and generics except pos */
  94    copy_vao(ctx, node->VAO[VP_MODE_SHADER], ~VERT_BIT_POS & VERT_BIT_ALL,
  95             _NEW_CURRENT_ATTRIB, 0, &data);
  96    /* Copy materials */
  97    copy_vao(ctx, node->VAO[VP_MODE_FF], VERT_BIT_MAT_ALL,
  98             _NEW_CURRENT_ATTRIB | _NEW_LIGHT, VBO_MATERIAL_SHIFT, &data);
  99
 100    /* Colormaterial -- this kindof sucks.
 101     */
 102    if (ctx->Light.ColorMaterialEnabled) {
 103       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 104    }
 105
 106    /* CurrentExecPrimitive
 107     */
 108    if (node->prim_count) {
 109       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 110       if (prim->end)
 111          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 112       else
 113          ctx->Driver.CurrentExecPrimitive = prim->mode;
 114    }
 115 }
 116
 117
 118
 119 /**
 120  * Set the appropriate VAO to draw.
 121  */
 122 static void
 123 bind_vertex_list(struct gl_context *ctx,
 124                  const struct vbo_save_vertex_list *node)
 125 {
 126    const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
 127    _mesa_set_draw_vao(ctx, node->VAO[mode], _vbo_get_vao_filter(mode));
 128 }
 129
 130
 131 static void
 132 loopback_vertex_list(struct gl_context *ctx,
 133                      const struct vbo_save_vertex_list *list)
 134 {
 135    struct gl_buffer_object *bo = list->VAO[0]->BufferBinding[0].BufferObj;
 136    ctx->Driver.MapBufferRange(ctx, 0, bo->Size, GL_MAP_READ_BIT, /* ? */
 137                               bo, MAP_INTERNAL);
 138
 139    /* Note that the range of referenced vertices must be mapped already */
 140    _vbo_loopback_vertex_list(ctx, list);
 141
 142    ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
 143 }
 144
 145
 146 /**
 147  * Execute the buffer and save copied verts.
 148  * This is called from the display list code when executing
 149  * a drawing command.
 150  */
 151 void
 152 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 153 {
 154    const struct vbo_save_vertex_list *node =
 155       (const struct vbo_save_vertex_list *) data;
 156    struct vbo_context *vbo = vbo_context(ctx);
 157    struct vbo_save_context *save = &vbo->save;
 158    GLboolean remap_vertex_store = GL_FALSE;
 159
 160    if (save->vertex_store && save->vertex_store->buffer_map) {
 161       /* The vertex store is currently mapped but we're about to replay
 162        * a display list.  This can happen when a nested display list is
 163        * being build with GL_COMPILE_AND_EXECUTE.
 164        * We never want to have mapped vertex buffers when we're drawing.
 165        * Unmap the vertex store, execute the list, then remap the vertex
 166        * store.
 167        */
 168       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 169       remap_vertex_store = GL_TRUE;
 170    }
 171
 172    FLUSH_CURRENT(ctx, 0);
 173
 174    if (node->prim_count > 0) {
 175
 176       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 177          /* Error: we're about to begin a new primitive but we're already
 178           * inside a glBegin/End pair.
 179           */
 180          _mesa_error(ctx, GL_INVALID_OPERATION,
 181                      "draw operation inside glBegin/End");
 182          goto end;
 183       }
 184       else if (save->replay_flags) {
 185          /* Various degenerate cases: translate into immediate mode
 186           * calls rather than trying to execute in place.
 187           */
 188          loopback_vertex_list(ctx, node);
 189
 190          goto end;
 191       }
 192
 193       bind_vertex_list(ctx, node);
 194
 195       /* Need that at least one time. */
 196       if (ctx->NewState)
 197          _mesa_update_state(ctx);
 198
 199       /* XXX also need to check if shader enabled, but invalid */
 200       if ((ctx->VertexProgram.Enabled &&
 201            !_mesa_arb_vertex_program_enabled(ctx)) ||
 202           (ctx->FragmentProgram.Enabled &&
 203            !_mesa_arb_fragment_program_enabled(ctx))) {
 204          _mesa_error(ctx, GL_INVALID_OPERATION,
 205                      "glBegin (invalid vertex/fragment program)");
 206          return;
 207       }
 208
 209       assert(ctx->NewState == 0);
 210
 211       if (node->vertex_count > 0) {
 212          GLuint min_index = _vbo_save_get_min_index(node);
 213          GLuint max_index = _vbo_save_get_max_index(node);
 214          ctx->Driver.Draw(ctx, node->prims, node->prim_count, NULL, GL_TRUE,
 215                           min_index, max_index, NULL, 0, NULL);
 216       }
 217    }
 218
 219    /* Copy to current?
 220     */
 221    playback_copy_to_current(ctx, node);
 222
 223 end:
 224    if (remap_vertex_store) {
 225       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 226    }
 227 }