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/macros.h"
  36 #include "main/light.h"
  37 #include "main/state.h"
  38 #include "main/varray.h"
  39 #include "util/bitscan.h"
  40
  41 #include "vbo_private.h"
  42
  43
  44 static void
  45 copy_vao(struct gl_context *ctx, const struct gl_vertex_array_object *vao,
  46          GLbitfield mask, GLbitfield state, int shift, fi_type **data)
  47 {
  48    struct vbo_context *vbo = vbo_context(ctx);
  49
  50    mask &= vao->_Enabled;
  51    while (mask) {
  52       const int i = u_bit_scan(&mask);
  53       const struct gl_array_attributes *attrib = &vao->VertexAttrib[i];
  54       struct gl_array_attributes *currval = &vbo->current[shift + i];
  55       const GLubyte size = attrib->Size;
  56       const GLenum16 type = attrib->Type;
  57       fi_type tmp[4];
  58
  59       COPY_CLEAN_4V_TYPE_AS_UNION(tmp, size, *data, type);
  60
  61       if (type != currval->Type ||
  62           memcmp(currval->Ptr, tmp, 4 * sizeof(GLfloat)) != 0) {
  63          memcpy((fi_type*)currval->Ptr, tmp, 4 * sizeof(GLfloat));
  64
  65          currval->Size = size;
  66          currval->_ElementSize = size * sizeof(GLfloat);
  67          currval->Type = type;
  68          currval->Integer = vbo_attrtype_to_integer_flag(type);
  69          currval->Doubles = vbo_attrtype_to_double_flag(type);
  70          currval->Normalized = GL_FALSE;
  71          currval->Format = GL_RGBA;
  72
  73          ctx->NewState |= state;
  74       }
  75
  76       *data += size;
  77    }
  78 }
  79
  80 /**
  81  * After playback, copy everything but the position from the
  82  * last vertex to the saved state
  83  */
  84 static void
  85 playback_copy_to_current(struct gl_context *ctx,
  86                          const struct vbo_save_vertex_list *node)
  87 {
  88    if (!node->current_data)
  89       return;
  90
  91    fi_type *data = node->current_data;
  92    /* Copy conventional attribs and generics except pos */
  93    copy_vao(ctx, node->VAO[VP_MODE_SHADER], ~VERT_BIT_POS & VERT_BIT_ALL,
  94             _NEW_CURRENT_ATTRIB, 0, &data);
  95    /* Copy materials */
  96    copy_vao(ctx, node->VAO[VP_MODE_FF], VERT_BIT_MAT_ALL,
  97             _NEW_CURRENT_ATTRIB | _NEW_LIGHT, VBO_MATERIAL_SHIFT, &data);
  98
  99    /* Colormaterial -- this kindof sucks.
 100     */
 101    if (ctx->Light.ColorMaterialEnabled) {
 102       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 103    }
 104
 105    /* CurrentExecPrimitive
 106     */
 107    if (node->prim_count) {
 108       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 109       if (prim->end)
 110          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 111       else
 112          ctx->Driver.CurrentExecPrimitive = prim->mode;
 113    }
 114 }
 115
 116
 117
 118 /**
 119  * Set the appropriate VAO to draw.
 120  */
 121 static void
 122 bind_vertex_list(struct gl_context *ctx,
 123                  const struct vbo_save_vertex_list *node)
 124 {
 125    const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
 126    _mesa_set_draw_vao(ctx, node->VAO[mode], _vbo_get_vao_filter(mode));
 127 }
 128
 129
 130 static void
 131 loopback_vertex_list(struct gl_context *ctx,
 132                      const struct vbo_save_vertex_list *list)
 133 {
 134    struct gl_buffer_object *bo = list->VAO[0]->BufferBinding[0].BufferObj;
 135    ctx->Driver.MapBufferRange(ctx, 0, bo->Size, GL_MAP_READ_BIT, /* ? */
 136                               bo, MAP_INTERNAL);
 137
 138    /* Note that the range of referenced vertices must be mapped already */
 139    _vbo_loopback_vertex_list(ctx, list);
 140
 141    ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
 142 }
 143
 144
 145 /**
 146  * Execute the buffer and save copied verts.
 147  * This is called from the display list code when executing
 148  * a drawing command.
 149  */
 150 void
 151 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 152 {
 153    const struct vbo_save_vertex_list *node =
 154       (const struct vbo_save_vertex_list *) data;
 155    struct vbo_context *vbo = vbo_context(ctx);
 156    struct vbo_save_context *save = &vbo->save;
 157    GLboolean remap_vertex_store = GL_FALSE;
 158
 159    if (save->vertex_store && save->vertex_store->buffer_map) {
 160       /* The vertex store is currently mapped but we're about to replay
 161        * a display list.  This can happen when a nested display list is
 162        * being build with GL_COMPILE_AND_EXECUTE.
 163        * We never want to have mapped vertex buffers when we're drawing.
 164        * Unmap the vertex store, execute the list, then remap the vertex
 165        * store.
 166        */
 167       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 168       remap_vertex_store = GL_TRUE;
 169    }
 170
 171    FLUSH_CURRENT(ctx, 0);
 172
 173    if (node->prim_count > 0) {
 174
 175       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 176          /* Error: we're about to begin a new primitive but we're already
 177           * inside a glBegin/End pair.
 178           */
 179          _mesa_error(ctx, GL_INVALID_OPERATION,
 180                      "draw operation inside glBegin/End");
 181          goto end;
 182       }
 183       else if (save->replay_flags) {
 184          /* Various degenerate cases: translate into immediate mode
 185           * calls rather than trying to execute in place.
 186           */
 187          loopback_vertex_list(ctx, node);
 188
 189          goto end;
 190       }
 191
 192       bind_vertex_list(ctx, node);
 193
 194       /* Need that at least one time. */
 195       if (ctx->NewState)
 196          _mesa_update_state(ctx);
 197
 198       /* XXX also need to check if shader enabled, but invalid */
 199       if ((ctx->VertexProgram.Enabled &&
 200            !_mesa_arb_vertex_program_enabled(ctx)) ||
 201           (ctx->FragmentProgram.Enabled &&
 202            !_mesa_arb_fragment_program_enabled(ctx))) {
 203          _mesa_error(ctx, GL_INVALID_OPERATION,
 204                      "glBegin (invalid vertex/fragment program)");
 205          return;
 206       }
 207
 208       assert(ctx->NewState == 0);
 209
 210       if (node->vertex_count > 0) {
 211          GLuint min_index = _vbo_save_get_min_index(node);
 212          GLuint max_index = _vbo_save_get_max_index(node);
 213          ctx->Driver.Draw(ctx, node->prims, node->prim_count, NULL, GL_TRUE,
 214                           min_index, max_index, NULL, 0, NULL);
 215       }
 216    }
 217
 218    /* Copy to current?
 219     */
 220    playback_copy_to_current(ctx, node);
 221
 222 end:
 223    if (remap_vertex_store) {
 224       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 225    }
 226 }