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
44static void
45copy_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->Format.Size;
56      const GLenum16 type = attrib->Format.Type;
57      fi_type tmp[8];
58      int dmul = 1;
59
60      if (type == GL_DOUBLE ||
61          type == GL_UNSIGNED_INT64_ARB)
62         dmul = 2;
63
64      if (dmul == 2)
65         memcpy(tmp, *data, size * dmul * sizeof(GLfloat));
66      else
67         COPY_CLEAN_4V_TYPE_AS_UNION(tmp, size, *data, type);
68
69      if (type != currval->Format.Type ||
70          memcmp(currval->Ptr, tmp, 4 * sizeof(GLfloat) * dmul) != 0) {
71         memcpy((fi_type*)currval->Ptr, tmp, 4 * sizeof(GLfloat) * dmul);
72
73         vbo_set_vertex_format(&currval->Format, size, type);
74
75         ctx->NewState |= state;
76      }
77
78      *data += size;
79   }
80}
81
82/**
83 * After playback, copy everything but the position from the
84 * last vertex to the saved state
85 */
86static void
87playback_copy_to_current(struct gl_context *ctx,
88                         const struct vbo_save_vertex_list *node)
89{
90   if (!node->current_data)
91      return;
92
93   fi_type *data = node->current_data;
94   /* Copy conventional attribs and generics except pos */
95   copy_vao(ctx, node->VAO[VP_MODE_SHADER], ~VERT_BIT_POS & VERT_BIT_ALL,
96            _NEW_CURRENT_ATTRIB, 0, &data);
97   /* Copy materials */
98   copy_vao(ctx, node->VAO[VP_MODE_FF], VERT_BIT_MAT_ALL,
99            _NEW_CURRENT_ATTRIB | _NEW_LIGHT, VBO_MATERIAL_SHIFT, &data);
100
101   /* Colormaterial -- this kindof sucks.
102    */
103   if (ctx->Light.ColorMaterialEnabled) {
104      _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
105   }
106
107   /* CurrentExecPrimitive
108    */
109   if (node->prim_count) {
110      const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
111      if (prim->end)
112         ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
113      else
114         ctx->Driver.CurrentExecPrimitive = prim->mode;
115   }
116}
117
118
119
120/**
121 * Set the appropriate VAO to draw.
122 */
123static void
124bind_vertex_list(struct gl_context *ctx,
125                 const struct vbo_save_vertex_list *node)
126{
127   const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
128   _mesa_set_draw_vao(ctx, node->VAO[mode], _vbo_get_vao_filter(mode));
129}
130
131
132static void
133loopback_vertex_list(struct gl_context *ctx,
134                     const struct vbo_save_vertex_list *list)
135{
136   struct gl_buffer_object *bo = list->VAO[0]->BufferBinding[0].BufferObj;
137   ctx->Driver.MapBufferRange(ctx, 0, bo->Size, GL_MAP_READ_BIT, /* ? */
138                              bo, MAP_INTERNAL);
139
140   /* Note that the range of referenced vertices must be mapped already */
141   _vbo_loopback_vertex_list(ctx, list);
142
143   ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
144}
145
146
147/**
148 * Execute the buffer and save copied verts.
149 * This is called from the display list code when executing
150 * a drawing command.
151 */
152void
153vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
154{
155   const struct vbo_save_vertex_list *node =
156      (const struct vbo_save_vertex_list *) data;
157   struct vbo_context *vbo = vbo_context(ctx);
158   struct vbo_save_context *save = &vbo->save;
159   GLboolean remap_vertex_store = GL_FALSE;
160
161   if (save->vertex_store && save->vertex_store->buffer_map) {
162      /* The vertex store is currently mapped but we're about to replay
163       * a display list.  This can happen when a nested display list is
164       * being build with GL_COMPILE_AND_EXECUTE.
165       * We never want to have mapped vertex buffers when we're drawing.
166       * Unmap the vertex store, execute the list, then remap the vertex
167       * store.
168       */
169      vbo_save_unmap_vertex_store(ctx, save->vertex_store);
170      remap_vertex_store = GL_TRUE;
171   }
172
173   FLUSH_FOR_DRAW(ctx);
174
175   if (node->prim_count > 0) {
176
177      if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
178         /* Error: we're about to begin a new primitive but we're already
179          * inside a glBegin/End pair.
180          */
181         _mesa_error(ctx, GL_INVALID_OPERATION,
182                     "draw operation inside glBegin/End");
183         goto end;
184      }
185      else if (save->replay_flags) {
186         /* Various degenerate cases: translate into immediate mode
187          * calls rather than trying to execute in place.
188          */
189         loopback_vertex_list(ctx, node);
190
191         goto end;
192      }
193
194      bind_vertex_list(ctx, node);
195
196      /* Need that at least one time. */
197      if (ctx->NewState)
198         _mesa_update_state(ctx);
199
200      /* XXX also need to check if shader enabled, but invalid */
201      if ((ctx->VertexProgram.Enabled &&
202           !_mesa_arb_vertex_program_enabled(ctx)) ||
203          (ctx->FragmentProgram.Enabled &&
204           !_mesa_arb_fragment_program_enabled(ctx))) {
205         _mesa_error(ctx, GL_INVALID_OPERATION,
206                     "glBegin (invalid vertex/fragment program)");
207         return;
208      }
209
210      assert(ctx->NewState == 0);
211
212      if (node->vertex_count > 0) {
213         GLuint min_index = _vbo_save_get_min_index(node);
214         GLuint max_index = _vbo_save_get_max_index(node);
215         ctx->Driver.Draw(ctx, node->prims, node->prim_count, NULL, GL_TRUE,
216                          min_index, max_index, NULL, 0, NULL);
217      }
218   }
219
220   /* Copy to current?
221    */
222   playback_copy_to_current(ctx, node);
223
224end:
225   if (remap_vertex_store) {
226      save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
227   }
228}
229