aboutsummaryrefslogtreecommitdiffstats
path: root/src/mesa/main/glthread_bufferobj.c
blob: b5df4569ac5ad55eeabd61510d64fd0428bb76fa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
/*
 * Copyright © 2012 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include "glthread_marshal.h"
#include "dispatch.h"

/** Tracks the current bindings for the vertex array and index array buffers.
 *
 * This is part of what we need to enable glthread on compat-GL contexts that
 * happen to use VBOs, without also supporting the full tracking of VBO vs
 * user vertex array bindings per attribute on each vertex array for
 * determining what to upload at draw call time.
 *
 * Note that GL core makes it so that a buffer binding with an invalid handle
 * in the "buffer" parameter will throw an error, and then a
 * glVertexAttribPointer() that followsmight not end up pointing at a VBO.
 * However, in GL core the draw call would throw an error as well, so we don't
 * really care if our tracking is wrong for this case -- we never need to
 * marshal user data for draw calls, and the unmarshal will just generate an
 * error or not as appropriate.
 *
 * For compatibility GL, we do need to accurately know whether the draw call
 * on the unmarshal side will dereference a user pointer or load data from a
 * VBO per vertex.  That would make it seem like we need to track whether a
 * "buffer" is valid, so that we can know when an error will be generated
 * instead of updating the binding.  However, compat GL has the ridiculous
 * feature that if you pass a bad name, it just gens a buffer object for you,
 * so we escape without having to know if things are valid or not.
 */
void
_mesa_glthread_BindBuffer(struct gl_context *ctx, GLenum target, GLuint buffer)
{
   struct glthread_state *glthread = ctx->GLThread;

   switch (target) {
   case GL_ARRAY_BUFFER:
      glthread->vertex_array_is_vbo = (buffer != 0);
      break;
   case GL_ELEMENT_ARRAY_BUFFER:
      /* The current element array buffer binding is actually tracked in the
       * vertex array object instead of the context, so this would need to
       * change on vertex array object updates.
       */
      glthread->CurrentVAO->IndexBufferIsUserPointer = buffer != 0;
      break;
   case GL_DRAW_INDIRECT_BUFFER:
      glthread->draw_indirect_buffer_is_vbo = buffer != 0;
      break;
   }
}


/* BufferData: marshalled asynchronously */
struct marshal_cmd_BufferData
{
   struct marshal_cmd_base cmd_base;
   GLuint target_or_name;
   GLsizeiptr size;
   GLenum usage;
   const GLvoid *data_external_mem;
   bool data_null; /* If set, no data follows for "data" */
   bool named;
   bool ext_dsa;
   /* Next size bytes are GLubyte data[size] */
};

void
_mesa_unmarshal_BufferData(struct gl_context *ctx,
                           const struct marshal_cmd_BufferData *cmd)
{
   const GLuint target_or_name = cmd->target_or_name;
   const GLsizei size = cmd->size;
   const GLenum usage = cmd->usage;
   const void *data;

   if (cmd->data_null)
      data = NULL;
   else if (!cmd->named && target_or_name == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD)
      data = cmd->data_external_mem;
   else
      data = (const void *) (cmd + 1);

   if (cmd->ext_dsa) {
      CALL_NamedBufferDataEXT(ctx->CurrentServerDispatch,
                              (target_or_name, size, data, usage));
   } else if (cmd->named) {
      CALL_NamedBufferData(ctx->CurrentServerDispatch,
                           (target_or_name, size, data, usage));
   } else {
      CALL_BufferData(ctx->CurrentServerDispatch,
                      (target_or_name, size, data, usage));
   }
}

void
_mesa_unmarshal_NamedBufferData(struct gl_context *ctx,
                                const struct marshal_cmd_NamedBufferData *cmd)
{
   unreachable("never used - all BufferData variants use DISPATCH_CMD_BufferData");
}

void
_mesa_unmarshal_NamedBufferDataEXT(struct gl_context *ctx,
                                   const struct marshal_cmd_NamedBufferDataEXT *cmd)
{
   unreachable("never used - all BufferData variants use DISPATCH_CMD_BufferData");
}

static void
_mesa_marshal_BufferData_merged(GLuint target_or_name, GLsizeiptr size,
                                const GLvoid *data, GLenum usage, bool named,
                                bool ext_dsa, const char *func)
{
   GET_CURRENT_CONTEXT(ctx);
   bool external_mem = !named &&
                       target_or_name == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD;
   bool copy_data = data && !external_mem;
   int cmd_size = sizeof(struct marshal_cmd_BufferData) + (copy_data ? size : 0);

   if (unlikely(size < 0 || size > INT_MAX || cmd_size < 0 ||
                cmd_size > MARSHAL_MAX_CMD_SIZE ||
                (named && target_or_name == 0))) {
      _mesa_glthread_finish_before(ctx, func);
      if (named) {
         CALL_NamedBufferData(ctx->CurrentServerDispatch,
                              (target_or_name, size, data, usage));
      } else {
         CALL_BufferData(ctx->CurrentServerDispatch,
                         (target_or_name, size, data, usage));
      }
      return;
   }

   struct marshal_cmd_BufferData *cmd =
      _mesa_glthread_allocate_command(ctx, DISPATCH_CMD_BufferData,
                                      cmd_size);

   cmd->target_or_name = target_or_name;
   cmd->size = size;
   cmd->usage = usage;
   cmd->data_null = !data;
   cmd->named = named;
   cmd->ext_dsa = ext_dsa;
   cmd->data_external_mem = data;

   if (copy_data) {
      char *variable_data = (char *) (cmd + 1);
      memcpy(variable_data, data, size);
   }
}

void GLAPIENTRY
_mesa_marshal_BufferData(GLenum target, GLsizeiptr size, const GLvoid * data,
                         GLenum usage)
{
   _mesa_marshal_BufferData_merged(target, size, data, usage, false, false,
                                   "BufferData");
}

void GLAPIENTRY
_mesa_marshal_NamedBufferData(GLuint buffer, GLsizeiptr size,
                              const GLvoid * data, GLenum usage)
{
   _mesa_marshal_BufferData_merged(buffer, size, data, usage, true, false,
                                   "NamedBufferData");
}

void GLAPIENTRY
_mesa_marshal_NamedBufferDataEXT(GLuint buffer, GLsizeiptr size,
                                 const GLvoid *data, GLenum usage)
{
   _mesa_marshal_BufferData_merged(buffer, size, data, usage, true, true,
                                   "NamedBufferDataEXT");
}


/* BufferSubData: marshalled asynchronously */
struct marshal_cmd_BufferSubData
{
   struct marshal_cmd_base cmd_base;
   GLenum target_or_name;
   GLintptr offset;
   GLsizeiptr size;
   bool named;
   bool ext_dsa;
   /* Next size bytes are GLubyte data[size] */
};

void
_mesa_unmarshal_BufferSubData(struct gl_context *ctx,
                              const struct marshal_cmd_BufferSubData *cmd)
{
   const GLenum target_or_name = cmd->target_or_name;
   const GLintptr offset = cmd->offset;
   const GLsizeiptr size = cmd->size;
   const void *data = (const void *) (cmd + 1);

   if (cmd->ext_dsa) {
      CALL_NamedBufferSubDataEXT(ctx->CurrentServerDispatch,
                                 (target_or_name, offset, size, data));
   } else if (cmd->named) {
      CALL_NamedBufferSubData(ctx->CurrentServerDispatch,
                              (target_or_name, offset, size, data));
   } else {
      CALL_BufferSubData(ctx->CurrentServerDispatch,
                         (target_or_name, offset, size, data));
   }
}

void
_mesa_unmarshal_NamedBufferSubData(struct gl_context *ctx,
                                   const struct marshal_cmd_NamedBufferSubData *cmd)
{
   unreachable("never used - all BufferSubData variants use DISPATCH_CMD_BufferSubData");
}

void
_mesa_unmarshal_NamedBufferSubDataEXT(struct gl_context *ctx,
                                      const struct marshal_cmd_NamedBufferSubDataEXT *cmd)
{
   unreachable("never used - all BufferSubData variants use DISPATCH_CMD_BufferSubData");
}

static void
_mesa_marshal_BufferSubData_merged(GLuint target_or_name, GLintptr offset,
                                   GLsizeiptr size, const GLvoid *data,
                                   bool named, bool ext_dsa, const char *func)
{
   GET_CURRENT_CONTEXT(ctx);
   size_t cmd_size = sizeof(struct marshal_cmd_BufferSubData) + size;

   if (unlikely(size < 0 || size > INT_MAX || cmd_size < 0 ||
                cmd_size > MARSHAL_MAX_CMD_SIZE || !data ||
                (named && target_or_name == 0))) {
      _mesa_glthread_finish_before(ctx, func);
      if (named) {
         CALL_NamedBufferSubData(ctx->CurrentServerDispatch,
                                 (target_or_name, offset, size, data));
      } else {
         CALL_BufferSubData(ctx->CurrentServerDispatch,
                            (target_or_name, offset, size, data));
      }
      return;
   }

   struct marshal_cmd_BufferSubData *cmd =
      _mesa_glthread_allocate_command(ctx, DISPATCH_CMD_BufferSubData,
                                      cmd_size);
   cmd->target_or_name = target_or_name;
   cmd->offset = offset;
   cmd->size = size;
   cmd->named = named;
   cmd->ext_dsa = ext_dsa;

   char *variable_data = (char *) (cmd + 1);
   memcpy(variable_data, data, size);
}

void GLAPIENTRY
_mesa_marshal_BufferSubData(GLenum target, GLintptr offset, GLsizeiptr size,
                            const GLvoid * data)
{
   _mesa_marshal_BufferSubData_merged(target, offset, size, data, false,
                                      false, "BufferSubData");
}

void GLAPIENTRY
_mesa_marshal_NamedBufferSubData(GLuint buffer, GLintptr offset,
                                 GLsizeiptr size, const GLvoid * data)
{
   _mesa_marshal_BufferSubData_merged(buffer, offset, size, data, true,
                                      false, "NamedBufferSubData");
}

void GLAPIENTRY
_mesa_marshal_NamedBufferSubDataEXT(GLuint buffer, GLintptr offset,
                                    GLsizeiptr size, const GLvoid * data)
{
   _mesa_marshal_BufferSubData_merged(buffer, offset, size, data, true,
                                      true, "NamedBufferSubDataEXT");
}