src/mesa/main/shared.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file shared.c
  27  * Shared-context state
  28  */
  29
  30
  31
  32 #include "imports.h"
  33 #include "mtypes.h"
  34 #include "hash.h"
  35 #include "arrayobj.h"
  36 #include "bufferobj.h"
  37 #include "shared.h"
  38 #include "shader/program.h"
  39 #include "shader/shader_api.h"
  40 #include "dlist.h"
  41 #if FEATURE_ATI_fragment_shader
  42 #include "shader/atifragshader.h"
  43 #endif
  44 #if FEATURE_ARB_sync
  45 #include "syncobj.h"
  46 #endif
  47
  48 /**
  49  * Allocate and initialize a shared context state structure.
  50  * Initializes the display list, texture objects and vertex programs hash
  51  * tables, allocates the texture objects. If it runs out of memory, frees
  52  * everything already allocated before returning NULL.
  53  *
  54  * \return pointer to a gl_shared_state structure on success, or NULL on
  55  * failure.
  56  */
  57 struct gl_shared_state *
  58 _mesa_alloc_shared_state(GLcontext *ctx)
  59 {
  60    struct gl_shared_state *shared;
  61    GLuint i;
  62
  63    shared = CALLOC_STRUCT(gl_shared_state);
  64    if (!shared)
  65       return NULL;
  66
  67    _glthread_INIT_MUTEX(shared->Mutex);
  68
  69    shared->DisplayList = _mesa_NewHashTable();
  70    shared->TexObjects = _mesa_NewHashTable();
  71    shared->Programs = _mesa_NewHashTable();
  72
  73 #if FEATURE_ARB_vertex_program
  74    shared->DefaultVertexProgram = (struct gl_vertex_program *)
  75       ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
  76 #endif
  77
  78 #if FEATURE_ARB_fragment_program
  79    shared->DefaultFragmentProgram = (struct gl_fragment_program *)
  80       ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
  81 #endif
  82
  83 #if FEATURE_ATI_fragment_shader
  84    shared->ATIShaders = _mesa_NewHashTable();
  85    shared->DefaultFragmentShader = _mesa_new_ati_fragment_shader(ctx, 0);
  86 #endif
  87
  88 #if FEATURE_ARB_shader_objects
  89    shared->ShaderObjects = _mesa_NewHashTable();
  90 #endif
  91
  92 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
  93    shared->BufferObjects = _mesa_NewHashTable();
  94 #endif
  95
  96    /* Allocate the default buffer object */
  97    shared->NullBufferObj = ctx->Driver.NewBufferObject(ctx, 0, 0);
  98
  99    /* Create default texture objects */
 100    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
 101       /* NOTE: the order of these enums matches the TEXTURE_x_INDEX values */
 102       static const GLenum targets[NUM_TEXTURE_TARGETS] = {
 103          GL_TEXTURE_2D_ARRAY_EXT,
 104          GL_TEXTURE_1D_ARRAY_EXT,
 105          GL_TEXTURE_CUBE_MAP,
 106          GL_TEXTURE_3D,
 107          GL_TEXTURE_RECTANGLE_NV,
 108          GL_TEXTURE_2D,
 109          GL_TEXTURE_1D
 110       };
 111       shared->DefaultTex[i] = ctx->Driver.NewTextureObject(ctx, 0, targets[i]);
 112    }
 113
 114    /* sanity check */
 115    assert(shared->DefaultTex[TEXTURE_1D_INDEX]->RefCount == 1);
 116
 117    /* Mutex and timestamp for texobj state validation */
 118    _glthread_INIT_MUTEX(shared->TexMutex);
 119    shared->TextureStateStamp = 0;
 120
 121 #if FEATURE_EXT_framebuffer_object
 122    shared->FrameBuffers = _mesa_NewHashTable();
 123    shared->RenderBuffers = _mesa_NewHashTable();
 124 #endif
 125
 126 #if FEATURE_ARB_sync
 127    make_empty_list(& shared->SyncObjects);
 128 #endif
 129
 130    return shared;
 131 }
 132
 133
 134 /**
 135  * Callback for deleting a display list.  Called by _mesa_HashDeleteAll().
 136  */
 137 static void
 138 delete_displaylist_cb(GLuint id, void *data, void *userData)
 139 {
 140    struct gl_display_list *list = (struct gl_display_list *) data;
 141    GLcontext *ctx = (GLcontext *) userData;
 142    _mesa_delete_list(ctx, list);
 143 }
 144
 145
 146 /**
 147  * Callback for deleting a texture object.  Called by _mesa_HashDeleteAll().
 148  */
 149 static void
 150 delete_texture_cb(GLuint id, void *data, void *userData)
 151 {
 152    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 153    GLcontext *ctx = (GLcontext *) userData;
 154    ctx->Driver.DeleteTexture(ctx, texObj);
 155 }
 156
 157
 158 /**
 159  * Callback for deleting a program object.  Called by _mesa_HashDeleteAll().
 160  */
 161 static void
 162 delete_program_cb(GLuint id, void *data, void *userData)
 163 {
 164    struct gl_program *prog = (struct gl_program *) data;
 165    GLcontext *ctx = (GLcontext *) userData;
 166    if(prog != &_mesa_DummyProgram) {
 167       ASSERT(prog->RefCount == 1); /* should only be referenced by hash table */
 168       prog->RefCount = 0;  /* now going away */
 169       ctx->Driver.DeleteProgram(ctx, prog);
 170    }
 171 }
 172
 173
 174 #if FEATURE_ATI_fragment_shader
 175 /**
 176  * Callback for deleting an ATI fragment shader object.
 177  * Called by _mesa_HashDeleteAll().
 178  */
 179 static void
 180 delete_fragshader_cb(GLuint id, void *data, void *userData)
 181 {
 182    struct ati_fragment_shader *shader = (struct ati_fragment_shader *) data;
 183    GLcontext *ctx = (GLcontext *) userData;
 184    _mesa_delete_ati_fragment_shader(ctx, shader);
 185 }
 186 #endif
 187
 188
 189 /**
 190  * Callback for deleting a buffer object.  Called by _mesa_HashDeleteAll().
 191  */
 192 static void
 193 delete_bufferobj_cb(GLuint id, void *data, void *userData)
 194 {
 195    struct gl_buffer_object *bufObj = (struct gl_buffer_object *) data;
 196    GLcontext *ctx = (GLcontext *) userData;
 197    if (_mesa_bufferobj_mapped(bufObj)) {
 198       ctx->Driver.UnmapBuffer(ctx, 0, bufObj);
 199       bufObj->Pointer = NULL;
 200    }
 201    _mesa_reference_buffer_object(ctx, &bufObj, NULL);
 202 }
 203
 204
 205 /**
 206  * Callback for freeing shader program data. Call it before delete_shader_cb
 207  * to avoid memory access error.
 208  */
 209 static void
 210 free_shader_program_data_cb(GLuint id, void *data, void *userData)
 211 {
 212    GLcontext *ctx = (GLcontext *) userData;
 213    struct gl_shader_program *shProg = (struct gl_shader_program *) data;
 214
 215    if (shProg->Type == GL_SHADER_PROGRAM_MESA) {
 216        _mesa_free_shader_program_data(ctx, shProg);
 217    }
 218 }
 219
 220
 221 /**
 222  * Callback for deleting shader and shader programs objects.
 223  * Called by _mesa_HashDeleteAll().
 224  */
 225 static void
 226 delete_shader_cb(GLuint id, void *data, void *userData)
 227 {
 228    GLcontext *ctx = (GLcontext *) userData;
 229    struct gl_shader *sh = (struct gl_shader *) data;
 230    if (sh->Type == GL_FRAGMENT_SHADER || sh->Type == GL_VERTEX_SHADER) {
 231       _mesa_free_shader(ctx, sh);
 232    }
 233    else {
 234       struct gl_shader_program *shProg = (struct gl_shader_program *) data;
 235       ASSERT(shProg->Type == GL_SHADER_PROGRAM_MESA);
 236       _mesa_free_shader_program(ctx, shProg);
 237    }
 238 }
 239
 240
 241 /**
 242  * Callback for deleting a framebuffer object.  Called by _mesa_HashDeleteAll()
 243  */
 244 static void
 245 delete_framebuffer_cb(GLuint id, void *data, void *userData)
 246 {
 247    struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
 248    /* The fact that the framebuffer is in the hashtable means its refcount
 249     * is one, but we're removing from the hashtable now.  So clear refcount.
 250     */
 251    /*assert(fb->RefCount == 1);*/
 252    fb->RefCount = 0;
 253
 254    /* NOTE: Delete should always be defined but there are two reports
 255     * of it being NULL (bugs 13507, 14293).  Work-around for now.
 256     */
 257    if (fb->Delete)
 258       fb->Delete(fb);
 259 }
 260
 261
 262 /**
 263  * Callback for deleting a renderbuffer object. Called by _mesa_HashDeleteAll()
 264  */
 265 static void
 266 delete_renderbuffer_cb(GLuint id, void *data, void *userData)
 267 {
 268    struct gl_renderbuffer *rb = (struct gl_renderbuffer *) data;
 269    rb->RefCount = 0;  /* see comment for FBOs above */
 270    if (rb->Delete)
 271       rb->Delete(rb);
 272 }
 273
 274
 275 /**
 276  * Deallocate a shared state object and all children structures.
 277  *
 278  * \param ctx GL context.
 279  * \param shared shared state pointer.
 280  *
 281  * Frees the display lists, the texture objects (calling the driver texture
 282  * deletion callback to free its private data) and the vertex programs, as well
 283  * as their hash tables.
 284  *
 285  * \sa alloc_shared_state().
 286  */
 287 static void
 288 free_shared_state(GLcontext *ctx, struct gl_shared_state *shared)
 289 {
 290    GLuint i;
 291
 292    /*
 293     * Free display lists
 294     */
 295    _mesa_HashDeleteAll(shared->DisplayList, delete_displaylist_cb, ctx);
 296    _mesa_DeleteHashTable(shared->DisplayList);
 297
 298 #if FEATURE_ARB_shader_objects
 299    _mesa_HashWalk(shared->ShaderObjects, free_shader_program_data_cb, ctx);
 300    _mesa_HashDeleteAll(shared->ShaderObjects, delete_shader_cb, ctx);
 301    _mesa_DeleteHashTable(shared->ShaderObjects);
 302 #endif
 303
 304    _mesa_HashDeleteAll(shared->Programs, delete_program_cb, ctx);
 305    _mesa_DeleteHashTable(shared->Programs);
 306
 307 #if FEATURE_ARB_vertex_program
 308    _mesa_reference_vertprog(ctx, &shared->DefaultVertexProgram, NULL);
 309 #endif
 310
 311 #if FEATURE_ARB_fragment_program
 312    _mesa_reference_fragprog(ctx, &shared->DefaultFragmentProgram, NULL);
 313 #endif
 314
 315 #if FEATURE_ATI_fragment_shader
 316    _mesa_HashDeleteAll(shared->ATIShaders, delete_fragshader_cb, ctx);
 317    _mesa_DeleteHashTable(shared->ATIShaders);
 318    _mesa_delete_ati_fragment_shader(ctx, shared->DefaultFragmentShader);
 319 #endif
 320
 321 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
 322    _mesa_HashDeleteAll(shared->BufferObjects, delete_bufferobj_cb, ctx);
 323    _mesa_DeleteHashTable(shared->BufferObjects);
 324 #endif
 325
 326 #if FEATURE_EXT_framebuffer_object
 327    _mesa_HashDeleteAll(shared->FrameBuffers, delete_framebuffer_cb, ctx);
 328    _mesa_DeleteHashTable(shared->FrameBuffers);
 329    _mesa_HashDeleteAll(shared->RenderBuffers, delete_renderbuffer_cb, ctx);
 330    _mesa_DeleteHashTable(shared->RenderBuffers);
 331 #endif
 332
 333 #if FEATURE_ARB_vertex_buffer_object
 334    _mesa_reference_buffer_object(ctx, &shared->NullBufferObj, NULL);
 335 #endif
 336
 337 #if FEATURE_ARB_sync
 338    {
 339       struct simple_node *node;
 340       struct simple_node *temp;
 341
 342       foreach_s(node, temp, & shared->SyncObjects) {
 343          _mesa_unref_sync_object(ctx, (struct gl_sync_object *) node);
 344       }
 345    }
 346 #endif
 347
 348    /*
 349     * Free texture objects (after FBOs since some textures might have
 350     * been bound to FBOs).
 351     */
 352    ASSERT(ctx->Driver.DeleteTexture);
 353    /* the default textures */
 354    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
 355       ctx->Driver.DeleteTexture(ctx, shared->DefaultTex[i]);
 356    }
 357
 358    /* all other textures */
 359    _mesa_HashDeleteAll(shared->TexObjects, delete_texture_cb, ctx);
 360    _mesa_DeleteHashTable(shared->TexObjects);
 361
 362    _glthread_DESTROY_MUTEX(shared->Mutex);
 363    _glthread_DESTROY_MUTEX(shared->TexMutex);
 364
 365    free(shared);
 366 }
 367
 368
 369 /**
 370  * Decrement shared state object reference count and potentially free it
 371  * and all children structures.
 372  *
 373  * \param ctx GL context.
 374  * \param shared shared state pointer.
 375  *
 376  * \sa free_shared_state().
 377  */
 378 void
 379 _mesa_release_shared_state(GLcontext *ctx, struct gl_shared_state *shared)
 380 {
 381    GLint RefCount;
 382
 383    _glthread_LOCK_MUTEX(shared->Mutex);
 384    RefCount = --shared->RefCount;
 385    _glthread_UNLOCK_MUTEX(shared->Mutex);
 386
 387    assert(RefCount >= 0);
 388
 389    if (RefCount == 0) {
 390       /* free shared state */
 391       free_shared_state( ctx, shared );
 392    }
 393 }