reactos/dll/opengl/mesa/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 #include "imports.h"
  31 #include "mfeatures.h"
  32 #include "mtypes.h"
  33 #include "hash.h"
  34 #include "bufferobj.h"
  35 #include "shared.h"
  36 #include "program/program.h"
  37 #include "dlist.h"
  38 #include "shaderobj.h"
  39
  40
  41 /**
  42  * Allocate and initialize a shared context state structure.
  43  * Initializes the display list, texture objects and vertex programs hash
  44  * tables, allocates the texture objects. If it runs out of memory, frees
  45  * everything already allocated before returning NULL.
  46  *
  47  * \return pointer to a gl_shared_state structure on success, or NULL on
  48  * failure.
  49  */
  50 struct gl_shared_state *
  51 _mesa_alloc_shared_state(struct gl_context *ctx)
  52 {
  53    struct gl_shared_state *shared;
  54    GLuint i;
  55
  56    shared = CALLOC_STRUCT(gl_shared_state);
  57    if (!shared)
  58       return NULL;
  59
  60    _glthread_INIT_MUTEX(shared->Mutex);
  61
  62    shared->DisplayList = _mesa_NewHashTable();
  63    shared->TexObjects = _mesa_NewHashTable();
  64    shared->Programs = _mesa_NewHashTable();
  65
  66 #if FEATURE_ARB_vertex_program
  67    shared->DefaultVertexProgram = (struct gl_vertex_program *)
  68       ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
  69 #endif
  70
  71 #if FEATURE_ARB_fragment_program
  72    shared->DefaultFragmentProgram = (struct gl_fragment_program *)
  73       ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
  74 #endif
  75
  76 #if FEATURE_ARB_shader_objects
  77    shared->ShaderObjects = _mesa_NewHashTable();
  78 #endif
  79
  80    shared->BufferObjects = _mesa_NewHashTable();
  81
  82    /* Allocate the default buffer object */
  83    shared->NullBufferObj = ctx->Driver.NewBufferObject(ctx, 0, 0);
  84
  85    /* Create default texture objects */
  86    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
  87       /* NOTE: the order of these enums matches the TEXTURE_x_INDEX values */
  88       static const GLenum targets[NUM_TEXTURE_TARGETS] = {
  89          GL_TEXTURE_BUFFER,
  90          GL_TEXTURE_2D_ARRAY_EXT,
  91          GL_TEXTURE_1D_ARRAY_EXT,
  92          GL_TEXTURE_EXTERNAL_OES,
  93          GL_TEXTURE_CUBE_MAP,
  94          GL_TEXTURE_3D,
  95          GL_TEXTURE_RECTANGLE_NV,
  96          GL_TEXTURE_2D,
  97          GL_TEXTURE_1D
  98       };
  99       STATIC_ASSERT(Elements(targets) == NUM_TEXTURE_TARGETS);
 100       shared->DefaultTex[i] = ctx->Driver.NewTextureObject(ctx, 0, targets[i]);
 101    }
 102
 103    /* sanity check */
 104    assert(shared->DefaultTex[TEXTURE_1D_INDEX]->RefCount == 1);
 105
 106    /* Mutex and timestamp for texobj state validation */
 107    _glthread_INIT_MUTEX(shared->TexMutex);
 108    shared->TextureStateStamp = 0;
 109
 110 #if FEATURE_EXT_framebuffer_object
 111    shared->FrameBuffers = _mesa_NewHashTable();
 112    shared->RenderBuffers = _mesa_NewHashTable();
 113 #endif
 114
 115    return shared;
 116 }
 117
 118
 119 /**
 120  * Callback for deleting a display list.  Called by _mesa_HashDeleteAll().
 121  */
 122 static void
 123 delete_displaylist_cb(GLuint id, void *data, void *userData)
 124 {
 125    struct gl_display_list *list = (struct gl_display_list *) data;
 126    struct gl_context *ctx = (struct gl_context *) userData;
 127    _mesa_delete_list(ctx, list);
 128 }
 129
 130
 131 /**
 132  * Callback for deleting a texture object.  Called by _mesa_HashDeleteAll().
 133  */
 134 static void
 135 delete_texture_cb(GLuint id, void *data, void *userData)
 136 {
 137    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 138    struct gl_context *ctx = (struct gl_context *) userData;
 139    ctx->Driver.DeleteTexture(ctx, texObj);
 140 }
 141
 142
 143 /**
 144  * Callback for deleting a program object.  Called by _mesa_HashDeleteAll().
 145  */
 146 static void
 147 delete_program_cb(GLuint id, void *data, void *userData)
 148 {
 149    struct gl_program *prog = (struct gl_program *) data;
 150    struct gl_context *ctx = (struct gl_context *) userData;
 151    if(prog != &_mesa_DummyProgram) {
 152       ASSERT(prog->RefCount == 1); /* should only be referenced by hash table */
 153       prog->RefCount = 0;  /* now going away */
 154       ctx->Driver.DeleteProgram(ctx, prog);
 155    }
 156 }
 157
 158
 159 /**
 160  * Callback for deleting a buffer object.  Called by _mesa_HashDeleteAll().
 161  */
 162 static void
 163 delete_bufferobj_cb(GLuint id, void *data, void *userData)
 164 {
 165    struct gl_buffer_object *bufObj = (struct gl_buffer_object *) data;
 166    struct gl_context *ctx = (struct gl_context *) userData;
 167    if (_mesa_bufferobj_mapped(bufObj)) {
 168       ctx->Driver.UnmapBuffer(ctx, bufObj);
 169       bufObj->Pointer = NULL;
 170    }
 171    _mesa_reference_buffer_object(ctx, &bufObj, NULL);
 172 }
 173
 174
 175 /**
 176  * Callback for freeing shader program data. Call it before delete_shader_cb
 177  * to avoid memory access error.
 178  */
 179 static void
 180 free_shader_program_data_cb(GLuint id, void *data, void *userData)
 181 {
 182    struct gl_context *ctx = (struct gl_context *) userData;
 183    struct gl_shader_program *shProg = (struct gl_shader_program *) data;
 184
 185    if (shProg->Type == GL_SHADER_PROGRAM_MESA) {
 186        _mesa_free_shader_program_data(ctx, shProg);
 187    }
 188 }
 189
 190
 191 /**
 192  * Callback for deleting shader and shader programs objects.
 193  * Called by _mesa_HashDeleteAll().
 194  */
 195 static void
 196 delete_shader_cb(GLuint id, void *data, void *userData)
 197 {
 198    struct gl_context *ctx = (struct gl_context *) userData;
 199    struct gl_shader *sh = (struct gl_shader *) data;
 200    if (sh->Type == GL_FRAGMENT_SHADER || sh->Type == GL_VERTEX_SHADER) {
 201       ctx->Driver.DeleteShader(ctx, sh);
 202    }
 203    else {
 204       struct gl_shader_program *shProg = (struct gl_shader_program *) data;
 205       ASSERT(shProg->Type == GL_SHADER_PROGRAM_MESA);
 206       ctx->Driver.DeleteShaderProgram(ctx, shProg);
 207    }
 208 }
 209
 210
 211 /**
 212  * Callback for deleting a framebuffer object.  Called by _mesa_HashDeleteAll()
 213  */
 214 static void
 215 delete_framebuffer_cb(GLuint id, void *data, void *userData)
 216 {
 217    struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
 218    /* The fact that the framebuffer is in the hashtable means its refcount
 219     * is one, but we're removing from the hashtable now.  So clear refcount.
 220     */
 221    /*assert(fb->RefCount == 1);*/
 222    fb->RefCount = 0;
 223
 224    /* NOTE: Delete should always be defined but there are two reports
 225     * of it being NULL (bugs 13507, 14293).  Work-around for now.
 226     */
 227    if (fb->Delete)
 228       fb->Delete(fb);
 229 }
 230
 231
 232 /**
 233  * Callback for deleting a renderbuffer object. Called by _mesa_HashDeleteAll()
 234  */
 235 static void
 236 delete_renderbuffer_cb(GLuint id, void *data, void *userData)
 237 {
 238    struct gl_renderbuffer *rb = (struct gl_renderbuffer *) data;
 239    rb->RefCount = 0;  /* see comment for FBOs above */
 240    if (rb->Delete)
 241       rb->Delete(rb);
 242 }
 243
 244
 245 /**
 246  * Deallocate a shared state object and all children structures.
 247  *
 248  * \param ctx GL context.
 249  * \param shared shared state pointer.
 250  *
 251  * Frees the display lists, the texture objects (calling the driver texture
 252  * deletion callback to free its private data) and the vertex programs, as well
 253  * as their hash tables.
 254  *
 255  * \sa alloc_shared_state().
 256  */
 257 static void
 258 free_shared_state(struct gl_context *ctx, struct gl_shared_state *shared)
 259 {
 260    GLuint i;
 261
 262    /* Free the dummy/fallback texture object */
 263    if (shared->FallbackTex)
 264       ctx->Driver.DeleteTexture(ctx, shared->FallbackTex);
 265
 266    /*
 267     * Free display lists
 268     */
 269    _mesa_HashDeleteAll(shared->DisplayList, delete_displaylist_cb, ctx);
 270    _mesa_DeleteHashTable(shared->DisplayList);
 271
 272 #if FEATURE_ARB_shader_objects
 273    _mesa_HashWalk(shared->ShaderObjects, free_shader_program_data_cb, ctx);
 274    _mesa_HashDeleteAll(shared->ShaderObjects, delete_shader_cb, ctx);
 275    _mesa_DeleteHashTable(shared->ShaderObjects);
 276 #endif
 277
 278    _mesa_HashDeleteAll(shared->Programs, delete_program_cb, ctx);
 279    _mesa_DeleteHashTable(shared->Programs);
 280
 281 #if FEATURE_ARB_vertex_program
 282    _mesa_reference_vertprog(ctx, &shared->DefaultVertexProgram, NULL);
 283 #endif
 284
 285 #if FEATURE_ARB_fragment_program
 286    _mesa_reference_fragprog(ctx, &shared->DefaultFragmentProgram, NULL);
 287 #endif
 288
 289    _mesa_HashDeleteAll(shared->BufferObjects, delete_bufferobj_cb, ctx);
 290    _mesa_DeleteHashTable(shared->BufferObjects);
 291
 292 #if FEATURE_EXT_framebuffer_object
 293    _mesa_HashDeleteAll(shared->FrameBuffers, delete_framebuffer_cb, ctx);
 294    _mesa_DeleteHashTable(shared->FrameBuffers);
 295    _mesa_HashDeleteAll(shared->RenderBuffers, delete_renderbuffer_cb, ctx);
 296    _mesa_DeleteHashTable(shared->RenderBuffers);
 297 #endif
 298
 299    _mesa_reference_buffer_object(ctx, &shared->NullBufferObj, NULL);
 300
 301    /*
 302     * Free texture objects (after FBOs since some textures might have
 303     * been bound to FBOs).
 304     */
 305    ASSERT(ctx->Driver.DeleteTexture);
 306    /* the default textures */
 307    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
 308       ctx->Driver.DeleteTexture(ctx, shared->DefaultTex[i]);
 309    }
 310
 311    /* all other textures */
 312    _mesa_HashDeleteAll(shared->TexObjects, delete_texture_cb, ctx);
 313    _mesa_DeleteHashTable(shared->TexObjects);
 314
 315    _glthread_DESTROY_MUTEX(shared->Mutex);
 316    _glthread_DESTROY_MUTEX(shared->TexMutex);
 317
 318    free(shared);
 319 }
 320
 321
 322 /**
 323  * gl_shared_state objects are ref counted.
 324  * If ptr's refcount goes to zero, free the shared state.
 325  */
 326 void
 327 _mesa_reference_shared_state(struct gl_context *ctx,
 328                              struct gl_shared_state **ptr,
 329                              struct gl_shared_state *state)
 330 {
 331    if (*ptr == state)
 332       return;
 333
 334    if (*ptr) {
 335       /* unref old state */
 336       struct gl_shared_state *old = *ptr;
 337       GLboolean delete;
 338
 339       _glthread_LOCK_MUTEX(old->Mutex);
 340       assert(old->RefCount >= 1);
 341       old->RefCount--;
 342       delete = (old->RefCount == 0);
 343       _glthread_UNLOCK_MUTEX(old->Mutex);
 344
 345       if (delete) {
 346          free_shared_state(ctx, old);
 347       }
 348
 349       *ptr = NULL;
 350    }
 351
 352    if (state) {
 353       /* reference new state */
 354       _glthread_LOCK_MUTEX(state->Mutex);
 355       state->RefCount++;
 356       *ptr = state;
 357       _glthread_UNLOCK_MUTEX(state->Mutex);
 358    }
 359 }