/**
* Determine if ID is the name of a buffer object.
*
* \param id ID of the potential buffer object.
* \return \c GL_TRUE if \c id is the name of a buffer object,
* \c GL_FALSE otherwise.
*/
GLboolean GLAPIENTRY
_mesa_IsBufferARB(GLuint id)
{
struct gl_buffer_object *bufObj;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
bufObj = _mesa_lookup_bufferobj(ctx, id);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
return bufObj ? GL_TRUE : GL_FALSE;
}
/**
* Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
* \return current context status
*/
GLenum GLAPIENTRY
_mesa_GetGraphicsResetStatusARB( void )
{
GET_CURRENT_CONTEXT(ctx);
GLenum status = GL_NO_ERROR;
/* The ARB_robustness specification says:
*
* "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
* then the implementation will never deliver notification of reset
* events, and GetGraphicsResetStatusARB will always return NO_ERROR."
*/
if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx,
"glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
"because reset notifictation was not requested at context "
"creation.\n");
return GL_NO_ERROR;
}
if (ctx->Driver.GetGraphicsResetStatus) {
/* Query the reset status of this context from the driver core.
*/
status = ctx->Driver.GetGraphicsResetStatus(ctx);
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
/* If this context has not been affected by a GPU reset, check to see if
* some other context in the share group has been affected by a reset.
* If another context saw a reset but this context did not, assume that
* this context was not guilty.
*/
if (status != GL_NO_ERROR) {
ctx->Shared->ShareGroupReset = true;
} else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
status = GL_INNOCENT_CONTEXT_RESET_ARB;
}
ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
_mesa_debug(ctx,
"glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
"because the driver doesn't track reset status.\n");
return status;
}
void
_mesa_unref_sync_object(GLcontext *ctx, struct gl_sync_object *syncObj)
{
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
syncObj->RefCount--;
if (syncObj->RefCount == 0) {
remove_from_list(& syncObj->link);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
ctx->Driver.DeleteSyncObject(ctx, syncObj);
} else {
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
}
/**
* Get the key of the "first" entry in the hash table.
* This is used in the course of deleting all display lists when
* a context is destroyed.
* \param table - the hash table
* \return key for the "first" entry in the hash table.
*/
GLuint _mesa_HashFirstEntry(struct _mesa_HashTable *table)
{
GLuint pos;
assert(table);
_glthread_LOCK_MUTEX(table->Mutex);
for (pos=0; pos < TABLE_SIZE; pos++) {
if (table->Table[pos]) {
_glthread_UNLOCK_MUTEX(table->Mutex);
return table->Table[pos]->Key;
}
}
_glthread_UNLOCK_MUTEX(table->Mutex);
return 0;
}
static void
finish_or_flush( GLcontext *ctx )
{
#ifdef XFree86Server
/* NOT_NEEDED */
#else
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
if (xmesa) {
_glthread_LOCK_MUTEX(_xmesa_lock);
XSync( xmesa->display, False );
_glthread_UNLOCK_MUTEX(_xmesa_lock);
}
#endif
}
void
_mesa_exec_free(void *addr)
{
_glthread_LOCK_MUTEX(exec_mutex);
if (exec_heap) {
struct mem_block *block = mmFindBlock(exec_heap, (unsigned char *)addr - exec_mem);
if (block)
mmFreeMem(block);
}
_glthread_UNLOCK_MUTEX(exec_mutex);
}
/**
* Add the given texture object to the texture object pool.
*/
void
_mesa_save_texture_object( GLcontext *ctx, struct gl_texture_object *texObj )
{
/* insert into linked list */
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
texObj->Next = ctx->Shared->TexObjectList;
ctx->Shared->TexObjectList = texObj;
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
if (texObj->Name > 0) {
/* insert into hash table */
_mesa_HashInsert(ctx->Shared->TexObjects, texObj->Name, texObj);
}
}
/**
* Set *ptr to point to rb. If *ptr points to another renderbuffer,
* dereference that buffer first. The new renderbuffer's refcount will
* be incremented. The old renderbuffer's refcount will be decremented.
* This is normally only called from the _mesa_reference_renderbuffer() macro
* when there's a real pointer change.
*/
void
_mesa_reference_renderbuffer_(struct gl_renderbuffer **ptr,
struct gl_renderbuffer *rb)
{
if (*ptr) {
/* Unreference the old renderbuffer */
GLboolean deleteFlag = GL_FALSE;
struct gl_renderbuffer *oldRb = *ptr;
_glthread_LOCK_MUTEX(oldRb->Mutex);
ASSERT(oldRb->RefCount > 0);
oldRb->RefCount--;
/*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
deleteFlag = (oldRb->RefCount == 0);
_glthread_UNLOCK_MUTEX(oldRb->Mutex);
if (deleteFlag) {
GET_CURRENT_CONTEXT(ctx);
if (ctx)
oldRb->Delete(ctx, oldRb);
else
_mesa_problem(NULL, "Unable to delete renderbuffer, no context");
}
*ptr = NULL;
}
assert(!*ptr);
if (rb) {
/* reference new renderbuffer */
_glthread_LOCK_MUTEX(rb->Mutex);
rb->RefCount++;
/*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
_glthread_UNLOCK_MUTEX(rb->Mutex);
*ptr = rb;
}
}
/**
* Delete named textures.
*
* \param n number of textures to be deleted.
* \param textures array of texture IDs to be deleted.
*
* \sa glDeleteTextures().
*
* If we're about to delete a texture that's currently bound to any
* texture unit, unbind the texture first. Decrement the reference
* count on the texture object and delete it if it's zero.
* Recall that texture objects can be shared among several rendering
* contexts.
*/
void GLAPIENTRY
_mesa_DeleteTextures( GLsizei n, const GLuint *textures)
{
GET_CURRENT_CONTEXT(ctx);
GLint i;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
if (!textures)
return;
for (i = 0; i < n; i++) {
if (textures[i] > 0) {
struct gl_texture_object *delObj
= _mesa_lookup_texture(ctx, textures[i]);
if (delObj) {
_mesa_lock_texture(ctx, delObj);
/* Check if texture is bound to any framebuffer objects.
* If so, unbind.
* See section 4.4.2.3 of GL_EXT_framebuffer_object.
*/
unbind_texobj_from_fbo(ctx, delObj);
/* Check if this texture is currently bound to any texture units.
* If so, unbind it.
*/
unbind_texobj_from_texunits(ctx, delObj);
_mesa_unlock_texture(ctx, delObj);
ctx->NewState |= _NEW_TEXTURE;
/* The texture _name_ is now free for re-use.
* Remove it from the hash table now.
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
_mesa_HashRemove(ctx->Shared->TexObjects, delObj->Name);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
/* Unreference the texobj. If refcount hits zero, the texture
* will be deleted.
*/
_mesa_reference_texobj(&delObj, NULL);
}
}
}
}
/**
* Determine if ID is the name of an array object.
*
* \param id ID of the potential array object.
* \return \c GL_TRUE if \c id is the name of a array object,
* \c GL_FALSE otherwise.
*/
GLboolean GLAPIENTRY
_mesa_IsVertexArrayAPPLE( GLuint id )
{
struct gl_array_object * obj;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (id == 0)
return GL_FALSE;
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
obj = lookup_arrayobj(ctx, id);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
return (obj != NULL) ? GL_TRUE : GL_FALSE;
}
GLsync GLAPIENTRY
_mesa_FenceSync(GLenum condition, GLbitfield flags)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_sync_object *syncObj;
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
if (condition != GL_SYNC_GPU_COMMANDS_COMPLETE) {
_mesa_error(ctx, GL_INVALID_ENUM, "glFenceSync(condition=0x%x)",
condition);
return 0;
}
if (flags != 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glFenceSync(flags=0x%x)",
condition);
return 0;
}
syncObj = ctx->Driver.NewSyncObject(ctx, GL_SYNC_FENCE);
if (syncObj != NULL) {
syncObj->Type = GL_SYNC_FENCE;
/* The name is not currently used, and it is never visible to
* applications. If sync support is extended to provide support for
* NV_fence, this field will be used. We'll also need to add an object
* ID hashtable.
*/
syncObj->Name = 1;
syncObj->RefCount = 1;
syncObj->DeletePending = GL_FALSE;
syncObj->SyncCondition = condition;
syncObj->Flags = flags;
syncObj->StatusFlag = 0;
ctx->Driver.FenceSync(ctx, syncObj, condition, flags);
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
_mesa_set_add(ctx->Shared->SyncObjects,
_mesa_hash_pointer(syncObj),
syncObj);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
return (GLsync) syncObj;
}
return NULL;
}
/**
* Return the size of the window (or pixmap) that corresponds to the
* given XMesaBuffer.
* \param width returns width in pixels
* \param height returns height in pixels
*/
void
xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
GLuint *width, GLuint *height)
{
Status stat;
_glthread_LOCK_MUTEX(_xmesa_lock);
XSync(b->xm_visual->display, 0); /* added for Chromium */
stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
_glthread_UNLOCK_MUTEX(_xmesa_lock);
if (!stat) {
/* probably querying a window that's recently been destroyed */
_mesa_warning(NULL, "XGetGeometry failed!\n");
*width = *height = 1;
}
}
/**
* Calls all the various one-time-init functions in Mesa.
*
* While holding a global mutex lock, calls several initialization functions,
* and sets the glapi callbacks if the \c MESA_DEBUG environment variable is
* defined.
*
* \sa _math_init().
*/
static void
one_time_init( GLcontext *ctx )
{
static GLboolean alreadyCalled = GL_FALSE;
(void) ctx;
_glthread_LOCK_MUTEX(OneTimeLock);
if (!alreadyCalled) {
GLuint i;
/* do some implementation tests */
assert( sizeof(GLbyte) == 1 );
assert( sizeof(GLubyte) == 1 );
assert( sizeof(GLshort) == 2 );
assert( sizeof(GLushort) == 2 );
assert( sizeof(GLint) == 4 );
assert( sizeof(GLuint) == 4 );
_mesa_get_cpu_features();
_mesa_init_remap_table();
_mesa_init_sqrt_table();
for (i = 0; i < 256; i++) {
_mesa_ubyte_to_float_color_tab[i] = (float) i / 255.0F;
}
if (_mesa_getenv("MESA_DEBUG")) {
_glapi_noop_enable_warnings(GL_TRUE);
_glapi_set_warning_func( (_glapi_warning_func) _mesa_warning );
}
else {
_glapi_noop_enable_warnings(GL_FALSE);
}
#if defined(DEBUG) && defined(__DATE__) && defined(__TIME__)
_mesa_debug(ctx, "Mesa %s DEBUG build %s %s\n",
MESA_VERSION_STRING, __DATE__, __TIME__);
#endif
alreadyCalled = GL_TRUE;
}
_glthread_UNLOCK_MUTEX(OneTimeLock);
dummy_enum_func();
}
/**
* Generate texture names.
*
* \param n number of texture names to be generated.
* \param textures an array in which will hold the generated texture names.
*
* \sa glGenTextures().
*
* Calls _mesa_HashFindFreeKeyBlock() to find a block of free texture
* IDs which are stored in \p textures. Corresponding empty texture
* objects are also generated.
*/
void GLAPIENTRY
_mesa_GenTextures( GLsizei n, GLuint *textures )
{
GET_CURRENT_CONTEXT(ctx);
GLuint first;
GLint i;
if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
_mesa_debug(ctx, "glGenTextures %d\n", n);
if (n < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glGenTextures" );
return;
}
if (!textures)
return;
/*
* This must be atomic (generation and allocation of texture IDs)
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
first = _mesa_HashFindFreeKeyBlock(ctx->Shared->TexObjects, n);
/* Allocate new, empty texture objects */
for (i = 0; i < n; i++) {
struct gl_texture_object *texObj;
GLuint name = first + i;
GLenum target = 0;
texObj = ctx->Driver.NewTextureObject(ctx, name, target);
if (!texObj) {
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTextures");
return;
}
/* insert into hash table */
_mesa_HashInsert(ctx->Shared->TexObjects, texObj->Name, texObj);
textures[i] = name;
}
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
/**
* Set *ptr to point to fb, with refcounting and locking.
*/
void
_mesa_reference_framebuffer(struct gl_framebuffer **ptr,
struct gl_framebuffer *fb)
{
assert(ptr);
if (*ptr == fb) {
/* no change */
return;
}
if (*ptr) {
_mesa_unreference_framebuffer(ptr);
}
assert(!*ptr);
assert(fb);
_glthread_LOCK_MUTEX(fb->Mutex);
fb->RefCount++;
_glthread_UNLOCK_MUTEX(fb->Mutex);
*ptr = fb;
}
/**
* Fallback for ctx->Driver.FramebufferRenderbuffer()
* Attach a renderbuffer object to a framebuffer object.
*/
void
_mesa_framebuffer_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
GLenum attachment, struct gl_renderbuffer *rb)
{
struct gl_renderbuffer_attachment *att;
_glthread_LOCK_MUTEX(fb->Mutex);
att = _mesa_get_attachment(ctx, fb, attachment);
ASSERT(att);
if (rb) {
_mesa_set_renderbuffer_attachment(ctx, att, rb);
}
else {
_mesa_remove_attachment(ctx, att);
}
_glthread_UNLOCK_MUTEX(fb->Mutex);
}
/**
* Insert a key/pointer pair into the hash table.
* If an entry with this key already exists we'll replace the existing entry.
*
* \param table the hash table.
* \param key the key (not zero).
* \param data pointer to user data.
*/
void
_mesa_HashInsert(struct _mesa_HashTable *table, GLuint key, void *data)
{
/* search for existing entry with this key */
GLuint pos;
struct HashEntry *entry;
assert(table);
assert(key);
_glthread_LOCK_MUTEX(table->Mutex);
if (key > table->MaxKey)
table->MaxKey = key;
pos = HASH_FUNC(key);
/* check if replacing an existing entry with same key */
for (entry = table->Table[pos]; entry; entry = entry->Next) {
if (entry->Key == key) {
/* replace entry's data */
#if 0 /* not sure this check is always valid */
if (entry->Data) {
_mesa_problem(NULL, "Memory leak detected in _mesa_HashInsert");
}
#endif
entry->Data = data;
_glthread_UNLOCK_MUTEX(table->Mutex);
return;
}
}
/* alloc and insert new table entry */
entry = MALLOC_STRUCT(HashEntry);
if (entry) {
entry->Key = key;
entry->Data = data;
entry->Next = table->Table[pos];
table->Table[pos] = entry;
}
_glthread_UNLOCK_MUTEX(table->Mutex);
}
/**
* Undo/remove a reference to a framebuffer object.
* Decrement the framebuffer object's reference count and delete it when
* the refcount hits zero.
* Note: we pass the address of a pointer and set it to NULL.
*/
void
_mesa_unreference_framebuffer(struct gl_framebuffer **fb)
{
assert(fb);
if (*fb) {
GLboolean deleteFlag = GL_FALSE;
_glthread_LOCK_MUTEX((*fb)->Mutex);
ASSERT((*fb)->RefCount > 0);
(*fb)->RefCount--;
deleteFlag = ((*fb)->RefCount == 0);
_glthread_UNLOCK_MUTEX((*fb)->Mutex);
if (deleteFlag)
(*fb)->Delete(*fb);
*fb = NULL;
}
}
void
_mesa_unref_sync_object(struct gl_context *ctx, struct gl_sync_object *syncObj)
{
struct set_entry *entry;
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
syncObj->RefCount--;
if (syncObj->RefCount == 0) {
entry = _mesa_set_search(ctx->Shared->SyncObjects,
_mesa_hash_pointer(syncObj),
syncObj);
assert (entry != NULL);
_mesa_set_remove(ctx->Shared->SyncObjects, entry);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
ctx->Driver.DeleteSyncObject(ctx, syncObj);
} else {
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
}
/**
* Generate a set of unique buffer object IDs and store them in \c buffer.
*
* \param n Number of IDs to generate.
* \param buffer Array of \c n locations to store the IDs.
*/
void GLAPIENTRY
_mesa_GenBuffersARB(GLsizei n, GLuint *buffer)
{
GET_CURRENT_CONTEXT(ctx);
GLuint first;
GLint i;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (n < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glGenBuffersARB");
return;
}
if (!buffer) {
return;
}
/*
* This must be atomic (generation and allocation of buffer object IDs)
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n);
/* Allocate new, empty buffer objects and return identifiers */
for (i = 0; i < n; i++) {
struct gl_buffer_object *bufObj;
GLuint name = first + i;
GLenum target = 0;
bufObj = ctx->Driver.NewBufferObject( ctx, name, target );
if (!bufObj) {
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenBuffersARB");
return;
}
_mesa_HashInsert(ctx->Shared->BufferObjects, first + i, bufObj);
buffer[i] = first + i;
}
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
/**
* Generate a set of unique array object IDs and store them in \c arrays.
*
* \param n Number of IDs to generate.
* \param arrays Array of \c n locations to store the IDs.
*/
void GLAPIENTRY
_mesa_GenVertexArraysAPPLE(GLsizei n, GLuint *arrays)
{
GET_CURRENT_CONTEXT(ctx);
GLuint first;
GLint i;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (n < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glGenVertexArraysAPPLE");
return;
}
if (!arrays) {
return;
}
/*
* This must be atomic (generation and allocation of array object IDs)
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
first = _mesa_HashFindFreeKeyBlock(ctx->Shared->ArrayObjects, n);
/* Allocate new, empty array objects and return identifiers */
for (i = 0; i < n; i++) {
struct gl_array_object *obj;
GLuint name = first + i;
obj = (*ctx->Driver.NewArrayObject)( ctx, name );
if (!obj) {
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenVertexArraysAPPLE");
return;
}
_mesa_save_array_object(ctx, obj);
arrays[i] = first + i;
}
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
/**
* Walk over all entries in a hash table, calling callback function for each.
* Note: we use a separate mutex in this function to avoid a recursive
* locking deadlock (in case the callback calls _mesa_HashRemove()) and to
* prevent multiple threads/contexts from getting tangled up.
* A lock-less version of this function could be used when the table will
* not be modified.
* \param table the hash table to walk
* \param callback the callback function
* \param userData arbitrary pointer to pass along to the callback
* (this is typically a struct gl_context pointer)
*/
void
_mesa_HashWalk(const struct _mesa_HashTable *table,
void (*callback)(GLuint key, void *data, void *userData),
void *userData)
{
/* cast-away const */
struct _mesa_HashTable *table2 = (struct _mesa_HashTable *) table;
GLuint pos;
ASSERT(table);
ASSERT(callback);
_glthread_LOCK_MUTEX(table2->WalkMutex);
for (pos = 0; pos < TABLE_SIZE; pos++) {
struct HashEntry *entry, *next;
for (entry = table->Table[pos]; entry; entry = next) {
/* save 'next' pointer now in case the callback deletes the entry */
next = entry->Next;
callback(entry->Key, entry->Data, userData);
}
}
_glthread_UNLOCK_MUTEX(table2->WalkMutex);
}
/**
* Remove an entry from the hash table.
*
* \param table the hash table.
* \param key key of entry to remove.
*
* While holding the hash table's lock, searches the entry with the matching
* key and unlinks it.
*/
void
_mesa_HashRemove(struct _mesa_HashTable *table, GLuint key)
{
GLuint pos;
struct HashEntry *entry, *prev;
assert(table);
assert(key);
/* have to check this outside of mutex lock */
if (table->InDeleteAll) {
_mesa_problem(NULL, "_mesa_HashRemove illegally called from "
"_mesa_HashDeleteAll callback function");
return;
}
_glthread_LOCK_MUTEX(table->Mutex);
pos = HASH_FUNC(key);
prev = NULL;
entry = table->Table[pos];
while (entry) {
if (entry->Key == key) {
/* found it! */
if (prev) {
prev->Next = entry->Next;
}
else {
table->Table[pos] = entry->Next;
}
free(entry);
_glthread_UNLOCK_MUTEX(table->Mutex);
return;
}
prev = entry;
entry = entry->Next;
}
_glthread_UNLOCK_MUTEX(table->Mutex);
}
/**
* Delete all entries in a hash table, but don't delete the table itself.
* Invoke the given callback function for each table entry.
*
* \param table the hash table to delete
* \param callback the callback function
* \param userData arbitrary pointer to pass along to the callback
* (this is typically a struct gl_context pointer)
*/
void
_mesa_HashDeleteAll(struct _mesa_HashTable *table,
void (*callback)(GLuint key, void *data, void *userData),
void *userData)
{
GLuint pos;
ASSERT(table);
ASSERT(callback);
_glthread_LOCK_MUTEX(table->Mutex);
table->InDeleteAll = GL_TRUE;
for (pos = 0; pos < TABLE_SIZE; pos++) {
struct HashEntry *entry, *next;
for (entry = table->Table[pos]; entry; entry = next) {
callback(entry->Key, entry->Data, userData);
next = entry->Next;
free(entry);
}
table->Table[pos] = NULL;
}
table->InDeleteAll = GL_FALSE;
_glthread_UNLOCK_MUTEX(table->Mutex);
}
/**
* Generate texture names.
*
* \param n number of texture names to be generated.
* \param texName an array in which will hold the generated texture names.
*
* \sa glGenTextures().
*
* While holding the GenTexturesLock lock, calls _mesa_HashFindFreeKeyBlock()
* to find a block of free texture IDs which are stored in \p texName.
* Corresponding empty texture objects are also generated.
*/
void GLAPIENTRY
_mesa_GenTextures( GLsizei n, GLuint *texName )
{
GET_CURRENT_CONTEXT(ctx);
GLuint first;
GLint i;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (n < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glGenTextures" );
return;
}
if (!texName)
return;
/*
* This must be atomic (generation and allocation of texture IDs)
*/
_glthread_LOCK_MUTEX(GenTexturesLock);
first = _mesa_HashFindFreeKeyBlock(ctx->Shared->TexObjects, n);
/* Allocate new, empty texture objects */
for (i = 0; i < n; i++) {
struct gl_texture_object *texObj;
GLuint name = first + i;
GLenum target = 0;
texObj = (*ctx->Driver.NewTextureObject)( ctx, name, target);
if (!texObj) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTextures");
return;
}
_mesa_save_texture_object(ctx, texObj);
texName[i] = name;
}
_glthread_UNLOCK_MUTEX(GenTexturesLock);
}
static void
clear_color( GLcontext *ctx, const GLfloat color[4] )
{
if (ctx->DrawBuffer->Name == 0) {
const XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
CLAMPED_FLOAT_TO_UBYTE(xmesa->clearcolor[0], color[0]);
CLAMPED_FLOAT_TO_UBYTE(xmesa->clearcolor[1], color[1]);
CLAMPED_FLOAT_TO_UBYTE(xmesa->clearcolor[2], color[2]);
CLAMPED_FLOAT_TO_UBYTE(xmesa->clearcolor[3], color[3]);
xmesa->clearpixel = xmesa_color_to_pixel( ctx,
xmesa->clearcolor[0],
xmesa->clearcolor[1],
xmesa->clearcolor[2],
xmesa->clearcolor[3],
xmesa->xm_visual->undithered_pf );
_glthread_LOCK_MUTEX(_xmesa_lock);
XMesaSetForeground( xmesa->display, xmbuf->cleargc,
xmesa->clearpixel );
_glthread_UNLOCK_MUTEX(_xmesa_lock);
}
}
/**
* Generate a set of unique buffer object IDs and store them in \c buffer.
*
* \param n Number of IDs to generate.
* \param buffer Array of \c n locations to store the IDs.
*/
void GLAPIENTRY
_mesa_GenBuffersARB(GLsizei n, GLuint *buffer)
{
GET_CURRENT_CONTEXT(ctx);
GLuint first;
GLint i;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glGenBuffers(%d)\n", n);
if (n < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glGenBuffersARB");
return;
}
if (!buffer) {
return;
}
/*
* This must be atomic (generation and allocation of buffer object IDs)
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n);
/* Insert the ID and pointer to dummy buffer object into hash table */
for (i = 0; i < n; i++) {
_mesa_HashInsert(ctx->Shared->BufferObjects, first + i,
&DummyBufferObject);
buffer[i] = first + i;
}
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
/**
* Bind a named texture to a texturing target.
*
* \param target texture target.
* \param texName texture name.
*
* \sa glBindTexture().
*
* Determines the old texture object bound and returns immediately if rebinding
* the same texture. Get the current texture which is either a default texture
* if name is null, a named texture from the hash, or a new texture if the
* given texture name is new. Increments its reference count, binds it, and
* calls dd_function_table::BindTexture. Decrements the old texture reference
* count and deletes it if it reaches zero.
*/
void GLAPIENTRY
_mesa_BindTexture( GLenum target, GLuint texName )
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
struct gl_texture_object *newTexObj = NULL;
GLint targetIndex;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
_mesa_debug(ctx, "glBindTexture %s %d\n",
_mesa_lookup_enum_by_nr(target), (GLint) texName);
targetIndex = target_enum_to_index(ctx, target);
if (targetIndex < 0) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindTexture(target)");
return;
}
assert(targetIndex < NUM_TEXTURE_TARGETS);
/*
* Get pointer to new texture object (newTexObj)
*/
if (texName == 0) {
/* Use a default texture object */
newTexObj = ctx->Shared->DefaultTex[targetIndex];
}
else {
/* non-default texture object */
newTexObj = _mesa_lookup_texture(ctx, texName);
if (newTexObj) {
/* error checking */
if (newTexObj->Target != 0 && newTexObj->Target != target) {
/* the named texture object's target doesn't match the given target */
_mesa_error( ctx, GL_INVALID_OPERATION,
"glBindTexture(target mismatch)" );
return;
}
if (newTexObj->Target == 0) {
finish_texture_init(ctx, target, newTexObj);
}
}
else {
if (ctx->API == API_OPENGL_CORE) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBindTexture");
return;
}
/* if this is a new texture id, allocate a texture object now */
newTexObj = ctx->Driver.NewTextureObject(ctx, texName, target);
if (!newTexObj) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindTexture");
return;
}
/* and insert it into hash table */
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
_mesa_HashInsert(ctx->Shared->TexObjects, texName, newTexObj);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
newTexObj->Target = target;
}
assert(valid_texture_object(newTexObj));
/* Check if this texture is only used by this context and is already bound.
* If so, just return.
*/
{
GLboolean early_out;
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
early_out = ((ctx->Shared->RefCount == 1)
&& (newTexObj == texUnit->CurrentTex[targetIndex]));
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
if (early_out) {
return;
}
}
/* flush before changing binding */
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
/* Do the actual binding. The refcount on the previously bound
* texture object will be decremented. It'll be deleted if the
* count hits zero.
*/
_mesa_reference_texobj(&texUnit->CurrentTex[targetIndex], newTexObj);
ASSERT(texUnit->CurrentTex[targetIndex]);
/* Pass BindTexture call to device driver */
if (ctx->Driver.BindTexture)
ctx->Driver.BindTexture(ctx, target, newTexObj);
}
/**
* Free the data associated with the given context.
*
* But doesn't free the GLcontext struct itself.
*
* \sa _mesa_initialize_context() and init_attrib_groups().
*/
void
_mesa_free_context_data( GLcontext *ctx )
{
GLint RefCount;
if (!_mesa_get_current_context()){
/* No current context, but we may need one in order to delete
* texture objs, etc. So temporarily bind the context now.
*/
_mesa_make_current(ctx, NULL, NULL);
}
/* unreference WinSysDraw/Read buffers */
_mesa_reference_framebuffer(&ctx->WinSysDrawBuffer, NULL);
_mesa_reference_framebuffer(&ctx->WinSysReadBuffer, NULL);
_mesa_reference_framebuffer(&ctx->DrawBuffer, NULL);
_mesa_reference_framebuffer(&ctx->ReadBuffer, NULL);
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, NULL);
_mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
_mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram, NULL);
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, NULL);
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram, NULL);
_mesa_free_attrib_data(ctx);
_mesa_free_lighting_data( ctx );
_mesa_free_eval_data( ctx );
_mesa_free_texture_data( ctx );
_mesa_free_matrix_data( ctx );
_mesa_free_viewport_data( ctx );
_mesa_free_colortables_data( ctx );
_mesa_free_program_data(ctx);
_mesa_free_shader_state(ctx);
_mesa_free_queryobj_data(ctx);
#if FEATURE_ARB_sync
_mesa_free_sync_data(ctx);
#endif
_mesa_free_varray_data(ctx);
_mesa_delete_array_object(ctx, ctx->Array.DefaultArrayObj);
#if FEATURE_ARB_pixel_buffer_object
_mesa_reference_buffer_object(ctx, &ctx->Pack.BufferObj, NULL);
_mesa_reference_buffer_object(ctx, &ctx->Unpack.BufferObj, NULL);
#endif
#if FEATURE_ARB_vertex_buffer_object
_mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj, NULL);
_mesa_reference_buffer_object(ctx, &ctx->Array.ElementArrayBufferObj, NULL);
#endif
/* free dispatch tables */
_mesa_free(ctx->Exec);
_mesa_free(ctx->Save);
/* Shared context state (display lists, textures, etc) */
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
RefCount = --ctx->Shared->RefCount;
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
assert(RefCount >= 0);
if (RefCount == 0) {
/* free shared state */
_mesa_free_shared_state( ctx, ctx->Shared );
}
/* needs to be after freeing shared state */
_mesa_free_display_list_data(ctx);
if (ctx->Extensions.String)
_mesa_free((void *) ctx->Extensions.String);
/* unbind the context if it's currently bound */
if (ctx == _mesa_get_current_context()) {
_mesa_make_current(NULL, NULL, NULL);
}
}
/**
* Initialize a GLcontext struct (rendering context).
*
* This includes allocating all the other structs and arrays which hang off of
* the context by pointers.
* Note that the driver needs to pass in its dd_function_table here since
* we need to at least call driverFunctions->NewTextureObject to create the
* default texture objects.
*
* Called by _mesa_create_context().
*
* Performs the imports and exports callback tables initialization, and
* miscellaneous one-time initializations. If no shared context is supplied one
* is allocated, and increase its reference count. Setups the GL API dispatch
* tables. Initialize the TNL module. Sets the maximum Z buffer depth.
* Finally queries the \c MESA_DEBUG and \c MESA_VERBOSE environment variables
* for debug flags.
*
* \param ctx the context to initialize
* \param visual describes the visual attributes for this context
* \param share_list points to context to share textures, display lists,
* etc with, or NULL
* \param driverFunctions table of device driver functions for this context
* to use
* \param driverContext pointer to driver-specific context data
*/
GLboolean
_mesa_initialize_context(GLcontext *ctx,
const GLvisual *visual,
GLcontext *share_list,
const struct dd_function_table *driverFunctions,
void *driverContext)
{
struct gl_shared_state *shared;
/*ASSERT(driverContext);*/
assert(driverFunctions->NewTextureObject);
assert(driverFunctions->FreeTexImageData);
/* misc one-time initializations */
one_time_init(ctx);
ctx->Visual = *visual;
ctx->DrawBuffer = NULL;
ctx->ReadBuffer = NULL;
ctx->WinSysDrawBuffer = NULL;
ctx->WinSysReadBuffer = NULL;
/* Plug in driver functions and context pointer here.
* This is important because when we call alloc_shared_state() below
* we'll call ctx->Driver.NewTextureObject() to create the default
* textures.
*/
ctx->Driver = *driverFunctions;
ctx->DriverCtx = driverContext;
if (share_list) {
/* share state with another context */
shared = share_list->Shared;
}
else {
/* allocate new, unshared state */
shared = _mesa_alloc_shared_state(ctx);
if (!shared)
return GL_FALSE;
}
_glthread_LOCK_MUTEX(shared->Mutex);
ctx->Shared = shared;
shared->RefCount++;
_glthread_UNLOCK_MUTEX(shared->Mutex);
if (!init_attrib_groups( ctx )) {
_mesa_free_shared_state(ctx, ctx->Shared);
return GL_FALSE;
}
/* setup the API dispatch tables */
ctx->Exec = alloc_dispatch_table();
ctx->Save = alloc_dispatch_table();
if (!ctx->Exec || !ctx->Save) {
_mesa_free_shared_state(ctx, ctx->Shared);
if (ctx->Exec)
_mesa_free(ctx->Exec);
return GL_FALSE;
}
#if FEATURE_dispatch
_mesa_init_exec_table(ctx->Exec);
#endif
ctx->CurrentDispatch = ctx->Exec;
#if FEATURE_dlist
_mesa_init_save_table(ctx->Save);
_mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
#endif
/* Neutral tnl module stuff */
_mesa_init_exec_vtxfmt( ctx );
ctx->TnlModule.Current = NULL;
ctx->TnlModule.SwapCount = 0;
ctx->FragmentProgram._MaintainTexEnvProgram
= (_mesa_getenv("MESA_TEX_PROG") != NULL);
ctx->VertexProgram._MaintainTnlProgram
= (_mesa_getenv("MESA_TNL_PROG") != NULL);
if (ctx->VertexProgram._MaintainTnlProgram) {
/* this is required... */
ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
}
#ifdef FEATURE_extra_context_init
_mesa_initialize_context_extra(ctx);
#endif
ctx->FirstTimeCurrent = GL_TRUE;
return GL_TRUE;
}