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/*
* Mesa 3-D graphics library
*
* Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
*
* 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 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.
*/
/**
* \file remap.c
* Remap table management.
*
* Entries in the dispatch table are either static or dynamic. The
* dispatch table is shared by mesa core and glapi. When they are
* built separately, it is possible that a static entry in mesa core
* is dynamic, or assigned a different static offset, in glapi. The
* remap table is in charge of mapping a static entry in mesa core to
* a dynamic entry, or the corresponding static entry, in glapi.
*/
#include <stdbool.h>
#include "remap.h"
#include "imports.h"
#include "glapi/glapi.h"
#define MAX_ENTRY_POINTS 16
#define need_MESA_remap_table
#include "main/remap_helper.h"
/* this is global for quick access */
int driDispatchRemapTable[driDispatchRemapTable_size];
/**
* Map a function by its spec. The function will be added to glapi,
* and the dispatch offset will be returned.
*
* \param spec a '\0'-separated string array specifying a function.
* It begins with the parameter signature of the function,
* followed by the names of the entry points. An empty entry
* point name terminates the array.
*
* \return the offset of the (re-)mapped function in the dispatch
* table, or -1.
*/
static int
map_function_spec(const char *spec)
{
const char *signature;
const char *names[MAX_ENTRY_POINTS + 1];
int num_names = 0;
if (!spec)
return -1;
signature = spec;
spec += strlen(spec) + 1;
/* spec is terminated by an empty string */
while (*spec) {
names[num_names] = spec;
num_names++;
if (num_names >= MAX_ENTRY_POINTS)
break;
spec += strlen(spec) + 1;
}
if (!num_names)
return -1;
names[num_names] = NULL;
/* add the entry points to the dispatch table */
return _glapi_add_dispatch(names, signature);
}
/**
* Initialize the remap table. This is called in one_time_init().
* The remap table needs to be initialized before calling the
* CALL/GET/SET macros defined in main/dispatch.h.
*/
static void
_mesa_do_init_remap_table(const char *pool,
int size,
const struct gl_function_pool_remap *remap)
{
static bool initialized = false;
GLint i;
if (initialized)
return;
initialized = true;
/* initialize the remap table */
for (i = 0; i < size; i++) {
int offset;
const char *spec;
/* sanity check */
assert(i == remap[i].remap_index);
spec = _mesa_function_pool + remap[i].pool_index;
offset = map_function_spec(spec);
/* store the dispatch offset in the remap table */
driDispatchRemapTable[i] = offset;
if (offset < 0) {
const char *name = spec + strlen(spec) + 1;
_mesa_warning(NULL, "failed to remap %s", name);
}
}
}
void
_mesa_init_remap_table(void)
{
_mesa_do_init_remap_table(_mesa_function_pool,
driDispatchRemapTable_size,
MESA_remap_table_functions);
}
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