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/* |
* Mesa 3-D graphics library |
* Version: 7.7 |
* |
* 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. |
*/ |
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/** |
* \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. |
*/ |
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#include "mfeatures.h" |
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#if FEATURE_remap_table |
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#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" |
|
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/* this is global for quick access */ |
int driDispatchRemapTable[driDispatchRemapTable_size]; |
|
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/** |
* Return the spec string associated with the given function index. |
* The index is available from including remap_helper.h. |
* |
* \param func_index an opaque function index. |
* |
* \return the spec string associated with the function index, or NULL. |
*/ |
const char * |
_mesa_get_function_spec(GLint func_index) |
{ |
if (func_index < Elements(_mesa_function_pool)) |
return _mesa_function_pool + func_index; |
else |
return NULL; |
} |
|
|
/** |
* 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. |
*/ |
GLint |
_mesa_map_function_spec(const char *spec) |
{ |
const char *signature; |
const char *names[MAX_ENTRY_POINTS + 1]; |
GLint 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); |
} |
|
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/** |
* Map an array of functions. This is a convenient function for |
* use with arrays available from including remap_helper.h. |
* |
* Note that the dispatch offsets of the functions are not returned. |
* If they are needed, _mesa_map_function_spec() should be used. |
* |
* \param func_array an array of function remaps. |
*/ |
void |
_mesa_map_function_array(const struct gl_function_remap *func_array) |
{ |
GLint i; |
|
if (!func_array) |
return; |
|
for (i = 0; func_array[i].func_index != -1; i++) { |
const char *spec; |
GLint offset; |
|
spec = _mesa_get_function_spec(func_array[i].func_index); |
if (!spec) { |
_mesa_problem(NULL, "invalid function index %d", |
func_array[i].func_index); |
continue; |
} |
|
offset = _mesa_map_function_spec(spec); |
/* error checks */ |
if (offset < 0) { |
const char *name = spec + strlen(spec) + 1; |
_mesa_warning(NULL, "failed to remap %s", name); |
} |
else if (func_array[i].dispatch_offset >= 0 && |
offset != func_array[i].dispatch_offset) { |
const char *name = spec + strlen(spec) + 1; |
_mesa_problem(NULL, "%s should be mapped to %d, not %d", |
name, func_array[i].dispatch_offset, offset); |
} |
} |
} |
|
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/** |
* Map the functions which are already static. |
* |
* When a extension function are incorporated into the ABI, the |
* extension suffix is usually stripped. Mapping such functions |
* makes sure the alternative names are available. |
* |
* Note that functions mapped by _mesa_init_remap_table() are |
* excluded. |
*/ |
void |
_mesa_map_static_functions(void) |
{ |
/* Remap static functions which have alternative names and are in the ABI. |
* This is to be on the safe side. glapi should have defined those names. |
*/ |
_mesa_map_function_array(MESA_alt_functions); |
} |
|
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/** |
* 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 GLboolean initialized = GL_FALSE; |
GLint i; |
|
if (initialized) |
return; |
initialized = GL_TRUE; |
|
/* initialize the remap table */ |
for (i = 0; i < size; i++) { |
GLint offset; |
const char *spec; |
|
/* sanity check */ |
ASSERT(i == remap[i].remap_index); |
spec = _mesa_function_pool + remap[i].pool_index; |
|
offset = _mesa_map_function_spec(spec); |
/* store the dispatch offset in the remap table */ |
driDispatchRemapTable[i] = offset; |
if (offset < 0) |
_mesa_warning(NULL, "failed to remap index %d", i); |
} |
} |
|
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void |
_mesa_init_remap_table(void) |
{ |
_mesa_do_init_remap_table(_mesa_function_pool, |
driDispatchRemapTable_size, |
MESA_remap_table_functions); |
} |
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#endif /* FEATURE_remap_table */ |