| /* |
| * 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. |
| */ |
| |
| |
| /** |
| * \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 "mfeatures.h" |
| |
| #if FEATURE_remap_table |
| |
| #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]; |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| } |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| } |
| |
| |
| void |
| _mesa_init_remap_table(void) |
| { |
| _mesa_do_init_remap_table(_mesa_function_pool, |
| driDispatchRemapTable_size, |
| MESA_remap_table_functions); |
| } |
| |
| |
| #endif /* FEATURE_remap_table */ |